1 /* 2 * Copyright 2013 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 8 #include "SkAdvancedTypefaceMetrics.h" 9 #include "SkData.h" 10 #include "SkFixed.h" 11 #include "SkFontMgr.h" 12 #include "SkMakeUnique.h" 13 #include "SkOTTable_OS_2.h" 14 #include "SkSFNTHeader.h" 15 #include "SkStream.h" 16 #include "SkRefCnt.h" 17 #include "SkTypeface.h" 18 #include "SkTypefaceCache.h" 19 #include "Resources.h" 20 #include "Test.h" 21 22 #include <memory> 23 24 static void TypefaceStyle_test(skiatest::Reporter* reporter, 25 uint16_t weight, uint16_t width, SkData* data) 26 { 27 sk_sp<SkData> dataCopy; 28 if (!data->unique()) { 29 dataCopy = SkData::MakeWithCopy(data->data(), data->size()); 30 data = dataCopy.get(); 31 } 32 SkSFNTHeader* sfntHeader = static_cast<SkSFNTHeader*>(data->writable_data()); 33 34 SkSFNTHeader::TableDirectoryEntry* tableEntry = 35 SkTAfter<SkSFNTHeader::TableDirectoryEntry>(sfntHeader); 36 SkSFNTHeader::TableDirectoryEntry* os2TableEntry = nullptr; 37 int numTables = SkEndian_SwapBE16(sfntHeader->numTables); 38 for (int tableEntryIndex = 0; tableEntryIndex < numTables; ++tableEntryIndex) { 39 if (SkOTTableOS2::TAG == tableEntry[tableEntryIndex].tag) { 40 os2TableEntry = tableEntry + tableEntryIndex; 41 break; 42 } 43 } 44 SkASSERT_RELEASE(os2TableEntry); 45 46 size_t os2TableOffset = SkEndian_SwapBE32(os2TableEntry->offset); 47 SkOTTableOS2_V0* os2Table = SkTAddOffset<SkOTTableOS2_V0>(sfntHeader, os2TableOffset); 48 os2Table->usWeightClass.value = SkEndian_SwapBE16(weight); 49 using WidthType = SkOTTableOS2_V0::WidthClass::Value; 50 os2Table->usWidthClass.value = static_cast<WidthType>(SkEndian_SwapBE16(width)); 51 52 sk_sp<SkTypeface> newTypeface(SkTypeface::MakeFromStream(new SkMemoryStream(sk_ref_sp(data)))); 53 SkASSERT_RELEASE(newTypeface); 54 55 SkFontStyle newStyle = newTypeface->fontStyle(); 56 57 //printf("%d, %f\n", weight, (newStyle.weight() - (float)0x7FFF) / (float)0x7FFF); 58 //printf("%d, %f\n", width , (newStyle.width() - (float)0x7F) / (float)0x7F); 59 //printf("%d, %d\n", weight, newStyle.weight()); 60 //printf("%d, %d\n", width , newStyle.width()); 61 62 // Some back-ends (CG, GDI, DW) support OS/2 version A which uses 0 - 10 (but all differently). 63 REPORTER_ASSERT(reporter, 64 newStyle.weight() == weight || 65 (weight <= 10 && newStyle.weight() == 100 * weight) || 66 (weight == 4 && newStyle.weight() == 350) || // GDI weirdness 67 (weight == 5 && newStyle.weight() == 400) || // GDI weirdness 68 (weight == 0 && newStyle.weight() == 1) || // DW weirdness 69 (weight == 1000 && newStyle.weight() == 999) // DW weirdness 70 ); 71 72 // Some back-ends (GDI) don't support width, ensure these always report 'medium'. 73 REPORTER_ASSERT(reporter, 74 newStyle.width() == width || 75 newStyle.width() == 5); 76 } 77 DEF_TEST(TypefaceStyle, reporter) { 78 std::unique_ptr<SkStreamAsset> stream(GetResourceAsStream("/fonts/Em.ttf")); 79 if (!stream) { 80 REPORT_FAILURE(reporter, "/fonts/Em.ttf", SkString("Cannot load resource")); 81 return; 82 } 83 sk_sp<SkData> data(SkData::MakeFromStream(stream.get(), stream->getLength())); 84 85 using SkFS = SkFontStyle; 86 for (int weight = SkFS::kInvisible_Weight; weight <= SkFS::kExtraBlack_Weight; ++weight) { 87 TypefaceStyle_test(reporter, weight, 5, data.get()); 88 } 89 for (int width = SkFS::kUltraCondensed_Width; width <= SkFS::kUltraExpanded_Width; ++width) { 90 TypefaceStyle_test(reporter, 400, width, data.get()); 91 } 92 } 93 94 DEF_TEST(TypefaceAxes, reporter) { 95 std::unique_ptr<SkStreamAsset> distortable(GetResourceAsStream("/fonts/Distortable.ttf")); 96 if (!distortable) { 97 REPORT_FAILURE(reporter, "distortable", SkString()); 98 return; 99 } 100 constexpr int numberOfAxesInDistortable = 1; 101 102 sk_sp<SkFontMgr> fm = SkFontMgr::RefDefault(); 103 // The position may be over specified. If there are multiple values for a given axis, 104 // ensure the last one since that's what css-fonts-4 requires. 105 const SkFontArguments::VariationPosition::Coordinate position[] = { 106 { SkSetFourByteTag('w','g','h','t'), 1.618033988749895f }, 107 { SkSetFourByteTag('w','g','h','t'), SK_ScalarSqrt2 }, 108 }; 109 SkFontArguments params; 110 params.setVariationDesignPosition({position, SK_ARRAY_COUNT(position)}); 111 // TODO: if axes are set and the back-end doesn't support them, should we create the typeface? 112 sk_sp<SkTypeface> typeface(fm->createFromStream(distortable.release(), params)); 113 114 int count = typeface->getVariationDesignPosition(nullptr, 0); 115 if (count == -1) { 116 return; 117 } 118 REPORTER_ASSERT(reporter, count == numberOfAxesInDistortable); 119 120 SkFontArguments::VariationPosition::Coordinate positionRead[numberOfAxesInDistortable]; 121 count = typeface->getVariationDesignPosition(positionRead, SK_ARRAY_COUNT(positionRead)); 122 REPORTER_ASSERT(reporter, count == SK_ARRAY_COUNT(positionRead)); 123 124 REPORTER_ASSERT(reporter, positionRead[0].axis == position[1].axis); 125 126 // Convert to fixed for "almost equal". 127 SkFixed fixedRead = SkScalarToFixed(positionRead[0].value); 128 SkFixed fixedOriginal = SkScalarToFixed(position[1].value); 129 REPORTER_ASSERT(reporter, fixedRead == fixedOriginal); 130 } 131 132 DEF_TEST(TypefaceVariationIndex, reporter) { 133 std::unique_ptr<SkStreamAsset> distortable(GetResourceAsStream("/fonts/Distortable.ttf")); 134 if (!distortable) { 135 REPORT_FAILURE(reporter, "distortable", SkString()); 136 return; 137 } 138 139 sk_sp<SkFontMgr> fm = SkFontMgr::RefDefault(); 140 SkFontArguments params; 141 // The first named variation position in Distortable is 'Thin'. 142 params.setCollectionIndex(0x00010000); 143 sk_sp<SkTypeface> typeface(fm->createFromStream(distortable.release(), params)); 144 if (!typeface) { 145 // FreeType is the only weird thing that supports this, Skia just needs to make sure if it 146 // gets one of these things make sense. 147 return; 148 } 149 150 int count = typeface->getVariationDesignPosition(nullptr, 0); 151 if (!(count == 1)) { 152 REPORT_FAILURE(reporter, "count == 1", SkString()); 153 return; 154 } 155 156 SkFontArguments::VariationPosition::Coordinate positionRead[1]; 157 count = typeface->getVariationDesignPosition(positionRead, SK_ARRAY_COUNT(positionRead)); 158 if (count == -1) { 159 return; 160 } 161 if (!(count == 1)) { 162 REPORT_FAILURE(reporter, "count == 1", SkString()); 163 return; 164 } 165 REPORTER_ASSERT(reporter, positionRead[0].axis == SkSetFourByteTag('w','g','h','t')); 166 REPORTER_ASSERT(reporter, positionRead[0].value == 0.5); 167 } 168 169 DEF_TEST(Typeface, reporter) { 170 171 sk_sp<SkTypeface> t1(SkTypeface::MakeFromName(nullptr, SkFontStyle())); 172 sk_sp<SkTypeface> t2(SkTypeface::MakeDefault(SkTypeface::kNormal)); 173 174 REPORTER_ASSERT(reporter, SkTypeface::Equal(t1.get(), t2.get())); 175 REPORTER_ASSERT(reporter, SkTypeface::Equal(0, t1.get())); 176 REPORTER_ASSERT(reporter, SkTypeface::Equal(0, t2.get())); 177 REPORTER_ASSERT(reporter, SkTypeface::Equal(t1.get(), 0)); 178 REPORTER_ASSERT(reporter, SkTypeface::Equal(t2.get(), 0)); 179 180 #ifdef SK_BUILD_FOR_ANDROID 181 sk_sp<SkTypeface> t3(SkTypeface::MakeFromName("non-existent-font", SkFontStyle())); 182 REPORTER_ASSERT(reporter, nullptr == t3); 183 #endif 184 } 185 186 namespace { 187 188 class SkEmptyTypeface : public SkTypeface { 189 public: 190 static sk_sp<SkTypeface> Create() { return sk_sp<SkTypeface>(new SkEmptyTypeface()); } 191 protected: 192 SkEmptyTypeface() : SkTypeface(SkFontStyle(), true) { } 193 194 SkStreamAsset* onOpenStream(int* ttcIndex) const override { return nullptr; } 195 SkScalerContext* onCreateScalerContext(const SkScalerContextEffects&, 196 const SkDescriptor*) const override { 197 return nullptr; 198 } 199 void onFilterRec(SkScalerContextRec*) const override { } 200 std::unique_ptr<SkAdvancedTypefaceMetrics> onGetAdvancedMetrics() const override { 201 return nullptr; 202 } 203 void onGetFontDescriptor(SkFontDescriptor*, bool*) const override { } 204 virtual int onCharsToGlyphs(const void* chars, Encoding encoding, 205 uint16_t glyphs[], int glyphCount) const override { 206 SK_ABORT("unimplemented"); 207 return 0; 208 } 209 int onCountGlyphs() const override { return 0; } 210 int onGetUPEM() const override { return 0; } 211 void onGetFamilyName(SkString* familyName) const override { familyName->reset(); } 212 SkTypeface::LocalizedStrings* onCreateFamilyNameIterator() const override { 213 SK_ABORT("unimplemented"); 214 return nullptr; 215 } 216 int onGetVariationDesignPosition(SkFontArguments::VariationPosition::Coordinate coordinates[], 217 int coordinateCount) const override 218 { 219 return 0; 220 } 221 int onGetTableTags(SkFontTableTag tags[]) const override { return 0; } 222 size_t onGetTableData(SkFontTableTag, size_t, size_t, void*) const override { return 0; } 223 }; 224 225 } 226 227 static bool count_proc(SkTypeface* face, void* ctx) { 228 int* count = static_cast<int*>(ctx); 229 *count = *count + 1; 230 return false; 231 } 232 static int count(skiatest::Reporter* reporter, const SkTypefaceCache& cache) { 233 int count = 0; 234 SkTypeface* none = cache.findByProcAndRef(count_proc, &count); 235 REPORTER_ASSERT(reporter, none == nullptr); 236 return count; 237 } 238 239 DEF_TEST(TypefaceCache, reporter) { 240 sk_sp<SkTypeface> t1(SkEmptyTypeface::Create()); 241 { 242 SkTypefaceCache cache; 243 REPORTER_ASSERT(reporter, count(reporter, cache) == 0); 244 { 245 sk_sp<SkTypeface> t0(SkEmptyTypeface::Create()); 246 cache.add(t0.get()); 247 REPORTER_ASSERT(reporter, count(reporter, cache) == 1); 248 cache.add(t1.get()); 249 REPORTER_ASSERT(reporter, count(reporter, cache) == 2); 250 cache.purgeAll(); 251 REPORTER_ASSERT(reporter, count(reporter, cache) == 2); 252 } 253 REPORTER_ASSERT(reporter, count(reporter, cache) == 2); 254 cache.purgeAll(); 255 REPORTER_ASSERT(reporter, count(reporter, cache) == 1); 256 } 257 REPORTER_ASSERT(reporter, t1->unique()); 258 } 259
