epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2006 The Android Open Source Project |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
commit-bot@chromium.org | ba9354b | 2014-02-10 19:58:49 +0000 | [diff] [blame] | 8 | #include "SkAdvancedTypefaceMetrics.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 9 | #include "SkBitmap.h" |
| 10 | #include "SkCanvas.h" |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 11 | #include "SkColorPriv.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 12 | #include "SkDescriptor.h" |
| 13 | #include "SkFDot6.h" |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 14 | #include "SkFontDescriptor.h" |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 15 | #include "SkFontHost_FreeType_common.h" |
bungeman@google.com | bbe5013 | 2012-07-24 20:33:21 +0000 | [diff] [blame] | 16 | #include "SkGlyph.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 17 | #include "SkMask.h" |
bungeman@google.com | 97efada | 2012-07-30 20:40:50 +0000 | [diff] [blame] | 18 | #include "SkMaskGamma.h" |
bungeman@google.com | d3fbd34 | 2014-04-15 15:52:07 +0000 | [diff] [blame] | 19 | #include "SkMatrix22.h" |
mtklein | 1b24933 | 2015-07-07 12:21:21 -0700 | [diff] [blame] | 20 | #include "SkMutex.h" |
bungeman@google.com | a980269 | 2013-08-07 02:45:25 +0000 | [diff] [blame] | 21 | #include "SkOTUtils.h" |
bungeman | d3ebb48 | 2015-08-05 13:57:49 -0700 | [diff] [blame] | 22 | #include "SkPath.h" |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 23 | #include "SkScalerContext.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 24 | #include "SkStream.h" |
| 25 | #include "SkString.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 26 | #include "SkTemplates.h" |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 27 | #include "SkTypes.h" |
mtklein | 5f939ab | 2016-03-16 10:28:35 -0700 | [diff] [blame] | 28 | #include <memory> |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 29 | |
bungeman@google.com | fd668cf | 2012-08-24 17:46:11 +0000 | [diff] [blame] | 30 | #if defined(SK_CAN_USE_DLOPEN) |
| 31 | #include <dlfcn.h> |
| 32 | #endif |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 33 | #include <ft2build.h> |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 34 | #include FT_ADVANCES_H |
| 35 | #include FT_BITMAP_H |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 36 | #include FT_FREETYPE_H |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 37 | #include FT_LCD_FILTER_H |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 38 | #include FT_MODULE_H |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 39 | #include FT_MULTIPLE_MASTERS_H |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 40 | #include FT_OUTLINE_H |
| 41 | #include FT_SIZES_H |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 42 | #include FT_SYSTEM_H |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 43 | #include FT_TRUETYPE_TABLES_H |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 44 | #include FT_TYPE1_TABLES_H |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 45 | #include FT_XFREE86_H |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 46 | |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 47 | // FT_LOAD_COLOR and the corresponding FT_Pixel_Mode::FT_PIXEL_MODE_BGRA |
| 48 | // were introduced in FreeType 2.5.0. |
| 49 | // The following may be removed once FreeType 2.5.0 is required to build. |
| 50 | #ifndef FT_LOAD_COLOR |
| 51 | # define FT_LOAD_COLOR ( 1L << 20 ) |
| 52 | # define FT_PIXEL_MODE_BGRA 7 |
| 53 | #endif |
| 54 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 55 | //#define ENABLE_GLYPH_SPEW // for tracing calls |
| 56 | //#define DUMP_STRIKE_CREATION |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 57 | //#define SK_FONTHOST_FREETYPE_USE_NORMAL_LCD_FILTER |
| 58 | //#define SK_FONTHOST_FREETYPE_RUNTIME_VERSION |
reed@google.com | 1ac8350 | 2012-02-28 17:06:02 +0000 | [diff] [blame] | 59 | //#define SK_GAMMA_APPLY_TO_A8 |
reed@google.com | 1ac8350 | 2012-02-28 17:06:02 +0000 | [diff] [blame] | 60 | |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 61 | static bool isLCD(const SkScalerContext::Rec& rec) { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 62 | return SkMask::kLCD16_Format == rec.fMaskFormat; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 63 | } |
| 64 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 65 | ////////////////////////////////////////////////////////////////////////// |
| 66 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 67 | extern "C" { |
| 68 | static void* sk_ft_alloc(FT_Memory, long size) { |
| 69 | return sk_malloc_throw(size); |
| 70 | } |
| 71 | static void sk_ft_free(FT_Memory, void* block) { |
| 72 | sk_free(block); |
| 73 | } |
| 74 | static void* sk_ft_realloc(FT_Memory, long cur_size, long new_size, void* block) { |
| 75 | return sk_realloc_throw(block, new_size); |
| 76 | } |
| 77 | }; |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 78 | FT_MemoryRec_ gFTMemory = { nullptr, sk_ft_alloc, sk_ft_free, sk_ft_realloc }; |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 79 | |
| 80 | class FreeTypeLibrary : SkNoncopyable { |
| 81 | public: |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 82 | FreeTypeLibrary() : fLibrary(nullptr), fIsLCDSupported(false), fLCDExtra(0) { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 83 | if (FT_New_Library(&gFTMemory, &fLibrary)) { |
| 84 | return; |
| 85 | } |
| 86 | FT_Add_Default_Modules(fLibrary); |
| 87 | |
| 88 | // Setup LCD filtering. This reduces color fringes for LCD smoothed glyphs. |
| 89 | // Default { 0x10, 0x40, 0x70, 0x40, 0x10 } adds up to 0x110, simulating ink spread. |
| 90 | // SetLcdFilter must be called before SetLcdFilterWeights. |
| 91 | if (FT_Library_SetLcdFilter(fLibrary, FT_LCD_FILTER_DEFAULT) == 0) { |
| 92 | fIsLCDSupported = true; |
| 93 | fLCDExtra = 2; //Using a filter adds one full pixel to each side. |
| 94 | |
| 95 | #ifdef SK_FONTHOST_FREETYPE_USE_NORMAL_LCD_FILTER |
| 96 | // Adds to 0x110 simulating ink spread, but provides better results than default. |
| 97 | static unsigned char gGaussianLikeHeavyWeights[] = { 0x1A, 0x43, 0x56, 0x43, 0x1A, }; |
| 98 | |
| 99 | # if SK_FONTHOST_FREETYPE_RUNTIME_VERSION > 0x020400 |
| 100 | FT_Library_SetLcdFilterWeights(fLibrary, gGaussianLikeHeavyWeights); |
| 101 | # elif SK_CAN_USE_DLOPEN == 1 |
| 102 | //The FreeType library is already loaded, so symbols are available in process. |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 103 | void* self = dlopen(nullptr, RTLD_LAZY); |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 104 | if (self) { |
| 105 | FT_Library_SetLcdFilterWeightsProc setLcdFilterWeights; |
| 106 | //The following cast is non-standard, but safe for POSIX. |
| 107 | *reinterpret_cast<void**>(&setLcdFilterWeights) = |
| 108 | dlsym(self, "FT_Library_SetLcdFilterWeights"); |
| 109 | dlclose(self); |
| 110 | |
| 111 | if (setLcdFilterWeights) { |
| 112 | setLcdFilterWeights(fLibrary, gGaussianLikeHeavyWeights); |
| 113 | } |
| 114 | } |
| 115 | # endif |
| 116 | #endif |
| 117 | } |
| 118 | } |
| 119 | ~FreeTypeLibrary() { |
| 120 | if (fLibrary) { |
| 121 | FT_Done_Library(fLibrary); |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | FT_Library library() { return fLibrary; } |
| 126 | bool isLCDSupported() { return fIsLCDSupported; } |
| 127 | int lcdExtra() { return fLCDExtra; } |
| 128 | |
| 129 | private: |
| 130 | FT_Library fLibrary; |
| 131 | bool fIsLCDSupported; |
| 132 | int fLCDExtra; |
| 133 | |
| 134 | // FT_Library_SetLcdFilterWeights was introduced in FreeType 2.4.0. |
| 135 | // The following platforms provide FreeType of at least 2.4.0. |
| 136 | // Ubuntu >= 11.04 (previous deprecated April 2013) |
| 137 | // Debian >= 6.0 (good) |
| 138 | // OpenSuse >= 11.4 (previous deprecated January 2012 / Nov 2013 for Evergreen 11.2) |
| 139 | // Fedora >= 14 (good) |
| 140 | // Android >= Gingerbread (good) |
| 141 | typedef FT_Error (*FT_Library_SetLcdFilterWeightsProc)(FT_Library, unsigned char*); |
| 142 | }; |
| 143 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 144 | struct SkFaceRec; |
| 145 | |
reed | 086eea9 | 2016-05-04 17:12:46 -0700 | [diff] [blame] | 146 | SK_DECLARE_STATIC_MUTEX(gFTMutex); |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 147 | static FreeTypeLibrary* gFTLibrary; |
| 148 | static SkFaceRec* gFaceRecHead; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 149 | |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 150 | // Private to ref_ft_library and unref_ft_library |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 151 | static int gFTCount; |
bungeman@google.com | fd668cf | 2012-08-24 17:46:11 +0000 | [diff] [blame] | 152 | |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 153 | // Caller must lock gFTMutex before calling this function. |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 154 | static bool ref_ft_library() { |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 155 | gFTMutex.assertHeld(); |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 156 | SkASSERT(gFTCount >= 0); |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 157 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 158 | if (0 == gFTCount) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 159 | SkASSERT(nullptr == gFTLibrary); |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 160 | gFTLibrary = new FreeTypeLibrary; |
reed@google.com | ea2333d | 2011-03-14 16:44:56 +0000 | [diff] [blame] | 161 | } |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 162 | ++gFTCount; |
| 163 | return gFTLibrary->library(); |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 164 | } |
| 165 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 166 | // Caller must lock gFTMutex before calling this function. |
| 167 | static void unref_ft_library() { |
| 168 | gFTMutex.assertHeld(); |
| 169 | SkASSERT(gFTCount > 0); |
commit-bot@chromium.org | ba9354b | 2014-02-10 19:58:49 +0000 | [diff] [blame] | 170 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 171 | --gFTCount; |
| 172 | if (0 == gFTCount) { |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 173 | SkASSERT(nullptr == gFaceRecHead); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 174 | SkASSERT(nullptr != gFTLibrary); |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 175 | delete gFTLibrary; |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 176 | SkDEBUGCODE(gFTLibrary = nullptr;) |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 177 | } |
reed@google.com | fb2fdcc | 2012-10-17 15:49:36 +0000 | [diff] [blame] | 178 | } |
| 179 | |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 180 | class SkScalerContext_FreeType : public SkScalerContext_FreeType_Base { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 181 | public: |
reed | a9322c2 | 2016-04-12 06:47:05 -0700 | [diff] [blame] | 182 | SkScalerContext_FreeType(SkTypeface*, const SkScalerContextEffects&, const SkDescriptor* desc); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 183 | virtual ~SkScalerContext_FreeType(); |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 184 | |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 185 | bool success() const { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 186 | return fFTSize != nullptr && fFace != nullptr; |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 187 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 188 | |
| 189 | protected: |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 190 | unsigned generateGlyphCount() override; |
| 191 | uint16_t generateCharToGlyph(SkUnichar uni) override; |
| 192 | void generateAdvance(SkGlyph* glyph) override; |
| 193 | void generateMetrics(SkGlyph* glyph) override; |
| 194 | void generateImage(const SkGlyph& glyph) override; |
| 195 | void generatePath(const SkGlyph& glyph, SkPath* path) override; |
| 196 | void generateFontMetrics(SkPaint::FontMetrics*) override; |
| 197 | SkUnichar generateGlyphToChar(uint16_t glyph) override; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 198 | |
| 199 | private: |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 200 | FT_Face fFace; // Shared face from gFaceRecHead. |
| 201 | FT_Size fFTSize; // The size on the fFace for this scaler. |
| 202 | FT_Int fStrikeIndex; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 203 | |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 204 | /** The rest of the matrix after FreeType handles the size. |
| 205 | * With outline font rasterization this is handled by FreeType with FT_Set_Transform. |
| 206 | * With bitmap only fonts this matrix must be applied to scale the bitmap. |
| 207 | */ |
| 208 | SkMatrix fMatrix22Scalar; |
| 209 | /** Same as fMatrix22Scalar, but in FreeType units and space. */ |
| 210 | FT_Matrix fMatrix22; |
| 211 | /** The actual size requested. */ |
| 212 | SkVector fScale; |
| 213 | |
| 214 | uint32_t fLoadGlyphFlags; |
| 215 | bool fDoLinearMetrics; |
| 216 | bool fLCDIsVert; |
reed@google.com | f073b33 | 2013-05-06 12:21:16 +0000 | [diff] [blame] | 217 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 218 | FT_Error setupSize(); |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 219 | void getBBoxForCurrentGlyph(SkGlyph* glyph, FT_BBox* bbox, |
| 220 | bool snapToPixelBoundary = false); |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 221 | bool getCBoxForLetter(char letter, FT_BBox* bbox); |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 222 | // Caller must lock gFTMutex before calling this function. |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 223 | void updateGlyphIfLCD(SkGlyph* glyph); |
commit-bot@chromium.org | 6fa81d7 | 2013-12-26 15:50:29 +0000 | [diff] [blame] | 224 | // Caller must lock gFTMutex before calling this function. |
| 225 | // update FreeType2 glyph slot with glyph emboldened |
| 226 | void emboldenIfNeeded(FT_Face face, FT_GlyphSlot glyph); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 227 | bool shouldSubpixelBitmap(const SkGlyph&, const SkMatrix&); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 228 | }; |
| 229 | |
| 230 | /////////////////////////////////////////////////////////////////////////// |
| 231 | /////////////////////////////////////////////////////////////////////////// |
| 232 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 233 | struct SkFaceRec { |
bungeman | 52b64b4 | 2015-01-27 10:41:17 -0800 | [diff] [blame] | 234 | SkFaceRec* fNext; |
| 235 | FT_Face fFace; |
| 236 | FT_StreamRec fFTStream; |
| 237 | SkAutoTDelete<SkStreamAsset> fSkStream; |
| 238 | uint32_t fRefCnt; |
| 239 | uint32_t fFontID; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 240 | |
scroggo | a1193e4 | 2015-01-21 12:09:53 -0800 | [diff] [blame] | 241 | // assumes ownership of the stream, will delete when its done |
bungeman | 52b64b4 | 2015-01-27 10:41:17 -0800 | [diff] [blame] | 242 | SkFaceRec(SkStreamAsset* strm, uint32_t fontID); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 243 | }; |
| 244 | |
| 245 | extern "C" { |
bungeman | 52b64b4 | 2015-01-27 10:41:17 -0800 | [diff] [blame] | 246 | static unsigned long sk_ft_stream_io(FT_Stream ftStream, |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 247 | unsigned long offset, |
| 248 | unsigned char* buffer, |
| 249 | unsigned long count) |
| 250 | { |
bungeman | 52b64b4 | 2015-01-27 10:41:17 -0800 | [diff] [blame] | 251 | SkStreamAsset* stream = static_cast<SkStreamAsset*>(ftStream->descriptor.pointer); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 252 | |
| 253 | if (count) { |
bungeman | 52b64b4 | 2015-01-27 10:41:17 -0800 | [diff] [blame] | 254 | if (!stream->seek(offset)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 255 | return 0; |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 256 | } |
bungeman | 52b64b4 | 2015-01-27 10:41:17 -0800 | [diff] [blame] | 257 | count = stream->read(buffer, count); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 258 | } |
| 259 | return count; |
| 260 | } |
| 261 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 262 | static void sk_ft_stream_close(FT_Stream) {} |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 263 | } |
| 264 | |
bungeman | 52b64b4 | 2015-01-27 10:41:17 -0800 | [diff] [blame] | 265 | SkFaceRec::SkFaceRec(SkStreamAsset* stream, uint32_t fontID) |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 266 | : fNext(nullptr), fSkStream(stream), fRefCnt(1), fFontID(fontID) |
bungeman | 52b64b4 | 2015-01-27 10:41:17 -0800 | [diff] [blame] | 267 | { |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 268 | sk_bzero(&fFTStream, sizeof(fFTStream)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 269 | fFTStream.size = fSkStream->getLength(); |
| 270 | fFTStream.descriptor.pointer = fSkStream; |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 271 | fFTStream.read = sk_ft_stream_io; |
| 272 | fFTStream.close = sk_ft_stream_close; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 273 | } |
| 274 | |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 275 | static void ft_face_setup_axes(FT_Face face, const SkFontData& data) { |
| 276 | if (!(face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS)) { |
| 277 | return; |
| 278 | } |
| 279 | |
| 280 | SkDEBUGCODE( |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 281 | FT_MM_Var* variations = nullptr; |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 282 | if (FT_Get_MM_Var(face, &variations)) { |
| 283 | SkDEBUGF(("INFO: font %s claims variations, but none found.\n", face->family_name)); |
| 284 | return; |
| 285 | } |
| 286 | SkAutoFree autoFreeVariations(variations); |
| 287 | |
| 288 | if (static_cast<FT_UInt>(data.getAxisCount()) != variations->num_axis) { |
| 289 | SkDEBUGF(("INFO: font %s has %d variations, but %d were specified.\n", |
| 290 | face->family_name, variations->num_axis, data.getAxisCount())); |
| 291 | return; |
| 292 | } |
| 293 | ) |
| 294 | |
| 295 | SkAutoSTMalloc<4, FT_Fixed> coords(data.getAxisCount()); |
| 296 | for (int i = 0; i < data.getAxisCount(); ++i) { |
| 297 | coords[i] = data.getAxis()[i]; |
| 298 | } |
| 299 | if (FT_Set_Var_Design_Coordinates(face, data.getAxisCount(), coords.get())) { |
| 300 | SkDEBUGF(("INFO: font %s has variations, but specified variations could not be set.\n", |
| 301 | face->family_name)); |
| 302 | return; |
| 303 | } |
| 304 | } |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 305 | |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 306 | // Will return 0 on failure |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 307 | // Caller must lock gFTMutex before calling this function. |
bungeman | 13a007d | 2015-06-19 05:09:39 -0700 | [diff] [blame] | 308 | static FT_Face ref_ft_face(const SkTypeface* typeface) { |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 309 | gFTMutex.assertHeld(); |
| 310 | |
reed@google.com | 2cdc671 | 2013-03-21 18:22:00 +0000 | [diff] [blame] | 311 | const SkFontID fontID = typeface->uniqueID(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 312 | SkFaceRec* rec = gFaceRecHead; |
| 313 | while (rec) { |
| 314 | if (rec->fFontID == fontID) { |
| 315 | SkASSERT(rec->fFace); |
| 316 | rec->fRefCnt += 1; |
bungeman | 13a007d | 2015-06-19 05:09:39 -0700 | [diff] [blame] | 317 | return rec->fFace; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 318 | } |
| 319 | rec = rec->fNext; |
| 320 | } |
| 321 | |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 322 | SkAutoTDelete<SkFontData> data(typeface->createFontData()); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 323 | if (nullptr == data || !data->hasStream()) { |
| 324 | return nullptr; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 325 | } |
| 326 | |
bungeman | 52b64b4 | 2015-01-27 10:41:17 -0800 | [diff] [blame] | 327 | // this passes ownership of stream to the rec |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 328 | rec = new SkFaceRec(data->detachStream(), fontID); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 329 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 330 | FT_Open_Args args; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 331 | memset(&args, 0, sizeof(args)); |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 332 | const void* memoryBase = rec->fSkStream->getMemoryBase(); |
bsalomon | 49f085d | 2014-09-05 13:34:00 -0700 | [diff] [blame] | 333 | if (memoryBase) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 334 | args.flags = FT_OPEN_MEMORY; |
| 335 | args.memory_base = (const FT_Byte*)memoryBase; |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 336 | args.memory_size = rec->fSkStream->getLength(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 337 | } else { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 338 | args.flags = FT_OPEN_STREAM; |
| 339 | args.stream = &rec->fFTStream; |
| 340 | } |
| 341 | |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 342 | FT_Error err = FT_Open_Face(gFTLibrary->library(), &args, data->getIndex(), &rec->fFace); |
| 343 | if (err) { |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 344 | SkDEBUGF(("ERROR: unable to open font '%x'\n", fontID)); |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 345 | delete rec; |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 346 | return nullptr; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 347 | } |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 348 | SkASSERT(rec->fFace); |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 349 | |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 350 | ft_face_setup_axes(rec->fFace, *data); |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 351 | |
bungeman | 726cf90 | 2015-06-05 13:38:12 -0700 | [diff] [blame] | 352 | // FreeType will set the charmap to the "most unicode" cmap if it exists. |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 353 | // If there are no unicode cmaps, the charmap is set to nullptr. |
bungeman | 726cf90 | 2015-06-05 13:38:12 -0700 | [diff] [blame] | 354 | // However, "symbol" cmaps should also be considered "fallback unicode" cmaps |
| 355 | // because they are effectively private use area only (even if they aren't). |
| 356 | // This is the last on the fallback list at |
| 357 | // https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6cmap.html |
| 358 | if (!rec->fFace->charmap) { |
| 359 | FT_Select_Charmap(rec->fFace, FT_ENCODING_MS_SYMBOL); |
| 360 | } |
| 361 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 362 | rec->fNext = gFaceRecHead; |
| 363 | gFaceRecHead = rec; |
bungeman | 13a007d | 2015-06-19 05:09:39 -0700 | [diff] [blame] | 364 | return rec->fFace; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 365 | } |
| 366 | |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 367 | // Caller must lock gFTMutex before calling this function. |
caryclark | fe7ada7 | 2016-03-21 06:55:52 -0700 | [diff] [blame] | 368 | extern void unref_ft_face(FT_Face face); |
| 369 | void unref_ft_face(FT_Face face) { |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 370 | gFTMutex.assertHeld(); |
| 371 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 372 | SkFaceRec* rec = gFaceRecHead; |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 373 | SkFaceRec* prev = nullptr; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 374 | while (rec) { |
| 375 | SkFaceRec* next = rec->fNext; |
| 376 | if (rec->fFace == face) { |
| 377 | if (--rec->fRefCnt == 0) { |
| 378 | if (prev) { |
| 379 | prev->fNext = next; |
| 380 | } else { |
| 381 | gFaceRecHead = next; |
| 382 | } |
| 383 | FT_Done_Face(face); |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 384 | delete rec; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 385 | } |
| 386 | return; |
| 387 | } |
| 388 | prev = rec; |
| 389 | rec = next; |
| 390 | } |
tomhudson@google.com | 0c00f21 | 2011-12-28 14:59:50 +0000 | [diff] [blame] | 391 | SkDEBUGFAIL("shouldn't get here, face not in list"); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 392 | } |
| 393 | |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 394 | class AutoFTAccess { |
| 395 | public: |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 396 | AutoFTAccess(const SkTypeface* tf) : fFace(nullptr) { |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 397 | gFTMutex.acquire(); |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 398 | if (!ref_ft_library()) { |
| 399 | sk_throw(); |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 400 | } |
bungeman | 13a007d | 2015-06-19 05:09:39 -0700 | [diff] [blame] | 401 | fFace = ref_ft_face(tf); |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 402 | } |
| 403 | |
| 404 | ~AutoFTAccess() { |
| 405 | if (fFace) { |
| 406 | unref_ft_face(fFace); |
| 407 | } |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 408 | unref_ft_library(); |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 409 | gFTMutex.release(); |
| 410 | } |
| 411 | |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 412 | FT_Face face() { return fFace; } |
| 413 | |
| 414 | private: |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 415 | FT_Face fFace; |
| 416 | }; |
| 417 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 418 | /////////////////////////////////////////////////////////////////////////// |
| 419 | |
vandebo@chromium.org | 16be6b8 | 2011-01-28 21:28:56 +0000 | [diff] [blame] | 420 | static bool canEmbed(FT_Face face) { |
vandebo@chromium.org | 16be6b8 | 2011-01-28 21:28:56 +0000 | [diff] [blame] | 421 | FT_UShort fsType = FT_Get_FSType_Flags(face); |
| 422 | return (fsType & (FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING | |
| 423 | FT_FSTYPE_BITMAP_EMBEDDING_ONLY)) == 0; |
vandebo@chromium.org | 16be6b8 | 2011-01-28 21:28:56 +0000 | [diff] [blame] | 424 | } |
| 425 | |
vandebo | 0f9bad0 | 2014-06-19 11:05:39 -0700 | [diff] [blame] | 426 | static bool canSubset(FT_Face face) { |
vandebo | 0f9bad0 | 2014-06-19 11:05:39 -0700 | [diff] [blame] | 427 | FT_UShort fsType = FT_Get_FSType_Flags(face); |
| 428 | return (fsType & FT_FSTYPE_NO_SUBSETTING) == 0; |
vandebo | 0f9bad0 | 2014-06-19 11:05:39 -0700 | [diff] [blame] | 429 | } |
| 430 | |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 431 | static bool GetLetterCBox(FT_Face face, char letter, FT_BBox* bbox) { |
| 432 | const FT_UInt glyph_id = FT_Get_Char_Index(face, letter); |
| 433 | if (!glyph_id) |
| 434 | return false; |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 435 | if (FT_Load_Glyph(face, glyph_id, FT_LOAD_NO_SCALE) != 0) |
| 436 | return false; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 437 | FT_Outline_Get_CBox(&face->glyph->outline, bbox); |
| 438 | return true; |
| 439 | } |
| 440 | |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 441 | static void populate_glyph_to_unicode(FT_Face& face, SkTDArray<SkUnichar>* glyphToUnicode) { |
halcanary | f8c74a1 | 2016-04-20 08:37:43 -0700 | [diff] [blame] | 442 | FT_Long numGlyphs = face->num_glyphs; |
| 443 | glyphToUnicode->setCount(SkToInt(numGlyphs)); |
| 444 | sk_bzero(glyphToUnicode->begin(), sizeof((*glyphToUnicode)[0]) * numGlyphs); |
vandebo@chromium.org | 6744d49 | 2011-05-09 18:13:47 +0000 | [diff] [blame] | 445 | |
bungeman | 726cf90 | 2015-06-05 13:38:12 -0700 | [diff] [blame] | 446 | FT_UInt glyphIndex; |
| 447 | SkUnichar charCode = FT_Get_First_Char(face, &glyphIndex); |
| 448 | while (glyphIndex) { |
halcanary | f8c74a1 | 2016-04-20 08:37:43 -0700 | [diff] [blame] | 449 | SkASSERT(glyphIndex < SkToUInt(numGlyphs)); |
bungeman | 726cf90 | 2015-06-05 13:38:12 -0700 | [diff] [blame] | 450 | (*glyphToUnicode)[glyphIndex] = charCode; |
| 451 | charCode = FT_Get_Next_Char(face, charCode, &glyphIndex); |
vandebo@chromium.org | 6744d49 | 2011-05-09 18:13:47 +0000 | [diff] [blame] | 452 | } |
| 453 | } |
| 454 | |
reed@google.com | 2689f61 | 2013-03-20 20:01:47 +0000 | [diff] [blame] | 455 | SkAdvancedTypefaceMetrics* SkTypeface_FreeType::onGetAdvancedTypefaceMetrics( |
reed | 39a9a50 | 2015-05-12 09:50:04 -0700 | [diff] [blame] | 456 | PerGlyphInfo perGlyphInfo, |
vandebo@chromium.org | 37ad8fb | 2011-08-18 02:38:50 +0000 | [diff] [blame] | 457 | const uint32_t* glyphIDs, |
reed@google.com | 2689f61 | 2013-03-20 20:01:47 +0000 | [diff] [blame] | 458 | uint32_t glyphIDsCount) const { |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 459 | AutoFTAccess fta(this); |
| 460 | FT_Face face = fta.face(); |
| 461 | if (!face) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 462 | return nullptr; |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 463 | } |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 464 | |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 465 | SkAdvancedTypefaceMetrics* info = new SkAdvancedTypefaceMetrics; |
| 466 | info->fFontName.set(FT_Get_Postscript_Name(face)); |
vandebo | 0f9bad0 | 2014-06-19 11:05:39 -0700 | [diff] [blame] | 467 | info->fFlags = SkAdvancedTypefaceMetrics::kEmpty_FontFlag; |
| 468 | if (FT_HAS_MULTIPLE_MASTERS(face)) { |
| 469 | info->fFlags = SkTBitOr<SkAdvancedTypefaceMetrics::FontFlags>( |
| 470 | info->fFlags, SkAdvancedTypefaceMetrics::kMultiMaster_FontFlag); |
| 471 | } |
| 472 | if (!canEmbed(face)) { |
| 473 | info->fFlags = SkTBitOr<SkAdvancedTypefaceMetrics::FontFlags>( |
| 474 | info->fFlags, |
| 475 | SkAdvancedTypefaceMetrics::kNotEmbeddable_FontFlag); |
| 476 | } |
| 477 | if (!canSubset(face)) { |
| 478 | info->fFlags = SkTBitOr<SkAdvancedTypefaceMetrics::FontFlags>( |
| 479 | info->fFlags, |
| 480 | SkAdvancedTypefaceMetrics::kNotSubsettable_FontFlag); |
| 481 | } |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 482 | info->fLastGlyphID = face->num_glyphs - 1; |
| 483 | info->fEmSize = 1000; |
| 484 | |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 485 | const char* fontType = FT_Get_X11_Font_Format(face); |
vandebo@chromium.org | c3a2ae5 | 2011-02-03 21:48:23 +0000 | [diff] [blame] | 486 | if (strcmp(fontType, "Type 1") == 0) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 487 | info->fType = SkAdvancedTypefaceMetrics::kType1_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 488 | } else if (strcmp(fontType, "CID Type 1") == 0) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 489 | info->fType = SkAdvancedTypefaceMetrics::kType1CID_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 490 | } else if (strcmp(fontType, "CFF") == 0) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 491 | info->fType = SkAdvancedTypefaceMetrics::kCFF_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 492 | } else if (strcmp(fontType, "TrueType") == 0) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 493 | info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 494 | TT_Header* ttHeader; |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 495 | if ((ttHeader = (TT_Header*)FT_Get_Sfnt_Table(face, ft_sfnt_head)) != nullptr) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 496 | info->fEmSize = ttHeader->Units_Per_EM; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 497 | } |
bungeman@google.com | 4d71db8 | 2013-12-02 19:10:02 +0000 | [diff] [blame] | 498 | } else { |
| 499 | info->fType = SkAdvancedTypefaceMetrics::kOther_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 500 | } |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 501 | |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 502 | info->fStyle = 0; |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 503 | if (FT_IS_FIXED_WIDTH(face)) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 504 | info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style; |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 505 | } |
| 506 | if (face->style_flags & FT_STYLE_FLAG_ITALIC) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 507 | info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style; |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 508 | } |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 509 | |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 510 | PS_FontInfoRec psFontInfo; |
| 511 | TT_Postscript* postTable; |
| 512 | if (FT_Get_PS_Font_Info(face, &psFontInfo) == 0) { |
| 513 | info->fItalicAngle = psFontInfo.italic_angle; |
| 514 | } else if ((postTable = (TT_Postscript*)FT_Get_Sfnt_Table(face, ft_sfnt_post)) != nullptr) { |
| 515 | info->fItalicAngle = SkFixedToScalar(postTable->italicAngle); |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 516 | } else { |
| 517 | info->fItalicAngle = 0; |
| 518 | } |
| 519 | |
| 520 | info->fAscent = face->ascender; |
| 521 | info->fDescent = face->descender; |
| 522 | |
| 523 | // Figure out a good guess for StemV - Min width of i, I, !, 1. |
| 524 | // This probably isn't very good with an italic font. |
| 525 | int16_t min_width = SHRT_MAX; |
vandebo@chromium.org | 6f72d1e | 2011-02-14 23:19:59 +0000 | [diff] [blame] | 526 | info->fStemV = 0; |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 527 | char stem_chars[] = {'i', 'I', '!', '1'}; |
| 528 | for (size_t i = 0; i < SK_ARRAY_COUNT(stem_chars); i++) { |
| 529 | FT_BBox bbox; |
| 530 | if (GetLetterCBox(face, stem_chars[i], &bbox)) { |
| 531 | int16_t width = bbox.xMax - bbox.xMin; |
| 532 | if (width > 0 && width < min_width) { |
| 533 | min_width = width; |
| 534 | info->fStemV = min_width; |
| 535 | } |
| 536 | } |
| 537 | } |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 538 | |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 539 | TT_PCLT* pcltTable; |
| 540 | TT_OS2* os2Table; |
| 541 | if ((pcltTable = (TT_PCLT*)FT_Get_Sfnt_Table(face, ft_sfnt_pclt)) != nullptr) { |
| 542 | info->fCapHeight = pcltTable->CapHeight; |
| 543 | uint8_t serif_style = pcltTable->SerifStyle & 0x3F; |
| 544 | if (2 <= serif_style && serif_style <= 6) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 545 | info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style; |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 546 | } else if (9 <= serif_style && serif_style <= 12) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 547 | info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style; |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 548 | } |
| 549 | } else if (((os2Table = (TT_OS2*)FT_Get_Sfnt_Table(face, ft_sfnt_os2)) != nullptr) && |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 550 | // sCapHeight is available only when version 2 or later. |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 551 | os2Table->version != 0xFFFF && |
| 552 | os2Table->version >= 2) |
| 553 | { |
| 554 | info->fCapHeight = os2Table->sCapHeight; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 555 | } else { |
| 556 | // Figure out a good guess for CapHeight: average the height of M and X. |
| 557 | FT_BBox m_bbox, x_bbox; |
| 558 | bool got_m, got_x; |
| 559 | got_m = GetLetterCBox(face, 'M', &m_bbox); |
| 560 | got_x = GetLetterCBox(face, 'X', &x_bbox); |
| 561 | if (got_m && got_x) { |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 562 | info->fCapHeight = ((m_bbox.yMax - m_bbox.yMin) + (x_bbox.yMax - x_bbox.yMin)) / 2; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 563 | } else if (got_m && !got_x) { |
| 564 | info->fCapHeight = m_bbox.yMax - m_bbox.yMin; |
| 565 | } else if (!got_m && got_x) { |
| 566 | info->fCapHeight = x_bbox.yMax - x_bbox.yMin; |
bungeman@google.com | 12bd4a0 | 2013-12-19 19:34:22 +0000 | [diff] [blame] | 567 | } else { |
| 568 | // Last resort, use the ascent. |
| 569 | info->fCapHeight = info->fAscent; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 570 | } |
| 571 | } |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 572 | |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 573 | info->fBBox = SkIRect::MakeLTRB(face->bbox.xMin, face->bbox.yMax, |
| 574 | face->bbox.xMax, face->bbox.yMin); |
| 575 | |
vandebo | 0f9bad0 | 2014-06-19 11:05:39 -0700 | [diff] [blame] | 576 | if (!FT_IS_SCALABLE(face)) { |
reed | 39a9a50 | 2015-05-12 09:50:04 -0700 | [diff] [blame] | 577 | perGlyphInfo = kNo_PerGlyphInfo; |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 578 | } |
| 579 | |
reed | 39a9a50 | 2015-05-12 09:50:04 -0700 | [diff] [blame] | 580 | if (perGlyphInfo & kHAdvance_PerGlyphInfo) { |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 581 | info->setGlyphWidths( |
| 582 | face->num_glyphs, |
| 583 | glyphIDs, |
| 584 | glyphIDsCount, |
| 585 | SkAdvancedTypefaceMetrics::GetAdvance([face](int gId, int16_t* data) { |
| 586 | FT_Fixed advance = 0; |
| 587 | if (FT_Get_Advances(face, gId, 1, FT_LOAD_NO_SCALE, &advance)) { |
| 588 | return false; |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 589 | } |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 590 | SkASSERT(data); |
| 591 | *data = advance; |
| 592 | return true; |
| 593 | }) |
| 594 | ); |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 595 | } |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 596 | |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 597 | if (perGlyphInfo & kVAdvance_PerGlyphInfo && FT_HAS_VERTICAL(face)) { |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 598 | SkASSERT(false); // Not implemented yet. |
| 599 | } |
| 600 | |
reed | 39a9a50 | 2015-05-12 09:50:04 -0700 | [diff] [blame] | 601 | if (perGlyphInfo & kGlyphNames_PerGlyphInfo && |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 602 | info->fType == SkAdvancedTypefaceMetrics::kType1_Font) |
| 603 | { |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 604 | // Postscript fonts may contain more than 255 glyphs, so we end up |
| 605 | // using multiple font descriptions with a glyph ordering. Record |
| 606 | // the name of each glyph. |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 607 | info->fGlyphNames.reset(new SkAutoTArray<SkString>(face->num_glyphs)); |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 608 | for (int gID = 0; gID < face->num_glyphs; gID++) { |
| 609 | char glyphName[128]; // PS limit for names is 127 bytes. |
| 610 | FT_Get_Glyph_Name(face, gID, glyphName, 128); |
| 611 | info->fGlyphNames->get()[gID].set(glyphName); |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 612 | } |
| 613 | } |
| 614 | |
reed | 39a9a50 | 2015-05-12 09:50:04 -0700 | [diff] [blame] | 615 | if (perGlyphInfo & kToUnicode_PerGlyphInfo && |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame^] | 616 | info->fType != SkAdvancedTypefaceMetrics::kType1_Font && |
| 617 | face->num_charmaps) |
| 618 | { |
vandebo@chromium.org | 6744d49 | 2011-05-09 18:13:47 +0000 | [diff] [blame] | 619 | populate_glyph_to_unicode(face, &(info->fGlyphToUnicode)); |
| 620 | } |
| 621 | |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 622 | return info; |
| 623 | } |
vandebo@chromium.org | 37ad8fb | 2011-08-18 02:38:50 +0000 | [diff] [blame] | 624 | |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 625 | /////////////////////////////////////////////////////////////////////////// |
| 626 | |
reed@google.com | 8ed436c | 2011-07-21 14:12:36 +0000 | [diff] [blame] | 627 | static bool bothZero(SkScalar a, SkScalar b) { |
| 628 | return 0 == a && 0 == b; |
| 629 | } |
| 630 | |
| 631 | // returns false if there is any non-90-rotation or skew |
| 632 | static bool isAxisAligned(const SkScalerContext::Rec& rec) { |
| 633 | return 0 == rec.fPreSkewX && |
| 634 | (bothZero(rec.fPost2x2[0][1], rec.fPost2x2[1][0]) || |
| 635 | bothZero(rec.fPost2x2[0][0], rec.fPost2x2[1][1])); |
| 636 | } |
| 637 | |
reed | a9322c2 | 2016-04-12 06:47:05 -0700 | [diff] [blame] | 638 | SkScalerContext* SkTypeface_FreeType::onCreateScalerContext(const SkScalerContextEffects& effects, |
| 639 | const SkDescriptor* desc) const { |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 640 | SkScalerContext_FreeType* c = |
reed | a9322c2 | 2016-04-12 06:47:05 -0700 | [diff] [blame] | 641 | new SkScalerContext_FreeType(const_cast<SkTypeface_FreeType*>(this), effects, desc); |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 642 | if (!c->success()) { |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 643 | delete c; |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 644 | c = nullptr; |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 645 | } |
| 646 | return c; |
| 647 | } |
| 648 | |
| 649 | void SkTypeface_FreeType::onFilterRec(SkScalerContextRec* rec) const { |
bungeman@google.com | 8cf3226 | 2012-04-02 14:34:30 +0000 | [diff] [blame] | 650 | //BOGUS: http://code.google.com/p/chromium/issues/detail?id=121119 |
| 651 | //Cap the requested size as larger sizes give bogus values. |
| 652 | //Remove when http://code.google.com/p/skia/issues/detail?id=554 is fixed. |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 653 | //Note that this also currently only protects against large text size requests, |
| 654 | //the total matrix is not taken into account here. |
bungeman@google.com | 5582e63 | 2012-04-02 14:51:54 +0000 | [diff] [blame] | 655 | if (rec->fTextSize > SkIntToScalar(1 << 14)) { |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 656 | rec->fTextSize = SkIntToScalar(1 << 14); |
bungeman@google.com | 8cf3226 | 2012-04-02 14:34:30 +0000 | [diff] [blame] | 657 | } |
skia.committer@gmail.com | a27096b | 2012-08-30 14:38:00 +0000 | [diff] [blame] | 658 | |
bungeman | ec7e12f | 2015-01-21 11:55:16 -0800 | [diff] [blame] | 659 | if (isLCD(*rec)) { |
bungeman | d4742fa | 2015-01-21 11:19:22 -0800 | [diff] [blame] | 660 | // TODO: re-work so that FreeType is set-up and selected by the SkFontMgr. |
| 661 | SkAutoMutexAcquire ama(gFTMutex); |
| 662 | ref_ft_library(); |
bungeman | ec7e12f | 2015-01-21 11:55:16 -0800 | [diff] [blame] | 663 | if (!gFTLibrary->isLCDSupported()) { |
bungeman | d4742fa | 2015-01-21 11:19:22 -0800 | [diff] [blame] | 664 | // If the runtime Freetype library doesn't support LCD, disable it here. |
| 665 | rec->fMaskFormat = SkMask::kA8_Format; |
| 666 | } |
| 667 | unref_ft_library(); |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 668 | } |
reed@google.com | 5b31b0f | 2011-02-23 14:41:42 +0000 | [diff] [blame] | 669 | |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 670 | SkPaint::Hinting h = rec->getHinting(); |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 671 | if (SkPaint::kFull_Hinting == h && !isLCD(*rec)) { |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 672 | // collapse full->normal hinting if we're not doing LCD |
| 673 | h = SkPaint::kNormal_Hinting; |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 674 | } |
bungeman@google.com | f4f2b80 | 2012-03-08 19:19:51 +0000 | [diff] [blame] | 675 | if ((rec->fFlags & SkScalerContext::kSubpixelPositioning_Flag)) { |
reed@google.com | 1ac8350 | 2012-02-28 17:06:02 +0000 | [diff] [blame] | 676 | if (SkPaint::kNo_Hinting != h) { |
| 677 | h = SkPaint::kSlight_Hinting; |
| 678 | } |
| 679 | } |
| 680 | |
reed@google.com | 8ed436c | 2011-07-21 14:12:36 +0000 | [diff] [blame] | 681 | // rotated text looks bad with hinting, so we disable it as needed |
| 682 | if (!isAxisAligned(*rec)) { |
| 683 | h = SkPaint::kNo_Hinting; |
| 684 | } |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 685 | rec->setHinting(h); |
reed@google.com | ffe49f5 | 2011-11-22 19:42:41 +0000 | [diff] [blame] | 686 | |
bungeman@google.com | 97efada | 2012-07-30 20:40:50 +0000 | [diff] [blame] | 687 | #ifndef SK_GAMMA_APPLY_TO_A8 |
| 688 | if (!isLCD(*rec)) { |
brianosman | a1e8f8d | 2016-04-08 06:47:54 -0700 | [diff] [blame] | 689 | // SRGBTODO: Is this correct? Do we want contrast boost? |
| 690 | rec->ignorePreBlend(); |
reed@google.com | ffe49f5 | 2011-11-22 19:42:41 +0000 | [diff] [blame] | 691 | } |
reed@google.com | 1ac8350 | 2012-02-28 17:06:02 +0000 | [diff] [blame] | 692 | #endif |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 693 | } |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 694 | |
reed@google.com | 38c37dd | 2013-03-21 15:36:26 +0000 | [diff] [blame] | 695 | int SkTypeface_FreeType::onGetUPEM() const { |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 696 | AutoFTAccess fta(this); |
| 697 | FT_Face face = fta.face(); |
| 698 | return face ? face->units_per_EM : 0; |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 699 | } |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 700 | |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 701 | bool SkTypeface_FreeType::onGetKerningPairAdjustments(const uint16_t glyphs[], |
| 702 | int count, int32_t adjustments[]) const { |
| 703 | AutoFTAccess fta(this); |
| 704 | FT_Face face = fta.face(); |
| 705 | if (!face || !FT_HAS_KERNING(face)) { |
| 706 | return false; |
| 707 | } |
| 708 | |
| 709 | for (int i = 0; i < count - 1; ++i) { |
| 710 | FT_Vector delta; |
| 711 | FT_Error err = FT_Get_Kerning(face, glyphs[i], glyphs[i+1], |
| 712 | FT_KERNING_UNSCALED, &delta); |
| 713 | if (err) { |
| 714 | return false; |
| 715 | } |
| 716 | adjustments[i] = delta.x; |
| 717 | } |
| 718 | return true; |
| 719 | } |
| 720 | |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 721 | /** Returns the bitmap strike equal to or just larger than the requested size. */ |
benjaminwagner | 4534562 | 2016-02-19 15:30:20 -0800 | [diff] [blame] | 722 | static FT_Int chooseBitmapStrike(FT_Face face, FT_F26Dot6 scaleY) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 723 | if (face == nullptr) { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 724 | SkDEBUGF(("chooseBitmapStrike aborted due to nullptr face.\n")); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 725 | return -1; |
| 726 | } |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 727 | |
| 728 | FT_Pos requestedPPEM = scaleY; // FT_Bitmap_Size::y_ppem is in 26.6 format. |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 729 | FT_Int chosenStrikeIndex = -1; |
| 730 | FT_Pos chosenPPEM = 0; |
| 731 | for (FT_Int strikeIndex = 0; strikeIndex < face->num_fixed_sizes; ++strikeIndex) { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 732 | FT_Pos strikePPEM = face->available_sizes[strikeIndex].y_ppem; |
| 733 | if (strikePPEM == requestedPPEM) { |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 734 | // exact match - our search stops here |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 735 | return strikeIndex; |
| 736 | } else if (chosenPPEM < requestedPPEM) { |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 737 | // attempt to increase chosenPPEM |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 738 | if (chosenPPEM < strikePPEM) { |
| 739 | chosenPPEM = strikePPEM; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 740 | chosenStrikeIndex = strikeIndex; |
| 741 | } |
| 742 | } else { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 743 | // attempt to decrease chosenPPEM, but not below requestedPPEM |
| 744 | if (requestedPPEM < strikePPEM && strikePPEM < chosenPPEM) { |
| 745 | chosenPPEM = strikePPEM; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 746 | chosenStrikeIndex = strikeIndex; |
| 747 | } |
| 748 | } |
| 749 | } |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 750 | return chosenStrikeIndex; |
| 751 | } |
| 752 | |
reed | a9322c2 | 2016-04-12 06:47:05 -0700 | [diff] [blame] | 753 | SkScalerContext_FreeType::SkScalerContext_FreeType(SkTypeface* typeface, |
| 754 | const SkScalerContextEffects& effects, |
| 755 | const SkDescriptor* desc) |
| 756 | : SkScalerContext_FreeType_Base(typeface, effects, desc) |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 757 | , fFace(nullptr) |
| 758 | , fFTSize(nullptr) |
| 759 | , fStrikeIndex(-1) |
bungeman | 13a007d | 2015-06-19 05:09:39 -0700 | [diff] [blame] | 760 | { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 761 | SkAutoMutexAcquire ac(gFTMutex); |
| 762 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 763 | if (!ref_ft_library()) { |
| 764 | sk_throw(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 765 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 766 | |
| 767 | // load the font file |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 768 | using UnrefFTFace = SkFunctionWrapper<void, skstd::remove_pointer_t<FT_Face>, unref_ft_face>; |
mtklein | 5f939ab | 2016-03-16 10:28:35 -0700 | [diff] [blame] | 769 | std::unique_ptr<skstd::remove_pointer_t<FT_Face>, UnrefFTFace> ftFace(ref_ft_face(typeface)); |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 770 | if (nullptr == ftFace) { |
| 771 | SkDEBUGF(("Could not create FT_Face.\n")); |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 772 | return; |
| 773 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 774 | |
bungeman | 5f14c5e | 2014-12-05 12:26:44 -0800 | [diff] [blame] | 775 | fRec.computeMatrices(SkScalerContextRec::kFull_PreMatrixScale, &fScale, &fMatrix22Scalar); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 776 | |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 777 | FT_F26Dot6 scaleX = SkScalarToFDot6(fScale.fX); |
| 778 | FT_F26Dot6 scaleY = SkScalarToFDot6(fScale.fY); |
bungeman@google.com | d3fbd34 | 2014-04-15 15:52:07 +0000 | [diff] [blame] | 779 | fMatrix22.xx = SkScalarToFixed(fMatrix22Scalar.getScaleX()); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 780 | fMatrix22.xy = SkScalarToFixed(-fMatrix22Scalar.getSkewX()); |
| 781 | fMatrix22.yx = SkScalarToFixed(-fMatrix22Scalar.getSkewY()); |
bungeman@google.com | d3fbd34 | 2014-04-15 15:52:07 +0000 | [diff] [blame] | 782 | fMatrix22.yy = SkScalarToFixed(fMatrix22Scalar.getScaleY()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 783 | |
reed@google.com | a1bfa21 | 2012-03-08 21:57:12 +0000 | [diff] [blame] | 784 | fLCDIsVert = SkToBool(fRec.fFlags & SkScalerContext::kLCD_Vertical_Flag); |
| 785 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 786 | // compute the flags we send to Load_Glyph |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 787 | bool linearMetrics = SkToBool(fRec.fFlags & SkScalerContext::kSubpixelPositioning_Flag); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 788 | { |
reed@android.com | e4d0bc0 | 2009-07-24 19:53:20 +0000 | [diff] [blame] | 789 | FT_Int32 loadFlags = FT_LOAD_DEFAULT; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 790 | |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 791 | if (SkMask::kBW_Format == fRec.fMaskFormat) { |
| 792 | // See http://code.google.com/p/chromium/issues/detail?id=43252#c24 |
| 793 | loadFlags = FT_LOAD_TARGET_MONO; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 794 | if (fRec.getHinting() == SkPaint::kNo_Hinting) { |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 795 | loadFlags = FT_LOAD_NO_HINTING; |
reed@google.com | bdc9988 | 2011-11-21 14:36:57 +0000 | [diff] [blame] | 796 | linearMetrics = true; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 797 | } |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 798 | } else { |
| 799 | switch (fRec.getHinting()) { |
| 800 | case SkPaint::kNo_Hinting: |
| 801 | loadFlags = FT_LOAD_NO_HINTING; |
reed@google.com | bdc9988 | 2011-11-21 14:36:57 +0000 | [diff] [blame] | 802 | linearMetrics = true; |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 803 | break; |
| 804 | case SkPaint::kSlight_Hinting: |
| 805 | loadFlags = FT_LOAD_TARGET_LIGHT; // This implies FORCE_AUTOHINT |
| 806 | break; |
| 807 | case SkPaint::kNormal_Hinting: |
bungeman@google.com | f6f5687 | 2014-01-23 19:01:36 +0000 | [diff] [blame] | 808 | if (fRec.fFlags & SkScalerContext::kForceAutohinting_Flag) { |
agl@chromium.org | a2c71cb | 2010-06-17 20:49:17 +0000 | [diff] [blame] | 809 | loadFlags = FT_LOAD_FORCE_AUTOHINT; |
djsollen | 858a789 | 2014-08-20 07:03:23 -0700 | [diff] [blame] | 810 | #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK |
| 811 | } else { |
| 812 | loadFlags = FT_LOAD_NO_AUTOHINT; |
| 813 | #endif |
bungeman@google.com | f6f5687 | 2014-01-23 19:01:36 +0000 | [diff] [blame] | 814 | } |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 815 | break; |
| 816 | case SkPaint::kFull_Hinting: |
bungeman@google.com | f6f5687 | 2014-01-23 19:01:36 +0000 | [diff] [blame] | 817 | if (fRec.fFlags & SkScalerContext::kForceAutohinting_Flag) { |
agl@chromium.org | a2c71cb | 2010-06-17 20:49:17 +0000 | [diff] [blame] | 818 | loadFlags = FT_LOAD_FORCE_AUTOHINT; |
| 819 | break; |
| 820 | } |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 821 | loadFlags = FT_LOAD_TARGET_NORMAL; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 822 | if (isLCD(fRec)) { |
reed@google.com | a1bfa21 | 2012-03-08 21:57:12 +0000 | [diff] [blame] | 823 | if (fLCDIsVert) { |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 824 | loadFlags = FT_LOAD_TARGET_LCD_V; |
| 825 | } else { |
| 826 | loadFlags = FT_LOAD_TARGET_LCD; |
| 827 | } |
reed@google.com | ea2333d | 2011-03-14 16:44:56 +0000 | [diff] [blame] | 828 | } |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 829 | break; |
| 830 | default: |
| 831 | SkDebugf("---------- UNKNOWN hinting %d\n", fRec.getHinting()); |
| 832 | break; |
| 833 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 834 | } |
| 835 | |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 836 | if ((fRec.fFlags & SkScalerContext::kEmbeddedBitmapText_Flag) == 0) { |
agl@chromium.org | e0d0899 | 2009-08-07 19:19:23 +0000 | [diff] [blame] | 837 | loadFlags |= FT_LOAD_NO_BITMAP; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 838 | } |
agl@chromium.org | e0d0899 | 2009-08-07 19:19:23 +0000 | [diff] [blame] | 839 | |
reed@google.com | 96a9f791 | 2011-05-06 11:49:30 +0000 | [diff] [blame] | 840 | // Always using FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH to get correct |
| 841 | // advances, as fontconfig and cairo do. |
| 842 | // See http://code.google.com/p/skia/issues/detail?id=222. |
| 843 | loadFlags |= FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH; |
| 844 | |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 845 | // Use vertical layout if requested. |
| 846 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 847 | loadFlags |= FT_LOAD_VERTICAL_LAYOUT; |
| 848 | } |
| 849 | |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 850 | loadFlags |= FT_LOAD_COLOR; |
| 851 | |
reed@android.com | e4d0bc0 | 2009-07-24 19:53:20 +0000 | [diff] [blame] | 852 | fLoadGlyphFlags = loadFlags; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 853 | } |
| 854 | |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 855 | using DoneFTSize = SkFunctionWrapper<FT_Error, skstd::remove_pointer_t<FT_Size>, FT_Done_Size>; |
mtklein | 5f939ab | 2016-03-16 10:28:35 -0700 | [diff] [blame] | 856 | std::unique_ptr<skstd::remove_pointer_t<FT_Size>, DoneFTSize> ftSize([&ftFace]() -> FT_Size { |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 857 | FT_Size size; |
| 858 | FT_Error err = FT_New_Size(ftFace.get(), &size); |
| 859 | if (err != 0) { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 860 | SkDEBUGF(("FT_New_Size(%s) returned 0x%x.\n", ftFace->family_name, err)); |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 861 | return nullptr; |
| 862 | } |
| 863 | return size; |
| 864 | }()); |
| 865 | if (nullptr == ftSize) { |
| 866 | SkDEBUGF(("Could not create FT_Size.\n")); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 867 | return; |
| 868 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 869 | |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 870 | FT_Error err = FT_Activate_Size(ftSize.get()); |
| 871 | if (err != 0) { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 872 | SkDEBUGF(("FT_Activate_Size(%s) returned 0x%x.\n", ftFace->family_name, err)); |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 873 | return; |
| 874 | } |
| 875 | |
| 876 | if (FT_IS_SCALABLE(ftFace)) { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 877 | err = FT_Set_Char_Size(ftFace.get(), scaleX, scaleY, 72, 72); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 878 | if (err != 0) { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 879 | SkDEBUGF(("FT_Set_CharSize(%s, %f, %f) returned 0x%x.\n", |
| 880 | ftFace->family_name, fScale.fX, fScale.fY, err)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 881 | return; |
| 882 | } |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 883 | } else if (FT_HAS_FIXED_SIZES(ftFace)) { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 884 | fStrikeIndex = chooseBitmapStrike(ftFace.get(), scaleY); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 885 | if (fStrikeIndex == -1) { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 886 | SkDEBUGF(("No glyphs for font \"%s\" size %f.\n", ftFace->family_name, fScale.fY)); |
| 887 | return; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 888 | } |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 889 | |
| 890 | err = FT_Select_Size(ftFace.get(), fStrikeIndex); |
| 891 | if (err != 0) { |
| 892 | SkDEBUGF(("FT_Select_Size(%s, %d) returned 0x%x.\n", |
| 893 | ftFace->family_name, fStrikeIndex, err)); |
| 894 | fStrikeIndex = -1; |
| 895 | return; |
| 896 | } |
| 897 | |
| 898 | // A non-ideal size was picked, so recompute the matrix. |
| 899 | // This adjusts for the difference between FT_Set_Char_Size and FT_Select_Size. |
| 900 | fMatrix22Scalar.preScale(fScale.x() / ftFace->size->metrics.x_ppem, |
| 901 | fScale.y() / ftFace->size->metrics.y_ppem); |
| 902 | fMatrix22.xx = SkScalarToFixed(fMatrix22Scalar.getScaleX()); |
| 903 | fMatrix22.xy = SkScalarToFixed(-fMatrix22Scalar.getSkewX()); |
| 904 | fMatrix22.yx = SkScalarToFixed(-fMatrix22Scalar.getSkewY()); |
| 905 | fMatrix22.yy = SkScalarToFixed(fMatrix22Scalar.getScaleY()); |
| 906 | |
| 907 | // FreeType does not provide linear metrics for bitmap fonts. |
| 908 | linearMetrics = false; |
| 909 | |
| 910 | // FreeType documentation says: |
| 911 | // FT_LOAD_NO_BITMAP -- Ignore bitmap strikes when loading. |
| 912 | // Bitmap-only fonts ignore this flag. |
| 913 | // |
| 914 | // However, in FreeType 2.5.1 color bitmap only fonts do not ignore this flag. |
| 915 | // Force this flag off for bitmap only fonts. |
| 916 | fLoadGlyphFlags &= ~FT_LOAD_NO_BITMAP; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 917 | } else { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 918 | SkDEBUGF(("Unknown kind of font \"%s\" size %f.\n", fFace->family_name, fScale.fY)); |
| 919 | return; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 920 | } |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 921 | |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 922 | fFTSize = ftSize.release(); |
| 923 | fFace = ftFace.release(); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 924 | fDoLinearMetrics = linearMetrics; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 925 | } |
| 926 | |
| 927 | SkScalerContext_FreeType::~SkScalerContext_FreeType() { |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 928 | SkAutoMutexAcquire ac(gFTMutex); |
| 929 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 930 | if (fFTSize != nullptr) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 931 | FT_Done_Size(fFTSize); |
| 932 | } |
| 933 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 934 | if (fFace != nullptr) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 935 | unref_ft_face(fFace); |
| 936 | } |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 937 | |
| 938 | unref_ft_library(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 939 | } |
| 940 | |
| 941 | /* We call this before each use of the fFace, since we may be sharing |
| 942 | this face with other context (at different sizes). |
| 943 | */ |
| 944 | FT_Error SkScalerContext_FreeType::setupSize() { |
bungeman | 3f846ae | 2015-11-03 11:07:20 -0800 | [diff] [blame] | 945 | gFTMutex.assertHeld(); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 946 | FT_Error err = FT_Activate_Size(fFTSize); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 947 | if (err != 0) { |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 948 | return err; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 949 | } |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 950 | FT_Set_Transform(fFace, &fMatrix22, nullptr); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 951 | return 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 952 | } |
| 953 | |
ctguil@chromium.org | 0bc7bf5 | 2011-03-04 19:04:57 +0000 | [diff] [blame] | 954 | unsigned SkScalerContext_FreeType::generateGlyphCount() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 955 | return fFace->num_glyphs; |
| 956 | } |
| 957 | |
| 958 | uint16_t SkScalerContext_FreeType::generateCharToGlyph(SkUnichar uni) { |
bungeman | 3f846ae | 2015-11-03 11:07:20 -0800 | [diff] [blame] | 959 | SkAutoMutexAcquire ac(gFTMutex); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 960 | return SkToU16(FT_Get_Char_Index( fFace, uni )); |
| 961 | } |
| 962 | |
reed@android.com | 9d3a985 | 2010-01-08 14:07:42 +0000 | [diff] [blame] | 963 | SkUnichar SkScalerContext_FreeType::generateGlyphToChar(uint16_t glyph) { |
bungeman | 3f846ae | 2015-11-03 11:07:20 -0800 | [diff] [blame] | 964 | SkAutoMutexAcquire ac(gFTMutex); |
reed@android.com | 9d3a985 | 2010-01-08 14:07:42 +0000 | [diff] [blame] | 965 | // iterate through each cmap entry, looking for matching glyph indices |
| 966 | FT_UInt glyphIndex; |
| 967 | SkUnichar charCode = FT_Get_First_Char( fFace, &glyphIndex ); |
| 968 | |
| 969 | while (glyphIndex != 0) { |
| 970 | if (glyphIndex == glyph) { |
| 971 | return charCode; |
| 972 | } |
| 973 | charCode = FT_Get_Next_Char( fFace, charCode, &glyphIndex ); |
| 974 | } |
| 975 | |
| 976 | return 0; |
| 977 | } |
| 978 | |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 979 | static SkScalar SkFT_FixedToScalar(FT_Fixed x) { |
| 980 | return SkFixedToScalar(x); |
| 981 | } |
| 982 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 983 | void SkScalerContext_FreeType::generateAdvance(SkGlyph* glyph) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 984 | /* unhinted and light hinted text have linearly scaled advances |
| 985 | * which are very cheap to compute with some font formats... |
| 986 | */ |
reed@google.com | bdc9988 | 2011-11-21 14:36:57 +0000 | [diff] [blame] | 987 | if (fDoLinearMetrics) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 988 | SkAutoMutexAcquire ac(gFTMutex); |
| 989 | |
| 990 | if (this->setupSize()) { |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 991 | glyph->zeroMetrics(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 992 | return; |
| 993 | } |
| 994 | |
| 995 | FT_Error error; |
| 996 | FT_Fixed advance; |
| 997 | |
djsollen | 1b27704 | 2014-08-06 06:58:06 -0700 | [diff] [blame] | 998 | error = FT_Get_Advance( fFace, glyph->getGlyphID(), |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 999 | fLoadGlyphFlags | FT_ADVANCE_FLAG_FAST_ONLY, |
| 1000 | &advance ); |
| 1001 | if (0 == error) { |
| 1002 | glyph->fRsbDelta = 0; |
| 1003 | glyph->fLsbDelta = 0; |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 1004 | const SkScalar advanceScalar = SkFT_FixedToScalar(advance); |
| 1005 | glyph->fAdvanceX = SkScalarToFloat(fMatrix22Scalar.getScaleX() * advanceScalar); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1006 | glyph->fAdvanceY = SkScalarToFloat(fMatrix22Scalar.getSkewY() * advanceScalar); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1007 | return; |
| 1008 | } |
| 1009 | } |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1010 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1011 | /* otherwise, we need to load/hint the glyph, which is slower */ |
| 1012 | this->generateMetrics(glyph); |
| 1013 | return; |
| 1014 | } |
| 1015 | |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1016 | void SkScalerContext_FreeType::getBBoxForCurrentGlyph(SkGlyph* glyph, |
| 1017 | FT_BBox* bbox, |
| 1018 | bool snapToPixelBoundary) { |
| 1019 | |
| 1020 | FT_Outline_Get_CBox(&fFace->glyph->outline, bbox); |
| 1021 | |
| 1022 | if (fRec.fFlags & SkScalerContext::kSubpixelPositioning_Flag) { |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 1023 | int dx = SkFixedToFDot6(glyph->getSubXFixed()); |
| 1024 | int dy = SkFixedToFDot6(glyph->getSubYFixed()); |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1025 | // negate dy since freetype-y-goes-up and skia-y-goes-down |
| 1026 | bbox->xMin += dx; |
| 1027 | bbox->yMin -= dy; |
| 1028 | bbox->xMax += dx; |
| 1029 | bbox->yMax -= dy; |
| 1030 | } |
| 1031 | |
| 1032 | // outset the box to integral boundaries |
| 1033 | if (snapToPixelBoundary) { |
| 1034 | bbox->xMin &= ~63; |
| 1035 | bbox->yMin &= ~63; |
| 1036 | bbox->xMax = (bbox->xMax + 63) & ~63; |
| 1037 | bbox->yMax = (bbox->yMax + 63) & ~63; |
| 1038 | } |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1039 | |
| 1040 | // Must come after snapToPixelBoundary so that the width and height are |
| 1041 | // consistent. Otherwise asserts will fire later on when generating the |
| 1042 | // glyph image. |
| 1043 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 1044 | FT_Vector vector; |
| 1045 | vector.x = fFace->glyph->metrics.vertBearingX - fFace->glyph->metrics.horiBearingX; |
| 1046 | vector.y = -fFace->glyph->metrics.vertBearingY - fFace->glyph->metrics.horiBearingY; |
| 1047 | FT_Vector_Transform(&vector, &fMatrix22); |
| 1048 | bbox->xMin += vector.x; |
| 1049 | bbox->xMax += vector.x; |
| 1050 | bbox->yMin += vector.y; |
| 1051 | bbox->yMax += vector.y; |
| 1052 | } |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1053 | } |
| 1054 | |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1055 | bool SkScalerContext_FreeType::getCBoxForLetter(char letter, FT_BBox* bbox) { |
| 1056 | const FT_UInt glyph_id = FT_Get_Char_Index(fFace, letter); |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1057 | if (!glyph_id) { |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1058 | return false; |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1059 | } |
| 1060 | if (FT_Load_Glyph(fFace, glyph_id, fLoadGlyphFlags) != 0) { |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1061 | return false; |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1062 | } |
commit-bot@chromium.org | 6fa81d7 | 2013-12-26 15:50:29 +0000 | [diff] [blame] | 1063 | emboldenIfNeeded(fFace, fFace->glyph); |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1064 | FT_Outline_Get_CBox(&fFace->glyph->outline, bbox); |
| 1065 | return true; |
| 1066 | } |
| 1067 | |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1068 | void SkScalerContext_FreeType::updateGlyphIfLCD(SkGlyph* glyph) { |
| 1069 | if (isLCD(fRec)) { |
| 1070 | if (fLCDIsVert) { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 1071 | glyph->fHeight += gFTLibrary->lcdExtra(); |
| 1072 | glyph->fTop -= gFTLibrary->lcdExtra() >> 1; |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1073 | } else { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 1074 | glyph->fWidth += gFTLibrary->lcdExtra(); |
| 1075 | glyph->fLeft -= gFTLibrary->lcdExtra() >> 1; |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1076 | } |
| 1077 | } |
| 1078 | } |
| 1079 | |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1080 | bool SkScalerContext_FreeType::shouldSubpixelBitmap(const SkGlyph& glyph, const SkMatrix& matrix) { |
| 1081 | // If subpixel rendering of a bitmap *can* be done. |
| 1082 | bool mechanism = fFace->glyph->format == FT_GLYPH_FORMAT_BITMAP && |
| 1083 | fRec.fFlags & SkScalerContext::kSubpixelPositioning_Flag && |
| 1084 | (glyph.getSubXFixed() || glyph.getSubYFixed()); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1085 | |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1086 | // If subpixel rendering of a bitmap *should* be done. |
| 1087 | // 1. If the face is not scalable then always allow subpixel rendering. |
| 1088 | // Otherwise, if the font has an 8ppem strike 7 will subpixel render but 8 won't. |
| 1089 | // 2. If the matrix is already not identity the bitmap will already be resampled, |
| 1090 | // so resampling slightly differently shouldn't make much difference. |
| 1091 | bool policy = !FT_IS_SCALABLE(fFace) || !matrix.isIdentity(); |
| 1092 | |
| 1093 | return mechanism && policy; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1094 | } |
| 1095 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1096 | void SkScalerContext_FreeType::generateMetrics(SkGlyph* glyph) { |
| 1097 | SkAutoMutexAcquire ac(gFTMutex); |
| 1098 | |
| 1099 | glyph->fRsbDelta = 0; |
| 1100 | glyph->fLsbDelta = 0; |
| 1101 | |
| 1102 | FT_Error err; |
| 1103 | |
| 1104 | if (this->setupSize()) { |
bungeman | 13a007d | 2015-06-19 05:09:39 -0700 | [diff] [blame] | 1105 | glyph->zeroMetrics(); |
| 1106 | return; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1107 | } |
| 1108 | |
djsollen | 1b27704 | 2014-08-06 06:58:06 -0700 | [diff] [blame] | 1109 | err = FT_Load_Glyph( fFace, glyph->getGlyphID(), fLoadGlyphFlags ); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1110 | if (err != 0) { |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 1111 | glyph->zeroMetrics(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1112 | return; |
| 1113 | } |
commit-bot@chromium.org | 6fa81d7 | 2013-12-26 15:50:29 +0000 | [diff] [blame] | 1114 | emboldenIfNeeded(fFace, fFace->glyph); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1115 | |
| 1116 | switch ( fFace->glyph->format ) { |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1117 | case FT_GLYPH_FORMAT_OUTLINE: |
bungeman@google.com | 0f0c288 | 2011-11-04 15:47:41 +0000 | [diff] [blame] | 1118 | if (0 == fFace->glyph->outline.n_contours) { |
| 1119 | glyph->fWidth = 0; |
| 1120 | glyph->fHeight = 0; |
| 1121 | glyph->fTop = 0; |
| 1122 | glyph->fLeft = 0; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1123 | } else { |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1124 | FT_BBox bbox; |
| 1125 | getBBoxForCurrentGlyph(glyph, &bbox, true); |
| 1126 | |
| 1127 | glyph->fWidth = SkToU16(SkFDot6Floor(bbox.xMax - bbox.xMin)); |
| 1128 | glyph->fHeight = SkToU16(SkFDot6Floor(bbox.yMax - bbox.yMin)); |
| 1129 | glyph->fTop = -SkToS16(SkFDot6Floor(bbox.yMax)); |
| 1130 | glyph->fLeft = SkToS16(SkFDot6Floor(bbox.xMin)); |
| 1131 | |
| 1132 | updateGlyphIfLCD(glyph); |
bungeman@google.com | 0f0c288 | 2011-11-04 15:47:41 +0000 | [diff] [blame] | 1133 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1134 | break; |
| 1135 | |
| 1136 | case FT_GLYPH_FORMAT_BITMAP: |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1137 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 1138 | FT_Vector vector; |
| 1139 | vector.x = fFace->glyph->metrics.vertBearingX - fFace->glyph->metrics.horiBearingX; |
| 1140 | vector.y = -fFace->glyph->metrics.vertBearingY - fFace->glyph->metrics.horiBearingY; |
| 1141 | FT_Vector_Transform(&vector, &fMatrix22); |
| 1142 | fFace->glyph->bitmap_left += SkFDot6Floor(vector.x); |
| 1143 | fFace->glyph->bitmap_top += SkFDot6Floor(vector.y); |
| 1144 | } |
| 1145 | |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1146 | if (fFace->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_BGRA) { |
| 1147 | glyph->fMaskFormat = SkMask::kARGB32_Format; |
| 1148 | } |
| 1149 | |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1150 | { |
| 1151 | SkRect rect = SkRect::MakeXYWH(SkIntToScalar(fFace->glyph->bitmap_left), |
| 1152 | -SkIntToScalar(fFace->glyph->bitmap_top), |
| 1153 | SkIntToScalar(fFace->glyph->bitmap.width), |
| 1154 | SkIntToScalar(fFace->glyph->bitmap.rows)); |
| 1155 | fMatrix22Scalar.mapRect(&rect); |
| 1156 | if (this->shouldSubpixelBitmap(*glyph, fMatrix22Scalar)) { |
| 1157 | rect.offset(SkFixedToScalar(glyph->getSubXFixed()), |
| 1158 | SkFixedToScalar(glyph->getSubYFixed())); |
| 1159 | } |
| 1160 | SkIRect irect = rect.roundOut(); |
| 1161 | glyph->fWidth = SkToU16(irect.width()); |
| 1162 | glyph->fHeight = SkToU16(irect.height()); |
| 1163 | glyph->fTop = SkToS16(irect.top()); |
| 1164 | glyph->fLeft = SkToS16(irect.left()); |
| 1165 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1166 | break; |
| 1167 | |
| 1168 | default: |
tomhudson@google.com | 0c00f21 | 2011-12-28 14:59:50 +0000 | [diff] [blame] | 1169 | SkDEBUGFAIL("unknown glyph format"); |
bungeman | 13a007d | 2015-06-19 05:09:39 -0700 | [diff] [blame] | 1170 | glyph->zeroMetrics(); |
| 1171 | return; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1172 | } |
| 1173 | |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1174 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 1175 | if (fDoLinearMetrics) { |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 1176 | const SkScalar advanceScalar = SkFT_FixedToScalar(fFace->glyph->linearVertAdvance); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1177 | glyph->fAdvanceX = SkScalarToFloat(fMatrix22Scalar.getSkewX() * advanceScalar); |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 1178 | glyph->fAdvanceY = SkScalarToFloat(fMatrix22Scalar.getScaleY() * advanceScalar); |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1179 | } else { |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 1180 | glyph->fAdvanceX = -SkFDot6ToFloat(fFace->glyph->advance.x); |
| 1181 | glyph->fAdvanceY = SkFDot6ToFloat(fFace->glyph->advance.y); |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1182 | } |
bungeman@google.com | 34f1026 | 2012-03-23 18:11:47 +0000 | [diff] [blame] | 1183 | } else { |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1184 | if (fDoLinearMetrics) { |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 1185 | const SkScalar advanceScalar = SkFT_FixedToScalar(fFace->glyph->linearHoriAdvance); |
| 1186 | glyph->fAdvanceX = SkScalarToFloat(fMatrix22Scalar.getScaleX() * advanceScalar); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1187 | glyph->fAdvanceY = SkScalarToFloat(fMatrix22Scalar.getSkewY() * advanceScalar); |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1188 | } else { |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 1189 | glyph->fAdvanceX = SkFDot6ToFloat(fFace->glyph->advance.x); |
| 1190 | glyph->fAdvanceY = -SkFDot6ToFloat(fFace->glyph->advance.y); |
bungeman@google.com | 34f1026 | 2012-03-23 18:11:47 +0000 | [diff] [blame] | 1191 | |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1192 | if (fRec.fFlags & kDevKernText_Flag) { |
| 1193 | glyph->fRsbDelta = SkToS8(fFace->glyph->rsb_delta); |
| 1194 | glyph->fLsbDelta = SkToS8(fFace->glyph->lsb_delta); |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1195 | } |
| 1196 | } |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1197 | } |
| 1198 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1199 | #ifdef ENABLE_GLYPH_SPEW |
djsollen | 1b27704 | 2014-08-06 06:58:06 -0700 | [diff] [blame] | 1200 | SkDEBUGF(("Metrics(glyph:%d flags:0x%x) w:%d\n", glyph->getGlyphID(), fLoadGlyphFlags, glyph->fWidth)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1201 | #endif |
| 1202 | } |
| 1203 | |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1204 | static void clear_glyph_image(const SkGlyph& glyph) { |
| 1205 | sk_bzero(glyph.fImage, glyph.rowBytes() * glyph.fHeight); |
| 1206 | } |
reed@google.com | ea2333d | 2011-03-14 16:44:56 +0000 | [diff] [blame] | 1207 | |
bungeman@google.com | a76de72 | 2012-10-26 19:35:54 +0000 | [diff] [blame] | 1208 | void SkScalerContext_FreeType::generateImage(const SkGlyph& glyph) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1209 | SkAutoMutexAcquire ac(gFTMutex); |
| 1210 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1211 | if (this->setupSize()) { |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1212 | clear_glyph_image(glyph); |
| 1213 | return; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1214 | } |
| 1215 | |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1216 | FT_Error err = FT_Load_Glyph(fFace, glyph.getGlyphID(), fLoadGlyphFlags); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1217 | if (err != 0) { |
| 1218 | SkDEBUGF(("SkScalerContext_FreeType::generateImage: FT_Load_Glyph(glyph:%d width:%d height:%d rb:%d flags:%d) returned 0x%x\n", |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1219 | glyph.getGlyphID(), glyph.fWidth, glyph.fHeight, glyph.rowBytes(), fLoadGlyphFlags, err)); |
| 1220 | clear_glyph_image(glyph); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1221 | return; |
| 1222 | } |
| 1223 | |
commit-bot@chromium.org | 6fa81d7 | 2013-12-26 15:50:29 +0000 | [diff] [blame] | 1224 | emboldenIfNeeded(fFace, fFace->glyph); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1225 | SkMatrix* bitmapMatrix = &fMatrix22Scalar; |
| 1226 | SkMatrix subpixelBitmapMatrix; |
| 1227 | if (this->shouldSubpixelBitmap(glyph, *bitmapMatrix)) { |
| 1228 | subpixelBitmapMatrix = fMatrix22Scalar; |
| 1229 | subpixelBitmapMatrix.postTranslate(SkFixedToScalar(glyph.getSubXFixed()), |
| 1230 | SkFixedToScalar(glyph.getSubYFixed())); |
| 1231 | bitmapMatrix = &subpixelBitmapMatrix; |
| 1232 | } |
| 1233 | generateGlyphImage(fFace, glyph, *bitmapMatrix); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1234 | } |
| 1235 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1236 | |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1237 | void SkScalerContext_FreeType::generatePath(const SkGlyph& glyph, SkPath* path) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1238 | SkAutoMutexAcquire ac(gFTMutex); |
| 1239 | |
caryclark | a10742c | 2014-09-18 11:00:40 -0700 | [diff] [blame] | 1240 | SkASSERT(path); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1241 | |
| 1242 | if (this->setupSize()) { |
| 1243 | path->reset(); |
| 1244 | return; |
| 1245 | } |
| 1246 | |
| 1247 | uint32_t flags = fLoadGlyphFlags; |
| 1248 | flags |= FT_LOAD_NO_BITMAP; // ignore embedded bitmaps so we're sure to get the outline |
| 1249 | flags &= ~FT_LOAD_RENDER; // don't scan convert (we just want the outline) |
| 1250 | |
djsollen | 1b27704 | 2014-08-06 06:58:06 -0700 | [diff] [blame] | 1251 | FT_Error err = FT_Load_Glyph( fFace, glyph.getGlyphID(), flags); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1252 | |
| 1253 | if (err != 0) { |
| 1254 | SkDEBUGF(("SkScalerContext_FreeType::generatePath: FT_Load_Glyph(glyph:%d flags:%d) returned 0x%x\n", |
djsollen | 1b27704 | 2014-08-06 06:58:06 -0700 | [diff] [blame] | 1255 | glyph.getGlyphID(), flags, err)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1256 | path->reset(); |
| 1257 | return; |
| 1258 | } |
commit-bot@chromium.org | 6fa81d7 | 2013-12-26 15:50:29 +0000 | [diff] [blame] | 1259 | emboldenIfNeeded(fFace, fFace->glyph); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1260 | |
sugoi@google.com | 66a58ac | 2013-03-05 20:40:52 +0000 | [diff] [blame] | 1261 | generateGlyphPath(fFace, path); |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1262 | |
| 1263 | // The path's origin from FreeType is always the horizontal layout origin. |
| 1264 | // Offset the path so that it is relative to the vertical origin if needed. |
| 1265 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 1266 | FT_Vector vector; |
| 1267 | vector.x = fFace->glyph->metrics.vertBearingX - fFace->glyph->metrics.horiBearingX; |
| 1268 | vector.y = -fFace->glyph->metrics.vertBearingY - fFace->glyph->metrics.horiBearingY; |
| 1269 | FT_Vector_Transform(&vector, &fMatrix22); |
| 1270 | path->offset(SkFDot6ToScalar(vector.x), -SkFDot6ToScalar(vector.y)); |
| 1271 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1272 | } |
| 1273 | |
bungeman | 4107806 | 2014-07-07 08:16:37 -0700 | [diff] [blame] | 1274 | void SkScalerContext_FreeType::generateFontMetrics(SkPaint::FontMetrics* metrics) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1275 | if (nullptr == metrics) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1276 | return; |
| 1277 | } |
| 1278 | |
bungeman | 4107806 | 2014-07-07 08:16:37 -0700 | [diff] [blame] | 1279 | SkAutoMutexAcquire ac(gFTMutex); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1280 | |
| 1281 | if (this->setupSize()) { |
bungeman | 4107806 | 2014-07-07 08:16:37 -0700 | [diff] [blame] | 1282 | sk_bzero(metrics, sizeof(*metrics)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1283 | return; |
| 1284 | } |
| 1285 | |
reed@android.com | a8a8b8b | 2009-05-04 15:00:11 +0000 | [diff] [blame] | 1286 | FT_Face face = fFace; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1287 | |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1288 | // fetch units/EM from "head" table if needed (ie for bitmap fonts) |
| 1289 | SkScalar upem = SkIntToScalar(face->units_per_EM); |
| 1290 | if (!upem) { |
| 1291 | TT_Header* ttHeader = (TT_Header*)FT_Get_Sfnt_Table(face, ft_sfnt_head); |
| 1292 | if (ttHeader) { |
| 1293 | upem = SkIntToScalar(ttHeader->Units_Per_EM); |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 1294 | } |
| 1295 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1296 | |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1297 | // use the os/2 table as a source of reasonable defaults. |
| 1298 | SkScalar x_height = 0.0f; |
| 1299 | SkScalar avgCharWidth = 0.0f; |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1300 | SkScalar cap_height = 0.0f; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1301 | TT_OS2* os2 = (TT_OS2*) FT_Get_Sfnt_Table(face, ft_sfnt_os2); |
| 1302 | if (os2) { |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1303 | x_height = SkIntToScalar(os2->sxHeight) / upem * fScale.y(); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1304 | avgCharWidth = SkIntToScalar(os2->xAvgCharWidth) / upem; |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1305 | if (os2->version != 0xFFFF && os2->version >= 2) { |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1306 | cap_height = SkIntToScalar(os2->sCapHeight) / upem * fScale.y(); |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1307 | } |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1308 | } |
| 1309 | |
| 1310 | // pull from format-specific metrics as needed |
| 1311 | SkScalar ascent, descent, leading, xmin, xmax, ymin, ymax; |
commit-bot@chromium.org | 0bc406d | 2014-03-01 20:12:26 +0000 | [diff] [blame] | 1312 | SkScalar underlineThickness, underlinePosition; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1313 | if (face->face_flags & FT_FACE_FLAG_SCALABLE) { // scalable outline font |
bungeman | 665b038 | 2015-03-19 10:43:57 -0700 | [diff] [blame] | 1314 | // FreeType will always use HHEA metrics if they're not zero. |
| 1315 | // It completely ignores the OS/2 fsSelection::UseTypoMetrics bit. |
| 1316 | // It also ignores the VDMX tables, which are also of interest here |
| 1317 | // (and override everything else when they apply). |
| 1318 | static const int kUseTypoMetricsMask = (1 << 7); |
| 1319 | if (os2 && os2->version != 0xFFFF && (os2->fsSelection & kUseTypoMetricsMask)) { |
| 1320 | ascent = -SkIntToScalar(os2->sTypoAscender) / upem; |
| 1321 | descent = -SkIntToScalar(os2->sTypoDescender) / upem; |
| 1322 | leading = SkIntToScalar(os2->sTypoLineGap) / upem; |
| 1323 | } else { |
| 1324 | ascent = -SkIntToScalar(face->ascender) / upem; |
| 1325 | descent = -SkIntToScalar(face->descender) / upem; |
| 1326 | leading = SkIntToScalar(face->height + (face->descender - face->ascender)) / upem; |
| 1327 | } |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1328 | xmin = SkIntToScalar(face->bbox.xMin) / upem; |
| 1329 | xmax = SkIntToScalar(face->bbox.xMax) / upem; |
| 1330 | ymin = -SkIntToScalar(face->bbox.yMin) / upem; |
| 1331 | ymax = -SkIntToScalar(face->bbox.yMax) / upem; |
commit-bot@chromium.org | 0bc406d | 2014-03-01 20:12:26 +0000 | [diff] [blame] | 1332 | underlineThickness = SkIntToScalar(face->underline_thickness) / upem; |
commit-bot@chromium.org | d3031aa | 2014-05-14 14:54:51 +0000 | [diff] [blame] | 1333 | underlinePosition = -SkIntToScalar(face->underline_position + |
| 1334 | face->underline_thickness / 2) / upem; |
commit-bot@chromium.org | 0bc406d | 2014-03-01 20:12:26 +0000 | [diff] [blame] | 1335 | |
bungeman | 4107806 | 2014-07-07 08:16:37 -0700 | [diff] [blame] | 1336 | metrics->fFlags |= SkPaint::FontMetrics::kUnderlineThinknessIsValid_Flag; |
| 1337 | metrics->fFlags |= SkPaint::FontMetrics::kUnderlinePositionIsValid_Flag; |
| 1338 | |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1339 | // we may be able to synthesize x_height and cap_height from outline |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1340 | if (!x_height) { |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1341 | FT_BBox bbox; |
| 1342 | if (getCBoxForLetter('x', &bbox)) { |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1343 | x_height = SkIntToScalar(bbox.yMax) / 64.0f; |
| 1344 | } |
| 1345 | } |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1346 | if (!cap_height) { |
| 1347 | FT_BBox bbox; |
| 1348 | if (getCBoxForLetter('H', &bbox)) { |
| 1349 | cap_height = SkIntToScalar(bbox.yMax) / 64.0f; |
| 1350 | } |
| 1351 | } |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1352 | } else if (fStrikeIndex != -1) { // bitmap strike metrics |
| 1353 | SkScalar xppem = SkIntToScalar(face->size->metrics.x_ppem); |
| 1354 | SkScalar yppem = SkIntToScalar(face->size->metrics.y_ppem); |
| 1355 | ascent = -SkIntToScalar(face->size->metrics.ascender) / (yppem * 64.0f); |
| 1356 | descent = -SkIntToScalar(face->size->metrics.descender) / (yppem * 64.0f); |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1357 | leading = (SkIntToScalar(face->size->metrics.height) / (yppem * 64.0f)) + ascent - descent; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1358 | xmin = 0.0f; |
| 1359 | xmax = SkIntToScalar(face->available_sizes[fStrikeIndex].width) / xppem; |
| 1360 | ymin = descent + leading; |
| 1361 | ymax = ascent - descent; |
commit-bot@chromium.org | 0bc406d | 2014-03-01 20:12:26 +0000 | [diff] [blame] | 1362 | underlineThickness = 0; |
| 1363 | underlinePosition = 0; |
| 1364 | |
bungeman | 4107806 | 2014-07-07 08:16:37 -0700 | [diff] [blame] | 1365 | metrics->fFlags &= ~SkPaint::FontMetrics::kUnderlineThinknessIsValid_Flag; |
| 1366 | metrics->fFlags &= ~SkPaint::FontMetrics::kUnderlinePositionIsValid_Flag; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1367 | } else { |
caryclark | fe7ada7 | 2016-03-21 06:55:52 -0700 | [diff] [blame] | 1368 | sk_bzero(metrics, sizeof(*metrics)); |
| 1369 | return; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1370 | } |
| 1371 | |
| 1372 | // synthesize elements that were not provided by the os/2 table or format-specific metrics |
| 1373 | if (!x_height) { |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1374 | x_height = -ascent * fScale.y(); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1375 | } |
| 1376 | if (!avgCharWidth) { |
| 1377 | avgCharWidth = xmax - xmin; |
| 1378 | } |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1379 | if (!cap_height) { |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1380 | cap_height = -ascent * fScale.y(); |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1381 | } |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1382 | |
| 1383 | // disallow negative linespacing |
| 1384 | if (leading < 0.0f) { |
| 1385 | leading = 0.0f; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1386 | } |
| 1387 | |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1388 | metrics->fTop = ymax * fScale.y(); |
| 1389 | metrics->fAscent = ascent * fScale.y(); |
| 1390 | metrics->fDescent = descent * fScale.y(); |
| 1391 | metrics->fBottom = ymin * fScale.y(); |
| 1392 | metrics->fLeading = leading * fScale.y(); |
| 1393 | metrics->fAvgCharWidth = avgCharWidth * fScale.y(); |
| 1394 | metrics->fXMin = xmin * fScale.y(); |
| 1395 | metrics->fXMax = xmax * fScale.y(); |
bungeman | 7316b10 | 2014-10-29 12:46:52 -0700 | [diff] [blame] | 1396 | metrics->fXHeight = x_height; |
| 1397 | metrics->fCapHeight = cap_height; |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1398 | metrics->fUnderlineThickness = underlineThickness * fScale.y(); |
| 1399 | metrics->fUnderlinePosition = underlinePosition * fScale.y(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1400 | } |
| 1401 | |
djsollen | fcfea99 | 2015-01-09 08:18:13 -0800 | [diff] [blame] | 1402 | /////////////////////////////////////////////////////////////////////////////// |
| 1403 | |
| 1404 | // hand-tuned value to reduce outline embolden strength |
| 1405 | #ifndef SK_OUTLINE_EMBOLDEN_DIVISOR |
| 1406 | #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK |
| 1407 | #define SK_OUTLINE_EMBOLDEN_DIVISOR 34 |
| 1408 | #else |
| 1409 | #define SK_OUTLINE_EMBOLDEN_DIVISOR 24 |
| 1410 | #endif |
| 1411 | #endif |
| 1412 | |
| 1413 | /////////////////////////////////////////////////////////////////////////////// |
| 1414 | |
commit-bot@chromium.org | 6fa81d7 | 2013-12-26 15:50:29 +0000 | [diff] [blame] | 1415 | void SkScalerContext_FreeType::emboldenIfNeeded(FT_Face face, FT_GlyphSlot glyph) |
| 1416 | { |
commit-bot@chromium.org | 921d2b3 | 2014-04-01 19:03:07 +0000 | [diff] [blame] | 1417 | // check to see if the embolden bit is set |
| 1418 | if (0 == (fRec.fFlags & SkScalerContext::kEmbolden_Flag)) { |
| 1419 | return; |
| 1420 | } |
| 1421 | |
commit-bot@chromium.org | 921d2b3 | 2014-04-01 19:03:07 +0000 | [diff] [blame] | 1422 | switch (glyph->format) { |
| 1423 | case FT_GLYPH_FORMAT_OUTLINE: |
| 1424 | FT_Pos strength; |
djsollen | fcfea99 | 2015-01-09 08:18:13 -0800 | [diff] [blame] | 1425 | strength = FT_MulFix(face->units_per_EM, face->size->metrics.y_scale) |
| 1426 | / SK_OUTLINE_EMBOLDEN_DIVISOR; |
commit-bot@chromium.org | 921d2b3 | 2014-04-01 19:03:07 +0000 | [diff] [blame] | 1427 | FT_Outline_Embolden(&glyph->outline, strength); |
| 1428 | break; |
| 1429 | case FT_GLYPH_FORMAT_BITMAP: |
| 1430 | FT_GlyphSlot_Own_Bitmap(glyph); |
| 1431 | FT_Bitmap_Embolden(glyph->library, &glyph->bitmap, kBitmapEmboldenStrength, 0); |
| 1432 | break; |
| 1433 | default: |
| 1434 | SkDEBUGFAIL("unknown glyph format"); |
commit-bot@chromium.org | 6fa81d7 | 2013-12-26 15:50:29 +0000 | [diff] [blame] | 1435 | } |
| 1436 | } |
| 1437 | |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 1438 | /////////////////////////////////////////////////////////////////////////////// |
| 1439 | |
| 1440 | #include "SkUtils.h" |
| 1441 | |
| 1442 | static SkUnichar next_utf8(const void** chars) { |
| 1443 | return SkUTF8_NextUnichar((const char**)chars); |
| 1444 | } |
| 1445 | |
| 1446 | static SkUnichar next_utf16(const void** chars) { |
| 1447 | return SkUTF16_NextUnichar((const uint16_t**)chars); |
| 1448 | } |
| 1449 | |
| 1450 | static SkUnichar next_utf32(const void** chars) { |
| 1451 | const SkUnichar** uniChars = (const SkUnichar**)chars; |
| 1452 | SkUnichar uni = **uniChars; |
| 1453 | *uniChars += 1; |
| 1454 | return uni; |
| 1455 | } |
| 1456 | |
| 1457 | typedef SkUnichar (*EncodingProc)(const void**); |
| 1458 | |
| 1459 | static EncodingProc find_encoding_proc(SkTypeface::Encoding enc) { |
| 1460 | static const EncodingProc gProcs[] = { |
| 1461 | next_utf8, next_utf16, next_utf32 |
| 1462 | }; |
| 1463 | SkASSERT((size_t)enc < SK_ARRAY_COUNT(gProcs)); |
| 1464 | return gProcs[enc]; |
| 1465 | } |
| 1466 | |
| 1467 | int SkTypeface_FreeType::onCharsToGlyphs(const void* chars, Encoding encoding, |
bungeman | 726cf90 | 2015-06-05 13:38:12 -0700 | [diff] [blame] | 1468 | uint16_t glyphs[], int glyphCount) const |
| 1469 | { |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 1470 | AutoFTAccess fta(this); |
| 1471 | FT_Face face = fta.face(); |
| 1472 | if (!face) { |
| 1473 | if (glyphs) { |
| 1474 | sk_bzero(glyphs, glyphCount * sizeof(glyphs[0])); |
| 1475 | } |
| 1476 | return 0; |
| 1477 | } |
| 1478 | |
| 1479 | EncodingProc next_uni_proc = find_encoding_proc(encoding); |
| 1480 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1481 | if (nullptr == glyphs) { |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 1482 | for (int i = 0; i < glyphCount; ++i) { |
| 1483 | if (0 == FT_Get_Char_Index(face, next_uni_proc(&chars))) { |
| 1484 | return i; |
| 1485 | } |
| 1486 | } |
| 1487 | return glyphCount; |
| 1488 | } else { |
| 1489 | int first = glyphCount; |
| 1490 | for (int i = 0; i < glyphCount; ++i) { |
| 1491 | unsigned id = FT_Get_Char_Index(face, next_uni_proc(&chars)); |
| 1492 | glyphs[i] = SkToU16(id); |
| 1493 | if (0 == id && i < first) { |
| 1494 | first = i; |
| 1495 | } |
| 1496 | } |
| 1497 | return first; |
| 1498 | } |
| 1499 | } |
| 1500 | |
| 1501 | int SkTypeface_FreeType::onCountGlyphs() const { |
bungeman | 572f879 | 2016-04-29 15:05:02 -0700 | [diff] [blame] | 1502 | AutoFTAccess fta(this); |
| 1503 | FT_Face face = fta.face(); |
| 1504 | return face ? face->num_glyphs : 0; |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 1505 | } |
| 1506 | |
bungeman@google.com | 839702b | 2013-08-07 17:09:22 +0000 | [diff] [blame] | 1507 | SkTypeface::LocalizedStrings* SkTypeface_FreeType::onCreateFamilyNameIterator() const { |
bungeman@google.com | a980269 | 2013-08-07 02:45:25 +0000 | [diff] [blame] | 1508 | SkTypeface::LocalizedStrings* nameIter = |
| 1509 | SkOTUtils::LocalizedStrings_NameTable::CreateForFamilyNames(*this); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1510 | if (nullptr == nameIter) { |
bungeman@google.com | a980269 | 2013-08-07 02:45:25 +0000 | [diff] [blame] | 1511 | SkString familyName; |
| 1512 | this->getFamilyName(&familyName); |
| 1513 | SkString language("und"); //undetermined |
| 1514 | nameIter = new SkOTUtils::LocalizedStrings_SingleName(familyName, language); |
| 1515 | } |
| 1516 | return nameIter; |
| 1517 | } |
| 1518 | |
bungeman@google.com | ddc218e | 2013-08-01 22:29:43 +0000 | [diff] [blame] | 1519 | int SkTypeface_FreeType::onGetTableTags(SkFontTableTag tags[]) const { |
| 1520 | AutoFTAccess fta(this); |
| 1521 | FT_Face face = fta.face(); |
| 1522 | |
| 1523 | FT_ULong tableCount = 0; |
| 1524 | FT_Error error; |
| 1525 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1526 | // When 'tag' is nullptr, returns number of tables in 'length'. |
| 1527 | error = FT_Sfnt_Table_Info(face, 0, nullptr, &tableCount); |
bungeman@google.com | ddc218e | 2013-08-01 22:29:43 +0000 | [diff] [blame] | 1528 | if (error) { |
| 1529 | return 0; |
| 1530 | } |
| 1531 | |
| 1532 | if (tags) { |
| 1533 | for (FT_ULong tableIndex = 0; tableIndex < tableCount; ++tableIndex) { |
| 1534 | FT_ULong tableTag; |
| 1535 | FT_ULong tablelength; |
| 1536 | error = FT_Sfnt_Table_Info(face, tableIndex, &tableTag, &tablelength); |
| 1537 | if (error) { |
| 1538 | return 0; |
| 1539 | } |
| 1540 | tags[tableIndex] = static_cast<SkFontTableTag>(tableTag); |
| 1541 | } |
| 1542 | } |
| 1543 | return tableCount; |
| 1544 | } |
| 1545 | |
| 1546 | size_t SkTypeface_FreeType::onGetTableData(SkFontTableTag tag, size_t offset, |
| 1547 | size_t length, void* data) const |
| 1548 | { |
| 1549 | AutoFTAccess fta(this); |
| 1550 | FT_Face face = fta.face(); |
| 1551 | |
| 1552 | FT_ULong tableLength = 0; |
| 1553 | FT_Error error; |
| 1554 | |
| 1555 | // When 'length' is 0 it is overwritten with the full table length; 'offset' is ignored. |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1556 | error = FT_Load_Sfnt_Table(face, tag, 0, nullptr, &tableLength); |
bungeman@google.com | ddc218e | 2013-08-01 22:29:43 +0000 | [diff] [blame] | 1557 | if (error) { |
| 1558 | return 0; |
| 1559 | } |
| 1560 | |
| 1561 | if (offset > tableLength) { |
| 1562 | return 0; |
| 1563 | } |
bungeman@google.com | 5ecd4fa | 2013-08-01 22:48:21 +0000 | [diff] [blame] | 1564 | FT_ULong size = SkTMin((FT_ULong)length, tableLength - (FT_ULong)offset); |
bsalomon | 49f085d | 2014-09-05 13:34:00 -0700 | [diff] [blame] | 1565 | if (data) { |
bungeman@google.com | ddc218e | 2013-08-01 22:29:43 +0000 | [diff] [blame] | 1566 | error = FT_Load_Sfnt_Table(face, tag, offset, reinterpret_cast<FT_Byte*>(data), &size); |
| 1567 | if (error) { |
| 1568 | return 0; |
| 1569 | } |
| 1570 | } |
| 1571 | |
| 1572 | return size; |
| 1573 | } |
| 1574 | |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 1575 | /////////////////////////////////////////////////////////////////////////////// |
| 1576 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1577 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1578 | SkTypeface_FreeType::Scanner::Scanner() : fLibrary(nullptr) { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 1579 | if (FT_New_Library(&gFTMemory, &fLibrary)) { |
| 1580 | return; |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1581 | } |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 1582 | FT_Add_Default_Modules(fLibrary); |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1583 | } |
| 1584 | SkTypeface_FreeType::Scanner::~Scanner() { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 1585 | if (fLibrary) { |
| 1586 | FT_Done_Library(fLibrary); |
| 1587 | } |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1588 | } |
| 1589 | |
| 1590 | FT_Face SkTypeface_FreeType::Scanner::openFace(SkStream* stream, int ttcIndex, |
| 1591 | FT_Stream ftStream) const |
bungeman | 32501a1 | 2014-10-28 12:03:55 -0700 | [diff] [blame] | 1592 | { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1593 | if (fLibrary == nullptr) { |
| 1594 | return nullptr; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1595 | } |
| 1596 | |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1597 | FT_Open_Args args; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1598 | memset(&args, 0, sizeof(args)); |
| 1599 | |
| 1600 | const void* memoryBase = stream->getMemoryBase(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1601 | |
bsalomon | 49f085d | 2014-09-05 13:34:00 -0700 | [diff] [blame] | 1602 | if (memoryBase) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1603 | args.flags = FT_OPEN_MEMORY; |
| 1604 | args.memory_base = (const FT_Byte*)memoryBase; |
| 1605 | args.memory_size = stream->getLength(); |
| 1606 | } else { |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1607 | memset(ftStream, 0, sizeof(*ftStream)); |
| 1608 | ftStream->size = stream->getLength(); |
| 1609 | ftStream->descriptor.pointer = stream; |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 1610 | ftStream->read = sk_ft_stream_io; |
| 1611 | ftStream->close = sk_ft_stream_close; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1612 | |
| 1613 | args.flags = FT_OPEN_STREAM; |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1614 | args.stream = ftStream; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1615 | } |
| 1616 | |
| 1617 | FT_Face face; |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1618 | if (FT_Open_Face(fLibrary, &args, ttcIndex, &face)) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1619 | return nullptr; |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1620 | } |
| 1621 | return face; |
| 1622 | } |
| 1623 | |
| 1624 | bool SkTypeface_FreeType::Scanner::recognizedFont(SkStream* stream, int* numFaces) const { |
| 1625 | SkAutoMutexAcquire libraryLock(fLibraryMutex); |
| 1626 | |
| 1627 | FT_StreamRec streamRec; |
| 1628 | FT_Face face = this->openFace(stream, -1, &streamRec); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1629 | if (nullptr == face) { |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1630 | return false; |
| 1631 | } |
| 1632 | |
| 1633 | *numFaces = face->num_faces; |
| 1634 | |
| 1635 | FT_Done_Face(face); |
| 1636 | return true; |
| 1637 | } |
| 1638 | |
| 1639 | #include "SkTSearch.h" |
| 1640 | bool SkTypeface_FreeType::Scanner::scanFont( |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 1641 | SkStream* stream, int ttcIndex, |
| 1642 | SkString* name, SkFontStyle* style, bool* isFixedPitch, AxisDefinitions* axes) const |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1643 | { |
| 1644 | SkAutoMutexAcquire libraryLock(fLibraryMutex); |
| 1645 | |
| 1646 | FT_StreamRec streamRec; |
| 1647 | FT_Face face = this->openFace(stream, ttcIndex, &streamRec); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1648 | if (nullptr == face) { |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1649 | return false; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1650 | } |
| 1651 | |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1652 | int weight = SkFontStyle::kNormal_Weight; |
| 1653 | int width = SkFontStyle::kNormal_Width; |
| 1654 | SkFontStyle::Slant slant = SkFontStyle::kUpright_Slant; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1655 | if (face->style_flags & FT_STYLE_FLAG_BOLD) { |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1656 | weight = SkFontStyle::kBold_Weight; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1657 | } |
| 1658 | if (face->style_flags & FT_STYLE_FLAG_ITALIC) { |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1659 | slant = SkFontStyle::kItalic_Slant; |
| 1660 | } |
| 1661 | |
| 1662 | PS_FontInfoRec psFontInfo; |
| 1663 | TT_OS2* os2 = static_cast<TT_OS2*>(FT_Get_Sfnt_Table(face, ft_sfnt_os2)); |
| 1664 | if (os2 && os2->version != 0xffff) { |
| 1665 | weight = os2->usWeightClass; |
| 1666 | width = os2->usWidthClass; |
bungeman | b4bb7d8 | 2016-04-27 10:21:04 -0700 | [diff] [blame] | 1667 | |
| 1668 | // OS/2::fsSelection bit 9 indicates oblique. |
| 1669 | if (SkToBool(os2->fsSelection & (1u << 9))) { |
| 1670 | slant = SkFontStyle::kOblique_Slant; |
| 1671 | } |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1672 | } else if (0 == FT_Get_PS_Font_Info(face, &psFontInfo) && psFontInfo.weight) { |
| 1673 | static const struct { |
| 1674 | char const * const name; |
| 1675 | int const weight; |
| 1676 | } commonWeights [] = { |
| 1677 | // There are probably more common names, but these are known to exist. |
bungeman | d803cda | 2015-04-16 14:22:46 -0700 | [diff] [blame] | 1678 | { "all", SkFontStyle::kNormal_Weight }, // Multiple Masters usually default to normal. |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1679 | { "black", SkFontStyle::kBlack_Weight }, |
| 1680 | { "bold", SkFontStyle::kBold_Weight }, |
| 1681 | { "book", (SkFontStyle::kNormal_Weight + SkFontStyle::kLight_Weight)/2 }, |
| 1682 | { "demi", SkFontStyle::kSemiBold_Weight }, |
| 1683 | { "demibold", SkFontStyle::kSemiBold_Weight }, |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1684 | { "extra", SkFontStyle::kExtraBold_Weight }, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1685 | { "extrabold", SkFontStyle::kExtraBold_Weight }, |
| 1686 | { "extralight", SkFontStyle::kExtraLight_Weight }, |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1687 | { "hairline", SkFontStyle::kThin_Weight }, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1688 | { "heavy", SkFontStyle::kBlack_Weight }, |
| 1689 | { "light", SkFontStyle::kLight_Weight }, |
| 1690 | { "medium", SkFontStyle::kMedium_Weight }, |
| 1691 | { "normal", SkFontStyle::kNormal_Weight }, |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1692 | { "plain", SkFontStyle::kNormal_Weight }, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1693 | { "regular", SkFontStyle::kNormal_Weight }, |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1694 | { "roman", SkFontStyle::kNormal_Weight }, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1695 | { "semibold", SkFontStyle::kSemiBold_Weight }, |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1696 | { "standard", SkFontStyle::kNormal_Weight }, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1697 | { "thin", SkFontStyle::kThin_Weight }, |
| 1698 | { "ultra", SkFontStyle::kExtraBold_Weight }, |
| 1699 | { "ultrablack", 1000 }, |
| 1700 | { "ultrabold", SkFontStyle::kExtraBold_Weight }, |
| 1701 | { "ultraheavy", 1000 }, |
| 1702 | { "ultralight", SkFontStyle::kExtraLight_Weight }, |
| 1703 | }; |
| 1704 | int const index = SkStrLCSearch(&commonWeights[0].name, SK_ARRAY_COUNT(commonWeights), |
bungeman | d2ae728 | 2014-10-22 08:25:44 -0700 | [diff] [blame] | 1705 | psFontInfo.weight, sizeof(commonWeights[0])); |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1706 | if (index >= 0) { |
| 1707 | weight = commonWeights[index].weight; |
| 1708 | } else { |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1709 | SkDEBUGF(("Do not know weight for: %s (%s) \n", face->family_name, psFontInfo.weight)); |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1710 | } |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1711 | } |
| 1712 | |
| 1713 | if (name) { |
| 1714 | name->set(face->family_name); |
| 1715 | } |
| 1716 | if (style) { |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1717 | *style = SkFontStyle(weight, width, slant); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1718 | } |
bungeman@google.com | fe74765 | 2013-03-25 19:36:11 +0000 | [diff] [blame] | 1719 | if (isFixedPitch) { |
| 1720 | *isFixedPitch = FT_IS_FIXED_WIDTH(face); |
reed@google.com | 5b31b0f | 2011-02-23 14:41:42 +0000 | [diff] [blame] | 1721 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1722 | |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 1723 | if (axes && face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1724 | FT_MM_Var* variations = nullptr; |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 1725 | FT_Error err = FT_Get_MM_Var(face, &variations); |
| 1726 | if (err) { |
| 1727 | SkDEBUGF(("INFO: font %s claims to have variations, but none found.\n", |
| 1728 | face->family_name)); |
| 1729 | return false; |
| 1730 | } |
| 1731 | SkAutoFree autoFreeVariations(variations); |
| 1732 | |
| 1733 | axes->reset(variations->num_axis); |
| 1734 | for (FT_UInt i = 0; i < variations->num_axis; ++i) { |
| 1735 | const FT_Var_Axis& ftAxis = variations->axis[i]; |
| 1736 | (*axes)[i].fTag = ftAxis.tag; |
| 1737 | (*axes)[i].fMinimum = ftAxis.minimum; |
| 1738 | (*axes)[i].fDefault = ftAxis.def; |
| 1739 | (*axes)[i].fMaximum = ftAxis.maximum; |
| 1740 | } |
| 1741 | } |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 1742 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1743 | FT_Done_Face(face); |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1744 | return true; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1745 | } |
bungeman | f6c7107 | 2016-01-21 14:17:47 -0800 | [diff] [blame] | 1746 | |
| 1747 | /*static*/ void SkTypeface_FreeType::Scanner::computeAxisValues( |
| 1748 | AxisDefinitions axisDefinitions, |
| 1749 | const SkFontMgr::FontParameters::Axis* requestedAxes, int requestedAxisCount, |
| 1750 | SkFixed* axisValues, |
| 1751 | const SkString& name) |
| 1752 | { |
| 1753 | for (int i = 0; i < axisDefinitions.count(); ++i) { |
| 1754 | const Scanner::AxisDefinition& axisDefinition = axisDefinitions[i]; |
benjaminwagner | 64a3c95 | 2016-02-25 12:20:40 -0800 | [diff] [blame] | 1755 | const SkScalar axisMin = SkFixedToScalar(axisDefinition.fMinimum); |
| 1756 | const SkScalar axisMax = SkFixedToScalar(axisDefinition.fMaximum); |
bungeman | f6c7107 | 2016-01-21 14:17:47 -0800 | [diff] [blame] | 1757 | axisValues[i] = axisDefinition.fDefault; |
| 1758 | for (int j = 0; j < requestedAxisCount; ++j) { |
| 1759 | const SkFontMgr::FontParameters::Axis& axisSpecified = requestedAxes[j]; |
| 1760 | if (axisDefinition.fTag == axisSpecified.fTag) { |
benjaminwagner | 64a3c95 | 2016-02-25 12:20:40 -0800 | [diff] [blame] | 1761 | const SkScalar axisValue = SkTPin(axisSpecified.fStyleValue, axisMin, axisMax); |
| 1762 | if (axisSpecified.fStyleValue != axisValue) { |
bungeman | f6c7107 | 2016-01-21 14:17:47 -0800 | [diff] [blame] | 1763 | SkDEBUGF(("Requested font axis value out of range: " |
| 1764 | "%s '%c%c%c%c' %f; pinned to %f.\n", |
| 1765 | name.c_str(), |
| 1766 | (axisDefinition.fTag >> 24) & 0xFF, |
| 1767 | (axisDefinition.fTag >> 16) & 0xFF, |
| 1768 | (axisDefinition.fTag >> 8) & 0xFF, |
| 1769 | (axisDefinition.fTag ) & 0xFF, |
| 1770 | SkScalarToDouble(axisSpecified.fStyleValue), |
benjaminwagner | 64a3c95 | 2016-02-25 12:20:40 -0800 | [diff] [blame] | 1771 | SkScalarToDouble(axisValue))); |
bungeman | f6c7107 | 2016-01-21 14:17:47 -0800 | [diff] [blame] | 1772 | } |
benjaminwagner | 64a3c95 | 2016-02-25 12:20:40 -0800 | [diff] [blame] | 1773 | axisValues[i] = SkScalarToFixed(axisValue); |
bungeman | f6c7107 | 2016-01-21 14:17:47 -0800 | [diff] [blame] | 1774 | break; |
| 1775 | } |
| 1776 | } |
| 1777 | // TODO: warn on defaulted axis? |
| 1778 | } |
| 1779 | |
| 1780 | SkDEBUGCODE( |
| 1781 | // Check for axis specified, but not matched in font. |
| 1782 | for (int i = 0; i < requestedAxisCount; ++i) { |
| 1783 | SkFourByteTag skTag = requestedAxes[i].fTag; |
| 1784 | bool found = false; |
| 1785 | for (int j = 0; j < axisDefinitions.count(); ++j) { |
| 1786 | if (skTag == axisDefinitions[j].fTag) { |
| 1787 | found = true; |
| 1788 | break; |
| 1789 | } |
| 1790 | } |
| 1791 | if (!found) { |
| 1792 | SkDEBUGF(("Requested font axis not found: %s '%c%c%c%c'\n", |
| 1793 | name.c_str(), |
| 1794 | (skTag >> 24) & 0xFF, |
| 1795 | (skTag >> 16) & 0xFF, |
| 1796 | (skTag >> 8) & 0xFF, |
| 1797 | (skTag) & 0xFF)); |
| 1798 | } |
| 1799 | } |
| 1800 | ) |
| 1801 | } |