GDIFontEntry*
GDIFontEntry::CreateFontEntry(const nsAString& aName, gfxWindowsFontType aFontType,
PRBool aItalic, PRUint16 aWeight,
gfxUserFontData* aUserFontData)
{
// jtdfix - need to set charset, unicode ranges, pitch/family
GDIFontEntry *fe = new GDIFontEntry(aName, aFontType, aItalic, aWeight,
aUserFontData);
// ReadCMAP may change the values of mUnicodeFont and mSymbolFont
if (NS_FAILED(fe->ReadCMAP())) {
// Type1 fonts aren't necessarily Unicode but
// this is the best guess we can make here
if (fe->IsType1())
fe->mUnicodeFont = PR_TRUE;
else
fe->mUnicodeFont = PR_FALSE;
// For fonts where we failed to read the character map,
// we can take a slow path to look up glyphs character by character
fe->mUnknownCMAP = PR_TRUE;
}
return fe;
}
void
gfxGDIFont::FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize,
bool aUseGDIFakeItalic)
{
GDIFontEntry *fe = static_cast<GDIFontEntry*>(GetFontEntry());
uint16_t weight;
if (fe->IsUserFont()) {
if (fe->IsLocalUserFont()) {
// for local user fonts, don't change the original weight
// in the entry's logfont, because that could alter the
// choice of actual face used (bug 724231)
weight = 0;
} else {
// avoid GDI synthetic bold which occurs when weight
// specified is >= font data weight + 200
weight = mNeedsBold ? 700 : 200;
}
} else {
weight = mNeedsBold ? 700 : fe->Weight();
}
fe->FillLogFont(&aLogFont, weight, aSize,
(mAntialiasOption == kAntialiasSubpixel) ? true : false);
// If GDI synthetic italic is wanted, force the lfItalic field to true
if (aUseGDIFakeItalic) {
aLogFont.lfItalic = 1;
}
}
void
gfxGDIFont::FillLogFont(LOGFONTW& aLogFont, gfxFloat aSize)
{
GDIFontEntry *fe = static_cast<GDIFontEntry*>(GetFontEntry());
PRUint16 weight = mNeedsBold ? 700 : fe->Weight();
PRBool italic = (mStyle.style & (FONT_STYLE_ITALIC | FONT_STYLE_OBLIQUE));
// if user font, disable italics/bold if defined to be italics/bold face
// this avoids unwanted synthetic italics/bold
if (fe->mIsUserFont) {
if (fe->IsItalic())
italic = PR_FALSE; // avoid synthetic italic
if (fe->IsBold() || !mNeedsBold) {
// avoid GDI synthetic bold which occurs when weight
// specified is >= font data weight + 200
weight = 200;
}
}
fe->FillLogFont(&aLogFont, italic, weight, aSize,
(mAntialiasOption == kAntialiasSubpixel) ? PR_TRUE : PR_FALSE);
}
int CALLBACK
GDIFontFamily::FamilyAddStylesProc(const ENUMLOGFONTEXW *lpelfe,
const NEWTEXTMETRICEXW *nmetrics,
DWORD fontType, LPARAM data)
{
const NEWTEXTMETRICW& metrics = nmetrics->ntmTm;
LOGFONTW logFont = lpelfe->elfLogFont;
GDIFontFamily *ff = reinterpret_cast<GDIFontFamily*>(data);
// Some fonts claim to support things > 900, but we don't so clamp the sizes
logFont.lfWeight = clamped(logFont.lfWeight, LONG(100), LONG(900));
gfxWindowsFontType feType = GDIFontEntry::DetermineFontType(metrics, fontType);
GDIFontEntry *fe = nullptr;
for (uint32_t i = 0; i < ff->mAvailableFonts.Length(); ++i) {
fe = static_cast<GDIFontEntry*>(ff->mAvailableFonts[i].get());
if (feType > fe->mFontType) {
// if the new type is better than the old one, remove the old entries
ff->mAvailableFonts.RemoveElementAt(i);
--i;
} else if (feType < fe->mFontType) {
// otherwise if the new type is worse, skip it
return 1;
}
}
for (uint32_t i = 0; i < ff->mAvailableFonts.Length(); ++i) {
fe = static_cast<GDIFontEntry*>(ff->mAvailableFonts[i].get());
// check if we already know about this face
if (fe->mWeight == logFont.lfWeight &&
fe->mItalic == (logFont.lfItalic == 0xFF)) {
// update the charset bit here since this could be different
fe->mCharset.set(metrics.tmCharSet);
return 1;
}
}
// We can't set the hasItalicFace flag correctly here,
// because we might not have seen the family's italic face(s) yet.
// So we'll set that flag for all members after loading all the faces.
fe = GDIFontEntry::CreateFontEntry(nsDependentString(lpelfe->elfFullName),
feType, (logFont.lfItalic == 0xFF),
(uint16_t) (logFont.lfWeight), 0,
nullptr, false);
if (!fe)
return 1;
ff->AddFontEntry(fe);
// mark the charset bit
fe->mCharset.set(metrics.tmCharSet);
fe->mWindowsFamily = logFont.lfPitchAndFamily & 0xF0;
fe->mWindowsPitch = logFont.lfPitchAndFamily & 0x0F;
if (nmetrics->ntmFontSig.fsUsb[0] != 0x00000000 &&
nmetrics->ntmFontSig.fsUsb[1] != 0x00000000 &&
nmetrics->ntmFontSig.fsUsb[2] != 0x00000000 &&
nmetrics->ntmFontSig.fsUsb[3] != 0x00000000) {
// set the unicode ranges
uint32_t x = 0;
for (uint32_t i = 0; i < 4; ++i) {
DWORD range = nmetrics->ntmFontSig.fsUsb[i];
for (uint32_t k = 0; k < 32; ++k) {
fe->mUnicodeRanges.set(x++, (range & (1 << k)) != 0);
}
}
}
#ifdef PR_LOGGING
if (LOG_FONTLIST_ENABLED()) {
LOG_FONTLIST(("(fontlist) added (%s) to family (%s)"
" with style: %s weight: %d stretch: %d",
NS_ConvertUTF16toUTF8(fe->Name()).get(),
NS_ConvertUTF16toUTF8(ff->Name()).get(),
(logFont.lfItalic == 0xff) ? "italic" : "normal",
logFont.lfWeight, fe->Stretch()));
}
#endif
return 1;
}
void
gfxGDIFont::Initialize()
{
NS_ASSERTION(!mMetrics, "re-creating metrics? this will leak");
LOGFONTW logFont;
// Figure out if we want to do synthetic oblique styling.
GDIFontEntry* fe = static_cast<GDIFontEntry*>(GetFontEntry());
bool wantFakeItalic =
(mStyle.style & (NS_FONT_STYLE_ITALIC | NS_FONT_STYLE_OBLIQUE)) &&
!fe->IsItalic();
// If the font's family has an actual italic face (but font matching
// didn't choose it), we have to use a cairo transform instead of asking
// GDI to italicize, because that would use a different face and result
// in a possible glyph ID mismatch between shaping and rendering.
//
// We use the mFamilyHasItalicFace flag in the entry in case of user fonts,
// where the *CSS* family may not know about italic faces that are present
// in the *GDI* family, and which GDI would use if we asked it to perform
// the "italicization".
bool useCairoFakeItalic = wantFakeItalic && fe->mFamilyHasItalicFace;
if (mAdjustedSize == 0.0) {
mAdjustedSize = mStyle.size;
if (mStyle.sizeAdjust != 0.0 && mAdjustedSize > 0.0) {
// to implement font-size-adjust, we first create the "unadjusted" font
FillLogFont(logFont, mAdjustedSize,
wantFakeItalic && !useCairoFakeItalic);
mFont = ::CreateFontIndirectW(&logFont);
// initialize its metrics so we can calculate size adjustment
Initialize();
// calculate the properly adjusted size, and then proceed
// to recreate mFont and recalculate metrics
gfxFloat aspect = mMetrics->xHeight / mMetrics->emHeight;
mAdjustedSize = mStyle.GetAdjustedSize(aspect);
// delete the temporary font and metrics
::DeleteObject(mFont);
mFont = nullptr;
delete mMetrics;
mMetrics = nullptr;
}
}
// (bug 724231) for local user fonts, we don't use GDI's synthetic bold,
// as it could lead to a different, incompatible face being used
// but instead do our own multi-striking
if (mNeedsBold && GetFontEntry()->IsLocalUserFont()) {
mApplySyntheticBold = true;
}
// this may end up being zero
mAdjustedSize = ROUND(mAdjustedSize);
FillLogFont(logFont, mAdjustedSize, wantFakeItalic && !useCairoFakeItalic);
mFont = ::CreateFontIndirectW(&logFont);
mMetrics = new gfxFont::Metrics;
::memset(mMetrics, 0, sizeof(*mMetrics));
AutoDC dc;
SetGraphicsMode(dc.GetDC(), GM_ADVANCED);
AutoSelectFont selectFont(dc.GetDC(), mFont);
// Get font metrics if size > 0
if (mAdjustedSize > 0.0) {
OUTLINETEXTMETRIC oMetrics;
TEXTMETRIC& metrics = oMetrics.otmTextMetrics;
if (0 < GetOutlineTextMetrics(dc.GetDC(), sizeof(oMetrics), &oMetrics)) {
mMetrics->superscriptOffset = (double)oMetrics.otmptSuperscriptOffset.y;
// Some fonts have wrong sign on their subscript offset, bug 410917.
mMetrics->subscriptOffset = fabs((double)oMetrics.otmptSubscriptOffset.y);
mMetrics->strikeoutSize = (double)oMetrics.otmsStrikeoutSize;
mMetrics->strikeoutOffset = (double)oMetrics.otmsStrikeoutPosition;
mMetrics->underlineSize = (double)oMetrics.otmsUnderscoreSize;
mMetrics->underlineOffset = (double)oMetrics.otmsUnderscorePosition;
const MAT2 kIdentityMatrix = { {0, 1}, {0, 0}, {0, 0}, {0, 1} };
GLYPHMETRICS gm;
DWORD len = GetGlyphOutlineW(dc.GetDC(), PRUnichar('x'), GGO_METRICS, &gm, 0, nullptr, &kIdentityMatrix);
if (len == GDI_ERROR || gm.gmptGlyphOrigin.y <= 0) {
// 56% of ascent, best guess for true type
mMetrics->xHeight =
ROUND((double)metrics.tmAscent * DEFAULT_XHEIGHT_FACTOR);
} else {
mMetrics->xHeight = gm.gmptGlyphOrigin.y;
}
mMetrics->emHeight = metrics.tmHeight - metrics.tmInternalLeading;
gfxFloat typEmHeight = (double)oMetrics.otmAscent - (double)oMetrics.otmDescent;
mMetrics->emAscent = ROUND(mMetrics->emHeight * (double)oMetrics.otmAscent / typEmHeight);
mMetrics->emDescent = mMetrics->emHeight - mMetrics->emAscent;
if (oMetrics.otmEMSquare > 0) {
mFUnitsConvFactor = float(mAdjustedSize / oMetrics.otmEMSquare);
}
} else {
// Make a best-effort guess at extended metrics
// this is based on general typographic guidelines
// GetTextMetrics can fail if the font file has been removed
// or corrupted recently.
BOOL result = GetTextMetrics(dc.GetDC(), &metrics);
if (!result) {
NS_WARNING("Missing or corrupt font data, fasten your seatbelt");
mIsValid = false;
memset(mMetrics, 0, sizeof(*mMetrics));
return;
}
mMetrics->xHeight =
ROUND((float)metrics.tmAscent * DEFAULT_XHEIGHT_FACTOR);
mMetrics->superscriptOffset = mMetrics->xHeight;
mMetrics->subscriptOffset = mMetrics->xHeight;
mMetrics->strikeoutSize = 1;
mMetrics->strikeoutOffset = ROUND(mMetrics->xHeight * 0.5f); // 50% of xHeight
mMetrics->underlineSize = 1;
mMetrics->underlineOffset = -ROUND((float)metrics.tmDescent * 0.30f); // 30% of descent
mMetrics->emHeight = metrics.tmHeight - metrics.tmInternalLeading;
mMetrics->emAscent = metrics.tmAscent - metrics.tmInternalLeading;
mMetrics->emDescent = metrics.tmDescent;
}
mMetrics->internalLeading = metrics.tmInternalLeading;
mMetrics->externalLeading = metrics.tmExternalLeading;
mMetrics->maxHeight = metrics.tmHeight;
mMetrics->maxAscent = metrics.tmAscent;
mMetrics->maxDescent = metrics.tmDescent;
mMetrics->maxAdvance = metrics.tmMaxCharWidth;
mMetrics->aveCharWidth = NS_MAX<gfxFloat>(1, metrics.tmAveCharWidth);
// The font is monospace when TMPF_FIXED_PITCH is *not* set!
// See http://msdn2.microsoft.com/en-us/library/ms534202(VS.85).aspx
if (!(metrics.tmPitchAndFamily & TMPF_FIXED_PITCH)) {
mMetrics->maxAdvance = mMetrics->aveCharWidth;
}
// Cache the width of a single space.
SIZE size;
GetTextExtentPoint32W(dc.GetDC(), L" ", 1, &size);
mMetrics->spaceWidth = ROUND(size.cx);
// Cache the width of digit zero.
// XXX MSDN (http://msdn.microsoft.com/en-us/library/ms534223.aspx)
// does not say what the failure modes for GetTextExtentPoint32 are -
// is it safe to assume it will fail iff the font has no '0'?
if (GetTextExtentPoint32W(dc.GetDC(), L"0", 1, &size)) {
mMetrics->zeroOrAveCharWidth = ROUND(size.cx);
} else {
mMetrics->zeroOrAveCharWidth = mMetrics->aveCharWidth;
}
mSpaceGlyph = 0;
if (metrics.tmPitchAndFamily & TMPF_TRUETYPE) {
WORD glyph;
DWORD ret = GetGlyphIndicesW(dc.GetDC(), L" ", 1, &glyph,
GGI_MARK_NONEXISTING_GLYPHS);
if (ret != GDI_ERROR && glyph != 0xFFFF) {
mSpaceGlyph = glyph;
}
}
SanitizeMetrics(mMetrics, GetFontEntry()->mIsBadUnderlineFont);
}
if (IsSyntheticBold()) {
mMetrics->aveCharWidth += GetSyntheticBoldOffset();
mMetrics->maxAdvance += GetSyntheticBoldOffset();
}
mFontFace = cairo_win32_font_face_create_for_logfontw_hfont(&logFont,
mFont);
cairo_matrix_t sizeMatrix, ctm;
cairo_matrix_init_identity(&ctm);
cairo_matrix_init_scale(&sizeMatrix, mAdjustedSize, mAdjustedSize);
if (useCairoFakeItalic) {
// Skew the matrix to do fake italic if it wasn't already applied
// via the LOGFONT
double skewfactor = OBLIQUE_SKEW_FACTOR;
cairo_matrix_t style;
cairo_matrix_init(&style,
1, //xx
0, //yx
-1 * skewfactor, //xy
1, //yy
0, //x0
0); //y0
cairo_matrix_multiply(&sizeMatrix, &sizeMatrix, &style);
}
cairo_font_options_t *fontOptions = cairo_font_options_create();
if (mAntialiasOption != kAntialiasDefault) {
cairo_font_options_set_antialias(fontOptions,
GetCairoAntialiasOption(mAntialiasOption));
}
mScaledFont = cairo_scaled_font_create(mFontFace, &sizeMatrix,
&ctm, fontOptions);
cairo_font_options_destroy(fontOptions);
if (!mScaledFont ||
cairo_scaled_font_status(mScaledFont) != CAIRO_STATUS_SUCCESS) {
#ifdef DEBUG
char warnBuf[1024];
sprintf(warnBuf, "Failed to create scaled font: %s status: %d",
NS_ConvertUTF16toUTF8(mFontEntry->Name()).get(),
mScaledFont ? cairo_scaled_font_status(mScaledFont) : 0);
NS_WARNING(warnBuf);
#endif
mIsValid = false;
} else {
mIsValid = true;
}
#if 0
printf("Font: %p (%s) size: %f adjusted size: %f valid: %s\n", this,
NS_ConvertUTF16toUTF8(GetName()).get(), mStyle.size, mAdjustedSize, (mIsValid ? "yes" : "no"));
printf(" emHeight: %f emAscent: %f emDescent: %f\n", mMetrics->emHeight, mMetrics->emAscent, mMetrics->emDescent);
printf(" maxAscent: %f maxDescent: %f maxAdvance: %f\n", mMetrics->maxAscent, mMetrics->maxDescent, mMetrics->maxAdvance);
printf(" internalLeading: %f externalLeading: %f\n", mMetrics->internalLeading, mMetrics->externalLeading);
printf(" spaceWidth: %f aveCharWidth: %f xHeight: %f\n", mMetrics->spaceWidth, mMetrics->aveCharWidth, mMetrics->xHeight);
printf(" uOff: %f uSize: %f stOff: %f stSize: %f supOff: %f subOff: %f\n",
mMetrics->underlineOffset, mMetrics->underlineSize, mMetrics->strikeoutOffset, mMetrics->strikeoutSize,
mMetrics->superscriptOffset, mMetrics->subscriptOffset);
#endif
}
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;
}
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::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;
}
void
gfxGDIFont::Initialize()
{
NS_ASSERTION(!mMetrics, "re-creating metrics? this will leak");
LOGFONTW logFont;
// Figure out if we want to do synthetic oblique styling.
GDIFontEntry* fe = static_cast<GDIFontEntry*>(GetFontEntry());
bool wantFakeItalic = mStyle.style != NS_FONT_STYLE_NORMAL &&
fe->IsUpright() && mStyle.allowSyntheticStyle;
// If the font's family has an actual italic face (but font matching
// didn't choose it), we have to use a cairo transform instead of asking
// GDI to italicize, because that would use a different face and result
// in a possible glyph ID mismatch between shaping and rendering.
//
// We use the mFamilyHasItalicFace flag in the entry in case of user fonts,
// where the *CSS* family may not know about italic faces that are present
// in the *GDI* family, and which GDI would use if we asked it to perform
// the "italicization".
bool useCairoFakeItalic = wantFakeItalic && fe->mFamilyHasItalicFace;
if (mAdjustedSize == 0.0) {
mAdjustedSize = mStyle.size;
if (mStyle.sizeAdjust > 0.0 && mAdjustedSize > 0.0) {
// to implement font-size-adjust, we first create the "unadjusted" font
FillLogFont(logFont, mAdjustedSize,
wantFakeItalic && !useCairoFakeItalic);
mFont = ::CreateFontIndirectW(&logFont);
// initialize its metrics so we can calculate size adjustment
Initialize();
// Unless the font was so small that GDI metrics rounded to zero,
// calculate the properly adjusted size, and then proceed
// to recreate mFont and recalculate metrics
if (mMetrics->xHeight > 0.0 && mMetrics->emHeight > 0.0) {
gfxFloat aspect = mMetrics->xHeight / mMetrics->emHeight;
mAdjustedSize = mStyle.GetAdjustedSize(aspect);
}
// delete the temporary font and metrics
::DeleteObject(mFont);
mFont = nullptr;
delete mMetrics;
mMetrics = nullptr;
} else if (mStyle.sizeAdjust == 0.0) {
mAdjustedSize = 0.0;
}
}
// (bug 724231) for local user fonts, we don't use GDI's synthetic bold,
// as it could lead to a different, incompatible face being used
// but instead do our own multi-striking
if (mNeedsBold && GetFontEntry()->IsLocalUserFont()) {
mApplySyntheticBold = true;
}
// this may end up being zero
mAdjustedSize = ROUND(mAdjustedSize);
FillLogFont(logFont, mAdjustedSize, wantFakeItalic && !useCairoFakeItalic);
mFont = ::CreateFontIndirectW(&logFont);
mMetrics = new gfxFont::Metrics;
::memset(mMetrics, 0, sizeof(*mMetrics));
if (!mFont) {
NS_WARNING("Failed creating GDI font");
mIsValid = false;
return;
}
AutoDC dc;
SetGraphicsMode(dc.GetDC(), GM_ADVANCED);
AutoSelectFont selectFont(dc.GetDC(), mFont);
// Get font metrics if size > 0
if (mAdjustedSize > 0.0) {
OUTLINETEXTMETRIC oMetrics;
TEXTMETRIC& metrics = oMetrics.otmTextMetrics;
if (0 < GetOutlineTextMetrics(dc.GetDC(), sizeof(oMetrics), &oMetrics)) {
mMetrics->strikeoutSize = (double)oMetrics.otmsStrikeoutSize;
mMetrics->strikeoutOffset = (double)oMetrics.otmsStrikeoutPosition;
mMetrics->underlineSize = (double)oMetrics.otmsUnderscoreSize;
mMetrics->underlineOffset = (double)oMetrics.otmsUnderscorePosition;
const MAT2 kIdentityMatrix = { {0, 1}, {0, 0}, {0, 0}, {0, 1} };
GLYPHMETRICS gm;
DWORD len = GetGlyphOutlineW(dc.GetDC(), char16_t('x'), GGO_METRICS, &gm, 0, nullptr, &kIdentityMatrix);
if (len == GDI_ERROR || gm.gmptGlyphOrigin.y <= 0) {
// 56% of ascent, best guess for true type
mMetrics->xHeight =
ROUND((double)metrics.tmAscent * DEFAULT_XHEIGHT_FACTOR);
} else {
mMetrics->xHeight = gm.gmptGlyphOrigin.y;
}
len = GetGlyphOutlineW(dc.GetDC(), char16_t('H'), GGO_METRICS, &gm, 0, nullptr, &kIdentityMatrix);
if (len == GDI_ERROR || gm.gmptGlyphOrigin.y <= 0) {
mMetrics->capHeight = metrics.tmAscent - metrics.tmInternalLeading;
} else {
mMetrics->capHeight = gm.gmptGlyphOrigin.y;
}
mMetrics->emHeight = metrics.tmHeight - metrics.tmInternalLeading;
gfxFloat typEmHeight = (double)oMetrics.otmAscent - (double)oMetrics.otmDescent;
mMetrics->emAscent = ROUND(mMetrics->emHeight * (double)oMetrics.otmAscent / typEmHeight);
mMetrics->emDescent = mMetrics->emHeight - mMetrics->emAscent;
if (oMetrics.otmEMSquare > 0) {
mFUnitsConvFactor = float(mAdjustedSize / oMetrics.otmEMSquare);
}
} else {
// Make a best-effort guess at extended metrics
// this is based on general typographic guidelines
// GetTextMetrics can fail if the font file has been removed
// or corrupted recently.
BOOL result = GetTextMetrics(dc.GetDC(), &metrics);
if (!result) {
NS_WARNING("Missing or corrupt font data, fasten your seatbelt");
mIsValid = false;
memset(mMetrics, 0, sizeof(*mMetrics));
return;
}
mMetrics->xHeight =
ROUND((float)metrics.tmAscent * DEFAULT_XHEIGHT_FACTOR);
mMetrics->strikeoutSize = 1;
mMetrics->strikeoutOffset = ROUND(mMetrics->xHeight * 0.5f); // 50% of xHeight
mMetrics->underlineSize = 1;
mMetrics->underlineOffset = -ROUND((float)metrics.tmDescent * 0.30f); // 30% of descent
mMetrics->emHeight = metrics.tmHeight - metrics.tmInternalLeading;
mMetrics->emAscent = metrics.tmAscent - metrics.tmInternalLeading;
mMetrics->emDescent = metrics.tmDescent;
mMetrics->capHeight = mMetrics->emAscent;
}
mMetrics->internalLeading = metrics.tmInternalLeading;
mMetrics->externalLeading = metrics.tmExternalLeading;
mMetrics->maxHeight = metrics.tmHeight;
mMetrics->maxAscent = metrics.tmAscent;
mMetrics->maxDescent = metrics.tmDescent;
mMetrics->maxAdvance = metrics.tmMaxCharWidth;
mMetrics->aveCharWidth = std::max<gfxFloat>(1, metrics.tmAveCharWidth);
// The font is monospace when TMPF_FIXED_PITCH is *not* set!
// See http://msdn2.microsoft.com/en-us/library/ms534202(VS.85).aspx
if (!(metrics.tmPitchAndFamily & TMPF_FIXED_PITCH)) {
mMetrics->maxAdvance = mMetrics->aveCharWidth;
}
// For fonts with USE_TYPO_METRICS set in the fsSelection field,
// let the OS/2 sTypo* metrics override the previous values.
// (see http://www.microsoft.com/typography/otspec/os2.htm#fss)
// Using the equivalent values from oMetrics provides inconsistent
// results with CFF fonts, so we instead rely on OS2Table.
gfxFontEntry::AutoTable os2Table(mFontEntry,
TRUETYPE_TAG('O','S','/','2'));
if (os2Table) {
uint32_t len;
const OS2Table *os2 =
reinterpret_cast<const OS2Table*>(hb_blob_get_data(os2Table,
&len));
if (len >= offsetof(OS2Table, sTypoLineGap) + sizeof(int16_t)) {
const uint16_t kUseTypoMetricsMask = 1 << 7;
if ((uint16_t(os2->fsSelection) & kUseTypoMetricsMask)) {
double ascent = int16_t(os2->sTypoAscender);
double descent = int16_t(os2->sTypoDescender);
double lineGap = int16_t(os2->sTypoLineGap);
mMetrics->maxAscent = ROUND(ascent * mFUnitsConvFactor);
mMetrics->maxDescent = -ROUND(descent * mFUnitsConvFactor);
mMetrics->maxHeight =
mMetrics->maxAscent + mMetrics->maxDescent;
mMetrics->internalLeading =
mMetrics->maxHeight - mMetrics->emHeight;
gfxFloat lineHeight =
ROUND((ascent - descent + lineGap) * mFUnitsConvFactor);
lineHeight = std::max(lineHeight, mMetrics->maxHeight);
mMetrics->externalLeading =
lineHeight - mMetrics->maxHeight;
}
}
// although sxHeight and sCapHeight are signed fields, we consider
// negative values to be erroneous and just ignore them
if (uint16_t(os2->version) >= 2) {
// version 2 and later includes the x-height and cap-height fields
if (len >= offsetof(OS2Table, sxHeight) + sizeof(int16_t) &&
int16_t(os2->sxHeight) > 0) {
mMetrics->xHeight = ROUND(int16_t(os2->sxHeight) * mFUnitsConvFactor);
}
if (len >= offsetof(OS2Table, sCapHeight) + sizeof(int16_t) &&
int16_t(os2->sCapHeight) > 0) {
mMetrics->capHeight = ROUND(int16_t(os2->sCapHeight) * mFUnitsConvFactor);
}
}
}
WORD glyph;
SIZE size;
DWORD ret = GetGlyphIndicesW(dc.GetDC(), L" ", 1, &glyph,
GGI_MARK_NONEXISTING_GLYPHS);
if (ret != GDI_ERROR && glyph != 0xFFFF) {
mSpaceGlyph = glyph;
// Cache the width of a single space.
GetTextExtentPoint32W(dc.GetDC(), L" ", 1, &size);
mMetrics->spaceWidth = ROUND(size.cx);
} else {
mMetrics->spaceWidth = mMetrics->aveCharWidth;
}
// Cache the width of digit zero, if available.
ret = GetGlyphIndicesW(dc.GetDC(), L"0", 1, &glyph,
GGI_MARK_NONEXISTING_GLYPHS);
if (ret != GDI_ERROR && glyph != 0xFFFF) {
GetTextExtentPoint32W(dc.GetDC(), L"0", 1, &size);
mMetrics->zeroOrAveCharWidth = ROUND(size.cx);
} else {
mMetrics->zeroOrAveCharWidth = mMetrics->aveCharWidth;
}
SanitizeMetrics(mMetrics, GetFontEntry()->mIsBadUnderlineFont);
} else {
mFUnitsConvFactor = 0.0; // zero-sized font: all values scale to zero
}
if (IsSyntheticBold()) {
mMetrics->aveCharWidth += GetSyntheticBoldOffset();
mMetrics->maxAdvance += GetSyntheticBoldOffset();
}
mFontFace = cairo_win32_font_face_create_for_logfontw_hfont(&logFont,
mFont);
cairo_matrix_t sizeMatrix, ctm;
cairo_matrix_init_identity(&ctm);
cairo_matrix_init_scale(&sizeMatrix, mAdjustedSize, mAdjustedSize);
if (useCairoFakeItalic) {
// Skew the matrix to do fake italic if it wasn't already applied
// via the LOGFONT
double skewfactor = OBLIQUE_SKEW_FACTOR;
cairo_matrix_t style;
cairo_matrix_init(&style,
1, //xx
0, //yx
-1 * skewfactor, //xy
1, //yy
0, //x0
0); //y0
cairo_matrix_multiply(&sizeMatrix, &sizeMatrix, &style);
}
cairo_font_options_t *fontOptions = cairo_font_options_create();
if (mAntialiasOption != kAntialiasDefault) {
cairo_font_options_set_antialias(fontOptions,
GetCairoAntialiasOption(mAntialiasOption));
}
mScaledFont = cairo_scaled_font_create(mFontFace, &sizeMatrix,
&ctm, fontOptions);
cairo_font_options_destroy(fontOptions);
if (!mScaledFont ||
cairo_scaled_font_status(mScaledFont) != CAIRO_STATUS_SUCCESS) {
#ifdef DEBUG
char warnBuf[1024];
SprintfLiteral(warnBuf, "Failed to create scaled font: %s status: %d",
NS_ConvertUTF16toUTF8(mFontEntry->Name()).get(),
mScaledFont ? cairo_scaled_font_status(mScaledFont) : 0);
NS_WARNING(warnBuf);
#endif
mIsValid = false;
} else {
mIsValid = true;
}
#if 0
printf("Font: %p (%s) size: %f adjusted size: %f valid: %s\n", this,
NS_ConvertUTF16toUTF8(GetName()).get(), mStyle.size, mAdjustedSize, (mIsValid ? "yes" : "no"));
printf(" emHeight: %f emAscent: %f emDescent: %f\n", mMetrics->emHeight, mMetrics->emAscent, mMetrics->emDescent);
printf(" maxAscent: %f maxDescent: %f maxAdvance: %f\n", mMetrics->maxAscent, mMetrics->maxDescent, mMetrics->maxAdvance);
printf(" internalLeading: %f externalLeading: %f\n", mMetrics->internalLeading, mMetrics->externalLeading);
printf(" spaceWidth: %f aveCharWidth: %f\n", mMetrics->spaceWidth, mMetrics->aveCharWidth);
printf(" xHeight: %f capHeight: %f\n", mMetrics->xHeight, mMetrics->capHeight);
printf(" uOff: %f uSize: %f stOff: %f stSize: %f\n",
mMetrics->underlineOffset, mMetrics->underlineSize, mMetrics->strikeoutOffset, mMetrics->strikeoutSize);
#endif
}