diff options
Diffstat (limited to 'Godeps/_workspace/src/code.google.com/p/draw2d')
34 files changed, 0 insertions, 5618 deletions
diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/advanced_path.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/advanced_path.go deleted file mode 100644 index 68f1d782b..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/advanced_path.go +++ /dev/null @@ -1,42 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 13/12/2010 by Laurent Le Goff - -package draw2d - -import ( - "math" -) - -//high level path creation - -func Rect(path Path, x1, y1, x2, y2 float64) { - path.MoveTo(x1, y1) - path.LineTo(x2, y1) - path.LineTo(x2, y2) - path.LineTo(x1, y2) - path.Close() -} - -func RoundRect(path Path, x1, y1, x2, y2, arcWidth, arcHeight float64) { - arcWidth = arcWidth / 2 - arcHeight = arcHeight / 2 - path.MoveTo(x1, y1+arcHeight) - path.QuadCurveTo(x1, y1, x1+arcWidth, y1) - path.LineTo(x2-arcWidth, y1) - path.QuadCurveTo(x2, y1, x2, y1+arcHeight) - path.LineTo(x2, y2-arcHeight) - path.QuadCurveTo(x2, y2, x2-arcWidth, y2) - path.LineTo(x1+arcWidth, y2) - path.QuadCurveTo(x1, y2, x1, y2-arcHeight) - path.Close() -} - -func Ellipse(path Path, cx, cy, rx, ry float64) { - path.ArcTo(cx, cy, rx, ry, 0, -math.Pi*2) - path.Close() -} - -func Circle(path Path, cx, cy, radius float64) { - path.ArcTo(cx, cy, radius, radius, 0, -math.Pi*2) - path.Close() -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/arc.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/arc.go deleted file mode 100644 index 0698b8da0..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/arc.go +++ /dev/null @@ -1,67 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff - -package draw2d - -import ( - "code.google.com/p/freetype-go/freetype/raster" - "math" -) - -func arc(t VertexConverter, x, y, rx, ry, start, angle, scale float64) (lastX, lastY float64) { - end := start + angle - clockWise := true - if angle < 0 { - clockWise = false - } - ra := (math.Abs(rx) + math.Abs(ry)) / 2 - da := math.Acos(ra/(ra+0.125/scale)) * 2 - //normalize - if !clockWise { - da = -da - } - angle = start + da - var curX, curY float64 - for { - if (angle < end-da/4) != clockWise { - curX = x + math.Cos(end)*rx - curY = y + math.Sin(end)*ry - return curX, curY - } - curX = x + math.Cos(angle)*rx - curY = y + math.Sin(angle)*ry - - angle += da - t.Vertex(curX, curY) - } - return curX, curY -} - -func arcAdder(adder raster.Adder, x, y, rx, ry, start, angle, scale float64) raster.Point { - end := start + angle - clockWise := true - if angle < 0 { - clockWise = false - } - ra := (math.Abs(rx) + math.Abs(ry)) / 2 - da := math.Acos(ra/(ra+0.125/scale)) * 2 - //normalize - if !clockWise { - da = -da - } - angle = start + da - var curX, curY float64 - for { - if (angle < end-da/4) != clockWise { - curX = x + math.Cos(end)*rx - curY = y + math.Sin(end)*ry - return raster.Point{raster.Fix32(curX * 256), raster.Fix32(curY * 256)} - } - curX = x + math.Cos(angle)*rx - curY = y + math.Sin(angle)*ry - - angle += da - adder.Add1(raster.Point{raster.Fix32(curX * 256), raster.Fix32(curY * 256)}) - } - return raster.Point{raster.Fix32(curX * 256), raster.Fix32(curY * 256)} -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/Makefile b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/Makefile deleted file mode 100644 index 15ceee070..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/Makefile +++ /dev/null @@ -1,11 +0,0 @@ -include $(GOROOT)/src/Make.inc
-
-TARG=draw2d.googlecode.com/hg/draw2d/curve
-GOFILES=\
- cubic_float64.go\
- quad_float64.go\
- cubic_float64_others.go\
-
-
-
-include $(GOROOT)/src/Make.pkg
diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/arc.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/arc.go deleted file mode 100644 index 92850e979..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/arc.go +++ /dev/null @@ -1,36 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff -package curve - -import ( - "math" -) - -func SegmentArc(t LineTracer, x, y, rx, ry, start, angle, scale float64) { - end := start + angle - clockWise := true - if angle < 0 { - clockWise = false - } - ra := (math.Abs(rx) + math.Abs(ry)) / 2 - da := math.Acos(ra/(ra+0.125/scale)) * 2 - //normalize - if !clockWise { - da = -da - } - angle = start + da - var curX, curY float64 - for { - if (angle < end-da/4) != clockWise { - curX = x + math.Cos(end)*rx - curY = y + math.Sin(end)*ry - break; - } - curX = x + math.Cos(angle)*rx - curY = y + math.Sin(angle)*ry - - angle += da - t.LineTo(curX, curY) - } - t.LineTo(curX, curY) -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/cubic_float64.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/cubic_float64.go deleted file mode 100644 index 64a7ac639..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/cubic_float64.go +++ /dev/null @@ -1,67 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 17/05/2011 by Laurent Le Goff -package curve - -import ( - "math" -) - -const ( - CurveRecursionLimit = 32 -) - -// X1, Y1, X2, Y2, X3, Y3, X4, Y4 float64 -type CubicCurveFloat64 [8]float64 - -type LineTracer interface { - LineTo(x, y float64) -} - -func (c *CubicCurveFloat64) Subdivide(c1, c2 *CubicCurveFloat64) (x23, y23 float64) { - // Calculate all the mid-points of the line segments - //---------------------- - c1[0], c1[1] = c[0], c[1] - c2[6], c2[7] = c[6], c[7] - c1[2] = (c[0] + c[2]) / 2 - c1[3] = (c[1] + c[3]) / 2 - x23 = (c[2] + c[4]) / 2 - y23 = (c[3] + c[5]) / 2 - c2[4] = (c[4] + c[6]) / 2 - c2[5] = (c[5] + c[7]) / 2 - c1[4] = (c1[2] + x23) / 2 - c1[5] = (c1[3] + y23) / 2 - c2[2] = (x23 + c2[4]) / 2 - c2[3] = (y23 + c2[5]) / 2 - c1[6] = (c1[4] + c2[2]) / 2 - c1[7] = (c1[5] + c2[3]) / 2 - c2[0], c2[1] = c1[6], c1[7] - return -} - -func (curve *CubicCurveFloat64) Segment(t LineTracer, flattening_threshold float64) { - var curves [CurveRecursionLimit]CubicCurveFloat64 - curves[0] = *curve - i := 0 - // current curve - var c *CubicCurveFloat64 - - var dx, dy, d2, d3 float64 - - for i >= 0 { - c = &curves[i] - dx = c[6] - c[0] - dy = c[7] - c[1] - - d2 = math.Abs(((c[2]-c[6])*dy - (c[3]-c[7])*dx)) - d3 = math.Abs(((c[4]-c[6])*dy - (c[5]-c[7])*dx)) - - if (d2+d3)*(d2+d3) < flattening_threshold*(dx*dx+dy*dy) || i == len(curves)-1 { - t.LineTo(c[6], c[7]) - i-- - } else { - // second half of bezier go lower onto the stack - c.Subdivide(&curves[i+1], &curves[i]) - i++ - } - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/cubic_float64_others.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/cubic_float64_others.go deleted file mode 100644 index a888b22a1..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/cubic_float64_others.go +++ /dev/null @@ -1,696 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 17/05/2011 by Laurent Le Goff -package curve - -import ( - "math" -) - -const ( - CurveCollinearityEpsilon = 1e-30 - CurveAngleToleranceEpsilon = 0.01 -) - -//mu ranges from 0 to 1, start to end of curve -func (c *CubicCurveFloat64) ArbitraryPoint(mu float64) (x, y float64) { - - mum1 := 1 - mu - mum13 := mum1 * mum1 * mum1 - mu3 := mu * mu * mu - - x = mum13*c[0] + 3*mu*mum1*mum1*c[2] + 3*mu*mu*mum1*c[4] + mu3*c[6] - y = mum13*c[1] + 3*mu*mum1*mum1*c[3] + 3*mu*mu*mum1*c[5] + mu3*c[7] - return -} - -func (c *CubicCurveFloat64) SubdivideAt(c1, c2 *CubicCurveFloat64, t float64) (x23, y23 float64) { - inv_t := (1 - t) - c1[0], c1[1] = c[0], c[1] - c2[6], c2[7] = c[6], c[7] - - c1[2] = inv_t*c[0] + t*c[2] - c1[3] = inv_t*c[1] + t*c[3] - - x23 = inv_t*c[2] + t*c[4] - y23 = inv_t*c[3] + t*c[5] - - c2[4] = inv_t*c[4] + t*c[6] - c2[5] = inv_t*c[5] + t*c[7] - - c1[4] = inv_t*c1[2] + t*x23 - c1[5] = inv_t*c1[3] + t*y23 - - c2[2] = inv_t*x23 + t*c2[4] - c2[3] = inv_t*y23 + t*c2[5] - - c1[6] = inv_t*c1[4] + t*c2[2] - c1[7] = inv_t*c1[5] + t*c2[3] - - c2[0], c2[1] = c1[6], c1[7] - return -} - -func (c *CubicCurveFloat64) EstimateDistance() float64 { - dx1 := c[2] - c[0] - dy1 := c[3] - c[1] - dx2 := c[4] - c[2] - dy2 := c[5] - c[3] - dx3 := c[6] - c[4] - dy3 := c[7] - c[5] - return math.Sqrt(dx1*dx1+dy1*dy1) + math.Sqrt(dx2*dx2+dy2*dy2) + math.Sqrt(dx3*dx3+dy3*dy3) -} - -// subdivide the curve in straight lines using line approximation and Casteljau recursive subdivision -func (c *CubicCurveFloat64) SegmentRec(t LineTracer, flattening_threshold float64) { - c.segmentRec(t, flattening_threshold) - t.LineTo(c[6], c[7]) -} - -func (c *CubicCurveFloat64) segmentRec(t LineTracer, flattening_threshold float64) { - var c1, c2 CubicCurveFloat64 - c.Subdivide(&c1, &c2) - - // Try to approximate the full cubic curve by a single straight line - //------------------ - dx := c[6] - c[0] - dy := c[7] - c[1] - - d2 := math.Abs(((c[2]-c[6])*dy - (c[3]-c[7])*dx)) - d3 := math.Abs(((c[4]-c[6])*dy - (c[5]-c[7])*dx)) - - if (d2+d3)*(d2+d3) < flattening_threshold*(dx*dx+dy*dy) { - t.LineTo(c[6], c[7]) - return - } - // Continue subdivision - //---------------------- - c1.segmentRec(t, flattening_threshold) - c2.segmentRec(t, flattening_threshold) -} - -/* - The function has the following parameters: - approximationScale : - Eventually determines the approximation accuracy. In practice we need to transform points from the World coordinate system to the Screen one. - It always has some scaling coefficient. - The curves are usually processed in the World coordinates, while the approximation accuracy should be eventually in pixels. - Usually it looks as follows: - curved.approximationScale(transform.scale()); - where transform is the affine matrix that includes all the transformations, including viewport and zoom. - angleTolerance : - You set it in radians. - The less this value is the more accurate will be the approximation at sharp turns. - But 0 means that we don't consider angle conditions at all. - cuspLimit : - An angle in radians. - If 0, only the real cusps will have bevel cuts. - If more than 0, it will restrict the sharpness. - The more this value is the less sharp turns will be cut. - Typically it should not exceed 10-15 degrees. -*/ -func (c *CubicCurveFloat64) AdaptiveSegmentRec(t LineTracer, approximationScale, angleTolerance, cuspLimit float64) { - cuspLimit = computeCuspLimit(cuspLimit) - distanceToleranceSquare := 0.5 / approximationScale - distanceToleranceSquare = distanceToleranceSquare * distanceToleranceSquare - c.adaptiveSegmentRec(t, 0, distanceToleranceSquare, angleTolerance, cuspLimit) - t.LineTo(c[6], c[7]) -} - -func computeCuspLimit(v float64) (r float64) { - if v == 0.0 { - r = 0.0 - } else { - r = math.Pi - v - } - return -} - -func squareDistance(x1, y1, x2, y2 float64) float64 { - dx := x2 - x1 - dy := y2 - y1 - return dx*dx + dy*dy -} - -/** - * http://www.antigrain.com/research/adaptive_bezier/index.html - */ -func (c *CubicCurveFloat64) adaptiveSegmentRec(t LineTracer, level int, distanceToleranceSquare, angleTolerance, cuspLimit float64) { - if level > CurveRecursionLimit { - return - } - var c1, c2 CubicCurveFloat64 - x23, y23 := c.Subdivide(&c1, &c2) - - // Try to approximate the full cubic curve by a single straight line - //------------------ - dx := c[6] - c[0] - dy := c[7] - c[1] - - d2 := math.Abs(((c[2]-c[6])*dy - (c[3]-c[7])*dx)) - d3 := math.Abs(((c[4]-c[6])*dy - (c[5]-c[7])*dx)) - switch { - case d2 <= CurveCollinearityEpsilon && d3 <= CurveCollinearityEpsilon: - // All collinear OR p1==p4 - //---------------------- - k := dx*dx + dy*dy - if k == 0 { - d2 = squareDistance(c[0], c[1], c[2], c[3]) - d3 = squareDistance(c[6], c[7], c[4], c[5]) - } else { - k = 1 / k - da1 := c[2] - c[0] - da2 := c[3] - c[1] - d2 = k * (da1*dx + da2*dy) - da1 = c[4] - c[0] - da2 = c[5] - c[1] - d3 = k * (da1*dx + da2*dy) - if d2 > 0 && d2 < 1 && d3 > 0 && d3 < 1 { - // Simple collinear case, 1---2---3---4 - // We can leave just two endpoints - return - } - if d2 <= 0 { - d2 = squareDistance(c[2], c[3], c[0], c[1]) - } else if d2 >= 1 { - d2 = squareDistance(c[2], c[3], c[6], c[7]) - } else { - d2 = squareDistance(c[2], c[3], c[0]+d2*dx, c[1]+d2*dy) - } - - if d3 <= 0 { - d3 = squareDistance(c[4], c[5], c[0], c[1]) - } else if d3 >= 1 { - d3 = squareDistance(c[4], c[5], c[6], c[7]) - } else { - d3 = squareDistance(c[4], c[5], c[0]+d3*dx, c[1]+d3*dy) - } - } - if d2 > d3 { - if d2 < distanceToleranceSquare { - t.LineTo(c[2], c[3]) - return - } - } else { - if d3 < distanceToleranceSquare { - t.LineTo(c[4], c[5]) - return - } - } - - case d2 <= CurveCollinearityEpsilon && d3 > CurveCollinearityEpsilon: - // p1,p2,p4 are collinear, p3 is significant - //---------------------- - if d3*d3 <= distanceToleranceSquare*(dx*dx+dy*dy) { - if angleTolerance < CurveAngleToleranceEpsilon { - t.LineTo(x23, y23) - return - } - - // Angle Condition - //---------------------- - da1 := math.Abs(math.Atan2(c[7]-c[5], c[6]-c[4]) - math.Atan2(c[5]-c[3], c[4]-c[2])) - if da1 >= math.Pi { - da1 = 2*math.Pi - da1 - } - - if da1 < angleTolerance { - t.LineTo(c[2], c[3]) - t.LineTo(c[4], c[5]) - return - } - - if cuspLimit != 0.0 { - if da1 > cuspLimit { - t.LineTo(c[4], c[5]) - return - } - } - } - - case d2 > CurveCollinearityEpsilon && d3 <= CurveCollinearityEpsilon: - // p1,p3,p4 are collinear, p2 is significant - //---------------------- - if d2*d2 <= distanceToleranceSquare*(dx*dx+dy*dy) { - if angleTolerance < CurveAngleToleranceEpsilon { - t.LineTo(x23, y23) - return - } - - // Angle Condition - //---------------------- - da1 := math.Abs(math.Atan2(c[5]-c[3], c[4]-c[2]) - math.Atan2(c[3]-c[1], c[2]-c[0])) - if da1 >= math.Pi { - da1 = 2*math.Pi - da1 - } - - if da1 < angleTolerance { - t.LineTo(c[2], c[3]) - t.LineTo(c[4], c[5]) - return - } - - if cuspLimit != 0.0 { - if da1 > cuspLimit { - t.LineTo(c[2], c[3]) - return - } - } - } - - case d2 > CurveCollinearityEpsilon && d3 > CurveCollinearityEpsilon: - // Regular case - //----------------- - if (d2+d3)*(d2+d3) <= distanceToleranceSquare*(dx*dx+dy*dy) { - // If the curvature doesn't exceed the distanceTolerance value - // we tend to finish subdivisions. - //---------------------- - if angleTolerance < CurveAngleToleranceEpsilon { - t.LineTo(x23, y23) - return - } - - // Angle & Cusp Condition - //---------------------- - k := math.Atan2(c[5]-c[3], c[4]-c[2]) - da1 := math.Abs(k - math.Atan2(c[3]-c[1], c[2]-c[0])) - da2 := math.Abs(math.Atan2(c[7]-c[5], c[6]-c[4]) - k) - if da1 >= math.Pi { - da1 = 2*math.Pi - da1 - } - if da2 >= math.Pi { - da2 = 2*math.Pi - da2 - } - - if da1+da2 < angleTolerance { - // Finally we can stop the recursion - //---------------------- - t.LineTo(x23, y23) - return - } - - if cuspLimit != 0.0 { - if da1 > cuspLimit { - t.LineTo(c[2], c[3]) - return - } - - if da2 > cuspLimit { - t.LineTo(c[4], c[5]) - return - } - } - } - } - - // Continue subdivision - //---------------------- - c1.adaptiveSegmentRec(t, level+1, distanceToleranceSquare, angleTolerance, cuspLimit) - c2.adaptiveSegmentRec(t, level+1, distanceToleranceSquare, angleTolerance, cuspLimit) - -} - -func (curve *CubicCurveFloat64) AdaptiveSegment(t LineTracer, approximationScale, angleTolerance, cuspLimit float64) { - cuspLimit = computeCuspLimit(cuspLimit) - distanceToleranceSquare := 0.5 / approximationScale - distanceToleranceSquare = distanceToleranceSquare * distanceToleranceSquare - - var curves [CurveRecursionLimit]CubicCurveFloat64 - curves[0] = *curve - i := 0 - // current curve - var c *CubicCurveFloat64 - var c1, c2 CubicCurveFloat64 - var dx, dy, d2, d3, k, x23, y23 float64 - for i >= 0 { - c = &curves[i] - x23, y23 = c.Subdivide(&c1, &c2) - - // Try to approximate the full cubic curve by a single straight line - //------------------ - dx = c[6] - c[0] - dy = c[7] - c[1] - - d2 = math.Abs(((c[2]-c[6])*dy - (c[3]-c[7])*dx)) - d3 = math.Abs(((c[4]-c[6])*dy - (c[5]-c[7])*dx)) - switch { - case i == len(curves)-1: - t.LineTo(c[6], c[7]) - i-- - continue - case d2 <= CurveCollinearityEpsilon && d3 <= CurveCollinearityEpsilon: - // All collinear OR p1==p4 - //---------------------- - k = dx*dx + dy*dy - if k == 0 { - d2 = squareDistance(c[0], c[1], c[2], c[3]) - d3 = squareDistance(c[6], c[7], c[4], c[5]) - } else { - k = 1 / k - da1 := c[2] - c[0] - da2 := c[3] - c[1] - d2 = k * (da1*dx + da2*dy) - da1 = c[4] - c[0] - da2 = c[5] - c[1] - d3 = k * (da1*dx + da2*dy) - if d2 > 0 && d2 < 1 && d3 > 0 && d3 < 1 { - // Simple collinear case, 1---2---3---4 - // We can leave just two endpoints - i-- - continue - } - if d2 <= 0 { - d2 = squareDistance(c[2], c[3], c[0], c[1]) - } else if d2 >= 1 { - d2 = squareDistance(c[2], c[3], c[6], c[7]) - } else { - d2 = squareDistance(c[2], c[3], c[0]+d2*dx, c[1]+d2*dy) - } - - if d3 <= 0 { - d3 = squareDistance(c[4], c[5], c[0], c[1]) - } else if d3 >= 1 { - d3 = squareDistance(c[4], c[5], c[6], c[7]) - } else { - d3 = squareDistance(c[4], c[5], c[0]+d3*dx, c[1]+d3*dy) - } - } - if d2 > d3 { - if d2 < distanceToleranceSquare { - t.LineTo(c[2], c[3]) - i-- - continue - } - } else { - if d3 < distanceToleranceSquare { - t.LineTo(c[4], c[5]) - i-- - continue - } - } - - case d2 <= CurveCollinearityEpsilon && d3 > CurveCollinearityEpsilon: - // p1,p2,p4 are collinear, p3 is significant - //---------------------- - if d3*d3 <= distanceToleranceSquare*(dx*dx+dy*dy) { - if angleTolerance < CurveAngleToleranceEpsilon { - t.LineTo(x23, y23) - i-- - continue - } - - // Angle Condition - //---------------------- - da1 := math.Abs(math.Atan2(c[7]-c[5], c[6]-c[4]) - math.Atan2(c[5]-c[3], c[4]-c[2])) - if da1 >= math.Pi { - da1 = 2*math.Pi - da1 - } - - if da1 < angleTolerance { - t.LineTo(c[2], c[3]) - t.LineTo(c[4], c[5]) - i-- - continue - } - - if cuspLimit != 0.0 { - if da1 > cuspLimit { - t.LineTo(c[4], c[5]) - i-- - continue - } - } - } - - case d2 > CurveCollinearityEpsilon && d3 <= CurveCollinearityEpsilon: - // p1,p3,p4 are collinear, p2 is significant - //---------------------- - if d2*d2 <= distanceToleranceSquare*(dx*dx+dy*dy) { - if angleTolerance < CurveAngleToleranceEpsilon { - t.LineTo(x23, y23) - i-- - continue - } - - // Angle Condition - //---------------------- - da1 := math.Abs(math.Atan2(c[5]-c[3], c[4]-c[2]) - math.Atan2(c[3]-c[1], c[2]-c[0])) - if da1 >= math.Pi { - da1 = 2*math.Pi - da1 - } - - if da1 < angleTolerance { - t.LineTo(c[2], c[3]) - t.LineTo(c[4], c[5]) - i-- - continue - } - - if cuspLimit != 0.0 { - if da1 > cuspLimit { - t.LineTo(c[2], c[3]) - i-- - continue - } - } - } - - case d2 > CurveCollinearityEpsilon && d3 > CurveCollinearityEpsilon: - // Regular case - //----------------- - if (d2+d3)*(d2+d3) <= distanceToleranceSquare*(dx*dx+dy*dy) { - // If the curvature doesn't exceed the distanceTolerance value - // we tend to finish subdivisions. - //---------------------- - if angleTolerance < CurveAngleToleranceEpsilon { - t.LineTo(x23, y23) - i-- - continue - } - - // Angle & Cusp Condition - //---------------------- - k := math.Atan2(c[5]-c[3], c[4]-c[2]) - da1 := math.Abs(k - math.Atan2(c[3]-c[1], c[2]-c[0])) - da2 := math.Abs(math.Atan2(c[7]-c[5], c[6]-c[4]) - k) - if da1 >= math.Pi { - da1 = 2*math.Pi - da1 - } - if da2 >= math.Pi { - da2 = 2*math.Pi - da2 - } - - if da1+da2 < angleTolerance { - // Finally we can stop the recursion - //---------------------- - t.LineTo(x23, y23) - i-- - continue - } - - if cuspLimit != 0.0 { - if da1 > cuspLimit { - t.LineTo(c[2], c[3]) - i-- - continue - } - - if da2 > cuspLimit { - t.LineTo(c[4], c[5]) - i-- - continue - } - } - } - } - - // Continue subdivision - //---------------------- - curves[i+1], curves[i] = c1, c2 - i++ - } - t.LineTo(curve[6], curve[7]) -} - -/********************** Ahmad thesis *******************/ - -/************************************************************************************** -* This code is the implementation of the Parabolic Approximation (PA). Although * -* it uses recursive subdivision as a safe net for the failing cases, this is an * -* iterative routine and reduces considerably the number of vertices (point) * -* generation. * -**************************************************************************************/ - -func (c *CubicCurveFloat64) ParabolicSegment(t LineTracer, flattening_threshold float64) { - estimatedIFP := c.numberOfInflectionPoints() - if estimatedIFP == 0 { - // If no inflection points then apply PA on the full Bezier segment. - c.doParabolicApproximation(t, flattening_threshold) - return - } - // If one or more inflection point then we will have to subdivide the curve - numOfIfP, t1, t2 := c.findInflectionPoints() - if numOfIfP == 2 { - // Case when 2 inflection points then divide at the smallest one first - var sub1, tmp1, sub2, sub3 CubicCurveFloat64 - c.SubdivideAt(&sub1, &tmp1, t1) - // Now find the second inflection point in the second curve an subdivide - numOfIfP, t1, t2 = tmp1.findInflectionPoints() - if numOfIfP == 2 { - tmp1.SubdivideAt(&sub2, &sub3, t2) - } else if numOfIfP == 1 { - tmp1.SubdivideAt(&sub2, &sub3, t1) - } else { - return - } - // Use PA for first subsegment - sub1.doParabolicApproximation(t, flattening_threshold) - // Use RS for the second (middle) subsegment - sub2.Segment(t, flattening_threshold) - // Drop the last point in the array will be added by the PA in third subsegment - //noOfPoints--; - // Use PA for the third curve - sub3.doParabolicApproximation(t, flattening_threshold) - } else if numOfIfP == 1 { - // Case where there is one inflection point, subdivide once and use PA on - // both subsegments - var sub1, sub2 CubicCurveFloat64 - c.SubdivideAt(&sub1, &sub2, t1) - sub1.doParabolicApproximation(t, flattening_threshold) - //noOfPoints--; - sub2.doParabolicApproximation(t, flattening_threshold) - } else { - // Case where there is no inflection USA PA directly - c.doParabolicApproximation(t, flattening_threshold) - } -} - -// Find the third control point deviation form the axis -func (c *CubicCurveFloat64) thirdControlPointDeviation() float64 { - dx := c[2] - c[0] - dy := c[3] - c[1] - l2 := dx*dx + dy*dy - if l2 == 0 { - return 0 - } - l := math.Sqrt(l2) - r := (c[3] - c[1]) / l - s := (c[0] - c[2]) / l - u := (c[2]*c[1] - c[0]*c[3]) / l - return math.Abs(r*c[4] + s*c[5] + u) -} - -// Find the number of inflection point -func (c *CubicCurveFloat64) numberOfInflectionPoints() int { - dx21 := (c[2] - c[0]) - dy21 := (c[3] - c[1]) - dx32 := (c[4] - c[2]) - dy32 := (c[5] - c[3]) - dx43 := (c[6] - c[4]) - dy43 := (c[7] - c[5]) - if ((dx21*dy32 - dy21*dx32) * (dx32*dy43 - dy32*dx43)) < 0 { - return 1 // One inflection point - } else if ((dx21*dy32 - dy21*dx32) * (dx21*dy43 - dy21*dx43)) > 0 { - return 0 // No inflection point - } else { - // Most cases no inflection point - b1 := (dx21*dx32 + dy21*dy32) > 0 - b2 := (dx32*dx43 + dy32*dy43) > 0 - if b1 || b2 && !(b1 && b2) { // xor!! - return 0 - } - } - return -1 // cases where there in zero or two inflection points -} - -// This is the main function where all the work is done -func (curve *CubicCurveFloat64) doParabolicApproximation(tracer LineTracer, flattening_threshold float64) { - var c *CubicCurveFloat64 - c = curve - var d, t, dx, dy, d2, d3 float64 - for { - dx = c[6] - c[0] - dy = c[7] - c[1] - - d2 = math.Abs(((c[2]-c[6])*dy - (c[3]-c[7])*dx)) - d3 = math.Abs(((c[4]-c[6])*dy - (c[5]-c[7])*dx)) - - if (d2+d3)*(d2+d3) < flattening_threshold*(dx*dx+dy*dy) { - // If the subsegment deviation satisfy the flatness then store the last - // point and stop - tracer.LineTo(c[6], c[7]) - break - } - // Find the third control point deviation and the t values for subdivision - d = c.thirdControlPointDeviation() - t = 2 * math.Sqrt(flattening_threshold/d/3) - if t > 1 { - // Case where the t value calculated is invalid so using RS - c.Segment(tracer, flattening_threshold) - break - } - // Valid t value to subdivide at that calculated value - var b1, b2 CubicCurveFloat64 - c.SubdivideAt(&b1, &b2, t) - // First subsegment should have its deviation equal to flatness - dx = b1[6] - b1[0] - dy = b1[7] - b1[1] - - d2 = math.Abs(((b1[2]-b1[6])*dy - (b1[3]-b1[7])*dx)) - d3 = math.Abs(((b1[4]-b1[6])*dy - (b1[5]-b1[7])*dx)) - - if (d2+d3)*(d2+d3) > flattening_threshold*(dx*dx+dy*dy) { - // if not then use RS to handle any mathematical errors - b1.Segment(tracer, flattening_threshold) - } else { - tracer.LineTo(b1[6], b1[7]) - } - // repeat the process for the left over subsegment. - c = &b2 - } -} - -// Find the actual inflection points and return the number of inflection points found -// if 2 inflection points found, the first one returned will be with smaller t value. -func (curve *CubicCurveFloat64) findInflectionPoints() (int, firstIfp, secondIfp float64) { - // For Cubic Bezier curve with equation P=a*t^3 + b*t^2 + c*t + d - // slope of the curve dP/dt = 3*a*t^2 + 2*b*t + c - // a = (float)(-bez.p1 + 3*bez.p2 - 3*bez.p3 + bez.p4); - // b = (float)(3*bez.p1 - 6*bez.p2 + 3*bez.p3); - // c = (float)(-3*bez.p1 + 3*bez.p2); - ax := (-curve[0] + 3*curve[2] - 3*curve[4] + curve[6]) - bx := (3*curve[0] - 6*curve[2] + 3*curve[4]) - cx := (-3*curve[0] + 3*curve[2]) - ay := (-curve[1] + 3*curve[3] - 3*curve[5] + curve[7]) - by := (3*curve[1] - 6*curve[3] + 3*curve[5]) - cy := (-3*curve[1] + 3*curve[3]) - a := (3 * (ay*bx - ax*by)) - b := (3 * (ay*cx - ax*cy)) - c := (by*cx - bx*cy) - r2 := (b*b - 4*a*c) - firstIfp = 0.0 - secondIfp = 0.0 - if r2 >= 0.0 && a != 0.0 { - r := math.Sqrt(r2) - firstIfp = ((-b + r) / (2 * a)) - secondIfp = ((-b - r) / (2 * a)) - if (firstIfp > 0.0 && firstIfp < 1.0) && (secondIfp > 0.0 && secondIfp < 1.0) { - if firstIfp > secondIfp { - tmp := firstIfp - firstIfp = secondIfp - secondIfp = tmp - } - if secondIfp-firstIfp > 0.00001 { - return 2, firstIfp, secondIfp - } else { - return 1, firstIfp, secondIfp - } - } else if firstIfp > 0.0 && firstIfp < 1.0 { - return 1, firstIfp, secondIfp - } else if secondIfp > 0.0 && secondIfp < 1.0 { - firstIfp = secondIfp - return 1, firstIfp, secondIfp - } - return 0, firstIfp, secondIfp - } - return 0, firstIfp, secondIfp -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/curve_test.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/curve_test.go deleted file mode 100644 index 5e9eecac0..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/curve_test.go +++ /dev/null @@ -1,262 +0,0 @@ -package curve - -import ( - "bufio" - "code.google.com/p/draw2d/draw2d/raster" - "fmt" - "image" - "image/color" - "image/draw" - "image/png" - "log" - "os" - "testing" -) - -var ( - flattening_threshold float64 = 0.5 - testsCubicFloat64 = []CubicCurveFloat64{ - CubicCurveFloat64{100, 100, 200, 100, 100, 200, 200, 200}, - CubicCurveFloat64{100, 100, 300, 200, 200, 200, 300, 100}, - CubicCurveFloat64{100, 100, 0, 300, 200, 0, 300, 300}, - CubicCurveFloat64{150, 290, 10, 10, 290, 10, 150, 290}, - CubicCurveFloat64{10, 290, 10, 10, 290, 10, 290, 290}, - CubicCurveFloat64{100, 290, 290, 10, 10, 10, 200, 290}, - } - testsQuadFloat64 = []QuadCurveFloat64{ - QuadCurveFloat64{100, 100, 200, 100, 200, 200}, - QuadCurveFloat64{100, 100, 290, 200, 290, 100}, - QuadCurveFloat64{100, 100, 0, 290, 200, 290}, - QuadCurveFloat64{150, 290, 10, 10, 290, 290}, - QuadCurveFloat64{10, 290, 10, 10, 290, 290}, - QuadCurveFloat64{100, 290, 290, 10, 120, 290}, - } -) - -type Path struct { - points []float64 -} - -func (p *Path) LineTo(x, y float64) { - if len(p.points)+2 > cap(p.points) { - points := make([]float64, len(p.points)+2, len(p.points)+32) - copy(points, p.points) - p.points = points - } else { - p.points = p.points[0 : len(p.points)+2] - } - p.points[len(p.points)-2] = x - p.points[len(p.points)-1] = y -} - -func init() { - f, err := os.Create("_test.html") - if err != nil { - log.Println(err) - os.Exit(1) - } - defer f.Close() - log.Printf("Create html viewer") - f.Write([]byte("<html><body>")) - for i := 0; i < len(testsCubicFloat64); i++ { - f.Write([]byte(fmt.Sprintf("<div><img src='_testRec%d.png'/>\n<img src='_test%d.png'/>\n<img src='_testAdaptiveRec%d.png'/>\n<img src='_testAdaptive%d.png'/>\n<img src='_testParabolic%d.png'/>\n</div>\n", i, i, i, i, i))) - } - for i := 0; i < len(testsQuadFloat64); i++ { - f.Write([]byte(fmt.Sprintf("<div><img src='_testQuad%d.png'/>\n</div>\n", i))) - } - f.Write([]byte("</body></html>")) - -} - -func savepng(filePath string, m image.Image) { - f, err := os.Create(filePath) - if err != nil { - log.Println(err) - os.Exit(1) - } - defer f.Close() - b := bufio.NewWriter(f) - err = png.Encode(b, m) - if err != nil { - log.Println(err) - os.Exit(1) - } - err = b.Flush() - if err != nil { - log.Println(err) - os.Exit(1) - } -} - -func drawPoints(img draw.Image, c color.Color, s ...float64) image.Image { - /*for i := 0; i < len(s); i += 2 { - x, y := int(s[i]+0.5), int(s[i+1]+0.5) - img.Set(x, y, c) - img.Set(x, y+1, c) - img.Set(x, y-1, c) - img.Set(x+1, y, c) - img.Set(x+1, y+1, c) - img.Set(x+1, y-1, c) - img.Set(x-1, y, c) - img.Set(x-1, y+1, c) - img.Set(x-1, y-1, c) - - }*/ - return img -} - -func TestCubicCurveRec(t *testing.T) { - for i, curve := range testsCubicFloat64 { - var p Path - p.LineTo(curve[0], curve[1]) - curve.SegmentRec(&p, flattening_threshold) - img := image.NewNRGBA(image.Rect(0, 0, 300, 300)) - raster.PolylineBresenham(img, color.NRGBA{0xff, 0, 0, 0xff}, curve[:]...) - raster.PolylineBresenham(img, image.Black, p.points...) - //drawPoints(img, image.NRGBAColor{0, 0, 0, 0xff}, curve[:]...) - drawPoints(img, color.NRGBA{0, 0, 0, 0xff}, p.points...) - savepng(fmt.Sprintf("_testRec%d.png", i), img) - log.Printf("Num of points: %d\n", len(p.points)) - } - fmt.Println() -} - -func TestCubicCurve(t *testing.T) { - for i, curve := range testsCubicFloat64 { - var p Path - p.LineTo(curve[0], curve[1]) - curve.Segment(&p, flattening_threshold) - img := image.NewNRGBA(image.Rect(0, 0, 300, 300)) - raster.PolylineBresenham(img, color.NRGBA{0xff, 0, 0, 0xff}, curve[:]...) - raster.PolylineBresenham(img, image.Black, p.points...) - //drawPoints(img, image.NRGBAColor{0, 0, 0, 0xff}, curve[:]...) - drawPoints(img, color.NRGBA{0, 0, 0, 0xff}, p.points...) - savepng(fmt.Sprintf("_test%d.png", i), img) - log.Printf("Num of points: %d\n", len(p.points)) - } - fmt.Println() -} - -func TestCubicCurveAdaptiveRec(t *testing.T) { - for i, curve := range testsCubicFloat64 { - var p Path - p.LineTo(curve[0], curve[1]) - curve.AdaptiveSegmentRec(&p, 1, 0, 0) - img := image.NewNRGBA(image.Rect(0, 0, 300, 300)) - raster.PolylineBresenham(img, color.NRGBA{0xff, 0, 0, 0xff}, curve[:]...) - raster.PolylineBresenham(img, image.Black, p.points...) - //drawPoints(img, image.NRGBAColor{0, 0, 0, 0xff}, curve[:]...) - drawPoints(img, color.NRGBA{0, 0, 0, 0xff}, p.points...) - savepng(fmt.Sprintf("_testAdaptiveRec%d.png", i), img) - log.Printf("Num of points: %d\n", len(p.points)) - } - fmt.Println() -} - -func TestCubicCurveAdaptive(t *testing.T) { - for i, curve := range testsCubicFloat64 { - var p Path - p.LineTo(curve[0], curve[1]) - curve.AdaptiveSegment(&p, 1, 0, 0) - img := image.NewNRGBA(image.Rect(0, 0, 300, 300)) - raster.PolylineBresenham(img, color.NRGBA{0xff, 0, 0, 0xff}, curve[:]...) - raster.PolylineBresenham(img, image.Black, p.points...) - //drawPoints(img, image.NRGBAColor{0, 0, 0, 0xff}, curve[:]...) - drawPoints(img, color.NRGBA{0, 0, 0, 0xff}, p.points...) - savepng(fmt.Sprintf("_testAdaptive%d.png", i), img) - log.Printf("Num of points: %d\n", len(p.points)) - } - fmt.Println() -} - -func TestCubicCurveParabolic(t *testing.T) { - for i, curve := range testsCubicFloat64 { - var p Path - p.LineTo(curve[0], curve[1]) - curve.ParabolicSegment(&p, flattening_threshold) - img := image.NewNRGBA(image.Rect(0, 0, 300, 300)) - raster.PolylineBresenham(img, color.NRGBA{0xff, 0, 0, 0xff}, curve[:]...) - raster.PolylineBresenham(img, image.Black, p.points...) - //drawPoints(img, image.NRGBAColor{0, 0, 0, 0xff}, curve[:]...) - drawPoints(img, color.NRGBA{0, 0, 0, 0xff}, p.points...) - savepng(fmt.Sprintf("_testParabolic%d.png", i), img) - log.Printf("Num of points: %d\n", len(p.points)) - } - fmt.Println() -} - -func TestQuadCurve(t *testing.T) { - for i, curve := range testsQuadFloat64 { - var p Path - p.LineTo(curve[0], curve[1]) - curve.Segment(&p, flattening_threshold) - img := image.NewNRGBA(image.Rect(0, 0, 300, 300)) - raster.PolylineBresenham(img, color.NRGBA{0xff, 0, 0, 0xff}, curve[:]...) - raster.PolylineBresenham(img, image.Black, p.points...) - //drawPoints(img, image.NRGBAColor{0, 0, 0, 0xff}, curve[:]...) - drawPoints(img, color.NRGBA{0, 0, 0, 0xff}, p.points...) - savepng(fmt.Sprintf("_testQuad%d.png", i), img) - log.Printf("Num of points: %d\n", len(p.points)) - } - fmt.Println() -} - -func BenchmarkCubicCurveRec(b *testing.B) { - for i := 0; i < b.N; i++ { - for _, curve := range testsCubicFloat64 { - p := Path{make([]float64, 0, 32)} - p.LineTo(curve[0], curve[1]) - curve.SegmentRec(&p, flattening_threshold) - } - } -} - -func BenchmarkCubicCurve(b *testing.B) { - for i := 0; i < b.N; i++ { - for _, curve := range testsCubicFloat64 { - p := Path{make([]float64, 0, 32)} - p.LineTo(curve[0], curve[1]) - curve.Segment(&p, flattening_threshold) - } - } -} - -func BenchmarkCubicCurveAdaptiveRec(b *testing.B) { - for i := 0; i < b.N; i++ { - for _, curve := range testsCubicFloat64 { - p := Path{make([]float64, 0, 32)} - p.LineTo(curve[0], curve[1]) - curve.AdaptiveSegmentRec(&p, 1, 0, 0) - } - } -} - -func BenchmarkCubicCurveAdaptive(b *testing.B) { - for i := 0; i < b.N; i++ { - for _, curve := range testsCubicFloat64 { - p := Path{make([]float64, 0, 32)} - p.LineTo(curve[0], curve[1]) - curve.AdaptiveSegment(&p, 1, 0, 0) - } - } -} - -func BenchmarkCubicCurveParabolic(b *testing.B) { - for i := 0; i < b.N; i++ { - for _, curve := range testsCubicFloat64 { - p := Path{make([]float64, 0, 32)} - p.LineTo(curve[0], curve[1]) - curve.ParabolicSegment(&p, flattening_threshold) - } - } -} - -func BenchmarkQuadCurve(b *testing.B) { - for i := 0; i < b.N; i++ { - for _, curve := range testsQuadFloat64 { - p := Path{make([]float64, 0, 32)} - p.LineTo(curve[0], curve[1]) - curve.Segment(&p, flattening_threshold) - } - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/quad_float64.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/quad_float64.go deleted file mode 100644 index bd72affbb..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curve/quad_float64.go +++ /dev/null @@ -1,51 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 17/05/2011 by Laurent Le Goff -package curve - -import ( - "math" -) - -//X1, Y1, X2, Y2, X3, Y3 float64 -type QuadCurveFloat64 [6]float64 - -func (c *QuadCurveFloat64) Subdivide(c1, c2 *QuadCurveFloat64) { - // Calculate all the mid-points of the line segments - //---------------------- - c1[0], c1[1] = c[0], c[1] - c2[4], c2[5] = c[4], c[5] - c1[2] = (c[0] + c[2]) / 2 - c1[3] = (c[1] + c[3]) / 2 - c2[2] = (c[2] + c[4]) / 2 - c2[3] = (c[3] + c[5]) / 2 - c1[4] = (c1[2] + c2[2]) / 2 - c1[5] = (c1[3] + c2[3]) / 2 - c2[0], c2[1] = c1[4], c1[5] - return -} - -func (curve *QuadCurveFloat64) Segment(t LineTracer, flattening_threshold float64) { - var curves [CurveRecursionLimit]QuadCurveFloat64 - curves[0] = *curve - i := 0 - // current curve - var c *QuadCurveFloat64 - var dx, dy, d float64 - - for i >= 0 { - c = &curves[i] - dx = c[4] - c[0] - dy = c[5] - c[1] - - d = math.Abs(((c[2]-c[4])*dy - (c[3]-c[5])*dx)) - - if (d*d) < flattening_threshold*(dx*dx+dy*dy) || i == len(curves)-1 { - t.LineTo(c[4], c[5]) - i-- - } else { - // second half of bezier go lower onto the stack - c.Subdivide(&curves[i+1], &curves[i]) - i++ - } - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curves.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curves.go deleted file mode 100644 index 4623cd4dc..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/curves.go +++ /dev/null @@ -1,336 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff - -package draw2d - -import ( - "math" -) - -var ( - CurveRecursionLimit = 32 - CurveCollinearityEpsilon = 1e-30 - CurveAngleToleranceEpsilon = 0.01 -) - -/* - The function has the following parameters: - approximationScale : - Eventually determines the approximation accuracy. In practice we need to transform points from the World coordinate system to the Screen one. - It always has some scaling coefficient. - The curves are usually processed in the World coordinates, while the approximation accuracy should be eventually in pixels. - Usually it looks as follows: - curved.approximationScale(transform.scale()); - where transform is the affine matrix that includes all the transformations, including viewport and zoom. - angleTolerance : - You set it in radians. - The less this value is the more accurate will be the approximation at sharp turns. - But 0 means that we don't consider angle conditions at all. - cuspLimit : - An angle in radians. - If 0, only the real cusps will have bevel cuts. - If more than 0, it will restrict the sharpness. - The more this value is the less sharp turns will be cut. - Typically it should not exceed 10-15 degrees. -*/ -func cubicBezier(v VertexConverter, x1, y1, x2, y2, x3, y3, x4, y4, approximationScale, angleTolerance, cuspLimit float64) { - cuspLimit = computeCuspLimit(cuspLimit) - distanceToleranceSquare := 0.5 / approximationScale - distanceToleranceSquare = distanceToleranceSquare * distanceToleranceSquare - recursiveCubicBezier(v, x1, y1, x2, y2, x3, y3, x4, y4, 0, distanceToleranceSquare, angleTolerance, cuspLimit) -} - -/* - * see cubicBezier comments for approximationScale and angleTolerance definition - */ -func quadraticBezier(v VertexConverter, x1, y1, x2, y2, x3, y3, approximationScale, angleTolerance float64) { - distanceToleranceSquare := 0.5 / approximationScale - distanceToleranceSquare = distanceToleranceSquare * distanceToleranceSquare - - recursiveQuadraticBezierBezier(v, x1, y1, x2, y2, x3, y3, 0, distanceToleranceSquare, angleTolerance) -} - -func computeCuspLimit(v float64) (r float64) { - if v == 0.0 { - r = 0.0 - } else { - r = math.Pi - v - } - return -} - -/** - * http://www.antigrain.com/research/adaptive_bezier/index.html - */ -func recursiveQuadraticBezierBezier(v VertexConverter, x1, y1, x2, y2, x3, y3 float64, level int, distanceToleranceSquare, angleTolerance float64) { - if level > CurveRecursionLimit { - return - } - - // Calculate all the mid-points of the line segments - //---------------------- - x12 := (x1 + x2) / 2 - y12 := (y1 + y2) / 2 - x23 := (x2 + x3) / 2 - y23 := (y2 + y3) / 2 - x123 := (x12 + x23) / 2 - y123 := (y12 + y23) / 2 - - dx := x3 - x1 - dy := y3 - y1 - d := math.Abs(((x2-x3)*dy - (y2-y3)*dx)) - - if d > CurveCollinearityEpsilon { - // Regular case - //----------------- - if d*d <= distanceToleranceSquare*(dx*dx+dy*dy) { - // If the curvature doesn't exceed the distanceTolerance value - // we tend to finish subdivisions. - //---------------------- - if angleTolerance < CurveAngleToleranceEpsilon { - v.Vertex(x123, y123) - return - } - - // Angle & Cusp Condition - //---------------------- - da := math.Abs(math.Atan2(y3-y2, x3-x2) - math.Atan2(y2-y1, x2-x1)) - if da >= math.Pi { - da = 2*math.Pi - da - } - - if da < angleTolerance { - // Finally we can stop the recursion - //---------------------- - v.Vertex(x123, y123) - return - } - } - } else { - // Collinear case - //------------------ - da := dx*dx + dy*dy - if da == 0 { - d = squareDistance(x1, y1, x2, y2) - } else { - d = ((x2-x1)*dx + (y2-y1)*dy) / da - if d > 0 && d < 1 { - // Simple collinear case, 1---2---3 - // We can leave just two endpoints - return - } - if d <= 0 { - d = squareDistance(x2, y2, x1, y1) - } else if d >= 1 { - d = squareDistance(x2, y2, x3, y3) - } else { - d = squareDistance(x2, y2, x1+d*dx, y1+d*dy) - } - } - if d < distanceToleranceSquare { - v.Vertex(x2, y2) - return - } - } - - // Continue subdivision - //---------------------- - recursiveQuadraticBezierBezier(v, x1, y1, x12, y12, x123, y123, level+1, distanceToleranceSquare, angleTolerance) - recursiveQuadraticBezierBezier(v, x123, y123, x23, y23, x3, y3, level+1, distanceToleranceSquare, angleTolerance) -} - -/** - * http://www.antigrain.com/research/adaptive_bezier/index.html - */ -func recursiveCubicBezier(v VertexConverter, x1, y1, x2, y2, x3, y3, x4, y4 float64, level int, distanceToleranceSquare, angleTolerance, cuspLimit float64) { - if level > CurveRecursionLimit { - return - } - - // Calculate all the mid-points of the line segments - //---------------------- - x12 := (x1 + x2) / 2 - y12 := (y1 + y2) / 2 - x23 := (x2 + x3) / 2 - y23 := (y2 + y3) / 2 - x34 := (x3 + x4) / 2 - y34 := (y3 + y4) / 2 - x123 := (x12 + x23) / 2 - y123 := (y12 + y23) / 2 - x234 := (x23 + x34) / 2 - y234 := (y23 + y34) / 2 - x1234 := (x123 + x234) / 2 - y1234 := (y123 + y234) / 2 - - // Try to approximate the full cubic curve by a single straight line - //------------------ - dx := x4 - x1 - dy := y4 - y1 - - d2 := math.Abs(((x2-x4)*dy - (y2-y4)*dx)) - d3 := math.Abs(((x3-x4)*dy - (y3-y4)*dx)) - - switch { - case d2 <= CurveCollinearityEpsilon && d3 <= CurveCollinearityEpsilon: - // All collinear OR p1==p4 - //---------------------- - k := dx*dx + dy*dy - if k == 0 { - d2 = squareDistance(x1, y1, x2, y2) - d3 = squareDistance(x4, y4, x3, y3) - } else { - k = 1 / k - da1 := x2 - x1 - da2 := y2 - y1 - d2 = k * (da1*dx + da2*dy) - da1 = x3 - x1 - da2 = y3 - y1 - d3 = k * (da1*dx + da2*dy) - if d2 > 0 && d2 < 1 && d3 > 0 && d3 < 1 { - // Simple collinear case, 1---2---3---4 - // We can leave just two endpoints - return - } - if d2 <= 0 { - d2 = squareDistance(x2, y2, x1, y1) - } else if d2 >= 1 { - d2 = squareDistance(x2, y2, x4, y4) - } else { - d2 = squareDistance(x2, y2, x1+d2*dx, y1+d2*dy) - } - - if d3 <= 0 { - d3 = squareDistance(x3, y3, x1, y1) - } else if d3 >= 1 { - d3 = squareDistance(x3, y3, x4, y4) - } else { - d3 = squareDistance(x3, y3, x1+d3*dx, y1+d3*dy) - } - } - if d2 > d3 { - if d2 < distanceToleranceSquare { - v.Vertex(x2, y2) - return - } - } else { - if d3 < distanceToleranceSquare { - v.Vertex(x3, y3) - return - } - } - break - - case d2 <= CurveCollinearityEpsilon && d3 > CurveCollinearityEpsilon: - // p1,p2,p4 are collinear, p3 is significant - //---------------------- - if d3*d3 <= distanceToleranceSquare*(dx*dx+dy*dy) { - if angleTolerance < CurveAngleToleranceEpsilon { - v.Vertex(x23, y23) - return - } - - // Angle Condition - //---------------------- - da1 := math.Abs(math.Atan2(y4-y3, x4-x3) - math.Atan2(y3-y2, x3-x2)) - if da1 >= math.Pi { - da1 = 2*math.Pi - da1 - } - - if da1 < angleTolerance { - v.Vertex(x2, y2) - v.Vertex(x3, y3) - return - } - - if cuspLimit != 0.0 { - if da1 > cuspLimit { - v.Vertex(x3, y3) - return - } - } - } - break - - case d2 > CurveCollinearityEpsilon && d3 <= CurveCollinearityEpsilon: - // p1,p3,p4 are collinear, p2 is significant - //---------------------- - if d2*d2 <= distanceToleranceSquare*(dx*dx+dy*dy) { - if angleTolerance < CurveAngleToleranceEpsilon { - v.Vertex(x23, y23) - return - } - - // Angle Condition - //---------------------- - da1 := math.Abs(math.Atan2(y3-y2, x3-x2) - math.Atan2(y2-y1, x2-x1)) - if da1 >= math.Pi { - da1 = 2*math.Pi - da1 - } - - if da1 < angleTolerance { - v.Vertex(x2, y2) - v.Vertex(x3, y3) - return - } - - if cuspLimit != 0.0 { - if da1 > cuspLimit { - v.Vertex(x2, y2) - return - } - } - } - break - - case d2 > CurveCollinearityEpsilon && d3 > CurveCollinearityEpsilon: - // Regular case - //----------------- - if (d2+d3)*(d2+d3) <= distanceToleranceSquare*(dx*dx+dy*dy) { - // If the curvature doesn't exceed the distanceTolerance value - // we tend to finish subdivisions. - //---------------------- - if angleTolerance < CurveAngleToleranceEpsilon { - v.Vertex(x23, y23) - return - } - - // Angle & Cusp Condition - //---------------------- - k := math.Atan2(y3-y2, x3-x2) - da1 := math.Abs(k - math.Atan2(y2-y1, x2-x1)) - da2 := math.Abs(math.Atan2(y4-y3, x4-x3) - k) - if da1 >= math.Pi { - da1 = 2*math.Pi - da1 - } - if da2 >= math.Pi { - da2 = 2*math.Pi - da2 - } - - if da1+da2 < angleTolerance { - // Finally we can stop the recursion - //---------------------- - v.Vertex(x23, y23) - return - } - - if cuspLimit != 0.0 { - if da1 > cuspLimit { - v.Vertex(x2, y2) - return - } - - if da2 > cuspLimit { - v.Vertex(x3, y3) - return - } - } - } - break - } - - // Continue subdivision - //---------------------- - recursiveCubicBezier(v, x1, y1, x12, y12, x123, y123, x1234, y1234, level+1, distanceToleranceSquare, angleTolerance, cuspLimit) - recursiveCubicBezier(v, x1234, y1234, x234, y234, x34, y34, x4, y4, level+1, distanceToleranceSquare, angleTolerance, cuspLimit) - -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/dasher.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/dasher.go deleted file mode 100644 index 521029992..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/dasher.go +++ /dev/null @@ -1,90 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 13/12/2010 by Laurent Le Goff - -package draw2d - -type DashVertexConverter struct { - command VertexCommand - next VertexConverter - x, y, distance float64 - dash []float64 - currentDash int - dashOffset float64 -} - -func NewDashConverter(dash []float64, dashOffset float64, converter VertexConverter) *DashVertexConverter { - var dasher DashVertexConverter - dasher.dash = dash - dasher.currentDash = 0 - dasher.dashOffset = dashOffset - dasher.next = converter - return &dasher -} - -func (dasher *DashVertexConverter) NextCommand(cmd VertexCommand) { - dasher.command = cmd - if dasher.command == VertexStopCommand { - dasher.next.NextCommand(VertexStopCommand) - } -} - -func (dasher *DashVertexConverter) Vertex(x, y float64) { - switch dasher.command { - case VertexStartCommand: - dasher.start(x, y) - default: - dasher.lineTo(x, y) - } - dasher.command = VertexNoCommand -} - -func (dasher *DashVertexConverter) start(x, y float64) { - dasher.next.NextCommand(VertexStartCommand) - dasher.next.Vertex(x, y) - dasher.x, dasher.y = x, y - dasher.distance = dasher.dashOffset - dasher.currentDash = 0 -} - -func (dasher *DashVertexConverter) lineTo(x, y float64) { - rest := dasher.dash[dasher.currentDash] - dasher.distance - for rest < 0 { - dasher.distance = dasher.distance - dasher.dash[dasher.currentDash] - dasher.currentDash = (dasher.currentDash + 1) % len(dasher.dash) - rest = dasher.dash[dasher.currentDash] - dasher.distance - } - d := distance(dasher.x, dasher.y, x, y) - for d >= rest { - k := rest / d - lx := dasher.x + k*(x-dasher.x) - ly := dasher.y + k*(y-dasher.y) - if dasher.currentDash%2 == 0 { - // line - dasher.next.Vertex(lx, ly) - } else { - // gap - dasher.next.NextCommand(VertexStopCommand) - dasher.next.NextCommand(VertexStartCommand) - dasher.next.Vertex(lx, ly) - } - d = d - rest - dasher.x, dasher.y = lx, ly - dasher.currentDash = (dasher.currentDash + 1) % len(dasher.dash) - rest = dasher.dash[dasher.currentDash] - } - dasher.distance = d - if dasher.currentDash%2 == 0 { - // line - dasher.next.Vertex(x, y) - } else { - // gap - dasher.next.NextCommand(VertexStopCommand) - dasher.next.NextCommand(VertexStartCommand) - dasher.next.Vertex(x, y) - } - if dasher.distance >= dasher.dash[dasher.currentDash] { - dasher.distance = dasher.distance - dasher.dash[dasher.currentDash] - dasher.currentDash = (dasher.currentDash + 1) % len(dasher.dash) - } - dasher.x, dasher.y = x, y -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/demux_converter.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/demux_converter.go deleted file mode 100644 index b5c871d2c..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/demux_converter.go +++ /dev/null @@ -1,23 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 13/12/2010 by Laurent Le Goff - -package draw2d - -type DemuxConverter struct { - converters []VertexConverter -} - -func NewDemuxConverter(converters ...VertexConverter) *DemuxConverter { - return &DemuxConverter{converters} -} - -func (dc *DemuxConverter) NextCommand(cmd VertexCommand) { - for _, converter := range dc.converters { - converter.NextCommand(cmd) - } -} -func (dc *DemuxConverter) Vertex(x, y float64) { - for _, converter := range dc.converters { - converter.Vertex(x, y) - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/doc.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/doc.go deleted file mode 100644 index 3baeffb4d..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/doc.go +++ /dev/null @@ -1,5 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 13/12/2010 by Laurent Le Goff - -// The package draw2d provide a Graphic Context that can draw vectorial figure on surface. -package draw2d diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/font.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/font.go deleted file mode 100644 index eb0b5325c..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/font.go +++ /dev/null @@ -1,97 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 13/12/2010 by Laurent Le Goff - -package draw2d - -import ( - "code.google.com/p/freetype-go/freetype/truetype" - "io/ioutil" - "log" - "path" -) - -var ( - fontFolder = "../resource/font/" - fonts = make(map[string]*truetype.Font) -) - -type FontStyle byte - -const ( - FontStyleNormal FontStyle = iota - FontStyleBold - FontStyleItalic -) - -type FontFamily byte - -const ( - FontFamilySans FontFamily = iota - FontFamilySerif - FontFamilyMono -) - -type FontData struct { - Name string - Family FontFamily - Style FontStyle -} - -func fontFileName(fontData FontData) string { - fontFileName := fontData.Name - switch fontData.Family { - case FontFamilySans: - fontFileName += "s" - case FontFamilySerif: - fontFileName += "r" - case FontFamilyMono: - fontFileName += "m" - } - if fontData.Style&FontStyleBold != 0 { - fontFileName += "b" - } else { - fontFileName += "r" - } - - if fontData.Style&FontStyleItalic != 0 { - fontFileName += "i" - } - fontFileName += ".ttf" - return fontFileName -} - -func RegisterFont(fontData FontData, font *truetype.Font) { - fonts[fontFileName(fontData)] = font -} - -func GetFont(fontData FontData) *truetype.Font { - fontFileName := fontFileName(fontData) - font := fonts[fontFileName] - if font != nil { - return font - } - fonts[fontFileName] = loadFont(fontFileName) - return fonts[fontFileName] -} - -func GetFontFolder() string { - return fontFolder -} - -func SetFontFolder(folder string) { - fontFolder = folder -} - -func loadFont(fontFileName string) *truetype.Font { - fontBytes, err := ioutil.ReadFile(path.Join(fontFolder, fontFileName)) - if err != nil { - log.Println(err) - return nil - } - font, err := truetype.Parse(fontBytes) - if err != nil { - log.Println(err) - return nil - } - return font -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/gc.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/gc.go deleted file mode 100644 index 66dc5088f..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/gc.go +++ /dev/null @@ -1,55 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff - -package draw2d - -import ( - "image" - "image/color" -) - -type FillRule int - -const ( - FillRuleEvenOdd FillRule = iota - FillRuleWinding -) - -type GraphicContext interface { - Path - // Create a new path - BeginPath() - GetMatrixTransform() MatrixTransform - SetMatrixTransform(tr MatrixTransform) - ComposeMatrixTransform(tr MatrixTransform) - Rotate(angle float64) - Translate(tx, ty float64) - Scale(sx, sy float64) - SetStrokeColor(c color.Color) - SetFillColor(c color.Color) - SetFillRule(f FillRule) - SetLineWidth(lineWidth float64) - SetLineCap(cap Cap) - SetLineJoin(join Join) - SetLineDash(dash []float64, dashOffset float64) - SetFontSize(fontSize float64) - GetFontSize() float64 - SetFontData(fontData FontData) - GetFontData() FontData - DrawImage(image image.Image) - Save() - Restore() - Clear() - ClearRect(x1, y1, x2, y2 int) - SetDPI(dpi int) - GetDPI() int - GetStringBounds(s string) (left, top, right, bottom float64) - CreateStringPath(text string, x, y float64) (cursor float64) - FillString(text string) (cursor float64) - FillStringAt(text string, x, y float64) (cursor float64) - StrokeString(text string) (cursor float64) - StrokeStringAt(text string, x, y float64) (cursor float64) - Stroke(paths ...*PathStorage) - Fill(paths ...*PathStorage) - FillStroke(paths ...*PathStorage) -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/image.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/image.go deleted file mode 100644 index 9f91bc71f..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/image.go +++ /dev/null @@ -1,359 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff - -package draw2d - -import ( - "code.google.com/p/freetype-go/freetype/raster" - "code.google.com/p/freetype-go/freetype/truetype" - "errors" - "image" - "image/color" - "image/draw" - "log" - "math" -) - -type Painter interface { - raster.Painter - SetColor(color color.Color) -} - -var ( - defaultFontData = FontData{"luxi", FontFamilySans, FontStyleNormal} -) - -type ImageGraphicContext struct { - *StackGraphicContext - img draw.Image - painter Painter - fillRasterizer *raster.Rasterizer - strokeRasterizer *raster.Rasterizer - glyphBuf *truetype.GlyphBuf - DPI int -} - -/** - * Create a new Graphic context from an image - */ -func NewGraphicContext(img draw.Image) *ImageGraphicContext { - var painter Painter - switch selectImage := img.(type) { - case *image.RGBA: - painter = raster.NewRGBAPainter(selectImage) - default: - panic("Image type not supported") - } - return NewGraphicContextWithPainter(img, painter) -} - -// Create a new Graphic context from an image and a Painter (see Freetype-go) -func NewGraphicContextWithPainter(img draw.Image, painter Painter) *ImageGraphicContext { - width, height := img.Bounds().Dx(), img.Bounds().Dy() - dpi := 92 - gc := &ImageGraphicContext{ - NewStackGraphicContext(), - img, - painter, - raster.NewRasterizer(width, height), - raster.NewRasterizer(width, height), - truetype.NewGlyphBuf(), - dpi, - } - return gc -} - -func (gc *ImageGraphicContext) GetDPI() int { - return gc.DPI -} - -func (gc *ImageGraphicContext) Clear() { - width, height := gc.img.Bounds().Dx(), gc.img.Bounds().Dy() - gc.ClearRect(0, 0, width, height) -} - -func (gc *ImageGraphicContext) ClearRect(x1, y1, x2, y2 int) { - imageColor := image.NewUniform(gc.Current.FillColor) - draw.Draw(gc.img, image.Rect(x1, y1, x2, y2), imageColor, image.ZP, draw.Over) -} - -func (gc *ImageGraphicContext) DrawImage(img image.Image) { - DrawImage(img, gc.img, gc.Current.Tr, draw.Over, BilinearFilter) -} - -func (gc *ImageGraphicContext) FillString(text string) (cursor float64) { - return gc.FillStringAt(text, 0, 0) -} - -func (gc *ImageGraphicContext) FillStringAt(text string, x, y float64) (cursor float64) { - width := gc.CreateStringPath(text, x, y) - gc.Fill() - return width -} - -func (gc *ImageGraphicContext) StrokeString(text string) (cursor float64) { - return gc.StrokeStringAt(text, 0, 0) -} - -func (gc *ImageGraphicContext) StrokeStringAt(text string, x, y float64) (cursor float64) { - width := gc.CreateStringPath(text, x, y) - gc.Stroke() - return width -} - -func (gc *ImageGraphicContext) loadCurrentFont() (*truetype.Font, error) { - font := GetFont(gc.Current.FontData) - if font == nil { - font = GetFont(defaultFontData) - } - if font == nil { - return nil, errors.New("No font set, and no default font available.") - } - gc.SetFont(font) - gc.SetFontSize(gc.Current.FontSize) - return font, nil -} - -func fUnitsToFloat64(x int32) float64 { - scaled := x << 2 - return float64(scaled/256) + float64(scaled%256)/256.0 -} - -// p is a truetype.Point measured in FUnits and positive Y going upwards. -// The returned value is the same thing measured in floating point and positive Y -// going downwards. -func pointToF64Point(p truetype.Point) (x, y float64) { - return fUnitsToFloat64(p.X), -fUnitsToFloat64(p.Y) -} - -// drawContour draws the given closed contour at the given sub-pixel offset. -func (gc *ImageGraphicContext) drawContour(ps []truetype.Point, dx, dy float64) { - if len(ps) == 0 { - return - } - startX, startY := pointToF64Point(ps[0]) - gc.MoveTo(startX+dx, startY+dy) - q0X, q0Y, on0 := startX, startY, true - for _, p := range ps[1:] { - qX, qY := pointToF64Point(p) - on := p.Flags&0x01 != 0 - if on { - if on0 { - gc.LineTo(qX+dx, qY+dy) - } else { - gc.QuadCurveTo(q0X+dx, q0Y+dy, qX+dx, qY+dy) - } - } else { - if on0 { - // No-op. - } else { - midX := (q0X + qX) / 2 - midY := (q0Y + qY) / 2 - gc.QuadCurveTo(q0X+dx, q0Y+dy, midX+dx, midY+dy) - } - } - q0X, q0Y, on0 = qX, qY, on - } - // Close the curve. - if on0 { - gc.LineTo(startX+dx, startY+dy) - } else { - gc.QuadCurveTo(q0X+dx, q0Y+dy, startX+dx, startY+dy) - } -} - -func (gc *ImageGraphicContext) drawGlyph(glyph truetype.Index, dx, dy float64) error { - if err := gc.glyphBuf.Load(gc.Current.font, gc.Current.scale, glyph, truetype.NoHinting); err != nil { - return err - } - e0 := 0 - for _, e1 := range gc.glyphBuf.End { - gc.drawContour(gc.glyphBuf.Point[e0:e1], dx, dy) - e0 = e1 - } - return nil -} - -// CreateStringPath creates a path from the string s at x, y, and returns the string width. -// The text is placed so that the left edge of the em square of the first character of s -// and the baseline intersect at x, y. The majority of the affected pixels will be -// above and to the right of the point, but some may be below or to the left. -// For example, drawing a string that starts with a 'J' in an italic font may -// affect pixels below and left of the point. -func (gc *ImageGraphicContext) CreateStringPath(s string, x, y float64) float64 { - font, err := gc.loadCurrentFont() - if err != nil { - log.Println(err) - return 0.0 - } - startx := x - prev, hasPrev := truetype.Index(0), false - for _, rune := range s { - index := font.Index(rune) - if hasPrev { - x += fUnitsToFloat64(font.Kerning(gc.Current.scale, prev, index)) - } - err := gc.drawGlyph(index, x, y) - if err != nil { - log.Println(err) - return startx - x - } - x += fUnitsToFloat64(font.HMetric(gc.Current.scale, index).AdvanceWidth) - prev, hasPrev = index, true - } - return x - startx -} - -// GetStringBounds returns the approximate pixel bounds of the string s at x, y. -// The the left edge of the em square of the first character of s -// and the baseline intersect at 0, 0 in the returned coordinates. -// Therefore the top and left coordinates may well be negative. -func (gc *ImageGraphicContext) GetStringBounds(s string) (left, top, right, bottom float64) { - font, err := gc.loadCurrentFont() - if err != nil { - log.Println(err) - return 0, 0, 0, 0 - } - top, left, bottom, right = 10e6, 10e6, -10e6, -10e6 - cursor := 0.0 - prev, hasPrev := truetype.Index(0), false - for _, rune := range s { - index := font.Index(rune) - if hasPrev { - cursor += fUnitsToFloat64(font.Kerning(gc.Current.scale, prev, index)) - } - if err := gc.glyphBuf.Load(gc.Current.font, gc.Current.scale, index, truetype.NoHinting); err != nil { - log.Println(err) - return 0, 0, 0, 0 - } - e0 := 0 - for _, e1 := range gc.glyphBuf.End { - ps := gc.glyphBuf.Point[e0:e1] - for _, p := range ps { - x, y := pointToF64Point(p) - top = math.Min(top, y) - bottom = math.Max(bottom, y) - left = math.Min(left, x+cursor) - right = math.Max(right, x+cursor) - } - } - cursor += fUnitsToFloat64(font.HMetric(gc.Current.scale, index).AdvanceWidth) - prev, hasPrev = index, true - } - return left, top, right, bottom -} - -// recalc recalculates scale and bounds values from the font size, screen -// resolution and font metrics, and invalidates the glyph cache. -func (gc *ImageGraphicContext) recalc() { - gc.Current.scale = int32(gc.Current.FontSize * float64(gc.DPI) * (64.0 / 72.0)) -} - -// SetDPI sets the screen resolution in dots per inch. -func (gc *ImageGraphicContext) SetDPI(dpi int) { - gc.DPI = dpi - gc.recalc() -} - -// SetFont sets the font used to draw text. -func (gc *ImageGraphicContext) SetFont(font *truetype.Font) { - gc.Current.font = font -} - -// SetFontSize sets the font size in points (as in ``a 12 point font''). -func (gc *ImageGraphicContext) SetFontSize(fontSize float64) { - gc.Current.FontSize = fontSize - gc.recalc() -} - -func (gc *ImageGraphicContext) paint(rasterizer *raster.Rasterizer, color color.Color) { - gc.painter.SetColor(color) - rasterizer.Rasterize(gc.painter) - rasterizer.Clear() - gc.Current.Path.Clear() -} - -/**** second method ****/ -func (gc *ImageGraphicContext) Stroke(paths ...*PathStorage) { - paths = append(paths, gc.Current.Path) - gc.strokeRasterizer.UseNonZeroWinding = true - - stroker := NewLineStroker(gc.Current.Cap, gc.Current.Join, NewVertexMatrixTransform(gc.Current.Tr, NewVertexAdder(gc.strokeRasterizer))) - stroker.HalfLineWidth = gc.Current.LineWidth / 2 - var pathConverter *PathConverter - if gc.Current.Dash != nil && len(gc.Current.Dash) > 0 { - dasher := NewDashConverter(gc.Current.Dash, gc.Current.DashOffset, stroker) - pathConverter = NewPathConverter(dasher) - } else { - pathConverter = NewPathConverter(stroker) - } - pathConverter.ApproximationScale = gc.Current.Tr.GetScale() - pathConverter.Convert(paths...) - - gc.paint(gc.strokeRasterizer, gc.Current.StrokeColor) -} - -/**** second method ****/ -func (gc *ImageGraphicContext) Fill(paths ...*PathStorage) { - paths = append(paths, gc.Current.Path) - gc.fillRasterizer.UseNonZeroWinding = gc.Current.FillRule.UseNonZeroWinding() - - /**** first method ****/ - pathConverter := NewPathConverter(NewVertexMatrixTransform(gc.Current.Tr, NewVertexAdder(gc.fillRasterizer))) - pathConverter.ApproximationScale = gc.Current.Tr.GetScale() - pathConverter.Convert(paths...) - - gc.paint(gc.fillRasterizer, gc.Current.FillColor) -} - -/* second method */ -func (gc *ImageGraphicContext) FillStroke(paths ...*PathStorage) { - gc.fillRasterizer.UseNonZeroWinding = gc.Current.FillRule.UseNonZeroWinding() - gc.strokeRasterizer.UseNonZeroWinding = true - - filler := NewVertexMatrixTransform(gc.Current.Tr, NewVertexAdder(gc.fillRasterizer)) - - stroker := NewLineStroker(gc.Current.Cap, gc.Current.Join, NewVertexMatrixTransform(gc.Current.Tr, NewVertexAdder(gc.strokeRasterizer))) - stroker.HalfLineWidth = gc.Current.LineWidth / 2 - - demux := NewDemuxConverter(filler, stroker) - paths = append(paths, gc.Current.Path) - pathConverter := NewPathConverter(demux) - pathConverter.ApproximationScale = gc.Current.Tr.GetScale() - pathConverter.Convert(paths...) - - gc.paint(gc.fillRasterizer, gc.Current.FillColor) - gc.paint(gc.strokeRasterizer, gc.Current.StrokeColor) -} - -func (f FillRule) UseNonZeroWinding() bool { - switch f { - case FillRuleEvenOdd: - return false - case FillRuleWinding: - return true - } - return false -} - -func (c Cap) Convert() raster.Capper { - switch c { - case RoundCap: - return raster.RoundCapper - case ButtCap: - return raster.ButtCapper - case SquareCap: - return raster.SquareCapper - } - return raster.RoundCapper -} - -func (j Join) Convert() raster.Joiner { - switch j { - case RoundJoin: - return raster.RoundJoiner - case BevelJoin: - return raster.BevelJoiner - } - return raster.RoundJoiner -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/math.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/math.go deleted file mode 100644 index c4bb761df..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/math.go +++ /dev/null @@ -1,52 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff - -package draw2d - -import ( - "math" -) - -func distance(x1, y1, x2, y2 float64) float64 { - dx := x2 - x1 - dy := y2 - y1 - return float64(math.Sqrt(dx*dx + dy*dy)) -} - -func vectorDistance(dx, dy float64) float64 { - return float64(math.Sqrt(dx*dx + dy*dy)) -} - -func squareDistance(x1, y1, x2, y2 float64) float64 { - dx := x2 - x1 - dy := y2 - y1 - return dx*dx + dy*dy -} - -func min(x, y float64) float64 { - if x < y { - return x - } - return y -} - -func max(x, y float64) float64 { - if x > y { - return x - } - return y -} - -func minMax(x, y float64) (min, max float64) { - if x > y { - return y, x - } - return x, y -} - -func minUint32(a, b uint32) uint32 { - if a < b { - return a - } - return b -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/paint.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/paint.go deleted file mode 100644 index 885d993ae..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/paint.go +++ /dev/null @@ -1,92 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff - -package draw2d - -/* -import ( - "image/draw" - "image" - "freetype-go.googlecode.com/hg/freetype/raster" -)*/ - -const M = 1<<16 - 1 - -/* -type NRGBAPainter struct { - // The image to compose onto. - Image *image.NRGBA - // The Porter-Duff composition operator. - Op draw.Op - // The 16-bit color to paint the spans. - cr, cg, cb, ca uint32 -} - -// Paint satisfies the Painter interface by painting ss onto an image.RGBA. -func (r *NRGBAPainter) Paint(ss []raster.Span, done bool) { - b := r.Image.Bounds() - for _, s := range ss { - if s.Y < b.Min.Y { - continue - } - if s.Y >= b.Max.Y { - return - } - if s.X0 < b.Min.X { - s.X0 = b.Min.X - } - if s.X1 > b.Max.X { - s.X1 = b.Max.X - } - if s.X0 >= s.X1 { - continue - } - base := s.Y * r.Image.Stride - p := r.Image.Pix[base+s.X0 : base+s.X1] - // This code is duplicated from drawGlyphOver in $GOROOT/src/pkg/image/draw/draw.go. - // TODO(nigeltao): Factor out common code into a utility function, once the compiler - // can inline such function calls. - ma := s.A >> 16 - if r.Op == draw.Over { - for i, nrgba := range p { - dr, dg, db, da := nrgba. - a := M - (r.ca*ma)/M - da = (da*a + r.ca*ma) / M - if da != 0 { - dr = minUint32(M, (dr*a+r.cr*ma)/da) - dg = minUint32(M, (dg*a+r.cg*ma)/da) - db = minUint32(M, (db*a+r.cb*ma)/da) - } else { - dr, dg, db = 0, 0, 0 - } - p[i] = image.NRGBAColor{uint8(dr >> 8), uint8(dg >> 8), uint8(db >> 8), uint8(da >> 8)} - } - } else { - for i, nrgba := range p { - dr, dg, db, da := nrgba.RGBA() - a := M - ma - da = (da*a + r.ca*ma) / M - if da != 0 { - dr = minUint32(M, (dr*a+r.cr*ma)/da) - dg = minUint32(M, (dg*a+r.cg*ma)/da) - db = minUint32(M, (db*a+r.cb*ma)/da) - } else { - dr, dg, db = 0, 0, 0 - } - p[i] = image.NRGBAColor{uint8(dr >> 8), uint8(dg >> 8), uint8(db >> 8), uint8(da >> 8)} - } - } - } - -} - -// SetColor sets the color to paint the spans. -func (r *NRGBAPainter) SetColor(c image.Color) { - r.cr, r.cg, r.cb, r.ca = c.RGBA() -} - -// NewRGBAPainter creates a new RGBAPainter for the given image. -func NewNRGBAPainter(m *image.NRGBA) *NRGBAPainter { - return &NRGBAPainter{Image: m} -} -*/ diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/path.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/path.go deleted file mode 100644 index b82910e24..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/path.go +++ /dev/null @@ -1,27 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff - -package draw2d - -type Path interface { - // Return the current point of the path - LastPoint() (x, y float64) - // Create a new subpath that start at the specified point - MoveTo(x, y float64) - // Create a new subpath that start at the specified point - // relative to the current point - RMoveTo(dx, dy float64) - // Add a line to the current subpath - LineTo(x, y float64) - // Add a line to the current subpath - // relative to the current point - RLineTo(dx, dy float64) - - QuadCurveTo(cx, cy, x, y float64) - RQuadCurveTo(dcx, dcy, dx, dy float64) - CubicCurveTo(cx1, cy1, cx2, cy2, x, y float64) - RCubicCurveTo(dcx1, dcy1, dcx2, dcy2, dx, dy float64) - ArcTo(cx, cy, rx, ry, startAngle, angle float64) - RArcTo(dcx, dcy, rx, ry, startAngle, angle float64) - Close() -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/path_adder.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/path_adder.go deleted file mode 100644 index c5efd2beb..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/path_adder.go +++ /dev/null @@ -1,70 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 13/12/2010 by Laurent Le Goff - -package draw2d - -import ( - "code.google.com/p/freetype-go/freetype/raster" -) - -type VertexAdder struct { - command VertexCommand - adder raster.Adder -} - -func NewVertexAdder(adder raster.Adder) *VertexAdder { - return &VertexAdder{VertexNoCommand, adder} -} - -func (vertexAdder *VertexAdder) NextCommand(cmd VertexCommand) { - vertexAdder.command = cmd -} - -func (vertexAdder *VertexAdder) Vertex(x, y float64) { - switch vertexAdder.command { - case VertexStartCommand: - vertexAdder.adder.Start(raster.Point{raster.Fix32(x * 256), raster.Fix32(y * 256)}) - default: - vertexAdder.adder.Add1(raster.Point{raster.Fix32(x * 256), raster.Fix32(y * 256)}) - } - vertexAdder.command = VertexNoCommand -} - -type PathAdder struct { - adder raster.Adder - firstPoint raster.Point - ApproximationScale float64 -} - -func NewPathAdder(adder raster.Adder) *PathAdder { - return &PathAdder{adder, raster.Point{0, 0}, 1} -} - -func (pathAdder *PathAdder) Convert(paths ...*PathStorage) { - for _, path := range paths { - j := 0 - for _, cmd := range path.commands { - switch cmd { - case MoveTo: - pathAdder.firstPoint = raster.Point{raster.Fix32(path.vertices[j] * 256), raster.Fix32(path.vertices[j+1] * 256)} - pathAdder.adder.Start(pathAdder.firstPoint) - j += 2 - case LineTo: - pathAdder.adder.Add1(raster.Point{raster.Fix32(path.vertices[j] * 256), raster.Fix32(path.vertices[j+1] * 256)}) - j += 2 - case QuadCurveTo: - pathAdder.adder.Add2(raster.Point{raster.Fix32(path.vertices[j] * 256), raster.Fix32(path.vertices[j+1] * 256)}, raster.Point{raster.Fix32(path.vertices[j+2] * 256), raster.Fix32(path.vertices[j+3] * 256)}) - j += 4 - case CubicCurveTo: - pathAdder.adder.Add3(raster.Point{raster.Fix32(path.vertices[j] * 256), raster.Fix32(path.vertices[j+1] * 256)}, raster.Point{raster.Fix32(path.vertices[j+2] * 256), raster.Fix32(path.vertices[j+3] * 256)}, raster.Point{raster.Fix32(path.vertices[j+4] * 256), raster.Fix32(path.vertices[j+5] * 256)}) - j += 6 - case ArcTo: - lastPoint := arcAdder(pathAdder.adder, path.vertices[j], path.vertices[j+1], path.vertices[j+2], path.vertices[j+3], path.vertices[j+4], path.vertices[j+5], pathAdder.ApproximationScale) - pathAdder.adder.Add1(lastPoint) - j += 6 - case Close: - pathAdder.adder.Add1(pathAdder.firstPoint) - } - } - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/path_converter.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/path_converter.go deleted file mode 100644 index 0ef96b84d..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/path_converter.go +++ /dev/null @@ -1,173 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 06/12/2010 by Laurent Le Goff - -package draw2d - -import ( - "math" -) - -type PathConverter struct { - converter VertexConverter - ApproximationScale, AngleTolerance, CuspLimit float64 - startX, startY, x, y float64 -} - -func NewPathConverter(converter VertexConverter) *PathConverter { - return &PathConverter{converter, 1, 0, 0, 0, 0, 0, 0} -} - -func (c *PathConverter) Convert(paths ...*PathStorage) { - for _, path := range paths { - j := 0 - for _, cmd := range path.commands { - j = j + c.ConvertCommand(cmd, path.vertices[j:]...) - } - c.converter.NextCommand(VertexStopCommand) - } -} - -func (c *PathConverter) ConvertCommand(cmd PathCmd, vertices ...float64) int { - switch cmd { - case MoveTo: - c.x, c.y = vertices[0], vertices[1] - c.startX, c.startY = c.x, c.y - c.converter.NextCommand(VertexStopCommand) - c.converter.NextCommand(VertexStartCommand) - c.converter.Vertex(c.x, c.y) - return 2 - case LineTo: - c.x, c.y = vertices[0], vertices[1] - if c.startX == c.x && c.startY == c.y { - c.converter.NextCommand(VertexCloseCommand) - } - c.converter.Vertex(c.x, c.y) - c.converter.NextCommand(VertexJoinCommand) - return 2 - case QuadCurveTo: - quadraticBezier(c.converter, c.x, c.y, vertices[0], vertices[1], vertices[2], vertices[3], c.ApproximationScale, c.AngleTolerance) - c.x, c.y = vertices[2], vertices[3] - if c.startX == c.x && c.startY == c.y { - c.converter.NextCommand(VertexCloseCommand) - } - c.converter.Vertex(c.x, c.y) - return 4 - case CubicCurveTo: - cubicBezier(c.converter, c.x, c.y, vertices[0], vertices[1], vertices[2], vertices[3], vertices[4], vertices[5], c.ApproximationScale, c.AngleTolerance, c.CuspLimit) - c.x, c.y = vertices[4], vertices[5] - if c.startX == c.x && c.startY == c.y { - c.converter.NextCommand(VertexCloseCommand) - } - c.converter.Vertex(c.x, c.y) - return 6 - case ArcTo: - c.x, c.y = arc(c.converter, vertices[0], vertices[1], vertices[2], vertices[3], vertices[4], vertices[5], c.ApproximationScale) - if c.startX == c.x && c.startY == c.y { - c.converter.NextCommand(VertexCloseCommand) - } - c.converter.Vertex(c.x, c.y) - return 6 - case Close: - c.converter.NextCommand(VertexCloseCommand) - c.converter.Vertex(c.startX, c.startY) - return 0 - } - return 0 -} - -func (c *PathConverter) MoveTo(x, y float64) *PathConverter { - c.x, c.y = x, y - c.startX, c.startY = c.x, c.y - c.converter.NextCommand(VertexStopCommand) - c.converter.NextCommand(VertexStartCommand) - c.converter.Vertex(c.x, c.y) - return c -} - -func (c *PathConverter) RMoveTo(dx, dy float64) *PathConverter { - c.MoveTo(c.x+dx, c.y+dy) - return c -} - -func (c *PathConverter) LineTo(x, y float64) *PathConverter { - c.x, c.y = x, y - if c.startX == c.x && c.startY == c.y { - c.converter.NextCommand(VertexCloseCommand) - } - c.converter.Vertex(c.x, c.y) - c.converter.NextCommand(VertexJoinCommand) - return c -} - -func (c *PathConverter) RLineTo(dx, dy float64) *PathConverter { - c.LineTo(c.x+dx, c.y+dy) - return c -} - -func (c *PathConverter) QuadCurveTo(cx, cy, x, y float64) *PathConverter { - quadraticBezier(c.converter, c.x, c.y, cx, cy, x, y, c.ApproximationScale, c.AngleTolerance) - c.x, c.y = x, y - if c.startX == c.x && c.startY == c.y { - c.converter.NextCommand(VertexCloseCommand) - } - c.converter.Vertex(c.x, c.y) - return c -} - -func (c *PathConverter) RQuadCurveTo(dcx, dcy, dx, dy float64) *PathConverter { - c.QuadCurveTo(c.x+dcx, c.y+dcy, c.x+dx, c.y+dy) - return c -} - -func (c *PathConverter) CubicCurveTo(cx1, cy1, cx2, cy2, x, y float64) *PathConverter { - cubicBezier(c.converter, c.x, c.y, cx1, cy1, cx2, cy2, x, y, c.ApproximationScale, c.AngleTolerance, c.CuspLimit) - c.x, c.y = x, y - if c.startX == c.x && c.startY == c.y { - c.converter.NextCommand(VertexCloseCommand) - } - c.converter.Vertex(c.x, c.y) - return c -} - -func (c *PathConverter) RCubicCurveTo(dcx1, dcy1, dcx2, dcy2, dx, dy float64) *PathConverter { - c.CubicCurveTo(c.x+dcx1, c.y+dcy1, c.x+dcx2, c.y+dcy2, c.x+dx, c.y+dy) - return c -} - -func (c *PathConverter) ArcTo(cx, cy, rx, ry, startAngle, angle float64) *PathConverter { - endAngle := startAngle + angle - clockWise := true - if angle < 0 { - clockWise = false - } - // normalize - if clockWise { - for endAngle < startAngle { - endAngle += math.Pi * 2.0 - } - } else { - for startAngle < endAngle { - startAngle += math.Pi * 2.0 - } - } - startX := cx + math.Cos(startAngle)*rx - startY := cy + math.Sin(startAngle)*ry - c.MoveTo(startX, startY) - c.x, c.y = arc(c.converter, cx, cy, rx, ry, startAngle, angle, c.ApproximationScale) - if c.startX == c.x && c.startY == c.y { - c.converter.NextCommand(VertexCloseCommand) - } - c.converter.Vertex(c.x, c.y) - return c -} - -func (c *PathConverter) RArcTo(dcx, dcy, rx, ry, startAngle, angle float64) *PathConverter { - c.ArcTo(c.x+dcx, c.y+dcy, rx, ry, startAngle, angle) - return c -} - -func (c *PathConverter) Close() *PathConverter { - c.converter.NextCommand(VertexCloseCommand) - c.converter.Vertex(c.startX, c.startY) - return c -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/path_storage.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/path_storage.go deleted file mode 100644 index c2a887037..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/path_storage.go +++ /dev/null @@ -1,190 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff - -package draw2d - -import ( - "fmt" - "math" -) - -type PathCmd int - -const ( - MoveTo PathCmd = iota - LineTo - QuadCurveTo - CubicCurveTo - ArcTo - Close -) - -type PathStorage struct { - commands []PathCmd - vertices []float64 - x, y float64 -} - -func NewPathStorage() (p *PathStorage) { - p = new(PathStorage) - p.commands = make([]PathCmd, 0, 256) - p.vertices = make([]float64, 0, 256) - return -} - -func (p *PathStorage) Clear() { - p.commands = p.commands[0:0] - p.vertices = p.vertices[0:0] - return -} - -func (p *PathStorage) appendToPath(cmd PathCmd, vertices ...float64) { - if cap(p.vertices) <= len(p.vertices)+6 { - a := make([]PathCmd, len(p.commands), cap(p.commands)+256) - b := make([]float64, len(p.vertices), cap(p.vertices)+256) - copy(a, p.commands) - p.commands = a - copy(b, p.vertices) - p.vertices = b - } - p.commands = p.commands[0 : len(p.commands)+1] - p.commands[len(p.commands)-1] = cmd - copy(p.vertices[len(p.vertices):len(p.vertices)+len(vertices)], vertices) - p.vertices = p.vertices[0 : len(p.vertices)+len(vertices)] -} - -func (src *PathStorage) Copy() (dest *PathStorage) { - dest = new(PathStorage) - dest.commands = make([]PathCmd, len(src.commands)) - copy(dest.commands, src.commands) - dest.vertices = make([]float64, len(src.vertices)) - copy(dest.vertices, src.vertices) - return dest -} - -func (p *PathStorage) LastPoint() (x, y float64) { - return p.x, p.y -} - -func (p *PathStorage) IsEmpty() bool { - return len(p.commands) == 0 -} - -func (p *PathStorage) Close() *PathStorage { - p.appendToPath(Close) - return p -} - -func (p *PathStorage) MoveTo(x, y float64) *PathStorage { - p.appendToPath(MoveTo, x, y) - p.x = x - p.y = y - return p -} - -func (p *PathStorage) RMoveTo(dx, dy float64) *PathStorage { - x, y := p.LastPoint() - p.MoveTo(x+dx, y+dy) - return p -} - -func (p *PathStorage) LineTo(x, y float64) *PathStorage { - p.appendToPath(LineTo, x, y) - p.x = x - p.y = y - return p -} - -func (p *PathStorage) RLineTo(dx, dy float64) *PathStorage { - x, y := p.LastPoint() - p.LineTo(x+dx, y+dy) - return p -} - -func (p *PathStorage) QuadCurveTo(cx, cy, x, y float64) *PathStorage { - p.appendToPath(QuadCurveTo, cx, cy, x, y) - p.x = x - p.y = y - return p -} - -func (p *PathStorage) RQuadCurveTo(dcx, dcy, dx, dy float64) *PathStorage { - x, y := p.LastPoint() - p.QuadCurveTo(x+dcx, y+dcy, x+dx, y+dy) - return p -} - -func (p *PathStorage) CubicCurveTo(cx1, cy1, cx2, cy2, x, y float64) *PathStorage { - p.appendToPath(CubicCurveTo, cx1, cy1, cx2, cy2, x, y) - p.x = x - p.y = y - return p -} - -func (p *PathStorage) RCubicCurveTo(dcx1, dcy1, dcx2, dcy2, dx, dy float64) *PathStorage { - x, y := p.LastPoint() - p.CubicCurveTo(x+dcx1, y+dcy1, x+dcx2, y+dcy2, x+dx, y+dy) - return p -} - -func (p *PathStorage) ArcTo(cx, cy, rx, ry, startAngle, angle float64) *PathStorage { - endAngle := startAngle + angle - clockWise := true - if angle < 0 { - clockWise = false - } - // normalize - if clockWise { - for endAngle < startAngle { - endAngle += math.Pi * 2.0 - } - } else { - for startAngle < endAngle { - startAngle += math.Pi * 2.0 - } - } - startX := cx + math.Cos(startAngle)*rx - startY := cy + math.Sin(startAngle)*ry - if len(p.commands) > 0 { - p.LineTo(startX, startY) - } else { - p.MoveTo(startX, startY) - } - p.appendToPath(ArcTo, cx, cy, rx, ry, startAngle, angle) - p.x = cx + math.Cos(endAngle)*rx - p.y = cy + math.Sin(endAngle)*ry - return p -} - -func (p *PathStorage) RArcTo(dcx, dcy, rx, ry, startAngle, angle float64) *PathStorage { - x, y := p.LastPoint() - p.ArcTo(x+dcx, y+dcy, rx, ry, startAngle, angle) - return p -} - -func (p *PathStorage) String() string { - s := "" - j := 0 - for _, cmd := range p.commands { - switch cmd { - case MoveTo: - s += fmt.Sprintf("MoveTo: %f, %f\n", p.vertices[j], p.vertices[j+1]) - j = j + 2 - case LineTo: - s += fmt.Sprintf("LineTo: %f, %f\n", p.vertices[j], p.vertices[j+1]) - j = j + 2 - case QuadCurveTo: - s += fmt.Sprintf("QuadCurveTo: %f, %f, %f, %f\n", p.vertices[j], p.vertices[j+1], p.vertices[j+2], p.vertices[j+3]) - j = j + 4 - case CubicCurveTo: - s += fmt.Sprintf("CubicCurveTo: %f, %f, %f, %f, %f, %f\n", p.vertices[j], p.vertices[j+1], p.vertices[j+2], p.vertices[j+3], p.vertices[j+4], p.vertices[j+5]) - j = j + 6 - case ArcTo: - s += fmt.Sprintf("ArcTo: %f, %f, %f, %f, %f, %f\n", p.vertices[j], p.vertices[j+1], p.vertices[j+2], p.vertices[j+3], p.vertices[j+4], p.vertices[j+5]) - j = j + 6 - case Close: - s += "Close\n" - } - } - return s -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/coverage_table.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/coverage_table.go deleted file mode 100644 index 429836f39..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/coverage_table.go +++ /dev/null @@ -1,203 +0,0 @@ -// Copyright 2011 The draw2d Authors. All rights reserved. -// created: 27/05/2011 by Laurent Le Goff -package raster - -var SUBPIXEL_OFFSETS_SAMPLE_8 = [8]float64{ - 5.0 / 8, - 0.0 / 8, - 3.0 / 8, - 6.0 / 8, - 1.0 / 8, - 4.0 / 8, - 7.0 / 8, - 2.0 / 8, -} - -var SUBPIXEL_OFFSETS_SAMPLE_8_FIXED = [8]Fix{ - Fix(SUBPIXEL_OFFSETS_SAMPLE_8[0] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_8[1] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_8[2] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_8[3] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_8[4] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_8[5] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_8[6] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_8[7] * FIXED_FLOAT_COEF), -} - -var SUBPIXEL_OFFSETS_SAMPLE_16 = [16]float64{ - 1.0 / 16, - 8.0 / 16, - 4.0 / 16, - 15.0 / 16, - 11.0 / 16, - 2.0 / 16, - 6.0 / 16, - 14.0 / 16, - 10.0 / 16, - 3.0 / 16, - 7.0 / 16, - 12.0 / 16, - 0.0 / 16, - 9.0 / 16, - 5.0 / 16, - 13.0 / 16, -} - -var SUBPIXEL_OFFSETS_SAMPLE_16_FIXED = [16]Fix{ - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[0] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[1] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[2] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[3] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[4] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[5] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[6] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[7] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[8] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[9] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[10] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[11] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[12] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[13] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[14] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_16[15] * FIXED_FLOAT_COEF), -} - -var SUBPIXEL_OFFSETS_SAMPLE_32 = [32]float64{ - 28.0 / 32, - 13.0 / 32, - 6.0 / 32, - 23.0 / 32, - 0.0 / 32, - 17.0 / 32, - 10.0 / 32, - 27.0 / 32, - 4.0 / 32, - 21.0 / 32, - 14.0 / 32, - 31.0 / 32, - 8.0 / 32, - 25.0 / 32, - 18.0 / 32, - 3.0 / 32, - 12.0 / 32, - 29.0 / 32, - 22.0 / 32, - 7.0 / 32, - 16.0 / 32, - 1.0 / 32, - 26.0 / 32, - 11.0 / 32, - 20.0 / 32, - 5.0 / 32, - 30.0 / 32, - 15.0 / 32, - 24.0 / 32, - 9.0 / 32, - 2.0 / 32, - 19.0 / 32, -} -var SUBPIXEL_OFFSETS_SAMPLE_32_FIXED = [32]Fix{ - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[0] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[1] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[2] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[3] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[4] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[5] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[6] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[7] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[8] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[9] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[10] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[11] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[12] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[13] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[14] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[15] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[16] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[17] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[18] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[19] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[20] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[21] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[22] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[23] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[24] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[25] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[26] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[27] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[28] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[29] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[30] * FIXED_FLOAT_COEF), - Fix(SUBPIXEL_OFFSETS_SAMPLE_32[31] * FIXED_FLOAT_COEF), -} - -var coverageTable = [256]uint8{ - pixelCoverage(0x00), pixelCoverage(0x01), pixelCoverage(0x02), pixelCoverage(0x03), - pixelCoverage(0x04), pixelCoverage(0x05), pixelCoverage(0x06), pixelCoverage(0x07), - pixelCoverage(0x08), pixelCoverage(0x09), pixelCoverage(0x0a), pixelCoverage(0x0b), - pixelCoverage(0x0c), pixelCoverage(0x0d), pixelCoverage(0x0e), pixelCoverage(0x0f), - pixelCoverage(0x10), pixelCoverage(0x11), pixelCoverage(0x12), pixelCoverage(0x13), - pixelCoverage(0x14), pixelCoverage(0x15), pixelCoverage(0x16), pixelCoverage(0x17), - pixelCoverage(0x18), pixelCoverage(0x19), pixelCoverage(0x1a), pixelCoverage(0x1b), - pixelCoverage(0x1c), pixelCoverage(0x1d), pixelCoverage(0x1e), pixelCoverage(0x1f), - pixelCoverage(0x20), pixelCoverage(0x21), pixelCoverage(0x22), pixelCoverage(0x23), - pixelCoverage(0x24), pixelCoverage(0x25), pixelCoverage(0x26), pixelCoverage(0x27), - pixelCoverage(0x28), pixelCoverage(0x29), pixelCoverage(0x2a), pixelCoverage(0x2b), - pixelCoverage(0x2c), pixelCoverage(0x2d), pixelCoverage(0x2e), pixelCoverage(0x2f), - pixelCoverage(0x30), pixelCoverage(0x31), pixelCoverage(0x32), pixelCoverage(0x33), - pixelCoverage(0x34), pixelCoverage(0x35), pixelCoverage(0x36), pixelCoverage(0x37), - pixelCoverage(0x38), pixelCoverage(0x39), pixelCoverage(0x3a), pixelCoverage(0x3b), - pixelCoverage(0x3c), pixelCoverage(0x3d), pixelCoverage(0x3e), pixelCoverage(0x3f), - pixelCoverage(0x40), pixelCoverage(0x41), pixelCoverage(0x42), pixelCoverage(0x43), - pixelCoverage(0x44), pixelCoverage(0x45), pixelCoverage(0x46), pixelCoverage(0x47), - pixelCoverage(0x48), pixelCoverage(0x49), pixelCoverage(0x4a), pixelCoverage(0x4b), - pixelCoverage(0x4c), pixelCoverage(0x4d), pixelCoverage(0x4e), pixelCoverage(0x4f), - pixelCoverage(0x50), pixelCoverage(0x51), pixelCoverage(0x52), pixelCoverage(0x53), - pixelCoverage(0x54), pixelCoverage(0x55), pixelCoverage(0x56), pixelCoverage(0x57), - pixelCoverage(0x58), pixelCoverage(0x59), pixelCoverage(0x5a), pixelCoverage(0x5b), - pixelCoverage(0x5c), pixelCoverage(0x5d), pixelCoverage(0x5e), pixelCoverage(0x5f), - pixelCoverage(0x60), pixelCoverage(0x61), pixelCoverage(0x62), pixelCoverage(0x63), - pixelCoverage(0x64), pixelCoverage(0x65), pixelCoverage(0x66), pixelCoverage(0x67), - pixelCoverage(0x68), pixelCoverage(0x69), pixelCoverage(0x6a), pixelCoverage(0x6b), - pixelCoverage(0x6c), pixelCoverage(0x6d), pixelCoverage(0x6e), pixelCoverage(0x6f), - pixelCoverage(0x70), pixelCoverage(0x71), pixelCoverage(0x72), pixelCoverage(0x73), - pixelCoverage(0x74), pixelCoverage(0x75), pixelCoverage(0x76), pixelCoverage(0x77), - pixelCoverage(0x78), pixelCoverage(0x79), pixelCoverage(0x7a), pixelCoverage(0x7b), - pixelCoverage(0x7c), pixelCoverage(0x7d), pixelCoverage(0x7e), pixelCoverage(0x7f), - pixelCoverage(0x80), pixelCoverage(0x81), pixelCoverage(0x82), pixelCoverage(0x83), - pixelCoverage(0x84), pixelCoverage(0x85), pixelCoverage(0x86), pixelCoverage(0x87), - pixelCoverage(0x88), pixelCoverage(0x89), pixelCoverage(0x8a), pixelCoverage(0x8b), - pixelCoverage(0x8c), pixelCoverage(0x8d), pixelCoverage(0x8e), pixelCoverage(0x8f), - pixelCoverage(0x90), pixelCoverage(0x91), pixelCoverage(0x92), pixelCoverage(0x93), - pixelCoverage(0x94), pixelCoverage(0x95), pixelCoverage(0x96), pixelCoverage(0x97), - pixelCoverage(0x98), pixelCoverage(0x99), pixelCoverage(0x9a), pixelCoverage(0x9b), - pixelCoverage(0x9c), pixelCoverage(0x9d), pixelCoverage(0x9e), pixelCoverage(0x9f), - pixelCoverage(0xa0), pixelCoverage(0xa1), pixelCoverage(0xa2), pixelCoverage(0xa3), - pixelCoverage(0xa4), pixelCoverage(0xa5), pixelCoverage(0xa6), pixelCoverage(0xa7), - pixelCoverage(0xa8), pixelCoverage(0xa9), pixelCoverage(0xaa), pixelCoverage(0xab), - pixelCoverage(0xac), pixelCoverage(0xad), pixelCoverage(0xae), pixelCoverage(0xaf), - pixelCoverage(0xb0), pixelCoverage(0xb1), pixelCoverage(0xb2), pixelCoverage(0xb3), - pixelCoverage(0xb4), pixelCoverage(0xb5), pixelCoverage(0xb6), pixelCoverage(0xb7), - pixelCoverage(0xb8), pixelCoverage(0xb9), pixelCoverage(0xba), pixelCoverage(0xbb), - pixelCoverage(0xbc), pixelCoverage(0xbd), pixelCoverage(0xbe), pixelCoverage(0xbf), - pixelCoverage(0xc0), pixelCoverage(0xc1), pixelCoverage(0xc2), pixelCoverage(0xc3), - pixelCoverage(0xc4), pixelCoverage(0xc5), pixelCoverage(0xc6), pixelCoverage(0xc7), - pixelCoverage(0xc8), pixelCoverage(0xc9), pixelCoverage(0xca), pixelCoverage(0xcb), - pixelCoverage(0xcc), pixelCoverage(0xcd), pixelCoverage(0xce), pixelCoverage(0xcf), - pixelCoverage(0xd0), pixelCoverage(0xd1), pixelCoverage(0xd2), pixelCoverage(0xd3), - pixelCoverage(0xd4), pixelCoverage(0xd5), pixelCoverage(0xd6), pixelCoverage(0xd7), - pixelCoverage(0xd8), pixelCoverage(0xd9), pixelCoverage(0xda), pixelCoverage(0xdb), - pixelCoverage(0xdc), pixelCoverage(0xdd), pixelCoverage(0xde), pixelCoverage(0xdf), - pixelCoverage(0xe0), pixelCoverage(0xe1), pixelCoverage(0xe2), pixelCoverage(0xe3), - pixelCoverage(0xe4), pixelCoverage(0xe5), pixelCoverage(0xe6), pixelCoverage(0xe7), - pixelCoverage(0xe8), pixelCoverage(0xe9), pixelCoverage(0xea), pixelCoverage(0xeb), - pixelCoverage(0xec), pixelCoverage(0xed), pixelCoverage(0xee), pixelCoverage(0xef), - pixelCoverage(0xf0), pixelCoverage(0xf1), pixelCoverage(0xf2), pixelCoverage(0xf3), - pixelCoverage(0xf4), pixelCoverage(0xf5), pixelCoverage(0xf6), pixelCoverage(0xf7), - pixelCoverage(0xf8), pixelCoverage(0xf9), pixelCoverage(0xfa), pixelCoverage(0xfb), - pixelCoverage(0xfc), pixelCoverage(0xfd), pixelCoverage(0xfe), pixelCoverage(0xff), -} - -func pixelCoverage(a uint8) uint8 { - return a&1 + a>>1&1 + a>>2&1 + a>>3&1 + a>>4&1 + a>>5&1 + a>>6&1 + a>>7&1 -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/fillerAA.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/fillerAA.go deleted file mode 100644 index dbff87f1e..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/fillerAA.go +++ /dev/null @@ -1,320 +0,0 @@ -// Copyright 2011 The draw2d Authors. All rights reserved. -// created: 27/05/2011 by Laurent Le Goff -package raster - -import ( - "image" - "image/color" - "unsafe" -) - -const ( - SUBPIXEL_SHIFT = 3 - SUBPIXEL_COUNT = 1 << SUBPIXEL_SHIFT -) - -var SUBPIXEL_OFFSETS = SUBPIXEL_OFFSETS_SAMPLE_8_FIXED - -type SUBPIXEL_DATA uint8 -type NON_ZERO_MASK_DATA_UNIT uint8 - -type Rasterizer8BitsSample struct { - MaskBuffer []SUBPIXEL_DATA - WindingBuffer []NON_ZERO_MASK_DATA_UNIT - - Width int - BufferWidth int - Height int - ClipBound [4]float64 - RemappingMatrix [6]float64 -} - -/* width and height define the maximum output size for the filler. - * The filler will output to larger bitmaps as well, but the output will - * be cropped. - */ -func NewRasterizer8BitsSample(width, height int) *Rasterizer8BitsSample { - var r Rasterizer8BitsSample - // Scale the coordinates by SUBPIXEL_COUNT in vertical direction - // The sampling point for the sub-pixel is at the top right corner. This - // adjustment moves it to the pixel center. - r.RemappingMatrix = [6]float64{1, 0, 0, SUBPIXEL_COUNT, 0.5 / SUBPIXEL_COUNT, -0.5 * SUBPIXEL_COUNT} - r.Width = width - r.Height = height - // The buffer used for filling needs to be one pixel wider than the bitmap. - // This is because the end flag that turns the fill of is the first pixel - // after the actually drawn edge. - r.BufferWidth = width + 1 - - r.MaskBuffer = make([]SUBPIXEL_DATA, r.BufferWidth*height) - r.WindingBuffer = make([]NON_ZERO_MASK_DATA_UNIT, r.BufferWidth*height*SUBPIXEL_COUNT) - r.ClipBound = clip(0, 0, width, height, SUBPIXEL_COUNT) - return &r -} - -func clip(x, y, width, height, scale int) [4]float64 { - var clipBound [4]float64 - - offset := 0.99 / float64(scale) - - clipBound[0] = float64(x) + offset - clipBound[2] = float64(x+width) - offset - - clipBound[1] = float64(y * scale) - clipBound[3] = float64((y + height) * scale) - return clipBound -} - -func intersect(r1, r2 [4]float64) [4]float64 { - if r1[0] < r2[0] { - r1[0] = r2[0] - } - if r1[2] > r2[2] { - r1[2] = r2[2] - } - if r1[0] > r1[2] { - r1[0] = r1[2] - } - - if r1[1] < r2[1] { - r1[1] = r2[1] - } - if r1[3] > r2[3] { - r1[3] = r2[3] - } - if r1[1] > r1[3] { - r1[1] = r1[3] - } - return r1 -} - -func (r *Rasterizer8BitsSample) RenderEvenOdd(img *image.RGBA, color *color.RGBA, polygon *Polygon, tr [6]float64) { - // memset 0 the mask buffer - r.MaskBuffer = make([]SUBPIXEL_DATA, r.BufferWidth*r.Height) - - // inline matrix multiplication - transform := [6]float64{ - tr[0]*r.RemappingMatrix[0] + tr[1]*r.RemappingMatrix[2], - tr[1]*r.RemappingMatrix[3] + tr[0]*r.RemappingMatrix[1], - tr[2]*r.RemappingMatrix[0] + tr[3]*r.RemappingMatrix[2], - tr[3]*r.RemappingMatrix[3] + tr[2]*r.RemappingMatrix[1], - tr[4]*r.RemappingMatrix[0] + tr[5]*r.RemappingMatrix[2] + r.RemappingMatrix[4], - tr[5]*r.RemappingMatrix[3] + tr[4]*r.RemappingMatrix[1] + r.RemappingMatrix[5], - } - - clipRect := clip(img.Bounds().Min.X, img.Bounds().Min.Y, img.Bounds().Dx(), img.Bounds().Dy(), SUBPIXEL_COUNT) - clipRect = intersect(clipRect, r.ClipBound) - p := 0 - l := len(*polygon) / 2 - var edges [32]PolygonEdge - for p < l { - edgeCount := polygon.getEdges(p, 16, edges[:], transform, clipRect) - for k := 0; k < edgeCount; k++ { - r.addEvenOddEdge(&edges[k]) - } - p += 16 - } - - r.fillEvenOdd(img, color, clipRect) -} - -//! Adds an edge to be used with even-odd fill. -func (r *Rasterizer8BitsSample) addEvenOddEdge(edge *PolygonEdge) { - x := Fix(edge.X * FIXED_FLOAT_COEF) - slope := Fix(edge.Slope * FIXED_FLOAT_COEF) - slopeFix := Fix(0) - if edge.LastLine-edge.FirstLine >= SLOPE_FIX_STEP { - slopeFix = Fix(edge.Slope*SLOPE_FIX_STEP*FIXED_FLOAT_COEF) - slope<<SLOPE_FIX_SHIFT - } - - var mask SUBPIXEL_DATA - var ySub uint32 - var xp, yLine int - for y := edge.FirstLine; y <= edge.LastLine; y++ { - ySub = uint32(y & (SUBPIXEL_COUNT - 1)) - xp = int((x + SUBPIXEL_OFFSETS[ySub]) >> FIXED_SHIFT) - mask = SUBPIXEL_DATA(1 << ySub) - yLine = y >> SUBPIXEL_SHIFT - r.MaskBuffer[yLine*r.BufferWidth+xp] ^= mask - x += slope - if y&SLOPE_FIX_MASK == 0 { - x += slopeFix - } - } -} - -//! Adds an edge to be used with non-zero winding fill. -func (r *Rasterizer8BitsSample) addNonZeroEdge(edge *PolygonEdge) { - x := Fix(edge.X * FIXED_FLOAT_COEF) - slope := Fix(edge.Slope * FIXED_FLOAT_COEF) - slopeFix := Fix(0) - if edge.LastLine-edge.FirstLine >= SLOPE_FIX_STEP { - slopeFix = Fix(edge.Slope*SLOPE_FIX_STEP*FIXED_FLOAT_COEF) - slope<<SLOPE_FIX_SHIFT - } - var mask SUBPIXEL_DATA - var ySub uint32 - var xp, yLine int - winding := NON_ZERO_MASK_DATA_UNIT(edge.Winding) - for y := edge.FirstLine; y <= edge.LastLine; y++ { - ySub = uint32(y & (SUBPIXEL_COUNT - 1)) - xp = int((x + SUBPIXEL_OFFSETS[ySub]) >> FIXED_SHIFT) - mask = SUBPIXEL_DATA(1 << ySub) - yLine = y >> SUBPIXEL_SHIFT - r.MaskBuffer[yLine*r.BufferWidth+xp] |= mask - r.WindingBuffer[(yLine*r.BufferWidth+xp)*SUBPIXEL_COUNT+int(ySub)] += winding - x += slope - if y&SLOPE_FIX_MASK == 0 { - x += slopeFix - } - } -} - -// Renders the mask to the canvas with even-odd fill. -func (r *Rasterizer8BitsSample) fillEvenOdd(img *image.RGBA, color *color.RGBA, clipBound [4]float64) { - var x, y uint32 - - minX := uint32(clipBound[0]) - maxX := uint32(clipBound[2]) - - minY := uint32(clipBound[1]) >> SUBPIXEL_SHIFT - maxY := uint32(clipBound[3]) >> SUBPIXEL_SHIFT - - //pixColor := (uint32(color.R) << 24) | (uint32(color.G) << 16) | (uint32(color.B) << 8) | uint32(color.A) - pixColor := (*uint32)(unsafe.Pointer(color)) - cs1 := *pixColor & 0xff00ff - cs2 := *pixColor >> 8 & 0xff00ff - - stride := uint32(img.Stride) - var mask SUBPIXEL_DATA - - for y = minY; y < maxY; y++ { - tp := img.Pix[y*stride:] - - mask = 0 - for x = minX; x <= maxX; x++ { - p := (*uint32)(unsafe.Pointer(&tp[x])) - mask ^= r.MaskBuffer[y*uint32(r.BufferWidth)+x] - // 8bits - alpha := uint32(coverageTable[mask]) - // 16bits - //alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff]) - // 32bits - //alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff] + coverageTable[(mask >> 16) & 0xff] + coverageTable[(mask >> 24) & 0xff]) - - // alpha is in range of 0 to SUBPIXEL_COUNT - invAlpha := SUBPIXEL_COUNT - alpha - - ct1 := *p & 0xff00ff * invAlpha - ct2 := *p >> 8 & 0xff00ff * invAlpha - - ct1 = (ct1 + cs1*alpha) >> SUBPIXEL_SHIFT & 0xff00ff - ct2 = (ct2 + cs2*alpha) << (8 - SUBPIXEL_SHIFT) & 0xff00ff00 - - *p = ct1 + ct2 - } - } -} - -/* - * Renders the polygon with non-zero winding fill. - * param aTarget the target bitmap. - * param aPolygon the polygon to render. - * param aColor the color to be used for rendering. - * param aTransformation the transformation matrix. - */ -func (r *Rasterizer8BitsSample) RenderNonZeroWinding(img *image.RGBA, color *color.RGBA, polygon *Polygon, tr [6]float64) { - - r.MaskBuffer = make([]SUBPIXEL_DATA, r.BufferWidth*r.Height) - r.WindingBuffer = make([]NON_ZERO_MASK_DATA_UNIT, r.BufferWidth*r.Height*SUBPIXEL_COUNT) - - // inline matrix multiplication - transform := [6]float64{ - tr[0]*r.RemappingMatrix[0] + tr[1]*r.RemappingMatrix[2], - tr[1]*r.RemappingMatrix[3] + tr[0]*r.RemappingMatrix[1], - tr[2]*r.RemappingMatrix[0] + tr[3]*r.RemappingMatrix[2], - tr[3]*r.RemappingMatrix[3] + tr[2]*r.RemappingMatrix[1], - tr[4]*r.RemappingMatrix[0] + tr[5]*r.RemappingMatrix[2] + r.RemappingMatrix[4], - tr[5]*r.RemappingMatrix[3] + tr[4]*r.RemappingMatrix[1] + r.RemappingMatrix[5], - } - - clipRect := clip(img.Bounds().Min.X, img.Bounds().Min.Y, img.Bounds().Dx(), img.Bounds().Dy(), SUBPIXEL_COUNT) - clipRect = intersect(clipRect, r.ClipBound) - - p := 0 - l := len(*polygon) / 2 - var edges [32]PolygonEdge - for p < l { - edgeCount := polygon.getEdges(p, 16, edges[:], transform, clipRect) - for k := 0; k < edgeCount; k++ { - r.addNonZeroEdge(&edges[k]) - } - p += 16 - } - - r.fillNonZero(img, color, clipRect) -} - -//! Renders the mask to the canvas with non-zero winding fill. -func (r *Rasterizer8BitsSample) fillNonZero(img *image.RGBA, color *color.RGBA, clipBound [4]float64) { - var x, y uint32 - - minX := uint32(clipBound[0]) - maxX := uint32(clipBound[2]) - - minY := uint32(clipBound[1]) >> SUBPIXEL_SHIFT - maxY := uint32(clipBound[3]) >> SUBPIXEL_SHIFT - - //pixColor := (uint32(color.R) << 24) | (uint32(color.G) << 16) | (uint32(color.B) << 8) | uint32(color.A) - pixColor := (*uint32)(unsafe.Pointer(color)) - cs1 := *pixColor & 0xff00ff - cs2 := *pixColor >> 8 & 0xff00ff - - stride := uint32(img.Stride) - var mask SUBPIXEL_DATA - var n uint32 - var values [SUBPIXEL_COUNT]NON_ZERO_MASK_DATA_UNIT - for n = 0; n < SUBPIXEL_COUNT; n++ { - values[n] = 0 - } - - for y = minY; y < maxY; y++ { - tp := img.Pix[y*stride:] - - mask = 0 - for x = minX; x <= maxX; x++ { - p := (*uint32)(unsafe.Pointer(&tp[x])) - temp := r.MaskBuffer[y*uint32(r.BufferWidth)+x] - if temp != 0 { - var bit SUBPIXEL_DATA = 1 - for n = 0; n < SUBPIXEL_COUNT; n++ { - if temp&bit != 0 { - t := values[n] - values[n] += r.WindingBuffer[(y*uint32(r.BufferWidth)+x)*SUBPIXEL_COUNT+n] - if (t == 0 || values[n] == 0) && t != values[n] { - mask ^= bit - } - } - bit <<= 1 - } - } - - // 8bits - alpha := uint32(coverageTable[mask]) - // 16bits - //alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff]) - // 32bits - //alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff] + coverageTable[(mask >> 16) & 0xff] + coverageTable[(mask >> 24) & 0xff]) - - // alpha is in range of 0 to SUBPIXEL_COUNT - invAlpha := uint32(SUBPIXEL_COUNT) - alpha - - ct1 := *p & 0xff00ff * invAlpha - ct2 := *p >> 8 & 0xff00ff * invAlpha - - ct1 = (ct1 + cs1*alpha) >> SUBPIXEL_SHIFT & 0xff00ff - ct2 = (ct2 + cs2*alpha) << (8 - SUBPIXEL_SHIFT) & 0xff00ff00 - - *p = ct1 + ct2 - } - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/fillerV1/fillerAA.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/fillerV1/fillerAA.go deleted file mode 100644 index a85d34c77..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/fillerV1/fillerAA.go +++ /dev/null @@ -1,303 +0,0 @@ -// Copyright 2011 The draw2d Authors. All rights reserved. -// created: 27/05/2011 by Laurent Le Goff -package raster - -import ( - "image" - "image/color" - "unsafe" -) - -const ( - SUBPIXEL_SHIFT = 3 - SUBPIXEL_COUNT = 1 << SUBPIXEL_SHIFT -) - -var SUBPIXEL_OFFSETS = SUBPIXEL_OFFSETS_SAMPLE_8 - -type SUBPIXEL_DATA uint16 -type NON_ZERO_MASK_DATA_UNIT uint8 - -type Rasterizer8BitsSample struct { - MaskBuffer []SUBPIXEL_DATA - WindingBuffer []NON_ZERO_MASK_DATA_UNIT - - Width int - BufferWidth int - Height int - ClipBound [4]float64 - RemappingMatrix [6]float64 -} - -/* width and height define the maximum output size for the filler. - * The filler will output to larger bitmaps as well, but the output will - * be cropped. - */ -func NewRasterizer8BitsSample(width, height int) *Rasterizer8BitsSample { - var r Rasterizer8BitsSample - // Scale the coordinates by SUBPIXEL_COUNT in vertical direction - // The sampling point for the sub-pixel is at the top right corner. This - // adjustment moves it to the pixel center. - r.RemappingMatrix = [6]float64{1, 0, 0, SUBPIXEL_COUNT, 0.5 / SUBPIXEL_COUNT, -0.5 * SUBPIXEL_COUNT} - r.Width = width - r.Height = height - // The buffer used for filling needs to be one pixel wider than the bitmap. - // This is because the end flag that turns the fill of is the first pixel - // after the actually drawn edge. - r.BufferWidth = width + 1 - - r.MaskBuffer = make([]SUBPIXEL_DATA, r.BufferWidth*height) - r.WindingBuffer = make([]NON_ZERO_MASK_DATA_UNIT, r.BufferWidth*height*SUBPIXEL_COUNT) - r.ClipBound = clip(0, 0, width, height, SUBPIXEL_COUNT) - return &r -} - -func clip(x, y, width, height, scale int) [4]float64 { - var clipBound [4]float64 - - offset := 0.99 / float64(scale) - - clipBound[0] = float64(x) + offset - clipBound[2] = float64(x+width) - offset - - clipBound[1] = float64(y * scale) - clipBound[3] = float64((y + height) * scale) - return clipBound -} - -func intersect(r1, r2 [4]float64) [4]float64 { - if r1[0] < r2[0] { - r1[0] = r2[0] - } - if r1[2] > r2[2] { - r1[2] = r2[2] - } - if r1[0] > r1[2] { - r1[0] = r1[2] - } - - if r1[1] < r2[1] { - r1[1] = r2[1] - } - if r1[3] > r2[3] { - r1[3] = r2[3] - } - if r1[1] > r1[3] { - r1[1] = r1[3] - } - return r1 -} - -func (r *Rasterizer8BitsSample) RenderEvenOdd(img *image.RGBA, color *color.RGBA, polygon *Polygon, tr [6]float64) { - // memset 0 the mask buffer - r.MaskBuffer = make([]SUBPIXEL_DATA, r.BufferWidth*r.Height) - - // inline matrix multiplication - transform := [6]float64{ - tr[0]*r.RemappingMatrix[0] + tr[1]*r.RemappingMatrix[2], - tr[1]*r.RemappingMatrix[3] + tr[0]*r.RemappingMatrix[1], - tr[2]*r.RemappingMatrix[0] + tr[3]*r.RemappingMatrix[2], - tr[3]*r.RemappingMatrix[3] + tr[2]*r.RemappingMatrix[1], - tr[4]*r.RemappingMatrix[0] + tr[5]*r.RemappingMatrix[2] + r.RemappingMatrix[4], - tr[5]*r.RemappingMatrix[3] + tr[4]*r.RemappingMatrix[1] + r.RemappingMatrix[5], - } - - clipRect := clip(img.Bounds().Min.X, img.Bounds().Min.Y, img.Bounds().Dx(), img.Bounds().Dy(), SUBPIXEL_COUNT) - clipRect = intersect(clipRect, r.ClipBound) - p := 0 - l := len(*polygon) / 2 - var edges [32]PolygonEdge - for p < l { - edgeCount := polygon.getEdges(p, 16, edges[:], transform, clipRect) - for k := 0; k < edgeCount; k++ { - r.addEvenOddEdge(&edges[k]) - } - p += 16 - } - - r.fillEvenOdd(img, color, clipRect) -} - -//! Adds an edge to be used with even-odd fill. -func (r *Rasterizer8BitsSample) addEvenOddEdge(edge *PolygonEdge) { - x := edge.X - slope := edge.Slope - var ySub, mask SUBPIXEL_DATA - var xp, yLine int - for y := edge.FirstLine; y <= edge.LastLine; y++ { - ySub = SUBPIXEL_DATA(y & (SUBPIXEL_COUNT - 1)) - xp = int(x + SUBPIXEL_OFFSETS[ySub]) - mask = SUBPIXEL_DATA(1 << ySub) - yLine = y >> SUBPIXEL_SHIFT - r.MaskBuffer[yLine*r.BufferWidth+xp] ^= mask - x += slope - } -} - -// Renders the mask to the canvas with even-odd fill. -func (r *Rasterizer8BitsSample) fillEvenOdd(img *image.RGBA, color *color.RGBA, clipBound [4]float64) { - var x, y uint32 - - minX := uint32(clipBound[0]) - maxX := uint32(clipBound[2]) - - minY := uint32(clipBound[1]) >> SUBPIXEL_SHIFT - maxY := uint32(clipBound[3]) >> SUBPIXEL_SHIFT - - //pixColor := (uint32(color.R) << 24) | (uint32(color.G) << 16) | (uint32(color.B) << 8) | uint32(color.A) - pixColor := (*uint32)(unsafe.Pointer(color)) - cs1 := *pixColor & 0xff00ff - cs2 := *pixColor >> 8 & 0xff00ff - - stride := uint32(img.Stride) - var mask SUBPIXEL_DATA - - for y = minY; y < maxY; y++ { - tp := img.Pix[y*stride:] - - mask = 0 - for x = minX; x <= maxX; x++ { - p := (*uint32)(unsafe.Pointer(&tp[x])) - mask ^= r.MaskBuffer[y*uint32(r.BufferWidth)+x] - // 8bits - alpha := uint32(coverageTable[mask]) - // 16bits - //alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff]) - // 32bits - //alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff] + coverageTable[(mask >> 16) & 0xff] + coverageTable[(mask >> 24) & 0xff]) - - // alpha is in range of 0 to SUBPIXEL_COUNT - invAlpha := uint32(SUBPIXEL_COUNT) - alpha - - ct1 := *p & 0xff00ff * invAlpha - ct2 := *p >> 8 & 0xff00ff * invAlpha - - ct1 = (ct1 + cs1*alpha) >> SUBPIXEL_SHIFT & 0xff00ff - ct2 = (ct2 + cs2*alpha) << (8 - SUBPIXEL_SHIFT) & 0xff00ff00 - - *p = ct1 + ct2 - } - } -} - -/* - * Renders the polygon with non-zero winding fill. - * param aTarget the target bitmap. - * param aPolygon the polygon to render. - * param aColor the color to be used for rendering. - * param aTransformation the transformation matrix. - */ -func (r *Rasterizer8BitsSample) RenderNonZeroWinding(img *image.RGBA, color *color.RGBA, polygon *Polygon, tr [6]float64) { - - r.MaskBuffer = make([]SUBPIXEL_DATA, r.BufferWidth*r.Height) - r.WindingBuffer = make([]NON_ZERO_MASK_DATA_UNIT, r.BufferWidth*r.Height*SUBPIXEL_COUNT) - - // inline matrix multiplication - transform := [6]float64{ - tr[0]*r.RemappingMatrix[0] + tr[1]*r.RemappingMatrix[2], - tr[1]*r.RemappingMatrix[3] + tr[0]*r.RemappingMatrix[1], - tr[2]*r.RemappingMatrix[0] + tr[3]*r.RemappingMatrix[2], - tr[3]*r.RemappingMatrix[3] + tr[2]*r.RemappingMatrix[1], - tr[4]*r.RemappingMatrix[0] + tr[5]*r.RemappingMatrix[2] + r.RemappingMatrix[4], - tr[5]*r.RemappingMatrix[3] + tr[4]*r.RemappingMatrix[1] + r.RemappingMatrix[5], - } - - clipRect := clip(img.Bounds().Min.X, img.Bounds().Min.Y, img.Bounds().Dx(), img.Bounds().Dy(), SUBPIXEL_COUNT) - clipRect = intersect(clipRect, r.ClipBound) - - p := 0 - l := len(*polygon) / 2 - var edges [32]PolygonEdge - for p < l { - edgeCount := polygon.getEdges(p, 16, edges[:], transform, clipRect) - for k := 0; k < edgeCount; k++ { - r.addNonZeroEdge(&edges[k]) - } - p += 16 - } - - r.fillNonZero(img, color, clipRect) -} - -//! Adds an edge to be used with non-zero winding fill. -func (r *Rasterizer8BitsSample) addNonZeroEdge(edge *PolygonEdge) { - x := edge.X - slope := edge.Slope - var ySub, mask SUBPIXEL_DATA - var xp, yLine int - winding := NON_ZERO_MASK_DATA_UNIT(edge.Winding) - for y := edge.FirstLine; y <= edge.LastLine; y++ { - ySub = SUBPIXEL_DATA(y & (SUBPIXEL_COUNT - 1)) - xp = int(x + SUBPIXEL_OFFSETS[ySub]) - mask = SUBPIXEL_DATA(1 << ySub) - yLine = y >> SUBPIXEL_SHIFT - r.MaskBuffer[yLine*r.BufferWidth+xp] |= mask - r.WindingBuffer[(yLine*r.BufferWidth+xp)*SUBPIXEL_COUNT+int(ySub)] += winding - x += slope - } -} - -//! Renders the mask to the canvas with non-zero winding fill. -func (r *Rasterizer8BitsSample) fillNonZero(img *image.RGBA, color *color.RGBA, clipBound [4]float64) { - var x, y uint32 - - minX := uint32(clipBound[0]) - maxX := uint32(clipBound[2]) - - minY := uint32(clipBound[1]) >> SUBPIXEL_SHIFT - maxY := uint32(clipBound[3]) >> SUBPIXEL_SHIFT - - //pixColor := (uint32(color.R) << 24) | (uint32(color.G) << 16) | (uint32(color.B) << 8) | uint32(color.A) - pixColor := (*uint32)(unsafe.Pointer(color)) - cs1 := *pixColor & 0xff00ff - cs2 := *pixColor >> 8 & 0xff00ff - - stride := uint32(img.Stride) - var mask SUBPIXEL_DATA - var n uint32 - var values [SUBPIXEL_COUNT]NON_ZERO_MASK_DATA_UNIT - for n = 0; n < SUBPIXEL_COUNT; n++ { - values[n] = 0 - } - - for y = minY; y < maxY; y++ { - tp := img.Pix[y*stride:] - - mask = 0 - for x = minX; x <= maxX; x++ { - p := (*uint32)(unsafe.Pointer(&tp[x])) - temp := r.MaskBuffer[y*uint32(r.BufferWidth)+x] - if temp != 0 { - var bit SUBPIXEL_DATA = 1 - for n = 0; n < SUBPIXEL_COUNT; n++ { - if temp&bit != 0 { - t := values[n] - values[n] += r.WindingBuffer[(y*uint32(r.BufferWidth)+x)*SUBPIXEL_COUNT+n] - if (t == 0 || values[n] == 0) && t != values[n] { - mask ^= bit - } - } - bit <<= 1 - } - } - - // 8bits - alpha := uint32(coverageTable[mask]) - // 16bits - //alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff]) - // 32bits - //alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff] + coverageTable[(mask >> 16) & 0xff] + coverageTable[(mask >> 24) & 0xff]) - - // alpha is in range of 0 to SUBPIXEL_COUNT - invAlpha := uint32(SUBPIXEL_COUNT) - alpha - - ct1 := *p & 0xff00ff * invAlpha - ct2 := *p >> 8 & 0xff00ff * invAlpha - - ct1 = (ct1 + cs1*alpha) >> SUBPIXEL_SHIFT & 0xff00ff - ct2 = (ct2 + cs2*alpha) << (8 - SUBPIXEL_SHIFT) & 0xff00ff00 - - *p = ct1 + ct2 - } - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/fillerV2/fillerAA.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/fillerV2/fillerAA.go deleted file mode 100644 index 0bda5a4db..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/fillerV2/fillerAA.go +++ /dev/null @@ -1,320 +0,0 @@ -// Copyright 2011 The draw2d Authors. All rights reserved. -// created: 27/05/2011 by Laurent Le Goff -package raster - -import ( - "image" - "image/color" - "unsafe" -) - -const ( - SUBPIXEL_SHIFT = 5 - SUBPIXEL_COUNT = 1 << SUBPIXEL_SHIFT -) - -var SUBPIXEL_OFFSETS = SUBPIXEL_OFFSETS_SAMPLE_32_FIXED - -type SUBPIXEL_DATA uint32 -type NON_ZERO_MASK_DATA_UNIT uint8 - -type Rasterizer8BitsSample struct { - MaskBuffer []SUBPIXEL_DATA - WindingBuffer []NON_ZERO_MASK_DATA_UNIT - - Width int - BufferWidth int - Height int - ClipBound [4]float64 - RemappingMatrix [6]float64 -} - -/* width and height define the maximum output size for the filler. - * The filler will output to larger bitmaps as well, but the output will - * be cropped. - */ -func NewRasterizer8BitsSample(width, height int) *Rasterizer8BitsSample { - var r Rasterizer8BitsSample - // Scale the coordinates by SUBPIXEL_COUNT in vertical direction - // The sampling point for the sub-pixel is at the top right corner. This - // adjustment moves it to the pixel center. - r.RemappingMatrix = [6]float64{1, 0, 0, SUBPIXEL_COUNT, 0.5 / SUBPIXEL_COUNT, -0.5 * SUBPIXEL_COUNT} - r.Width = width - r.Height = height - // The buffer used for filling needs to be one pixel wider than the bitmap. - // This is because the end flag that turns the fill of is the first pixel - // after the actually drawn edge. - r.BufferWidth = width + 1 - - r.MaskBuffer = make([]SUBPIXEL_DATA, r.BufferWidth*height) - r.WindingBuffer = make([]NON_ZERO_MASK_DATA_UNIT, r.BufferWidth*height*SUBPIXEL_COUNT) - r.ClipBound = clip(0, 0, width, height, SUBPIXEL_COUNT) - return &r -} - -func clip(x, y, width, height, scale int) [4]float64 { - var clipBound [4]float64 - - offset := 0.99 / float64(scale) - - clipBound[0] = float64(x) + offset - clipBound[2] = float64(x+width) - offset - - clipBound[1] = float64(y * scale) - clipBound[3] = float64((y + height) * scale) - return clipBound -} - -func intersect(r1, r2 [4]float64) [4]float64 { - if r1[0] < r2[0] { - r1[0] = r2[0] - } - if r1[2] > r2[2] { - r1[2] = r2[2] - } - if r1[0] > r1[2] { - r1[0] = r1[2] - } - - if r1[1] < r2[1] { - r1[1] = r2[1] - } - if r1[3] > r2[3] { - r1[3] = r2[3] - } - if r1[1] > r1[3] { - r1[1] = r1[3] - } - return r1 -} - -func (r *Rasterizer8BitsSample) RenderEvenOdd(img *image.RGBA, color *color.RGBA, polygon *Polygon, tr [6]float64) { - // memset 0 the mask buffer - r.MaskBuffer = make([]SUBPIXEL_DATA, r.BufferWidth*r.Height) - - // inline matrix multiplication - transform := [6]float64{ - tr[0]*r.RemappingMatrix[0] + tr[1]*r.RemappingMatrix[2], - tr[1]*r.RemappingMatrix[3] + tr[0]*r.RemappingMatrix[1], - tr[2]*r.RemappingMatrix[0] + tr[3]*r.RemappingMatrix[2], - tr[3]*r.RemappingMatrix[3] + tr[2]*r.RemappingMatrix[1], - tr[4]*r.RemappingMatrix[0] + tr[5]*r.RemappingMatrix[2] + r.RemappingMatrix[4], - tr[5]*r.RemappingMatrix[3] + tr[4]*r.RemappingMatrix[1] + r.RemappingMatrix[5], - } - - clipRect := clip(img.Bounds().Min.X, img.Bounds().Min.Y, img.Bounds().Dx(), img.Bounds().Dy(), SUBPIXEL_COUNT) - clipRect = intersect(clipRect, r.ClipBound) - p := 0 - l := len(*polygon) / 2 - var edges [32]PolygonEdge - for p < l { - edgeCount := polygon.getEdges(p, 16, edges[:], transform, clipRect) - for k := 0; k < edgeCount; k++ { - r.addEvenOddEdge(&edges[k]) - } - p += 16 - } - - r.fillEvenOdd(img, color, clipRect) -} - -//! Adds an edge to be used with even-odd fill. -func (r *Rasterizer8BitsSample) addEvenOddEdge(edge *PolygonEdge) { - x := Fix(edge.X * FIXED_FLOAT_COEF) - slope := Fix(edge.Slope * FIXED_FLOAT_COEF) - slopeFix := Fix(0) - if edge.LastLine-edge.FirstLine >= SLOPE_FIX_STEP { - slopeFix = Fix(edge.Slope*SLOPE_FIX_STEP*FIXED_FLOAT_COEF) - slope<<SLOPE_FIX_SHIFT - } - - var mask SUBPIXEL_DATA - var ySub uint32 - var xp, yLine int - for y := edge.FirstLine; y <= edge.LastLine; y++ { - ySub = uint32(y & (SUBPIXEL_COUNT - 1)) - xp = int((x + SUBPIXEL_OFFSETS[ySub]) >> FIXED_SHIFT) - mask = SUBPIXEL_DATA(1 << ySub) - yLine = y >> SUBPIXEL_SHIFT - r.MaskBuffer[yLine*r.BufferWidth+xp] ^= mask - x += slope - if y&SLOPE_FIX_MASK == 0 { - x += slopeFix - } - } -} - -//! Adds an edge to be used with non-zero winding fill. -func (r *Rasterizer8BitsSample) addNonZeroEdge(edge *PolygonEdge) { - x := Fix(edge.X * FIXED_FLOAT_COEF) - slope := Fix(edge.Slope * FIXED_FLOAT_COEF) - slopeFix := Fix(0) - if edge.LastLine-edge.FirstLine >= SLOPE_FIX_STEP { - slopeFix = Fix(edge.Slope*SLOPE_FIX_STEP*FIXED_FLOAT_COEF) - slope<<SLOPE_FIX_SHIFT - } - var mask SUBPIXEL_DATA - var ySub uint32 - var xp, yLine int - winding := NON_ZERO_MASK_DATA_UNIT(edge.Winding) - for y := edge.FirstLine; y <= edge.LastLine; y++ { - ySub = uint32(y & (SUBPIXEL_COUNT - 1)) - xp = int((x + SUBPIXEL_OFFSETS[ySub]) >> FIXED_SHIFT) - mask = SUBPIXEL_DATA(1 << ySub) - yLine = y >> SUBPIXEL_SHIFT - r.MaskBuffer[yLine*r.BufferWidth+xp] |= mask - r.WindingBuffer[(yLine*r.BufferWidth+xp)*SUBPIXEL_COUNT+int(ySub)] += winding - x += slope - if y&SLOPE_FIX_MASK == 0 { - x += slopeFix - } - } -} - -// Renders the mask to the canvas with even-odd fill. -func (r *Rasterizer8BitsSample) fillEvenOdd(img *image.RGBA, color *color.RGBA, clipBound [4]float64) { - var x, y uint32 - - minX := uint32(clipBound[0]) - maxX := uint32(clipBound[2]) - - minY := uint32(clipBound[1]) >> SUBPIXEL_SHIFT - maxY := uint32(clipBound[3]) >> SUBPIXEL_SHIFT - - //pixColor := (uint32(color.R) << 24) | (uint32(color.G) << 16) | (uint32(color.B) << 8) | uint32(color.A) - pixColor := (*uint32)(unsafe.Pointer(color)) - cs1 := *pixColor & 0xff00ff - cs2 := *pixColor >> 8 & 0xff00ff - - stride := uint32(img.Stride) - var mask SUBPIXEL_DATA - - for y = minY; y < maxY; y++ { - tp := img.Pix[y*stride:] - - mask = 0 - for x = minX; x <= maxX; x++ { - p := (*uint32)(unsafe.Pointer(&tp[x])) - mask ^= r.MaskBuffer[y*uint32(r.BufferWidth)+x] - // 8bits - //alpha := uint32(coverageTable[mask]) - // 16bits - //alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff]) - // 32bits - alpha := uint32(coverageTable[mask&0xff] + coverageTable[mask>>8&0xff] + coverageTable[mask>>16&0xff] + coverageTable[mask>>24&0xff]) - - // alpha is in range of 0 to SUBPIXEL_COUNT - invAlpha := uint32(SUBPIXEL_COUNT) - alpha - - ct1 := *p & 0xff00ff * invAlpha - ct2 := *p >> 8 & 0xff00ff * invAlpha - - ct1 = (ct1 + cs1*alpha) >> SUBPIXEL_SHIFT & 0xff00ff - ct2 = (ct2 + cs2*alpha) << (8 - SUBPIXEL_SHIFT) & 0xff00ff00 - - *p = ct1 + ct2 - } - } -} - -/* - * Renders the polygon with non-zero winding fill. - * param aTarget the target bitmap. - * param aPolygon the polygon to render. - * param aColor the color to be used for rendering. - * param aTransformation the transformation matrix. - */ -func (r *Rasterizer8BitsSample) RenderNonZeroWinding(img *image.RGBA, color *color.RGBA, polygon *Polygon, tr [6]float64) { - - r.MaskBuffer = make([]SUBPIXEL_DATA, r.BufferWidth*r.Height) - r.WindingBuffer = make([]NON_ZERO_MASK_DATA_UNIT, r.BufferWidth*r.Height*SUBPIXEL_COUNT) - - // inline matrix multiplication - transform := [6]float64{ - tr[0]*r.RemappingMatrix[0] + tr[1]*r.RemappingMatrix[2], - tr[1]*r.RemappingMatrix[3] + tr[0]*r.RemappingMatrix[1], - tr[2]*r.RemappingMatrix[0] + tr[3]*r.RemappingMatrix[2], - tr[3]*r.RemappingMatrix[3] + tr[2]*r.RemappingMatrix[1], - tr[4]*r.RemappingMatrix[0] + tr[5]*r.RemappingMatrix[2] + r.RemappingMatrix[4], - tr[5]*r.RemappingMatrix[3] + tr[4]*r.RemappingMatrix[1] + r.RemappingMatrix[5], - } - - clipRect := clip(img.Bounds().Min.X, img.Bounds().Min.Y, img.Bounds().Dx(), img.Bounds().Dy(), SUBPIXEL_COUNT) - clipRect = intersect(clipRect, r.ClipBound) - - p := 0 - l := len(*polygon) / 2 - var edges [32]PolygonEdge - for p < l { - edgeCount := polygon.getEdges(p, 16, edges[:], transform, clipRect) - for k := 0; k < edgeCount; k++ { - r.addNonZeroEdge(&edges[k]) - } - p += 16 - } - - r.fillNonZero(img, color, clipRect) -} - -//! Renders the mask to the canvas with non-zero winding fill. -func (r *Rasterizer8BitsSample) fillNonZero(img *image.RGBA, color *color.RGBA, clipBound [4]float64) { - var x, y uint32 - - minX := uint32(clipBound[0]) - maxX := uint32(clipBound[2]) - - minY := uint32(clipBound[1]) >> SUBPIXEL_SHIFT - maxY := uint32(clipBound[3]) >> SUBPIXEL_SHIFT - - //pixColor := (uint32(color.R) << 24) | (uint32(color.G) << 16) | (uint32(color.B) << 8) | uint32(color.A) - pixColor := (*uint32)(unsafe.Pointer(color)) - cs1 := *pixColor & 0xff00ff - cs2 := *pixColor >> 8 & 0xff00ff - - stride := uint32(img.Stride) - var mask SUBPIXEL_DATA - var n uint32 - var values [SUBPIXEL_COUNT]NON_ZERO_MASK_DATA_UNIT - for n = 0; n < SUBPIXEL_COUNT; n++ { - values[n] = 0 - } - - for y = minY; y < maxY; y++ { - tp := img.Pix[y*stride:] - - mask = 0 - for x = minX; x <= maxX; x++ { - p := (*uint32)(unsafe.Pointer(&tp[x])) - temp := r.MaskBuffer[y*uint32(r.BufferWidth)+x] - if temp != 0 { - var bit SUBPIXEL_DATA = 1 - for n = 0; n < SUBPIXEL_COUNT; n++ { - if temp&bit != 0 { - t := values[n] - values[n] += r.WindingBuffer[(y*uint32(r.BufferWidth)+x)*SUBPIXEL_COUNT+n] - if (t == 0 || values[n] == 0) && t != values[n] { - mask ^= bit - } - } - bit <<= 1 - } - } - - // 8bits - //alpha := uint32(coverageTable[mask]) - // 16bits - //alpha := uint32(coverageTable[mask & 0xff] + coverageTable[(mask >> 8) & 0xff]) - // 32bits - alpha := uint32(coverageTable[mask&0xff] + coverageTable[mask>>8&0xff] + coverageTable[mask>>16&0xff] + coverageTable[mask>>24&0xff]) - - // alpha is in range of 0 to SUBPIXEL_COUNT - invAlpha := uint32(SUBPIXEL_COUNT) - alpha - - ct1 := *p & 0xff00ff * invAlpha - ct2 := *p >> 8 & 0xff00ff * invAlpha - - ct1 = (ct1 + cs1*alpha) >> SUBPIXEL_SHIFT & 0xff00ff - ct2 = (ct2 + cs2*alpha) << (8 - SUBPIXEL_SHIFT) & 0xff00ff00 - - *p = ct1 + ct2 - } - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/fixed_point.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/fixed_point.go deleted file mode 100644 index 14b8419c3..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/fixed_point.go +++ /dev/null @@ -1,17 +0,0 @@ -package raster - -type Fix int32 - -const ( - FIXED_SHIFT = 16 - FIXED_FLOAT_COEF = 1 << FIXED_SHIFT -) - -/*! Fixed point math inevitably introduces rounding error to the DDA. The error is - * fixed every now and then by a separate fix value. The defines below set these. - */ -const ( - SLOPE_FIX_SHIFT = 8 - SLOPE_FIX_STEP = 1 << SLOPE_FIX_SHIFT - SLOPE_FIX_MASK = SLOPE_FIX_STEP - 1 -) diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/line.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/line.go deleted file mode 100644 index 6f6d8863f..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/line.go +++ /dev/null @@ -1,55 +0,0 @@ -// Copyright 2011 The draw2d Authors. All rights reserved. -// created: 27/05/2011 by Laurent Le Goff -package raster - -import ( - "image/color" - "image/draw" -) - -func abs(i int) int { - if i < 0 { - return -i - } - return i -} - -func PolylineBresenham(img draw.Image, c color.Color, s ...float64) { - for i := 2; i < len(s); i += 2 { - Bresenham(img, c, int(s[i-2]+0.5), int(s[i-1]+0.5), int(s[i]+0.5), int(s[i+1]+0.5)) - } -} - -func Bresenham(img draw.Image, color color.Color, x0, y0, x1, y1 int) { - dx := abs(x1 - x0) - dy := abs(y1 - y0) - var sx, sy int - if x0 < x1 { - sx = 1 - } else { - sx = -1 - } - if y0 < y1 { - sy = 1 - } else { - sy = -1 - } - err := dx - dy - - var e2 int - for { - img.Set(x0, y0, color) - if x0 == x1 && y0 == y1 { - return - } - e2 = 2 * err - if e2 > -dy { - err = err - dy - x0 = x0 + sx - } - if e2 < dx { - err = err + dx - y0 = y0 + sy - } - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/polygon.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/polygon.go deleted file mode 100644 index 2a19e7355..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/polygon.go +++ /dev/null @@ -1,581 +0,0 @@ -// Copyright 2011 The draw2d Authors. All rights reserved. -// created: 27/05/2011 by Laurent Le Goff -package raster - -const ( - POLYGON_CLIP_NONE = iota - POLYGON_CLIP_LEFT - POLYGON_CLIP_RIGHT - POLYGON_CLIP_TOP - POLYGON_CLIP_BOTTOM -) - -type Polygon []float64 - -type PolygonEdge struct { - X, Slope float64 - FirstLine, LastLine int - Winding int16 -} - -//! A more optimized representation of a polygon edge. -type PolygonScanEdge struct { - FirstLine, LastLine int - Winding int16 - X Fix - Slope Fix - SlopeFix Fix - NextEdge *PolygonScanEdge -} - -//! Calculates the edges of the polygon with transformation and clipping to edges array. -/*! \param startIndex the index for the first vertex. - * \param vertexCount the amount of vertices to convert. - * \param edges the array for result edges. This should be able to contain 2*aVertexCount edges. - * \param tr the transformation matrix for the polygon. - * \param aClipRectangle the clip rectangle. - * \return the amount of edges in the result. - */ -func (p Polygon) getEdges(startIndex, vertexCount int, edges []PolygonEdge, tr [6]float64, clipBound [4]float64) int { - startIndex = startIndex * 2 - endIndex := startIndex + vertexCount*2 - if endIndex > len(p) { - endIndex = len(p) - } - - x := p[startIndex] - y := p[startIndex+1] - // inline transformation - prevX := x*tr[0] + y*tr[2] + tr[4] - prevY := x*tr[1] + y*tr[3] + tr[5] - - //! Calculates the clip flags for a point. - prevClipFlags := POLYGON_CLIP_NONE - if prevX < clipBound[0] { - prevClipFlags |= POLYGON_CLIP_LEFT - } else if prevX >= clipBound[2] { - prevClipFlags |= POLYGON_CLIP_RIGHT - } - - if prevY < clipBound[1] { - prevClipFlags |= POLYGON_CLIP_TOP - } else if prevY >= clipBound[3] { - prevClipFlags |= POLYGON_CLIP_BOTTOM - } - - edgeCount := 0 - var k, clipFlags, clipSum, clipUnion int - var xleft, yleft, xright, yright, oldY, maxX, minX float64 - var swapWinding int16 - for n := startIndex; n < endIndex; n = n + 2 { - k = (n + 2) % len(p) - x = p[k]*tr[0] + p[k+1]*tr[2] + tr[4] - y = p[k]*tr[1] + p[k+1]*tr[3] + tr[5] - - //! Calculates the clip flags for a point. - clipFlags = POLYGON_CLIP_NONE - if prevX < clipBound[0] { - clipFlags |= POLYGON_CLIP_LEFT - } else if prevX >= clipBound[2] { - clipFlags |= POLYGON_CLIP_RIGHT - } - if prevY < clipBound[1] { - clipFlags |= POLYGON_CLIP_TOP - } else if prevY >= clipBound[3] { - clipFlags |= POLYGON_CLIP_BOTTOM - } - - clipSum = prevClipFlags | clipFlags - clipUnion = prevClipFlags & clipFlags - - // Skip all edges that are either completely outside at the top or at the bottom. - if clipUnion&(POLYGON_CLIP_TOP|POLYGON_CLIP_BOTTOM) == 0 { - if clipUnion&POLYGON_CLIP_RIGHT != 0 { - // Both clip to right, edge is a vertical line on the right side - if getVerticalEdge(prevY, y, clipBound[2], &edges[edgeCount], clipBound) { - edgeCount++ - } - } else if clipUnion&POLYGON_CLIP_LEFT != 0 { - // Both clip to left, edge is a vertical line on the left side - if getVerticalEdge(prevY, y, clipBound[0], &edges[edgeCount], clipBound) { - edgeCount++ - } - } else if clipSum&(POLYGON_CLIP_RIGHT|POLYGON_CLIP_LEFT) == 0 { - // No clipping in the horizontal direction - if getEdge(prevX, prevY, x, y, &edges[edgeCount], clipBound) { - edgeCount++ - } - } else { - // Clips to left or right or both. - - if x < prevX { - xleft, yleft = x, y - xright, yright = prevX, prevY - swapWinding = -1 - } else { - xleft, yleft = prevX, prevY - xright, yright = x, y - swapWinding = 1 - } - - slope := (yright - yleft) / (xright - xleft) - - if clipSum&POLYGON_CLIP_RIGHT != 0 { - // calculate new position for the right vertex - oldY = yright - maxX = clipBound[2] - - yright = yleft + (maxX-xleft)*slope - xright = maxX - - // add vertical edge for the overflowing part - if getVerticalEdge(yright, oldY, maxX, &edges[edgeCount], clipBound) { - edges[edgeCount].Winding *= swapWinding - edgeCount++ - } - } - - if clipSum&POLYGON_CLIP_LEFT != 0 { - // calculate new position for the left vertex - oldY = yleft - minX = clipBound[0] - - yleft = yleft + (minX-xleft)*slope - xleft = minX - - // add vertical edge for the overflowing part - if getVerticalEdge(oldY, yleft, minX, &edges[edgeCount], clipBound) { - edges[edgeCount].Winding *= swapWinding - edgeCount++ - } - } - - if getEdge(xleft, yleft, xright, yright, &edges[edgeCount], clipBound) { - edges[edgeCount].Winding *= swapWinding - edgeCount++ - } - } - } - - prevClipFlags = clipFlags - prevX = x - prevY = y - } - - return edgeCount -} - -//! Creates a polygon edge between two vectors. -/*! Clips the edge vertically to the clip rectangle. Returns true for edges that - * should be rendered, false for others. - */ -func getEdge(x0, y0, x1, y1 float64, edge *PolygonEdge, clipBound [4]float64) bool { - var startX, startY, endX, endY float64 - var winding int16 - - if y0 <= y1 { - startX = x0 - startY = y0 - endX = x1 - endY = y1 - winding = 1 - } else { - startX = x1 - startY = y1 - endX = x0 - endY = y0 - winding = -1 - } - - // Essentially, firstLine is floor(startY + 1) and lastLine is floor(endY). - // These are refactored to integer casts in order to avoid function - // calls. The difference with integer cast is that numbers are always - // rounded towards zero. Since values smaller than zero get clipped away, - // only coordinates between 0 and -1 require greater attention as they - // also round to zero. The problems in this range can be avoided by - // adding one to the values before conversion and subtracting after it. - - firstLine := int(startY + 1) - lastLine := int(endY+1) - 1 - - minClip := int(clipBound[1]) - maxClip := int(clipBound[3]) - - // If start and end are on the same line, the edge doesn't cross - // any lines and thus can be ignored. - // If the end is smaller than the first line, edge is out. - // If the start is larger than the last line, edge is out. - if firstLine > lastLine || lastLine < minClip || firstLine >= maxClip { - return false - } - - // Adjust the start based on the target. - if firstLine < minClip { - firstLine = minClip - } - - if lastLine >= maxClip { - lastLine = maxClip - 1 - } - edge.Slope = (endX - startX) / (endY - startY) - edge.X = startX + (float64(firstLine)-startY)*edge.Slope - edge.Winding = winding - edge.FirstLine = firstLine - edge.LastLine = lastLine - - return true -} - -//! Creates a vertical polygon edge between two y values. -/*! Clips the edge vertically to the clip rectangle. Returns true for edges that - * should be rendered, false for others. - */ -func getVerticalEdge(startY, endY, x float64, edge *PolygonEdge, clipBound [4]float64) bool { - var start, end float64 - var winding int16 - if startY < endY { - start = startY - end = endY - winding = 1 - } else { - start = endY - end = startY - winding = -1 - } - - firstLine := int(start + 1) - lastLine := int(end+1) - 1 - - minClip := int(clipBound[1]) - maxClip := int(clipBound[3]) - - // If start and end are on the same line, the edge doesn't cross - // any lines and thus can be ignored. - // If the end is smaller than the first line, edge is out. - // If the start is larger than the last line, edge is out. - if firstLine > lastLine || lastLine < minClip || firstLine >= maxClip { - return false - } - - // Adjust the start based on the clip rect. - if firstLine < minClip { - firstLine = minClip - } - if lastLine >= maxClip { - lastLine = maxClip - 1 - } - - edge.Slope = 0 - edge.X = x - edge.Winding = winding - edge.FirstLine = firstLine - edge.LastLine = lastLine - - return true -} - -type VertexData struct { - X, Y float64 - ClipFlags int - Line int -} - -//! Calculates the edges of the polygon with transformation and clipping to edges array. -/*! Note that this may return upto three times the amount of edges that the polygon has vertices, - * in the unlucky case where both left and right side get clipped for all edges. - * \param edges the array for result edges. This should be able to contain 2*aVertexCount edges. - * \param aTransformation the transformation matrix for the polygon. - * \param aClipRectangle the clip rectangle. - * \return the amount of edges in the result. - */ -func (p Polygon) getScanEdges(edges []PolygonScanEdge, tr [6]float64, clipBound [4]float64) int { - var n int - vertexData := make([]VertexData, len(p)/2+1) - for n = 0; n < len(vertexData)-1; n = n + 1 { - k := n * 2 - vertexData[n].X = p[k]*tr[0] + p[k+1]*tr[2] + tr[4] - vertexData[n].Y = p[k]*tr[1] + p[k+1]*tr[3] + tr[5] - // Calculate clip flags for all vertices. - vertexData[n].ClipFlags = POLYGON_CLIP_NONE - if vertexData[n].X < clipBound[0] { - vertexData[n].ClipFlags |= POLYGON_CLIP_LEFT - } else if vertexData[n].X >= clipBound[2] { - vertexData[n].ClipFlags |= POLYGON_CLIP_RIGHT - } - if vertexData[n].Y < clipBound[1] { - vertexData[n].ClipFlags |= POLYGON_CLIP_TOP - } else if vertexData[n].Y >= clipBound[3] { - vertexData[n].ClipFlags |= POLYGON_CLIP_BOTTOM - } - - // Calculate line of the vertex. If the vertex is clipped by top or bottom, the line - // is determined by the clip rectangle. - if vertexData[n].ClipFlags&POLYGON_CLIP_TOP != 0 { - vertexData[n].Line = int(clipBound[1]) - } else if vertexData[n].ClipFlags&POLYGON_CLIP_BOTTOM != 0 { - vertexData[n].Line = int(clipBound[3] - 1) - } else { - vertexData[n].Line = int(vertexData[n].Y+1) - 1 - } - } - - // Copy the data from 0 to the last entry to make the data to loop. - vertexData[len(vertexData)-1] = vertexData[0] - - // Transform the first vertex; store. - // Process mVertexCount - 1 times, next is n+1 - // copy the first vertex to - // Process 1 time, next is n - - edgeCount := 0 - for n = 0; n < len(vertexData)-1; n++ { - clipSum := vertexData[n].ClipFlags | vertexData[n+1].ClipFlags - clipUnion := vertexData[n].ClipFlags & vertexData[n+1].ClipFlags - - if clipUnion&(POLYGON_CLIP_TOP|POLYGON_CLIP_BOTTOM) == 0 && - vertexData[n].Line != vertexData[n+1].Line { - var startIndex, endIndex int - var winding int16 - if vertexData[n].Y < vertexData[n+1].Y { - startIndex = n - endIndex = n + 1 - winding = 1 - } else { - startIndex = n + 1 - endIndex = n - winding = -1 - } - - firstLine := vertexData[startIndex].Line + 1 - lastLine := vertexData[endIndex].Line - - if clipUnion&POLYGON_CLIP_RIGHT != 0 { - // Both clip to right, edge is a vertical line on the right side - edges[edgeCount].FirstLine = firstLine - edges[edgeCount].LastLine = lastLine - edges[edgeCount].Winding = winding - edges[edgeCount].X = Fix(clipBound[2] * FIXED_FLOAT_COEF) - edges[edgeCount].Slope = 0 - edges[edgeCount].SlopeFix = 0 - - edgeCount++ - } else if clipUnion&POLYGON_CLIP_LEFT != 0 { - // Both clip to left, edge is a vertical line on the left side - edges[edgeCount].FirstLine = firstLine - edges[edgeCount].LastLine = lastLine - edges[edgeCount].Winding = winding - edges[edgeCount].X = Fix(clipBound[0] * FIXED_FLOAT_COEF) - edges[edgeCount].Slope = 0 - edges[edgeCount].SlopeFix = 0 - - edgeCount++ - } else if clipSum&(POLYGON_CLIP_RIGHT|POLYGON_CLIP_LEFT) == 0 { - // No clipping in the horizontal direction - slope := (vertexData[endIndex].X - - vertexData[startIndex].X) / - (vertexData[endIndex].Y - - vertexData[startIndex].Y) - - // If there is vertical clip (for the top) it will be processed here. The calculation - // should be done for all non-clipping edges as well to determine the accurate position - // where the edge crosses the first scanline. - startx := vertexData[startIndex].X + - (float64(firstLine)-vertexData[startIndex].Y)*slope - - edges[edgeCount].FirstLine = firstLine - edges[edgeCount].LastLine = lastLine - edges[edgeCount].Winding = winding - edges[edgeCount].X = Fix(startx * FIXED_FLOAT_COEF) - edges[edgeCount].Slope = Fix(slope * FIXED_FLOAT_COEF) - - if lastLine-firstLine >= SLOPE_FIX_STEP { - edges[edgeCount].SlopeFix = Fix(slope*SLOPE_FIX_STEP*FIXED_FLOAT_COEF) - - edges[edgeCount].Slope<<SLOPE_FIX_SHIFT - } else { - edges[edgeCount].SlopeFix = 0 - } - - edgeCount++ - } else { - // Clips to left or right or both. - slope := (vertexData[endIndex].X - - vertexData[startIndex].X) / - (vertexData[endIndex].Y - - vertexData[startIndex].Y) - - // The edge may clip to both left and right. - // The clip results in one or two new vertices, and one to three segments. - // The rounding for scanlines may produce a result where any of the segments is - // ignored. - - // The start is always above the end. Calculate the clip positions to clipVertices. - // It is possible that only one of the vertices exist. This will be detected from the - // clip flags of the vertex later, so they are initialized here. - var clipVertices [2]VertexData - - if vertexData[startIndex].X < - vertexData[endIndex].X { - clipVertices[0].X = clipBound[0] - clipVertices[1].X = clipBound[2] - clipVertices[0].ClipFlags = POLYGON_CLIP_LEFT - clipVertices[1].ClipFlags = POLYGON_CLIP_RIGHT - } else { - clipVertices[0].X = clipBound[2] - clipVertices[1].X = clipBound[0] - clipVertices[0].ClipFlags = POLYGON_CLIP_RIGHT - clipVertices[1].ClipFlags = POLYGON_CLIP_LEFT - } - - var p int - for p = 0; p < 2; p++ { - // Check if either of the vertices crosses the edge marked for the clip vertex - if clipSum&clipVertices[p].ClipFlags != 0 { - // The the vertex is required, calculate it. - clipVertices[p].Y = vertexData[startIndex].Y + - (clipVertices[p].X- - vertexData[startIndex].X)/slope - - // If there is clipping in the vertical direction, the new vertex may be clipped. - if clipSum&(POLYGON_CLIP_TOP|POLYGON_CLIP_BOTTOM) != 0 { - if clipVertices[p].Y < clipBound[1] { - clipVertices[p].ClipFlags = POLYGON_CLIP_TOP - clipVertices[p].Line = int(clipBound[1]) - } else if clipVertices[p].Y > clipBound[3] { - clipVertices[p].ClipFlags = POLYGON_CLIP_BOTTOM - clipVertices[p].Line = int(clipBound[3] - 1) - } else { - clipVertices[p].ClipFlags = 0 - clipVertices[p].Line = int(clipVertices[p].Y+1) - 1 - } - } else { - clipVertices[p].ClipFlags = 0 - clipVertices[p].Line = int(clipVertices[p].Y+1) - 1 - } - } - } - - // Now there are three or four vertices, in the top-to-bottom order of start, clip0, clip1, - // end. What kind of edges are required for connecting these can be determined from the - // clip flags. - // -if clip vertex has horizontal clip flags, it doesn't exist. No edge is generated. - // -if start vertex or end vertex has horizontal clip flag, the edge to/from the clip vertex is vertical - // -if the line of two vertices is the same, the edge is not generated, since the edge doesn't - // cross any scanlines. - - // The alternative patterns are: - // start - clip0 - clip1 - end - // start - clip0 - end - // start - clip1 - end - - var topClipIndex, bottomClipIndex int - if (clipVertices[0].ClipFlags|clipVertices[1].ClipFlags)& - (POLYGON_CLIP_LEFT|POLYGON_CLIP_RIGHT) == 0 { - // Both sides are clipped, the order is start-clip0-clip1-end - topClipIndex = 0 - bottomClipIndex = 1 - - // Add the edge from clip0 to clip1 - // Check that the line is different for the vertices. - if clipVertices[0].Line != clipVertices[1].Line { - firstClipLine := clipVertices[0].Line + 1 - - startx := vertexData[startIndex].X + - (float64(firstClipLine)-vertexData[startIndex].Y)*slope - - edges[edgeCount].X = Fix(startx * FIXED_FLOAT_COEF) - edges[edgeCount].Slope = Fix(slope * FIXED_FLOAT_COEF) - edges[edgeCount].FirstLine = firstClipLine - edges[edgeCount].LastLine = clipVertices[1].Line - edges[edgeCount].Winding = winding - - if edges[edgeCount].LastLine-edges[edgeCount].FirstLine >= SLOPE_FIX_STEP { - edges[edgeCount].SlopeFix = Fix(slope*SLOPE_FIX_STEP*FIXED_FLOAT_COEF) - - edges[edgeCount].Slope<<SLOPE_FIX_SHIFT - } else { - edges[edgeCount].SlopeFix = 0 - } - - edgeCount++ - } - } else { - // Clip at either side, check which side. The clip flag is on for the vertex - // that doesn't exist, i.e. has not been clipped to be inside the rect. - if clipVertices[0].ClipFlags&(POLYGON_CLIP_LEFT|POLYGON_CLIP_RIGHT) != 0 { - topClipIndex = 1 - bottomClipIndex = 1 - } else { - topClipIndex = 0 - bottomClipIndex = 0 - } - } - - // Generate the edges from start - clip top and clip bottom - end - // Clip top and clip bottom may be the same vertex if there is only one - // clipped vertex. - - // Check that the line is different for the vertices. - if vertexData[startIndex].Line != clipVertices[topClipIndex].Line { - edges[edgeCount].FirstLine = firstLine - edges[edgeCount].LastLine = clipVertices[topClipIndex].Line - edges[edgeCount].Winding = winding - - // If startIndex is clipped, the edge is a vertical one. - if vertexData[startIndex].ClipFlags&(POLYGON_CLIP_LEFT|POLYGON_CLIP_RIGHT) != 0 { - edges[edgeCount].X = Fix(clipVertices[topClipIndex].X * FIXED_FLOAT_COEF) - edges[edgeCount].Slope = 0 - edges[edgeCount].SlopeFix = 0 - } else { - startx := vertexData[startIndex].X + - (float64(firstLine)-vertexData[startIndex].Y)*slope - - edges[edgeCount].X = Fix(startx * FIXED_FLOAT_COEF) - edges[edgeCount].Slope = Fix(slope * FIXED_FLOAT_COEF) - - if edges[edgeCount].LastLine-edges[edgeCount].FirstLine >= SLOPE_FIX_STEP { - edges[edgeCount].SlopeFix = Fix(slope*SLOPE_FIX_STEP*FIXED_FLOAT_COEF) - - edges[edgeCount].Slope<<SLOPE_FIX_SHIFT - } else { - edges[edgeCount].SlopeFix = 0 - } - } - - edgeCount++ - } - - // Check that the line is different for the vertices. - if clipVertices[bottomClipIndex].Line != vertexData[endIndex].Line { - firstClipLine := clipVertices[bottomClipIndex].Line + 1 - - edges[edgeCount].FirstLine = firstClipLine - edges[edgeCount].LastLine = lastLine - edges[edgeCount].Winding = winding - - // If endIndex is clipped, the edge is a vertical one. - if vertexData[endIndex].ClipFlags&(POLYGON_CLIP_LEFT|POLYGON_CLIP_RIGHT) != 0 { - edges[edgeCount].X = Fix(clipVertices[bottomClipIndex].X * FIXED_FLOAT_COEF) - edges[edgeCount].Slope = 0 - edges[edgeCount].SlopeFix = 0 - } else { - startx := vertexData[startIndex].X + - (float64(firstClipLine)-vertexData[startIndex].Y)*slope - - edges[edgeCount].X = Fix(startx * FIXED_FLOAT_COEF) - edges[edgeCount].Slope = Fix(slope * FIXED_FLOAT_COEF) - - if edges[edgeCount].LastLine-edges[edgeCount].FirstLine >= SLOPE_FIX_STEP { - edges[edgeCount].SlopeFix = Fix(slope*SLOPE_FIX_STEP*FIXED_FLOAT_COEF) - - edges[edgeCount].Slope<<SLOPE_FIX_SHIFT - } else { - edges[edgeCount].SlopeFix = 0 - } - } - - edgeCount++ - } - - } - } - } - - return edgeCount -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/raster_test.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/raster_test.go deleted file mode 100644 index 7872d8d03..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/raster/raster_test.go +++ /dev/null @@ -1,200 +0,0 @@ -package raster - -import ( - "bufio" - "code.google.com/p/draw2d/draw2d/curve" - "code.google.com/p/freetype-go/freetype/raster" - "image" - "image/color" - "image/png" - "log" - "os" - "testing" -) - -var flattening_threshold float64 = 0.5 - -func savepng(filePath string, m image.Image) { - f, err := os.Create(filePath) - if err != nil { - log.Println(err) - os.Exit(1) - } - defer f.Close() - b := bufio.NewWriter(f) - err = png.Encode(b, m) - if err != nil { - log.Println(err) - os.Exit(1) - } - err = b.Flush() - if err != nil { - log.Println(err) - os.Exit(1) - } -} - -type Path struct { - points []float64 -} - -func (p *Path) LineTo(x, y float64) { - if len(p.points)+2 > cap(p.points) { - points := make([]float64, len(p.points)+2, len(p.points)+32) - copy(points, p.points) - p.points = points - } else { - p.points = p.points[0 : len(p.points)+2] - } - p.points[len(p.points)-2] = x - p.points[len(p.points)-1] = y -} - -func TestFreetype(t *testing.T) { - var p Path - p.LineTo(10, 190) - c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} - c.Segment(&p, flattening_threshold) - poly := Polygon(p.points) - color := color.RGBA{0, 0, 0, 0xff} - - img := image.NewRGBA(image.Rect(0, 0, 200, 200)) - rasterizer := raster.NewRasterizer(200, 200) - rasterizer.UseNonZeroWinding = false - rasterizer.Start(raster.Point{raster.Fix32(10 * 256), raster.Fix32(190 * 256)}) - for j := 0; j < len(poly); j = j + 2 { - rasterizer.Add1(raster.Point{raster.Fix32(poly[j] * 256), raster.Fix32(poly[j+1] * 256)}) - } - painter := raster.NewRGBAPainter(img) - painter.SetColor(color) - rasterizer.Rasterize(painter) - - savepng("_testFreetype.png", img) -} - -func TestFreetypeNonZeroWinding(t *testing.T) { - var p Path - p.LineTo(10, 190) - c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} - c.Segment(&p, flattening_threshold) - poly := Polygon(p.points) - color := color.RGBA{0, 0, 0, 0xff} - - img := image.NewRGBA(image.Rect(0, 0, 200, 200)) - rasterizer := raster.NewRasterizer(200, 200) - rasterizer.UseNonZeroWinding = true - rasterizer.Start(raster.Point{raster.Fix32(10 * 256), raster.Fix32(190 * 256)}) - for j := 0; j < len(poly); j = j + 2 { - rasterizer.Add1(raster.Point{raster.Fix32(poly[j] * 256), raster.Fix32(poly[j+1] * 256)}) - } - painter := raster.NewRGBAPainter(img) - painter.SetColor(color) - rasterizer.Rasterize(painter) - - savepng("_testFreetypeNonZeroWinding.png", img) -} - -func TestRasterizer(t *testing.T) { - img := image.NewRGBA(image.Rect(0, 0, 200, 200)) - var p Path - p.LineTo(10, 190) - c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} - c.Segment(&p, flattening_threshold) - poly := Polygon(p.points) - color := color.RGBA{0, 0, 0, 0xff} - tr := [6]float64{1, 0, 0, 1, 0, 0} - r := NewRasterizer8BitsSample(200, 200) - //PolylineBresenham(img, image.Black, poly...) - - r.RenderEvenOdd(img, &color, &poly, tr) - savepng("_testRasterizer.png", img) -} - -func TestRasterizerNonZeroWinding(t *testing.T) { - img := image.NewRGBA(image.Rect(0, 0, 200, 200)) - var p Path - p.LineTo(10, 190) - c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} - c.Segment(&p, flattening_threshold) - poly := Polygon(p.points) - color := color.RGBA{0, 0, 0, 0xff} - tr := [6]float64{1, 0, 0, 1, 0, 0} - r := NewRasterizer8BitsSample(200, 200) - //PolylineBresenham(img, image.Black, poly...) - - r.RenderNonZeroWinding(img, &color, &poly, tr) - savepng("_testRasterizerNonZeroWinding.png", img) -} - -func BenchmarkFreetype(b *testing.B) { - var p Path - p.LineTo(10, 190) - c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} - c.Segment(&p, flattening_threshold) - poly := Polygon(p.points) - color := color.RGBA{0, 0, 0, 0xff} - - for i := 0; i < b.N; i++ { - img := image.NewRGBA(image.Rect(0, 0, 200, 200)) - rasterizer := raster.NewRasterizer(200, 200) - rasterizer.UseNonZeroWinding = false - rasterizer.Start(raster.Point{raster.Fix32(10 * 256), raster.Fix32(190 * 256)}) - for j := 0; j < len(poly); j = j + 2 { - rasterizer.Add1(raster.Point{raster.Fix32(poly[j] * 256), raster.Fix32(poly[j+1] * 256)}) - } - painter := raster.NewRGBAPainter(img) - painter.SetColor(color) - rasterizer.Rasterize(painter) - } -} -func BenchmarkFreetypeNonZeroWinding(b *testing.B) { - var p Path - p.LineTo(10, 190) - c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} - c.Segment(&p, flattening_threshold) - poly := Polygon(p.points) - color := color.RGBA{0, 0, 0, 0xff} - - for i := 0; i < b.N; i++ { - img := image.NewRGBA(image.Rect(0, 0, 200, 200)) - rasterizer := raster.NewRasterizer(200, 200) - rasterizer.UseNonZeroWinding = true - rasterizer.Start(raster.Point{raster.Fix32(10 * 256), raster.Fix32(190 * 256)}) - for j := 0; j < len(poly); j = j + 2 { - rasterizer.Add1(raster.Point{raster.Fix32(poly[j] * 256), raster.Fix32(poly[j+1] * 256)}) - } - painter := raster.NewRGBAPainter(img) - painter.SetColor(color) - rasterizer.Rasterize(painter) - } -} - -func BenchmarkRasterizerNonZeroWinding(b *testing.B) { - var p Path - p.LineTo(10, 190) - c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} - c.Segment(&p, flattening_threshold) - poly := Polygon(p.points) - color := color.RGBA{0, 0, 0, 0xff} - tr := [6]float64{1, 0, 0, 1, 0, 0} - for i := 0; i < b.N; i++ { - img := image.NewRGBA(image.Rect(0, 0, 200, 200)) - rasterizer := NewRasterizer8BitsSample(200, 200) - rasterizer.RenderNonZeroWinding(img, &color, &poly, tr) - } -} - -func BenchmarkRasterizer(b *testing.B) { - var p Path - p.LineTo(10, 190) - c := curve.CubicCurveFloat64{10, 190, 10, 10, 190, 10, 190, 190} - c.Segment(&p, flattening_threshold) - poly := Polygon(p.points) - color := color.RGBA{0, 0, 0, 0xff} - tr := [6]float64{1, 0, 0, 1, 0, 0} - for i := 0; i < b.N; i++ { - img := image.NewRGBA(image.Rect(0, 0, 200, 200)) - rasterizer := NewRasterizer8BitsSample(200, 200) - rasterizer.RenderEvenOdd(img, &color, &poly, tr) - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/rgba_interpolation.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/rgba_interpolation.go deleted file mode 100644 index 92534e7eb..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/rgba_interpolation.go +++ /dev/null @@ -1,150 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff -// see http://pippin.gimp.org/image_processing/chap_resampling.html - -package draw2d - -import ( - "image" - "image/color" - "image/draw" - "math" -) - -type ImageFilter int - -const ( - LinearFilter ImageFilter = iota - BilinearFilter - BicubicFilter -) - -//see http://pippin.gimp.org/image_processing/chap_resampling.html -func getColorLinear(img image.Image, x, y float64) color.Color { - return img.At(int(x), int(y)) -} - -func getColorBilinear(img image.Image, x, y float64) color.Color { - x0 := math.Floor(x) - y0 := math.Floor(y) - dx := x - x0 - dy := y - y0 - - rt, gt, bt, at := img.At(int(x0), int(y0)).RGBA() - r0, g0, b0, a0 := float64(rt), float64(gt), float64(bt), float64(at) - rt, gt, bt, at = img.At(int(x0+1), int(y0)).RGBA() - r1, g1, b1, a1 := float64(rt), float64(gt), float64(bt), float64(at) - rt, gt, bt, at = img.At(int(x0+1), int(y0+1)).RGBA() - r2, g2, b2, a2 := float64(rt), float64(gt), float64(bt), float64(at) - rt, gt, bt, at = img.At(int(x0), int(y0+1)).RGBA() - r3, g3, b3, a3 := float64(rt), float64(gt), float64(bt), float64(at) - - r := int(lerp(lerp(r0, r1, dx), lerp(r3, r2, dx), dy)) - g := int(lerp(lerp(g0, g1, dx), lerp(g3, g2, dx), dy)) - b := int(lerp(lerp(b0, b1, dx), lerp(b3, b2, dx), dy)) - a := int(lerp(lerp(a0, a1, dx), lerp(a3, a2, dx), dy)) - return color.RGBA{uint8(r >> 8), uint8(g >> 8), uint8(b >> 8), uint8(a >> 8)} -} - -/** --- LERP --- /lerp/, vi.,n. --- --- Quasi-acronym for Linear Interpolation, used as a verb or noun for --- the operation. "Bresenham's algorithm lerps incrementally between the --- two endpoints of the line." (From Jargon File (4.4.4, 14 Aug 2003) -*/ -func lerp(v1, v2, ratio float64) float64 { - return v1*(1-ratio) + v2*ratio -} - -func getColorCubicRow(img image.Image, x, y, offset float64) color.Color { - c0 := img.At(int(x), int(y)) - c1 := img.At(int(x+1), int(y)) - c2 := img.At(int(x+2), int(y)) - c3 := img.At(int(x+3), int(y)) - rt, gt, bt, at := c0.RGBA() - r0, g0, b0, a0 := float64(rt), float64(gt), float64(bt), float64(at) - rt, gt, bt, at = c1.RGBA() - r1, g1, b1, a1 := float64(rt), float64(gt), float64(bt), float64(at) - rt, gt, bt, at = c2.RGBA() - r2, g2, b2, a2 := float64(rt), float64(gt), float64(bt), float64(at) - rt, gt, bt, at = c3.RGBA() - r3, g3, b3, a3 := float64(rt), float64(gt), float64(bt), float64(at) - r, g, b, a := cubic(offset, r0, r1, r2, r3), cubic(offset, g0, g1, g2, g3), cubic(offset, b0, b1, b2, b3), cubic(offset, a0, a1, a2, a3) - return color.RGBA{uint8(r >> 8), uint8(g >> 8), uint8(b >> 8), uint8(a >> 8)} -} - -func getColorBicubic(img image.Image, x, y float64) color.Color { - x0 := math.Floor(x) - y0 := math.Floor(y) - dx := x - x0 - dy := y - y0 - c0 := getColorCubicRow(img, x0-1, y0-1, dx) - c1 := getColorCubicRow(img, x0-1, y0, dx) - c2 := getColorCubicRow(img, x0-1, y0+1, dx) - c3 := getColorCubicRow(img, x0-1, y0+2, dx) - rt, gt, bt, at := c0.RGBA() - r0, g0, b0, a0 := float64(rt), float64(gt), float64(bt), float64(at) - rt, gt, bt, at = c1.RGBA() - r1, g1, b1, a1 := float64(rt), float64(gt), float64(bt), float64(at) - rt, gt, bt, at = c2.RGBA() - r2, g2, b2, a2 := float64(rt), float64(gt), float64(bt), float64(at) - rt, gt, bt, at = c3.RGBA() - r3, g3, b3, a3 := float64(rt), float64(gt), float64(bt), float64(at) - r, g, b, a := cubic(dy, r0, r1, r2, r3), cubic(dy, g0, g1, g2, g3), cubic(dy, b0, b1, b2, b3), cubic(dy, a0, a1, a2, a3) - return color.RGBA{uint8(r >> 8), uint8(g >> 8), uint8(b >> 8), uint8(a >> 8)} -} - -func cubic(offset, v0, v1, v2, v3 float64) uint32 { - // offset is the offset of the sampled value between v1 and v2 - return uint32(((((-7*v0+21*v1-21*v2+7*v3)*offset+ - (15*v0-36*v1+27*v2-6*v3))*offset+ - (-9*v0+9*v2))*offset + (v0 + 16*v1 + v2)) / 18.0) -} - -func DrawImage(src image.Image, dest draw.Image, tr MatrixTransform, op draw.Op, filter ImageFilter) { - bounds := src.Bounds() - x0, y0, x1, y1 := float64(bounds.Min.X), float64(bounds.Min.Y), float64(bounds.Max.X), float64(bounds.Max.Y) - tr.TransformRectangle(&x0, &y0, &x1, &y1) - var x, y, u, v float64 - var c1, c2, cr color.Color - var r, g, b, a, ia, r1, g1, b1, a1, r2, g2, b2, a2 uint32 - var color color.RGBA - for x = x0; x < x1; x++ { - for y = y0; y < y1; y++ { - u = x - v = y - tr.InverseTransform(&u, &v) - if bounds.Min.X <= int(u) && bounds.Max.X > int(u) && bounds.Min.Y <= int(v) && bounds.Max.Y > int(v) { - c1 = dest.At(int(x), int(y)) - switch filter { - case LinearFilter: - c2 = src.At(int(u), int(v)) - case BilinearFilter: - c2 = getColorBilinear(src, u, v) - case BicubicFilter: - c2 = getColorBicubic(src, u, v) - } - switch op { - case draw.Over: - r1, g1, b1, a1 = c1.RGBA() - r2, g2, b2, a2 = c2.RGBA() - ia = M - a2 - r = ((r1 * ia) / M) + r2 - g = ((g1 * ia) / M) + g2 - b = ((b1 * ia) / M) + b2 - a = ((a1 * ia) / M) + a2 - color.R = uint8(r >> 8) - color.G = uint8(g >> 8) - color.B = uint8(b >> 8) - color.A = uint8(a >> 8) - cr = color - default: - cr = c2 - } - dest.Set(int(x), int(y), cr) - } - } - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/stack_gc.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/stack_gc.go deleted file mode 100644 index b2cf63fc4..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/stack_gc.go +++ /dev/null @@ -1,208 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff - -package draw2d - -import ( - "code.google.com/p/freetype-go/freetype/truetype" - "image" - "image/color" -) - -type StackGraphicContext struct { - Current *ContextStack -} - -type ContextStack struct { - Tr MatrixTransform - Path *PathStorage - LineWidth float64 - Dash []float64 - DashOffset float64 - StrokeColor color.Color - FillColor color.Color - FillRule FillRule - Cap Cap - Join Join - FontSize float64 - FontData FontData - - font *truetype.Font - // fontSize and dpi are used to calculate scale. scale is the number of - // 26.6 fixed point units in 1 em. - scale int32 - - previous *ContextStack -} - -/** - * Create a new Graphic context from an image - */ -func NewStackGraphicContext() *StackGraphicContext { - gc := &StackGraphicContext{} - gc.Current = new(ContextStack) - gc.Current.Tr = NewIdentityMatrix() - gc.Current.Path = NewPathStorage() - gc.Current.LineWidth = 1.0 - gc.Current.StrokeColor = image.Black - gc.Current.FillColor = image.White - gc.Current.Cap = RoundCap - gc.Current.FillRule = FillRuleEvenOdd - gc.Current.Join = RoundJoin - gc.Current.FontSize = 10 - gc.Current.FontData = defaultFontData - return gc -} - -func (gc *StackGraphicContext) GetMatrixTransform() MatrixTransform { - return gc.Current.Tr -} - -func (gc *StackGraphicContext) SetMatrixTransform(Tr MatrixTransform) { - gc.Current.Tr = Tr -} - -func (gc *StackGraphicContext) ComposeMatrixTransform(Tr MatrixTransform) { - gc.Current.Tr = Tr.Multiply(gc.Current.Tr) -} - -func (gc *StackGraphicContext) Rotate(angle float64) { - gc.Current.Tr = NewRotationMatrix(angle).Multiply(gc.Current.Tr) -} - -func (gc *StackGraphicContext) Translate(tx, ty float64) { - gc.Current.Tr = NewTranslationMatrix(tx, ty).Multiply(gc.Current.Tr) -} - -func (gc *StackGraphicContext) Scale(sx, sy float64) { - gc.Current.Tr = NewScaleMatrix(sx, sy).Multiply(gc.Current.Tr) -} - -func (gc *StackGraphicContext) SetStrokeColor(c color.Color) { - gc.Current.StrokeColor = c -} - -func (gc *StackGraphicContext) SetFillColor(c color.Color) { - gc.Current.FillColor = c -} - -func (gc *StackGraphicContext) SetFillRule(f FillRule) { - gc.Current.FillRule = f -} - -func (gc *StackGraphicContext) SetLineWidth(LineWidth float64) { - gc.Current.LineWidth = LineWidth -} - -func (gc *StackGraphicContext) SetLineCap(Cap Cap) { - gc.Current.Cap = Cap -} - -func (gc *StackGraphicContext) SetLineJoin(Join Join) { - gc.Current.Join = Join -} - -func (gc *StackGraphicContext) SetLineDash(Dash []float64, DashOffset float64) { - gc.Current.Dash = Dash - gc.Current.DashOffset = DashOffset -} - -func (gc *StackGraphicContext) SetFontSize(FontSize float64) { - gc.Current.FontSize = FontSize -} - -func (gc *StackGraphicContext) GetFontSize() float64 { - return gc.Current.FontSize -} - -func (gc *StackGraphicContext) SetFontData(FontData FontData) { - gc.Current.FontData = FontData -} - -func (gc *StackGraphicContext) GetFontData() FontData { - return gc.Current.FontData -} - -func (gc *StackGraphicContext) BeginPath() { - gc.Current.Path.Clear() -} - -func (gc *StackGraphicContext) IsEmpty() bool { - return gc.Current.Path.IsEmpty() -} - -func (gc *StackGraphicContext) LastPoint() (float64, float64) { - return gc.Current.Path.LastPoint() -} - -func (gc *StackGraphicContext) MoveTo(x, y float64) { - gc.Current.Path.MoveTo(x, y) -} - -func (gc *StackGraphicContext) RMoveTo(dx, dy float64) { - gc.Current.Path.RMoveTo(dx, dy) -} - -func (gc *StackGraphicContext) LineTo(x, y float64) { - gc.Current.Path.LineTo(x, y) -} - -func (gc *StackGraphicContext) RLineTo(dx, dy float64) { - gc.Current.Path.RLineTo(dx, dy) -} - -func (gc *StackGraphicContext) QuadCurveTo(cx, cy, x, y float64) { - gc.Current.Path.QuadCurveTo(cx, cy, x, y) -} - -func (gc *StackGraphicContext) RQuadCurveTo(dcx, dcy, dx, dy float64) { - gc.Current.Path.RQuadCurveTo(dcx, dcy, dx, dy) -} - -func (gc *StackGraphicContext) CubicCurveTo(cx1, cy1, cx2, cy2, x, y float64) { - gc.Current.Path.CubicCurveTo(cx1, cy1, cx2, cy2, x, y) -} - -func (gc *StackGraphicContext) RCubicCurveTo(dcx1, dcy1, dcx2, dcy2, dx, dy float64) { - gc.Current.Path.RCubicCurveTo(dcx1, dcy1, dcx2, dcy2, dx, dy) -} - -func (gc *StackGraphicContext) ArcTo(cx, cy, rx, ry, startAngle, angle float64) { - gc.Current.Path.ArcTo(cx, cy, rx, ry, startAngle, angle) -} - -func (gc *StackGraphicContext) RArcTo(dcx, dcy, rx, ry, startAngle, angle float64) { - gc.Current.Path.RArcTo(dcx, dcy, rx, ry, startAngle, angle) -} - -func (gc *StackGraphicContext) Close() { - gc.Current.Path.Close() -} - -func (gc *StackGraphicContext) Save() { - context := new(ContextStack) - context.FontSize = gc.Current.FontSize - context.FontData = gc.Current.FontData - context.LineWidth = gc.Current.LineWidth - context.StrokeColor = gc.Current.StrokeColor - context.FillColor = gc.Current.FillColor - context.FillRule = gc.Current.FillRule - context.Dash = gc.Current.Dash - context.DashOffset = gc.Current.DashOffset - context.Cap = gc.Current.Cap - context.Join = gc.Current.Join - context.Path = gc.Current.Path.Copy() - context.font = gc.Current.font - context.scale = gc.Current.scale - copy(context.Tr[:], gc.Current.Tr[:]) - context.previous = gc.Current - gc.Current = context -} - -func (gc *StackGraphicContext) Restore() { - if gc.Current.previous != nil { - oldContext := gc.Current - gc.Current = gc.Current.previous - oldContext.previous = nil - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/stroker.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/stroker.go deleted file mode 100644 index 9331187f6..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/stroker.go +++ /dev/null @@ -1,135 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 13/12/2010 by Laurent Le Goff - -package draw2d - -type Cap int - -const ( - RoundCap Cap = iota - ButtCap - SquareCap -) - -type Join int - -const ( - BevelJoin Join = iota - RoundJoin - MiterJoin -) - -type LineStroker struct { - Next VertexConverter - HalfLineWidth float64 - Cap Cap - Join Join - vertices []float64 - rewind []float64 - x, y, nx, ny float64 - command VertexCommand -} - -func NewLineStroker(c Cap, j Join, converter VertexConverter) *LineStroker { - l := new(LineStroker) - l.Next = converter - l.HalfLineWidth = 0.5 - l.vertices = make([]float64, 0, 256) - l.rewind = make([]float64, 0, 256) - l.Cap = c - l.Join = j - l.command = VertexNoCommand - return l -} - -func (l *LineStroker) NextCommand(command VertexCommand) { - l.command = command - if command == VertexStopCommand { - l.Next.NextCommand(VertexStartCommand) - for i, j := 0, 1; j < len(l.vertices); i, j = i+2, j+2 { - l.Next.Vertex(l.vertices[i], l.vertices[j]) - l.Next.NextCommand(VertexNoCommand) - } - for i, j := len(l.rewind)-2, len(l.rewind)-1; j > 0; i, j = i-2, j-2 { - l.Next.NextCommand(VertexNoCommand) - l.Next.Vertex(l.rewind[i], l.rewind[j]) - } - if len(l.vertices) > 1 { - l.Next.NextCommand(VertexNoCommand) - l.Next.Vertex(l.vertices[0], l.vertices[1]) - } - l.Next.NextCommand(VertexStopCommand) - // reinit vertices - l.vertices = l.vertices[0:0] - l.rewind = l.rewind[0:0] - l.x, l.y, l.nx, l.ny = 0, 0, 0, 0 - } -} - -func (l *LineStroker) Vertex(x, y float64) { - switch l.command { - case VertexNoCommand: - l.line(l.x, l.y, x, y) - case VertexJoinCommand: - l.joinLine(l.x, l.y, l.nx, l.ny, x, y) - case VertexStartCommand: - l.x, l.y = x, y - case VertexCloseCommand: - l.line(l.x, l.y, x, y) - l.joinLine(l.x, l.y, l.nx, l.ny, x, y) - l.closePolygon() - } - l.command = VertexNoCommand -} - -func (l *LineStroker) appendVertex(vertices ...float64) { - s := len(vertices) / 2 - if len(l.vertices)+s >= cap(l.vertices) { - v := make([]float64, len(l.vertices), cap(l.vertices)+128) - copy(v, l.vertices) - l.vertices = v - v = make([]float64, len(l.rewind), cap(l.rewind)+128) - copy(v, l.rewind) - l.rewind = v - } - - copy(l.vertices[len(l.vertices):len(l.vertices)+s], vertices[:s]) - l.vertices = l.vertices[0 : len(l.vertices)+s] - copy(l.rewind[len(l.rewind):len(l.rewind)+s], vertices[s:]) - l.rewind = l.rewind[0 : len(l.rewind)+s] - -} - -func (l *LineStroker) closePolygon() { - if len(l.vertices) > 1 { - l.appendVertex(l.vertices[0], l.vertices[1], l.rewind[0], l.rewind[1]) - } -} - -func (l *LineStroker) line(x1, y1, x2, y2 float64) { - dx := (x2 - x1) - dy := (y2 - y1) - d := vectorDistance(dx, dy) - if d != 0 { - nx := dy * l.HalfLineWidth / d - ny := -(dx * l.HalfLineWidth / d) - l.appendVertex(x1+nx, y1+ny, x2+nx, y2+ny, x1-nx, y1-ny, x2-nx, y2-ny) - l.x, l.y, l.nx, l.ny = x2, y2, nx, ny - } -} - -func (l *LineStroker) joinLine(x1, y1, nx1, ny1, x2, y2 float64) { - dx := (x2 - x1) - dy := (y2 - y1) - d := vectorDistance(dx, dy) - - if d != 0 { - nx := dy * l.HalfLineWidth / d - ny := -(dx * l.HalfLineWidth / d) - /* l.join(x1, y1, x1 + nx, y1 - ny, nx, ny, x1 + ny2, y1 + nx2, nx2, ny2) - l.join(x1, y1, x1 - ny1, y1 - nx1, nx1, ny1, x1 - ny2, y1 - nx2, nx2, ny2)*/ - - l.appendVertex(x1+nx, y1+ny, x2+nx, y2+ny, x1-nx, y1-ny, x2-nx, y2-ny) - l.x, l.y, l.nx, l.ny = x2, y2, nx, ny - } -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/transform.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/transform.go deleted file mode 100644 index 1d89bfa9b..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/transform.go +++ /dev/null @@ -1,306 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff - -package draw2d - -import ( - "code.google.com/p/freetype-go/freetype/raster" - "math" -) - -type MatrixTransform [6]float64 - -const ( - epsilon = 1e-6 -) - -func (tr MatrixTransform) Determinant() float64 { - return tr[0]*tr[3] - tr[1]*tr[2] -} - -func (tr MatrixTransform) Transform(points ...*float64) { - for i, j := 0, 1; j < len(points); i, j = i+2, j+2 { - x := *points[i] - y := *points[j] - *points[i] = x*tr[0] + y*tr[2] + tr[4] - *points[j] = x*tr[1] + y*tr[3] + tr[5] - } -} - -func (tr MatrixTransform) TransformArray(points []float64) { - for i, j := 0, 1; j < len(points); i, j = i+2, j+2 { - x := points[i] - y := points[j] - points[i] = x*tr[0] + y*tr[2] + tr[4] - points[j] = x*tr[1] + y*tr[3] + tr[5] - } -} - -func (tr MatrixTransform) TransformRectangle(x0, y0, x2, y2 *float64) { - x1 := *x2 - y1 := *y0 - x3 := *x0 - y3 := *y2 - tr.Transform(x0, y0, &x1, &y1, x2, y2, &x3, &y3) - *x0, x1 = minMax(*x0, x1) - *x2, x3 = minMax(*x2, x3) - *y0, y1 = minMax(*y0, y1) - *y2, y3 = minMax(*y2, y3) - - *x0 = min(*x0, *x2) - *y0 = min(*y0, *y2) - *x2 = max(x1, x3) - *y2 = max(y1, y3) -} - -func (tr MatrixTransform) TransformRasterPoint(points ...*raster.Point) { - for _, point := range points { - x := float64(point.X) / 256 - y := float64(point.Y) / 256 - point.X = raster.Fix32((x*tr[0] + y*tr[2] + tr[4]) * 256) - point.Y = raster.Fix32((x*tr[1] + y*tr[3] + tr[5]) * 256) - } -} - -func (tr MatrixTransform) InverseTransform(points ...*float64) { - d := tr.Determinant() // matrix determinant - for i, j := 0, 1; j < len(points); i, j = i+2, j+2 { - x := *points[i] - y := *points[j] - *points[i] = ((x-tr[4])*tr[3] - (y-tr[5])*tr[2]) / d - *points[j] = ((y-tr[5])*tr[0] - (x-tr[4])*tr[1]) / d - } -} - -// ******************** Vector transformations ******************** - -func (tr MatrixTransform) VectorTransform(points ...*float64) { - for i, j := 0, 1; j < len(points); i, j = i+2, j+2 { - x := *points[i] - y := *points[j] - *points[i] = x*tr[0] + y*tr[2] - *points[j] = x*tr[1] + y*tr[3] - } -} - -// ******************** Transformations creation ******************** - -/** Creates an identity transformation. */ -func NewIdentityMatrix() MatrixTransform { - return [6]float64{1, 0, 0, 1, 0, 0} -} - -/** - * Creates a transformation with a translation, that, - * transform point1 into point2. - */ -func NewTranslationMatrix(tx, ty float64) MatrixTransform { - return [6]float64{1, 0, 0, 1, tx, ty} -} - -/** - * Creates a transformation with a sx, sy scale factor - */ -func NewScaleMatrix(sx, sy float64) MatrixTransform { - return [6]float64{sx, 0, 0, sy, 0, 0} -} - -/** - * Creates a rotation transformation. - */ -func NewRotationMatrix(angle float64) MatrixTransform { - c := math.Cos(angle) - s := math.Sin(angle) - return [6]float64{c, s, -s, c, 0, 0} -} - -/** - * Creates a transformation, combining a scale and a translation, that transform rectangle1 into rectangle2. - */ -func NewMatrixTransform(rectangle1, rectangle2 [4]float64) MatrixTransform { - xScale := (rectangle2[2] - rectangle2[0]) / (rectangle1[2] - rectangle1[0]) - yScale := (rectangle2[3] - rectangle2[1]) / (rectangle1[3] - rectangle1[1]) - xOffset := rectangle2[0] - (rectangle1[0] * xScale) - yOffset := rectangle2[1] - (rectangle1[1] * yScale) - return [6]float64{xScale, 0, 0, yScale, xOffset, yOffset} -} - -// ******************** Transformations operations ******************** - -/** - * Returns a transformation that is the inverse of the given transformation. - */ -func (tr MatrixTransform) GetInverseTransformation() MatrixTransform { - d := tr.Determinant() // matrix determinant - return [6]float64{ - tr[3] / d, - -tr[1] / d, - -tr[2] / d, - tr[0] / d, - (tr[2]*tr[5] - tr[3]*tr[4]) / d, - (tr[1]*tr[4] - tr[0]*tr[5]) / d} -} - -func (tr1 MatrixTransform) Multiply(tr2 MatrixTransform) MatrixTransform { - return [6]float64{ - tr1[0]*tr2[0] + tr1[1]*tr2[2], - tr1[1]*tr2[3] + tr1[0]*tr2[1], - tr1[2]*tr2[0] + tr1[3]*tr2[2], - tr1[3]*tr2[3] + tr1[2]*tr2[1], - tr1[4]*tr2[0] + tr1[5]*tr2[2] + tr2[4], - tr1[5]*tr2[3] + tr1[4]*tr2[1] + tr2[5]} -} - -func (tr *MatrixTransform) Scale(sx, sy float64) *MatrixTransform { - tr[0] = sx * tr[0] - tr[1] = sx * tr[1] - tr[2] = sy * tr[2] - tr[3] = sy * tr[3] - return tr -} - -func (tr *MatrixTransform) Translate(tx, ty float64) *MatrixTransform { - tr[4] = tx*tr[0] + ty*tr[2] + tr[4] - tr[5] = ty*tr[3] + tx*tr[1] + tr[5] - return tr -} - -func (tr *MatrixTransform) Rotate(angle float64) *MatrixTransform { - c := math.Cos(angle) - s := math.Sin(angle) - t0 := c*tr[0] + s*tr[2] - t1 := s*tr[3] + c*tr[1] - t2 := c*tr[2] - s*tr[0] - t3 := c*tr[3] - s*tr[1] - tr[0] = t0 - tr[1] = t1 - tr[2] = t2 - tr[3] = t3 - return tr -} - -func (tr MatrixTransform) GetTranslation() (x, y float64) { - return tr[4], tr[5] -} - -func (tr MatrixTransform) GetScaling() (x, y float64) { - return tr[0], tr[3] -} - -func (tr MatrixTransform) GetScale() float64 { - x := 0.707106781*tr[0] + 0.707106781*tr[1] - y := 0.707106781*tr[2] + 0.707106781*tr[3] - return math.Sqrt(x*x + y*y) -} - -func (tr MatrixTransform) GetMaxAbsScaling() (s float64) { - sx := math.Abs(tr[0]) - sy := math.Abs(tr[3]) - if sx > sy { - return sx - } - return sy -} - -func (tr MatrixTransform) GetMinAbsScaling() (s float64) { - sx := math.Abs(tr[0]) - sy := math.Abs(tr[3]) - if sx > sy { - return sy - } - return sx -} - -// ******************** Testing ******************** - -/** - * Tests if a two transformation are equal. A tolerance is applied when - * comparing matrix elements. - */ -func (tr1 MatrixTransform) Equals(tr2 MatrixTransform) bool { - for i := 0; i < 6; i = i + 1 { - if !fequals(tr1[i], tr2[i]) { - return false - } - } - return true -} - -/** - * Tests if a transformation is the identity transformation. A tolerance - * is applied when comparing matrix elements. - */ -func (tr MatrixTransform) IsIdentity() bool { - return fequals(tr[4], 0) && fequals(tr[5], 0) && tr.IsTranslation() -} - -/** - * Tests if a transformation is is a pure translation. A tolerance - * is applied when comparing matrix elements. - */ -func (tr MatrixTransform) IsTranslation() bool { - return fequals(tr[0], 1) && fequals(tr[1], 0) && fequals(tr[2], 0) && fequals(tr[3], 1) -} - -/** - * Compares two floats. - * return true if the distance between the two floats is less than epsilon, false otherwise - */ -func fequals(float1, float2 float64) bool { - return math.Abs(float1-float2) <= epsilon -} - -// this VertexConverter apply the Matrix transformation tr -type VertexMatrixTransform struct { - tr MatrixTransform - Next VertexConverter -} - -func NewVertexMatrixTransform(tr MatrixTransform, converter VertexConverter) *VertexMatrixTransform { - return &VertexMatrixTransform{tr, converter} -} - -// Vertex Matrix Transform -func (vmt *VertexMatrixTransform) NextCommand(command VertexCommand) { - vmt.Next.NextCommand(command) -} - -func (vmt *VertexMatrixTransform) Vertex(x, y float64) { - u := x*vmt.tr[0] + y*vmt.tr[2] + vmt.tr[4] - v := x*vmt.tr[1] + y*vmt.tr[3] + vmt.tr[5] - vmt.Next.Vertex(u, v) -} - -// this adder apply a Matrix transformation to points -type MatrixTransformAdder struct { - tr MatrixTransform - next raster.Adder -} - -func NewMatrixTransformAdder(tr MatrixTransform, adder raster.Adder) *MatrixTransformAdder { - return &MatrixTransformAdder{tr, adder} -} - -// Start starts a new curve at the given point. -func (mta MatrixTransformAdder) Start(a raster.Point) { - mta.tr.TransformRasterPoint(&a) - mta.next.Start(a) -} - -// Add1 adds a linear segment to the current curve. -func (mta MatrixTransformAdder) Add1(b raster.Point) { - mta.tr.TransformRasterPoint(&b) - mta.next.Add1(b) -} - -// Add2 adds a quadratic segment to the current curve. -func (mta MatrixTransformAdder) Add2(b, c raster.Point) { - mta.tr.TransformRasterPoint(&b, &c) - mta.next.Add2(b, c) -} - -// Add3 adds a cubic segment to the current curve. -func (mta MatrixTransformAdder) Add3(b, c, d raster.Point) { - mta.tr.TransformRasterPoint(&b, &c, &d) - mta.next.Add3(b, c, d) -} diff --git a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/vertex2d.go b/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/vertex2d.go deleted file mode 100644 index 4e4d4fd83..000000000 --- a/Godeps/_workspace/src/code.google.com/p/draw2d/draw2d/vertex2d.go +++ /dev/null @@ -1,19 +0,0 @@ -// Copyright 2010 The draw2d Authors. All rights reserved. -// created: 21/11/2010 by Laurent Le Goff - -package draw2d - -type VertexCommand byte - -const ( - VertexNoCommand VertexCommand = iota - VertexStartCommand - VertexJoinCommand - VertexCloseCommand - VertexStopCommand -) - -type VertexConverter interface { - NextCommand(cmd VertexCommand) - Vertex(x, y float64) -} |