freetype: add script to create more hinting tests.
R=bsiegert, r CC=golang-dev https://codereview.appspot.com/14414044
This commit is contained in:
Nigel Tao
parent
b968fb0953
commit
b76427be47
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@ -1,27 +1,47 @@
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/*
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gcc main.c -I/usr/include/freetype2 -lfreetype && ./a.out
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gcc main.c -I/usr/include/freetype2 -lfreetype && ./a.out 12 ../../testdata/luxisr.ttf with_hinting
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*/
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#include <stdio.h>
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#include <ft2build.h>
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#include FT_FREETYPE_H
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static int font_size = 12;
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static int no_hinting = 0;
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void usage(char** argv) {
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printf("usage: %s font_size font_file [with_hinting|sans_hinting]\n", argv[0]);
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}
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int main(int argc, char** argv) {
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FT_Error error;
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FT_Library library;
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FT_Face face;
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FT_Outline* o;
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int i, j;
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int i, j, font_size, no_hinting;
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if (argc != 4) {
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usage(argv);
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return 1;
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}
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font_size = atoi(argv[1]);
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if (font_size <= 0) {
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printf("invalid font_size\n");
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usage(argv);
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return 1;
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}
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if (!strcmp(argv[3], "with_hinting")) {
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no_hinting = 0;
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} else if (!strcmp(argv[3], "sans_hinting")) {
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no_hinting = 1;
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} else {
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printf("neither \"with_hinting\" nor \"sans_hinting\"\n");
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usage(argv);
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return 1;
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};
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error = FT_Init_FreeType(&library);
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if (error) {
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printf("FT_Init_FreeType: error #%d\n", error);
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return 1;
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}
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error = FT_New_Face(library, "../../testdata/luxisr.ttf", 0, &face);
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error = FT_New_Face(library, argv[2], 0, &face);
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if (error) {
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printf("FT_New_Face: error #%d\n", error);
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return 1;
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@ -50,4 +70,5 @@ int main(int argc, char** argv) {
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}
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printf("\n");
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}
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return 0;
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}
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@ -74,63 +74,106 @@ func TestParse(t *testing.T) {
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}
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}
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func testScaling(t *testing.T, filename string, hinter *Hinter) {
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b, err := ioutil.ReadFile("../../testdata/luxisr.ttf")
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if err != nil {
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t.Fatalf("ReadFile: %v", err)
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}
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font, err := Parse(b)
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if err != nil {
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t.Fatalf("Parse: %v", err)
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}
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f, err := os.Open("../../testdata/" + filename)
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if err != nil {
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t.Fatalf("Open: %v", err)
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}
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defer f.Close()
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var scalingTestCases = []struct {
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name string
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size int32
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// hintingBrokenAt, if non-negative, is the glyph index n for which
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// only the first n glyphs are known to be correctly hinted.
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// TODO: remove this field, when hinting is completely implemented.
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hintingBrokenAt int
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}{
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{"luxisr", 12, -1},
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// TODO: uncomment the fonts below, once they get past Parse and
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// GlyphBuf.Load, and the unhinted values match C Freetype.
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//{"x-arial-bold", 11, 0},
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//{"x-deja-vu-sans-oblique", 17, 0},
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//{"x-droid-sans-japanese", 9, 0},
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//{"x-inconsolata", 10, 0},
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//{"x-times-new-roman", 13, 0},
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}
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wants := [][]Point{}
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scanner := bufio.NewScanner(f)
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for scanner.Scan() {
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text := scanner.Text()
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if text == "" {
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wants = append(wants, []Point{})
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continue
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}
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ss := strings.Split(text, ",")
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points := make([]Point, len(ss))
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for i, s := range ss {
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p := &points[i]
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if _, err := fmt.Sscanf(s, "%d %d %d", &p.X, &p.Y, &p.Flags); err != nil {
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t.Fatalf("Sscanf: %v", err)
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func testScaling(t *testing.T, hinter *Hinter) {
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loop:
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for _, tc := range scalingTestCases {
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b, err := ioutil.ReadFile(fmt.Sprintf("../../testdata/%s.ttf", tc.name))
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if err != nil {
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// The "x-foo" fonts are optional tests, as they are not checked
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// in for copyright or file size reasons.
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if strings.HasPrefix(tc.name, "x-") {
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t.Logf("%s: ReadFile: %v", tc.name, err)
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} else {
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t.Errorf("%s: ReadFile: %v", tc.name, err)
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}
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continue loop
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}
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wants = append(wants, points)
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}
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if err := scanner.Err(); err != nil && err != io.EOF {
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t.Fatalf("Scanner: %v", err)
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}
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font, err := Parse(b)
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if err != nil {
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t.Errorf("%s: Parse: %v", tc.name, err)
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continue loop
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}
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hinting := "sans"
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if hinter != nil {
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hinting = "with"
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}
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f, err := os.Open(fmt.Sprintf(
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"../../testdata/%s-%dpt-%s-hinting.txt", tc.name, tc.size, hinting))
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if err != nil {
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t.Errorf("%s: Open: %v", tc.name, err)
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continue loop
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}
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defer f.Close()
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const fontSize = 12
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glyphBuf := NewGlyphBuf()
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for i, want := range wants {
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if err = glyphBuf.Load(font, fontSize*64, Index(i), hinter); err != nil {
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t.Fatalf("Load: %v", err)
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wants := [][]Point{}
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scanner := bufio.NewScanner(f)
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for scanner.Scan() {
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text := scanner.Text()
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if text == "" {
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wants = append(wants, []Point{})
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continue
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}
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ss := strings.Split(text, ",")
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points := make([]Point, len(ss))
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for i, s := range ss {
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p := &points[i]
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if _, err := fmt.Sscanf(s, "%d %d %d", &p.X, &p.Y, &p.Flags); err != nil {
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t.Errorf("%s: Sscanf: %v", tc.name, err)
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continue loop
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}
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}
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wants = append(wants, points)
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}
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got := glyphBuf.Point
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for i := range got {
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got[i].Flags &= 0x01
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if err := scanner.Err(); err != nil && err != io.EOF {
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t.Errorf("%s: Scanner: %v", tc.name, err)
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continue loop
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}
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if !reflect.DeepEqual(got, want) {
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t.Errorf("glyph #%d:\ngot %v\nwant %v\n", i, got, want)
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glyphBuf := NewGlyphBuf()
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for i, want := range wants {
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// TODO: completely implement hinting. For now, only the first
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// tc.hintingBrokenAt glyphs of the test case's font are correctly hinted.
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if hinter != nil && i == tc.hintingBrokenAt {
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break
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}
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if err = glyphBuf.Load(font, tc.size*64, Index(i), hinter); err != nil {
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t.Errorf("%s: glyph #%d: Load: %v", tc.name, i, err)
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continue loop
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}
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got := glyphBuf.Point
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for i := range got {
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got[i].Flags &= 0x01
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}
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if !reflect.DeepEqual(got, want) {
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t.Errorf("%s: glyph #%d:\ngot %v\nwant %v\n", tc.name, i, got, want)
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}
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}
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}
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}
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func TestScalingSansHinting(t *testing.T) {
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testScaling(t, "luxisr-12pt-sans-hinting.txt", nil)
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testScaling(t, nil)
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}
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func TestScalingWithHinting(t *testing.T) {
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testScaling(t, "luxisr-12pt-with-hinting.txt", &Hinter{})
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testScaling(t, &Hinter{})
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}
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@ -1,8 +1,8 @@
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The *.ttf and COPYING files in this directory were copied from the X.org
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The luxi*.ttf and COPYING files in this directory were copied from the X.org
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project, specifically
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http://xorg.freedesktop.org/releases/individual/font/font-bh-ttf-1.0.0.tar.bz2
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There are three fonts: sans (s), serif (r) and monospaced (m). For example,
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There are three Luxi fonts: sans (s), serif (r) and monospaced (m). For example,
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luxisr.ttf is Luxi Sans. The 'r' here means regular, as opposed to bold.
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The *.ttx files in this directory were generated from the *.ttf files
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@ -0,0 +1,30 @@
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#!/usr/bin/env bash
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#
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# This script creates the optional x-*-hinting.txt files from fonts that are
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# not checked in for copyright or file size reasons.
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#
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# Run it from this directory (testdata).
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#
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# It has only been tested on an Ubuntu 12.04 system.
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set -e
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: ${FONTDIR:=/usr/share/fonts/truetype}
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ln -sf $FONTDIR/droid/DroidSansJapanese.ttf x-droid-sans-japanese.ttf
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ln -sf $FONTDIR/msttcorefonts/Arial_Bold.ttf x-arial-bold.ttf
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ln -sf $FONTDIR/msttcorefonts/Times_New_Roman.ttf x-times-new-roman.ttf
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ln -sf $FONTDIR/ttf-dejavu/DejaVuSans-Oblique.ttf x-deja-vu-sans-oblique.ttf
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${CC:=gcc} ../cmd/print-glyph-points/main.c $(pkg-config --cflags --libs freetype2) -o print-glyph-points
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./print-glyph-points 9 x-droid-sans-japanese.ttf sans_hinting > x-droid-sans-japanese-9pt-sans-hinting.txt
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./print-glyph-points 9 x-droid-sans-japanese.ttf with_hinting > x-droid-sans-japanese-9pt-with-hinting.txt
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./print-glyph-points 11 x-arial-bold.ttf sans_hinting > x-arial-bold-11pt-sans-hinting.txt
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./print-glyph-points 11 x-arial-bold.ttf with_hinting > x-arial-bold-11pt-with-hinting.txt
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./print-glyph-points 13 x-times-new-roman.ttf sans_hinting > x-times-new-roman-13pt-sans-hinting.txt
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./print-glyph-points 13 x-times-new-roman.ttf with_hinting > x-times-new-roman-13pt-with-hinting.txt
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./print-glyph-points 17 x-deja-vu-sans-oblique.ttf sans_hinting > x-deja-vu-sans-oblique-17pt-sans-hinting.txt
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./print-glyph-points 17 x-deja-vu-sans-oblique.ttf with_hinting > x-deja-vu-sans-oblique-17pt-with-hinting.txt
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rm print-glyph-points
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