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 "SkAutoMalloc.h"
9 #include "SkBlurMask.h"
10 #include "SkFont.h"
11 #include "SkLayerDrawLooper.h"
12 #include "SkMaskFilter.h"
13 #include "SkPaintPriv.h"
14 #include "SkPath.h"
15 #include "SkRandom.h"
16 #include "SkReadBuffer.h"
17 #include "SkTo.h"
18 #include "SkTypeface.h"
19 #include "SkUTF.h"
20 #include "SkWriteBuffer.h"
21 #include "Test.h"
22 #undef ASSERT
23
uni_to_utf8(const SkUnichar src[],void * dst,int count)24 static size_t uni_to_utf8(const SkUnichar src[], void* dst, int count) {
25 char* u8 = (char*)dst;
26 for (int i = 0; i < count; ++i) {
27 int n = SkToInt(SkUTF::ToUTF8(src[i], u8));
28 u8 += n;
29 }
30 return u8 - (char*)dst;
31 }
32
uni_to_utf16(const SkUnichar src[],void * dst,int count)33 static size_t uni_to_utf16(const SkUnichar src[], void* dst, int count) {
34 uint16_t* u16 = (uint16_t*)dst;
35 for (int i = 0; i < count; ++i) {
36 int n = SkToInt(SkUTF::ToUTF16(src[i], u16));
37 u16 += n;
38 }
39 return (char*)u16 - (char*)dst;
40 }
41
uni_to_utf32(const SkUnichar src[],void * dst,int count)42 static size_t uni_to_utf32(const SkUnichar src[], void* dst, int count) {
43 SkUnichar* u32 = (SkUnichar*)dst;
44 if (src != u32) {
45 memcpy(u32, src, count * sizeof(SkUnichar));
46 }
47 return count * sizeof(SkUnichar);
48 }
49
find_first_zero(const uint16_t glyphs[],int count)50 static int find_first_zero(const uint16_t glyphs[], int count) {
51 for (int i = 0; i < count; ++i) {
52 if (0 == glyphs[i]) {
53 return i;
54 }
55 }
56 return count;
57 }
58
DEF_TEST(Paint_cmap,reporter)59 DEF_TEST(Paint_cmap, reporter) {
60 // need to implement charsToGlyphs on other backends (e.g. linux, win)
61 // before we can run this tests everywhere
62 return;
63
64 static const int NGLYPHS = 64;
65
66 SkUnichar src[NGLYPHS];
67 SkUnichar dst[NGLYPHS]; // used for utf8, utf16, utf32 storage
68
69 static const struct {
70 size_t (*fSeedTextProc)(const SkUnichar[], void* dst, int count);
71 SkTextEncoding fEncoding;
72 } gRec[] = {
73 { uni_to_utf8, kUTF8_SkTextEncoding },
74 { uni_to_utf16, kUTF16_SkTextEncoding },
75 { uni_to_utf32, kUTF32_SkTextEncoding },
76 };
77
78 SkRandom rand;
79 SkFont font;
80 font.setTypeface(SkTypeface::MakeDefault());
81 SkTypeface* face = font.getTypefaceOrDefault();
82
83 for (int i = 0; i < 1000; ++i) {
84 // generate some random text
85 for (int j = 0; j < NGLYPHS; ++j) {
86 src[j] = ' ' + j;
87 }
88 // inject some random chars, to sometimes abort early
89 src[rand.nextU() & 63] = rand.nextU() & 0xFFF;
90
91 for (size_t k = 0; k < SK_ARRAY_COUNT(gRec); ++k) {
92 size_t len = gRec[k].fSeedTextProc(src, dst, NGLYPHS);
93
94 uint16_t glyphs0[NGLYPHS], glyphs1[NGLYPHS];
95
96 int nglyphs = font.textToGlyphs(dst, len, gRec[k].fEncoding, glyphs0, NGLYPHS);
97 int first = face->charsToGlyphs(dst, (SkTypeface::Encoding)gRec[k].fEncoding,
98 glyphs1, NGLYPHS);
99 int index = find_first_zero(glyphs1, NGLYPHS);
100
101 REPORTER_ASSERT(reporter, NGLYPHS == nglyphs);
102 REPORTER_ASSERT(reporter, index == first);
103 REPORTER_ASSERT(reporter, 0 == memcmp(glyphs0, glyphs1, NGLYPHS * sizeof(uint16_t)));
104 }
105 }
106 }
107
108 // temparary api for bicubic, just be sure we can set/clear it
DEF_TEST(Paint_filterQuality,reporter)109 DEF_TEST(Paint_filterQuality, reporter) {
110 SkPaint p0, p1;
111
112 REPORTER_ASSERT(reporter, kNone_SkFilterQuality == p0.getFilterQuality());
113
114 static const SkFilterQuality gQualitys[] = {
115 kNone_SkFilterQuality,
116 kLow_SkFilterQuality,
117 kMedium_SkFilterQuality,
118 kHigh_SkFilterQuality
119 };
120 for (size_t i = 0; i < SK_ARRAY_COUNT(gQualitys); ++i) {
121 p0.setFilterQuality(gQualitys[i]);
122 REPORTER_ASSERT(reporter, gQualitys[i] == p0.getFilterQuality());
123 p1 = p0;
124 REPORTER_ASSERT(reporter, gQualitys[i] == p1.getFilterQuality());
125
126 p0.reset();
127 REPORTER_ASSERT(reporter, kNone_SkFilterQuality == p0.getFilterQuality());
128 }
129 }
130
DEF_TEST(Paint_copy,reporter)131 DEF_TEST(Paint_copy, reporter) {
132 SkPaint paint;
133 // set a few member variables
134 paint.setStyle(SkPaint::kStrokeAndFill_Style);
135 paint.setStrokeWidth(SkIntToScalar(2));
136 // set a few pointers
137 SkLayerDrawLooper::Builder looperBuilder;
138 paint.setLooper(looperBuilder.detach());
139 paint.setMaskFilter(SkMaskFilter::MakeBlur(kNormal_SkBlurStyle,
140 SkBlurMask::ConvertRadiusToSigma(1)));
141
142 // copy the paint using the copy constructor and check they are the same
143 SkPaint copiedPaint = paint;
144 REPORTER_ASSERT(reporter, paint.getHash() == copiedPaint.getHash());
145 REPORTER_ASSERT(reporter, paint == copiedPaint);
146
147 // copy the paint using the equal operator and check they are the same
148 copiedPaint = paint;
149 REPORTER_ASSERT(reporter, paint == copiedPaint);
150
151 // clean the paint and check they are back to their initial states
152 SkPaint cleanPaint;
153 paint.reset();
154 copiedPaint.reset();
155 REPORTER_ASSERT(reporter, cleanPaint == paint);
156 REPORTER_ASSERT(reporter, cleanPaint == copiedPaint);
157 }
158
159 // found and fixed for webkit: mishandling when we hit recursion limit on
160 // mostly degenerate cubic flatness test
DEF_TEST(Paint_regression_cubic,reporter)161 DEF_TEST(Paint_regression_cubic, reporter) {
162 SkPath path, stroke;
163 SkPaint paint;
164
165 path.moveTo(460.2881309415525f,
166 303.250847066498f);
167 path.cubicTo(463.36378422175284f,
168 302.1169735073363f,
169 456.32239330810046f,
170 304.720354932878f,
171 453.15255460013304f,
172 305.788586869862f);
173
174 SkRect fillR, strokeR;
175 fillR = path.getBounds();
176
177 paint.setStyle(SkPaint::kStroke_Style);
178 paint.setStrokeWidth(SkIntToScalar(2));
179 paint.getFillPath(path, &stroke);
180 strokeR = stroke.getBounds();
181
182 SkRect maxR = fillR;
183 SkScalar miter = SkMaxScalar(SK_Scalar1, paint.getStrokeMiter());
184 SkScalar inset = paint.getStrokeJoin() == SkPaint::kMiter_Join ?
185 paint.getStrokeWidth() * miter :
186 paint.getStrokeWidth();
187 maxR.inset(-inset, -inset);
188
189 // test that our stroke didn't explode
190 REPORTER_ASSERT(reporter, maxR.contains(strokeR));
191 }
192
DEF_TEST(Paint_flattening,reporter)193 DEF_TEST(Paint_flattening, reporter) {
194 const SkFilterQuality levels[] = {
195 kNone_SkFilterQuality,
196 kLow_SkFilterQuality,
197 kMedium_SkFilterQuality,
198 kHigh_SkFilterQuality,
199 };
200 const SkPaint::Cap caps[] = {
201 SkPaint::kButt_Cap,
202 SkPaint::kRound_Cap,
203 SkPaint::kSquare_Cap,
204 };
205 const SkPaint::Join joins[] = {
206 SkPaint::kMiter_Join,
207 SkPaint::kRound_Join,
208 SkPaint::kBevel_Join,
209 };
210 const SkPaint::Style styles[] = {
211 SkPaint::kFill_Style,
212 SkPaint::kStroke_Style,
213 SkPaint::kStrokeAndFill_Style,
214 };
215
216 #define FOR_SETUP(index, array, setter) \
217 for (size_t index = 0; index < SK_ARRAY_COUNT(array); ++index) { \
218 paint.setter(array[index]);
219
220 SkPaint paint;
221 paint.setAntiAlias(true);
222
223 // we don't serialize hinting or encoding -- soon to be removed from paint
224
225 FOR_SETUP(i, levels, setFilterQuality)
226 FOR_SETUP(l, caps, setStrokeCap)
227 FOR_SETUP(m, joins, setStrokeJoin)
228 FOR_SETUP(p, styles, setStyle)
229
230 SkBinaryWriteBuffer writer;
231 SkPaintPriv::Flatten(paint, writer);
232
233 SkAutoMalloc buf(writer.bytesWritten());
234 writer.writeToMemory(buf.get());
235 SkReadBuffer reader(buf.get(), writer.bytesWritten());
236
237 SkPaint paint2;
238 SkPaintPriv::Unflatten(&paint2, reader, nullptr);
239 REPORTER_ASSERT(reporter, paint2 == paint);
240
241 }}}}
242 #undef FOR_SETUP
243
244 }
245
246 // found and fixed for android: not initializing rect for string's of length 0
247 DEF_TEST(Paint_regression_measureText, reporter) {
248
249 SkFont font;
250 font.setSize(12.0f);
251
252 SkRect r;
253 r.setLTRB(SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN, SK_ScalarNaN);
254
255 // test that the rect was reset
256 font.measureText("", 0, kUTF8_SkTextEncoding, &r);
257 REPORTER_ASSERT(reporter, r.isEmpty());
258 }
259
260 #define ASSERT(expr) REPORTER_ASSERT(r, expr)
261
262 DEF_TEST(Paint_MoreFlattening, r) {
263 SkPaint paint;
264 paint.setColor(0x00AABBCC);
265 paint.setBlendMode(SkBlendMode::kModulate);
266 paint.setLooper(nullptr); // Default value, ignored.
267
268 SkBinaryWriteBuffer writer;
269 SkPaintPriv::Flatten(paint, writer);
270
271 SkAutoMalloc buf(writer.bytesWritten());
272 writer.writeToMemory(buf.get());
273 SkReadBuffer reader(buf.get(), writer.bytesWritten());
274
275 SkPaint other;
276 SkPaintPriv::Unflatten(&other, reader, nullptr);
277 ASSERT(reader.offset() == writer.bytesWritten());
278
279 // No matter the encoding, these must always hold.
280 ASSERT(other.getColor() == paint.getColor());
281 ASSERT(other.getLooper() == paint.getLooper());
282 ASSERT(other.getBlendMode() == paint.getBlendMode());
283 }
284
285 DEF_TEST(Paint_getHash, r) {
286 // Try not to inspect the actual hash values in here.
287 // We might want to change the hash function.
288
289 SkPaint paint;
290 const uint32_t defaultHash = paint.getHash();
291
292 // Check that some arbitrary field affects the hash.
293 paint.setColor(0xFF00FF00);
294 REPORTER_ASSERT(r, paint.getHash() != defaultHash);
295 paint.setColor(SK_ColorBLACK); // Reset to default value.
296 REPORTER_ASSERT(r, paint.getHash() == defaultHash);
297
298 // This is part of fBitfields, the last field we hash.
299 paint.setBlendMode(SkBlendMode::kSrc);
300 REPORTER_ASSERT(r, paint.getHash() != defaultHash);
301 paint.setBlendMode(SkBlendMode::kSrcOver);
302 REPORTER_ASSERT(r, paint.getHash() == defaultHash);
303 }
304
305 #include "SkColorMatrixFilter.h"
306
307 DEF_TEST(Paint_nothingToDraw, r) {
308 SkPaint paint;
309
310 REPORTER_ASSERT(r, !paint.nothingToDraw());
311 paint.setAlpha(0);
312 REPORTER_ASSERT(r, paint.nothingToDraw());
313
314 paint.setAlpha(0xFF);
315 paint.setBlendMode(SkBlendMode::kDst);
316 REPORTER_ASSERT(r, paint.nothingToDraw());
317
318 paint.setAlpha(0);
319 paint.setBlendMode(SkBlendMode::kSrcOver);
320
321 SkColorMatrix cm;
322 cm.setIdentity(); // does not change alpha
323 paint.setColorFilter(SkColorFilter::MakeMatrixFilterRowMajor255(cm.fMat));
324 REPORTER_ASSERT(r, paint.nothingToDraw());
325
326 cm.postTranslate(0, 0, 0, 1); // wacks alpha
327 paint.setColorFilter(SkColorFilter::MakeMatrixFilterRowMajor255(cm.fMat));
328 REPORTER_ASSERT(r, !paint.nothingToDraw());
329 }
330
331 DEF_TEST(Font_getpos, r) {
332 SkFont font;
333 const char text[] = "Hamburgefons!@#!#23425,./;'[]";
334 int count = font.countText(text, strlen(text), kUTF8_SkTextEncoding);
335 SkAutoTArray<uint16_t> glyphStorage(count);
336 uint16_t* glyphs = glyphStorage.get();
337 (void)font.textToGlyphs(text, strlen(text), kUTF8_SkTextEncoding, glyphs, count);
338
339 SkAutoTArray<SkScalar> widthStorage(count);
340 SkAutoTArray<SkScalar> xposStorage(count);
341 SkAutoTArray<SkPoint> posStorage(count);
342
343 SkScalar* widths = widthStorage.get();
344 SkScalar* xpos = xposStorage.get();
345 SkPoint* pos = posStorage.get();
346
347 for (bool subpix : { false, true }) {
348 font.setSubpixel(subpix);
349 for (auto hint : { kNo_SkFontHinting, kSlight_SkFontHinting, kNormal_SkFontHinting, kFull_SkFontHinting}) {
350 font.setHinting(hint);
351 for (auto size : { 1.0f, 12.0f, 100.0f }) {
352 font.setSize(size);
353
354 font.getWidths(glyphs, count, widths);
355 font.getXPos(glyphs, count, xpos, 10);
356 font.getPos(glyphs, count, pos, {10, 20});
357
358 auto nearly_eq = [](SkScalar a, SkScalar b) {
359 return SkScalarAbs(a - b) < 0.000001f;
360 };
361
362 SkScalar x = 10;
363 for (int i = 0; i < count; ++i) {
364 REPORTER_ASSERT(r, nearly_eq(x, xpos[i]));
365 REPORTER_ASSERT(r, nearly_eq(x, pos[i].fX));
366 REPORTER_ASSERT(r, nearly_eq(20, pos[i].fY));
367 x += widths[i];
368 }
369 }
370 }
371 }
372 }
373