PLT-173 Added graphics-go and goexif libraries for image manipulation

1 files changed, 31 insertions, 0 deletions

diff --git a/Godeps/_workspace/src/code.google.com/p/graphics-go/graphics/scale.go b/Godeps/_workspace/src/code.google.com/p/graphics-go/graphics/scale.go
new file mode 100644
index 000000000..7a7fe9696
--- /dev/null
+++ b/Godeps/_workspace/src/code.google.com/p/graphics-go/graphics/scale.go
@@ -0,0 +1,31 @@
+// Copyright 2011 The Graphics-Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package graphics
+
+import (
+	"code.google.com/p/graphics-go/graphics/interp"
+	"errors"
+	"image"
+	"image/draw"
+)
+
+// Scale produces a scaled version of the image using bilinear interpolation.
+func Scale(dst draw.Image, src image.Image) error {
+	if dst == nil {
+		return errors.New("graphics: dst is nil")
+	}
+	if src == nil {
+		return errors.New("graphics: src is nil")
+	}
+
+	b := dst.Bounds()
+	srcb := src.Bounds()
+	if b.Empty() || srcb.Empty() {
+		return nil
+	}
+	sx := float64(b.Dx()) / float64(srcb.Dx())
+	sy := float64(b.Dy()) / float64(srcb.Dy())
+	return I.Scale(sx, sy).Transform(dst, src, interp.Bilinear)
+}