1 /*
2 * Copyright 2011 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 "SkBlurMask.h"
9 #include "SkBlurMaskFilter.h"
10 #include "SkLayerDrawLooper.h"
11 #include "SkPaint.h"
12 #include "SkPath.h"
13 #include "SkRandom.h"
14 #include "SkReadBuffer.h"
15 #include "SkTypeface.h"
16 #include "SkUtils.h"
17 #include "SkWriteBuffer.h"
18 #include "SkXfermode.h"
19 #include "Test.h"
20
uni_to_utf8(const SkUnichar src[],void * dst,int count)21 static size_t uni_to_utf8(const SkUnichar src[], void* dst, int count) {
22 char* u8 = (char*)dst;
23 for (int i = 0; i < count; ++i) {
24 int n = SkToInt(SkUTF8_FromUnichar(src[i], u8));
25 u8 += n;
26 }
27 return u8 - (char*)dst;
28 }
29
uni_to_utf16(const SkUnichar src[],void * dst,int count)30 static size_t uni_to_utf16(const SkUnichar src[], void* dst, int count) {
31 uint16_t* u16 = (uint16_t*)dst;
32 for (int i = 0; i < count; ++i) {
33 int n = SkToInt(SkUTF16_FromUnichar(src[i], u16));
34 u16 += n;
35 }
36 return (char*)u16 - (char*)dst;
37 }
38
uni_to_utf32(const SkUnichar src[],void * dst,int count)39 static size_t uni_to_utf32(const SkUnichar src[], void* dst, int count) {
40 SkUnichar* u32 = (SkUnichar*)dst;
41 if (src != u32) {
42 memcpy(u32, src, count * sizeof(SkUnichar));
43 }
44 return count * sizeof(SkUnichar);
45 }
46
paint2encoding(const SkPaint & paint)47 static SkTypeface::Encoding paint2encoding(const SkPaint& paint) {
48 SkPaint::TextEncoding enc = paint.getTextEncoding();
49 SkASSERT(SkPaint::kGlyphID_TextEncoding != enc);
50 return (SkTypeface::Encoding)enc;
51 }
52
find_first_zero(const uint16_t glyphs[],int count)53 static int find_first_zero(const uint16_t glyphs[], int count) {
54 for (int i = 0; i < count; ++i) {
55 if (0 == glyphs[i]) {
56 return i;
57 }
58 }
59 return count;
60 }
61
DEF_TEST(Paint_cmap,reporter)62 DEF_TEST(Paint_cmap, reporter) {
63 // need to implement charsToGlyphs on other backends (e.g. linux, win)
64 // before we can run this tests everywhere
65 return;
66
67 static const int NGLYPHS = 64;
68
69 SkUnichar src[NGLYPHS];
70 SkUnichar dst[NGLYPHS]; // used for utf8, utf16, utf32 storage
71
72 static const struct {
73 size_t (*fSeedTextProc)(const SkUnichar[], void* dst, int count);
74 SkPaint::TextEncoding fEncoding;
75 } gRec[] = {
76 { uni_to_utf8, SkPaint::kUTF8_TextEncoding },
77 { uni_to_utf16, SkPaint::kUTF16_TextEncoding },
78 { uni_to_utf32, SkPaint::kUTF32_TextEncoding },
79 };
80
81 SkRandom rand;
82 SkPaint paint;
83 paint.setTypeface(SkTypeface::RefDefault())->unref();
84 SkTypeface* face = paint.getTypeface();
85
86 for (int i = 0; i < 1000; ++i) {
87 // generate some random text
88 for (int j = 0; j < NGLYPHS; ++j) {
89 src[j] = ' ' + j;
90 }
91 // inject some random chars, to sometimes abort early
92 src[rand.nextU() & 63] = rand.nextU() & 0xFFF;
93
94 for (size_t k = 0; k < SK_ARRAY_COUNT(gRec); ++k) {
95 paint.setTextEncoding(gRec[k].fEncoding);
96
97 size_t len = gRec[k].fSeedTextProc(src, dst, NGLYPHS);
98
99 uint16_t glyphs0[NGLYPHS], glyphs1[NGLYPHS];
100
101 bool contains = paint.containsText(dst, len);
102 int nglyphs = paint.textToGlyphs(dst, len, glyphs0);
103 int first = face->charsToGlyphs(dst, paint2encoding(paint), glyphs1, NGLYPHS);
104 int index = find_first_zero(glyphs1, NGLYPHS);
105
106 REPORTER_ASSERT(reporter, NGLYPHS == nglyphs);
107 REPORTER_ASSERT(reporter, index == first);
108 REPORTER_ASSERT(reporter, 0 == memcmp(glyphs0, glyphs1, NGLYPHS * sizeof(uint16_t)));
109 if (contains) {
110 REPORTER_ASSERT(reporter, NGLYPHS == first);
111 } else {
112 REPORTER_ASSERT(reporter, NGLYPHS > first);
113 }
114 }
115 }
116 }
117
118 // temparary api for bicubic, just be sure we can set/clear it
DEF_TEST(Paint_filterQuality,reporter)119 DEF_TEST(Paint_filterQuality, reporter) {
120 SkPaint p0, p1;
121
122 REPORTER_ASSERT(reporter, kNone_SkFilterQuality == p0.getFilterQuality());
123
124 static const SkFilterQuality gQualitys[] = {
125 kNone_SkFilterQuality,
126 kLow_SkFilterQuality,
127 kMedium_SkFilterQuality,
128 kHigh_SkFilterQuality
129 };
130 for (size_t i = 0; i < SK_ARRAY_COUNT(gQualitys); ++i) {
131 p0.setFilterQuality(gQualitys[i]);
132 REPORTER_ASSERT(reporter, gQualitys[i] == p0.getFilterQuality());
133 p1 = p0;
134 REPORTER_ASSERT(reporter, gQualitys[i] == p1.getFilterQuality());
135
136 p0.reset();
137 REPORTER_ASSERT(reporter, kNone_SkFilterQuality == p0.getFilterQuality());
138 }
139 }
140
DEF_TEST(Paint_copy,reporter)141 DEF_TEST(Paint_copy, reporter) {
142 SkPaint paint;
143 // set a few member variables
144 paint.setStyle(SkPaint::kStrokeAndFill_Style);
145 paint.setTextAlign(SkPaint::kLeft_Align);
146 paint.setStrokeWidth(SkIntToScalar(2));
147 // set a few pointers
148 SkLayerDrawLooper::Builder looperBuilder;
149 SkLayerDrawLooper* looper = looperBuilder.detachLooper();
150 paint.setLooper(looper)->unref();
151 SkMaskFilter* mask = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
152 SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(1)));
153 paint.setMaskFilter(mask)->unref();
154
155 // copy the paint using the copy constructor and check they are the same
156 SkPaint copiedPaint = paint;
157 REPORTER_ASSERT(reporter, paint == copiedPaint);
158
159 // copy the paint using the equal operator and check they are the same
160 copiedPaint = paint;
161 REPORTER_ASSERT(reporter, paint == copiedPaint);
162
163 // clean the paint and check they are back to their initial states
164 SkPaint cleanPaint;
165 paint.reset();
166 copiedPaint.reset();
167 REPORTER_ASSERT(reporter, cleanPaint == paint);
168 REPORTER_ASSERT(reporter, cleanPaint == copiedPaint);
169 }
170
171 // found and fixed for webkit: mishandling when we hit recursion limit on
172 // mostly degenerate cubic flatness test
DEF_TEST(Paint_regression_cubic,reporter)173 DEF_TEST(Paint_regression_cubic, reporter) {
174 SkPath path, stroke;
175 SkPaint paint;
176
177 path.moveTo(460.2881309415525f,
178 303.250847066498f);
179 path.cubicTo(463.36378422175284f,
180 302.1169735073363f,
181 456.32239330810046f,
182 304.720354932878f,
183 453.15255460013304f,
184 305.788586869862f);
185
186 SkRect fillR, strokeR;
187 fillR = path.getBounds();
188
189 paint.setStyle(SkPaint::kStroke_Style);
190 paint.setStrokeWidth(SkIntToScalar(2));
191 paint.getFillPath(path, &stroke);
192 strokeR = stroke.getBounds();
193
194 SkRect maxR = fillR;
195 SkScalar miter = SkMaxScalar(SK_Scalar1, paint.getStrokeMiter());
196 SkScalar inset = paint.getStrokeJoin() == SkPaint::kMiter_Join ?
197 SkScalarMul(paint.getStrokeWidth(), miter) :
198 paint.getStrokeWidth();
199 maxR.inset(-inset, -inset);
200
201 // test that our stroke didn't explode
202 REPORTER_ASSERT(reporter, maxR.contains(strokeR));
203 }
204
DEF_TEST(Paint_flattening,reporter)205 DEF_TEST(Paint_flattening, reporter) {
206 const SkFilterQuality levels[] = {
207 kNone_SkFilterQuality,
208 kLow_SkFilterQuality,
209 kMedium_SkFilterQuality,
210 kHigh_SkFilterQuality,
211 };
212 const SkPaint::Hinting hinting[] = {
213 SkPaint::kNo_Hinting,
214 SkPaint::kSlight_Hinting,
215 SkPaint::kNormal_Hinting,
216 SkPaint::kFull_Hinting,
217 };
218 const SkPaint::Align align[] = {
219 SkPaint::kLeft_Align,
220 SkPaint::kCenter_Align,
221 SkPaint::kRight_Align
222 };
223 const SkPaint::Cap caps[] = {
224 SkPaint::kButt_Cap,
225 SkPaint::kRound_Cap,
226 SkPaint::kSquare_Cap,
227 };
228 const SkPaint::Join joins[] = {
229 SkPaint::kMiter_Join,
230 SkPaint::kRound_Join,
231 SkPaint::kBevel_Join,
232 };
233 const SkPaint::TextEncoding encodings[] = {
234 SkPaint::kUTF8_TextEncoding,
235 SkPaint::kUTF16_TextEncoding,
236 SkPaint::kUTF32_TextEncoding,
237 SkPaint::kGlyphID_TextEncoding,
238 };
239 const SkPaint::Style styles[] = {
240 SkPaint::kFill_Style,
241 SkPaint::kStroke_Style,
242 SkPaint::kStrokeAndFill_Style,
243 };
244
245 #define FOR_SETUP(index, array, setter) \
246 for (size_t index = 0; index < SK_ARRAY_COUNT(array); ++index) { \
247 paint.setter(array[index]); \
248
249 SkPaint paint;
250 paint.setFlags(0x1234);
251
252 FOR_SETUP(i, levels, setFilterQuality)
253 FOR_SETUP(j, hinting, setHinting)
254 FOR_SETUP(k, align, setTextAlign)
255 FOR_SETUP(l, caps, setStrokeCap)
256 FOR_SETUP(m, joins, setStrokeJoin)
257 FOR_SETUP(n, encodings, setTextEncoding)
258 FOR_SETUP(p, styles, setStyle)
259
260 SkWriteBuffer writer;
261 paint.flatten(writer);
262
263 const uint32_t* written = writer.getWriter32()->contiguousArray();
264 SkReadBuffer reader(written, writer.bytesWritten());
265
266 SkPaint paint2;
267 paint2.unflatten(reader);
268 REPORTER_ASSERT(reporter, paint2 == paint);
269
270 }}}}}}}
271 #undef FOR_SETUP
272
273 }
274
275 // found and fixed for android: not initializing rect for string's of length 0
276 DEF_TEST(Paint_regression_measureText, reporter) {
277
278 SkPaint paint;
279 paint.setTextSize(12.0f);
280
281 SkRect r;
282 r.setLTRB(SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN);
283
284 // test that the rect was reset
285 paint.measureText("", 0, &r);
286 REPORTER_ASSERT(reporter, r.isEmpty());
287 }
288
289 #define ASSERT(expr) REPORTER_ASSERT(r, expr)
290
291 DEF_TEST(Paint_MoreFlattening, r) {
292 SkPaint paint;
293 paint.setColor(0x00AABBCC);
294 paint.setTextScaleX(1.0f); // Default value, ignored.
295 paint.setTextSize(19);
296 paint.setXfermode(SkXfermode::Create(SkXfermode::kModulate_Mode))->unref();
297 paint.setLooper(nullptr); // Default value, ignored.
298
299 SkWriteBuffer writer;
300 paint.flatten(writer);
301
302 SkReadBuffer reader(writer.getWriter32()->contiguousArray(), writer.bytesWritten());
303 SkPaint other;
304 other.unflatten(reader);
305 ASSERT(reader.offset() == writer.bytesWritten());
306
307 // No matter the encoding, these must always hold.
308 ASSERT(other.getColor() == paint.getColor());
309 ASSERT(other.getTextScaleX() == paint.getTextScaleX());
310 ASSERT(other.getTextSize() == paint.getTextSize());
311 ASSERT(other.getLooper() == paint.getLooper());
312
313 // We have to be a little looser and compare just the modes. Pointers might not be the same.
314 SkXfermode::Mode otherMode, paintMode;
315 ASSERT(other.getXfermode()->asMode(&otherMode));
316 ASSERT(paint.getXfermode()->asMode(&paintMode));
317 ASSERT(otherMode == paintMode);
318 }
319
320 DEF_TEST(Paint_getHash, r) {
321 // Try not to inspect the actual hash values in here.
322 // We might want to change the hash function.
323
324 SkPaint paint;
325 const uint32_t defaultHash = paint.getHash();
326
327 // Check that some arbitrary field affects the hash.
328 paint.setColor(0xFF00FF00);
329 REPORTER_ASSERT(r, paint.getHash() != defaultHash);
330 paint.setColor(SK_ColorBLACK); // Reset to default value.
331 REPORTER_ASSERT(r, paint.getHash() == defaultHash);
332
333 // SkTypeface is the first field we hash, so test it specially.
334 paint.setTypeface(SkTypeface::RefDefault())->unref();
335 REPORTER_ASSERT(r, paint.getHash() != defaultHash);
336 paint.setTypeface(nullptr);
337 REPORTER_ASSERT(r, paint.getHash() == defaultHash);
338
339 // This is part of fBitfields, the last field we hash.
340 paint.setHinting(SkPaint::kSlight_Hinting);
341 REPORTER_ASSERT(r, paint.getHash() != defaultHash);
342 paint.setHinting(SkPaint::kNormal_Hinting);
343 REPORTER_ASSERT(r, paint.getHash() == defaultHash);
344 }
345
346 #include "SkColorMatrixFilter.h"
347
348 DEF_TEST(Paint_nothingToDraw, r) {
349 SkPaint paint;
350
351 REPORTER_ASSERT(r, !paint.nothingToDraw());
352 paint.setAlpha(0);
353 REPORTER_ASSERT(r, paint.nothingToDraw());
354
355 paint.setAlpha(0xFF);
356 paint.setXfermodeMode(SkXfermode::kDst_Mode);
357 REPORTER_ASSERT(r, paint.nothingToDraw());
358
359 paint.setAlpha(0);
360 paint.setXfermodeMode(SkXfermode::kSrcOver_Mode);
361
362 SkColorMatrix cm;
363 cm.setIdentity(); // does not change alpha
364 paint.setColorFilter(SkColorMatrixFilter::Create(cm))->unref();
365 REPORTER_ASSERT(r, paint.nothingToDraw());
366
367 cm.postTranslate(0, 0, 0, 1); // wacks alpha
368 paint.setColorFilter(SkColorMatrixFilter::Create(cm))->unref();
369 REPORTER_ASSERT(r, !paint.nothingToDraw());
370 }
371
372