aw/golang-freetype
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Support TTC v2

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Close #11
This commit is contained in:
Yasuhiro Matsumoto 2017-04-07 20:57:48 +09:00
parent d9be45aaf7
commit d8e54afd1a
1 changed files with 4 additions and 4 deletions
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8
truetype/truetype.go
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@ -550,8 +550,7 @@ func parse(ttf []byte, offset int) (font *Font, err error) {
return
}
ttcVersion, offset := u32(ttf, offset), offset+4
if ttcVersion != 0x00010000 {
// TODO: support TTC version 2.0, once I have such a .ttc file to test with.
if ttcVersion != 0x00010000 && ttcVersion != 0x00020000 {
err = FormatError("bad TTC version")
return
}
@ -578,14 +577,15 @@ func parse(ttf []byte, offset int) (font *Font, err error) {
return
}
n, offset := int(u16(ttf, offset)), offset+2
if len(ttf) < 16*n+12 {
offset += 6 // Skip the searchRange, entrySelector and rangeShift.
if len(ttf) < 16*n+offset {
err = FormatError("TTF data is too short")
return
}
f := new(Font)
// Assign the table slices.
for i := 0; i < n; i++ {
x := 16*i + 12
x := 16*i + offset
switch string(ttf[x : x+4]) {
case "cmap":
f.cmap, err = readTable(ttf, ttf[x+8:x+16])