1 /* 2 * Copyright 2012 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 "Resources.h" 9 #include "SkEndian.h" 10 #include "SkFontStream.h" 11 #include "SkOSFile.h" 12 #include "SkPaint.h" 13 #include "SkStream.h" 14 #include "SkTypeface.h" 15 #include "Test.h" 16 17 //#define DUMP_TABLES 18 //#define DUMP_TTC_TABLES 19 20 #define kFontTableTag_head SkSetFourByteTag('h', 'e', 'a', 'd') 21 #define kFontTableTag_hhea SkSetFourByteTag('h', 'h', 'e', 'a') 22 #define kFontTableTag_maxp SkSetFourByteTag('m', 'a', 'x', 'p') 23 24 static const struct TagSize { 25 SkFontTableTag fTag; 26 size_t fSize; 27 } gKnownTableSizes[] = { 28 { kFontTableTag_head, 54 }, 29 { kFontTableTag_hhea, 36 }, 30 }; 31 32 // Test that getUnitsPerEm() agrees with a direct lookup in the 'head' table 33 // (if that table is available). 34 static void test_unitsPerEm(skiatest::Reporter* reporter, SkTypeface* face) { 35 int nativeUPEM = face->getUnitsPerEm(); 36 37 int tableUPEM = -1; 38 size_t size = face->getTableSize(kFontTableTag_head); 39 if (size) { 40 // unitsPerEm is at offset 18 into the 'head' table. 41 uint16_t rawUPEM; 42 face->getTableData(kFontTableTag_head, 18, sizeof(rawUPEM), &rawUPEM); 43 tableUPEM = SkEndian_SwapBE16(rawUPEM); 44 } 45 46 if (tableUPEM >= 0) { 47 REPORTER_ASSERT(reporter, tableUPEM == nativeUPEM); 48 } 49 } 50 51 // Test that countGlyphs() agrees with a direct lookup in the 'maxp' table 52 // (if that table is available). 53 static void test_countGlyphs(skiatest::Reporter* reporter, SkTypeface* face) { 54 int nativeGlyphs = face->countGlyphs(); 55 56 int tableGlyphs = -1; 57 size_t size = face->getTableSize(kFontTableTag_maxp); 58 if (size) { 59 // glyphs is at offset 4 into the 'maxp' table. 60 uint16_t rawGlyphs; 61 face->getTableData(kFontTableTag_maxp, 4, sizeof(rawGlyphs), &rawGlyphs); 62 tableGlyphs = SkEndian_SwapBE16(rawGlyphs); 63 } 64 65 if (tableGlyphs >= 0) { 66 REPORTER_ASSERT(reporter, tableGlyphs == nativeGlyphs); 67 } 68 } 69 70 // The following three are all the same code points in various encodings. 71 // aa 72 static uint8_t utf8Chars[] = { 0x61, 0xE4,0xB8,0xAD, 0xD0,0xAF, 0xD7,0x99, 0xD7,0x95, 0xF0,0x9D,0x84,0x9E, 0x61, 0xF0,0xA0,0xAE,0x9F }; 73 static uint16_t utf16Chars[] = { 0x0061, 0x4E2D, 0x042F, 0x05D9, 0x05D5, 0xD834,0xDD1E, 0x0061, 0xD842,0xDF9F }; 74 static uint32_t utf32Chars[] = { 0x00000061, 0x00004E2D, 0x0000042F, 0x000005D9, 0x000005D5, 0x0001D11E, 0x00000061, 0x00020B9F }; 75 76 struct CharsToGlyphs_TestData { 77 const void* chars; 78 int charCount; 79 size_t charsByteLength; 80 SkTypeface::Encoding typefaceEncoding; 81 const char* name; 82 } static charsToGlyphs_TestData[] = { 83 { utf8Chars, 8, sizeof(utf8Chars), SkTypeface::kUTF8_Encoding, "Simple UTF-8" }, 84 { utf16Chars, 8, sizeof(utf16Chars), SkTypeface::kUTF16_Encoding, "Simple UTF-16" }, 85 { utf32Chars, 8, sizeof(utf32Chars), SkTypeface::kUTF32_Encoding, "Simple UTF-32" }, 86 }; 87 88 // Test that SkPaint::textToGlyphs agrees with SkTypeface::charsToGlyphs. 89 static void test_charsToGlyphs(skiatest::Reporter* reporter, SkTypeface* face) { 90 uint16_t paintGlyphIds[256]; 91 uint16_t faceGlyphIds[256]; 92 93 for (size_t testIndex = 0; testIndex < SK_ARRAY_COUNT(charsToGlyphs_TestData); ++testIndex) { 94 CharsToGlyphs_TestData& test = charsToGlyphs_TestData[testIndex]; 95 96 SkPaint paint; 97 paint.setTypeface(face); 98 paint.setTextEncoding((SkPaint::TextEncoding)test.typefaceEncoding); 99 paint.textToGlyphs(test.chars, test.charsByteLength, paintGlyphIds); 100 101 face->charsToGlyphs(test.chars, test.typefaceEncoding, faceGlyphIds, test.charCount); 102 103 for (int i = 0; i < test.charCount; ++i) { 104 SkString name; 105 face->getFamilyName(&name); 106 SkString a; 107 a.appendf("%s, paintGlyphIds[%d] = %d, faceGlyphIds[%d] = %d, face = %s", 108 test.name, i, (int)paintGlyphIds[i], i, (int)faceGlyphIds[i], name.c_str()); 109 REPORTER_ASSERT_MESSAGE(reporter, paintGlyphIds[i] == faceGlyphIds[i], a.c_str()); 110 } 111 } 112 } 113 114 static void test_fontstream(skiatest::Reporter* reporter, 115 SkStream* stream, int ttcIndex) { 116 int n = SkFontStream::GetTableTags(stream, ttcIndex, NULL); 117 SkAutoTArray<SkFontTableTag> array(n); 118 119 int n2 = SkFontStream::GetTableTags(stream, ttcIndex, array.get()); 120 REPORTER_ASSERT(reporter, n == n2); 121 122 for (int i = 0; i < n; ++i) { 123 #ifdef DUMP_TTC_TABLES 124 SkString str; 125 SkFontTableTag t = array[i]; 126 str.appendUnichar((t >> 24) & 0xFF); 127 str.appendUnichar((t >> 16) & 0xFF); 128 str.appendUnichar((t >> 8) & 0xFF); 129 str.appendUnichar((t >> 0) & 0xFF); 130 SkDebugf("[%d:%d] '%s'\n", ttcIndex, i, str.c_str()); 131 #endif 132 size_t size = SkFontStream::GetTableSize(stream, ttcIndex, array[i]); 133 for (size_t j = 0; j < SK_ARRAY_COUNT(gKnownTableSizes); ++j) { 134 if (gKnownTableSizes[j].fTag == array[i]) { 135 REPORTER_ASSERT(reporter, gKnownTableSizes[j].fSize == size); 136 } 137 } 138 } 139 } 140 141 static void test_fontstream(skiatest::Reporter* reporter, SkStream* stream) { 142 int count = SkFontStream::CountTTCEntries(stream); 143 #ifdef DUMP_TTC_TABLES 144 SkDebugf("CountTTCEntries %d\n", count); 145 #endif 146 for (int i = 0; i < count; ++i) { 147 test_fontstream(reporter, stream, i); 148 } 149 } 150 151 static void test_fontstream(skiatest::Reporter* reporter) { 152 // This test cannot run if there is no resource path. 153 SkString resourcePath = GetResourcePath(); 154 if (resourcePath.isEmpty()) { 155 SkDebugf("Could not run fontstream test because resourcePath not specified."); 156 return; 157 } 158 SkString filename = SkOSPath::Join(resourcePath.c_str(), "test.ttc"); 159 160 SkFILEStream stream(filename.c_str()); 161 if (stream.isValid()) { 162 test_fontstream(reporter, &stream); 163 } else { 164 SkDebugf("Could not run fontstream test because test.ttc not found."); 165 } 166 } 167 168 static void test_tables(skiatest::Reporter* reporter, SkTypeface* face) { 169 if (false) { // avoid bit rot, suppress warning 170 SkFontID fontID = face->uniqueID(); 171 REPORTER_ASSERT(reporter, fontID); 172 } 173 174 int count = face->countTables(); 175 176 SkAutoTMalloc<SkFontTableTag> storage(count); 177 SkFontTableTag* tags = storage.get(); 178 179 int count2 = face->getTableTags(tags); 180 REPORTER_ASSERT(reporter, count2 == count); 181 182 for (int i = 0; i < count; ++i) { 183 size_t size = face->getTableSize(tags[i]); 184 REPORTER_ASSERT(reporter, size > 0); 185 186 #ifdef DUMP_TABLES 187 char name[5]; 188 name[0] = (tags[i] >> 24) & 0xFF; 189 name[1] = (tags[i] >> 16) & 0xFF; 190 name[2] = (tags[i] >> 8) & 0xFF; 191 name[3] = (tags[i] >> 0) & 0xFF; 192 name[4] = 0; 193 SkDebugf("%s %d\n", name, size); 194 #endif 195 196 for (size_t j = 0; j < SK_ARRAY_COUNT(gKnownTableSizes); ++j) { 197 if (gKnownTableSizes[j].fTag == tags[i]) { 198 REPORTER_ASSERT(reporter, gKnownTableSizes[j].fSize == size); 199 } 200 } 201 202 // do we get the same size from GetTableData and GetTableSize 203 { 204 SkAutoMalloc data(size); 205 size_t size2 = face->getTableData(tags[i], 0, size, data.get()); 206 REPORTER_ASSERT(reporter, size2 == size); 207 } 208 } 209 } 210 211 static void test_tables(skiatest::Reporter* reporter) { 212 static const char* const gNames[] = { 213 NULL, // default font 214 "Helvetica", "Arial", 215 "Times", "Times New Roman", 216 "Courier", "Courier New", 217 "Terminal", "MS Sans Serif", 218 "Hiragino Mincho ProN", "MS PGothic", 219 }; 220 221 for (size_t i = 0; i < SK_ARRAY_COUNT(gNames); ++i) { 222 SkAutoTUnref<SkTypeface> face(SkTypeface::CreateFromName(gNames[i], SkTypeface::kNormal)); 223 if (face) { 224 #ifdef DUMP_TABLES 225 SkDebugf("%s\n", gNames[i]); 226 #endif 227 test_tables(reporter, face); 228 test_unitsPerEm(reporter, face); 229 test_countGlyphs(reporter, face); 230 test_charsToGlyphs(reporter, face); 231 } 232 } 233 } 234 235 /* 236 * Verifies that the advance values returned by generateAdvance and 237 * generateMetrics match. 238 */ 239 static void test_advances(skiatest::Reporter* reporter) { 240 static const char* const faces[] = { 241 NULL, // default font 242 "Arial", "Times", "Times New Roman", "Helvetica", "Courier", 243 "Courier New", "Verdana", "monospace", 244 }; 245 246 static const struct { 247 SkPaint::Hinting hinting; 248 unsigned flags; 249 } settings[] = { 250 { SkPaint::kNo_Hinting, 0 }, 251 { SkPaint::kNo_Hinting, SkPaint::kLinearText_Flag }, 252 { SkPaint::kNo_Hinting, SkPaint::kSubpixelText_Flag }, 253 { SkPaint::kSlight_Hinting, 0 }, 254 { SkPaint::kSlight_Hinting, SkPaint::kLinearText_Flag }, 255 { SkPaint::kSlight_Hinting, SkPaint::kSubpixelText_Flag }, 256 { SkPaint::kNormal_Hinting, 0 }, 257 { SkPaint::kNormal_Hinting, SkPaint::kLinearText_Flag }, 258 { SkPaint::kNormal_Hinting, SkPaint::kSubpixelText_Flag }, 259 }; 260 261 static const struct { 262 SkScalar fScaleX; 263 SkScalar fSkewX; 264 } gScaleRec[] = { 265 { SK_Scalar1, 0 }, 266 { SK_Scalar1/2, 0 }, 267 // these two exercise obliquing (skew) 268 { SK_Scalar1, -SK_Scalar1/4 }, 269 { SK_Scalar1/2, -SK_Scalar1/4 }, 270 }; 271 272 SkPaint paint; 273 char txt[] = "long.text.with.lots.of.dots."; 274 275 for (size_t i = 0; i < SK_ARRAY_COUNT(faces); i++) { 276 SkAutoTUnref<SkTypeface> face(SkTypeface::CreateFromName(faces[i], SkTypeface::kNormal)); 277 paint.setTypeface(face); 278 279 for (size_t j = 0; j < SK_ARRAY_COUNT(settings); j++) { 280 paint.setHinting(settings[j].hinting); 281 paint.setLinearText((settings[j].flags & SkPaint::kLinearText_Flag) != 0); 282 paint.setSubpixelText((settings[j].flags & SkPaint::kSubpixelText_Flag) != 0); 283 284 for (size_t k = 0; k < SK_ARRAY_COUNT(gScaleRec); ++k) { 285 paint.setTextScaleX(gScaleRec[k].fScaleX); 286 paint.setTextSkewX(gScaleRec[k].fSkewX); 287 288 SkRect bounds; 289 290 // For no hinting and light hinting this should take the 291 // optimized generateAdvance path. 292 SkScalar width1 = paint.measureText(txt, strlen(txt)); 293 294 // Requesting the bounds forces a generateMetrics call. 295 SkScalar width2 = paint.measureText(txt, strlen(txt), &bounds); 296 297 // SkDebugf("Font: %s, generateAdvance: %f, generateMetrics: %f\n", 298 // faces[i], SkScalarToFloat(width1), SkScalarToFloat(width2)); 299 300 REPORTER_ASSERT(reporter, width1 == width2); 301 } 302 } 303 } 304 } 305 306 DEF_TEST(FontHost, reporter) { 307 test_tables(reporter); 308 test_fontstream(reporter); 309 test_advances(reporter); 310 } 311 312 // need tests for SkStrSearch 313
