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 "SkAutoMalloc.h"
10 #include "SkEndian.h"
11 #include "SkFontStream.h"
12 #include "SkOSFile.h"
13 #include "SkPaint.h"
14 #include "SkStream.h"
15 #include "SkTypeface.h"
16 #include "Test.h"
17
18 //#define DUMP_TABLES
19 //#define DUMP_TTC_TABLES
20
21 #define kFontTableTag_head SkSetFourByteTag('h', 'e', 'a', 'd')
22 #define kFontTableTag_hhea SkSetFourByteTag('h', 'h', 'e', 'a')
23 #define kFontTableTag_maxp SkSetFourByteTag('m', 'a', 'x', 'p')
24
25 static const struct TagSize {
26 SkFontTableTag fTag;
27 size_t fSize;
28 } gKnownTableSizes[] = {
29 { kFontTableTag_head, 54 },
30 { kFontTableTag_hhea, 36 },
31 };
32
33 // Test that getUnitsPerEm() agrees with a direct lookup in the 'head' table
34 // (if that table is available).
test_unitsPerEm(skiatest::Reporter * reporter,const sk_sp<SkTypeface> & face)35 static void test_unitsPerEm(skiatest::Reporter* reporter, const sk_sp<SkTypeface>& face) {
36 int nativeUPEM = face->getUnitsPerEm();
37
38 int tableUPEM = -1;
39 size_t size = face->getTableSize(kFontTableTag_head);
40 if (size) {
41 // unitsPerEm is at offset 18 into the 'head' table.
42 uint16_t rawUPEM;
43 face->getTableData(kFontTableTag_head, 18, sizeof(rawUPEM), &rawUPEM);
44 tableUPEM = SkEndian_SwapBE16(rawUPEM);
45 }
46
47 if (tableUPEM >= 0) {
48 REPORTER_ASSERT(reporter, tableUPEM == nativeUPEM);
49 }
50 }
51
52 // Test that countGlyphs() agrees with a direct lookup in the 'maxp' table
53 // (if that table is available).
test_countGlyphs(skiatest::Reporter * reporter,const sk_sp<SkTypeface> & face)54 static void test_countGlyphs(skiatest::Reporter* reporter, const sk_sp<SkTypeface>& face) {
55 int nativeGlyphs = face->countGlyphs();
56
57 int tableGlyphs = -1;
58 size_t size = face->getTableSize(kFontTableTag_maxp);
59 if (size) {
60 // glyphs is at offset 4 into the 'maxp' table.
61 uint16_t rawGlyphs;
62 face->getTableData(kFontTableTag_maxp, 4, sizeof(rawGlyphs), &rawGlyphs);
63 tableGlyphs = SkEndian_SwapBE16(rawGlyphs);
64 }
65
66 if (tableGlyphs >= 0) {
67 REPORTER_ASSERT(reporter, tableGlyphs == nativeGlyphs);
68 }
69 }
70
71 // The following three are all the same code points in various encodings.
72 // a中Яיו��a��
73 static uint8_t utf8Chars[] = { 0x61, 0xE4,0xB8,0xAD, 0xD0,0xAF, 0xD7,0x99, 0xD7,0x95, 0xF0,0x9D,0x84,0x9E, 0x61, 0xF0,0xA0,0xAE,0x9F };
74 static uint16_t utf16Chars[] = { 0x0061, 0x4E2D, 0x042F, 0x05D9, 0x05D5, 0xD834,0xDD1E, 0x0061, 0xD842,0xDF9F };
75 static uint32_t utf32Chars[] = { 0x00000061, 0x00004E2D, 0x0000042F, 0x000005D9, 0x000005D5, 0x0001D11E, 0x00000061, 0x00020B9F };
76
77 struct CharsToGlyphs_TestData {
78 const void* chars;
79 int charCount;
80 size_t charsByteLength;
81 SkTypeface::Encoding typefaceEncoding;
82 const char* name;
83 } static charsToGlyphs_TestData[] = {
84 { utf8Chars, 8, sizeof(utf8Chars), SkTypeface::kUTF8_Encoding, "Simple UTF-8" },
85 { utf16Chars, 8, sizeof(utf16Chars), SkTypeface::kUTF16_Encoding, "Simple UTF-16" },
86 { utf32Chars, 8, sizeof(utf32Chars), SkTypeface::kUTF32_Encoding, "Simple UTF-32" },
87 };
88
89 // Test that SkPaint::textToGlyphs agrees with SkTypeface::charsToGlyphs.
test_charsToGlyphs(skiatest::Reporter * reporter,const sk_sp<SkTypeface> & face)90 static void test_charsToGlyphs(skiatest::Reporter* reporter, const sk_sp<SkTypeface>& face) {
91 uint16_t paintGlyphIds[256];
92 uint16_t faceGlyphIds[256];
93
94 for (size_t testIndex = 0; testIndex < SK_ARRAY_COUNT(charsToGlyphs_TestData); ++testIndex) {
95 CharsToGlyphs_TestData& test = charsToGlyphs_TestData[testIndex];
96
97 SkPaint paint;
98 paint.setTypeface(face);
99 paint.setTextEncoding((SkPaint::TextEncoding)test.typefaceEncoding);
100 paint.textToGlyphs(test.chars, test.charsByteLength, paintGlyphIds);
101
102 face->charsToGlyphs(test.chars, test.typefaceEncoding, faceGlyphIds, test.charCount);
103
104 for (int i = 0; i < test.charCount; ++i) {
105 SkString name;
106 face->getFamilyName(&name);
107 SkString a;
108 a.appendf("%s, paintGlyphIds[%d] = %d, faceGlyphIds[%d] = %d, face = %s",
109 test.name, i, (int)paintGlyphIds[i], i, (int)faceGlyphIds[i], name.c_str());
110 REPORTER_ASSERT_MESSAGE(reporter, paintGlyphIds[i] == faceGlyphIds[i], a.c_str());
111 }
112 }
113 }
114
test_fontstream(skiatest::Reporter * reporter,SkStream * stream,int ttcIndex)115 static void test_fontstream(skiatest::Reporter* reporter, SkStream* stream, int ttcIndex) {
116 int n = SkFontStream::GetTableTags(stream, ttcIndex, nullptr);
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
test_fontstream(skiatest::Reporter * reporter)141 static void test_fontstream(skiatest::Reporter* reporter) {
142 std::unique_ptr<SkStreamAsset> stream(GetResourceAsStream("/fonts/test.ttc"));
143 if (!stream) {
144 SkDebugf("Skipping FontHostTest::test_fontstream\n");
145 return;
146 }
147
148 int count = SkFontStream::CountTTCEntries(stream.get());
149 #ifdef DUMP_TTC_TABLES
150 SkDebugf("CountTTCEntries %d\n", count);
151 #endif
152 for (int i = 0; i < count; ++i) {
153 test_fontstream(reporter, stream.get(), i);
154 }
155 }
156
test_symbolfont(skiatest::Reporter * reporter)157 static void test_symbolfont(skiatest::Reporter* reporter) {
158 SkUnichar c = 0xf021;
159 uint16_t g;
160 SkPaint paint;
161 paint.setTypeface(MakeResourceAsTypeface("/fonts/SpiderSymbol.ttf"));
162 paint.setTextEncoding(SkPaint::kUTF32_TextEncoding);
163 paint.textToGlyphs(&c, 4, &g);
164
165 if (!paint.getTypeface()) {
166 SkDebugf("Skipping FontHostTest::test_symbolfont\n");
167 return;
168 }
169
170 REPORTER_ASSERT(reporter, g == 3);
171 }
172
test_tables(skiatest::Reporter * reporter,const sk_sp<SkTypeface> & face)173 static void test_tables(skiatest::Reporter* reporter, const sk_sp<SkTypeface>& face) {
174 if (false) { // avoid bit rot, suppress warning
175 SkFontID fontID = face->uniqueID();
176 REPORTER_ASSERT(reporter, fontID);
177 }
178
179 int count = face->countTables();
180
181 SkAutoTMalloc<SkFontTableTag> storage(count);
182 SkFontTableTag* tags = storage.get();
183
184 int count2 = face->getTableTags(tags);
185 REPORTER_ASSERT(reporter, count2 == count);
186
187 for (int i = 0; i < count; ++i) {
188 size_t size = face->getTableSize(tags[i]);
189 REPORTER_ASSERT(reporter, size > 0);
190
191 #ifdef DUMP_TABLES
192 char name[5];
193 name[0] = (tags[i] >> 24) & 0xFF;
194 name[1] = (tags[i] >> 16) & 0xFF;
195 name[2] = (tags[i] >> 8) & 0xFF;
196 name[3] = (tags[i] >> 0) & 0xFF;
197 name[4] = 0;
198 SkDebugf("%s %d\n", name, size);
199 #endif
200
201 for (size_t j = 0; j < SK_ARRAY_COUNT(gKnownTableSizes); ++j) {
202 if (gKnownTableSizes[j].fTag == tags[i]) {
203 REPORTER_ASSERT(reporter, gKnownTableSizes[j].fSize == size);
204 }
205 }
206
207 // do we get the same size from GetTableData and GetTableSize
208 {
209 SkAutoMalloc data(size);
210 size_t size2 = face->getTableData(tags[i], 0, size, data.get());
211 REPORTER_ASSERT(reporter, size2 == size);
212 }
213 }
214 }
215
test_tables(skiatest::Reporter * reporter)216 static void test_tables(skiatest::Reporter* reporter) {
217 static const char* const gNames[] = {
218 nullptr, // default font
219 "Helvetica", "Arial",
220 "Times", "Times New Roman",
221 "Courier", "Courier New",
222 "Terminal", "MS Sans Serif",
223 "Hiragino Mincho ProN", "MS PGothic",
224 };
225
226 for (size_t i = 0; i < SK_ARRAY_COUNT(gNames); ++i) {
227 sk_sp<SkTypeface> face(SkTypeface::MakeFromName(gNames[i], SkFontStyle()));
228 if (face) {
229 #ifdef DUMP_TABLES
230 SkDebugf("%s\n", gNames[i]);
231 #endif
232 test_tables(reporter, face);
233 test_unitsPerEm(reporter, face);
234 test_countGlyphs(reporter, face);
235 test_charsToGlyphs(reporter, face);
236 }
237 }
238 }
239
240 /*
241 * Verifies that the advance values returned by generateAdvance and
242 * generateMetrics match.
243 */
test_advances(skiatest::Reporter * reporter)244 static void test_advances(skiatest::Reporter* reporter) {
245 static const char* const faces[] = {
246 nullptr, // default font
247 "Arial", "Times", "Times New Roman", "Helvetica", "Courier",
248 "Courier New", "Verdana", "monospace",
249 };
250
251 static const struct {
252 SkPaint::Hinting hinting;
253 unsigned flags;
254 } settings[] = {
255 { SkPaint::kNo_Hinting, 0 },
256 { SkPaint::kNo_Hinting, SkPaint::kLinearText_Flag },
257 { SkPaint::kNo_Hinting, SkPaint::kSubpixelText_Flag },
258 { SkPaint::kSlight_Hinting, 0 },
259 { SkPaint::kSlight_Hinting, SkPaint::kLinearText_Flag },
260 { SkPaint::kSlight_Hinting, SkPaint::kSubpixelText_Flag },
261 { SkPaint::kNormal_Hinting, 0 },
262 { SkPaint::kNormal_Hinting, SkPaint::kLinearText_Flag },
263 { SkPaint::kNormal_Hinting, SkPaint::kSubpixelText_Flag },
264 };
265
266 static const struct {
267 SkScalar fScaleX;
268 SkScalar fSkewX;
269 } gScaleRec[] = {
270 { SK_Scalar1, 0 },
271 { SK_Scalar1/2, 0 },
272 // these two exercise obliquing (skew)
273 { SK_Scalar1, -SK_Scalar1/4 },
274 { SK_Scalar1/2, -SK_Scalar1/4 },
275 };
276
277 SkPaint paint;
278 char txt[] = "long.text.with.lots.of.dots.";
279
280 for (size_t i = 0; i < SK_ARRAY_COUNT(faces); i++) {
281 paint.setTypeface(SkTypeface::MakeFromName(faces[i], SkFontStyle()));
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
DEF_TEST(FontHost,reporter)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