epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Copyright 2006 The Android Open Source Project |
| 4 | * |
| 5 | * Use of this source code is governed by a BSD-style license that can be |
| 6 | * found in the LICENSE file. |
| 7 | */ |
| 8 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 9 | #include "SkBitmap.h" |
| 10 | #include "SkCanvas.h" |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 11 | #include "SkColorPriv.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 12 | #include "SkDescriptor.h" |
| 13 | #include "SkFDot6.h" |
bungeman@google.com | 3aacb41 | 2012-03-13 14:55:12 +0000 | [diff] [blame] | 14 | #include "SkFloatingPoint.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 15 | #include "SkFontHost.h" |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 16 | #include "SkFontHost_FreeType_common.h" |
bungeman@google.com | bbe5013 | 2012-07-24 20:33:21 +0000 | [diff] [blame] | 17 | #include "SkGlyph.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" |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 20 | #include "SkAdvancedTypefaceMetrics.h" |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 21 | #include "SkScalerContext.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 22 | #include "SkStream.h" |
| 23 | #include "SkString.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 24 | #include "SkTemplates.h" |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 25 | #include "SkThread.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 26 | |
bungeman@google.com | fd668cf | 2012-08-24 17:46:11 +0000 | [diff] [blame] | 27 | #if defined(SK_CAN_USE_DLOPEN) |
| 28 | #include <dlfcn.h> |
| 29 | #endif |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 30 | #include <ft2build.h> |
| 31 | #include FT_FREETYPE_H |
| 32 | #include FT_OUTLINE_H |
| 33 | #include FT_SIZES_H |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 34 | #include FT_TRUETYPE_TABLES_H |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 35 | #include FT_TYPE1_TABLES_H |
agl@chromium.org | e76073b | 2010-06-04 20:31:17 +0000 | [diff] [blame] | 36 | #include FT_BITMAP_H |
agl@chromium.org | 36bb697 | 2010-06-04 20:57:16 +0000 | [diff] [blame] | 37 | // In the past, FT_GlyphSlot_Own_Bitmap was defined in this header file. |
| 38 | #include FT_SYNTHESIS_H |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 39 | #include FT_XFREE86_H |
epoger@google.com | 5070d79 | 2011-06-29 20:43:14 +0000 | [diff] [blame] | 40 | #ifdef FT_LCD_FILTER_H |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 41 | #include FT_LCD_FILTER_H |
epoger@google.com | 5070d79 | 2011-06-29 20:43:14 +0000 | [diff] [blame] | 42 | #endif |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 43 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 44 | #ifdef FT_ADVANCES_H |
| 45 | #include FT_ADVANCES_H |
| 46 | #endif |
| 47 | |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 48 | #if 0 |
| 49 | // Also include the files by name for build tools which require this. |
| 50 | #include <freetype/freetype.h> |
| 51 | #include <freetype/ftoutln.h> |
| 52 | #include <freetype/ftsizes.h> |
| 53 | #include <freetype/tttables.h> |
| 54 | #include <freetype/ftadvanc.h> |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 55 | #include <freetype/ftlcdfil.h> |
agl@chromium.org | e76073b | 2010-06-04 20:31:17 +0000 | [diff] [blame] | 56 | #include <freetype/ftbitmap.h> |
agl@chromium.org | 36bb697 | 2010-06-04 20:57:16 +0000 | [diff] [blame] | 57 | #include <freetype/ftsynth.h> |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 58 | #endif |
| 59 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 60 | //#define ENABLE_GLYPH_SPEW // for tracing calls |
| 61 | //#define DUMP_STRIKE_CREATION |
| 62 | |
reed@google.com | 1ac8350 | 2012-02-28 17:06:02 +0000 | [diff] [blame] | 63 | //#define SK_GAMMA_APPLY_TO_A8 |
reed@google.com | 1ac8350 | 2012-02-28 17:06:02 +0000 | [diff] [blame] | 64 | |
vandebo@chromium.org | 6f72d1e | 2011-02-14 23:19:59 +0000 | [diff] [blame] | 65 | using namespace skia_advanced_typeface_metrics_utils; |
| 66 | |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 67 | static bool isLCD(const SkScalerContext::Rec& rec) { |
| 68 | switch (rec.fMaskFormat) { |
| 69 | case SkMask::kLCD16_Format: |
| 70 | case SkMask::kLCD32_Format: |
| 71 | return true; |
| 72 | default: |
| 73 | return false; |
| 74 | } |
| 75 | } |
| 76 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 77 | ////////////////////////////////////////////////////////////////////////// |
| 78 | |
| 79 | struct SkFaceRec; |
| 80 | |
digit@google.com | 1771cbf | 2012-01-26 21:26:40 +0000 | [diff] [blame] | 81 | SK_DECLARE_STATIC_MUTEX(gFTMutex); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 82 | static int gFTCount; |
| 83 | static FT_Library gFTLibrary; |
| 84 | static SkFaceRec* gFaceRecHead; |
agl@chromium.org | f18d876 | 2009-07-28 18:38:08 +0000 | [diff] [blame] | 85 | static bool gLCDSupportValid; // true iff |gLCDSupport| has been set. |
| 86 | static bool gLCDSupport; // true iff LCD is supported by the runtime. |
reed@google.com | a1c3256 | 2012-03-01 19:38:23 +0000 | [diff] [blame] | 87 | static int gLCDExtra; // number of extra pixels for filtering. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 88 | |
bungeman@google.com | 62566f3 | 2012-10-13 03:21:53 +0000 | [diff] [blame] | 89 | ///////////////////////////////////////////////////////////////////////// |
| 90 | |
bungeman@google.com | fd668cf | 2012-08-24 17:46:11 +0000 | [diff] [blame] | 91 | // FT_Library_SetLcdFilterWeights was introduced in FreeType 2.4.0. |
| 92 | // The following platforms provide FreeType of at least 2.4.0. |
| 93 | // Ubuntu >= 11.04 (previous deprecated April 2013) |
| 94 | // Debian >= 6.0 (good) |
| 95 | // OpenSuse >= 11.4 (previous deprecated January 2012 / Nov 2013 for Evergreen 11.2) |
| 96 | // Fedora >= 14 (good) |
| 97 | // Android >= Gingerbread (good) |
| 98 | typedef FT_Error (*FT_Library_SetLcdFilterWeightsProc)(FT_Library, unsigned char*); |
| 99 | |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 100 | // Caller must lock gFTMutex before calling this function. |
bungeman@google.com | fd668cf | 2012-08-24 17:46:11 +0000 | [diff] [blame] | 101 | static bool InitFreetype() { |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 102 | FT_Error err = FT_Init_FreeType(&gFTLibrary); |
reed@google.com | ea2333d | 2011-03-14 16:44:56 +0000 | [diff] [blame] | 103 | if (err) { |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 104 | return false; |
reed@google.com | ea2333d | 2011-03-14 16:44:56 +0000 | [diff] [blame] | 105 | } |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 106 | |
bungeman@google.com | fd668cf | 2012-08-24 17:46:11 +0000 | [diff] [blame] | 107 | // Setup LCD filtering. This reduces color fringes for LCD smoothed glyphs. |
epoger@google.com | b371ed1 | 2011-06-29 21:20:52 +0000 | [diff] [blame] | 108 | #ifdef FT_LCD_FILTER_H |
bungeman@google.com | 62566f3 | 2012-10-13 03:21:53 +0000 | [diff] [blame] | 109 | // Use default { 0x10, 0x40, 0x70, 0x40, 0x10 }, as it adds up to 0x110, simulating ink spread. |
| 110 | // SetLcdFilter must be called before SetLcdFilterWeights. |
| 111 | err = FT_Library_SetLcdFilter(gFTLibrary, FT_LCD_FILTER_DEFAULT); |
bungeman@google.com | fd668cf | 2012-08-24 17:46:11 +0000 | [diff] [blame] | 112 | if (0 == err) { |
| 113 | gLCDSupport = true; |
| 114 | gLCDExtra = 2; //Using a filter adds one full pixel to each side. |
| 115 | |
bungeman@google.com | 62566f3 | 2012-10-13 03:21:53 +0000 | [diff] [blame] | 116 | #ifdef SK_FONTHOST_FREETYPE_USE_NORMAL_LCD_FILTER |
| 117 | // This also adds to 0x110 simulating ink spread, but provides better results than default. |
| 118 | static unsigned char gGaussianLikeHeavyWeights[] = { 0x1A, 0x43, 0x56, 0x43, 0x1A, }; |
bungeman@google.com | fd668cf | 2012-08-24 17:46:11 +0000 | [diff] [blame] | 119 | |
| 120 | #if defined(SK_FONTHOST_FREETYPE_RUNTIME_VERSION) && \ |
| 121 | SK_FONTHOST_FREETYPE_RUNTIME_VERSION > 0x020400 |
bungeman@google.com | 62566f3 | 2012-10-13 03:21:53 +0000 | [diff] [blame] | 122 | err = FT_Library_SetLcdFilterWeights(gFTLibrary, gGaussianLikeHeavyWeights); |
bungeman@google.com | fd668cf | 2012-08-24 17:46:11 +0000 | [diff] [blame] | 123 | #elif defined(SK_CAN_USE_DLOPEN) && SK_CAN_USE_DLOPEN == 1 |
| 124 | //The FreeType library is already loaded, so symbols are available in process. |
| 125 | void* self = dlopen(NULL, RTLD_LAZY); |
| 126 | if (NULL != self) { |
| 127 | FT_Library_SetLcdFilterWeightsProc setLcdFilterWeights; |
| 128 | //The following cast is non-standard, but safe for POSIX. |
| 129 | *reinterpret_cast<void**>(&setLcdFilterWeights) = dlsym(self, "FT_Library_SetLcdFilterWeights"); |
| 130 | dlclose(self); |
| 131 | |
| 132 | if (NULL != setLcdFilterWeights) { |
bungeman@google.com | 62566f3 | 2012-10-13 03:21:53 +0000 | [diff] [blame] | 133 | err = setLcdFilterWeights(gFTLibrary, gGaussianLikeHeavyWeights); |
bungeman@google.com | fd668cf | 2012-08-24 17:46:11 +0000 | [diff] [blame] | 134 | } |
| 135 | } |
| 136 | #endif |
bungeman@google.com | 62566f3 | 2012-10-13 03:21:53 +0000 | [diff] [blame] | 137 | #endif |
reed@google.com | a1c3256 | 2012-03-01 19:38:23 +0000 | [diff] [blame] | 138 | } |
epoger@google.com | 5070d79 | 2011-06-29 20:43:14 +0000 | [diff] [blame] | 139 | #else |
| 140 | gLCDSupport = false; |
| 141 | #endif |
reed@android.com | 61608aa | 2009-07-31 14:52:54 +0000 | [diff] [blame] | 142 | gLCDSupportValid = true; |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 143 | |
| 144 | return true; |
| 145 | } |
| 146 | |
reed@google.com | fb2fdcc | 2012-10-17 15:49:36 +0000 | [diff] [blame] | 147 | // Lazy, once, wrapper to ask the FreeType Library if it can support LCD text |
| 148 | static bool is_lcd_supported() { |
| 149 | if (!gLCDSupportValid) { |
| 150 | SkAutoMutexAcquire ac(gFTMutex); |
| 151 | |
| 152 | if (!gLCDSupportValid) { |
| 153 | InitFreetype(); |
| 154 | FT_Done_FreeType(gFTLibrary); |
| 155 | } |
| 156 | } |
| 157 | return gLCDSupport; |
| 158 | } |
| 159 | |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 160 | class SkScalerContext_FreeType : public SkScalerContext_FreeType_Base { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 161 | public: |
| 162 | SkScalerContext_FreeType(const SkDescriptor* desc); |
| 163 | virtual ~SkScalerContext_FreeType(); |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 164 | |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 165 | bool success() const { |
reed@android.com | a0f5d15 | 2009-06-22 17:38:10 +0000 | [diff] [blame] | 166 | return fFaceRec != NULL && |
| 167 | fFTSize != NULL && |
| 168 | fFace != NULL; |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 169 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 170 | |
| 171 | protected: |
bungeman@google.com | a76de72 | 2012-10-26 19:35:54 +0000 | [diff] [blame] | 172 | virtual unsigned generateGlyphCount() SK_OVERRIDE; |
| 173 | virtual uint16_t generateCharToGlyph(SkUnichar uni) SK_OVERRIDE; |
| 174 | virtual void generateAdvance(SkGlyph* glyph) SK_OVERRIDE; |
| 175 | virtual void generateMetrics(SkGlyph* glyph) SK_OVERRIDE; |
| 176 | virtual void generateImage(const SkGlyph& glyph) SK_OVERRIDE; |
| 177 | virtual void generatePath(const SkGlyph& glyph, SkPath* path) SK_OVERRIDE; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 178 | virtual void generateFontMetrics(SkPaint::FontMetrics* mx, |
bungeman@google.com | a76de72 | 2012-10-26 19:35:54 +0000 | [diff] [blame] | 179 | SkPaint::FontMetrics* my) SK_OVERRIDE; |
| 180 | virtual SkUnichar generateGlyphToChar(uint16_t glyph) SK_OVERRIDE; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 181 | |
| 182 | private: |
| 183 | SkFaceRec* fFaceRec; |
| 184 | FT_Face fFace; // reference to shared face in gFaceRecHead |
| 185 | FT_Size fFTSize; // our own copy |
| 186 | SkFixed fScaleX, fScaleY; |
| 187 | FT_Matrix fMatrix22; |
| 188 | uint32_t fLoadGlyphFlags; |
reed@google.com | bdc9988 | 2011-11-21 14:36:57 +0000 | [diff] [blame] | 189 | bool fDoLinearMetrics; |
reed@google.com | a1bfa21 | 2012-03-08 21:57:12 +0000 | [diff] [blame] | 190 | bool fLCDIsVert; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 191 | |
| 192 | FT_Error setupSize(); |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 193 | void getBBoxForCurrentGlyph(SkGlyph* glyph, FT_BBox* bbox, |
| 194 | bool snapToPixelBoundary = false); |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 195 | // Caller must lock gFTMutex before calling this function. |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 196 | void updateGlyphIfLCD(SkGlyph* glyph); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 197 | }; |
| 198 | |
| 199 | /////////////////////////////////////////////////////////////////////////// |
| 200 | /////////////////////////////////////////////////////////////////////////// |
| 201 | |
| 202 | #include "SkStream.h" |
| 203 | |
| 204 | struct SkFaceRec { |
| 205 | SkFaceRec* fNext; |
| 206 | FT_Face fFace; |
| 207 | FT_StreamRec fFTStream; |
| 208 | SkStream* fSkStream; |
| 209 | uint32_t fRefCnt; |
| 210 | uint32_t fFontID; |
| 211 | |
reed@android.com | b1d9d2e | 2009-03-04 17:37:51 +0000 | [diff] [blame] | 212 | // assumes ownership of the stream, will call unref() when its done |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 213 | SkFaceRec(SkStream* strm, uint32_t fontID); |
| 214 | ~SkFaceRec() { |
reed@android.com | b1d9d2e | 2009-03-04 17:37:51 +0000 | [diff] [blame] | 215 | fSkStream->unref(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 216 | } |
| 217 | }; |
| 218 | |
| 219 | extern "C" { |
| 220 | static unsigned long sk_stream_read(FT_Stream stream, |
| 221 | unsigned long offset, |
| 222 | unsigned char* buffer, |
| 223 | unsigned long count ) { |
| 224 | SkStream* str = (SkStream*)stream->descriptor.pointer; |
| 225 | |
| 226 | if (count) { |
| 227 | if (!str->rewind()) { |
| 228 | return 0; |
| 229 | } else { |
| 230 | unsigned long ret; |
| 231 | if (offset) { |
| 232 | ret = str->read(NULL, offset); |
| 233 | if (ret != offset) { |
| 234 | return 0; |
| 235 | } |
| 236 | } |
| 237 | ret = str->read(buffer, count); |
| 238 | if (ret != count) { |
| 239 | return 0; |
| 240 | } |
| 241 | count = ret; |
| 242 | } |
| 243 | } |
| 244 | return count; |
| 245 | } |
| 246 | |
| 247 | static void sk_stream_close( FT_Stream stream) {} |
| 248 | } |
| 249 | |
| 250 | SkFaceRec::SkFaceRec(SkStream* strm, uint32_t fontID) |
vandebo@chromium.org | 9af25f3 | 2012-03-28 21:24:27 +0000 | [diff] [blame] | 251 | : fNext(NULL), fSkStream(strm), fRefCnt(1), fFontID(fontID) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 252 | // SkDEBUGF(("SkFaceRec: opening %s (%p)\n", key.c_str(), strm)); |
| 253 | |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 254 | sk_bzero(&fFTStream, sizeof(fFTStream)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 255 | fFTStream.size = fSkStream->getLength(); |
| 256 | fFTStream.descriptor.pointer = fSkStream; |
| 257 | fFTStream.read = sk_stream_read; |
| 258 | fFTStream.close = sk_stream_close; |
| 259 | } |
| 260 | |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 261 | // Will return 0 on failure |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 262 | // Caller must lock gFTMutex before calling this function. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 263 | static SkFaceRec* ref_ft_face(uint32_t fontID) { |
| 264 | SkFaceRec* rec = gFaceRecHead; |
| 265 | while (rec) { |
| 266 | if (rec->fFontID == fontID) { |
| 267 | SkASSERT(rec->fFace); |
| 268 | rec->fRefCnt += 1; |
| 269 | return rec; |
| 270 | } |
| 271 | rec = rec->fNext; |
| 272 | } |
| 273 | |
| 274 | SkStream* strm = SkFontHost::OpenStream(fontID); |
| 275 | if (NULL == strm) { |
| 276 | SkDEBUGF(("SkFontHost::OpenStream failed opening %x\n", fontID)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 277 | return 0; |
| 278 | } |
| 279 | |
| 280 | // this passes ownership of strm to the rec |
| 281 | rec = SkNEW_ARGS(SkFaceRec, (strm, fontID)); |
| 282 | |
| 283 | FT_Open_Args args; |
| 284 | memset(&args, 0, sizeof(args)); |
| 285 | const void* memoryBase = strm->getMemoryBase(); |
| 286 | |
| 287 | if (NULL != memoryBase) { |
| 288 | //printf("mmap(%s)\n", keyString.c_str()); |
| 289 | args.flags = FT_OPEN_MEMORY; |
| 290 | args.memory_base = (const FT_Byte*)memoryBase; |
| 291 | args.memory_size = strm->getLength(); |
| 292 | } else { |
| 293 | //printf("fopen(%s)\n", keyString.c_str()); |
| 294 | args.flags = FT_OPEN_STREAM; |
| 295 | args.stream = &rec->fFTStream; |
| 296 | } |
| 297 | |
agl@chromium.org | 61a678a | 2010-08-06 18:08:18 +0000 | [diff] [blame] | 298 | int face_index; |
| 299 | int length = SkFontHost::GetFileName(fontID, NULL, 0, &face_index); |
| 300 | FT_Error err = FT_Open_Face(gFTLibrary, &args, length ? face_index : 0, |
| 301 | &rec->fFace); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 302 | |
| 303 | if (err) { // bad filename, try the default font |
| 304 | fprintf(stderr, "ERROR: unable to open font '%x'\n", fontID); |
| 305 | SkDELETE(rec); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 306 | return 0; |
| 307 | } else { |
| 308 | SkASSERT(rec->fFace); |
| 309 | //fprintf(stderr, "Opened font '%s'\n", filename.c_str()); |
| 310 | rec->fNext = gFaceRecHead; |
| 311 | gFaceRecHead = rec; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 312 | return rec; |
| 313 | } |
| 314 | } |
| 315 | |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 316 | // Caller must lock gFTMutex before calling this function. |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 317 | static void unref_ft_face(FT_Face face) { |
| 318 | SkFaceRec* rec = gFaceRecHead; |
| 319 | SkFaceRec* prev = NULL; |
| 320 | while (rec) { |
| 321 | SkFaceRec* next = rec->fNext; |
| 322 | if (rec->fFace == face) { |
| 323 | if (--rec->fRefCnt == 0) { |
| 324 | if (prev) { |
| 325 | prev->fNext = next; |
| 326 | } else { |
| 327 | gFaceRecHead = next; |
| 328 | } |
| 329 | FT_Done_Face(face); |
| 330 | SkDELETE(rec); |
| 331 | } |
| 332 | return; |
| 333 | } |
| 334 | prev = rec; |
| 335 | rec = next; |
| 336 | } |
tomhudson@google.com | 0c00f21 | 2011-12-28 14:59:50 +0000 | [diff] [blame] | 337 | SkDEBUGFAIL("shouldn't get here, face not in list"); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 338 | } |
| 339 | |
| 340 | /////////////////////////////////////////////////////////////////////////// |
| 341 | |
vandebo@chromium.org | 16be6b8 | 2011-01-28 21:28:56 +0000 | [diff] [blame] | 342 | // Work around for old versions of freetype. |
| 343 | static FT_Error getAdvances(FT_Face face, FT_UInt start, FT_UInt count, |
| 344 | FT_Int32 loadFlags, FT_Fixed* advances) { |
| 345 | #ifdef FT_ADVANCES_H |
| 346 | return FT_Get_Advances(face, start, count, loadFlags, advances); |
| 347 | #else |
| 348 | if (!face || start >= face->num_glyphs || |
| 349 | start + count > face->num_glyphs || loadFlags != FT_LOAD_NO_SCALE) { |
| 350 | return 6; // "Invalid argument." |
| 351 | } |
| 352 | if (count == 0) |
| 353 | return 0; |
| 354 | |
| 355 | for (int i = 0; i < count; i++) { |
| 356 | FT_Error err = FT_Load_Glyph(face, start + i, FT_LOAD_NO_SCALE); |
| 357 | if (err) |
| 358 | return err; |
| 359 | advances[i] = face->glyph->advance.x; |
| 360 | } |
| 361 | |
| 362 | return 0; |
| 363 | #endif |
| 364 | } |
| 365 | |
| 366 | static bool canEmbed(FT_Face face) { |
djsollen@google.com | fa394d4 | 2012-01-09 20:40:25 +0000 | [diff] [blame] | 367 | #ifdef FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING |
vandebo@chromium.org | 16be6b8 | 2011-01-28 21:28:56 +0000 | [diff] [blame] | 368 | FT_UShort fsType = FT_Get_FSType_Flags(face); |
| 369 | return (fsType & (FT_FSTYPE_RESTRICTED_LICENSE_EMBEDDING | |
| 370 | FT_FSTYPE_BITMAP_EMBEDDING_ONLY)) == 0; |
| 371 | #else |
| 372 | // No embedding is 0x2 and bitmap embedding only is 0x200. |
| 373 | TT_OS2* os2_table; |
| 374 | if ((os2_table = (TT_OS2*)FT_Get_Sfnt_Table(face, ft_sfnt_os2)) != NULL) { |
| 375 | return (os2_table->fsType & 0x202) == 0; |
| 376 | } |
| 377 | return false; // We tried, fail safe. |
| 378 | #endif |
| 379 | } |
| 380 | |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 381 | static bool GetLetterCBox(FT_Face face, char letter, FT_BBox* bbox) { |
| 382 | const FT_UInt glyph_id = FT_Get_Char_Index(face, letter); |
| 383 | if (!glyph_id) |
| 384 | return false; |
| 385 | FT_Load_Glyph(face, glyph_id, FT_LOAD_NO_SCALE); |
| 386 | FT_Outline_Get_CBox(&face->glyph->outline, bbox); |
| 387 | return true; |
| 388 | } |
| 389 | |
vandebo@chromium.org | 6f72d1e | 2011-02-14 23:19:59 +0000 | [diff] [blame] | 390 | static bool getWidthAdvance(FT_Face face, int gId, int16_t* data) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 391 | FT_Fixed advance = 0; |
vandebo@chromium.org | 6f72d1e | 2011-02-14 23:19:59 +0000 | [diff] [blame] | 392 | if (getAdvances(face, gId, 1, FT_LOAD_NO_SCALE, &advance)) { |
| 393 | return false; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 394 | } |
vandebo@chromium.org | 6f72d1e | 2011-02-14 23:19:59 +0000 | [diff] [blame] | 395 | SkASSERT(data); |
| 396 | *data = advance; |
| 397 | return true; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 398 | } |
| 399 | |
vandebo@chromium.org | 6744d49 | 2011-05-09 18:13:47 +0000 | [diff] [blame] | 400 | static void populate_glyph_to_unicode(FT_Face& face, |
| 401 | SkTDArray<SkUnichar>* glyphToUnicode) { |
| 402 | // Check and see if we have Unicode cmaps. |
| 403 | for (int i = 0; i < face->num_charmaps; ++i) { |
| 404 | // CMaps known to support Unicode: |
| 405 | // Platform ID Encoding ID Name |
| 406 | // ----------- ----------- ----------------------------------- |
| 407 | // 0 0,1 Apple Unicode |
| 408 | // 0 3 Apple Unicode 2.0 (preferred) |
| 409 | // 3 1 Microsoft Unicode UCS-2 |
| 410 | // 3 10 Microsoft Unicode UCS-4 (preferred) |
| 411 | // |
| 412 | // See Apple TrueType Reference Manual |
| 413 | // http://developer.apple.com/fonts/TTRefMan/RM06/Chap6cmap.html |
| 414 | // http://developer.apple.com/fonts/TTRefMan/RM06/Chap6name.html#ID |
| 415 | // Microsoft OpenType Specification |
| 416 | // http://www.microsoft.com/typography/otspec/cmap.htm |
| 417 | |
| 418 | FT_UShort platformId = face->charmaps[i]->platform_id; |
| 419 | FT_UShort encodingId = face->charmaps[i]->encoding_id; |
| 420 | |
| 421 | if (platformId != 0 && platformId != 3) { |
| 422 | continue; |
| 423 | } |
| 424 | if (platformId == 3 && encodingId != 1 && encodingId != 10) { |
| 425 | continue; |
| 426 | } |
| 427 | bool preferredMap = ((platformId == 3 && encodingId == 10) || |
| 428 | (platformId == 0 && encodingId == 3)); |
| 429 | |
| 430 | FT_Set_Charmap(face, face->charmaps[i]); |
| 431 | if (glyphToUnicode->isEmpty()) { |
| 432 | glyphToUnicode->setCount(face->num_glyphs); |
| 433 | memset(glyphToUnicode->begin(), 0, |
| 434 | sizeof(SkUnichar) * face->num_glyphs); |
| 435 | } |
| 436 | |
| 437 | // Iterate through each cmap entry. |
| 438 | FT_UInt glyphIndex; |
| 439 | for (SkUnichar charCode = FT_Get_First_Char(face, &glyphIndex); |
| 440 | glyphIndex != 0; |
| 441 | charCode = FT_Get_Next_Char(face, charCode, &glyphIndex)) { |
| 442 | if (charCode && |
| 443 | ((*glyphToUnicode)[glyphIndex] == 0 || preferredMap)) { |
| 444 | (*glyphToUnicode)[glyphIndex] = charCode; |
| 445 | } |
| 446 | } |
| 447 | } |
| 448 | } |
| 449 | |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 450 | // static |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 451 | SkAdvancedTypefaceMetrics* SkFontHost::GetAdvancedTypefaceMetrics( |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 452 | uint32_t fontID, |
vandebo@chromium.org | 37ad8fb | 2011-08-18 02:38:50 +0000 | [diff] [blame] | 453 | SkAdvancedTypefaceMetrics::PerGlyphInfo perGlyphInfo, |
| 454 | const uint32_t* glyphIDs, |
| 455 | uint32_t glyphIDsCount) { |
djsollen@google.com | da95772 | 2011-11-16 17:00:46 +0000 | [diff] [blame] | 456 | #if defined(SK_BUILD_FOR_MAC) |
reed@google.com | 8a5d692 | 2011-03-14 15:08:03 +0000 | [diff] [blame] | 457 | return NULL; |
| 458 | #else |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 459 | SkAutoMutexAcquire ac(gFTMutex); |
| 460 | FT_Library libInit = NULL; |
| 461 | if (gFTCount == 0) { |
| 462 | if (!InitFreetype()) |
| 463 | sk_throw(); |
| 464 | libInit = gFTLibrary; |
| 465 | } |
| 466 | SkAutoTCallIProc<struct FT_LibraryRec_, FT_Done_FreeType> ftLib(libInit); |
| 467 | SkFaceRec* rec = ref_ft_face(fontID); |
| 468 | if (NULL == rec) |
| 469 | return NULL; |
| 470 | FT_Face face = rec->fFace; |
| 471 | |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 472 | SkAdvancedTypefaceMetrics* info = new SkAdvancedTypefaceMetrics; |
| 473 | info->fFontName.set(FT_Get_Postscript_Name(face)); |
| 474 | info->fMultiMaster = FT_HAS_MULTIPLE_MASTERS(face); |
| 475 | info->fLastGlyphID = face->num_glyphs - 1; |
| 476 | info->fEmSize = 1000; |
| 477 | |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 478 | bool cid = false; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 479 | const char* fontType = FT_Get_X11_Font_Format(face); |
vandebo@chromium.org | c3a2ae5 | 2011-02-03 21:48:23 +0000 | [diff] [blame] | 480 | if (strcmp(fontType, "Type 1") == 0) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 481 | info->fType = SkAdvancedTypefaceMetrics::kType1_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 482 | } else if (strcmp(fontType, "CID Type 1") == 0) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 483 | info->fType = SkAdvancedTypefaceMetrics::kType1CID_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 484 | cid = true; |
| 485 | } else if (strcmp(fontType, "CFF") == 0) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 486 | info->fType = SkAdvancedTypefaceMetrics::kCFF_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 487 | } else if (strcmp(fontType, "TrueType") == 0) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 488 | info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 489 | cid = true; |
| 490 | TT_Header* ttHeader; |
| 491 | if ((ttHeader = (TT_Header*)FT_Get_Sfnt_Table(face, |
| 492 | ft_sfnt_head)) != NULL) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 493 | info->fEmSize = ttHeader->Units_Per_EM; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 494 | } |
| 495 | } |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 496 | |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 497 | info->fStyle = 0; |
| 498 | if (FT_IS_FIXED_WIDTH(face)) |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 499 | info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 500 | if (face->style_flags & FT_STYLE_FLAG_ITALIC) |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 501 | info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 502 | // We should set either Symbolic or Nonsymbolic; Nonsymbolic if the font's |
| 503 | // character set is a subset of 'Adobe standard Latin.' |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 504 | info->fStyle |= SkAdvancedTypefaceMetrics::kSymbolic_Style; |
| 505 | |
| 506 | PS_FontInfoRec ps_info; |
| 507 | TT_Postscript* tt_info; |
| 508 | if (FT_Get_PS_Font_Info(face, &ps_info) == 0) { |
| 509 | info->fItalicAngle = ps_info.italic_angle; |
| 510 | } else if ((tt_info = |
| 511 | (TT_Postscript*)FT_Get_Sfnt_Table(face, |
| 512 | ft_sfnt_post)) != NULL) { |
| 513 | info->fItalicAngle = SkFixedToScalar(tt_info->italicAngle); |
| 514 | } else { |
| 515 | info->fItalicAngle = 0; |
| 516 | } |
| 517 | |
| 518 | info->fAscent = face->ascender; |
| 519 | info->fDescent = face->descender; |
| 520 | |
| 521 | // Figure out a good guess for StemV - Min width of i, I, !, 1. |
| 522 | // This probably isn't very good with an italic font. |
| 523 | int16_t min_width = SHRT_MAX; |
vandebo@chromium.org | 6f72d1e | 2011-02-14 23:19:59 +0000 | [diff] [blame] | 524 | info->fStemV = 0; |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 525 | char stem_chars[] = {'i', 'I', '!', '1'}; |
| 526 | for (size_t i = 0; i < SK_ARRAY_COUNT(stem_chars); i++) { |
| 527 | FT_BBox bbox; |
| 528 | if (GetLetterCBox(face, stem_chars[i], &bbox)) { |
| 529 | int16_t width = bbox.xMax - bbox.xMin; |
| 530 | if (width > 0 && width < min_width) { |
| 531 | min_width = width; |
| 532 | info->fStemV = min_width; |
| 533 | } |
| 534 | } |
| 535 | } |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 536 | |
| 537 | TT_PCLT* pclt_info; |
| 538 | TT_OS2* os2_table; |
| 539 | if ((pclt_info = (TT_PCLT*)FT_Get_Sfnt_Table(face, ft_sfnt_pclt)) != NULL) { |
| 540 | info->fCapHeight = pclt_info->CapHeight; |
| 541 | uint8_t serif_style = pclt_info->SerifStyle & 0x3F; |
| 542 | if (serif_style >= 2 && serif_style <= 6) |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 543 | info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 544 | else if (serif_style >= 9 && serif_style <= 12) |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 545 | info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style; |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 546 | } else if ((os2_table = |
| 547 | (TT_OS2*)FT_Get_Sfnt_Table(face, ft_sfnt_os2)) != NULL) { |
| 548 | info->fCapHeight = os2_table->sCapHeight; |
| 549 | } else { |
| 550 | // Figure out a good guess for CapHeight: average the height of M and X. |
| 551 | FT_BBox m_bbox, x_bbox; |
| 552 | bool got_m, got_x; |
| 553 | got_m = GetLetterCBox(face, 'M', &m_bbox); |
| 554 | got_x = GetLetterCBox(face, 'X', &x_bbox); |
| 555 | if (got_m && got_x) { |
| 556 | info->fCapHeight = (m_bbox.yMax - m_bbox.yMin + x_bbox.yMax - |
| 557 | x_bbox.yMin) / 2; |
| 558 | } else if (got_m && !got_x) { |
| 559 | info->fCapHeight = m_bbox.yMax - m_bbox.yMin; |
| 560 | } else if (!got_m && got_x) { |
| 561 | info->fCapHeight = x_bbox.yMax - x_bbox.yMin; |
| 562 | } |
| 563 | } |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 564 | |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 565 | info->fBBox = SkIRect::MakeLTRB(face->bbox.xMin, face->bbox.yMax, |
| 566 | face->bbox.xMax, face->bbox.yMin); |
| 567 | |
vandebo@chromium.org | 37ad8fb | 2011-08-18 02:38:50 +0000 | [diff] [blame] | 568 | if (!canEmbed(face) || !FT_IS_SCALABLE(face) || |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 569 | info->fType == SkAdvancedTypefaceMetrics::kOther_Font) { |
| 570 | perGlyphInfo = SkAdvancedTypefaceMetrics::kNo_PerGlyphInfo; |
| 571 | } |
| 572 | |
| 573 | if (perGlyphInfo & SkAdvancedTypefaceMetrics::kHAdvance_PerGlyphInfo) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 574 | if (FT_IS_FIXED_WIDTH(face)) { |
| 575 | appendRange(&info->fGlyphWidths, 0); |
| 576 | int16_t advance = face->max_advance_width; |
| 577 | info->fGlyphWidths->fAdvance.append(1, &advance); |
| 578 | finishRange(info->fGlyphWidths.get(), 0, |
| 579 | SkAdvancedTypefaceMetrics::WidthRange::kDefault); |
vandebo@chromium.org | 6f72d1e | 2011-02-14 23:19:59 +0000 | [diff] [blame] | 580 | } else if (!cid) { |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 581 | appendRange(&info->fGlyphWidths, 0); |
| 582 | // So as to not blow out the stack, get advances in batches. |
| 583 | for (int gID = 0; gID < face->num_glyphs; gID += 128) { |
| 584 | FT_Fixed advances[128]; |
| 585 | int advanceCount = 128; |
| 586 | if (gID + advanceCount > face->num_glyphs) |
| 587 | advanceCount = face->num_glyphs - gID + 1; |
| 588 | getAdvances(face, gID, advanceCount, FT_LOAD_NO_SCALE, |
| 589 | advances); |
| 590 | for (int i = 0; i < advanceCount; i++) { |
vandebo@chromium.org | ce8a195 | 2012-10-22 20:09:31 +0000 | [diff] [blame] | 591 | int16_t advance = advances[i]; |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 592 | info->fGlyphWidths->fAdvance.append(1, &advance); |
| 593 | } |
| 594 | } |
| 595 | finishRange(info->fGlyphWidths.get(), face->num_glyphs - 1, |
| 596 | SkAdvancedTypefaceMetrics::WidthRange::kRange); |
| 597 | } else { |
vandebo@chromium.org | 6f72d1e | 2011-02-14 23:19:59 +0000 | [diff] [blame] | 598 | info->fGlyphWidths.reset( |
vandebo@chromium.org | 37ad8fb | 2011-08-18 02:38:50 +0000 | [diff] [blame] | 599 | getAdvanceData(face, |
| 600 | face->num_glyphs, |
| 601 | glyphIDs, |
| 602 | glyphIDsCount, |
| 603 | &getWidthAdvance)); |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 604 | } |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 605 | } |
vandebo@chromium.org | c48b2b3 | 2011-02-02 02:11:22 +0000 | [diff] [blame] | 606 | |
vandebo@chromium.org | 325cb9a | 2011-03-30 18:36:29 +0000 | [diff] [blame] | 607 | if (perGlyphInfo & SkAdvancedTypefaceMetrics::kVAdvance_PerGlyphInfo && |
| 608 | FT_HAS_VERTICAL(face)) { |
| 609 | SkASSERT(false); // Not implemented yet. |
| 610 | } |
| 611 | |
| 612 | if (perGlyphInfo & SkAdvancedTypefaceMetrics::kGlyphNames_PerGlyphInfo && |
| 613 | info->fType == SkAdvancedTypefaceMetrics::kType1_Font) { |
| 614 | // Postscript fonts may contain more than 255 glyphs, so we end up |
| 615 | // using multiple font descriptions with a glyph ordering. Record |
| 616 | // the name of each glyph. |
| 617 | info->fGlyphNames.reset( |
| 618 | new SkAutoTArray<SkString>(face->num_glyphs)); |
| 619 | for (int gID = 0; gID < face->num_glyphs; gID++) { |
| 620 | char glyphName[128]; // PS limit for names is 127 bytes. |
| 621 | FT_Get_Glyph_Name(face, gID, glyphName, 128); |
| 622 | info->fGlyphNames->get()[gID].set(glyphName); |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 623 | } |
| 624 | } |
| 625 | |
vandebo@chromium.org | 6744d49 | 2011-05-09 18:13:47 +0000 | [diff] [blame] | 626 | if (perGlyphInfo & SkAdvancedTypefaceMetrics::kToUnicode_PerGlyphInfo && |
| 627 | info->fType != SkAdvancedTypefaceMetrics::kType1_Font && |
| 628 | face->num_charmaps) { |
| 629 | populate_glyph_to_unicode(face, &(info->fGlyphToUnicode)); |
| 630 | } |
| 631 | |
vandebo@chromium.org | c3a2ae5 | 2011-02-03 21:48:23 +0000 | [diff] [blame] | 632 | if (!canEmbed(face)) |
| 633 | info->fType = SkAdvancedTypefaceMetrics::kNotEmbeddable_Font; |
| 634 | |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 635 | unref_ft_face(face); |
| 636 | return info; |
reed@google.com | 8a5d692 | 2011-03-14 15:08:03 +0000 | [diff] [blame] | 637 | #endif |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 638 | } |
vandebo@chromium.org | 37ad8fb | 2011-08-18 02:38:50 +0000 | [diff] [blame] | 639 | |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 640 | /////////////////////////////////////////////////////////////////////////// |
| 641 | |
reed@google.com | ffe49f5 | 2011-11-22 19:42:41 +0000 | [diff] [blame] | 642 | #define BLACK_LUMINANCE_LIMIT 0x40 |
| 643 | #define WHITE_LUMINANCE_LIMIT 0xA0 |
| 644 | |
reed@google.com | 8ed436c | 2011-07-21 14:12:36 +0000 | [diff] [blame] | 645 | static bool bothZero(SkScalar a, SkScalar b) { |
| 646 | return 0 == a && 0 == b; |
| 647 | } |
| 648 | |
| 649 | // returns false if there is any non-90-rotation or skew |
| 650 | static bool isAxisAligned(const SkScalerContext::Rec& rec) { |
| 651 | return 0 == rec.fPreSkewX && |
| 652 | (bothZero(rec.fPost2x2[0][1], rec.fPost2x2[1][0]) || |
| 653 | bothZero(rec.fPost2x2[0][0], rec.fPost2x2[1][1])); |
| 654 | } |
| 655 | |
bungeman@google.com | cb1bbb3 | 2012-10-12 18:48:35 +0000 | [diff] [blame] | 656 | void SkFontHost::FilterRec(SkScalerContext::Rec* rec, SkTypeface*) { |
bungeman@google.com | 8cf3226 | 2012-04-02 14:34:30 +0000 | [diff] [blame] | 657 | //BOGUS: http://code.google.com/p/chromium/issues/detail?id=121119 |
| 658 | //Cap the requested size as larger sizes give bogus values. |
| 659 | //Remove when http://code.google.com/p/skia/issues/detail?id=554 is fixed. |
bungeman@google.com | 5582e63 | 2012-04-02 14:51:54 +0000 | [diff] [blame] | 660 | if (rec->fTextSize > SkIntToScalar(1 << 14)) { |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 661 | rec->fTextSize = SkIntToScalar(1 << 14); |
bungeman@google.com | 8cf3226 | 2012-04-02 14:34:30 +0000 | [diff] [blame] | 662 | } |
skia.committer@gmail.com | a27096b | 2012-08-30 14:38:00 +0000 | [diff] [blame] | 663 | |
reed@google.com | fb2fdcc | 2012-10-17 15:49:36 +0000 | [diff] [blame] | 664 | if (!is_lcd_supported() && isLCD(*rec)) { |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 665 | // If the runtime Freetype library doesn't support LCD mode, we disable |
| 666 | // it here. |
| 667 | rec->fMaskFormat = SkMask::kA8_Format; |
| 668 | } |
reed@google.com | 5b31b0f | 2011-02-23 14:41:42 +0000 | [diff] [blame] | 669 | |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 670 | SkPaint::Hinting h = rec->getHinting(); |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 671 | if (SkPaint::kFull_Hinting == h && !isLCD(*rec)) { |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 672 | // collapse full->normal hinting if we're not doing LCD |
| 673 | h = SkPaint::kNormal_Hinting; |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 674 | } |
bungeman@google.com | f4f2b80 | 2012-03-08 19:19:51 +0000 | [diff] [blame] | 675 | if ((rec->fFlags & SkScalerContext::kSubpixelPositioning_Flag)) { |
reed@google.com | 1ac8350 | 2012-02-28 17:06:02 +0000 | [diff] [blame] | 676 | if (SkPaint::kNo_Hinting != h) { |
| 677 | h = SkPaint::kSlight_Hinting; |
| 678 | } |
| 679 | } |
| 680 | |
vandebo@chromium.org | 37ad8fb | 2011-08-18 02:38:50 +0000 | [diff] [blame] | 681 | #ifndef SK_IGNORE_ROTATED_FREETYPE_FIX |
reed@google.com | 8ed436c | 2011-07-21 14:12:36 +0000 | [diff] [blame] | 682 | // rotated text looks bad with hinting, so we disable it as needed |
| 683 | if (!isAxisAligned(*rec)) { |
| 684 | h = SkPaint::kNo_Hinting; |
| 685 | } |
bsalomon@google.com | 0e35ca8 | 2011-07-22 17:56:19 +0000 | [diff] [blame] | 686 | #endif |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 687 | rec->setHinting(h); |
reed@google.com | ffe49f5 | 2011-11-22 19:42:41 +0000 | [diff] [blame] | 688 | |
bungeman@google.com | 97efada | 2012-07-30 20:40:50 +0000 | [diff] [blame] | 689 | #ifndef SK_GAMMA_APPLY_TO_A8 |
| 690 | if (!isLCD(*rec)) { |
| 691 | rec->ignorePreBlend(); |
reed@google.com | ffe49f5 | 2011-11-22 19:42:41 +0000 | [diff] [blame] | 692 | } |
reed@google.com | 1ac8350 | 2012-02-28 17:06:02 +0000 | [diff] [blame] | 693 | #endif |
reed@google.com | 618ef5e | 2011-01-26 22:10:41 +0000 | [diff] [blame] | 694 | } |
vandebo@chromium.org | 2a22e10 | 2011-01-25 21:01:34 +0000 | [diff] [blame] | 695 | |
djsollen@google.com | da95772 | 2011-11-16 17:00:46 +0000 | [diff] [blame] | 696 | #ifdef SK_BUILD_FOR_ANDROID |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 697 | uint32_t SkFontHost::GetUnitsPerEm(SkFontID fontID) { |
| 698 | SkAutoMutexAcquire ac(gFTMutex); |
| 699 | SkFaceRec *rec = ref_ft_face(fontID); |
| 700 | uint16_t unitsPerEm = 0; |
| 701 | |
| 702 | if (rec != NULL && rec->fFace != NULL) { |
| 703 | unitsPerEm = rec->fFace->units_per_EM; |
| 704 | unref_ft_face(rec->fFace); |
| 705 | } |
| 706 | |
| 707 | return (uint32_t)unitsPerEm; |
| 708 | } |
| 709 | #endif |
| 710 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 711 | SkScalerContext_FreeType::SkScalerContext_FreeType(const SkDescriptor* desc) |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 712 | : SkScalerContext_FreeType_Base(desc) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 713 | SkAutoMutexAcquire ac(gFTMutex); |
| 714 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 715 | if (gFTCount == 0) { |
reed@android.com | 659aaf9 | 2009-07-23 15:20:21 +0000 | [diff] [blame] | 716 | if (!InitFreetype()) { |
| 717 | sk_throw(); |
| 718 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 719 | } |
| 720 | ++gFTCount; |
| 721 | |
| 722 | // load the font file |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 723 | fFTSize = NULL; |
| 724 | fFace = NULL; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 725 | fFaceRec = ref_ft_face(fRec.fFontID); |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 726 | if (NULL == fFaceRec) { |
| 727 | return; |
| 728 | } |
| 729 | fFace = fFaceRec->fFace; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 730 | |
| 731 | // compute our factors from the record |
| 732 | |
| 733 | SkMatrix m; |
| 734 | |
| 735 | fRec.getSingleMatrix(&m); |
| 736 | |
| 737 | #ifdef DUMP_STRIKE_CREATION |
| 738 | SkString keyString; |
| 739 | SkFontHost::GetDescriptorKeyString(desc, &keyString); |
| 740 | printf("========== strike [%g %g %g] [%g %g %g %g] hints %d format %d %s\n", SkScalarToFloat(fRec.fTextSize), |
| 741 | SkScalarToFloat(fRec.fPreScaleX), SkScalarToFloat(fRec.fPreSkewX), |
| 742 | SkScalarToFloat(fRec.fPost2x2[0][0]), SkScalarToFloat(fRec.fPost2x2[0][1]), |
| 743 | SkScalarToFloat(fRec.fPost2x2[1][0]), SkScalarToFloat(fRec.fPost2x2[1][1]), |
agl@chromium.org | 309485b | 2009-07-21 17:41:32 +0000 | [diff] [blame] | 744 | fRec.getHinting(), fRec.fMaskFormat, keyString.c_str()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 745 | #endif |
| 746 | |
| 747 | // now compute our scale factors |
| 748 | SkScalar sx = m.getScaleX(); |
| 749 | SkScalar sy = m.getScaleY(); |
| 750 | |
| 751 | if (m.getSkewX() || m.getSkewY() || sx < 0 || sy < 0) { |
| 752 | // sort of give up on hinting |
| 753 | sx = SkMaxScalar(SkScalarAbs(sx), SkScalarAbs(m.getSkewX())); |
| 754 | sy = SkMaxScalar(SkScalarAbs(m.getSkewY()), SkScalarAbs(sy)); |
| 755 | sx = sy = SkScalarAve(sx, sy); |
| 756 | |
| 757 | SkScalar inv = SkScalarInvert(sx); |
| 758 | |
| 759 | // flip the skew elements to go from our Y-down system to FreeType's |
| 760 | fMatrix22.xx = SkScalarToFixed(SkScalarMul(m.getScaleX(), inv)); |
| 761 | fMatrix22.xy = -SkScalarToFixed(SkScalarMul(m.getSkewX(), inv)); |
| 762 | fMatrix22.yx = -SkScalarToFixed(SkScalarMul(m.getSkewY(), inv)); |
| 763 | fMatrix22.yy = SkScalarToFixed(SkScalarMul(m.getScaleY(), inv)); |
| 764 | } else { |
| 765 | fMatrix22.xx = fMatrix22.yy = SK_Fixed1; |
| 766 | fMatrix22.xy = fMatrix22.yx = 0; |
| 767 | } |
| 768 | |
reed@google.com | 1f1543f | 2012-09-12 21:08:33 +0000 | [diff] [blame] | 769 | #ifdef SK_SUPPORT_HINTING_SCALE_FACTOR |
reed@google.com | 9548be3 | 2012-09-14 16:00:01 +0000 | [diff] [blame] | 770 | if (fRec.getHinting() == SkPaint::kNo_Hinting) { |
| 771 | fScaleX = SkScalarToFixed(sx); |
| 772 | fScaleY = SkScalarToFixed(sy); |
| 773 | } else { |
| 774 | SkScalar hintingScaleFactor = fRec.fHintingScaleFactor; |
reed@google.com | 1f1543f | 2012-09-12 21:08:33 +0000 | [diff] [blame] | 775 | |
reed@google.com | 9548be3 | 2012-09-14 16:00:01 +0000 | [diff] [blame] | 776 | fScaleX = SkScalarToFixed(sx / hintingScaleFactor); |
| 777 | fScaleY = SkScalarToFixed(sy / hintingScaleFactor); |
reed@google.com | 1f1543f | 2012-09-12 21:08:33 +0000 | [diff] [blame] | 778 | |
reed@google.com | 9548be3 | 2012-09-14 16:00:01 +0000 | [diff] [blame] | 779 | fMatrix22.xx *= hintingScaleFactor; |
| 780 | fMatrix22.xy *= hintingScaleFactor; |
| 781 | fMatrix22.yx *= hintingScaleFactor; |
| 782 | fMatrix22.yy *= hintingScaleFactor; |
| 783 | } |
reed@google.com | 1f1543f | 2012-09-12 21:08:33 +0000 | [diff] [blame] | 784 | #else |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 785 | fScaleX = SkScalarToFixed(sx); |
| 786 | fScaleY = SkScalarToFixed(sy); |
reed@google.com | 1f1543f | 2012-09-12 21:08:33 +0000 | [diff] [blame] | 787 | #endif |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 788 | |
reed@google.com | a1bfa21 | 2012-03-08 21:57:12 +0000 | [diff] [blame] | 789 | fLCDIsVert = SkToBool(fRec.fFlags & SkScalerContext::kLCD_Vertical_Flag); |
| 790 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 791 | // compute the flags we send to Load_Glyph |
| 792 | { |
reed@android.com | e4d0bc0 | 2009-07-24 19:53:20 +0000 | [diff] [blame] | 793 | FT_Int32 loadFlags = FT_LOAD_DEFAULT; |
bungeman@google.com | 34f1026 | 2012-03-23 18:11:47 +0000 | [diff] [blame] | 794 | bool linearMetrics = SkToBool(fRec.fFlags & SkScalerContext::kSubpixelPositioning_Flag); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 795 | |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 796 | if (SkMask::kBW_Format == fRec.fMaskFormat) { |
| 797 | // See http://code.google.com/p/chromium/issues/detail?id=43252#c24 |
| 798 | loadFlags = FT_LOAD_TARGET_MONO; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 799 | if (fRec.getHinting() == SkPaint::kNo_Hinting) { |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 800 | loadFlags = FT_LOAD_NO_HINTING; |
reed@google.com | bdc9988 | 2011-11-21 14:36:57 +0000 | [diff] [blame] | 801 | linearMetrics = true; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 802 | } |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 803 | } else { |
| 804 | switch (fRec.getHinting()) { |
| 805 | case SkPaint::kNo_Hinting: |
| 806 | loadFlags = FT_LOAD_NO_HINTING; |
reed@google.com | bdc9988 | 2011-11-21 14:36:57 +0000 | [diff] [blame] | 807 | linearMetrics = true; |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 808 | break; |
| 809 | case SkPaint::kSlight_Hinting: |
| 810 | loadFlags = FT_LOAD_TARGET_LIGHT; // This implies FORCE_AUTOHINT |
| 811 | break; |
| 812 | case SkPaint::kNormal_Hinting: |
agl@chromium.org | a2c71cb | 2010-06-17 20:49:17 +0000 | [diff] [blame] | 813 | if (fRec.fFlags & SkScalerContext::kAutohinting_Flag) |
| 814 | loadFlags = FT_LOAD_FORCE_AUTOHINT; |
| 815 | else |
| 816 | loadFlags = FT_LOAD_NO_AUTOHINT; |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 817 | break; |
| 818 | case SkPaint::kFull_Hinting: |
agl@chromium.org | a2c71cb | 2010-06-17 20:49:17 +0000 | [diff] [blame] | 819 | if (fRec.fFlags & SkScalerContext::kAutohinting_Flag) { |
| 820 | loadFlags = FT_LOAD_FORCE_AUTOHINT; |
| 821 | break; |
| 822 | } |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 823 | loadFlags = FT_LOAD_TARGET_NORMAL; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 824 | if (isLCD(fRec)) { |
reed@google.com | a1bfa21 | 2012-03-08 21:57:12 +0000 | [diff] [blame] | 825 | if (fLCDIsVert) { |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 826 | loadFlags = FT_LOAD_TARGET_LCD_V; |
| 827 | } else { |
| 828 | loadFlags = FT_LOAD_TARGET_LCD; |
| 829 | } |
reed@google.com | ea2333d | 2011-03-14 16:44:56 +0000 | [diff] [blame] | 830 | } |
agl@chromium.org | 70a303f | 2010-05-10 14:15:50 +0000 | [diff] [blame] | 831 | break; |
| 832 | default: |
| 833 | SkDebugf("---------- UNKNOWN hinting %d\n", fRec.getHinting()); |
| 834 | break; |
| 835 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 836 | } |
| 837 | |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 838 | if ((fRec.fFlags & SkScalerContext::kEmbeddedBitmapText_Flag) == 0) { |
agl@chromium.org | e0d0899 | 2009-08-07 19:19:23 +0000 | [diff] [blame] | 839 | loadFlags |= FT_LOAD_NO_BITMAP; |
reed@google.com | effc501 | 2011-06-27 16:44:46 +0000 | [diff] [blame] | 840 | } |
agl@chromium.org | e0d0899 | 2009-08-07 19:19:23 +0000 | [diff] [blame] | 841 | |
reed@google.com | 96a9f791 | 2011-05-06 11:49:30 +0000 | [diff] [blame] | 842 | // Always using FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH to get correct |
| 843 | // advances, as fontconfig and cairo do. |
| 844 | // See http://code.google.com/p/skia/issues/detail?id=222. |
| 845 | loadFlags |= FT_LOAD_IGNORE_GLOBAL_ADVANCE_WIDTH; |
| 846 | |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 847 | // Use vertical layout if requested. |
| 848 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 849 | loadFlags |= FT_LOAD_VERTICAL_LAYOUT; |
| 850 | } |
| 851 | |
reed@android.com | e4d0bc0 | 2009-07-24 19:53:20 +0000 | [diff] [blame] | 852 | fLoadGlyphFlags = loadFlags; |
reed@google.com | bdc9988 | 2011-11-21 14:36:57 +0000 | [diff] [blame] | 853 | fDoLinearMetrics = linearMetrics; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 854 | } |
| 855 | |
| 856 | // now create the FT_Size |
| 857 | |
| 858 | { |
| 859 | FT_Error err; |
| 860 | |
| 861 | err = FT_New_Size(fFace, &fFTSize); |
| 862 | if (err != 0) { |
| 863 | SkDEBUGF(("SkScalerContext_FreeType::FT_New_Size(%x): FT_Set_Char_Size(0x%x, 0x%x) returned 0x%x\n", |
| 864 | fFaceRec->fFontID, fScaleX, fScaleY, err)); |
| 865 | fFace = NULL; |
| 866 | return; |
| 867 | } |
| 868 | |
| 869 | err = FT_Activate_Size(fFTSize); |
| 870 | if (err != 0) { |
| 871 | SkDEBUGF(("SkScalerContext_FreeType::FT_Activate_Size(%x, 0x%x, 0x%x) returned 0x%x\n", |
| 872 | fFaceRec->fFontID, fScaleX, fScaleY, err)); |
| 873 | fFTSize = NULL; |
| 874 | } |
| 875 | |
| 876 | err = FT_Set_Char_Size( fFace, |
| 877 | SkFixedToFDot6(fScaleX), SkFixedToFDot6(fScaleY), |
| 878 | 72, 72); |
| 879 | if (err != 0) { |
| 880 | SkDEBUGF(("SkScalerContext_FreeType::FT_Set_Char_Size(%x, 0x%x, 0x%x) returned 0x%x\n", |
| 881 | fFaceRec->fFontID, fScaleX, fScaleY, err)); |
| 882 | fFace = NULL; |
| 883 | return; |
| 884 | } |
| 885 | |
| 886 | FT_Set_Transform( fFace, &fMatrix22, NULL); |
| 887 | } |
| 888 | } |
| 889 | |
| 890 | SkScalerContext_FreeType::~SkScalerContext_FreeType() { |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 891 | SkAutoMutexAcquire ac(gFTMutex); |
| 892 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 893 | if (fFTSize != NULL) { |
| 894 | FT_Done_Size(fFTSize); |
| 895 | } |
| 896 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 897 | if (fFace != NULL) { |
| 898 | unref_ft_face(fFace); |
| 899 | } |
| 900 | if (--gFTCount == 0) { |
| 901 | // SkDEBUGF(("FT_Done_FreeType\n")); |
| 902 | FT_Done_FreeType(gFTLibrary); |
| 903 | SkDEBUGCODE(gFTLibrary = NULL;) |
| 904 | } |
| 905 | } |
| 906 | |
| 907 | /* We call this before each use of the fFace, since we may be sharing |
| 908 | this face with other context (at different sizes). |
| 909 | */ |
| 910 | FT_Error SkScalerContext_FreeType::setupSize() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 911 | FT_Error err = FT_Activate_Size(fFTSize); |
| 912 | |
| 913 | if (err != 0) { |
| 914 | SkDEBUGF(("SkScalerContext_FreeType::FT_Activate_Size(%x, 0x%x, 0x%x) returned 0x%x\n", |
| 915 | fFaceRec->fFontID, fScaleX, fScaleY, err)); |
| 916 | fFTSize = NULL; |
| 917 | } else { |
| 918 | // seems we need to reset this every time (not sure why, but without it |
| 919 | // I get random italics from some other fFTSize) |
| 920 | FT_Set_Transform( fFace, &fMatrix22, NULL); |
| 921 | } |
| 922 | return err; |
| 923 | } |
| 924 | |
ctguil@chromium.org | 0bc7bf5 | 2011-03-04 19:04:57 +0000 | [diff] [blame] | 925 | unsigned SkScalerContext_FreeType::generateGlyphCount() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 926 | return fFace->num_glyphs; |
| 927 | } |
| 928 | |
| 929 | uint16_t SkScalerContext_FreeType::generateCharToGlyph(SkUnichar uni) { |
| 930 | return SkToU16(FT_Get_Char_Index( fFace, uni )); |
| 931 | } |
| 932 | |
reed@android.com | 9d3a985 | 2010-01-08 14:07:42 +0000 | [diff] [blame] | 933 | SkUnichar SkScalerContext_FreeType::generateGlyphToChar(uint16_t glyph) { |
| 934 | // iterate through each cmap entry, looking for matching glyph indices |
| 935 | FT_UInt glyphIndex; |
| 936 | SkUnichar charCode = FT_Get_First_Char( fFace, &glyphIndex ); |
| 937 | |
| 938 | while (glyphIndex != 0) { |
| 939 | if (glyphIndex == glyph) { |
| 940 | return charCode; |
| 941 | } |
| 942 | charCode = FT_Get_Next_Char( fFace, charCode, &glyphIndex ); |
| 943 | } |
| 944 | |
| 945 | return 0; |
| 946 | } |
| 947 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 948 | void SkScalerContext_FreeType::generateAdvance(SkGlyph* glyph) { |
| 949 | #ifdef FT_ADVANCES_H |
| 950 | /* unhinted and light hinted text have linearly scaled advances |
| 951 | * which are very cheap to compute with some font formats... |
| 952 | */ |
reed@google.com | bdc9988 | 2011-11-21 14:36:57 +0000 | [diff] [blame] | 953 | if (fDoLinearMetrics) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 954 | SkAutoMutexAcquire ac(gFTMutex); |
| 955 | |
| 956 | if (this->setupSize()) { |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 957 | glyph->zeroMetrics(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 958 | return; |
| 959 | } |
| 960 | |
| 961 | FT_Error error; |
| 962 | FT_Fixed advance; |
| 963 | |
| 964 | error = FT_Get_Advance( fFace, glyph->getGlyphID(fBaseGlyphCount), |
| 965 | fLoadGlyphFlags | FT_ADVANCE_FLAG_FAST_ONLY, |
| 966 | &advance ); |
| 967 | if (0 == error) { |
| 968 | glyph->fRsbDelta = 0; |
| 969 | glyph->fLsbDelta = 0; |
reed@google.com | d074c37 | 2012-07-18 13:45:58 +0000 | [diff] [blame] | 970 | glyph->fAdvanceX = SkFixedMul(fMatrix22.xx, advance); |
| 971 | glyph->fAdvanceY = - SkFixedMul(fMatrix22.yx, advance); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 972 | return; |
| 973 | } |
| 974 | } |
| 975 | #endif /* FT_ADVANCES_H */ |
| 976 | /* otherwise, we need to load/hint the glyph, which is slower */ |
| 977 | this->generateMetrics(glyph); |
| 978 | return; |
| 979 | } |
| 980 | |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 981 | void SkScalerContext_FreeType::getBBoxForCurrentGlyph(SkGlyph* glyph, |
| 982 | FT_BBox* bbox, |
| 983 | bool snapToPixelBoundary) { |
| 984 | |
| 985 | FT_Outline_Get_CBox(&fFace->glyph->outline, bbox); |
| 986 | |
| 987 | if (fRec.fFlags & SkScalerContext::kSubpixelPositioning_Flag) { |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 988 | int dx = SkFixedToFDot6(glyph->getSubXFixed()); |
| 989 | int dy = SkFixedToFDot6(glyph->getSubYFixed()); |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 990 | // negate dy since freetype-y-goes-up and skia-y-goes-down |
| 991 | bbox->xMin += dx; |
| 992 | bbox->yMin -= dy; |
| 993 | bbox->xMax += dx; |
| 994 | bbox->yMax -= dy; |
| 995 | } |
| 996 | |
| 997 | // outset the box to integral boundaries |
| 998 | if (snapToPixelBoundary) { |
| 999 | bbox->xMin &= ~63; |
| 1000 | bbox->yMin &= ~63; |
| 1001 | bbox->xMax = (bbox->xMax + 63) & ~63; |
| 1002 | bbox->yMax = (bbox->yMax + 63) & ~63; |
| 1003 | } |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1004 | |
| 1005 | // Must come after snapToPixelBoundary so that the width and height are |
| 1006 | // consistent. Otherwise asserts will fire later on when generating the |
| 1007 | // glyph image. |
| 1008 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 1009 | FT_Vector vector; |
| 1010 | vector.x = fFace->glyph->metrics.vertBearingX - fFace->glyph->metrics.horiBearingX; |
| 1011 | vector.y = -fFace->glyph->metrics.vertBearingY - fFace->glyph->metrics.horiBearingY; |
| 1012 | FT_Vector_Transform(&vector, &fMatrix22); |
| 1013 | bbox->xMin += vector.x; |
| 1014 | bbox->xMax += vector.x; |
| 1015 | bbox->yMin += vector.y; |
| 1016 | bbox->yMax += vector.y; |
| 1017 | } |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1018 | } |
| 1019 | |
| 1020 | void SkScalerContext_FreeType::updateGlyphIfLCD(SkGlyph* glyph) { |
| 1021 | if (isLCD(fRec)) { |
| 1022 | if (fLCDIsVert) { |
| 1023 | glyph->fHeight += gLCDExtra; |
| 1024 | glyph->fTop -= gLCDExtra >> 1; |
| 1025 | } else { |
| 1026 | glyph->fWidth += gLCDExtra; |
| 1027 | glyph->fLeft -= gLCDExtra >> 1; |
| 1028 | } |
| 1029 | } |
| 1030 | } |
| 1031 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1032 | void SkScalerContext_FreeType::generateMetrics(SkGlyph* glyph) { |
| 1033 | SkAutoMutexAcquire ac(gFTMutex); |
| 1034 | |
| 1035 | glyph->fRsbDelta = 0; |
| 1036 | glyph->fLsbDelta = 0; |
| 1037 | |
| 1038 | FT_Error err; |
| 1039 | |
| 1040 | if (this->setupSize()) { |
| 1041 | goto ERROR; |
| 1042 | } |
| 1043 | |
| 1044 | err = FT_Load_Glyph( fFace, glyph->getGlyphID(fBaseGlyphCount), fLoadGlyphFlags ); |
| 1045 | if (err != 0) { |
mike@reedtribe.org | 7a722f0 | 2012-11-15 02:12:14 +0000 | [diff] [blame^] | 1046 | #if 0 |
| 1047 | SkDEBUGF(("SkScalerContext_FreeType::generateMetrics(%x): FT_Load_Glyph(glyph:%d flags:%x) returned 0x%x\n", |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1048 | fFaceRec->fFontID, glyph->getGlyphID(fBaseGlyphCount), fLoadGlyphFlags, err)); |
mike@reedtribe.org | 7a722f0 | 2012-11-15 02:12:14 +0000 | [diff] [blame^] | 1049 | #endif |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1050 | ERROR: |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 1051 | glyph->zeroMetrics(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1052 | return; |
| 1053 | } |
| 1054 | |
| 1055 | switch ( fFace->glyph->format ) { |
thakis@chromium.org | 598b859 | 2011-05-24 05:42:55 +0000 | [diff] [blame] | 1056 | case FT_GLYPH_FORMAT_OUTLINE: { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1057 | FT_BBox bbox; |
| 1058 | |
bungeman@google.com | 0f0c288 | 2011-11-04 15:47:41 +0000 | [diff] [blame] | 1059 | if (0 == fFace->glyph->outline.n_contours) { |
| 1060 | glyph->fWidth = 0; |
| 1061 | glyph->fHeight = 0; |
| 1062 | glyph->fTop = 0; |
| 1063 | glyph->fLeft = 0; |
| 1064 | break; |
| 1065 | } |
| 1066 | |
senorblanco@chromium.org | 4526a84 | 2010-02-05 23:08:20 +0000 | [diff] [blame] | 1067 | if (fRec.fFlags & kEmbolden_Flag) { |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 1068 | emboldenOutline(fFace, &fFace->glyph->outline); |
senorblanco@chromium.org | 4526a84 | 2010-02-05 23:08:20 +0000 | [diff] [blame] | 1069 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1070 | |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1071 | getBBoxForCurrentGlyph(glyph, &bbox, true); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1072 | |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1073 | glyph->fWidth = SkToU16(SkFDot6Floor(bbox.xMax - bbox.xMin)); |
| 1074 | glyph->fHeight = SkToU16(SkFDot6Floor(bbox.yMax - bbox.yMin)); |
| 1075 | glyph->fTop = -SkToS16(SkFDot6Floor(bbox.yMax)); |
| 1076 | glyph->fLeft = SkToS16(SkFDot6Floor(bbox.xMin)); |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1077 | |
| 1078 | updateGlyphIfLCD(glyph); |
| 1079 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1080 | break; |
thakis@chromium.org | 598b859 | 2011-05-24 05:42:55 +0000 | [diff] [blame] | 1081 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1082 | |
| 1083 | case FT_GLYPH_FORMAT_BITMAP: |
agl@chromium.org | e76073b | 2010-06-04 20:31:17 +0000 | [diff] [blame] | 1084 | if (fRec.fFlags & kEmbolden_Flag) { |
| 1085 | FT_GlyphSlot_Own_Bitmap(fFace->glyph); |
| 1086 | FT_Bitmap_Embolden(gFTLibrary, &fFace->glyph->bitmap, kBitmapEmboldenStrength, 0); |
| 1087 | } |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1088 | |
| 1089 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 1090 | FT_Vector vector; |
| 1091 | vector.x = fFace->glyph->metrics.vertBearingX - fFace->glyph->metrics.horiBearingX; |
| 1092 | vector.y = -fFace->glyph->metrics.vertBearingY - fFace->glyph->metrics.horiBearingY; |
| 1093 | FT_Vector_Transform(&vector, &fMatrix22); |
| 1094 | fFace->glyph->bitmap_left += SkFDot6Floor(vector.x); |
| 1095 | fFace->glyph->bitmap_top += SkFDot6Floor(vector.y); |
| 1096 | } |
| 1097 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1098 | glyph->fWidth = SkToU16(fFace->glyph->bitmap.width); |
| 1099 | glyph->fHeight = SkToU16(fFace->glyph->bitmap.rows); |
| 1100 | glyph->fTop = -SkToS16(fFace->glyph->bitmap_top); |
| 1101 | glyph->fLeft = SkToS16(fFace->glyph->bitmap_left); |
| 1102 | break; |
| 1103 | |
| 1104 | default: |
tomhudson@google.com | 0c00f21 | 2011-12-28 14:59:50 +0000 | [diff] [blame] | 1105 | SkDEBUGFAIL("unknown glyph format"); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1106 | goto ERROR; |
| 1107 | } |
| 1108 | |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1109 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 1110 | if (fDoLinearMetrics) { |
| 1111 | glyph->fAdvanceX = -SkFixedMul(fMatrix22.xy, fFace->glyph->linearVertAdvance); |
| 1112 | glyph->fAdvanceY = SkFixedMul(fMatrix22.yy, fFace->glyph->linearVertAdvance); |
| 1113 | } else { |
| 1114 | glyph->fAdvanceX = -SkFDot6ToFixed(fFace->glyph->advance.x); |
| 1115 | glyph->fAdvanceY = SkFDot6ToFixed(fFace->glyph->advance.y); |
| 1116 | } |
bungeman@google.com | 34f1026 | 2012-03-23 18:11:47 +0000 | [diff] [blame] | 1117 | } else { |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1118 | if (fDoLinearMetrics) { |
| 1119 | glyph->fAdvanceX = SkFixedMul(fMatrix22.xx, fFace->glyph->linearHoriAdvance); |
| 1120 | glyph->fAdvanceY = -SkFixedMul(fMatrix22.yx, fFace->glyph->linearHoriAdvance); |
| 1121 | } else { |
| 1122 | glyph->fAdvanceX = SkFDot6ToFixed(fFace->glyph->advance.x); |
| 1123 | glyph->fAdvanceY = -SkFDot6ToFixed(fFace->glyph->advance.y); |
bungeman@google.com | 34f1026 | 2012-03-23 18:11:47 +0000 | [diff] [blame] | 1124 | |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1125 | if (fRec.fFlags & kDevKernText_Flag) { |
| 1126 | glyph->fRsbDelta = SkToS8(fFace->glyph->rsb_delta); |
| 1127 | glyph->fLsbDelta = SkToS8(fFace->glyph->lsb_delta); |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1128 | } |
| 1129 | } |
djsollen@google.com | d8b599c | 2012-03-19 19:44:19 +0000 | [diff] [blame] | 1130 | } |
| 1131 | |
| 1132 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1133 | #ifdef ENABLE_GLYPH_SPEW |
| 1134 | SkDEBUGF(("FT_Set_Char_Size(this:%p sx:%x sy:%x ", this, fScaleX, fScaleY)); |
| 1135 | SkDEBUGF(("Metrics(glyph:%d flags:0x%x) w:%d\n", glyph->getGlyphID(fBaseGlyphCount), fLoadGlyphFlags, glyph->fWidth)); |
| 1136 | #endif |
| 1137 | } |
| 1138 | |
reed@google.com | ea2333d | 2011-03-14 16:44:56 +0000 | [diff] [blame] | 1139 | |
bungeman@google.com | a76de72 | 2012-10-26 19:35:54 +0000 | [diff] [blame] | 1140 | void SkScalerContext_FreeType::generateImage(const SkGlyph& glyph) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1141 | SkAutoMutexAcquire ac(gFTMutex); |
| 1142 | |
| 1143 | FT_Error err; |
| 1144 | |
| 1145 | if (this->setupSize()) { |
| 1146 | goto ERROR; |
| 1147 | } |
| 1148 | |
| 1149 | err = FT_Load_Glyph( fFace, glyph.getGlyphID(fBaseGlyphCount), fLoadGlyphFlags); |
| 1150 | if (err != 0) { |
| 1151 | SkDEBUGF(("SkScalerContext_FreeType::generateImage: FT_Load_Glyph(glyph:%d width:%d height:%d rb:%d flags:%d) returned 0x%x\n", |
| 1152 | glyph.getGlyphID(fBaseGlyphCount), glyph.fWidth, glyph.fHeight, glyph.rowBytes(), fLoadGlyphFlags, err)); |
| 1153 | ERROR: |
| 1154 | memset(glyph.fImage, 0, glyph.rowBytes() * glyph.fHeight); |
| 1155 | return; |
| 1156 | } |
| 1157 | |
bungeman@google.com | a76de72 | 2012-10-26 19:35:54 +0000 | [diff] [blame] | 1158 | generateGlyphImage(fFace, glyph); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1159 | } |
| 1160 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1161 | |
| 1162 | void SkScalerContext_FreeType::generatePath(const SkGlyph& glyph, |
| 1163 | SkPath* path) { |
| 1164 | SkAutoMutexAcquire ac(gFTMutex); |
| 1165 | |
| 1166 | SkASSERT(&glyph && path); |
| 1167 | |
| 1168 | if (this->setupSize()) { |
| 1169 | path->reset(); |
| 1170 | return; |
| 1171 | } |
| 1172 | |
| 1173 | uint32_t flags = fLoadGlyphFlags; |
| 1174 | flags |= FT_LOAD_NO_BITMAP; // ignore embedded bitmaps so we're sure to get the outline |
| 1175 | flags &= ~FT_LOAD_RENDER; // don't scan convert (we just want the outline) |
| 1176 | |
| 1177 | FT_Error err = FT_Load_Glyph( fFace, glyph.getGlyphID(fBaseGlyphCount), flags); |
| 1178 | |
| 1179 | if (err != 0) { |
| 1180 | SkDEBUGF(("SkScalerContext_FreeType::generatePath: FT_Load_Glyph(glyph:%d flags:%d) returned 0x%x\n", |
| 1181 | glyph.getGlyphID(fBaseGlyphCount), flags, err)); |
| 1182 | path->reset(); |
| 1183 | return; |
| 1184 | } |
| 1185 | |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 1186 | generateGlyphPath(fFace, glyph, path); |
bungeman@google.com | 8ff8a19 | 2012-09-25 20:38:28 +0000 | [diff] [blame] | 1187 | |
| 1188 | // The path's origin from FreeType is always the horizontal layout origin. |
| 1189 | // Offset the path so that it is relative to the vertical origin if needed. |
| 1190 | if (fRec.fFlags & SkScalerContext::kVertical_Flag) { |
| 1191 | FT_Vector vector; |
| 1192 | vector.x = fFace->glyph->metrics.vertBearingX - fFace->glyph->metrics.horiBearingX; |
| 1193 | vector.y = -fFace->glyph->metrics.vertBearingY - fFace->glyph->metrics.horiBearingY; |
| 1194 | FT_Vector_Transform(&vector, &fMatrix22); |
| 1195 | path->offset(SkFDot6ToScalar(vector.x), -SkFDot6ToScalar(vector.y)); |
| 1196 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1197 | } |
| 1198 | |
| 1199 | void SkScalerContext_FreeType::generateFontMetrics(SkPaint::FontMetrics* mx, |
| 1200 | SkPaint::FontMetrics* my) { |
| 1201 | if (NULL == mx && NULL == my) { |
| 1202 | return; |
| 1203 | } |
| 1204 | |
| 1205 | SkAutoMutexAcquire ac(gFTMutex); |
| 1206 | |
| 1207 | if (this->setupSize()) { |
reed@android.com | a8a8b8b | 2009-05-04 15:00:11 +0000 | [diff] [blame] | 1208 | ERROR: |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1209 | if (mx) { |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 1210 | sk_bzero(mx, sizeof(SkPaint::FontMetrics)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1211 | } |
| 1212 | if (my) { |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 1213 | sk_bzero(my, sizeof(SkPaint::FontMetrics)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1214 | } |
| 1215 | return; |
| 1216 | } |
| 1217 | |
reed@android.com | a8a8b8b | 2009-05-04 15:00:11 +0000 | [diff] [blame] | 1218 | FT_Face face = fFace; |
| 1219 | int upem = face->units_per_EM; |
| 1220 | if (upem <= 0) { |
| 1221 | goto ERROR; |
| 1222 | } |
| 1223 | |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 1224 | SkPoint pts[6]; |
| 1225 | SkFixed ys[6]; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1226 | SkFixed scaleY = fScaleY; |
| 1227 | SkFixed mxy = fMatrix22.xy; |
| 1228 | SkFixed myy = fMatrix22.yy; |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 1229 | SkScalar xmin = SkIntToScalar(face->bbox.xMin) / upem; |
| 1230 | SkScalar xmax = SkIntToScalar(face->bbox.xMax) / upem; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1231 | |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 1232 | int leading = face->height - (face->ascender + -face->descender); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1233 | if (leading < 0) { |
| 1234 | leading = 0; |
| 1235 | } |
| 1236 | |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 1237 | // Try to get the OS/2 table from the font. This contains the specific |
| 1238 | // average font width metrics which Windows uses. |
| 1239 | TT_OS2* os2 = (TT_OS2*) FT_Get_Sfnt_Table(face, ft_sfnt_os2); |
| 1240 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1241 | ys[0] = -face->bbox.yMax; |
| 1242 | ys[1] = -face->ascender; |
| 1243 | ys[2] = -face->descender; |
| 1244 | ys[3] = -face->bbox.yMin; |
| 1245 | ys[4] = leading; |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 1246 | ys[5] = os2 ? os2->xAvgCharWidth : 0; |
| 1247 | |
| 1248 | SkScalar x_height; |
| 1249 | if (os2 && os2->sxHeight) { |
| 1250 | x_height = SkFixedToScalar(SkMulDiv(fScaleX, os2->sxHeight, upem)); |
| 1251 | } else { |
| 1252 | const FT_UInt x_glyph = FT_Get_Char_Index(fFace, 'x'); |
| 1253 | if (x_glyph) { |
| 1254 | FT_BBox bbox; |
| 1255 | FT_Load_Glyph(fFace, x_glyph, fLoadGlyphFlags); |
senorblanco@chromium.org | 4526a84 | 2010-02-05 23:08:20 +0000 | [diff] [blame] | 1256 | if (fRec.fFlags & kEmbolden_Flag) { |
george@mozilla.com | c59b5da | 2012-08-23 00:39:08 +0000 | [diff] [blame] | 1257 | emboldenOutline(fFace, &fFace->glyph->outline); |
senorblanco@chromium.org | 4526a84 | 2010-02-05 23:08:20 +0000 | [diff] [blame] | 1258 | } |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 1259 | FT_Outline_Get_CBox(&fFace->glyph->outline, &bbox); |
epoger@google.com | b90113d | 2012-01-18 19:20:39 +0000 | [diff] [blame] | 1260 | x_height = SkFixedToScalar(SkFDot6ToFixed(bbox.yMax)); |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 1261 | } else { |
| 1262 | x_height = 0; |
| 1263 | } |
| 1264 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1265 | |
| 1266 | // convert upem-y values into scalar points |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 1267 | for (int i = 0; i < 6; i++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1268 | SkFixed y = SkMulDiv(scaleY, ys[i], upem); |
| 1269 | SkFixed x = SkFixedMul(mxy, y); |
| 1270 | y = SkFixedMul(myy, y); |
| 1271 | pts[i].set(SkFixedToScalar(x), SkFixedToScalar(y)); |
| 1272 | } |
| 1273 | |
| 1274 | if (mx) { |
| 1275 | mx->fTop = pts[0].fX; |
| 1276 | mx->fAscent = pts[1].fX; |
| 1277 | mx->fDescent = pts[2].fX; |
| 1278 | mx->fBottom = pts[3].fX; |
| 1279 | mx->fLeading = pts[4].fX; |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 1280 | mx->fAvgCharWidth = pts[5].fX; |
| 1281 | mx->fXMin = xmin; |
| 1282 | mx->fXMax = xmax; |
| 1283 | mx->fXHeight = x_height; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1284 | } |
| 1285 | if (my) { |
| 1286 | my->fTop = pts[0].fY; |
| 1287 | my->fAscent = pts[1].fY; |
| 1288 | my->fDescent = pts[2].fY; |
| 1289 | my->fBottom = pts[3].fY; |
| 1290 | my->fLeading = pts[4].fY; |
agl@chromium.org | cc3096b | 2009-04-22 22:09:04 +0000 | [diff] [blame] | 1291 | my->fAvgCharWidth = pts[5].fY; |
| 1292 | my->fXMin = xmin; |
| 1293 | my->fXMax = xmax; |
| 1294 | my->fXHeight = x_height; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1295 | } |
| 1296 | } |
| 1297 | |
| 1298 | //////////////////////////////////////////////////////////////////////// |
| 1299 | //////////////////////////////////////////////////////////////////////// |
| 1300 | |
| 1301 | SkScalerContext* SkFontHost::CreateScalerContext(const SkDescriptor* desc) { |
reed@android.com | 62900b4 | 2009-02-11 15:07:19 +0000 | [diff] [blame] | 1302 | SkScalerContext_FreeType* c = SkNEW_ARGS(SkScalerContext_FreeType, (desc)); |
| 1303 | if (!c->success()) { |
| 1304 | SkDELETE(c); |
| 1305 | c = NULL; |
| 1306 | } |
| 1307 | return c; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1308 | } |
| 1309 | |
| 1310 | /////////////////////////////////////////////////////////////////////////////// |
| 1311 | |
| 1312 | /* Export this so that other parts of our FonttHost port can make use of our |
| 1313 | ability to extract the name+style from a stream, using FreeType's api. |
| 1314 | */ |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1315 | bool find_name_and_attributes(SkStream* stream, SkString* name, |
| 1316 | SkTypeface::Style* style, bool* isFixedWidth) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1317 | FT_Library library; |
reed@android.com | bfbd4ff | 2009-07-23 17:44:41 +0000 | [diff] [blame] | 1318 | if (FT_Init_FreeType(&library)) { |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1319 | return false; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1320 | } |
| 1321 | |
| 1322 | FT_Open_Args args; |
| 1323 | memset(&args, 0, sizeof(args)); |
| 1324 | |
| 1325 | const void* memoryBase = stream->getMemoryBase(); |
| 1326 | FT_StreamRec streamRec; |
| 1327 | |
| 1328 | if (NULL != memoryBase) { |
| 1329 | args.flags = FT_OPEN_MEMORY; |
| 1330 | args.memory_base = (const FT_Byte*)memoryBase; |
| 1331 | args.memory_size = stream->getLength(); |
| 1332 | } else { |
| 1333 | memset(&streamRec, 0, sizeof(streamRec)); |
| 1334 | streamRec.size = stream->read(NULL, 0); |
| 1335 | streamRec.descriptor.pointer = stream; |
| 1336 | streamRec.read = sk_stream_read; |
| 1337 | streamRec.close = sk_stream_close; |
| 1338 | |
| 1339 | args.flags = FT_OPEN_STREAM; |
| 1340 | args.stream = &streamRec; |
| 1341 | } |
| 1342 | |
| 1343 | FT_Face face; |
| 1344 | if (FT_Open_Face(library, &args, 0, &face)) { |
| 1345 | FT_Done_FreeType(library); |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1346 | return false; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1347 | } |
| 1348 | |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1349 | int tempStyle = SkTypeface::kNormal; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1350 | if (face->style_flags & FT_STYLE_FLAG_BOLD) { |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1351 | tempStyle |= SkTypeface::kBold; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1352 | } |
| 1353 | if (face->style_flags & FT_STYLE_FLAG_ITALIC) { |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1354 | tempStyle |= SkTypeface::kItalic; |
| 1355 | } |
| 1356 | |
| 1357 | if (name) { |
| 1358 | name->set(face->family_name); |
| 1359 | } |
| 1360 | if (style) { |
| 1361 | *style = (SkTypeface::Style) tempStyle; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1362 | } |
reed@google.com | 5b31b0f | 2011-02-23 14:41:42 +0000 | [diff] [blame] | 1363 | if (isFixedWidth) { |
| 1364 | *isFixedWidth = FT_IS_FIXED_WIDTH(face); |
| 1365 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1366 | |
| 1367 | FT_Done_Face(face); |
| 1368 | FT_Done_FreeType(library); |
djsollen@google.com | 4dc686d | 2012-02-15 21:03:45 +0000 | [diff] [blame] | 1369 | return true; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1370 | } |
scroggo@google.com | 94bc60f | 2012-10-04 20:45:06 +0000 | [diff] [blame] | 1371 | |