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" |
Cary Clark | a4083c9 | 2017-09-15 11:59:23 -0400 | [diff] [blame] | 11 | #include "SkColorData.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" |
bungeman | 7cfd46a | 2016-10-20 16:06:52 -0400 | [diff] [blame] | 17 | #include "SkMakeUnique.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 18 | #include "SkMask.h" |
bungeman@google.com | 97efada | 2012-07-30 20:40:50 +0000 | [diff] [blame] | 19 | #include "SkMaskGamma.h" |
bungeman@google.com | d3fbd34 | 2014-04-15 15:52:07 +0000 | [diff] [blame] | 20 | #include "SkMatrix22.h" |
Herb Derby | b549cc3 | 2017-03-27 13:35:15 -0400 | [diff] [blame] | 21 | #include "SkMalloc.h" |
mtklein | 1b24933 | 2015-07-07 12:21:21 -0700 | [diff] [blame] | 22 | #include "SkMutex.h" |
bungeman@google.com | a980269 | 2013-08-07 02:45:25 +0000 | [diff] [blame] | 23 | #include "SkOTUtils.h" |
bungeman | d3ebb48 | 2015-08-05 13:57:49 -0700 | [diff] [blame] | 24 | #include "SkPath.h" |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 25 | #include "SkScalerContext.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 26 | #include "SkStream.h" |
| 27 | #include "SkString.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 28 | #include "SkTemplates.h" |
mtklein | 5f939ab | 2016-03-16 10:28:35 -0700 | [diff] [blame] | 29 | #include <memory> |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 30 | |
| 31 | #include <ft2build.h> |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 32 | #include FT_ADVANCES_H |
| 33 | #include FT_BITMAP_H |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 34 | #include FT_FREETYPE_H |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 35 | #include FT_LCD_FILTER_H |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 36 | #include FT_MODULE_H |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 37 | #include FT_MULTIPLE_MASTERS_H |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 38 | #include FT_OUTLINE_H |
| 39 | #include FT_SIZES_H |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 40 | #include FT_SYSTEM_H |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 41 | #include FT_TRUETYPE_TABLES_H |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 42 | #include FT_TYPE1_TABLES_H |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 43 | #include FT_XFREE86_H |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 44 | |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 45 | // SK_FREETYPE_MINIMUM_RUNTIME_VERSION 0x<major><minor><patch><flags> |
| 46 | // Flag SK_FREETYPE_DLOPEN: also try dlopen to get newer features. |
| 47 | #define SK_FREETYPE_DLOPEN (0x1) |
| 48 | #ifndef SK_FREETYPE_MINIMUM_RUNTIME_VERSION |
| 49 | # if defined(SK_BUILD_FOR_ANDROID_FRAMEWORK) || defined (GOOGLE3) |
| 50 | # define SK_FREETYPE_MINIMUM_RUNTIME_VERSION (((FREETYPE_MAJOR) << 24) | ((FREETYPE_MINOR) << 16) | ((FREETYPE_PATCH) << 8)) |
| 51 | # else |
| 52 | # define SK_FREETYPE_MINIMUM_RUNTIME_VERSION ((2 << 24) | (3 << 16) | (11 << 8) | (SK_FREETYPE_DLOPEN)) |
| 53 | # endif |
| 54 | #endif |
| 55 | #if SK_FREETYPE_MINIMUM_RUNTIME_VERSION & SK_FREETYPE_DLOPEN |
| 56 | # include <dlfcn.h> |
| 57 | #endif |
| 58 | |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 59 | // FT_LOAD_COLOR and the corresponding FT_Pixel_Mode::FT_PIXEL_MODE_BGRA |
| 60 | // were introduced in FreeType 2.5.0. |
| 61 | // The following may be removed once FreeType 2.5.0 is required to build. |
| 62 | #ifndef FT_LOAD_COLOR |
| 63 | # define FT_LOAD_COLOR ( 1L << 20 ) |
| 64 | # define FT_PIXEL_MODE_BGRA 7 |
| 65 | #endif |
| 66 | |
Seigo Nonaka | 52ab2f5 | 2016-12-05 02:41:53 +0900 | [diff] [blame] | 67 | // FT_LOAD_BITMAP_METRICS_ONLY was introduced in FreeType 2.7.1 |
| 68 | // The following may be removed once FreeType 2.7.1 is required to build. |
| 69 | #ifndef FT_LOAD_BITMAP_METRICS_ONLY |
| 70 | # define FT_LOAD_BITMAP_METRICS_ONLY ( 1L << 22 ) |
| 71 | #endif |
| 72 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 73 | //#define ENABLE_GLYPH_SPEW // for tracing calls |
| 74 | //#define DUMP_STRIKE_CREATION |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 75 | //#define SK_FONTHOST_FREETYPE_RUNTIME_VERSION |
reed@google.com | 1ac8350 | 2012-02-28 17:06:02 +0000 | [diff] [blame] | 76 | //#define SK_GAMMA_APPLY_TO_A8 |
reed@google.com | 1ac8350 | 2012-02-28 17:06:02 +0000 | [diff] [blame] | 77 | |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 78 | static bool isLCD(const SkScalerContext::Rec& rec) { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 79 | return SkMask::kLCD16_Format == rec.fMaskFormat; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 80 | } |
| 81 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 82 | ////////////////////////////////////////////////////////////////////////// |
| 83 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 84 | extern "C" { |
| 85 | static void* sk_ft_alloc(FT_Memory, long size) { |
| 86 | return sk_malloc_throw(size); |
| 87 | } |
| 88 | static void sk_ft_free(FT_Memory, void* block) { |
| 89 | sk_free(block); |
| 90 | } |
| 91 | static void* sk_ft_realloc(FT_Memory, long cur_size, long new_size, void* block) { |
| 92 | return sk_realloc_throw(block, new_size); |
| 93 | } |
| 94 | }; |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 95 | FT_MemoryRec_ gFTMemory = { nullptr, sk_ft_alloc, sk_ft_free, sk_ft_realloc }; |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 96 | |
| 97 | class FreeTypeLibrary : SkNoncopyable { |
| 98 | public: |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 99 | FreeTypeLibrary() |
| 100 | : fGetVarDesignCoordinates(nullptr) |
| 101 | , fLibrary(nullptr) |
| 102 | , fIsLCDSupported(false) |
| 103 | , fLCDExtra(0) |
| 104 | { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 105 | if (FT_New_Library(&gFTMemory, &fLibrary)) { |
| 106 | return; |
| 107 | } |
| 108 | FT_Add_Default_Modules(fLibrary); |
| 109 | |
Ben Wagner | 2a098d0 | 2017-03-01 13:00:53 -0500 | [diff] [blame] | 110 | // When using dlsym |
| 111 | // *(void**)(&procPtr) = dlsym(self, "proc"); |
| 112 | // is non-standard, but safe for POSIX. Cannot write |
| 113 | // *reinterpret_cast<void**>(&procPtr) = dlsym(self, "proc"); |
| 114 | // because clang has not implemented DR573. See http://clang.llvm.org/cxx_dr_status.html . |
| 115 | |
| 116 | FT_Int major, minor, patch; |
| 117 | FT_Library_Version(fLibrary, &major, &minor, &patch); |
| 118 | |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 119 | #if SK_FREETYPE_MINIMUM_RUNTIME_VERSION >= 0x02070100 |
| 120 | fGetVarDesignCoordinates = FT_Get_Var_Design_Coordinates; |
| 121 | #elif SK_FREETYPE_MINIMUM_RUNTIME_VERSION & SK_FREETYPE_DLOPEN |
Ben Wagner | 2a098d0 | 2017-03-01 13:00:53 -0500 | [diff] [blame] | 122 | if (major > 2 || ((major == 2 && minor > 7) || (major == 2 && minor == 7 && patch >= 0))) { |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 123 | //The FreeType library is already loaded, so symbols are available in process. |
| 124 | void* self = dlopen(nullptr, RTLD_LAZY); |
| 125 | if (self) { |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 126 | *(void**)(&fGetVarDesignCoordinates) = dlsym(self, "FT_Get_Var_Design_Coordinates"); |
| 127 | dlclose(self); |
| 128 | } |
| 129 | } |
| 130 | #endif |
| 131 | |
Ben Wagner | 2a098d0 | 2017-03-01 13:00:53 -0500 | [diff] [blame] | 132 | #if SK_FREETYPE_MINIMUM_RUNTIME_VERSION >= 0x02070200 |
| 133 | FT_Set_Default_Properties(fLibrary); |
| 134 | #elif SK_FREETYPE_MINIMUM_RUNTIME_VERSION & SK_FREETYPE_DLOPEN |
| 135 | if (major > 2 || ((major == 2 && minor > 7) || (major == 2 && minor == 7 && patch >= 1))) { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 136 | //The FreeType library is already loaded, so symbols are available in process. |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 137 | void* self = dlopen(nullptr, RTLD_LAZY); |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 138 | if (self) { |
Ben Wagner | 2a098d0 | 2017-03-01 13:00:53 -0500 | [diff] [blame] | 139 | FT_Set_Default_PropertiesProc setDefaultProperties; |
| 140 | *(void**)(&setDefaultProperties) = dlsym(self, "FT_Set_Default_Properties"); |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 141 | dlclose(self); |
| 142 | |
Ben Wagner | 2a098d0 | 2017-03-01 13:00:53 -0500 | [diff] [blame] | 143 | if (setDefaultProperties) { |
| 144 | setDefaultProperties(fLibrary); |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 145 | } |
| 146 | } |
Ben Wagner | 2a098d0 | 2017-03-01 13:00:53 -0500 | [diff] [blame] | 147 | } |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 148 | #endif |
Ben Wagner | 2a098d0 | 2017-03-01 13:00:53 -0500 | [diff] [blame] | 149 | |
| 150 | // Setup LCD filtering. This reduces color fringes for LCD smoothed glyphs. |
| 151 | // The default has changed over time, so this doesn't mean the same thing to all users. |
| 152 | if (FT_Library_SetLcdFilter(fLibrary, FT_LCD_FILTER_DEFAULT) == 0) { |
| 153 | fIsLCDSupported = true; |
| 154 | fLCDExtra = 2; //Using a filter adds one full pixel to each side. |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 155 | } |
| 156 | } |
| 157 | ~FreeTypeLibrary() { |
| 158 | if (fLibrary) { |
| 159 | FT_Done_Library(fLibrary); |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | FT_Library library() { return fLibrary; } |
| 164 | bool isLCDSupported() { return fIsLCDSupported; } |
| 165 | int lcdExtra() { return fLCDExtra; } |
| 166 | |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 167 | // FT_Get_{MM,Var}_{Blend,Design}_Coordinates were added in FreeType 2.7.1. |
| 168 | // Prior to this there was no way to get the coordinates out of the FT_Face. |
| 169 | // This wasn't too bad because you needed to specify them anyway, and the clamp was provided. |
| 170 | // However, this doesn't work when face_index specifies named variations as introduced in 2.6.1. |
| 171 | using FT_Get_Var_Blend_CoordinatesProc = FT_Error (*)(FT_Face, FT_UInt, FT_Fixed*); |
| 172 | FT_Get_Var_Blend_CoordinatesProc fGetVarDesignCoordinates; |
| 173 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 174 | private: |
| 175 | FT_Library fLibrary; |
| 176 | bool fIsLCDSupported; |
| 177 | int fLCDExtra; |
| 178 | |
| 179 | // FT_Library_SetLcdFilterWeights was introduced in FreeType 2.4.0. |
| 180 | // The following platforms provide FreeType of at least 2.4.0. |
| 181 | // Ubuntu >= 11.04 (previous deprecated April 2013) |
| 182 | // Debian >= 6.0 (good) |
| 183 | // OpenSuse >= 11.4 (previous deprecated January 2012 / Nov 2013 for Evergreen 11.2) |
| 184 | // Fedora >= 14 (good) |
| 185 | // Android >= Gingerbread (good) |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 186 | // RHEL >= 7 (6 has 2.3.11, EOL Nov 2020, Phase 3 May 2017) |
| 187 | using FT_Library_SetLcdFilterWeightsProc = FT_Error (*)(FT_Library, unsigned char*); |
Ben Wagner | 2a098d0 | 2017-03-01 13:00:53 -0500 | [diff] [blame] | 188 | |
| 189 | // FreeType added the ability to read global properties in 2.7.0. After 2.7.1 a means for users |
| 190 | // of FT_New_Library to request these global properties to be read was added. |
| 191 | using FT_Set_Default_PropertiesProc = void (*)(FT_Library); |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 192 | }; |
| 193 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 194 | struct SkFaceRec; |
| 195 | |
reed | 086eea9 | 2016-05-04 17:12:46 -0700 | [diff] [blame] | 196 | SK_DECLARE_STATIC_MUTEX(gFTMutex); |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 197 | static FreeTypeLibrary* gFTLibrary; |
| 198 | static SkFaceRec* gFaceRecHead; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 199 | |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 200 | // Private to ref_ft_library and unref_ft_library |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 201 | static int gFTCount; |
bungeman@google.com | fd668cf | 2012-08-24 17:46:11 +0000 | [diff] [blame] | 202 | |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 203 | // Caller must lock gFTMutex before calling this function. |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 204 | static bool ref_ft_library() { |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 205 | gFTMutex.assertHeld(); |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 206 | SkASSERT(gFTCount >= 0); |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 207 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 208 | if (0 == gFTCount) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 209 | SkASSERT(nullptr == gFTLibrary); |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 210 | gFTLibrary = new FreeTypeLibrary; |
reed@google.com | ea2333d | 2011-03-14 16:44:56 +0000 | [diff] [blame] | 211 | } |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 212 | ++gFTCount; |
| 213 | return gFTLibrary->library(); |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 214 | } |
| 215 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 216 | // Caller must lock gFTMutex before calling this function. |
| 217 | static void unref_ft_library() { |
| 218 | gFTMutex.assertHeld(); |
| 219 | SkASSERT(gFTCount > 0); |
commit-bot@chromium.org | ba9354b | 2014-02-10 19:58:49 +0000 | [diff] [blame] | 220 | |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 221 | --gFTCount; |
| 222 | if (0 == gFTCount) { |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 223 | SkASSERT(nullptr == gFaceRecHead); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 224 | SkASSERT(nullptr != gFTLibrary); |
halcanary | 385fe4d | 2015-08-26 13:07:48 -0700 | [diff] [blame] | 225 | delete gFTLibrary; |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 226 | SkDEBUGCODE(gFTLibrary = nullptr;) |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 227 | } |
reed@google.com | fb2fdcc | 2012-10-17 15:49:36 +0000 | [diff] [blame] | 228 | } |
| 229 | |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 230 | /////////////////////////////////////////////////////////////////////////// |
| 231 | |
| 232 | struct SkFaceRec { |
| 233 | SkFaceRec* fNext; |
| 234 | std::unique_ptr<FT_FaceRec, SkFunctionWrapper<FT_Error, FT_FaceRec, FT_Done_Face>> fFace; |
| 235 | FT_StreamRec fFTStream; |
| 236 | std::unique_ptr<SkStreamAsset> fSkStream; |
| 237 | uint32_t fRefCnt; |
| 238 | uint32_t fFontID; |
| 239 | |
| 240 | // FreeType prior to 2.7.1 does not implement retreiving variation design metrics. |
| 241 | // Cache the variation design metrics used to create the font if the user specifies them. |
| 242 | SkAutoSTMalloc<4, SkFixed> fAxes; |
| 243 | int fAxesCount; |
| 244 | |
| 245 | // FreeType from 2.6.1 (14d6b5d7) until 2.7.0 (ee3f36f6b38) uses font_index for both font index |
| 246 | // and named variation index on input, but masks the named variation index part on output. |
| 247 | // Manually keep track of when a named variation is requested for 2.6.1 until 2.7.1. |
| 248 | bool fNamedVariationSpecified; |
| 249 | |
| 250 | SkFaceRec(std::unique_ptr<SkStreamAsset> stream, uint32_t fontID); |
| 251 | }; |
| 252 | |
| 253 | extern "C" { |
| 254 | static unsigned long sk_ft_stream_io(FT_Stream ftStream, |
| 255 | unsigned long offset, |
| 256 | unsigned char* buffer, |
| 257 | unsigned long count) |
| 258 | { |
| 259 | SkStreamAsset* stream = static_cast<SkStreamAsset*>(ftStream->descriptor.pointer); |
| 260 | |
| 261 | if (count) { |
| 262 | if (!stream->seek(offset)) { |
| 263 | return 0; |
| 264 | } |
| 265 | count = stream->read(buffer, count); |
| 266 | } |
| 267 | return count; |
| 268 | } |
| 269 | |
| 270 | static void sk_ft_stream_close(FT_Stream) {} |
| 271 | } |
| 272 | |
| 273 | SkFaceRec::SkFaceRec(std::unique_ptr<SkStreamAsset> stream, uint32_t fontID) |
| 274 | : fNext(nullptr), fSkStream(std::move(stream)), fRefCnt(1), fFontID(fontID) |
| 275 | , fAxesCount(0), fNamedVariationSpecified(false) |
| 276 | { |
| 277 | sk_bzero(&fFTStream, sizeof(fFTStream)); |
| 278 | fFTStream.size = fSkStream->getLength(); |
| 279 | fFTStream.descriptor.pointer = fSkStream.get(); |
| 280 | fFTStream.read = sk_ft_stream_io; |
| 281 | fFTStream.close = sk_ft_stream_close; |
| 282 | } |
| 283 | |
| 284 | static void ft_face_setup_axes(SkFaceRec* rec, const SkFontData& data) { |
| 285 | if (!(rec->fFace->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS)) { |
| 286 | return; |
| 287 | } |
| 288 | |
| 289 | // If a named variation is requested, don't overwrite the named variation's position. |
| 290 | if (data.getIndex() > 0xFFFF) { |
| 291 | rec->fNamedVariationSpecified = true; |
| 292 | return; |
| 293 | } |
| 294 | |
| 295 | SkDEBUGCODE( |
| 296 | FT_MM_Var* variations = nullptr; |
| 297 | if (FT_Get_MM_Var(rec->fFace.get(), &variations)) { |
| 298 | SkDEBUGF(("INFO: font %s claims variations, but none found.\n", |
| 299 | rec->fFace->family_name)); |
| 300 | return; |
| 301 | } |
| 302 | SkAutoFree autoFreeVariations(variations); |
| 303 | |
| 304 | if (static_cast<FT_UInt>(data.getAxisCount()) != variations->num_axis) { |
| 305 | SkDEBUGF(("INFO: font %s has %d variations, but %d were specified.\n", |
| 306 | rec->fFace->family_name, variations->num_axis, data.getAxisCount())); |
| 307 | return; |
| 308 | } |
| 309 | ) |
| 310 | |
| 311 | SkAutoSTMalloc<4, FT_Fixed> coords(data.getAxisCount()); |
| 312 | for (int i = 0; i < data.getAxisCount(); ++i) { |
| 313 | coords[i] = data.getAxis()[i]; |
| 314 | } |
| 315 | if (FT_Set_Var_Design_Coordinates(rec->fFace.get(), data.getAxisCount(), coords.get())) { |
| 316 | SkDEBUGF(("INFO: font %s has variations, but specified variations could not be set.\n", |
| 317 | rec->fFace->family_name)); |
| 318 | return; |
| 319 | } |
| 320 | |
| 321 | rec->fAxesCount = data.getAxisCount(); |
| 322 | rec->fAxes.reset(rec->fAxesCount); |
| 323 | for (int i = 0; i < rec->fAxesCount; ++i) { |
| 324 | rec->fAxes[i] = data.getAxis()[i]; |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | // Will return nullptr on failure |
| 329 | // Caller must lock gFTMutex before calling this function. |
| 330 | static SkFaceRec* ref_ft_face(const SkTypeface* typeface) { |
| 331 | gFTMutex.assertHeld(); |
| 332 | |
| 333 | const SkFontID fontID = typeface->uniqueID(); |
| 334 | SkFaceRec* cachedRec = gFaceRecHead; |
| 335 | while (cachedRec) { |
| 336 | if (cachedRec->fFontID == fontID) { |
| 337 | SkASSERT(cachedRec->fFace); |
| 338 | cachedRec->fRefCnt += 1; |
| 339 | return cachedRec; |
| 340 | } |
| 341 | cachedRec = cachedRec->fNext; |
| 342 | } |
| 343 | |
| 344 | std::unique_ptr<SkFontData> data = typeface->makeFontData(); |
| 345 | if (nullptr == data || !data->hasStream()) { |
| 346 | return nullptr; |
| 347 | } |
| 348 | |
| 349 | std::unique_ptr<SkFaceRec> rec(new SkFaceRec(data->detachStream(), fontID)); |
| 350 | |
| 351 | FT_Open_Args args; |
| 352 | memset(&args, 0, sizeof(args)); |
| 353 | const void* memoryBase = rec->fSkStream->getMemoryBase(); |
| 354 | if (memoryBase) { |
| 355 | args.flags = FT_OPEN_MEMORY; |
| 356 | args.memory_base = (const FT_Byte*)memoryBase; |
| 357 | args.memory_size = rec->fSkStream->getLength(); |
| 358 | } else { |
| 359 | args.flags = FT_OPEN_STREAM; |
| 360 | args.stream = &rec->fFTStream; |
| 361 | } |
| 362 | |
| 363 | { |
| 364 | FT_Face rawFace; |
| 365 | FT_Error err = FT_Open_Face(gFTLibrary->library(), &args, data->getIndex(), &rawFace); |
| 366 | if (err) { |
| 367 | SkDEBUGF(("ERROR: unable to open font '%x'\n", fontID)); |
| 368 | return nullptr; |
| 369 | } |
| 370 | rec->fFace.reset(rawFace); |
| 371 | } |
| 372 | SkASSERT(rec->fFace); |
| 373 | |
| 374 | ft_face_setup_axes(rec.get(), *data); |
| 375 | |
| 376 | // FreeType will set the charmap to the "most unicode" cmap if it exists. |
| 377 | // If there are no unicode cmaps, the charmap is set to nullptr. |
| 378 | // However, "symbol" cmaps should also be considered "fallback unicode" cmaps |
| 379 | // because they are effectively private use area only (even if they aren't). |
| 380 | // This is the last on the fallback list at |
| 381 | // https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6cmap.html |
| 382 | if (!rec->fFace->charmap) { |
| 383 | FT_Select_Charmap(rec->fFace.get(), FT_ENCODING_MS_SYMBOL); |
| 384 | } |
| 385 | |
| 386 | rec->fNext = gFaceRecHead; |
| 387 | gFaceRecHead = rec.get(); |
| 388 | return rec.release(); |
| 389 | } |
| 390 | |
| 391 | // Caller must lock gFTMutex before calling this function. |
Ben Wagner | f1b61af | 2017-03-09 15:12:09 -0500 | [diff] [blame] | 392 | // Marked extern because vc++ does not support internal linkage template parameters. |
| 393 | extern /*static*/ void unref_ft_face(SkFaceRec* faceRec) { |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 394 | gFTMutex.assertHeld(); |
| 395 | |
| 396 | SkFaceRec* rec = gFaceRecHead; |
| 397 | SkFaceRec* prev = nullptr; |
| 398 | while (rec) { |
| 399 | SkFaceRec* next = rec->fNext; |
| 400 | if (rec->fFace == faceRec->fFace) { |
| 401 | if (--rec->fRefCnt == 0) { |
| 402 | if (prev) { |
| 403 | prev->fNext = next; |
| 404 | } else { |
| 405 | gFaceRecHead = next; |
| 406 | } |
| 407 | delete rec; |
| 408 | } |
| 409 | return; |
| 410 | } |
| 411 | prev = rec; |
| 412 | rec = next; |
| 413 | } |
| 414 | SkDEBUGFAIL("shouldn't get here, face not in list"); |
| 415 | } |
| 416 | |
| 417 | class AutoFTAccess { |
| 418 | public: |
| 419 | AutoFTAccess(const SkTypeface* tf) : fFaceRec(nullptr) { |
| 420 | gFTMutex.acquire(); |
Ben Wagner | 7ca9a74 | 2017-08-17 14:05:04 -0400 | [diff] [blame] | 421 | SkASSERT_RELEASE(ref_ft_library()); |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 422 | fFaceRec = ref_ft_face(tf); |
| 423 | } |
| 424 | |
| 425 | ~AutoFTAccess() { |
| 426 | if (fFaceRec) { |
| 427 | unref_ft_face(fFaceRec); |
| 428 | } |
| 429 | unref_ft_library(); |
| 430 | gFTMutex.release(); |
| 431 | } |
| 432 | |
| 433 | FT_Face face() { return fFaceRec ? fFaceRec->fFace.get() : nullptr; } |
| 434 | int getAxesCount() { return fFaceRec ? fFaceRec->fAxesCount : 0; } |
| 435 | SkFixed* getAxes() { return fFaceRec ? fFaceRec->fAxes.get() : nullptr; } |
| 436 | bool isNamedVariationSpecified() { |
| 437 | return fFaceRec ? fFaceRec->fNamedVariationSpecified : false; |
| 438 | } |
| 439 | |
| 440 | private: |
| 441 | SkFaceRec* fFaceRec; |
| 442 | }; |
| 443 | |
| 444 | /////////////////////////////////////////////////////////////////////////// |
| 445 | |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 446 | class SkScalerContext_FreeType : public SkScalerContext_FreeType_Base { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 447 | public: |
bungeman | 7cfd46a | 2016-10-20 16:06:52 -0400 | [diff] [blame] | 448 | SkScalerContext_FreeType(sk_sp<SkTypeface>, |
| 449 | const SkScalerContextEffects&, |
| 450 | const SkDescriptor* desc); |
Brian Salomon | d3b6597 | 2017-03-22 12:05:03 -0400 | [diff] [blame] | 451 | ~SkScalerContext_FreeType() override; |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 452 | |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 453 | bool success() const { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 454 | return fFTSize != nullptr && fFace != nullptr; |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 455 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 456 | |
| 457 | protected: |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 458 | unsigned generateGlyphCount() override; |
| 459 | uint16_t generateCharToGlyph(SkUnichar uni) override; |
| 460 | void generateAdvance(SkGlyph* glyph) override; |
| 461 | void generateMetrics(SkGlyph* glyph) override; |
| 462 | void generateImage(const SkGlyph& glyph) override; |
Ben Wagner | 6e9ac12 | 2016-11-11 14:31:06 -0500 | [diff] [blame] | 463 | void generatePath(SkGlyphID glyphID, SkPath* path) override; |
mtklein | 36352bf | 2015-03-25 18:17:31 -0700 | [diff] [blame] | 464 | void generateFontMetrics(SkPaint::FontMetrics*) override; |
| 465 | SkUnichar generateGlyphToChar(uint16_t glyph) override; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 466 | |
| 467 | private: |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 468 | using UnrefFTFace = SkFunctionWrapper<void, SkFaceRec, unref_ft_face>; |
| 469 | std::unique_ptr<SkFaceRec, UnrefFTFace> fFaceRec; |
| 470 | |
| 471 | FT_Face fFace; // Borrowed face from gFaceRecHead. |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 472 | FT_Size fFTSize; // The size on the fFace for this scaler. |
| 473 | FT_Int fStrikeIndex; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 474 | |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 475 | /** The rest of the matrix after FreeType handles the size. |
| 476 | * With outline font rasterization this is handled by FreeType with FT_Set_Transform. |
| 477 | * With bitmap only fonts this matrix must be applied to scale the bitmap. |
| 478 | */ |
| 479 | SkMatrix fMatrix22Scalar; |
| 480 | /** Same as fMatrix22Scalar, but in FreeType units and space. */ |
| 481 | FT_Matrix fMatrix22; |
| 482 | /** The actual size requested. */ |
| 483 | SkVector fScale; |
| 484 | |
| 485 | uint32_t fLoadGlyphFlags; |
| 486 | bool fDoLinearMetrics; |
| 487 | bool fLCDIsVert; |
reed@google.com | f073b33 | 2013-05-06 12:21:16 +0000 | [diff] [blame] | 488 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 489 | FT_Error setupSize(); |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 490 | void getBBoxForCurrentGlyph(SkGlyph* glyph, FT_BBox* bbox, |
| 491 | bool snapToPixelBoundary = false); |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 492 | bool getCBoxForLetter(char letter, FT_BBox* bbox); |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 493 | // Caller must lock gFTMutex before calling this function. |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 494 | void updateGlyphIfLCD(SkGlyph* glyph); |
commit-bot@chromium.org | 6fa81d7 | 2013-12-26 15:50:29 +0000 | [diff] [blame] | 495 | // Caller must lock gFTMutex before calling this function. |
| 496 | // update FreeType2 glyph slot with glyph emboldened |
Ben Wagner | c3aef18 | 2017-06-26 12:47:33 -0400 | [diff] [blame] | 497 | void emboldenIfNeeded(FT_Face face, FT_GlyphSlot glyph, SkGlyphID gid); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 498 | bool shouldSubpixelBitmap(const SkGlyph&, const SkMatrix&); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 499 | }; |
| 500 | |
| 501 | /////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 502 | |
vandebo@chromium.org | 16be6b8 | 2011-01-28 21:28:56 +0000 | [diff] [blame] | 503 | static bool canEmbed(FT_Face face) { |
vandebo@chromium.org | 16be6b8 | 2011-01-28 21:28:56 +0000 | [diff] [blame] | 504 | FT_UShort fsType = FT_Get_FSType_Flags(face); |
| 505 | return (fsType & (FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING | |
| 506 | FT_FSTYPE_BITMAP_EMBEDDING_ONLY)) == 0; |
vandebo@chromium.org | 16be6b8 | 2011-01-28 21:28:56 +0000 | [diff] [blame] | 507 | } |
| 508 | |
vandebo | 0f9bad0 | 2014-06-19 11:05:39 -0700 | [diff] [blame] | 509 | static bool canSubset(FT_Face face) { |
vandebo | 0f9bad0 | 2014-06-19 11:05:39 -0700 | [diff] [blame] | 510 | FT_UShort fsType = FT_Get_FSType_Flags(face); |
| 511 | return (fsType & FT_FSTYPE_NO_SUBSETTING) == 0; |
vandebo | 0f9bad0 | 2014-06-19 11:05:39 -0700 | [diff] [blame] | 512 | } |
| 513 | |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 514 | static void populate_glyph_to_unicode(FT_Face& face, SkTDArray<SkUnichar>* glyphToUnicode) { |
halcanary | f8c74a1 | 2016-04-20 08:37:43 -0700 | [diff] [blame] | 515 | FT_Long numGlyphs = face->num_glyphs; |
| 516 | glyphToUnicode->setCount(SkToInt(numGlyphs)); |
| 517 | sk_bzero(glyphToUnicode->begin(), sizeof((*glyphToUnicode)[0]) * numGlyphs); |
vandebo@chromium.org | 6744d49 | 2011-05-09 18:13:47 +0000 | [diff] [blame] | 518 | |
bungeman | 726cf90 | 2015-06-05 13:38:12 -0700 | [diff] [blame] | 519 | FT_UInt glyphIndex; |
| 520 | SkUnichar charCode = FT_Get_First_Char(face, &glyphIndex); |
| 521 | while (glyphIndex) { |
halcanary | f8c74a1 | 2016-04-20 08:37:43 -0700 | [diff] [blame] | 522 | SkASSERT(glyphIndex < SkToUInt(numGlyphs)); |
halcanary | 5f1d0f6 | 2016-09-13 08:08:38 -0700 | [diff] [blame] | 523 | // Use the first character that maps to this glyphID. https://crbug.com/359065 |
| 524 | if (0 == (*glyphToUnicode)[glyphIndex]) { |
| 525 | (*glyphToUnicode)[glyphIndex] = charCode; |
| 526 | } |
bungeman | 726cf90 | 2015-06-05 13:38:12 -0700 | [diff] [blame] | 527 | charCode = FT_Get_Next_Char(face, charCode, &glyphIndex); |
vandebo@chromium.org | 6744d49 | 2011-05-09 18:13:47 +0000 | [diff] [blame] | 528 | } |
| 529 | } |
| 530 | |
Hal Canary | 209e4b1 | 2017-05-04 14:23:55 -0400 | [diff] [blame] | 531 | std::unique_ptr<SkAdvancedTypefaceMetrics> SkTypeface_FreeType::onGetAdvancedMetrics() const { |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 532 | AutoFTAccess fta(this); |
| 533 | FT_Face face = fta.face(); |
| 534 | if (!face) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 535 | return nullptr; |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 536 | } |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 537 | |
Hal Canary | 209e4b1 | 2017-05-04 14:23:55 -0400 | [diff] [blame] | 538 | std::unique_ptr<SkAdvancedTypefaceMetrics> info(new SkAdvancedTypefaceMetrics); |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 539 | info->fFontName.set(FT_Get_Postscript_Name(face)); |
halcanary | 3287588 | 2016-08-16 09:36:23 -0700 | [diff] [blame] | 540 | |
vandebo | 0f9bad0 | 2014-06-19 11:05:39 -0700 | [diff] [blame] | 541 | if (FT_HAS_MULTIPLE_MASTERS(face)) { |
halcanary | 3287588 | 2016-08-16 09:36:23 -0700 | [diff] [blame] | 542 | info->fFlags |= SkAdvancedTypefaceMetrics::kMultiMaster_FontFlag; |
vandebo | 0f9bad0 | 2014-06-19 11:05:39 -0700 | [diff] [blame] | 543 | } |
| 544 | if (!canEmbed(face)) { |
halcanary | 3287588 | 2016-08-16 09:36:23 -0700 | [diff] [blame] | 545 | info->fFlags |= SkAdvancedTypefaceMetrics::kNotEmbeddable_FontFlag; |
vandebo | 0f9bad0 | 2014-06-19 11:05:39 -0700 | [diff] [blame] | 546 | } |
| 547 | if (!canSubset(face)) { |
halcanary | 3287588 | 2016-08-16 09:36:23 -0700 | [diff] [blame] | 548 | info->fFlags |= SkAdvancedTypefaceMetrics::kNotSubsettable_FontFlag; |
vandebo | 0f9bad0 | 2014-06-19 11:05:39 -0700 | [diff] [blame] | 549 | } |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 550 | |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 551 | const char* fontType = FT_Get_X11_Font_Format(face); |
vandebo@chromium.org | c3a2ae5 | 2011-02-03 21:48:23 +0000 | [diff] [blame] | 552 | if (strcmp(fontType, "Type 1") == 0) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 553 | info->fType = SkAdvancedTypefaceMetrics::kType1_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 554 | } else if (strcmp(fontType, "CID Type 1") == 0) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 555 | info->fType = SkAdvancedTypefaceMetrics::kType1CID_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 556 | } else if (strcmp(fontType, "CFF") == 0) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 557 | info->fType = SkAdvancedTypefaceMetrics::kCFF_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 558 | } else if (strcmp(fontType, "TrueType") == 0) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 559 | info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font; |
bungeman@google.com | 4d71db8 | 2013-12-02 19:10:02 +0000 | [diff] [blame] | 560 | } else { |
| 561 | info->fType = SkAdvancedTypefaceMetrics::kOther_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 562 | } |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 563 | |
halcanary | 3287588 | 2016-08-16 09:36:23 -0700 | [diff] [blame] | 564 | info->fStyle = (SkAdvancedTypefaceMetrics::StyleFlags)0; |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame] | 565 | if (FT_IS_FIXED_WIDTH(face)) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 566 | info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style; |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame] | 567 | } |
| 568 | if (face->style_flags & FT_STYLE_FLAG_ITALIC) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 569 | info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style; |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame] | 570 | } |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 571 | |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame] | 572 | PS_FontInfoRec psFontInfo; |
| 573 | TT_Postscript* postTable; |
| 574 | if (FT_Get_PS_Font_Info(face, &psFontInfo) == 0) { |
| 575 | info->fItalicAngle = psFontInfo.italic_angle; |
| 576 | } else if ((postTable = (TT_Postscript*)FT_Get_Sfnt_Table(face, ft_sfnt_post)) != nullptr) { |
Ben Wagner | 4f6fc83 | 2017-09-15 16:00:40 -0400 | [diff] [blame] | 577 | info->fItalicAngle = SkFixedFloorToInt(postTable->italicAngle); |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 578 | } else { |
| 579 | info->fItalicAngle = 0; |
| 580 | } |
| 581 | |
| 582 | info->fAscent = face->ascender; |
| 583 | info->fDescent = face->descender; |
| 584 | |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame] | 585 | TT_PCLT* pcltTable; |
| 586 | TT_OS2* os2Table; |
| 587 | if ((pcltTable = (TT_PCLT*)FT_Get_Sfnt_Table(face, ft_sfnt_pclt)) != nullptr) { |
| 588 | info->fCapHeight = pcltTable->CapHeight; |
| 589 | uint8_t serif_style = pcltTable->SerifStyle & 0x3F; |
| 590 | if (2 <= serif_style && serif_style <= 6) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 591 | info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style; |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame] | 592 | } else if (9 <= serif_style && serif_style <= 12) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 593 | info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style; |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame] | 594 | } |
| 595 | } 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] | 596 | // sCapHeight is available only when version 2 or later. |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame] | 597 | os2Table->version != 0xFFFF && |
| 598 | os2Table->version >= 2) |
| 599 | { |
| 600 | info->fCapHeight = os2Table->sCapHeight; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 601 | } |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 602 | info->fBBox = SkIRect::MakeLTRB(face->bbox.xMin, face->bbox.yMax, |
| 603 | face->bbox.xMax, face->bbox.yMin); |
| 604 | |
Hal Canary | 209e4b1 | 2017-05-04 14:23:55 -0400 | [diff] [blame] | 605 | bool perGlyphInfo = FT_IS_SCALABLE(face); |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 606 | |
Hal Canary | 209e4b1 | 2017-05-04 14:23:55 -0400 | [diff] [blame] | 607 | if (perGlyphInfo && info->fType == SkAdvancedTypefaceMetrics::kType1_Font) { |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 608 | // Postscript fonts may contain more than 255 glyphs, so we end up |
| 609 | // using multiple font descriptions with a glyph ordering. Record |
| 610 | // the name of each glyph. |
halcanary | 8b1d32c | 2016-08-08 09:09:59 -0700 | [diff] [blame] | 611 | info->fGlyphNames.reset(face->num_glyphs); |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 612 | for (int gID = 0; gID < face->num_glyphs; gID++) { |
| 613 | char glyphName[128]; // PS limit for names is 127 bytes. |
| 614 | FT_Get_Glyph_Name(face, gID, glyphName, 128); |
halcanary | 8b1d32c | 2016-08-08 09:09:59 -0700 | [diff] [blame] | 615 | info->fGlyphNames[gID].set(glyphName); |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 616 | } |
| 617 | } |
| 618 | |
Hal Canary | 209e4b1 | 2017-05-04 14:23:55 -0400 | [diff] [blame] | 619 | if (perGlyphInfo && |
bungeman | f149169 | 2016-07-22 11:19:24 -0700 | [diff] [blame] | 620 | info->fType != SkAdvancedTypefaceMetrics::kType1_Font && |
| 621 | face->num_charmaps) |
| 622 | { |
vandebo@chromium.org | 6744d49 | 2011-05-09 18:13:47 +0000 | [diff] [blame] | 623 | populate_glyph_to_unicode(face, &(info->fGlyphToUnicode)); |
| 624 | } |
| 625 | |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 626 | return info; |
| 627 | } |
vandebo@chromium.org | 37ad8fb | 2011-08-18 02:38:50 +0000 | [diff] [blame] | 628 | |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 629 | /////////////////////////////////////////////////////////////////////////// |
| 630 | |
reed@google.com | 8ed436c | 2011-07-21 14:12:36 +0000 | [diff] [blame] | 631 | static bool bothZero(SkScalar a, SkScalar b) { |
| 632 | return 0 == a && 0 == b; |
| 633 | } |
| 634 | |
| 635 | // returns false if there is any non-90-rotation or skew |
| 636 | static bool isAxisAligned(const SkScalerContext::Rec& rec) { |
| 637 | return 0 == rec.fPreSkewX && |
| 638 | (bothZero(rec.fPost2x2[0][1], rec.fPost2x2[1][0]) || |
| 639 | bothZero(rec.fPost2x2[0][0], rec.fPost2x2[1][1])); |
| 640 | } |
| 641 | |
reed | a9322c2 | 2016-04-12 06:47:05 -0700 | [diff] [blame] | 642 | SkScalerContext* SkTypeface_FreeType::onCreateScalerContext(const SkScalerContextEffects& effects, |
| 643 | const SkDescriptor* desc) const { |
bungeman | 7cfd46a | 2016-10-20 16:06:52 -0400 | [diff] [blame] | 644 | auto c = skstd::make_unique<SkScalerContext_FreeType>( |
| 645 | sk_ref_sp(const_cast<SkTypeface_FreeType*>(this)), effects, desc); |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 646 | if (!c->success()) { |
Ben Wagner | c05b2bf | 2016-11-03 16:51:26 -0400 | [diff] [blame] | 647 | return nullptr; |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 648 | } |
bungeman | 7cfd46a | 2016-10-20 16:06:52 -0400 | [diff] [blame] | 649 | return c.release(); |
reed@google.com | 0da4861 | 2013-03-19 16:06:52 +0000 | [diff] [blame] | 650 | } |
| 651 | |
| 652 | void SkTypeface_FreeType::onFilterRec(SkScalerContextRec* rec) const { |
bungeman@google.com | 8cf3226 | 2012-04-02 14:34:30 +0000 | [diff] [blame] | 653 | //BOGUS: http://code.google.com/p/chromium/issues/detail?id=121119 |
| 654 | //Cap the requested size as larger sizes give bogus values. |
| 655 | //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] | 656 | //Note that this also currently only protects against large text size requests, |
| 657 | //the total matrix is not taken into account here. |
bungeman@google.com | 5582e63 | 2012-04-02 14:51:54 +0000 | [diff] [blame] | 658 | if (rec->fTextSize > SkIntToScalar(1 << 14)) { |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 659 | rec->fTextSize = SkIntToScalar(1 << 14); |
bungeman@google.com | 8cf3226 | 2012-04-02 14:34:30 +0000 | [diff] [blame] | 660 | } |
skia.committer@gmail.com | a27096b | 2012-08-30 14:38:00 +0000 | [diff] [blame] | 661 | |
bungeman | ec7e12f | 2015-01-21 11:55:16 -0800 | [diff] [blame] | 662 | if (isLCD(*rec)) { |
bungeman | d4742fa | 2015-01-21 11:19:22 -0800 | [diff] [blame] | 663 | // TODO: re-work so that FreeType is set-up and selected by the SkFontMgr. |
| 664 | SkAutoMutexAcquire ama(gFTMutex); |
| 665 | ref_ft_library(); |
bungeman | ec7e12f | 2015-01-21 11:55:16 -0800 | [diff] [blame] | 666 | if (!gFTLibrary->isLCDSupported()) { |
bungeman | d4742fa | 2015-01-21 11:19:22 -0800 | [diff] [blame] | 667 | // If the runtime Freetype library doesn't support LCD, disable it here. |
| 668 | rec->fMaskFormat = SkMask::kA8_Format; |
| 669 | } |
| 670 | unref_ft_library(); |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 671 | } |
reed@google.com | 5b31b0f | 2011-02-23 14:41:42 +0000 | [diff] [blame] | 672 | |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 673 | SkPaint::Hinting h = rec->getHinting(); |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 674 | if (SkPaint::kFull_Hinting == h && !isLCD(*rec)) { |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 675 | // collapse full->normal hinting if we're not doing LCD |
| 676 | h = SkPaint::kNormal_Hinting; |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 677 | } |
reed@google.com | 1ac8350 | 2012-02-28 17:06:02 +0000 | [diff] [blame] | 678 | |
reed@google.com | 8ed436c | 2011-07-21 14:12:36 +0000 | [diff] [blame] | 679 | // rotated text looks bad with hinting, so we disable it as needed |
| 680 | if (!isAxisAligned(*rec)) { |
| 681 | h = SkPaint::kNo_Hinting; |
| 682 | } |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 683 | rec->setHinting(h); |
reed@google.com | ffe49f5 | 2011-11-22 19:42:41 +0000 | [diff] [blame] | 684 | |
bungeman@google.com | 97efada | 2012-07-30 20:40:50 +0000 | [diff] [blame] | 685 | #ifndef SK_GAMMA_APPLY_TO_A8 |
| 686 | if (!isLCD(*rec)) { |
brianosman | a1e8f8d | 2016-04-08 06:47:54 -0700 | [diff] [blame] | 687 | // SRGBTODO: Is this correct? Do we want contrast boost? |
| 688 | rec->ignorePreBlend(); |
reed@google.com | ffe49f5 | 2011-11-22 19:42:41 +0000 | [diff] [blame] | 689 | } |
reed@google.com | 1ac8350 | 2012-02-28 17:06:02 +0000 | [diff] [blame] | 690 | #endif |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 691 | } |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 692 | |
reed@google.com | 38c37dd | 2013-03-21 15:36:26 +0000 | [diff] [blame] | 693 | int SkTypeface_FreeType::onGetUPEM() const { |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 694 | AutoFTAccess fta(this); |
| 695 | FT_Face face = fta.face(); |
| 696 | return face ? face->units_per_EM : 0; |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 697 | } |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 698 | |
reed@google.com | 35fe737 | 2013-10-30 15:07:03 +0000 | [diff] [blame] | 699 | bool SkTypeface_FreeType::onGetKerningPairAdjustments(const uint16_t glyphs[], |
| 700 | int count, int32_t adjustments[]) const { |
| 701 | AutoFTAccess fta(this); |
| 702 | FT_Face face = fta.face(); |
| 703 | if (!face || !FT_HAS_KERNING(face)) { |
| 704 | return false; |
| 705 | } |
| 706 | |
| 707 | for (int i = 0; i < count - 1; ++i) { |
| 708 | FT_Vector delta; |
| 709 | FT_Error err = FT_Get_Kerning(face, glyphs[i], glyphs[i+1], |
| 710 | FT_KERNING_UNSCALED, &delta); |
| 711 | if (err) { |
| 712 | return false; |
| 713 | } |
| 714 | adjustments[i] = delta.x; |
| 715 | } |
| 716 | return true; |
| 717 | } |
| 718 | |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 719 | /** Returns the bitmap strike equal to or just larger than the requested size. */ |
benjaminwagner | 4534562 | 2016-02-19 15:30:20 -0800 | [diff] [blame] | 720 | static FT_Int chooseBitmapStrike(FT_Face face, FT_F26Dot6 scaleY) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 721 | if (face == nullptr) { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 722 | SkDEBUGF(("chooseBitmapStrike aborted due to nullptr face.\n")); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 723 | return -1; |
| 724 | } |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 725 | |
| 726 | 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] | 727 | FT_Int chosenStrikeIndex = -1; |
| 728 | FT_Pos chosenPPEM = 0; |
| 729 | for (FT_Int strikeIndex = 0; strikeIndex < face->num_fixed_sizes; ++strikeIndex) { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 730 | FT_Pos strikePPEM = face->available_sizes[strikeIndex].y_ppem; |
| 731 | if (strikePPEM == requestedPPEM) { |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 732 | // exact match - our search stops here |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 733 | return strikeIndex; |
| 734 | } else if (chosenPPEM < requestedPPEM) { |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 735 | // attempt to increase chosenPPEM |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 736 | if (chosenPPEM < strikePPEM) { |
| 737 | chosenPPEM = strikePPEM; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 738 | chosenStrikeIndex = strikeIndex; |
| 739 | } |
| 740 | } else { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 741 | // attempt to decrease chosenPPEM, but not below requestedPPEM |
| 742 | if (requestedPPEM < strikePPEM && strikePPEM < chosenPPEM) { |
| 743 | chosenPPEM = strikePPEM; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 744 | chosenStrikeIndex = strikeIndex; |
| 745 | } |
| 746 | } |
| 747 | } |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 748 | return chosenStrikeIndex; |
| 749 | } |
| 750 | |
bungeman | 7cfd46a | 2016-10-20 16:06:52 -0400 | [diff] [blame] | 751 | SkScalerContext_FreeType::SkScalerContext_FreeType(sk_sp<SkTypeface> typeface, |
reed | a9322c2 | 2016-04-12 06:47:05 -0700 | [diff] [blame] | 752 | const SkScalerContextEffects& effects, |
| 753 | const SkDescriptor* desc) |
bungeman | 7cfd46a | 2016-10-20 16:06:52 -0400 | [diff] [blame] | 754 | : SkScalerContext_FreeType_Base(std::move(typeface), effects, desc) |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 755 | , fFace(nullptr) |
| 756 | , fFTSize(nullptr) |
| 757 | , fStrikeIndex(-1) |
bungeman | 13a007d | 2015-06-19 05:09:39 -0700 | [diff] [blame] | 758 | { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 759 | SkAutoMutexAcquire ac(gFTMutex); |
Ben Wagner | 7ca9a74 | 2017-08-17 14:05:04 -0400 | [diff] [blame] | 760 | SkASSERT_RELEASE(ref_ft_library()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 761 | |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 762 | fFaceRec.reset(ref_ft_face(this->getTypeface())); |
| 763 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 764 | // load the font file |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 765 | if (nullptr == fFaceRec) { |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 766 | SkDEBUGF(("Could not create FT_Face.\n")); |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 767 | return; |
| 768 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 769 | |
bungeman | 5f14c5e | 2014-12-05 12:26:44 -0800 | [diff] [blame] | 770 | fRec.computeMatrices(SkScalerContextRec::kFull_PreMatrixScale, &fScale, &fMatrix22Scalar); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 771 | |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 772 | FT_F26Dot6 scaleX = SkScalarToFDot6(fScale.fX); |
| 773 | FT_F26Dot6 scaleY = SkScalarToFDot6(fScale.fY); |
bungeman@google.com | d3fbd34 | 2014-04-15 15:52:07 +0000 | [diff] [blame] | 774 | fMatrix22.xx = SkScalarToFixed(fMatrix22Scalar.getScaleX()); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 775 | fMatrix22.xy = SkScalarToFixed(-fMatrix22Scalar.getSkewX()); |
| 776 | fMatrix22.yx = SkScalarToFixed(-fMatrix22Scalar.getSkewY()); |
bungeman@google.com | d3fbd34 | 2014-04-15 15:52:07 +0000 | [diff] [blame] | 777 | fMatrix22.yy = SkScalarToFixed(fMatrix22Scalar.getScaleY()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 778 | |
reed@google.com | a1bfa21 | 2012-03-08 21:57:12 +0000 | [diff] [blame] | 779 | fLCDIsVert = SkToBool(fRec.fFlags & SkScalerContext::kLCD_Vertical_Flag); |
| 780 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 781 | // compute the flags we send to Load_Glyph |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 782 | bool linearMetrics = SkToBool(fRec.fFlags & SkScalerContext::kSubpixelPositioning_Flag); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 783 | { |
reed@android.com | e4d0bc0 | 2009-07-24 19:53:20 +0000 | [diff] [blame] | 784 | FT_Int32 loadFlags = FT_LOAD_DEFAULT; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 785 | |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 786 | if (SkMask::kBW_Format == fRec.fMaskFormat) { |
| 787 | // See http://code.google.com/p/chromium/issues/detail?id=43252#c24 |
| 788 | loadFlags = FT_LOAD_TARGET_MONO; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 789 | if (fRec.getHinting() == SkPaint::kNo_Hinting) { |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 790 | loadFlags = FT_LOAD_NO_HINTING; |
reed@google.com | bdc9988 | 2011-11-21 14:36:57 +0000 | [diff] [blame] | 791 | linearMetrics = true; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 792 | } |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 793 | } else { |
| 794 | switch (fRec.getHinting()) { |
| 795 | case SkPaint::kNo_Hinting: |
| 796 | loadFlags = FT_LOAD_NO_HINTING; |
reed@google.com | bdc9988 | 2011-11-21 14:36:57 +0000 | [diff] [blame] | 797 | linearMetrics = true; |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 798 | break; |
| 799 | case SkPaint::kSlight_Hinting: |
| 800 | loadFlags = FT_LOAD_TARGET_LIGHT; // This implies FORCE_AUTOHINT |
| 801 | break; |
| 802 | case SkPaint::kNormal_Hinting: |
bungeman@google.com | f6f5687 | 2014-01-23 19:01:36 +0000 | [diff] [blame] | 803 | if (fRec.fFlags & SkScalerContext::kForceAutohinting_Flag) { |
agl@chromium.org | a2c71cb | 2010-06-17 20:49:17 +0000 | [diff] [blame] | 804 | loadFlags = FT_LOAD_FORCE_AUTOHINT; |
djsollen | 858a789 | 2014-08-20 07:03:23 -0700 | [diff] [blame] | 805 | #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK |
| 806 | } else { |
| 807 | loadFlags = FT_LOAD_NO_AUTOHINT; |
| 808 | #endif |
bungeman@google.com | f6f5687 | 2014-01-23 19:01:36 +0000 | [diff] [blame] | 809 | } |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 810 | break; |
| 811 | case SkPaint::kFull_Hinting: |
bungeman@google.com | f6f5687 | 2014-01-23 19:01:36 +0000 | [diff] [blame] | 812 | if (fRec.fFlags & SkScalerContext::kForceAutohinting_Flag) { |
agl@chromium.org | a2c71cb | 2010-06-17 20:49:17 +0000 | [diff] [blame] | 813 | loadFlags = FT_LOAD_FORCE_AUTOHINT; |
| 814 | break; |
| 815 | } |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 816 | loadFlags = FT_LOAD_TARGET_NORMAL; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 817 | if (isLCD(fRec)) { |
reed@google.com | a1bfa21 | 2012-03-08 21:57:12 +0000 | [diff] [blame] | 818 | if (fLCDIsVert) { |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 819 | loadFlags = FT_LOAD_TARGET_LCD_V; |
| 820 | } else { |
| 821 | loadFlags = FT_LOAD_TARGET_LCD; |
| 822 | } |
reed@google.com | ea2333d | 2011-03-14 16:44:56 +0000 | [diff] [blame] | 823 | } |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 824 | break; |
| 825 | default: |
| 826 | SkDebugf("---------- UNKNOWN hinting %d\n", fRec.getHinting()); |
| 827 | break; |
| 828 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 829 | } |
| 830 | |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 831 | if ((fRec.fFlags & SkScalerContext::kEmbeddedBitmapText_Flag) == 0) { |
agl@chromium.org | e0d0899 | 2009-08-07 19:19:23 +0000 | [diff] [blame] | 832 | loadFlags |= FT_LOAD_NO_BITMAP; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 833 | } |
agl@chromium.org | e0d0899 | 2009-08-07 19:19:23 +0000 | [diff] [blame] | 834 | |
reed@google.com | 96a9f791 | 2011-05-06 11:49:30 +0000 | [diff] [blame] | 835 | // Always using FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH to get correct |
| 836 | // advances, as fontconfig and cairo do. |
| 837 | // See http://code.google.com/p/skia/issues/detail?id=222. |
| 838 | loadFlags |= FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH; |
| 839 | |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 840 | // Use vertical layout if requested. |
| 841 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 842 | loadFlags |= FT_LOAD_VERTICAL_LAYOUT; |
| 843 | } |
| 844 | |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 845 | loadFlags |= FT_LOAD_COLOR; |
| 846 | |
reed@android.com | e4d0bc0 | 2009-07-24 19:53:20 +0000 | [diff] [blame] | 847 | fLoadGlyphFlags = loadFlags; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 848 | } |
| 849 | |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 850 | using DoneFTSize = SkFunctionWrapper<FT_Error, skstd::remove_pointer_t<FT_Size>, FT_Done_Size>; |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 851 | std::unique_ptr<skstd::remove_pointer_t<FT_Size>, DoneFTSize> ftSize([this]() -> FT_Size { |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 852 | FT_Size size; |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 853 | FT_Error err = FT_New_Size(fFaceRec->fFace.get(), &size); |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 854 | if (err != 0) { |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 855 | SkDEBUGF(("FT_New_Size(%s) returned 0x%x.\n", fFaceRec->fFace->family_name, err)); |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 856 | return nullptr; |
| 857 | } |
| 858 | return size; |
| 859 | }()); |
| 860 | if (nullptr == ftSize) { |
| 861 | SkDEBUGF(("Could not create FT_Size.\n")); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 862 | return; |
| 863 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 864 | |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 865 | FT_Error err = FT_Activate_Size(ftSize.get()); |
| 866 | if (err != 0) { |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 867 | SkDEBUGF(("FT_Activate_Size(%s) returned 0x%x.\n", fFaceRec->fFace->family_name, err)); |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 868 | return; |
| 869 | } |
| 870 | |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 871 | if (FT_IS_SCALABLE(fFaceRec->fFace)) { |
| 872 | err = FT_Set_Char_Size(fFaceRec->fFace.get(), scaleX, scaleY, 72, 72); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 873 | if (err != 0) { |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 874 | SkDEBUGF(("FT_Set_CharSize(%s, %f, %f) returned 0x%x.\n", |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 875 | fFaceRec->fFace->family_name, fScale.fX, fScale.fY, err)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 876 | return; |
| 877 | } |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 878 | } else if (FT_HAS_FIXED_SIZES(fFaceRec->fFace)) { |
| 879 | fStrikeIndex = chooseBitmapStrike(fFaceRec->fFace.get(), scaleY); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 880 | if (fStrikeIndex == -1) { |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 881 | SkDEBUGF(("No glyphs for font \"%s\" size %f.\n", |
| 882 | fFaceRec->fFace->family_name, fScale.fY)); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 883 | return; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 884 | } |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 885 | |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 886 | err = FT_Select_Size(fFaceRec->fFace.get(), fStrikeIndex); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 887 | if (err != 0) { |
| 888 | SkDEBUGF(("FT_Select_Size(%s, %d) returned 0x%x.\n", |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 889 | fFaceRec->fFace->family_name, fStrikeIndex, err)); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 890 | fStrikeIndex = -1; |
| 891 | return; |
| 892 | } |
| 893 | |
| 894 | // A non-ideal size was picked, so recompute the matrix. |
| 895 | // This adjusts for the difference between FT_Set_Char_Size and FT_Select_Size. |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 896 | fMatrix22Scalar.preScale(fScale.x() / fFaceRec->fFace->size->metrics.x_ppem, |
| 897 | fScale.y() / fFaceRec->fFace->size->metrics.y_ppem); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 898 | fMatrix22.xx = SkScalarToFixed(fMatrix22Scalar.getScaleX()); |
| 899 | fMatrix22.xy = SkScalarToFixed(-fMatrix22Scalar.getSkewX()); |
| 900 | fMatrix22.yx = SkScalarToFixed(-fMatrix22Scalar.getSkewY()); |
| 901 | fMatrix22.yy = SkScalarToFixed(fMatrix22Scalar.getScaleY()); |
| 902 | |
| 903 | // FreeType does not provide linear metrics for bitmap fonts. |
| 904 | linearMetrics = false; |
| 905 | |
| 906 | // FreeType documentation says: |
| 907 | // FT_LOAD_NO_BITMAP -- Ignore bitmap strikes when loading. |
| 908 | // Bitmap-only fonts ignore this flag. |
| 909 | // |
| 910 | // However, in FreeType 2.5.1 color bitmap only fonts do not ignore this flag. |
| 911 | // Force this flag off for bitmap only fonts. |
| 912 | fLoadGlyphFlags &= ~FT_LOAD_NO_BITMAP; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 913 | } else { |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 914 | SkDEBUGF(("Unknown kind of font \"%s\" size %f.\n", fFaceRec->fFace->family_name, fScale.fY)); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 915 | return; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 916 | } |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 917 | |
bungeman | aabd71c | 2016-03-01 15:15:09 -0800 | [diff] [blame] | 918 | fFTSize = ftSize.release(); |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 919 | fFace = fFaceRec->fFace.get(); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 920 | fDoLinearMetrics = linearMetrics; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 921 | } |
| 922 | |
| 923 | SkScalerContext_FreeType::~SkScalerContext_FreeType() { |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 924 | SkAutoMutexAcquire ac(gFTMutex); |
| 925 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 926 | if (fFTSize != nullptr) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 927 | FT_Done_Size(fFTSize); |
| 928 | } |
| 929 | |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 930 | fFaceRec = nullptr; |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 931 | |
| 932 | unref_ft_library(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 933 | } |
| 934 | |
| 935 | /* We call this before each use of the fFace, since we may be sharing |
| 936 | this face with other context (at different sizes). |
| 937 | */ |
| 938 | FT_Error SkScalerContext_FreeType::setupSize() { |
bungeman | 3f846ae | 2015-11-03 11:07:20 -0800 | [diff] [blame] | 939 | gFTMutex.assertHeld(); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 940 | FT_Error err = FT_Activate_Size(fFTSize); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 941 | if (err != 0) { |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 942 | return err; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 943 | } |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 944 | FT_Set_Transform(fFace, &fMatrix22, nullptr); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 945 | return 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 946 | } |
| 947 | |
ctguil@chromium.org | 0bc7bf5 | 2011-03-04 19:04:57 +0000 | [diff] [blame] | 948 | unsigned SkScalerContext_FreeType::generateGlyphCount() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 949 | return fFace->num_glyphs; |
| 950 | } |
| 951 | |
| 952 | uint16_t SkScalerContext_FreeType::generateCharToGlyph(SkUnichar uni) { |
bungeman | 3f846ae | 2015-11-03 11:07:20 -0800 | [diff] [blame] | 953 | SkAutoMutexAcquire ac(gFTMutex); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 954 | return SkToU16(FT_Get_Char_Index( fFace, uni )); |
| 955 | } |
| 956 | |
reed@android.com | 9d3a985 | 2010-01-08 14:07:42 +0000 | [diff] [blame] | 957 | SkUnichar SkScalerContext_FreeType::generateGlyphToChar(uint16_t glyph) { |
bungeman | 3f846ae | 2015-11-03 11:07:20 -0800 | [diff] [blame] | 958 | SkAutoMutexAcquire ac(gFTMutex); |
reed@android.com | 9d3a985 | 2010-01-08 14:07:42 +0000 | [diff] [blame] | 959 | // iterate through each cmap entry, looking for matching glyph indices |
| 960 | FT_UInt glyphIndex; |
| 961 | SkUnichar charCode = FT_Get_First_Char( fFace, &glyphIndex ); |
| 962 | |
| 963 | while (glyphIndex != 0) { |
| 964 | if (glyphIndex == glyph) { |
| 965 | return charCode; |
| 966 | } |
| 967 | charCode = FT_Get_Next_Char( fFace, charCode, &glyphIndex ); |
| 968 | } |
| 969 | |
| 970 | return 0; |
| 971 | } |
| 972 | |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 973 | static SkScalar SkFT_FixedToScalar(FT_Fixed x) { |
| 974 | return SkFixedToScalar(x); |
| 975 | } |
| 976 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 977 | void SkScalerContext_FreeType::generateAdvance(SkGlyph* glyph) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 978 | /* unhinted and light hinted text have linearly scaled advances |
| 979 | * which are very cheap to compute with some font formats... |
| 980 | */ |
reed@google.com | bdc9988 | 2011-11-21 14:36:57 +0000 | [diff] [blame] | 981 | if (fDoLinearMetrics) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 982 | SkAutoMutexAcquire ac(gFTMutex); |
| 983 | |
| 984 | if (this->setupSize()) { |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 985 | glyph->zeroMetrics(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 986 | return; |
| 987 | } |
| 988 | |
| 989 | FT_Error error; |
| 990 | FT_Fixed advance; |
| 991 | |
djsollen | 1b27704 | 2014-08-06 06:58:06 -0700 | [diff] [blame] | 992 | error = FT_Get_Advance( fFace, glyph->getGlyphID(), |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 993 | fLoadGlyphFlags | FT_ADVANCE_FLAG_FAST_ONLY, |
| 994 | &advance ); |
| 995 | if (0 == error) { |
| 996 | glyph->fRsbDelta = 0; |
| 997 | glyph->fLsbDelta = 0; |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 998 | const SkScalar advanceScalar = SkFT_FixedToScalar(advance); |
| 999 | glyph->fAdvanceX = SkScalarToFloat(fMatrix22Scalar.getScaleX() * advanceScalar); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1000 | glyph->fAdvanceY = SkScalarToFloat(fMatrix22Scalar.getSkewY() * advanceScalar); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1001 | return; |
| 1002 | } |
| 1003 | } |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1004 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1005 | /* otherwise, we need to load/hint the glyph, which is slower */ |
| 1006 | this->generateMetrics(glyph); |
| 1007 | return; |
| 1008 | } |
| 1009 | |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1010 | void SkScalerContext_FreeType::getBBoxForCurrentGlyph(SkGlyph* glyph, |
| 1011 | FT_BBox* bbox, |
| 1012 | bool snapToPixelBoundary) { |
| 1013 | |
| 1014 | FT_Outline_Get_CBox(&fFace->glyph->outline, bbox); |
| 1015 | |
| 1016 | if (fRec.fFlags & SkScalerContext::kSubpixelPositioning_Flag) { |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 1017 | int dx = SkFixedToFDot6(glyph->getSubXFixed()); |
| 1018 | int dy = SkFixedToFDot6(glyph->getSubYFixed()); |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1019 | // negate dy since freetype-y-goes-up and skia-y-goes-down |
| 1020 | bbox->xMin += dx; |
| 1021 | bbox->yMin -= dy; |
| 1022 | bbox->xMax += dx; |
| 1023 | bbox->yMax -= dy; |
| 1024 | } |
| 1025 | |
| 1026 | // outset the box to integral boundaries |
| 1027 | if (snapToPixelBoundary) { |
| 1028 | bbox->xMin &= ~63; |
| 1029 | bbox->yMin &= ~63; |
| 1030 | bbox->xMax = (bbox->xMax + 63) & ~63; |
| 1031 | bbox->yMax = (bbox->yMax + 63) & ~63; |
| 1032 | } |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1033 | |
| 1034 | // Must come after snapToPixelBoundary so that the width and height are |
| 1035 | // consistent. Otherwise asserts will fire later on when generating the |
| 1036 | // glyph image. |
| 1037 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 1038 | FT_Vector vector; |
| 1039 | vector.x = fFace->glyph->metrics.vertBearingX - fFace->glyph->metrics.horiBearingX; |
| 1040 | vector.y = -fFace->glyph->metrics.vertBearingY - fFace->glyph->metrics.horiBearingY; |
| 1041 | FT_Vector_Transform(&vector, &fMatrix22); |
| 1042 | bbox->xMin += vector.x; |
| 1043 | bbox->xMax += vector.x; |
| 1044 | bbox->yMin += vector.y; |
| 1045 | bbox->yMax += vector.y; |
| 1046 | } |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1047 | } |
| 1048 | |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1049 | bool SkScalerContext_FreeType::getCBoxForLetter(char letter, FT_BBox* bbox) { |
| 1050 | const FT_UInt glyph_id = FT_Get_Char_Index(fFace, letter); |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1051 | if (!glyph_id) { |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1052 | return false; |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1053 | } |
| 1054 | if (FT_Load_Glyph(fFace, glyph_id, fLoadGlyphFlags) != 0) { |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1055 | return false; |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1056 | } |
Ben Wagner | c3aef18 | 2017-06-26 12:47:33 -0400 | [diff] [blame] | 1057 | emboldenIfNeeded(fFace, fFace->glyph, SkTo<SkGlyphID>(glyph_id)); |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1058 | FT_Outline_Get_CBox(&fFace->glyph->outline, bbox); |
| 1059 | return true; |
| 1060 | } |
| 1061 | |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1062 | void SkScalerContext_FreeType::updateGlyphIfLCD(SkGlyph* glyph) { |
| 1063 | if (isLCD(fRec)) { |
| 1064 | if (fLCDIsVert) { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 1065 | glyph->fHeight += gFTLibrary->lcdExtra(); |
| 1066 | glyph->fTop -= gFTLibrary->lcdExtra() >> 1; |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1067 | } else { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 1068 | glyph->fWidth += gFTLibrary->lcdExtra(); |
| 1069 | glyph->fLeft -= gFTLibrary->lcdExtra() >> 1; |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1070 | } |
| 1071 | } |
| 1072 | } |
| 1073 | |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1074 | bool SkScalerContext_FreeType::shouldSubpixelBitmap(const SkGlyph& glyph, const SkMatrix& matrix) { |
| 1075 | // If subpixel rendering of a bitmap *can* be done. |
| 1076 | bool mechanism = fFace->glyph->format == FT_GLYPH_FORMAT_BITMAP && |
| 1077 | fRec.fFlags & SkScalerContext::kSubpixelPositioning_Flag && |
| 1078 | (glyph.getSubXFixed() || glyph.getSubYFixed()); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1079 | |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1080 | // If subpixel rendering of a bitmap *should* be done. |
| 1081 | // 1. If the face is not scalable then always allow subpixel rendering. |
| 1082 | // Otherwise, if the font has an 8ppem strike 7 will subpixel render but 8 won't. |
| 1083 | // 2. If the matrix is already not identity the bitmap will already be resampled, |
| 1084 | // so resampling slightly differently shouldn't make much difference. |
| 1085 | bool policy = !FT_IS_SCALABLE(fFace) || !matrix.isIdentity(); |
| 1086 | |
| 1087 | return mechanism && policy; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1088 | } |
| 1089 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1090 | void SkScalerContext_FreeType::generateMetrics(SkGlyph* glyph) { |
| 1091 | SkAutoMutexAcquire ac(gFTMutex); |
| 1092 | |
| 1093 | glyph->fRsbDelta = 0; |
| 1094 | glyph->fLsbDelta = 0; |
| 1095 | |
| 1096 | FT_Error err; |
| 1097 | |
| 1098 | if (this->setupSize()) { |
bungeman | 13a007d | 2015-06-19 05:09:39 -0700 | [diff] [blame] | 1099 | glyph->zeroMetrics(); |
| 1100 | return; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1101 | } |
| 1102 | |
Seigo Nonaka | 52ab2f5 | 2016-12-05 02:41:53 +0900 | [diff] [blame] | 1103 | err = FT_Load_Glyph( fFace, glyph->getGlyphID(), |
| 1104 | fLoadGlyphFlags | FT_LOAD_BITMAP_METRICS_ONLY ); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1105 | if (err != 0) { |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 1106 | glyph->zeroMetrics(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1107 | return; |
| 1108 | } |
Ben Wagner | c3aef18 | 2017-06-26 12:47:33 -0400 | [diff] [blame] | 1109 | emboldenIfNeeded(fFace, fFace->glyph, glyph->getGlyphID()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1110 | |
| 1111 | switch ( fFace->glyph->format ) { |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1112 | case FT_GLYPH_FORMAT_OUTLINE: |
bungeman@google.com | 0f0c288 | 2011-11-04 15:47:41 +0000 | [diff] [blame] | 1113 | if (0 == fFace->glyph->outline.n_contours) { |
| 1114 | glyph->fWidth = 0; |
| 1115 | glyph->fHeight = 0; |
| 1116 | glyph->fTop = 0; |
| 1117 | glyph->fLeft = 0; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1118 | } else { |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1119 | FT_BBox bbox; |
| 1120 | getBBoxForCurrentGlyph(glyph, &bbox, true); |
| 1121 | |
| 1122 | glyph->fWidth = SkToU16(SkFDot6Floor(bbox.xMax - bbox.xMin)); |
| 1123 | glyph->fHeight = SkToU16(SkFDot6Floor(bbox.yMax - bbox.yMin)); |
| 1124 | glyph->fTop = -SkToS16(SkFDot6Floor(bbox.yMax)); |
| 1125 | glyph->fLeft = SkToS16(SkFDot6Floor(bbox.xMin)); |
| 1126 | |
| 1127 | updateGlyphIfLCD(glyph); |
bungeman@google.com | 0f0c288 | 2011-11-04 15:47:41 +0000 | [diff] [blame] | 1128 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1129 | break; |
| 1130 | |
| 1131 | case FT_GLYPH_FORMAT_BITMAP: |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1132 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 1133 | FT_Vector vector; |
| 1134 | vector.x = fFace->glyph->metrics.vertBearingX - fFace->glyph->metrics.horiBearingX; |
| 1135 | vector.y = -fFace->glyph->metrics.vertBearingY - fFace->glyph->metrics.horiBearingY; |
| 1136 | FT_Vector_Transform(&vector, &fMatrix22); |
| 1137 | fFace->glyph->bitmap_left += SkFDot6Floor(vector.x); |
| 1138 | fFace->glyph->bitmap_top += SkFDot6Floor(vector.y); |
| 1139 | } |
| 1140 | |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1141 | if (fFace->glyph->bitmap.pixel_mode == FT_PIXEL_MODE_BGRA) { |
| 1142 | glyph->fMaskFormat = SkMask::kARGB32_Format; |
| 1143 | } |
| 1144 | |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1145 | { |
| 1146 | SkRect rect = SkRect::MakeXYWH(SkIntToScalar(fFace->glyph->bitmap_left), |
| 1147 | -SkIntToScalar(fFace->glyph->bitmap_top), |
| 1148 | SkIntToScalar(fFace->glyph->bitmap.width), |
| 1149 | SkIntToScalar(fFace->glyph->bitmap.rows)); |
| 1150 | fMatrix22Scalar.mapRect(&rect); |
| 1151 | if (this->shouldSubpixelBitmap(*glyph, fMatrix22Scalar)) { |
| 1152 | rect.offset(SkFixedToScalar(glyph->getSubXFixed()), |
| 1153 | SkFixedToScalar(glyph->getSubYFixed())); |
| 1154 | } |
| 1155 | SkIRect irect = rect.roundOut(); |
| 1156 | glyph->fWidth = SkToU16(irect.width()); |
| 1157 | glyph->fHeight = SkToU16(irect.height()); |
| 1158 | glyph->fTop = SkToS16(irect.top()); |
| 1159 | glyph->fLeft = SkToS16(irect.left()); |
| 1160 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1161 | break; |
| 1162 | |
| 1163 | default: |
tomhudson@google.com | 0c00f21 | 2011-12-28 14:59:50 +0000 | [diff] [blame] | 1164 | SkDEBUGFAIL("unknown glyph format"); |
bungeman | 13a007d | 2015-06-19 05:09:39 -0700 | [diff] [blame] | 1165 | glyph->zeroMetrics(); |
| 1166 | return; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1167 | } |
| 1168 | |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1169 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 1170 | if (fDoLinearMetrics) { |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 1171 | const SkScalar advanceScalar = SkFT_FixedToScalar(fFace->glyph->linearVertAdvance); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1172 | glyph->fAdvanceX = SkScalarToFloat(fMatrix22Scalar.getSkewX() * advanceScalar); |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 1173 | glyph->fAdvanceY = SkScalarToFloat(fMatrix22Scalar.getScaleY() * advanceScalar); |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1174 | } else { |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 1175 | glyph->fAdvanceX = -SkFDot6ToFloat(fFace->glyph->advance.x); |
| 1176 | glyph->fAdvanceY = SkFDot6ToFloat(fFace->glyph->advance.y); |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1177 | } |
bungeman@google.com | 34f1026 | 2012-03-23 18:11:47 +0000 | [diff] [blame] | 1178 | } else { |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1179 | if (fDoLinearMetrics) { |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 1180 | const SkScalar advanceScalar = SkFT_FixedToScalar(fFace->glyph->linearHoriAdvance); |
| 1181 | glyph->fAdvanceX = SkScalarToFloat(fMatrix22Scalar.getScaleX() * advanceScalar); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1182 | glyph->fAdvanceY = SkScalarToFloat(fMatrix22Scalar.getSkewY() * advanceScalar); |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1183 | } else { |
benjaminwagner | 6b3eacb | 2016-03-24 19:07:58 -0700 | [diff] [blame] | 1184 | glyph->fAdvanceX = SkFDot6ToFloat(fFace->glyph->advance.x); |
| 1185 | glyph->fAdvanceY = -SkFDot6ToFloat(fFace->glyph->advance.y); |
bungeman@google.com | 34f1026 | 2012-03-23 18:11:47 +0000 | [diff] [blame] | 1186 | |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1187 | if (fRec.fFlags & kDevKernText_Flag) { |
| 1188 | glyph->fRsbDelta = SkToS8(fFace->glyph->rsb_delta); |
| 1189 | glyph->fLsbDelta = SkToS8(fFace->glyph->lsb_delta); |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1190 | } |
| 1191 | } |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1192 | } |
| 1193 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1194 | #ifdef ENABLE_GLYPH_SPEW |
djsollen | 1b27704 | 2014-08-06 06:58:06 -0700 | [diff] [blame] | 1195 | 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] | 1196 | #endif |
| 1197 | } |
| 1198 | |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1199 | static void clear_glyph_image(const SkGlyph& glyph) { |
| 1200 | sk_bzero(glyph.fImage, glyph.rowBytes() * glyph.fHeight); |
| 1201 | } |
reed@google.com | ea2333d | 2011-03-14 16:44:56 +0000 | [diff] [blame] | 1202 | |
bungeman@google.com | a76de72 | 2012-10-26 19:35:54 +0000 | [diff] [blame] | 1203 | void SkScalerContext_FreeType::generateImage(const SkGlyph& glyph) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1204 | SkAutoMutexAcquire ac(gFTMutex); |
| 1205 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1206 | if (this->setupSize()) { |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1207 | clear_glyph_image(glyph); |
| 1208 | return; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1209 | } |
| 1210 | |
bungeman | 5ec443c | 2014-11-21 13:18:34 -0800 | [diff] [blame] | 1211 | FT_Error err = FT_Load_Glyph(fFace, glyph.getGlyphID(), fLoadGlyphFlags); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1212 | if (err != 0) { |
| 1213 | 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] | 1214 | glyph.getGlyphID(), glyph.fWidth, glyph.fHeight, glyph.rowBytes(), fLoadGlyphFlags, err)); |
| 1215 | clear_glyph_image(glyph); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1216 | return; |
| 1217 | } |
| 1218 | |
Ben Wagner | c3aef18 | 2017-06-26 12:47:33 -0400 | [diff] [blame] | 1219 | emboldenIfNeeded(fFace, fFace->glyph, glyph.getGlyphID()); |
bungeman | 401ae2d | 2016-07-18 15:46:27 -0700 | [diff] [blame] | 1220 | SkMatrix* bitmapMatrix = &fMatrix22Scalar; |
| 1221 | SkMatrix subpixelBitmapMatrix; |
| 1222 | if (this->shouldSubpixelBitmap(glyph, *bitmapMatrix)) { |
| 1223 | subpixelBitmapMatrix = fMatrix22Scalar; |
| 1224 | subpixelBitmapMatrix.postTranslate(SkFixedToScalar(glyph.getSubXFixed()), |
| 1225 | SkFixedToScalar(glyph.getSubYFixed())); |
| 1226 | bitmapMatrix = &subpixelBitmapMatrix; |
| 1227 | } |
| 1228 | generateGlyphImage(fFace, glyph, *bitmapMatrix); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1229 | } |
| 1230 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1231 | |
Ben Wagner | 6e9ac12 | 2016-11-11 14:31:06 -0500 | [diff] [blame] | 1232 | void SkScalerContext_FreeType::generatePath(SkGlyphID glyphID, SkPath* path) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1233 | SkAutoMutexAcquire ac(gFTMutex); |
| 1234 | |
caryclark | a10742c | 2014-09-18 11:00:40 -0700 | [diff] [blame] | 1235 | SkASSERT(path); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1236 | |
| 1237 | if (this->setupSize()) { |
| 1238 | path->reset(); |
| 1239 | return; |
| 1240 | } |
| 1241 | |
| 1242 | uint32_t flags = fLoadGlyphFlags; |
| 1243 | flags |= FT_LOAD_NO_BITMAP; // ignore embedded bitmaps so we're sure to get the outline |
| 1244 | flags &= ~FT_LOAD_RENDER; // don't scan convert (we just want the outline) |
| 1245 | |
Ben Wagner | 6e9ac12 | 2016-11-11 14:31:06 -0500 | [diff] [blame] | 1246 | FT_Error err = FT_Load_Glyph(fFace, glyphID, flags); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1247 | |
| 1248 | if (err != 0) { |
| 1249 | SkDEBUGF(("SkScalerContext_FreeType::generatePath: FT_Load_Glyph(glyph:%d flags:%d) returned 0x%x\n", |
Ben Wagner | 6e9ac12 | 2016-11-11 14:31:06 -0500 | [diff] [blame] | 1250 | glyphID, flags, err)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1251 | path->reset(); |
| 1252 | return; |
| 1253 | } |
Ben Wagner | c3aef18 | 2017-06-26 12:47:33 -0400 | [diff] [blame] | 1254 | emboldenIfNeeded(fFace, fFace->glyph, glyphID); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1255 | |
sugoi@google.com | 66a58ac | 2013-03-05 20:40:52 +0000 | [diff] [blame] | 1256 | generateGlyphPath(fFace, path); |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1257 | |
| 1258 | // The path's origin from FreeType is always the horizontal layout origin. |
| 1259 | // Offset the path so that it is relative to the vertical origin if needed. |
| 1260 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 1261 | FT_Vector vector; |
| 1262 | vector.x = fFace->glyph->metrics.vertBearingX - fFace->glyph->metrics.horiBearingX; |
| 1263 | vector.y = -fFace->glyph->metrics.vertBearingY - fFace->glyph->metrics.horiBearingY; |
| 1264 | FT_Vector_Transform(&vector, &fMatrix22); |
| 1265 | path->offset(SkFDot6ToScalar(vector.x), -SkFDot6ToScalar(vector.y)); |
| 1266 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1267 | } |
| 1268 | |
bungeman | 4107806 | 2014-07-07 08:16:37 -0700 | [diff] [blame] | 1269 | void SkScalerContext_FreeType::generateFontMetrics(SkPaint::FontMetrics* metrics) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1270 | if (nullptr == metrics) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1271 | return; |
| 1272 | } |
| 1273 | |
bungeman | 4107806 | 2014-07-07 08:16:37 -0700 | [diff] [blame] | 1274 | SkAutoMutexAcquire ac(gFTMutex); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1275 | |
| 1276 | if (this->setupSize()) { |
bungeman | 4107806 | 2014-07-07 08:16:37 -0700 | [diff] [blame] | 1277 | sk_bzero(metrics, sizeof(*metrics)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1278 | return; |
| 1279 | } |
| 1280 | |
reed@android.com | a8a8b8b | 2009-05-04 15:00:11 +0000 | [diff] [blame] | 1281 | FT_Face face = fFace; |
Ben Wagner | 219f362 | 2017-07-17 15:32:25 -0400 | [diff] [blame] | 1282 | metrics->fFlags = 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1283 | |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1284 | // fetch units/EM from "head" table if needed (ie for bitmap fonts) |
| 1285 | SkScalar upem = SkIntToScalar(face->units_per_EM); |
| 1286 | if (!upem) { |
| 1287 | TT_Header* ttHeader = (TT_Header*)FT_Get_Sfnt_Table(face, ft_sfnt_head); |
| 1288 | if (ttHeader) { |
| 1289 | upem = SkIntToScalar(ttHeader->Units_Per_EM); |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 1290 | } |
| 1291 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1292 | |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1293 | // use the os/2 table as a source of reasonable defaults. |
| 1294 | SkScalar x_height = 0.0f; |
| 1295 | SkScalar avgCharWidth = 0.0f; |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1296 | SkScalar cap_height = 0.0f; |
Ben Wagner | 219f362 | 2017-07-17 15:32:25 -0400 | [diff] [blame] | 1297 | SkScalar strikeoutThickness, strikeoutPosition; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1298 | TT_OS2* os2 = (TT_OS2*) FT_Get_Sfnt_Table(face, ft_sfnt_os2); |
| 1299 | if (os2) { |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1300 | x_height = SkIntToScalar(os2->sxHeight) / upem * fScale.y(); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1301 | avgCharWidth = SkIntToScalar(os2->xAvgCharWidth) / upem; |
Ben Wagner | 219f362 | 2017-07-17 15:32:25 -0400 | [diff] [blame] | 1302 | strikeoutThickness = SkIntToScalar(os2->yStrikeoutSize) / upem; |
| 1303 | strikeoutPosition = -SkIntToScalar(os2->yStrikeoutPosition) / upem; |
| 1304 | metrics->fFlags |= SkPaint::FontMetrics::kStrikeoutThicknessIsValid_Flag; |
| 1305 | metrics->fFlags |= SkPaint::FontMetrics::kStrikeoutPositionIsValid_Flag; |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1306 | if (os2->version != 0xFFFF && os2->version >= 2) { |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1307 | cap_height = SkIntToScalar(os2->sCapHeight) / upem * fScale.y(); |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1308 | } |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1309 | } |
| 1310 | |
| 1311 | // pull from format-specific metrics as needed |
| 1312 | SkScalar ascent, descent, leading, xmin, xmax, ymin, ymax; |
commit-bot@chromium.org | 0bc406d | 2014-03-01 20:12:26 +0000 | [diff] [blame] | 1313 | SkScalar underlineThickness, underlinePosition; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1314 | if (face->face_flags & FT_FACE_FLAG_SCALABLE) { // scalable outline font |
bungeman | 665b038 | 2015-03-19 10:43:57 -0700 | [diff] [blame] | 1315 | // FreeType will always use HHEA metrics if they're not zero. |
| 1316 | // It completely ignores the OS/2 fsSelection::UseTypoMetrics bit. |
| 1317 | // It also ignores the VDMX tables, which are also of interest here |
| 1318 | // (and override everything else when they apply). |
| 1319 | static const int kUseTypoMetricsMask = (1 << 7); |
| 1320 | if (os2 && os2->version != 0xFFFF && (os2->fsSelection & kUseTypoMetricsMask)) { |
| 1321 | ascent = -SkIntToScalar(os2->sTypoAscender) / upem; |
| 1322 | descent = -SkIntToScalar(os2->sTypoDescender) / upem; |
| 1323 | leading = SkIntToScalar(os2->sTypoLineGap) / upem; |
| 1324 | } else { |
| 1325 | ascent = -SkIntToScalar(face->ascender) / upem; |
| 1326 | descent = -SkIntToScalar(face->descender) / upem; |
| 1327 | leading = SkIntToScalar(face->height + (face->descender - face->ascender)) / upem; |
| 1328 | } |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1329 | xmin = SkIntToScalar(face->bbox.xMin) / upem; |
| 1330 | xmax = SkIntToScalar(face->bbox.xMax) / upem; |
| 1331 | ymin = -SkIntToScalar(face->bbox.yMin) / upem; |
| 1332 | ymax = -SkIntToScalar(face->bbox.yMax) / upem; |
commit-bot@chromium.org | 0bc406d | 2014-03-01 20:12:26 +0000 | [diff] [blame] | 1333 | underlineThickness = SkIntToScalar(face->underline_thickness) / upem; |
commit-bot@chromium.org | d3031aa | 2014-05-14 14:54:51 +0000 | [diff] [blame] | 1334 | underlinePosition = -SkIntToScalar(face->underline_position + |
| 1335 | face->underline_thickness / 2) / upem; |
commit-bot@chromium.org | 0bc406d | 2014-03-01 20:12:26 +0000 | [diff] [blame] | 1336 | |
Ben Wagner | 3318da5 | 2017-03-23 14:01:22 -0400 | [diff] [blame] | 1337 | metrics->fFlags |= SkPaint::FontMetrics::kUnderlineThicknessIsValid_Flag; |
bungeman | 4107806 | 2014-07-07 08:16:37 -0700 | [diff] [blame] | 1338 | metrics->fFlags |= SkPaint::FontMetrics::kUnderlinePositionIsValid_Flag; |
| 1339 | |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1340 | // 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] | 1341 | if (!x_height) { |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1342 | FT_BBox bbox; |
| 1343 | if (getCBoxForLetter('x', &bbox)) { |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1344 | x_height = SkIntToScalar(bbox.yMax) / 64.0f; |
| 1345 | } |
| 1346 | } |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1347 | if (!cap_height) { |
| 1348 | FT_BBox bbox; |
| 1349 | if (getCBoxForLetter('H', &bbox)) { |
| 1350 | cap_height = SkIntToScalar(bbox.yMax) / 64.0f; |
| 1351 | } |
| 1352 | } |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1353 | } else if (fStrikeIndex != -1) { // bitmap strike metrics |
| 1354 | SkScalar xppem = SkIntToScalar(face->size->metrics.x_ppem); |
| 1355 | SkScalar yppem = SkIntToScalar(face->size->metrics.y_ppem); |
| 1356 | ascent = -SkIntToScalar(face->size->metrics.ascender) / (yppem * 64.0f); |
| 1357 | descent = -SkIntToScalar(face->size->metrics.descender) / (yppem * 64.0f); |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1358 | leading = (SkIntToScalar(face->size->metrics.height) / (yppem * 64.0f)) + ascent - descent; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1359 | xmin = 0.0f; |
| 1360 | xmax = SkIntToScalar(face->available_sizes[fStrikeIndex].width) / xppem; |
| 1361 | ymin = descent + leading; |
| 1362 | ymax = ascent - descent; |
commit-bot@chromium.org | 0bc406d | 2014-03-01 20:12:26 +0000 | [diff] [blame] | 1363 | underlineThickness = 0; |
| 1364 | underlinePosition = 0; |
| 1365 | |
Ben Wagner | 3318da5 | 2017-03-23 14:01:22 -0400 | [diff] [blame] | 1366 | metrics->fFlags &= ~SkPaint::FontMetrics::kUnderlineThicknessIsValid_Flag; |
bungeman | 4107806 | 2014-07-07 08:16:37 -0700 | [diff] [blame] | 1367 | metrics->fFlags &= ~SkPaint::FontMetrics::kUnderlinePositionIsValid_Flag; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1368 | } else { |
caryclark | fe7ada7 | 2016-03-21 06:55:52 -0700 | [diff] [blame] | 1369 | sk_bzero(metrics, sizeof(*metrics)); |
| 1370 | return; |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1371 | } |
| 1372 | |
| 1373 | // synthesize elements that were not provided by the os/2 table or format-specific metrics |
| 1374 | if (!x_height) { |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1375 | x_height = -ascent * fScale.y(); |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1376 | } |
| 1377 | if (!avgCharWidth) { |
| 1378 | avgCharWidth = xmax - xmin; |
| 1379 | } |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1380 | if (!cap_height) { |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1381 | cap_height = -ascent * fScale.y(); |
bungeman@google.com | cbe1b54 | 2013-12-16 17:02:39 +0000 | [diff] [blame] | 1382 | } |
bungeman@google.com | c9a8a7e | 2013-12-10 18:09:36 +0000 | [diff] [blame] | 1383 | |
| 1384 | // disallow negative linespacing |
| 1385 | if (leading < 0.0f) { |
| 1386 | leading = 0.0f; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1387 | } |
| 1388 | |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1389 | metrics->fTop = ymax * fScale.y(); |
| 1390 | metrics->fAscent = ascent * fScale.y(); |
| 1391 | metrics->fDescent = descent * fScale.y(); |
| 1392 | metrics->fBottom = ymin * fScale.y(); |
| 1393 | metrics->fLeading = leading * fScale.y(); |
| 1394 | metrics->fAvgCharWidth = avgCharWidth * fScale.y(); |
| 1395 | metrics->fXMin = xmin * fScale.y(); |
| 1396 | metrics->fXMax = xmax * fScale.y(); |
Ben Wagner | 219f362 | 2017-07-17 15:32:25 -0400 | [diff] [blame] | 1397 | metrics->fMaxCharWidth = metrics->fXMax - metrics->fXMin; |
bungeman | 7316b10 | 2014-10-29 12:46:52 -0700 | [diff] [blame] | 1398 | metrics->fXHeight = x_height; |
| 1399 | metrics->fCapHeight = cap_height; |
bungeman | 5379051 | 2016-07-21 13:32:09 -0700 | [diff] [blame] | 1400 | metrics->fUnderlineThickness = underlineThickness * fScale.y(); |
| 1401 | metrics->fUnderlinePosition = underlinePosition * fScale.y(); |
Ben Wagner | 219f362 | 2017-07-17 15:32:25 -0400 | [diff] [blame] | 1402 | metrics->fStrikeoutThickness = strikeoutThickness * fScale.y(); |
| 1403 | metrics->fStrikeoutPosition = strikeoutPosition * fScale.y(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1404 | } |
| 1405 | |
djsollen | fcfea99 | 2015-01-09 08:18:13 -0800 | [diff] [blame] | 1406 | /////////////////////////////////////////////////////////////////////////////// |
| 1407 | |
| 1408 | // hand-tuned value to reduce outline embolden strength |
| 1409 | #ifndef SK_OUTLINE_EMBOLDEN_DIVISOR |
| 1410 | #ifdef SK_BUILD_FOR_ANDROID_FRAMEWORK |
| 1411 | #define SK_OUTLINE_EMBOLDEN_DIVISOR 34 |
| 1412 | #else |
| 1413 | #define SK_OUTLINE_EMBOLDEN_DIVISOR 24 |
| 1414 | #endif |
| 1415 | #endif |
| 1416 | |
| 1417 | /////////////////////////////////////////////////////////////////////////////// |
| 1418 | |
Ben Wagner | c3aef18 | 2017-06-26 12:47:33 -0400 | [diff] [blame] | 1419 | void SkScalerContext_FreeType::emboldenIfNeeded(FT_Face face, FT_GlyphSlot glyph, SkGlyphID gid) { |
commit-bot@chromium.org | 921d2b3 | 2014-04-01 19:03:07 +0000 | [diff] [blame] | 1420 | // check to see if the embolden bit is set |
| 1421 | if (0 == (fRec.fFlags & SkScalerContext::kEmbolden_Flag)) { |
| 1422 | return; |
| 1423 | } |
| 1424 | |
commit-bot@chromium.org | 921d2b3 | 2014-04-01 19:03:07 +0000 | [diff] [blame] | 1425 | switch (glyph->format) { |
| 1426 | case FT_GLYPH_FORMAT_OUTLINE: |
| 1427 | FT_Pos strength; |
djsollen | fcfea99 | 2015-01-09 08:18:13 -0800 | [diff] [blame] | 1428 | strength = FT_MulFix(face->units_per_EM, face->size->metrics.y_scale) |
| 1429 | / SK_OUTLINE_EMBOLDEN_DIVISOR; |
commit-bot@chromium.org | 921d2b3 | 2014-04-01 19:03:07 +0000 | [diff] [blame] | 1430 | FT_Outline_Embolden(&glyph->outline, strength); |
| 1431 | break; |
| 1432 | case FT_GLYPH_FORMAT_BITMAP: |
Ben Wagner | c3aef18 | 2017-06-26 12:47:33 -0400 | [diff] [blame] | 1433 | if (!fFace->glyph->bitmap.buffer) { |
| 1434 | FT_Load_Glyph(fFace, gid, fLoadGlyphFlags); |
| 1435 | } |
commit-bot@chromium.org | 921d2b3 | 2014-04-01 19:03:07 +0000 | [diff] [blame] | 1436 | FT_GlyphSlot_Own_Bitmap(glyph); |
| 1437 | FT_Bitmap_Embolden(glyph->library, &glyph->bitmap, kBitmapEmboldenStrength, 0); |
| 1438 | break; |
| 1439 | default: |
| 1440 | SkDEBUGFAIL("unknown glyph format"); |
commit-bot@chromium.org | 6fa81d7 | 2013-12-26 15:50:29 +0000 | [diff] [blame] | 1441 | } |
| 1442 | } |
| 1443 | |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 1444 | /////////////////////////////////////////////////////////////////////////////// |
| 1445 | |
| 1446 | #include "SkUtils.h" |
| 1447 | |
| 1448 | static SkUnichar next_utf8(const void** chars) { |
| 1449 | return SkUTF8_NextUnichar((const char**)chars); |
| 1450 | } |
| 1451 | |
| 1452 | static SkUnichar next_utf16(const void** chars) { |
| 1453 | return SkUTF16_NextUnichar((const uint16_t**)chars); |
| 1454 | } |
| 1455 | |
| 1456 | static SkUnichar next_utf32(const void** chars) { |
| 1457 | const SkUnichar** uniChars = (const SkUnichar**)chars; |
| 1458 | SkUnichar uni = **uniChars; |
| 1459 | *uniChars += 1; |
| 1460 | return uni; |
| 1461 | } |
| 1462 | |
| 1463 | typedef SkUnichar (*EncodingProc)(const void**); |
| 1464 | |
| 1465 | static EncodingProc find_encoding_proc(SkTypeface::Encoding enc) { |
| 1466 | static const EncodingProc gProcs[] = { |
| 1467 | next_utf8, next_utf16, next_utf32 |
| 1468 | }; |
| 1469 | SkASSERT((size_t)enc < SK_ARRAY_COUNT(gProcs)); |
| 1470 | return gProcs[enc]; |
| 1471 | } |
| 1472 | |
| 1473 | int SkTypeface_FreeType::onCharsToGlyphs(const void* chars, Encoding encoding, |
bungeman | 726cf90 | 2015-06-05 13:38:12 -0700 | [diff] [blame] | 1474 | uint16_t glyphs[], int glyphCount) const |
| 1475 | { |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 1476 | AutoFTAccess fta(this); |
| 1477 | FT_Face face = fta.face(); |
| 1478 | if (!face) { |
| 1479 | if (glyphs) { |
| 1480 | sk_bzero(glyphs, glyphCount * sizeof(glyphs[0])); |
| 1481 | } |
| 1482 | return 0; |
| 1483 | } |
| 1484 | |
| 1485 | EncodingProc next_uni_proc = find_encoding_proc(encoding); |
| 1486 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1487 | if (nullptr == glyphs) { |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 1488 | for (int i = 0; i < glyphCount; ++i) { |
| 1489 | if (0 == FT_Get_Char_Index(face, next_uni_proc(&chars))) { |
| 1490 | return i; |
| 1491 | } |
| 1492 | } |
| 1493 | return glyphCount; |
| 1494 | } else { |
| 1495 | int first = glyphCount; |
| 1496 | for (int i = 0; i < glyphCount; ++i) { |
| 1497 | unsigned id = FT_Get_Char_Index(face, next_uni_proc(&chars)); |
| 1498 | glyphs[i] = SkToU16(id); |
| 1499 | if (0 == id && i < first) { |
| 1500 | first = i; |
| 1501 | } |
| 1502 | } |
| 1503 | return first; |
| 1504 | } |
| 1505 | } |
| 1506 | |
| 1507 | int SkTypeface_FreeType::onCountGlyphs() const { |
bungeman | 572f879 | 2016-04-29 15:05:02 -0700 | [diff] [blame] | 1508 | AutoFTAccess fta(this); |
| 1509 | FT_Face face = fta.face(); |
| 1510 | return face ? face->num_glyphs : 0; |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 1511 | } |
| 1512 | |
bungeman@google.com | 839702b | 2013-08-07 17:09:22 +0000 | [diff] [blame] | 1513 | SkTypeface::LocalizedStrings* SkTypeface_FreeType::onCreateFamilyNameIterator() const { |
bungeman@google.com | a980269 | 2013-08-07 02:45:25 +0000 | [diff] [blame] | 1514 | SkTypeface::LocalizedStrings* nameIter = |
| 1515 | SkOTUtils::LocalizedStrings_NameTable::CreateForFamilyNames(*this); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1516 | if (nullptr == nameIter) { |
bungeman@google.com | a980269 | 2013-08-07 02:45:25 +0000 | [diff] [blame] | 1517 | SkString familyName; |
| 1518 | this->getFamilyName(&familyName); |
| 1519 | SkString language("und"); //undetermined |
| 1520 | nameIter = new SkOTUtils::LocalizedStrings_SingleName(familyName, language); |
| 1521 | } |
| 1522 | return nameIter; |
| 1523 | } |
| 1524 | |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 1525 | int SkTypeface_FreeType::onGetVariationDesignPosition( |
| 1526 | SkFontArguments::VariationPosition::Coordinate coordinates[], int coordinateCount) const |
| 1527 | { |
| 1528 | AutoFTAccess fta(this); |
| 1529 | FT_Face face = fta.face(); |
| 1530 | |
Ben Wagner | e7e5499 | 2017-03-02 11:48:38 -0500 | [diff] [blame] | 1531 | if (!face || !(face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS)) { |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 1532 | return 0; |
| 1533 | } |
| 1534 | |
| 1535 | FT_MM_Var* variations = nullptr; |
| 1536 | if (FT_Get_MM_Var(face, &variations)) { |
| 1537 | return 0; |
| 1538 | } |
| 1539 | SkAutoFree autoFreeVariations(variations); |
| 1540 | |
| 1541 | if (!coordinates || coordinateCount < SkToInt(variations->num_axis)) { |
| 1542 | return variations->num_axis; |
| 1543 | } |
| 1544 | |
| 1545 | SkAutoSTMalloc<4, FT_Fixed> coords(variations->num_axis); |
| 1546 | // FT_Get_{MM,Var}_{Blend,Design}_Coordinates were added in FreeType 2.7.1. |
| 1547 | if (gFTLibrary->fGetVarDesignCoordinates && |
| 1548 | !gFTLibrary->fGetVarDesignCoordinates(face, variations->num_axis, coords.get())) |
| 1549 | { |
| 1550 | for (FT_UInt i = 0; i < variations->num_axis; ++i) { |
| 1551 | coordinates[i].axis = variations->axis[i].tag; |
| 1552 | coordinates[i].value = SkFixedToScalar(coords[i]); |
| 1553 | } |
| 1554 | } else if (static_cast<FT_UInt>(fta.getAxesCount()) == variations->num_axis) { |
| 1555 | for (FT_UInt i = 0; i < variations->num_axis; ++i) { |
| 1556 | coordinates[i].axis = variations->axis[i].tag; |
| 1557 | coordinates[i].value = SkFixedToScalar(fta.getAxes()[i]); |
| 1558 | } |
| 1559 | } else if (fta.isNamedVariationSpecified()) { |
| 1560 | // The font has axes, they cannot be retrieved, and some named axis was specified. |
| 1561 | return -1; |
| 1562 | } else { |
| 1563 | // The font has axes, they cannot be retrieved, but no named instance was specified. |
| 1564 | return 0; |
| 1565 | } |
| 1566 | |
| 1567 | return variations->num_axis; |
| 1568 | } |
| 1569 | |
bungeman@google.com | ddc218e | 2013-08-01 22:29:43 +0000 | [diff] [blame] | 1570 | int SkTypeface_FreeType::onGetTableTags(SkFontTableTag tags[]) const { |
| 1571 | AutoFTAccess fta(this); |
| 1572 | FT_Face face = fta.face(); |
| 1573 | |
| 1574 | FT_ULong tableCount = 0; |
| 1575 | FT_Error error; |
| 1576 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1577 | // When 'tag' is nullptr, returns number of tables in 'length'. |
| 1578 | error = FT_Sfnt_Table_Info(face, 0, nullptr, &tableCount); |
bungeman@google.com | ddc218e | 2013-08-01 22:29:43 +0000 | [diff] [blame] | 1579 | if (error) { |
| 1580 | return 0; |
| 1581 | } |
| 1582 | |
| 1583 | if (tags) { |
| 1584 | for (FT_ULong tableIndex = 0; tableIndex < tableCount; ++tableIndex) { |
| 1585 | FT_ULong tableTag; |
| 1586 | FT_ULong tablelength; |
| 1587 | error = FT_Sfnt_Table_Info(face, tableIndex, &tableTag, &tablelength); |
| 1588 | if (error) { |
| 1589 | return 0; |
| 1590 | } |
| 1591 | tags[tableIndex] = static_cast<SkFontTableTag>(tableTag); |
| 1592 | } |
| 1593 | } |
| 1594 | return tableCount; |
| 1595 | } |
| 1596 | |
| 1597 | size_t SkTypeface_FreeType::onGetTableData(SkFontTableTag tag, size_t offset, |
| 1598 | size_t length, void* data) const |
| 1599 | { |
| 1600 | AutoFTAccess fta(this); |
| 1601 | FT_Face face = fta.face(); |
| 1602 | |
| 1603 | FT_ULong tableLength = 0; |
| 1604 | FT_Error error; |
| 1605 | |
| 1606 | // 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] | 1607 | error = FT_Load_Sfnt_Table(face, tag, 0, nullptr, &tableLength); |
bungeman@google.com | ddc218e | 2013-08-01 22:29:43 +0000 | [diff] [blame] | 1608 | if (error) { |
| 1609 | return 0; |
| 1610 | } |
| 1611 | |
| 1612 | if (offset > tableLength) { |
| 1613 | return 0; |
| 1614 | } |
bungeman@google.com | 5ecd4fa | 2013-08-01 22:48:21 +0000 | [diff] [blame] | 1615 | FT_ULong size = SkTMin((FT_ULong)length, tableLength - (FT_ULong)offset); |
bsalomon | 49f085d | 2014-09-05 13:34:00 -0700 | [diff] [blame] | 1616 | if (data) { |
bungeman@google.com | ddc218e | 2013-08-01 22:29:43 +0000 | [diff] [blame] | 1617 | error = FT_Load_Sfnt_Table(face, tag, offset, reinterpret_cast<FT_Byte*>(data), &size); |
| 1618 | if (error) { |
| 1619 | return 0; |
| 1620 | } |
| 1621 | } |
| 1622 | |
| 1623 | return size; |
| 1624 | } |
| 1625 | |
reed@google.com | b4162b1 | 2013-07-02 16:32:29 +0000 | [diff] [blame] | 1626 | /////////////////////////////////////////////////////////////////////////////// |
| 1627 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1628 | |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1629 | SkTypeface_FreeType::Scanner::Scanner() : fLibrary(nullptr) { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 1630 | if (FT_New_Library(&gFTMemory, &fLibrary)) { |
| 1631 | return; |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1632 | } |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 1633 | FT_Add_Default_Modules(fLibrary); |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1634 | } |
| 1635 | SkTypeface_FreeType::Scanner::~Scanner() { |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 1636 | if (fLibrary) { |
| 1637 | FT_Done_Library(fLibrary); |
| 1638 | } |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1639 | } |
| 1640 | |
bungeman | f93d711 | 2016-09-16 06:24:20 -0700 | [diff] [blame] | 1641 | FT_Face SkTypeface_FreeType::Scanner::openFace(SkStreamAsset* stream, int ttcIndex, |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1642 | FT_Stream ftStream) const |
bungeman | 32501a1 | 2014-10-28 12:03:55 -0700 | [diff] [blame] | 1643 | { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1644 | if (fLibrary == nullptr) { |
| 1645 | return nullptr; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1646 | } |
| 1647 | |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1648 | FT_Open_Args args; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1649 | memset(&args, 0, sizeof(args)); |
| 1650 | |
| 1651 | const void* memoryBase = stream->getMemoryBase(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1652 | |
bsalomon | 49f085d | 2014-09-05 13:34:00 -0700 | [diff] [blame] | 1653 | if (memoryBase) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1654 | args.flags = FT_OPEN_MEMORY; |
| 1655 | args.memory_base = (const FT_Byte*)memoryBase; |
| 1656 | args.memory_size = stream->getLength(); |
| 1657 | } else { |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1658 | memset(ftStream, 0, sizeof(*ftStream)); |
| 1659 | ftStream->size = stream->getLength(); |
| 1660 | ftStream->descriptor.pointer = stream; |
bungeman | 9dc2468 | 2014-12-01 14:01:32 -0800 | [diff] [blame] | 1661 | ftStream->read = sk_ft_stream_io; |
| 1662 | ftStream->close = sk_ft_stream_close; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1663 | |
| 1664 | args.flags = FT_OPEN_STREAM; |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1665 | args.stream = ftStream; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1666 | } |
| 1667 | |
| 1668 | FT_Face face; |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1669 | if (FT_Open_Face(fLibrary, &args, ttcIndex, &face)) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1670 | return nullptr; |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1671 | } |
| 1672 | return face; |
| 1673 | } |
| 1674 | |
bungeman | f93d711 | 2016-09-16 06:24:20 -0700 | [diff] [blame] | 1675 | bool SkTypeface_FreeType::Scanner::recognizedFont(SkStreamAsset* stream, int* numFaces) const { |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1676 | SkAutoMutexAcquire libraryLock(fLibraryMutex); |
| 1677 | |
| 1678 | FT_StreamRec streamRec; |
| 1679 | FT_Face face = this->openFace(stream, -1, &streamRec); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1680 | if (nullptr == face) { |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1681 | return false; |
| 1682 | } |
| 1683 | |
| 1684 | *numFaces = face->num_faces; |
| 1685 | |
| 1686 | FT_Done_Face(face); |
| 1687 | return true; |
| 1688 | } |
| 1689 | |
| 1690 | #include "SkTSearch.h" |
| 1691 | bool SkTypeface_FreeType::Scanner::scanFont( |
bungeman | f93d711 | 2016-09-16 06:24:20 -0700 | [diff] [blame] | 1692 | SkStreamAsset* stream, int ttcIndex, |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 1693 | SkString* name, SkFontStyle* style, bool* isFixedPitch, AxisDefinitions* axes) const |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1694 | { |
| 1695 | SkAutoMutexAcquire libraryLock(fLibraryMutex); |
| 1696 | |
| 1697 | FT_StreamRec streamRec; |
| 1698 | FT_Face face = this->openFace(stream, ttcIndex, &streamRec); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1699 | if (nullptr == face) { |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1700 | return false; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1701 | } |
| 1702 | |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1703 | int weight = SkFontStyle::kNormal_Weight; |
| 1704 | int width = SkFontStyle::kNormal_Width; |
| 1705 | SkFontStyle::Slant slant = SkFontStyle::kUpright_Slant; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1706 | if (face->style_flags & FT_STYLE_FLAG_BOLD) { |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1707 | weight = SkFontStyle::kBold_Weight; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1708 | } |
| 1709 | if (face->style_flags & FT_STYLE_FLAG_ITALIC) { |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1710 | slant = SkFontStyle::kItalic_Slant; |
| 1711 | } |
| 1712 | |
| 1713 | PS_FontInfoRec psFontInfo; |
| 1714 | TT_OS2* os2 = static_cast<TT_OS2*>(FT_Get_Sfnt_Table(face, ft_sfnt_os2)); |
| 1715 | if (os2 && os2->version != 0xffff) { |
| 1716 | weight = os2->usWeightClass; |
| 1717 | width = os2->usWidthClass; |
bungeman | b4bb7d8 | 2016-04-27 10:21:04 -0700 | [diff] [blame] | 1718 | |
| 1719 | // OS/2::fsSelection bit 9 indicates oblique. |
| 1720 | if (SkToBool(os2->fsSelection & (1u << 9))) { |
| 1721 | slant = SkFontStyle::kOblique_Slant; |
| 1722 | } |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1723 | } else if (0 == FT_Get_PS_Font_Info(face, &psFontInfo) && psFontInfo.weight) { |
| 1724 | static const struct { |
| 1725 | char const * const name; |
| 1726 | int const weight; |
| 1727 | } commonWeights [] = { |
| 1728 | // There are probably more common names, but these are known to exist. |
bungeman | d803cda | 2015-04-16 14:22:46 -0700 | [diff] [blame] | 1729 | { "all", SkFontStyle::kNormal_Weight }, // Multiple Masters usually default to normal. |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1730 | { "black", SkFontStyle::kBlack_Weight }, |
| 1731 | { "bold", SkFontStyle::kBold_Weight }, |
| 1732 | { "book", (SkFontStyle::kNormal_Weight + SkFontStyle::kLight_Weight)/2 }, |
| 1733 | { "demi", SkFontStyle::kSemiBold_Weight }, |
| 1734 | { "demibold", SkFontStyle::kSemiBold_Weight }, |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1735 | { "extra", SkFontStyle::kExtraBold_Weight }, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1736 | { "extrabold", SkFontStyle::kExtraBold_Weight }, |
| 1737 | { "extralight", SkFontStyle::kExtraLight_Weight }, |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1738 | { "hairline", SkFontStyle::kThin_Weight }, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1739 | { "heavy", SkFontStyle::kBlack_Weight }, |
| 1740 | { "light", SkFontStyle::kLight_Weight }, |
| 1741 | { "medium", SkFontStyle::kMedium_Weight }, |
| 1742 | { "normal", SkFontStyle::kNormal_Weight }, |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1743 | { "plain", SkFontStyle::kNormal_Weight }, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1744 | { "regular", SkFontStyle::kNormal_Weight }, |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1745 | { "roman", SkFontStyle::kNormal_Weight }, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1746 | { "semibold", SkFontStyle::kSemiBold_Weight }, |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1747 | { "standard", SkFontStyle::kNormal_Weight }, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1748 | { "thin", SkFontStyle::kThin_Weight }, |
| 1749 | { "ultra", SkFontStyle::kExtraBold_Weight }, |
bungeman | 6e45bda | 2016-07-25 15:11:49 -0700 | [diff] [blame] | 1750 | { "ultrablack", SkFontStyle::kExtraBlack_Weight }, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1751 | { "ultrabold", SkFontStyle::kExtraBold_Weight }, |
bungeman | 6e45bda | 2016-07-25 15:11:49 -0700 | [diff] [blame] | 1752 | { "ultraheavy", SkFontStyle::kExtraBlack_Weight }, |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1753 | { "ultralight", SkFontStyle::kExtraLight_Weight }, |
| 1754 | }; |
| 1755 | int const index = SkStrLCSearch(&commonWeights[0].name, SK_ARRAY_COUNT(commonWeights), |
bungeman | d2ae728 | 2014-10-22 08:25:44 -0700 | [diff] [blame] | 1756 | psFontInfo.weight, sizeof(commonWeights[0])); |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1757 | if (index >= 0) { |
| 1758 | weight = commonWeights[index].weight; |
| 1759 | } else { |
bungeman | 14df833 | 2014-10-28 15:07:23 -0700 | [diff] [blame] | 1760 | 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] | 1761 | } |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1762 | } |
| 1763 | |
| 1764 | if (name) { |
| 1765 | name->set(face->family_name); |
| 1766 | } |
| 1767 | if (style) { |
bungeman | a4c4a2d | 2014-10-20 13:33:19 -0700 | [diff] [blame] | 1768 | *style = SkFontStyle(weight, width, slant); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1769 | } |
bungeman@google.com | fe74765 | 2013-03-25 19:36:11 +0000 | [diff] [blame] | 1770 | if (isFixedPitch) { |
| 1771 | *isFixedPitch = FT_IS_FIXED_WIDTH(face); |
reed@google.com | 5b31b0f | 2011-02-23 14:41:42 +0000 | [diff] [blame] | 1772 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1773 | |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 1774 | if (axes && face->face_flags & FT_FACE_FLAG_MULTIPLE_MASTERS) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 1775 | FT_MM_Var* variations = nullptr; |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 1776 | FT_Error err = FT_Get_MM_Var(face, &variations); |
| 1777 | if (err) { |
| 1778 | SkDEBUGF(("INFO: font %s claims to have variations, but none found.\n", |
| 1779 | face->family_name)); |
| 1780 | return false; |
| 1781 | } |
| 1782 | SkAutoFree autoFreeVariations(variations); |
| 1783 | |
| 1784 | axes->reset(variations->num_axis); |
| 1785 | for (FT_UInt i = 0; i < variations->num_axis; ++i) { |
| 1786 | const FT_Var_Axis& ftAxis = variations->axis[i]; |
| 1787 | (*axes)[i].fTag = ftAxis.tag; |
| 1788 | (*axes)[i].fMinimum = ftAxis.minimum; |
| 1789 | (*axes)[i].fDefault = ftAxis.def; |
| 1790 | (*axes)[i].fMaximum = ftAxis.maximum; |
| 1791 | } |
| 1792 | } |
bungeman | 41868fe | 2015-05-20 09:21:04 -0700 | [diff] [blame] | 1793 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1794 | FT_Done_Face(face); |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1795 | return true; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1796 | } |
bungeman | f6c7107 | 2016-01-21 14:17:47 -0800 | [diff] [blame] | 1797 | |
| 1798 | /*static*/ void SkTypeface_FreeType::Scanner::computeAxisValues( |
| 1799 | AxisDefinitions axisDefinitions, |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 1800 | const SkFontArguments::VariationPosition position, |
bungeman | f6c7107 | 2016-01-21 14:17:47 -0800 | [diff] [blame] | 1801 | SkFixed* axisValues, |
| 1802 | const SkString& name) |
| 1803 | { |
| 1804 | for (int i = 0; i < axisDefinitions.count(); ++i) { |
| 1805 | const Scanner::AxisDefinition& axisDefinition = axisDefinitions[i]; |
benjaminwagner | 64a3c95 | 2016-02-25 12:20:40 -0800 | [diff] [blame] | 1806 | const SkScalar axisMin = SkFixedToScalar(axisDefinition.fMinimum); |
| 1807 | const SkScalar axisMax = SkFixedToScalar(axisDefinition.fMaximum); |
bungeman | f6c7107 | 2016-01-21 14:17:47 -0800 | [diff] [blame] | 1808 | axisValues[i] = axisDefinition.fDefault; |
bungeman | 9aec894 | 2017-03-29 13:38:53 -0400 | [diff] [blame] | 1809 | // The position may be over specified. If there are multiple values for a given axis, |
| 1810 | // use the last one since that's what css-fonts-4 requires. |
| 1811 | for (int j = position.coordinateCount; j --> 0;) { |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 1812 | const auto& coordinate = position.coordinates[j]; |
| 1813 | if (axisDefinition.fTag == coordinate.axis) { |
| 1814 | const SkScalar axisValue = SkTPin(coordinate.value, axisMin, axisMax); |
| 1815 | if (coordinate.value != axisValue) { |
bungeman | f6c7107 | 2016-01-21 14:17:47 -0800 | [diff] [blame] | 1816 | SkDEBUGF(("Requested font axis value out of range: " |
| 1817 | "%s '%c%c%c%c' %f; pinned to %f.\n", |
| 1818 | name.c_str(), |
| 1819 | (axisDefinition.fTag >> 24) & 0xFF, |
| 1820 | (axisDefinition.fTag >> 16) & 0xFF, |
| 1821 | (axisDefinition.fTag >> 8) & 0xFF, |
| 1822 | (axisDefinition.fTag ) & 0xFF, |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 1823 | SkScalarToDouble(coordinate.value), |
benjaminwagner | 64a3c95 | 2016-02-25 12:20:40 -0800 | [diff] [blame] | 1824 | SkScalarToDouble(axisValue))); |
bungeman | f6c7107 | 2016-01-21 14:17:47 -0800 | [diff] [blame] | 1825 | } |
benjaminwagner | 64a3c95 | 2016-02-25 12:20:40 -0800 | [diff] [blame] | 1826 | axisValues[i] = SkScalarToFixed(axisValue); |
bungeman | f6c7107 | 2016-01-21 14:17:47 -0800 | [diff] [blame] | 1827 | break; |
| 1828 | } |
| 1829 | } |
| 1830 | // TODO: warn on defaulted axis? |
| 1831 | } |
| 1832 | |
| 1833 | SkDEBUGCODE( |
| 1834 | // Check for axis specified, but not matched in font. |
Ben Wagner | fc49734 | 2017-02-24 11:15:26 -0500 | [diff] [blame] | 1835 | for (int i = 0; i < position.coordinateCount; ++i) { |
| 1836 | SkFourByteTag skTag = position.coordinates[i].axis; |
bungeman | f6c7107 | 2016-01-21 14:17:47 -0800 | [diff] [blame] | 1837 | bool found = false; |
| 1838 | for (int j = 0; j < axisDefinitions.count(); ++j) { |
| 1839 | if (skTag == axisDefinitions[j].fTag) { |
| 1840 | found = true; |
| 1841 | break; |
| 1842 | } |
| 1843 | } |
| 1844 | if (!found) { |
| 1845 | SkDEBUGF(("Requested font axis not found: %s '%c%c%c%c'\n", |
| 1846 | name.c_str(), |
| 1847 | (skTag >> 24) & 0xFF, |
| 1848 | (skTag >> 16) & 0xFF, |
| 1849 | (skTag >> 8) & 0xFF, |
| 1850 | (skTag) & 0xFF)); |
| 1851 | } |
| 1852 | } |
| 1853 | ) |
| 1854 | } |