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
8 #include "SkPaint.h"
9 #include "SkPoint.h"
10 #include "SkTextBlobRunIterator.h"
11 #include "SkTypeface.h"
12
13 #include "Test.h"
14
15 class TextBlobTester {
16 public:
17 // This unit test feeds an SkTextBlobBuilder various runs then checks to see if
18 // the result contains the provided data and merges runs when appropriate.
TestBuilder(skiatest::Reporter * reporter)19 static void TestBuilder(skiatest::Reporter* reporter) {
20 SkTextBlobBuilder builder;
21
22 // empty run set
23 RunBuilderTest(reporter, builder, nullptr, 0, nullptr, 0);
24
25 RunDef set1[] = {
26 { 128, SkTextBlob::kDefault_Positioning, 100, 100 },
27 };
28 RunBuilderTest(reporter, builder, set1, SK_ARRAY_COUNT(set1), set1, SK_ARRAY_COUNT(set1));
29
30 RunDef set2[] = {
31 { 128, SkTextBlob::kHorizontal_Positioning, 100, 100 },
32 };
33 RunBuilderTest(reporter, builder, set2, SK_ARRAY_COUNT(set2), set2, SK_ARRAY_COUNT(set2));
34
35 RunDef set3[] = {
36 { 128, SkTextBlob::kFull_Positioning, 100, 100 },
37 };
38 RunBuilderTest(reporter, builder, set3, SK_ARRAY_COUNT(set3), set3, SK_ARRAY_COUNT(set3));
39
40 RunDef set4[] = {
41 { 128, SkTextBlob::kDefault_Positioning, 100, 150 },
42 { 128, SkTextBlob::kDefault_Positioning, 100, 150 },
43 { 128, SkTextBlob::kDefault_Positioning, 100, 150 },
44 };
45 RunBuilderTest(reporter, builder, set4, SK_ARRAY_COUNT(set4), set4, SK_ARRAY_COUNT(set4));
46
47 RunDef set5[] = {
48 { 128, SkTextBlob::kHorizontal_Positioning, 100, 150 },
49 { 128, SkTextBlob::kHorizontal_Positioning, 200, 150 },
50 { 128, SkTextBlob::kHorizontal_Positioning, 300, 250 },
51 };
52 RunDef mergedSet5[] = {
53 { 256, SkTextBlob::kHorizontal_Positioning, 0, 150 },
54 { 128, SkTextBlob::kHorizontal_Positioning, 0, 250 },
55 };
56 RunBuilderTest(reporter, builder, set5, SK_ARRAY_COUNT(set5), mergedSet5,
57 SK_ARRAY_COUNT(mergedSet5));
58
59 RunDef set6[] = {
60 { 128, SkTextBlob::kFull_Positioning, 100, 100 },
61 { 128, SkTextBlob::kFull_Positioning, 200, 200 },
62 { 128, SkTextBlob::kFull_Positioning, 300, 300 },
63 };
64 RunDef mergedSet6[] = {
65 { 384, SkTextBlob::kFull_Positioning, 0, 0 },
66 };
67 RunBuilderTest(reporter, builder, set6, SK_ARRAY_COUNT(set6), mergedSet6,
68 SK_ARRAY_COUNT(mergedSet6));
69
70 RunDef set7[] = {
71 { 128, SkTextBlob::kDefault_Positioning, 100, 150 },
72 { 128, SkTextBlob::kDefault_Positioning, 100, 150 },
73 { 128, SkTextBlob::kHorizontal_Positioning, 100, 150 },
74 { 128, SkTextBlob::kHorizontal_Positioning, 200, 150 },
75 { 128, SkTextBlob::kFull_Positioning, 400, 350 },
76 { 128, SkTextBlob::kFull_Positioning, 400, 350 },
77 { 128, SkTextBlob::kDefault_Positioning, 100, 450 },
78 { 128, SkTextBlob::kDefault_Positioning, 100, 450 },
79 { 128, SkTextBlob::kHorizontal_Positioning, 100, 550 },
80 { 128, SkTextBlob::kHorizontal_Positioning, 200, 650 },
81 { 128, SkTextBlob::kFull_Positioning, 400, 750 },
82 { 128, SkTextBlob::kFull_Positioning, 400, 850 },
83 };
84 RunDef mergedSet7[] = {
85 { 128, SkTextBlob::kDefault_Positioning, 100, 150 },
86 { 128, SkTextBlob::kDefault_Positioning, 100, 150 },
87 { 256, SkTextBlob::kHorizontal_Positioning, 0, 150 },
88 { 256, SkTextBlob::kFull_Positioning, 0, 0 },
89 { 128, SkTextBlob::kDefault_Positioning, 100, 450 },
90 { 128, SkTextBlob::kDefault_Positioning, 100, 450 },
91 { 128, SkTextBlob::kHorizontal_Positioning, 0, 550 },
92 { 128, SkTextBlob::kHorizontal_Positioning, 0, 650 },
93 { 256, SkTextBlob::kFull_Positioning, 0, 0 },
94 };
95 RunBuilderTest(reporter, builder, set7, SK_ARRAY_COUNT(set7), mergedSet7,
96 SK_ARRAY_COUNT(mergedSet7));
97 }
98
99 // This unit test verifies blob bounds computation.
TestBounds(skiatest::Reporter * reporter)100 static void TestBounds(skiatest::Reporter* reporter) {
101 SkTextBlobBuilder builder;
102 SkPaint font;
103 font.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
104
105 // Explicit bounds.
106 {
107 SkAutoTUnref<const SkTextBlob> blob(builder.build());
108 REPORTER_ASSERT(reporter, blob->bounds().isEmpty());
109 }
110
111 {
112 SkRect r1 = SkRect::MakeXYWH(10, 10, 20, 20);
113 builder.allocRun(font, 16, 0, 0, &r1);
114 SkAutoTUnref<const SkTextBlob> blob(builder.build());
115 REPORTER_ASSERT(reporter, blob->bounds() == r1);
116 }
117
118 {
119 SkRect r1 = SkRect::MakeXYWH(10, 10, 20, 20);
120 builder.allocRunPosH(font, 16, 0, &r1);
121 SkAutoTUnref<const SkTextBlob> blob(builder.build());
122 REPORTER_ASSERT(reporter, blob->bounds() == r1);
123 }
124
125 {
126 SkRect r1 = SkRect::MakeXYWH(10, 10, 20, 20);
127 builder.allocRunPos(font, 16, &r1);
128 SkAutoTUnref<const SkTextBlob> blob(builder.build());
129 REPORTER_ASSERT(reporter, blob->bounds() == r1);
130 }
131
132 {
133 SkRect r1 = SkRect::MakeXYWH(10, 10, 20, 20);
134 SkRect r2 = SkRect::MakeXYWH(15, 20, 50, 50);
135 SkRect r3 = SkRect::MakeXYWH(0, 5, 10, 5);
136
137 builder.allocRun(font, 16, 0, 0, &r1);
138 builder.allocRunPosH(font, 16, 0, &r2);
139 builder.allocRunPos(font, 16, &r3);
140
141 SkAutoTUnref<const SkTextBlob> blob(builder.build());
142 REPORTER_ASSERT(reporter, blob->bounds() == SkRect::MakeXYWH(0, 5, 65, 65));
143 }
144
145 {
146 // Verify empty blob bounds after building some non-empty blobs.
147 SkAutoTUnref<const SkTextBlob> blob(builder.build());
148 REPORTER_ASSERT(reporter, blob->bounds().isEmpty());
149 }
150
151 // Implicit bounds
152
153 {
154 // Exercise the empty bounds path, and ensure that RunRecord-aligned pos buffers
155 // don't trigger asserts (http://crbug.com/542643).
156 SkPaint p;
157 p.setTextSize(0);
158 p.setTextEncoding(SkPaint::kUTF8_TextEncoding);
159
160 const char* txt = "BOOO";
161 const size_t txtLen = strlen(txt);
162 const int glyphCount = p.textToGlyphs(txt, txtLen, nullptr);
163
164 p.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
165 const SkTextBlobBuilder::RunBuffer& buffer = builder.allocRunPos(p, glyphCount);
166
167 p.setTextEncoding(SkPaint::kUTF8_TextEncoding);
168 p.textToGlyphs(txt, txtLen, buffer.glyphs);
169
170 memset(buffer.pos, 0, sizeof(SkScalar) * glyphCount * 2);
171 SkAutoTUnref<const SkTextBlob> blob(builder.build());
172 REPORTER_ASSERT(reporter, blob->bounds().isEmpty());
173 }
174 }
175
176 // Verify that text-related properties are captured in run paints.
TestPaintProps(skiatest::Reporter * reporter)177 static void TestPaintProps(skiatest::Reporter* reporter) {
178 SkPaint font;
179 font.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
180
181 SkAutoTUnref<SkTypeface> typeface(SkTypeface::RefDefault());
182
183 // Kitchen sink font.
184 font.setTextSize(42);
185 font.setTextScaleX(4.2f);
186 font.setTypeface(typeface);
187 font.setTextSkewX(0.42f);
188 font.setTextAlign(SkPaint::kCenter_Align);
189 font.setHinting(SkPaint::kFull_Hinting);
190 font.setAntiAlias(true);
191 font.setUnderlineText(true);
192 font.setStrikeThruText(true);
193 font.setFakeBoldText(true);
194 font.setLinearText(true);
195 font.setSubpixelText(true);
196 font.setDevKernText(true);
197 font.setLCDRenderText(true);
198 font.setEmbeddedBitmapText(true);
199 font.setAutohinted(true);
200 font.setVerticalText(true);
201 font.setFlags(font.getFlags() | SkPaint::kGenA8FromLCD_Flag);
202
203 // Ensure we didn't pick default values by mistake.
204 SkPaint defaultPaint;
205 REPORTER_ASSERT(reporter, defaultPaint.getTextSize() != font.getTextSize());
206 REPORTER_ASSERT(reporter, defaultPaint.getTextScaleX() != font.getTextScaleX());
207 REPORTER_ASSERT(reporter, defaultPaint.getTypeface() != font.getTypeface());
208 REPORTER_ASSERT(reporter, defaultPaint.getTextSkewX() != font.getTextSkewX());
209 REPORTER_ASSERT(reporter, defaultPaint.getTextAlign() != font.getTextAlign());
210 REPORTER_ASSERT(reporter, defaultPaint.getHinting() != font.getHinting());
211 REPORTER_ASSERT(reporter, defaultPaint.isAntiAlias() != font.isAntiAlias());
212 REPORTER_ASSERT(reporter, defaultPaint.isUnderlineText() != font.isUnderlineText());
213 REPORTER_ASSERT(reporter, defaultPaint.isStrikeThruText() != font.isStrikeThruText());
214 REPORTER_ASSERT(reporter, defaultPaint.isFakeBoldText() != font.isFakeBoldText());
215 REPORTER_ASSERT(reporter, defaultPaint.isLinearText() != font.isLinearText());
216 REPORTER_ASSERT(reporter, defaultPaint.isSubpixelText() != font.isSubpixelText());
217 REPORTER_ASSERT(reporter, defaultPaint.isDevKernText() != font.isDevKernText());
218 REPORTER_ASSERT(reporter, defaultPaint.isLCDRenderText() != font.isLCDRenderText());
219 REPORTER_ASSERT(reporter, defaultPaint.isEmbeddedBitmapText() != font.isEmbeddedBitmapText());
220 REPORTER_ASSERT(reporter, defaultPaint.isAutohinted() != font.isAutohinted());
221 REPORTER_ASSERT(reporter, defaultPaint.isVerticalText() != font.isVerticalText());
222 REPORTER_ASSERT(reporter, (defaultPaint.getFlags() & SkPaint::kGenA8FromLCD_Flag) !=
223 (font.getFlags() & SkPaint::kGenA8FromLCD_Flag));
224
225 SkTextBlobBuilder builder;
226 AddRun(font, 1, SkTextBlob::kDefault_Positioning, SkPoint::Make(0, 0), builder);
227 AddRun(font, 1, SkTextBlob::kHorizontal_Positioning, SkPoint::Make(0, 0), builder);
228 AddRun(font, 1, SkTextBlob::kFull_Positioning, SkPoint::Make(0, 0), builder);
229 SkAutoTUnref<const SkTextBlob> blob(builder.build());
230
231 SkTextBlobRunIterator it(blob);
232 while (!it.done()) {
233 SkPaint paint;
234 it.applyFontToPaint(&paint);
235
236 REPORTER_ASSERT(reporter, paint.getTextSize() == font.getTextSize());
237 REPORTER_ASSERT(reporter, paint.getTextScaleX() == font.getTextScaleX());
238 REPORTER_ASSERT(reporter, paint.getTypeface() == font.getTypeface());
239 REPORTER_ASSERT(reporter, paint.getTextSkewX() == font.getTextSkewX());
240 REPORTER_ASSERT(reporter, paint.getTextAlign() == font.getTextAlign());
241 REPORTER_ASSERT(reporter, paint.getHinting() == font.getHinting());
242 REPORTER_ASSERT(reporter, paint.isAntiAlias() == font.isAntiAlias());
243 REPORTER_ASSERT(reporter, paint.isUnderlineText() == font.isUnderlineText());
244 REPORTER_ASSERT(reporter, paint.isStrikeThruText() == font.isStrikeThruText());
245 REPORTER_ASSERT(reporter, paint.isFakeBoldText() == font.isFakeBoldText());
246 REPORTER_ASSERT(reporter, paint.isLinearText() == font.isLinearText());
247 REPORTER_ASSERT(reporter, paint.isSubpixelText() == font.isSubpixelText());
248 REPORTER_ASSERT(reporter, paint.isDevKernText() == font.isDevKernText());
249 REPORTER_ASSERT(reporter, paint.isLCDRenderText() == font.isLCDRenderText());
250 REPORTER_ASSERT(reporter, paint.isEmbeddedBitmapText() == font.isEmbeddedBitmapText());
251 REPORTER_ASSERT(reporter, paint.isAutohinted() == font.isAutohinted());
252 REPORTER_ASSERT(reporter, paint.isVerticalText() == font.isVerticalText());
253 REPORTER_ASSERT(reporter, (paint.getFlags() & SkPaint::kGenA8FromLCD_Flag) ==
254 (font.getFlags() & SkPaint::kGenA8FromLCD_Flag));
255
256 it.next();
257 }
258
259 }
260
261 private:
262 struct RunDef {
263 unsigned count;
264 SkTextBlob::GlyphPositioning pos;
265 SkScalar x, y;
266 };
267
RunBuilderTest(skiatest::Reporter * reporter,SkTextBlobBuilder & builder,const RunDef in[],unsigned inCount,const RunDef out[],unsigned outCount)268 static void RunBuilderTest(skiatest::Reporter* reporter, SkTextBlobBuilder& builder,
269 const RunDef in[], unsigned inCount,
270 const RunDef out[], unsigned outCount) {
271 SkPaint font;
272 font.setTextEncoding(SkPaint::kGlyphID_TextEncoding);
273
274 unsigned glyphCount = 0;
275 unsigned posCount = 0;
276
277 for (unsigned i = 0; i < inCount; ++i) {
278 AddRun(font, in[i].count, in[i].pos, SkPoint::Make(in[i].x, in[i].y), builder);
279 glyphCount += in[i].count;
280 posCount += in[i].count * in[i].pos;
281 }
282
283 SkAutoTUnref<const SkTextBlob> blob(builder.build());
284
285 SkTextBlobRunIterator it(blob);
286 for (unsigned i = 0; i < outCount; ++i) {
287 REPORTER_ASSERT(reporter, !it.done());
288 REPORTER_ASSERT(reporter, out[i].pos == it.positioning());
289 REPORTER_ASSERT(reporter, out[i].count == it.glyphCount());
290 if (SkTextBlob::kDefault_Positioning == out[i].pos) {
291 REPORTER_ASSERT(reporter, out[i].x == it.offset().x());
292 REPORTER_ASSERT(reporter, out[i].y == it.offset().y());
293 } else if (SkTextBlob::kHorizontal_Positioning == out[i].pos) {
294 REPORTER_ASSERT(reporter, out[i].y == it.offset().y());
295 }
296
297 for (unsigned k = 0; k < it.glyphCount(); ++k) {
298 REPORTER_ASSERT(reporter, k % 128 == it.glyphs()[k]);
299 if (SkTextBlob::kHorizontal_Positioning == it.positioning()) {
300 REPORTER_ASSERT(reporter, SkIntToScalar(k % 128) == it.pos()[k]);
301 } else if (SkTextBlob::kFull_Positioning == it.positioning()) {
302 REPORTER_ASSERT(reporter, SkIntToScalar(k % 128) == it.pos()[k * 2]);
303 REPORTER_ASSERT(reporter, -SkIntToScalar(k % 128) == it.pos()[k * 2 + 1]);
304 }
305 }
306
307 it.next();
308 }
309
310 REPORTER_ASSERT(reporter, it.done());
311 }
312
AddRun(const SkPaint & font,int count,SkTextBlob::GlyphPositioning pos,const SkPoint & offset,SkTextBlobBuilder & builder,const SkRect * bounds=nullptr)313 static void AddRun(const SkPaint& font, int count, SkTextBlob::GlyphPositioning pos,
314 const SkPoint& offset, SkTextBlobBuilder& builder,
315 const SkRect* bounds = nullptr) {
316 switch (pos) {
317 case SkTextBlob::kDefault_Positioning: {
318 const SkTextBlobBuilder::RunBuffer& rb = builder.allocRun(font, count, offset.x(),
319 offset.y(), bounds);
320 for (int i = 0; i < count; ++i) {
321 rb.glyphs[i] = i;
322 }
323 } break;
324 case SkTextBlob::kHorizontal_Positioning: {
325 const SkTextBlobBuilder::RunBuffer& rb = builder.allocRunPosH(font, count, offset.y(),
326 bounds);
327 for (int i = 0; i < count; ++i) {
328 rb.glyphs[i] = i;
329 rb.pos[i] = SkIntToScalar(i);
330 }
331 } break;
332 case SkTextBlob::kFull_Positioning: {
333 const SkTextBlobBuilder::RunBuffer& rb = builder.allocRunPos(font, count, bounds);
334 for (int i = 0; i < count; ++i) {
335 rb.glyphs[i] = i;
336 rb.pos[i * 2] = SkIntToScalar(i);
337 rb.pos[i * 2 + 1] = -SkIntToScalar(i);
338 }
339 } break;
340 default:
341 SkFAIL("unhandled positioning value");
342 }
343 }
344 };
345
DEF_TEST(TextBlob_builder,reporter)346 DEF_TEST(TextBlob_builder, reporter) {
347 TextBlobTester::TestBuilder(reporter);
348 TextBlobTester::TestBounds(reporter);
349 }
350
DEF_TEST(TextBlob_paint,reporter)351 DEF_TEST(TextBlob_paint, reporter) {
352 TextBlobTester::TestPaintProps(reporter);
353 }
354