1 /*
2 * Copyright 2014 Google Inc.
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 #include "src/utils/win/SkDWriteNTDDI_VERSION.h"
8
9 #include "include/core/SkTypes.h"
10 #if defined(SK_BUILD_FOR_WIN)
11
12 #include "src/core/SkLeanWindows.h"
13
14 // SkLeanWindows will include Windows.h, which will pull in all of the GDI defines.
15 // GDI #defines GetGlyphIndices to GetGlyphIndicesA or GetGlyphIndicesW, but
16 // IDWriteFontFace has a method called GetGlyphIndices. Since this file does
17 // not use GDI, undefing GetGlyphIndices makes things less confusing.
18 #undef GetGlyphIndices
19
20 #include "include/core/SkData.h"
21 #include "include/private/SkTo.h"
22 #include "src/core/SkFontDescriptor.h"
23 #include "src/core/SkFontStream.h"
24 #include "src/core/SkScalerContext.h"
25 #include "src/ports/SkScalerContext_win_dw.h"
26 #include "src/ports/SkTypeface_win_dw.h"
27 #include "src/sfnt/SkOTTable_OS_2.h"
28 #include "src/sfnt/SkOTTable_fvar.h"
29 #include "src/sfnt/SkOTTable_head.h"
30 #include "src/sfnt/SkOTTable_hhea.h"
31 #include "src/sfnt/SkOTTable_post.h"
32 #include "src/sfnt/SkOTUtils.h"
33 #include "src/utils/win/SkDWrite.h"
34 #include "src/utils/win/SkDWriteFontFileStream.h"
35
~Loaders()36 DWriteFontTypeface::Loaders::~Loaders() {
37 // Don't return if any fail, just keep going to free up as much as possible.
38 HRESULT hr;
39
40 hr = fFactory->UnregisterFontCollectionLoader(fDWriteFontCollectionLoader.get());
41 if (FAILED(hr)) {
42 SK_TRACEHR(hr, "FontCollectionLoader");
43 }
44
45 hr = fFactory->UnregisterFontFileLoader(fDWriteFontFileLoader.get());
46 if (FAILED(hr)) {
47 SK_TRACEHR(hr, "FontFileLoader");
48 }
49 }
50
onGetFamilyName(SkString * familyName) const51 void DWriteFontTypeface::onGetFamilyName(SkString* familyName) const {
52 SkTScopedComPtr<IDWriteLocalizedStrings> familyNames;
53 HRV(fDWriteFontFamily->GetFamilyNames(&familyNames));
54
55 sk_get_locale_string(familyNames.get(), nullptr/*fMgr->fLocaleName.get()*/, familyName);
56 }
57
onGetPostScriptName(SkString * skPostScriptName) const58 bool DWriteFontTypeface::onGetPostScriptName(SkString* skPostScriptName) const {
59 SkString localSkPostScriptName;
60 SkTScopedComPtr<IDWriteLocalizedStrings> postScriptNames;
61 BOOL exists = FALSE;
62 if (FAILED(fDWriteFont->GetInformationalStrings(
63 DWRITE_INFORMATIONAL_STRING_POSTSCRIPT_NAME,
64 &postScriptNames,
65 &exists)) ||
66 !exists ||
67 FAILED(sk_get_locale_string(postScriptNames.get(), nullptr, &localSkPostScriptName)))
68 {
69 return false;
70 }
71 if (skPostScriptName) {
72 *skPostScriptName = localSkPostScriptName;
73 }
74 return true;
75 }
76
onGetFontDescriptor(SkFontDescriptor * desc,bool * isLocalStream) const77 void DWriteFontTypeface::onGetFontDescriptor(SkFontDescriptor* desc,
78 bool* isLocalStream) const {
79 // Get the family name.
80 SkTScopedComPtr<IDWriteLocalizedStrings> familyNames;
81 HRV(fDWriteFontFamily->GetFamilyNames(&familyNames));
82
83 SkString utf8FamilyName;
84 sk_get_locale_string(familyNames.get(), nullptr/*fMgr->fLocaleName.get()*/, &utf8FamilyName);
85
86 desc->setFamilyName(utf8FamilyName.c_str());
87 desc->setStyle(this->fontStyle());
88 *isLocalStream = SkToBool(fLoaders);
89 }
90
onCharsToGlyphs(const SkUnichar * uni,int count,SkGlyphID glyphs[]) const91 void DWriteFontTypeface::onCharsToGlyphs(const SkUnichar* uni, int count,
92 SkGlyphID glyphs[]) const {
93 fDWriteFontFace->GetGlyphIndices((const UINT32*)uni, count, glyphs);
94 }
95
onCountGlyphs() const96 int DWriteFontTypeface::onCountGlyphs() const {
97 return fDWriteFontFace->GetGlyphCount();
98 }
99
getPostScriptGlyphNames(SkString *) const100 void DWriteFontTypeface::getPostScriptGlyphNames(SkString*) const {}
101
onGetUPEM() const102 int DWriteFontTypeface::onGetUPEM() const {
103 DWRITE_FONT_METRICS metrics;
104 fDWriteFontFace->GetMetrics(&metrics);
105 return metrics.designUnitsPerEm;
106 }
107
108 class LocalizedStrings_IDWriteLocalizedStrings : public SkTypeface::LocalizedStrings {
109 public:
110 /** Takes ownership of the IDWriteLocalizedStrings. */
LocalizedStrings_IDWriteLocalizedStrings(IDWriteLocalizedStrings * strings)111 explicit LocalizedStrings_IDWriteLocalizedStrings(IDWriteLocalizedStrings* strings)
112 : fIndex(0), fStrings(strings)
113 { }
114
next(SkTypeface::LocalizedString * localizedString)115 bool next(SkTypeface::LocalizedString* localizedString) override {
116 if (fIndex >= fStrings->GetCount()) {
117 return false;
118 }
119
120 // String
121 UINT32 stringLen;
122 HRBM(fStrings->GetStringLength(fIndex, &stringLen), "Could not get string length.");
123
124 SkSMallocWCHAR wString(static_cast<size_t>(stringLen)+1);
125 HRBM(fStrings->GetString(fIndex, wString.get(), stringLen+1), "Could not get string.");
126
127 HRB(sk_wchar_to_skstring(wString.get(), stringLen, &localizedString->fString));
128
129 // Locale
130 UINT32 localeLen;
131 HRBM(fStrings->GetLocaleNameLength(fIndex, &localeLen), "Could not get locale length.");
132
133 SkSMallocWCHAR wLocale(static_cast<size_t>(localeLen)+1);
134 HRBM(fStrings->GetLocaleName(fIndex, wLocale.get(), localeLen+1), "Could not get locale.");
135
136 HRB(sk_wchar_to_skstring(wLocale.get(), localeLen, &localizedString->fLanguage));
137
138 ++fIndex;
139 return true;
140 }
141
142 private:
143 UINT32 fIndex;
144 SkTScopedComPtr<IDWriteLocalizedStrings> fStrings;
145 };
146
onCreateFamilyNameIterator() const147 SkTypeface::LocalizedStrings* DWriteFontTypeface::onCreateFamilyNameIterator() const {
148 sk_sp<SkTypeface::LocalizedStrings> nameIter =
149 SkOTUtils::LocalizedStrings_NameTable::MakeForFamilyNames(*this);
150 if (!nameIter) {
151 SkTScopedComPtr<IDWriteLocalizedStrings> familyNames;
152 HRNM(fDWriteFontFamily->GetFamilyNames(&familyNames), "Could not obtain family names.");
153 nameIter = sk_make_sp<LocalizedStrings_IDWriteLocalizedStrings>(familyNames.release());
154 }
155 return nameIter.release();
156 }
157
onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[],int coordinateCount) const158 int DWriteFontTypeface::onGetVariationDesignPosition(
159 SkFontArguments::VariationPosition::Coordinate coordinates[], int coordinateCount) const
160 {
161
162 #if defined(NTDDI_WIN10_RS3) && NTDDI_VERSION >= NTDDI_WIN10_RS3
163
164 SkTScopedComPtr<IDWriteFontFace5> fontFace5;
165 if (FAILED(fDWriteFontFace->QueryInterface(&fontFace5))) {
166 return -1;
167 }
168
169 // Return 0 if the font is not variable font.
170 if (!fontFace5->HasVariations()) {
171 return 0;
172 }
173
174 UINT32 fontAxisCount = fontFace5->GetFontAxisValueCount();
175 SkTScopedComPtr<IDWriteFontResource> fontResource;
176 HR_GENERAL(fontFace5->GetFontResource(&fontResource), nullptr, -1);
177 UINT32 variableAxisCount = 0;
178 for (UINT32 i = 0; i < fontAxisCount; ++i) {
179 if (fontResource->GetFontAxisAttributes(i) & DWRITE_FONT_AXIS_ATTRIBUTES_VARIABLE) {
180 ++variableAxisCount;
181 }
182 }
183
184 if (!coordinates || coordinateCount < 0 || (unsigned)coordinateCount < variableAxisCount) {
185 return SkTo<int>(variableAxisCount);
186 }
187
188 SkAutoSTMalloc<8, DWRITE_FONT_AXIS_VALUE> fontAxisValue(fontAxisCount);
189 HR_GENERAL(fontFace5->GetFontAxisValues(fontAxisValue.get(), fontAxisCount), nullptr, -1);
190 UINT32 coordIndex = 0;
191 for (UINT32 axisIndex = 0; axisIndex < fontAxisCount; ++axisIndex) {
192 if (fontResource->GetFontAxisAttributes(axisIndex) & DWRITE_FONT_AXIS_ATTRIBUTES_VARIABLE) {
193 coordinates[coordIndex].axis = SkEndian_SwapBE32(fontAxisValue[axisIndex].axisTag);
194 coordinates[coordIndex].value = fontAxisValue[axisIndex].value;
195 ++coordIndex;
196 }
197 }
198
199 SkASSERT(coordIndex == variableAxisCount);
200 return SkTo<int>(variableAxisCount);
201
202 #endif
203
204 return -1;
205 }
206
onGetVariationDesignParameters(SkFontParameters::Variation::Axis parameters[],int parameterCount) const207 int DWriteFontTypeface::onGetVariationDesignParameters(
208 SkFontParameters::Variation::Axis parameters[], int parameterCount) const
209 {
210
211 #if defined(NTDDI_WIN10_RS3) && NTDDI_VERSION >= NTDDI_WIN10_RS3
212
213 SkTScopedComPtr<IDWriteFontFace5> fontFace5;
214 if (FAILED(fDWriteFontFace->QueryInterface(&fontFace5))) {
215 return -1;
216 }
217
218 // Return 0 if the font is not variable font.
219 if (!fontFace5->HasVariations()) {
220 return 0;
221 }
222
223 UINT32 fontAxisCount = fontFace5->GetFontAxisValueCount();
224 SkTScopedComPtr<IDWriteFontResource> fontResource;
225 HR_GENERAL(fontFace5->GetFontResource(&fontResource), nullptr, -1);
226 int variableAxisCount = 0;
227 for (UINT32 i = 0; i < fontAxisCount; ++i) {
228 if (fontResource->GetFontAxisAttributes(i) & DWRITE_FONT_AXIS_ATTRIBUTES_VARIABLE) {
229 variableAxisCount++;
230 }
231 }
232
233 if (!parameters || parameterCount < variableAxisCount) {
234 return variableAxisCount;
235 }
236
237 SkAutoSTMalloc<8, DWRITE_FONT_AXIS_RANGE> fontAxisRange(fontAxisCount);
238 HR_GENERAL(fontResource->GetFontAxisRanges(fontAxisRange.get(), fontAxisCount), nullptr, -1);
239 SkAutoSTMalloc<8, DWRITE_FONT_AXIS_VALUE> fontAxisDefaultValue(fontAxisCount);
240 HR_GENERAL(fontResource->GetDefaultFontAxisValues(fontAxisDefaultValue.get(), fontAxisCount),
241 nullptr, -1);
242 UINT32 coordIndex = 0;
243
244 for (UINT32 axisIndex = 0; axisIndex < fontAxisCount; ++axisIndex) {
245 if (fontResource->GetFontAxisAttributes(axisIndex) & DWRITE_FONT_AXIS_ATTRIBUTES_VARIABLE) {
246 parameters[coordIndex].tag = SkEndian_SwapBE32(fontAxisDefaultValue[axisIndex].axisTag);
247 parameters[coordIndex].min = fontAxisRange[axisIndex].minValue;
248 parameters[coordIndex].def = fontAxisDefaultValue[axisIndex].value;
249 parameters[coordIndex].max = fontAxisRange[axisIndex].maxValue;
250 parameters[coordIndex].setHidden(fontResource->GetFontAxisAttributes(axisIndex) &
251 DWRITE_FONT_AXIS_ATTRIBUTES_HIDDEN);
252 ++coordIndex;
253 }
254 }
255
256 return variableAxisCount;
257
258 #endif
259
260 return -1;
261 }
262
onGetTableTags(SkFontTableTag tags[]) const263 int DWriteFontTypeface::onGetTableTags(SkFontTableTag tags[]) const {
264 DWRITE_FONT_FACE_TYPE type = fDWriteFontFace->GetType();
265 if (type != DWRITE_FONT_FACE_TYPE_CFF &&
266 type != DWRITE_FONT_FACE_TYPE_TRUETYPE &&
267 type != DWRITE_FONT_FACE_TYPE_TRUETYPE_COLLECTION)
268 {
269 return 0;
270 }
271
272 int ttcIndex;
273 std::unique_ptr<SkStreamAsset> stream = this->openStream(&ttcIndex);
274 return stream.get() ? SkFontStream::GetTableTags(stream.get(), ttcIndex, tags) : 0;
275 }
276
onGetTableData(SkFontTableTag tag,size_t offset,size_t length,void * data) const277 size_t DWriteFontTypeface::onGetTableData(SkFontTableTag tag, size_t offset,
278 size_t length, void* data) const
279 {
280 AutoDWriteTable table(fDWriteFontFace.get(), SkEndian_SwapBE32(tag));
281 if (!table.fExists) {
282 return 0;
283 }
284
285 if (offset > table.fSize) {
286 return 0;
287 }
288 size_t size = std::min(length, table.fSize - offset);
289 if (data) {
290 memcpy(data, table.fData + offset, size);
291 }
292
293 return size;
294 }
295
onCopyTableData(SkFontTableTag tag) const296 sk_sp<SkData> DWriteFontTypeface::onCopyTableData(SkFontTableTag tag) const {
297 const uint8_t* data;
298 UINT32 size;
299 void* lock;
300 BOOL exists;
301 fDWriteFontFace->TryGetFontTable(SkEndian_SwapBE32(tag),
302 reinterpret_cast<const void **>(&data), &size, &lock, &exists);
303 if (!exists) {
304 return nullptr;
305 }
306 struct Context {
307 Context(void* lock, IDWriteFontFace* face) : fLock(lock), fFontFace(SkRefComPtr(face)) {}
308 ~Context() { fFontFace->ReleaseFontTable(fLock); }
309 void* fLock;
310 SkTScopedComPtr<IDWriteFontFace> fFontFace;
311 };
312 return SkData::MakeWithProc(data, size,
313 [](const void*, void* ctx) { delete (Context*)ctx; },
314 new Context(lock, fDWriteFontFace.get()));
315 }
316
onMakeClone(const SkFontArguments & args) const317 sk_sp<SkTypeface> DWriteFontTypeface::onMakeClone(const SkFontArguments& args) const {
318 // Skip if the current face index does not match the ttcIndex
319 if (fDWriteFontFace->GetIndex() != SkTo<UINT32>(args.getCollectionIndex())) {
320 return sk_ref_sp(this);
321 }
322
323 #if defined(NTDDI_WIN10_RS3) && NTDDI_VERSION >= NTDDI_WIN10_RS3
324
325 SkTScopedComPtr<IDWriteFontFace5> fontFace5;
326
327 if (SUCCEEDED(fDWriteFontFace->QueryInterface(&fontFace5)) && fontFace5->HasVariations()) {
328 UINT32 fontAxisCount = fontFace5->GetFontAxisValueCount();
329 UINT32 argsCoordCount = args.getVariationDesignPosition().coordinateCount;
330 SkAutoSTMalloc<8, DWRITE_FONT_AXIS_VALUE> fontAxisValue(fontAxisCount);
331 HRN(fontFace5->GetFontAxisValues(fontAxisValue.get(), fontAxisCount));
332
333 for (UINT32 fontIndex = 0; fontIndex < fontAxisCount; ++fontIndex) {
334 for (UINT32 argsIndex = 0; argsIndex < argsCoordCount; ++argsIndex) {
335 if (SkEndian_SwapBE32(fontAxisValue[fontIndex].axisTag) ==
336 args.getVariationDesignPosition().coordinates[argsIndex].axis) {
337 fontAxisValue[fontIndex].value =
338 args.getVariationDesignPosition().coordinates[argsIndex].value;
339 }
340 }
341 }
342 SkTScopedComPtr<IDWriteFontResource> fontResource;
343 HRN(fontFace5->GetFontResource(&fontResource));
344 SkTScopedComPtr<IDWriteFontFace5> newFontFace5;
345 HRN(fontResource->CreateFontFace(fDWriteFont->GetSimulations(),
346 fontAxisValue.get(),
347 fontAxisCount,
348 &newFontFace5));
349
350 SkTScopedComPtr<IDWriteFontFace> newFontFace;
351 HRN(newFontFace5->QueryInterface(&newFontFace));
352 return DWriteFontTypeface::Make(fFactory.get(),
353 newFontFace.get(),
354 fDWriteFont.get(),
355 fDWriteFontFamily.get(),
356 fLoaders);
357 }
358
359 #endif
360
361 return sk_ref_sp(this);
362 }
363
onOpenStream(int * ttcIndex) const364 std::unique_ptr<SkStreamAsset> DWriteFontTypeface::onOpenStream(int* ttcIndex) const {
365 *ttcIndex = fDWriteFontFace->GetIndex();
366
367 UINT32 numFiles = 0;
368 HRNM(fDWriteFontFace->GetFiles(&numFiles, nullptr),
369 "Could not get number of font files.");
370 if (numFiles != 1) {
371 return nullptr;
372 }
373
374 SkTScopedComPtr<IDWriteFontFile> fontFile;
375 HRNM(fDWriteFontFace->GetFiles(&numFiles, &fontFile), "Could not get font files.");
376
377 const void* fontFileKey;
378 UINT32 fontFileKeySize;
379 HRNM(fontFile->GetReferenceKey(&fontFileKey, &fontFileKeySize),
380 "Could not get font file reference key.");
381
382 SkTScopedComPtr<IDWriteFontFileLoader> fontFileLoader;
383 HRNM(fontFile->GetLoader(&fontFileLoader), "Could not get font file loader.");
384
385 SkTScopedComPtr<IDWriteFontFileStream> fontFileStream;
386 HRNM(fontFileLoader->CreateStreamFromKey(fontFileKey, fontFileKeySize,
387 &fontFileStream),
388 "Could not create font file stream.");
389
390 return std::unique_ptr<SkStreamAsset>(new SkDWriteFontFileStream(fontFileStream.get()));
391 }
392
onCreateScalerContext(const SkScalerContextEffects & effects,const SkDescriptor * desc) const393 std::unique_ptr<SkScalerContext> DWriteFontTypeface::onCreateScalerContext(
394 const SkScalerContextEffects& effects, const SkDescriptor* desc) const
395 {
396 return std::make_unique<SkScalerContext_DW>(
397 sk_ref_sp(const_cast<DWriteFontTypeface*>(this)), effects, desc);
398 }
399
onFilterRec(SkScalerContextRec * rec) const400 void DWriteFontTypeface::onFilterRec(SkScalerContextRec* rec) const {
401 if (rec->fFlags & SkScalerContext::kLCD_Vertical_Flag) {
402 rec->fMaskFormat = SkMask::kA8_Format;
403 rec->fFlags |= SkScalerContext::kGenA8FromLCD_Flag;
404 }
405
406 unsigned flagsWeDontSupport = SkScalerContext::kForceAutohinting_Flag |
407 SkScalerContext::kEmbolden_Flag |
408 SkScalerContext::kLCD_Vertical_Flag;
409 rec->fFlags &= ~flagsWeDontSupport;
410
411 SkFontHinting h = rec->getHinting();
412 // DirectWrite2 allows for hinting to be turned off. Force everything else to normal.
413 if (h != SkFontHinting::kNone || !fFactory2 || !fDWriteFontFace2) {
414 h = SkFontHinting::kNormal;
415 }
416 rec->setHinting(h);
417
418 #if defined(SK_FONT_HOST_USE_SYSTEM_SETTINGS)
419 IDWriteFactory* factory = sk_get_dwrite_factory();
420 if (factory != nullptr) {
421 SkTScopedComPtr<IDWriteRenderingParams> defaultRenderingParams;
422 if (SUCCEEDED(factory->CreateRenderingParams(&defaultRenderingParams))) {
423 float gamma = defaultRenderingParams->GetGamma();
424 rec->setDeviceGamma(gamma);
425 rec->setPaintGamma(gamma);
426
427 rec->setContrast(defaultRenderingParams->GetEnhancedContrast());
428 }
429 }
430 #endif
431 }
432
433 ///////////////////////////////////////////////////////////////////////////////
434 //PDF Support
435
glyph_to_unicode_map(IDWriteFontFace * fontFace,DWRITE_UNICODE_RANGE range,UINT32 * remainingGlyphCount,UINT32 numGlyphs,SkUnichar * glyphToUnicode)436 static void glyph_to_unicode_map(IDWriteFontFace* fontFace, DWRITE_UNICODE_RANGE range,
437 UINT32* remainingGlyphCount, UINT32 numGlyphs,
438 SkUnichar* glyphToUnicode)
439 {
440 constexpr const int batchSize = 128;
441 UINT32 codepoints[batchSize];
442 UINT16 glyphs[batchSize];
443 for (UINT32 c = range.first; c <= range.last && *remainingGlyphCount != 0; c += batchSize) {
444 UINT32 numBatchedCodePoints = std::min<UINT32>(range.last - c + 1, batchSize);
445 for (UINT32 i = 0; i < numBatchedCodePoints; ++i) {
446 codepoints[i] = c + i;
447 }
448 HRVM(fontFace->GetGlyphIndices(codepoints, numBatchedCodePoints, glyphs),
449 "Failed to get glyph indexes.");
450 for (UINT32 i = 0; i < numBatchedCodePoints; ++i) {
451 UINT16 glyph = glyphs[i];
452 // Intermittent DW bug on Windows 10. See crbug.com/470146.
453 if (glyph >= numGlyphs) {
454 return;
455 }
456 if (0 < glyph && glyphToUnicode[glyph] == 0) {
457 glyphToUnicode[glyph] = c + i; // Always use lowest-index unichar.
458 --*remainingGlyphCount;
459 }
460 }
461 }
462 }
463
getGlyphToUnicodeMap(SkUnichar * glyphToUnicode) const464 void DWriteFontTypeface::getGlyphToUnicodeMap(SkUnichar* glyphToUnicode) const {
465 IDWriteFontFace* face = fDWriteFontFace.get();
466 UINT32 numGlyphs = face->GetGlyphCount();
467 sk_bzero(glyphToUnicode, sizeof(SkUnichar) * numGlyphs);
468 UINT32 remainingGlyphCount = numGlyphs;
469
470 if (fDWriteFontFace1) {
471 IDWriteFontFace1* face1 = fDWriteFontFace1.get();
472 UINT32 numRanges = 0;
473 HRESULT hr = face1->GetUnicodeRanges(0, nullptr, &numRanges);
474 if (hr != E_NOT_SUFFICIENT_BUFFER && FAILED(hr)) {
475 HRVM(hr, "Failed to get number of ranges.");
476 }
477 std::unique_ptr<DWRITE_UNICODE_RANGE[]> ranges(new DWRITE_UNICODE_RANGE[numRanges]);
478 HRVM(face1->GetUnicodeRanges(numRanges, ranges.get(), &numRanges), "Failed to get ranges.");
479 for (UINT32 i = 0; i < numRanges; ++i) {
480 glyph_to_unicode_map(face1, ranges[i], &remainingGlyphCount, numGlyphs, glyphToUnicode);
481 }
482 } else {
483 glyph_to_unicode_map(face, {0, 0x10FFFF}, &remainingGlyphCount, numGlyphs, glyphToUnicode);
484 }
485 }
486
onGetAdvancedMetrics() const487 std::unique_ptr<SkAdvancedTypefaceMetrics> DWriteFontTypeface::onGetAdvancedMetrics() const {
488
489 std::unique_ptr<SkAdvancedTypefaceMetrics> info(nullptr);
490
491 DWRITE_FONT_METRICS dwfm;
492 fDWriteFontFace->GetMetrics(&dwfm);
493
494 info.reset(new SkAdvancedTypefaceMetrics);
495
496 info->fAscent = SkToS16(dwfm.ascent);
497 info->fDescent = SkToS16(dwfm.descent);
498 info->fCapHeight = SkToS16(dwfm.capHeight);
499
500 {
501 SkTScopedComPtr<IDWriteLocalizedStrings> postScriptNames;
502 BOOL exists = FALSE;
503 if (FAILED(fDWriteFont->GetInformationalStrings(
504 DWRITE_INFORMATIONAL_STRING_POSTSCRIPT_NAME,
505 &postScriptNames,
506 &exists)) ||
507 !exists ||
508 FAILED(sk_get_locale_string(postScriptNames.get(), nullptr, &info->fPostScriptName)))
509 {
510 SkDEBUGF("Unable to get postscript name for typeface %p\n", this);
511 }
512 }
513
514 // SkAdvancedTypefaceMetrics::fFontName must actually be a family name.
515 SkTScopedComPtr<IDWriteLocalizedStrings> familyNames;
516 if (FAILED(fDWriteFontFamily->GetFamilyNames(&familyNames)) ||
517 FAILED(sk_get_locale_string(familyNames.get(), nullptr, &info->fFontName)))
518 {
519 SkDEBUGF("Unable to get family name for typeface 0x%p\n", this);
520 }
521 if (info->fPostScriptName.isEmpty()) {
522 info->fPostScriptName = info->fFontName;
523 }
524
525 DWRITE_FONT_FACE_TYPE fontType = fDWriteFontFace->GetType();
526 if (fontType != DWRITE_FONT_FACE_TYPE_TRUETYPE &&
527 fontType != DWRITE_FONT_FACE_TYPE_TRUETYPE_COLLECTION)
528 {
529 return info;
530 }
531
532 // Simulated fonts aren't really TrueType fonts.
533 if (fDWriteFontFace->GetSimulations() == DWRITE_FONT_SIMULATIONS_NONE) {
534 info->fType = SkAdvancedTypefaceMetrics::kTrueType_Font;
535 }
536
537 AutoTDWriteTable<SkOTTableHead> headTable(fDWriteFontFace.get());
538 AutoTDWriteTable<SkOTTablePostScript> postTable(fDWriteFontFace.get());
539 AutoTDWriteTable<SkOTTableHorizontalHeader> hheaTable(fDWriteFontFace.get());
540 AutoTDWriteTable<SkOTTableOS2> os2Table(fDWriteFontFace.get());
541 if (!headTable.fExists || !postTable.fExists || !hheaTable.fExists || !os2Table.fExists) {
542 return info;
543 }
544
545 SkOTUtils::SetAdvancedTypefaceFlags(os2Table->version.v4.fsType, info.get());
546
547 // There are versions of DirectWrite which support named instances for system variation fonts,
548 // but no means to indicate that such a typeface is a variation.
549 AutoTDWriteTable<SkOTTableFontVariations> fvarTable(fDWriteFontFace.get());
550 if (fvarTable.fExists) {
551 info->fFlags |= SkAdvancedTypefaceMetrics::kVariable_FontFlag;
552 }
553
554 //There exist CJK fonts which set the IsFixedPitch and Monospace bits,
555 //but have full width, latin half-width, and half-width kana.
556 bool fixedWidth = (postTable->isFixedPitch &&
557 (1 == SkEndian_SwapBE16(hheaTable->numberOfHMetrics)));
558 //Monospace
559 if (fixedWidth) {
560 info->fStyle |= SkAdvancedTypefaceMetrics::kFixedPitch_Style;
561 }
562 //Italic
563 if (os2Table->version.v0.fsSelection.field.Italic) {
564 info->fStyle |= SkAdvancedTypefaceMetrics::kItalic_Style;
565 }
566 //Serif
567 using SerifStyle = SkPanose::Data::TextAndDisplay::SerifStyle;
568 SerifStyle serifStyle = os2Table->version.v0.panose.data.textAndDisplay.bSerifStyle;
569 if (SkPanose::FamilyType::TextAndDisplay == os2Table->version.v0.panose.bFamilyType) {
570 if (SerifStyle::Cove == serifStyle ||
571 SerifStyle::ObtuseCove == serifStyle ||
572 SerifStyle::SquareCove == serifStyle ||
573 SerifStyle::ObtuseSquareCove == serifStyle ||
574 SerifStyle::Square == serifStyle ||
575 SerifStyle::Thin == serifStyle ||
576 SerifStyle::Bone == serifStyle ||
577 SerifStyle::Exaggerated == serifStyle ||
578 SerifStyle::Triangle == serifStyle)
579 {
580 info->fStyle |= SkAdvancedTypefaceMetrics::kSerif_Style;
581 }
582 //Script
583 } else if (SkPanose::FamilyType::Script == os2Table->version.v0.panose.bFamilyType) {
584 info->fStyle |= SkAdvancedTypefaceMetrics::kScript_Style;
585 }
586
587 info->fItalicAngle = SkEndian_SwapBE32(postTable->italicAngle) >> 16;
588
589 info->fBBox = SkIRect::MakeLTRB((int32_t)SkEndian_SwapBE16((uint16_t)headTable->xMin),
590 (int32_t)SkEndian_SwapBE16((uint16_t)headTable->yMax),
591 (int32_t)SkEndian_SwapBE16((uint16_t)headTable->xMax),
592 (int32_t)SkEndian_SwapBE16((uint16_t)headTable->yMin));
593 return info;
594 }
595 #endif//defined(SK_BUILD_FOR_WIN)
596