AuroraMiddleware/skia2
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Simulated fonts aren't TrueType fonts.

Browse Source 
Some font back-ends provide simulated fonts such as fake bold or fake
oblique. These fonts should not be reported as TrueType, since the font
data isn't what is actually used to draw the glyphs.

BUG=chromium:639198
BUG=chromium:614612
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2333423002

Review-Url: https://codereview.chromium.org/2333423002
This commit is contained in:
bungeman 2016-09-13 14:03:54 -07:00 committed by Commit bot
parent ceb93abddc
commit 0b7758236c
2 changed files with 27 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
src/ports/SkFontMgr_fontconfig.cpp
View File

@ -5,6 +5,7 @@
* found in the LICENSE file.
*/
#include "SkAdvancedTypefaceMetrics.h"
#include "SkDataTable.h"
#include "SkFixed.h"
#include "SkFontDescriptor.h"
@ -484,6 +485,20 @@ public:
this->INHERITED::onFilterRec(rec);
}
SkAdvancedTypefaceMetrics* onGetAdvancedTypefaceMetrics(PerGlyphInfo perGlyphInfo,
const uint32_t* glyphIDs,
uint32_t glyphIDsCount) const override
{
SkAdvancedTypefaceMetrics* info =
this->INHERITED::onGetAdvancedTypefaceMetrics(perGlyphInfo, glyphIDs, glyphIDsCount);
// Simulated fonts shouldn't be considered to be of the type of their data.
if (get_matrix(fPattern, FC_MATRIX) || get_bool(fPattern, FC_EMBOLDEN)) {
info->fType = SkAdvancedTypefaceMetrics::kOther_Font;
}
return info;
}
virtual ~SkTypeface_fontconfig() {
// Hold the lock while unrefing the pattern.
FCLocker lock;

26
src/ports/SkTypeface_win_dw.cpp
View File

@ -331,6 +331,10 @@ SkAdvancedTypefaceMetrics* DWriteFontTypeface::onGetAdvancedTypefaceMetrics(
info->fEmSize = dwfm.designUnitsPerEm;
info->fLastGlyphID = SkToU16(glyphCount - 1);
info->fAscent = SkToS16(dwfm.ascent);
info->fDescent = SkToS16(dwfm.descent);
info->fCapHeight = SkToS16(dwfm.capHeight);
// SkAdvancedTypefaceMetrics::fFontName is in theory supposed to be
// the PostScript name of the font. However, due to the way it is currently
// used, it must actually be a family name.
@ -350,24 +354,22 @@ SkAdvancedTypefaceMetrics* DWriteFontTypeface::onGetAdvancedTypefaceMetrics(
}
DWRITE_FONT_FACE_TYPE fontType = fDWriteFontFace->GetType();
if (fontType == DWRITE_FONT_FACE_TYPE_TRUETYPE ||
fontType == DWRITE_FONT_FACE_TYPE_TRUETYPE_COLLECTION) {
info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font;
} else {
info->fAscent = dwfm.ascent;
info->fDescent = dwfm.descent;
info->fCapHeight = dwfm.capHeight;
if (fontType != DWRITE_FONT_FACE_TYPE_TRUETYPE &&
fontType != DWRITE_FONT_FACE_TYPE_TRUETYPE_COLLECTION)
{
return info;
}
// Simulated fonts aren't really TrueType fonts.
if (fDWriteFontFace->GetSimulations() == DWRITE_FONT_SIMULATIONS_NONE) {
info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font;
}
AutoTDWriteTable<SkOTTableHead> headTable(fDWriteFontFace.get());
AutoTDWriteTable<SkOTTablePostScript> postTable(fDWriteFontFace.get());
AutoTDWriteTable<SkOTTableHorizontalHeader> hheaTable(fDWriteFontFace.get());
AutoTDWriteTable<SkOTTableOS2> os2Table(fDWriteFontFace.get());
if (!headTable.fExists || !postTable.fExists || !hheaTable.fExists || !os2Table.fExists) {
info->fAscent = dwfm.ascent;
info->fDescent = dwfm.descent;
info->fCapHeight = dwfm.capHeight;
return info;
}
@ -406,10 +408,6 @@ SkAdvancedTypefaceMetrics* DWriteFontTypeface::onGetAdvancedTypefaceMetrics(
info->fItalicAngle = SkEndian_SwapBE32(postTable->italicAngle) >> 16;
info->fAscent = SkToS16(dwfm.ascent);
info->fDescent = SkToS16(dwfm.descent);
info->fCapHeight = SkToS16(dwfm.capHeight);
info->fBBox = SkIRect::MakeLTRB((int32_t)SkEndian_SwapBE16((uint16_t)headTable->xMin),
(int32_t)SkEndian_SwapBE16((uint16_t)headTable->yMax),
(int32_t)SkEndian_SwapBE16((uint16_t)headTable->xMax),