| /* |
| * Copyright 2006-2012 The Android Open Source Project |
| * Copyright 2012 Mozilla Foundation |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SKFONTHOST_FREETYPE_COMMON_H_ |
| #define SKFONTHOST_FREETYPE_COMMON_H_ |
| |
| #include "SkGlyph.h" |
| #include "SkScalerContext.h" |
| #include "SkTypeface.h" |
| |
| #include <ft2build.h> |
| #include FT_FREETYPE_H |
| |
| #ifdef SK_DEBUG |
| #define SkASSERT_CONTINUE(pred) \ |
| do { \ |
| if (!(pred)) \ |
| SkDebugf("file %s:%d: assert failed '" #pred "'\n", __FILE__, __LINE__); \ |
| } while (false) |
| #else |
| #define SkASSERT_CONTINUE(pred) |
| #endif |
| |
| class SkScalerContext_FreeType_Base : public SkScalerContext { |
| protected: |
| // See http://freetype.sourceforge.net/freetype2/docs/reference/ft2-bitmap_handling.html#FT_Bitmap_Embolden |
| // This value was chosen by eyeballing the result in Firefox and trying to match it. |
| static const FT_Pos kBitmapEmboldenStrength = 1 << 6; |
| |
| SkScalerContext_FreeType_Base(SkTypeface* typeface, const SkDescriptor *desc) |
| : INHERITED(typeface, desc) |
| {} |
| |
| void generateGlyphImage(FT_Face face, const SkGlyph& glyph); |
| void generateGlyphPath(FT_Face face, SkPath* path); |
| |
| private: |
| typedef SkScalerContext INHERITED; |
| }; |
| |
| class SkTypeface_FreeType : public SkTypeface { |
| public: |
| /** For SkFontMgrs to make use of our ability to extract |
| * name and style from a stream, using FreeType's API. |
| */ |
| static bool ScanFont(SkStream* stream, int ttcIndex, |
| SkString* name, SkTypeface::Style* style, bool* isFixedPitch); |
| |
| protected: |
| SkTypeface_FreeType(Style style, SkFontID uniqueID, bool isFixedPitch) |
| : INHERITED(style, uniqueID, isFixedPitch) |
| , fGlyphCount(-1) |
| {} |
| |
| virtual SkScalerContext* onCreateScalerContext( |
| const SkDescriptor*) const SK_OVERRIDE; |
| virtual void onFilterRec(SkScalerContextRec*) const SK_OVERRIDE; |
| virtual SkAdvancedTypefaceMetrics* onGetAdvancedTypefaceMetrics( |
| SkAdvancedTypefaceMetrics::PerGlyphInfo, |
| const uint32_t*, uint32_t) const SK_OVERRIDE; |
| virtual int onGetUPEM() const SK_OVERRIDE; |
| virtual bool onGetKerningPairAdjustments(const uint16_t glyphs[], int count, |
| int32_t adjustments[]) const SK_OVERRIDE; |
| virtual int onCharsToGlyphs(const void* chars, Encoding, uint16_t glyphs[], |
| int glyphCount) const SK_OVERRIDE; |
| virtual int onCountGlyphs() const SK_OVERRIDE; |
| |
| virtual LocalizedStrings* onCreateFamilyNameIterator() const SK_OVERRIDE; |
| |
| virtual int onGetTableTags(SkFontTableTag tags[]) const SK_OVERRIDE; |
| virtual size_t onGetTableData(SkFontTableTag, size_t offset, |
| size_t length, void* data) const SK_OVERRIDE; |
| |
| private: |
| mutable int fGlyphCount; |
| |
| typedef SkTypeface INHERITED; |
| }; |
| |
| #endif // SKFONTHOST_FREETYPE_COMMON_H_ |