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, SkStream* stream, int ttcIndex) { 115 int n = SkFontStream::GetTableTags(stream, ttcIndex, nullptr); 116 SkAutoTArray<SkFontTableTag> array(n); 117 118 int n2 = SkFontStream::GetTableTags(stream, ttcIndex, array.get()); 119 REPORTER_ASSERT(reporter, n == n2); 120 121 for (int i = 0; i < n; ++i) { 122 #ifdef DUMP_TTC_TABLES 123 SkString str; 124 SkFontTableTag t = array[i]; 125 str.appendUnichar((t >> 24) & 0xFF); 126 str.appendUnichar((t >> 16) & 0xFF); 127 str.appendUnichar((t >> 8) & 0xFF); 128 str.appendUnichar((t >> 0) & 0xFF); 129 SkDebugf("[%d:%d] '%s'\n", ttcIndex, i, str.c_str()); 130 #endif 131 size_t size = SkFontStream::GetTableSize(stream, ttcIndex, array[i]); 132 for (size_t j = 0; j < SK_ARRAY_COUNT(gKnownTableSizes); ++j) { 133 if (gKnownTableSizes[j].fTag == array[i]) { 134 REPORTER_ASSERT(reporter, gKnownTableSizes[j].fSize == size); 135 } 136 } 137 } 138 } 139 140 static void test_fontstream(skiatest::Reporter* reporter) { 141 SkAutoTDelete<SkStreamAsset> stream(GetResourceAsStream("/fonts/test.ttc")); 142 if (!stream) { 143 SkDebugf("Skipping FontHostTest::test_fontstream\n"); 144 return; 145 } 146 147 int count = SkFontStream::CountTTCEntries(stream); 148 #ifdef DUMP_TTC_TABLES 149 SkDebugf("CountTTCEntries %d\n", count); 150 #endif 151 for (int i = 0; i < count; ++i) { 152 test_fontstream(reporter, stream, i); 153 } 154 } 155 156 static void test_symbolfont(skiatest::Reporter* reporter) { 157 SkAutoTUnref<SkTypeface> typeface(GetResourceAsTypeface("/fonts/SpiderSymbol.ttf")); 158 if (!typeface) { 159 SkDebugf("Skipping FontHostTest::test_symbolfont\n"); 160 return; 161 } 162 163 SkUnichar c = 0xf021; 164 uint16_t g; 165 SkPaint paint; 166 paint.setTypeface(typeface); 167 paint.setTextEncoding(SkPaint::kUTF32_TextEncoding); 168 paint.textToGlyphs(&c, 4, &g); 169 REPORTER_ASSERT(reporter, g == 3); 170 } 171 172 static void test_tables(skiatest::Reporter* reporter, SkTypeface* face) { 173 if (false) { // avoid bit rot, suppress warning 174 SkFontID fontID = face->uniqueID(); 175 REPORTER_ASSERT(reporter, fontID); 176 } 177 178 int count = face->countTables(); 179 180 SkAutoTMalloc<SkFontTableTag> storage(count); 181 SkFontTableTag* tags = storage.get(); 182 183 int count2 = face->getTableTags(tags); 184 REPORTER_ASSERT(reporter, count2 == count); 185 186 for (int i = 0; i < count; ++i) { 187 size_t size = face->getTableSize(tags[i]); 188 REPORTER_ASSERT(reporter, size > 0); 189 190 #ifdef DUMP_TABLES 191 char name[5]; 192 name[0] = (tags[i] >> 24) & 0xFF; 193 name[1] = (tags[i] >> 16) & 0xFF; 194 name[2] = (tags[i] >> 8) & 0xFF; 195 name[3] = (tags[i] >> 0) & 0xFF; 196 name[4] = 0; 197 SkDebugf("%s %d\n", name, size); 198 #endif 199 200 for (size_t j = 0; j < SK_ARRAY_COUNT(gKnownTableSizes); ++j) { 201 if (gKnownTableSizes[j].fTag == tags[i]) { 202 REPORTER_ASSERT(reporter, gKnownTableSizes[j].fSize == size); 203 } 204 } 205 206 // do we get the same size from GetTableData and GetTableSize 207 { 208 SkAutoMalloc data(size); 209 size_t size2 = face->getTableData(tags[i], 0, size, data.get()); 210 REPORTER_ASSERT(reporter, size2 == size); 211 } 212 } 213 } 214 215 static void test_tables(skiatest::Reporter* reporter) { 216 static const char* const gNames[] = { 217 nullptr, // default font 218 "Helvetica", "Arial", 219 "Times", "Times New Roman", 220 "Courier", "Courier New", 221 "Terminal", "MS Sans Serif", 222 "Hiragino Mincho ProN", "MS PGothic", 223 }; 224 225 for (size_t i = 0; i < SK_ARRAY_COUNT(gNames); ++i) { 226 SkAutoTUnref<SkTypeface> face(SkTypeface::CreateFromName(gNames[i], SkTypeface::kNormal)); 227 if (face) { 228 #ifdef DUMP_TABLES 229 SkDebugf("%s\n", gNames[i]); 230 #endif 231 test_tables(reporter, face); 232 test_unitsPerEm(reporter, face); 233 test_countGlyphs(reporter, face); 234 test_charsToGlyphs(reporter, face); 235 } 236 } 237 } 238 239 /* 240 * Verifies that the advance values returned by generateAdvance and 241 * generateMetrics match. 242 */ 243 static void test_advances(skiatest::Reporter* reporter) { 244 static const char* const faces[] = { 245 nullptr, // default font 246 "Arial", "Times", "Times New Roman", "Helvetica", "Courier", 247 "Courier New", "Verdana", "monospace", 248 }; 249 250 static const struct { 251 SkPaint::Hinting hinting; 252 unsigned flags; 253 } settings[] = { 254 { SkPaint::kNo_Hinting, 0 }, 255 { SkPaint::kNo_Hinting, SkPaint::kLinearText_Flag }, 256 { SkPaint::kNo_Hinting, SkPaint::kSubpixelText_Flag }, 257 { SkPaint::kSlight_Hinting, 0 }, 258 { SkPaint::kSlight_Hinting, SkPaint::kLinearText_Flag }, 259 { SkPaint::kSlight_Hinting, SkPaint::kSubpixelText_Flag }, 260 { SkPaint::kNormal_Hinting, 0 }, 261 { SkPaint::kNormal_Hinting, SkPaint::kLinearText_Flag }, 262 { SkPaint::kNormal_Hinting, SkPaint::kSubpixelText_Flag }, 263 }; 264 265 static const struct { 266 SkScalar fScaleX; 267 SkScalar fSkewX; 268 } gScaleRec[] = { 269 { SK_Scalar1, 0 }, 270 { SK_Scalar1/2, 0 }, 271 // these two exercise obliquing (skew) 272 { SK_Scalar1, -SK_Scalar1/4 }, 273 { SK_Scalar1/2, -SK_Scalar1/4 }, 274 }; 275 276 SkPaint paint; 277 char txt[] = "long.text.with.lots.of.dots."; 278 279 for (size_t i = 0; i < SK_ARRAY_COUNT(faces); i++) { 280 SkAutoTUnref<SkTypeface> face(SkTypeface::CreateFromName(faces[i], SkTypeface::kNormal)); 281 paint.setTypeface(face); 282 283 for (size_t j = 0; j < SK_ARRAY_COUNT(settings); j++) { 284 paint.setHinting(settings[j].hinting); 285 paint.setLinearText((settings[j].flags & SkPaint::kLinearText_Flag) != 0); 286 paint.setSubpixelText((settings[j].flags & SkPaint::kSubpixelText_Flag) != 0); 287 288 for (size_t k = 0; k < SK_ARRAY_COUNT(gScaleRec); ++k) { 289 paint.setTextScaleX(gScaleRec[k].fScaleX); 290 paint.setTextSkewX(gScaleRec[k].fSkewX); 291 292 SkRect bounds; 293 294 // For no hinting and light hinting this should take the 295 // optimized generateAdvance path. 296 SkScalar width1 = paint.measureText(txt, strlen(txt)); 297 298 // Requesting the bounds forces a generateMetrics call. 299 SkScalar width2 = paint.measureText(txt, strlen(txt), &bounds); 300 301 // SkDebugf("Font: %s, generateAdvance: %f, generateMetrics: %f\n", 302 // faces[i], SkScalarToFloat(width1), SkScalarToFloat(width2)); 303 304 REPORTER_ASSERT(reporter, width1 == width2); 305 } 306 } 307 } 308 } 309 310 DEF_TEST(FontHost, reporter) { 311 test_tables(reporter); 312 test_fontstream(reporter); 313 test_advances(reporter); 314 test_symbolfont(reporter); 315 } 316 317 // need tests for SkStrSearch 318