diff options
Diffstat (limited to 'vendor/github.com/golang/freetype/truetype/truetype_test.go')
| -rw-r--r-- | vendor/github.com/golang/freetype/truetype/truetype_test.go | 400 |
1 files changed, 400 insertions, 0 deletions
diff --git a/vendor/github.com/golang/freetype/truetype/truetype_test.go b/vendor/github.com/golang/freetype/truetype/truetype_test.go new file mode 100644 index 000000000..bd62d1da1 --- /dev/null +++ b/vendor/github.com/golang/freetype/truetype/truetype_test.go @@ -0,0 +1,400 @@ +// Copyright 2012 The Freetype-Go Authors. All rights reserved. +// Use of this source code is governed by your choice of either the +// FreeType License or the GNU General Public License version 2 (or +// any later version), both of which can be found in the LICENSE file. + +package truetype + +import ( + "bufio" + "fmt" + "io" + "io/ioutil" + "os" + "strconv" + "strings" + "testing" + + "golang.org/x/image/font" + "golang.org/x/image/math/fixed" +) + +func parseTestdataFont(name string) (f *Font, testdataIsOptional bool, err error) { + b, err := ioutil.ReadFile(fmt.Sprintf("../testdata/%s.ttf", name)) + if err != nil { + // The "x-foo" fonts are optional tests, as they are not checked + // in for copyright or file size reasons. + return nil, strings.HasPrefix(name, "x-"), fmt.Errorf("%s: ReadFile: %v", name, err) + } + f, err = Parse(b) + if err != nil { + return nil, true, fmt.Errorf("%s: Parse: %v", name, err) + } + return f, false, nil +} + +func mkBounds(minX, minY, maxX, maxY fixed.Int26_6) fixed.Rectangle26_6 { + return fixed.Rectangle26_6{ + Min: fixed.Point26_6{ + X: minX, + Y: minY, + }, + Max: fixed.Point26_6{ + X: maxX, + Y: maxY, + }, + } +} + +// TestParse tests that the luxisr.ttf metrics and glyphs are parsed correctly. +// The numerical values can be manually verified by examining luxisr.ttx. +func TestParse(t *testing.T) { + f, _, err := parseTestdataFont("luxisr") + if err != nil { + t.Fatal(err) + } + if got, want := f.FUnitsPerEm(), int32(2048); got != want { + t.Errorf("FUnitsPerEm: got %v, want %v", got, want) + } + fupe := fixed.Int26_6(f.FUnitsPerEm()) + if got, want := f.Bounds(fupe), mkBounds(-441, -432, 2024, 2033); got != want { + t.Errorf("Bounds: got %v, want %v", got, want) + } + + i0 := f.Index('A') + i1 := f.Index('V') + if i0 != 36 || i1 != 57 { + t.Fatalf("Index: i0, i1 = %d, %d, want 36, 57", i0, i1) + } + if got, want := f.HMetric(fupe, i0), (HMetric{1366, 19}); got != want { + t.Errorf("HMetric: got %v, want %v", got, want) + } + if got, want := f.VMetric(fupe, i0), (VMetric{2465, 553}); got != want { + t.Errorf("VMetric: got %v, want %v", got, want) + } + if got, want := f.Kern(fupe, i0, i1), fixed.Int26_6(-144); got != want { + t.Errorf("Kern: got %v, want %v", got, want) + } + + g := &GlyphBuf{} + err = g.Load(f, fupe, i0, font.HintingNone) + if err != nil { + t.Fatalf("Load: %v", err) + } + g0 := &GlyphBuf{ + Bounds: g.Bounds, + Points: g.Points, + Ends: g.Ends, + } + g1 := &GlyphBuf{ + Bounds: mkBounds(19, 0, 1342, 1480), + Points: []Point{ + {19, 0, 51}, + {581, 1480, 1}, + {789, 1480, 51}, + {1342, 0, 1}, + {1116, 0, 35}, + {962, 410, 3}, + {368, 410, 33}, + {214, 0, 3}, + {428, 566, 19}, + {904, 566, 33}, + {667, 1200, 3}, + }, + Ends: []int{8, 11}, + } + if got, want := fmt.Sprint(g0), fmt.Sprint(g1); got != want { + t.Errorf("GlyphBuf:\ngot %v\nwant %v", got, want) + } +} + +func TestIndex(t *testing.T) { + testCases := map[string]map[rune]Index{ + "luxisr": { + ' ': 3, + '!': 4, + 'A': 36, + 'V': 57, + 'É': 101, + 'fl': 193, + '\u22c5': 385, + '中': 0, + }, + + // The x-etc test cases use those versions of the .ttf files provided + // by Ubuntu 14.04. See testdata/make-other-hinting-txts.sh for details. + + "x-arial-bold": { + ' ': 3, + '+': 14, + '0': 19, + '_': 66, + 'w': 90, + '~': 97, + 'Ä': 98, + 'fl': 192, + '½': 242, + 'σ': 305, + 'λ': 540, + 'ỹ': 1275, + '\u04e9': 1319, + '中': 0, + }, + "x-deja-vu-sans-oblique": { + ' ': 3, + '*': 13, + 'Œ': 276, + 'ω': 861, + '‡': 2571, + '⊕': 3110, + 'fl': 4728, + '\ufb03': 4729, + '\ufffd': 4813, + // TODO: '\U0001f640': ???, + '中': 0, + }, + "x-droid-sans-japanese": { + ' ': 0, + '\u3000': 3, + '\u3041': 25, + '\u30fe': 201, + '\uff61': 202, + '\uff67': 208, + '\uff9e': 263, + '\uff9f': 264, + '\u4e00': 265, + '\u557e': 1000, + '\u61b6': 2024, + '\u6ede': 3177, + '\u7505': 3555, + '\u81e3': 4602, + '\u81e5': 4603, + '\u81e7': 4604, + '\u81e8': 4605, + '\u81ea': 4606, + '\u81ed': 4607, + '\u81f3': 4608, + '\u81f4': 4609, + '\u91c7': 5796, + '\u9fa0': 6620, + '\u203e': 12584, + }, + "x-times-new-roman": { + ' ': 3, + ':': 29, + 'fl': 192, + 'Ŀ': 273, + '♠': 388, + 'Ŗ': 451, + 'Σ': 520, + '\u200D': 745, + 'Ẽ': 1216, + '\u04e9': 1319, + '中': 0, + }, + } + for name, wants := range testCases { + f, testdataIsOptional, err := parseTestdataFont(name) + if err != nil { + if testdataIsOptional { + t.Log(err) + } else { + t.Fatal(err) + } + continue + } + for r, want := range wants { + if got := f.Index(r); got != want { + t.Errorf("%s: Index of %q, aka %U: got %d, want %d", name, r, r, got, want) + } + } + } +} + +func TestName(t *testing.T) { + testCases := map[string]string{ + "luximr": "Luxi Mono", + "luxirr": "Luxi Serif", + "luxisr": "Luxi Sans", + } + + for name, want := range testCases { + f, testdataIsOptional, err := parseTestdataFont(name) + if err != nil { + if testdataIsOptional { + t.Log(err) + } else { + t.Fatal(err) + } + continue + } + if got := f.Name(NameIDFontFamily); got != want { + t.Errorf("%s: got %q, want %q", name, got, want) + } + } +} + +type scalingTestData struct { + advanceWidth fixed.Int26_6 + bounds fixed.Rectangle26_6 + points []Point +} + +// scalingTestParse parses a line of points like +// 213 -22 -111 236 555;-22 -111 1, 178 555 1, 236 555 1, 36 -111 1 +// The line will not have a trailing "\n". +func scalingTestParse(line string) (ret scalingTestData) { + next := func(s string) (string, fixed.Int26_6) { + t, i := "", strings.Index(s, " ") + if i != -1 { + s, t = s[:i], s[i+1:] + } + x, _ := strconv.Atoi(s) + return t, fixed.Int26_6(x) + } + + i := strings.Index(line, ";") + prefix, line := line[:i], line[i+1:] + + prefix, ret.advanceWidth = next(prefix) + prefix, ret.bounds.Min.X = next(prefix) + prefix, ret.bounds.Min.Y = next(prefix) + prefix, ret.bounds.Max.X = next(prefix) + prefix, ret.bounds.Max.Y = next(prefix) + + ret.points = make([]Point, 0, 1+strings.Count(line, ",")) + for len(line) > 0 { + s := line + if i := strings.Index(line, ","); i != -1 { + s, line = line[:i], line[i+1:] + for len(line) > 0 && line[0] == ' ' { + line = line[1:] + } + } else { + line = "" + } + s, x := next(s) + s, y := next(s) + s, f := next(s) + ret.points = append(ret.points, Point{X: x, Y: y, Flags: uint32(f)}) + } + return ret +} + +// scalingTestEquals is equivalent to, but faster than, calling +// reflect.DeepEquals(a, b), and also returns the index of the first non-equal +// element. It also treats a nil []Point and an empty non-nil []Point as equal. +// a and b must have equal length. +func scalingTestEquals(a, b []Point) (index int, equals bool) { + for i, p := range a { + if p != b[i] { + return i, false + } + } + return 0, true +} + +var scalingTestCases = []struct { + name string + size int +}{ + {"luxisr", 12}, + {"x-arial-bold", 11}, + {"x-deja-vu-sans-oblique", 17}, + {"x-droid-sans-japanese", 9}, + {"x-times-new-roman", 13}, +} + +func testScaling(t *testing.T, h font.Hinting) { + for _, tc := range scalingTestCases { + f, testdataIsOptional, err := parseTestdataFont(tc.name) + if err != nil { + if testdataIsOptional { + t.Log(err) + } else { + t.Error(err) + } + continue + } + hintingStr := "sans" + if h != font.HintingNone { + hintingStr = "with" + } + testFile, err := os.Open(fmt.Sprintf( + "../testdata/%s-%dpt-%s-hinting.txt", tc.name, tc.size, hintingStr)) + if err != nil { + t.Errorf("%s: Open: %v", tc.name, err) + continue + } + defer testFile.Close() + + wants := []scalingTestData{} + scanner := bufio.NewScanner(testFile) + if scanner.Scan() { + major, minor, patch := 0, 0, 0 + _, err := fmt.Sscanf(scanner.Text(), "freetype version %d.%d.%d", &major, &minor, &patch) + if err != nil { + t.Errorf("%s: version information: %v", tc.name, err) + } + if (major < 2) || (major == 2 && minor < 5) || (major == 2 && minor == 5 && patch < 1) { + t.Errorf("%s: need freetype version >= 2.5.1.\n"+ + "Try setting LD_LIBRARY_PATH=/path/to/freetype_built_from_src/objs/.libs/\n"+ + "and re-running testdata/make-other-hinting-txts.sh", + tc.name) + continue + } + } else { + t.Errorf("%s: no version information", tc.name) + continue + } + for scanner.Scan() { + wants = append(wants, scalingTestParse(scanner.Text())) + } + if err := scanner.Err(); err != nil && err != io.EOF { + t.Errorf("%s: Scanner: %v", tc.name, err) + continue + } + + glyphBuf := &GlyphBuf{} + for i, want := range wants { + if err = glyphBuf.Load(f, fixed.I(tc.size), Index(i), h); err != nil { + t.Errorf("%s: glyph #%d: Load: %v", tc.name, i, err) + continue + } + got := scalingTestData{ + advanceWidth: glyphBuf.AdvanceWidth, + bounds: glyphBuf.Bounds, + points: glyphBuf.Points, + } + + if got.advanceWidth != want.advanceWidth { + t.Errorf("%s: glyph #%d advance width:\ngot %v\nwant %v", + tc.name, i, got.advanceWidth, want.advanceWidth) + continue + } + + if got.bounds != want.bounds { + t.Errorf("%s: glyph #%d bounds:\ngot %v\nwant %v", + tc.name, i, got.bounds, want.bounds) + continue + } + + for i := range got.points { + got.points[i].Flags &= 0x01 + } + if len(got.points) != len(want.points) { + t.Errorf("%s: glyph #%d:\ngot %v\nwant %v\ndifferent slice lengths: %d versus %d", + tc.name, i, got.points, want.points, len(got.points), len(want.points)) + continue + } + if j, equals := scalingTestEquals(got.points, want.points); !equals { + t.Errorf("%s: glyph #%d:\ngot %v\nwant %v\nat index %d: %v versus %v", + tc.name, i, got.points, want.points, j, got.points[j], want.points[j]) + continue + } + } + } +} + +func TestScalingHintingNone(t *testing.T) { testScaling(t, font.HintingNone) } +func TestScalingHintingFull(t *testing.T) { testScaling(t, font.HintingFull) } |