PRBool
gfxGDIFont::InitTextRun(gfxContext *aContext,
gfxTextRun *aTextRun,
const PRUnichar *aString,
PRUint32 aRunStart,
PRUint32 aRunLength,
PRInt32 aRunScript)
{
if (!mMetrics) {
Initialize();
}
if (!mIsValid) {
NS_WARNING("invalid font! expect incorrect text rendering");
return PR_FALSE;
}
PRBool ok = PR_FALSE;
if (mHarfBuzzShaper) {
if (gfxPlatform::GetPlatform()->UseHarfBuzzLevel() >=
gfxUnicodeProperties::ScriptShapingLevel(aRunScript)) {
ok = mHarfBuzzShaper->InitTextRun(aContext, aTextRun, aString,
aRunStart, aRunLength,
aRunScript);
}
}
if (!ok) {
GDIFontEntry *fe = static_cast<GDIFontEntry*>(GetFontEntry());
PRBool useUniscribeOnly = !fe->IsTrueType() || fe->IsSymbolFont();
if (useUniscribeOnly ||
(UseUniscribe(aTextRun, aString, aRunStart, aRunLength)
&& !fe->mForceGDI))
{
// first try Uniscribe
if (!mUniscribeShaper) {
mUniscribeShaper = new gfxUniscribeShaper(this);
}
ok = mUniscribeShaper->InitTextRun(aContext, aTextRun, aString,
aRunStart, aRunLength,
aRunScript);
if (ok) {
return PR_TRUE;
}
// fallback to GDI shaping
if (!useUniscribeOnly) {
if (!mPlatformShaper) {
CreatePlatformShaper();
}
ok = mPlatformShaper->InitTextRun(aContext, aTextRun, aString,
aRunStart, aRunLength,
aRunScript);
}
} else {
// first use GDI
if (!mPlatformShaper) {
CreatePlatformShaper();
}
ok = mPlatformShaper->InitTextRun(aContext, aTextRun, aString,
aRunStart, aRunLength,
aRunScript);
if (ok) {
return PR_TRUE;
}
// first try Uniscribe
if (!mUniscribeShaper) {
mUniscribeShaper = new gfxUniscribeShaper(this);
}
// use Uniscribe shaping
ok = mUniscribeShaper->InitTextRun(aContext, aTextRun, aString,
aRunStart, aRunLength,
aRunScript);
}
#if DEBUG
if (!ok) {
NS_ConvertUTF16toUTF8 name(GetName());
char msg[256];
sprintf(msg,
"text shaping with both uniscribe and GDI failed for"
" font: %s",
name.get());
NS_WARNING(msg);
}
#endif
}
return ok;
}
bool
gfxGDIFont::ShapeWord(gfxContext *aContext,
gfxShapedWord *aShapedWord,
const PRUnichar *aString,
bool aPreferPlatformShaping)
{
if (!mMetrics) {
Initialize();
}
if (!mIsValid) {
NS_WARNING("invalid font! expect incorrect text rendering");
return false;
}
bool ok = false;
// Ensure the cairo font is set up, so there's no risk it'll fall back to
// creating a "toy" font internally (see bug 544617).
// We must check that this succeeded, otherwise we risk cairo creating the
// wrong kind of font internally as a fallback (bug 744480).
if (!SetupCairoFont(aContext)) {
return false;
}
#ifdef MOZ_GRAPHITE
if (mGraphiteShaper && gfxPlatform::GetPlatform()->UseGraphiteShaping()) {
ok = mGraphiteShaper->ShapeWord(aContext, aShapedWord, aString);
}
#endif
if (!ok && mHarfBuzzShaper) {
if (gfxPlatform::GetPlatform()->UseHarfBuzzForScript(aShapedWord->Script())) {
ok = mHarfBuzzShaper->ShapeWord(aContext, aShapedWord, aString);
}
}
if (!ok) {
GDIFontEntry *fe = static_cast<GDIFontEntry*>(GetFontEntry());
bool preferUniscribe =
(!fe->IsTrueType() || fe->IsSymbolFont()) && !fe->mForceGDI;
if (preferUniscribe || UseUniscribe(aShapedWord, aString)) {
// first try Uniscribe
if (!mUniscribeShaper) {
mUniscribeShaper = new gfxUniscribeShaper(this);
}
ok = mUniscribeShaper->ShapeWord(aContext, aShapedWord, aString);
if (ok) {
return true;
}
// fallback to GDI shaping
if (!mPlatformShaper) {
CreatePlatformShaper();
}
ok = mPlatformShaper->ShapeWord(aContext, aShapedWord, aString);
} else {
// first use GDI
if (!mPlatformShaper) {
CreatePlatformShaper();
}
ok = mPlatformShaper->ShapeWord(aContext, aShapedWord, aString);
if (ok) {
return true;
}
// try Uniscribe if GDI failed
if (!mUniscribeShaper) {
mUniscribeShaper = new gfxUniscribeShaper(this);
}
// use Uniscribe shaping
ok = mUniscribeShaper->ShapeWord(aContext, aShapedWord, aString);
}
#if DEBUG
if (!ok) {
NS_ConvertUTF16toUTF8 name(GetName());
char msg[256];
sprintf(msg,
"text shaping with both uniscribe and GDI failed for"
" font: %s",
name.get());
NS_WARNING(msg);
}
#endif
}
if (ok && IsSyntheticBold()) {
float synBoldOffset =
GetSyntheticBoldOffset() * CalcXScale(aContext);
aShapedWord->AdjustAdvancesForSyntheticBold(synBoldOffset);
}
return ok;
}
bool
gfxGDIFont::InitTextRun(gfxContext *aContext,
gfxTextRun *aTextRun,
const PRUnichar *aString,
PRUint32 aRunStart,
PRUint32 aRunLength,
PRInt32 aRunScript,
bool aPreferPlatformShaping)
{
if (!mMetrics) {
Initialize();
}
if (!mIsValid) {
NS_WARNING("invalid font! expect incorrect text rendering");
return false;
}
bool ok = false;
// ensure the cairo font is set up, so there's no risk it'll fall back to
// creating a "toy" font internally (see bug 544617)
SetupCairoFont(aContext);
if (mHarfBuzzShaper) {
if (gfxPlatform::GetPlatform()->UseHarfBuzzForScript(aRunScript)) {
ok = mHarfBuzzShaper->InitTextRun(aContext, aTextRun, aString,
aRunStart, aRunLength,
aRunScript);
}
}
if (!ok) {
GDIFontEntry *fe = static_cast<GDIFontEntry*>(GetFontEntry());
bool preferUniscribe =
(!fe->IsTrueType() || fe->IsSymbolFont()) && !fe->mForceGDI;
if (preferUniscribe ||
UseUniscribe(aTextRun, aString, aRunStart, aRunLength))
{
// first try Uniscribe
if (!mUniscribeShaper) {
mUniscribeShaper = new gfxUniscribeShaper(this);
}
ok = mUniscribeShaper->InitTextRun(aContext, aTextRun, aString,
aRunStart, aRunLength,
aRunScript);
if (ok) {
return true;
}
// fallback to GDI shaping
if (!mPlatformShaper) {
CreatePlatformShaper();
}
ok = mPlatformShaper->InitTextRun(aContext, aTextRun, aString,
aRunStart, aRunLength,
aRunScript);
} else {
// first use GDI
if (!mPlatformShaper) {
CreatePlatformShaper();
}
ok = mPlatformShaper->InitTextRun(aContext, aTextRun, aString,
aRunStart, aRunLength,
aRunScript);
if (ok) {
return true;
}
// try Uniscribe if GDI failed
if (!mUniscribeShaper) {
mUniscribeShaper = new gfxUniscribeShaper(this);
}
// use Uniscribe shaping
ok = mUniscribeShaper->InitTextRun(aContext, aTextRun, aString,
aRunStart, aRunLength,
aRunScript);
}
#if DEBUG
if (!ok) {
NS_ConvertUTF16toUTF8 name(GetName());
char msg[256];
sprintf(msg,
"text shaping with both uniscribe and GDI failed for"
" font: %s",
name.get());
NS_WARNING(msg);
}
#endif
}
return ok;
}
