george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2006-2012 The Android Open Source Project |
| 3 | * Copyright 2012 Mozilla Foundation |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
| 8 | |
| 9 | #ifndef SKFONTHOST_FREETYPE_COMMON_H_ |
| 10 | #define SKFONTHOST_FREETYPE_COMMON_H_ |
| 11 | |
| 12 | #include "SkGlyph.h" |
| 13 | #include "SkScalerContext.h" |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 14 | #include "SkTypeface.h" |
| 15 | |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 16 | #include <ft2build.h> |
| 17 | #include FT_FREETYPE_H |
| 18 | |
| 19 | #ifdef SK_DEBUG |
| 20 | #define SkASSERT_CONTINUE(pred) \ |
| 21 | do { \ |
| 22 | if (!(pred)) \ |
| 23 | SkDebugf("file %s:%d: assert failed '" #pred "'\n", __FILE__, __LINE__); \ |
| 24 | } while (false) |
| 25 | #else |
| 26 | #define SkASSERT_CONTINUE(pred) |
| 27 | #endif |
| 28 | |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 29 | class SkScalerContext_FreeType_Base : public SkScalerContext { |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 30 | protected: |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 31 | // See http://freetype.sourceforge.net/freetype2/docs/reference/ft2-bitmap_handling.html#FT_Bitmap_Embolden |
| 32 | // This value was chosen by eyeballing the result in Firefox and trying to match it. |
| 33 | static const FT_Pos kBitmapEmboldenStrength = 1 << 6; |
skia.committer@gmail.com | 01c34ee | 2013-03-20 07:01:02 +0000 | [diff] [blame] | 34 | |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 35 | SkScalerContext_FreeType_Base(SkTypeface* typeface, const SkDescriptor *desc) |
| 36 | : INHERITED(typeface, desc) |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 37 | {} |
skia.committer@gmail.com | 01c34ee | 2013-03-20 07:01:02 +0000 | [diff] [blame] | 38 | |
bungeman@google.com | a76de72 | 2012-10-26 19:35:54 +0000 | [diff] [blame] | 39 | void generateGlyphImage(FT_Face face, const SkGlyph& glyph); |
sugoi@google.com | 66a58ac | 2013-03-05 20:40:52 +0000 | [diff] [blame] | 40 | void generateGlyphPath(FT_Face face, SkPath* path); |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 41 | |
| 42 | private: |
| 43 | typedef SkScalerContext INHERITED; |
| 44 | }; |
| 45 | |
| 46 | class SkTypeface_FreeType : public SkTypeface { |
bungeman | 3a21d61 | 2014-07-11 08:52:26 -0700 | [diff] [blame] | 47 | public: |
| 48 | /** For SkFontMgrs to make use of our ability to extract |
| 49 | * name and style from a stream, using FreeType's API. |
| 50 | */ |
| 51 | static bool ScanFont(SkStream* stream, int ttcIndex, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame^] | 52 | SkString* name, SkFontStyle* style, bool* isFixedPitch); |
bungeman | 3a21d61 | 2014-07-11 08:52:26 -0700 | [diff] [blame] | 53 | |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 54 | protected: |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame^] | 55 | SkTypeface_FreeType(const SkFontStyle& style, SkFontID uniqueID, bool isFixedPitch) |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 56 | : INHERITED(style, uniqueID, isFixedPitch) |
| 57 | , fGlyphCount(-1) |
| 58 | {} |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 59 | |
| 60 | virtual SkScalerContext* onCreateScalerContext( |
| 61 | const SkDescriptor*) const SK_OVERRIDE; |
| 62 | virtual void onFilterRec(SkScalerContextRec*) const SK_OVERRIDE; |
reed@google.com | 2689f61 | 2013-03-20 20:01:47 +0000 | [diff] [blame] | 63 | virtual SkAdvancedTypefaceMetrics* onGetAdvancedTypefaceMetrics( |
| 64 | SkAdvancedTypefaceMetrics::PerGlyphInfo, |
| 65 | const uint32_t*, uint32_t) const SK_OVERRIDE; |
reed@google.com | 38c37dd | 2013-03-21 15:36:26 +0000 | [diff] [blame] | 66 | virtual int onGetUPEM() const SK_OVERRIDE; |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 67 | virtual bool onGetKerningPairAdjustments(const uint16_t glyphs[], int count, |
| 68 | int32_t adjustments[]) const SK_OVERRIDE; |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 69 | virtual int onCharsToGlyphs(const void* chars, Encoding, uint16_t glyphs[], |
| 70 | int glyphCount) const SK_OVERRIDE; |
| 71 | virtual int onCountGlyphs() const SK_OVERRIDE; |
| 72 | |
bungeman@google.com | 839702b | 2013-08-07 17:09:22 +0000 | [diff] [blame] | 73 | virtual LocalizedStrings* onCreateFamilyNameIterator() const SK_OVERRIDE; |
bungeman@google.com | a980269 | 2013-08-07 02:45:25 +0000 | [diff] [blame] | 74 | |
bungeman@google.com | ddc218e | 2013-08-01 22:29:43 +0000 | [diff] [blame] | 75 | virtual int onGetTableTags(SkFontTableTag tags[]) const SK_OVERRIDE; |
| 76 | virtual size_t onGetTableData(SkFontTableTag, size_t offset, |
| 77 | size_t length, void* data) const SK_OVERRIDE; |
| 78 | |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 79 | private: |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 80 | mutable int fGlyphCount; |
| 81 | |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 82 | typedef SkTypeface INHERITED; |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 83 | }; |
| 84 | |
| 85 | #endif // SKFONTHOST_FREETYPE_COMMON_H_ |