1 /*
2 * Copyright 2015 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 "SkTableColorFilter.h"
9 #include "SkPM4f.h"
10 #include "SkArenaAlloc.h"
11 #include "SkBitmap.h"
12 #include "SkColorData.h"
13 #include "SkRasterPipeline.h"
14 #include "SkReadBuffer.h"
15 #include "SkString.h"
16 #include "SkUnPreMultiply.h"
17 #include "SkWriteBuffer.h"
18
19 static const uint8_t gIdentityTable[] = {
20 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
21 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
22 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
23 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
24 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
25 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
26 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
27 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
28 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
29 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
30 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
31 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
32 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
33 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
34 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
35 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
36 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
37 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
38 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
39 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
40 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
41 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
42 0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
43 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
44 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
45 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
46 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
47 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
48 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
49 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
50 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
51 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
52 };
53
54 class SkTable_ColorFilter : public SkColorFilter {
55 public:
SkTable_ColorFilter(const uint8_t tableA[],const uint8_t tableR[],const uint8_t tableG[],const uint8_t tableB[])56 SkTable_ColorFilter(const uint8_t tableA[], const uint8_t tableR[],
57 const uint8_t tableG[], const uint8_t tableB[]) {
58 fBitmap = nullptr;
59 fFlags = 0;
60
61 uint8_t* dst = fStorage;
62 if (tableA) {
63 memcpy(dst, tableA, 256);
64 dst += 256;
65 fFlags |= kA_Flag;
66 }
67 if (tableR) {
68 memcpy(dst, tableR, 256);
69 dst += 256;
70 fFlags |= kR_Flag;
71 }
72 if (tableG) {
73 memcpy(dst, tableG, 256);
74 dst += 256;
75 fFlags |= kG_Flag;
76 }
77 if (tableB) {
78 memcpy(dst, tableB, 256);
79 fFlags |= kB_Flag;
80 }
81 }
82
~SkTable_ColorFilter()83 ~SkTable_ColorFilter() override { delete fBitmap; }
84
85 bool asComponentTable(SkBitmap* table) const override;
86 sk_sp<SkColorFilter> onMakeComposed(sk_sp<SkColorFilter> inner) const override;
87
88 #if SK_SUPPORT_GPU
89 std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(
90 GrContext*, const GrColorSpaceInfo&) const override;
91 #endif
92
93 SK_TO_STRING_OVERRIDE()
94
95 SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkTable_ColorFilter)
96
97 enum {
98 kA_Flag = 1 << 0,
99 kR_Flag = 1 << 1,
100 kG_Flag = 1 << 2,
101 kB_Flag = 1 << 3,
102 };
103
onAppendStages(SkRasterPipeline * p,SkColorSpace *,SkArenaAlloc * alloc,bool shaderIsOpaque) const104 void onAppendStages(SkRasterPipeline* p, SkColorSpace*, SkArenaAlloc* alloc,
105 bool shaderIsOpaque) const override {
106 const uint8_t *r = gIdentityTable,
107 *g = gIdentityTable,
108 *b = gIdentityTable,
109 *a = gIdentityTable;
110 const uint8_t* ptr = fStorage;
111 if (fFlags & kA_Flag) { a = ptr; ptr += 256; }
112 if (fFlags & kR_Flag) { r = ptr; ptr += 256; }
113 if (fFlags & kG_Flag) { g = ptr; ptr += 256; }
114 if (fFlags & kB_Flag) { b = ptr; }
115
116 if (!shaderIsOpaque) {
117 p->append(SkRasterPipeline::unpremul);
118 }
119
120 struct Tables { const uint8_t *r, *g, *b, *a; };
121 p->append(SkRasterPipeline::byte_tables, alloc->make<Tables>(Tables{r,g,b,a}));
122
123 bool definitelyOpaque = shaderIsOpaque && a[0xff] == 0xff;
124 if (!definitelyOpaque) {
125 p->append(SkRasterPipeline::premul);
126 }
127 }
128
129 protected:
130 void flatten(SkWriteBuffer&) const override;
131
132 private:
133 mutable const SkBitmap* fBitmap; // lazily allocated
134
135 uint8_t fStorage[256 * 4];
136 unsigned fFlags;
137
138 friend class SkTableColorFilter;
139
140 typedef SkColorFilter INHERITED;
141 };
142
143 #ifndef SK_IGNORE_TO_STRING
toString(SkString * str) const144 void SkTable_ColorFilter::toString(SkString* str) const {
145 const uint8_t* table = fStorage;
146 const uint8_t* tableA = gIdentityTable;
147 const uint8_t* tableR = gIdentityTable;
148 const uint8_t* tableG = gIdentityTable;
149 const uint8_t* tableB = gIdentityTable;
150 if (fFlags & kA_Flag) {
151 tableA = table; table += 256;
152 }
153 if (fFlags & kR_Flag) {
154 tableR = table; table += 256;
155 }
156 if (fFlags & kG_Flag) {
157 tableG = table; table += 256;
158 }
159 if (fFlags & kB_Flag) {
160 tableB = table;
161 }
162
163 str->append("SkTable_ColorFilter (");
164
165 for (int i = 0; i < 256; ++i) {
166 str->appendf("%d: %d,%d,%d,%d\n",
167 i, tableR[i], tableG[i], tableB[i], tableA[i]);
168 }
169
170 str->append(")");
171 }
172 #endif
173
174 static const uint8_t gCountNibBits[] = {
175 0, 1, 1, 2,
176 1, 2, 2, 3,
177 1, 2, 2, 3,
178 2, 3, 3, 4
179 };
180
181 #include "SkPackBits.h"
182
flatten(SkWriteBuffer & buffer) const183 void SkTable_ColorFilter::flatten(SkWriteBuffer& buffer) const {
184 uint8_t storage[5*256];
185 int count = gCountNibBits[fFlags & 0xF];
186 size_t size = SkPackBits::Pack8(fStorage, count * 256, storage,
187 sizeof(storage));
188
189 buffer.write32(fFlags);
190 buffer.writeByteArray(storage, size);
191 }
192
CreateProc(SkReadBuffer & buffer)193 sk_sp<SkFlattenable> SkTable_ColorFilter::CreateProc(SkReadBuffer& buffer) {
194 const int flags = buffer.read32();
195 const size_t count = gCountNibBits[flags & 0xF];
196 SkASSERT(count <= 4);
197
198 uint8_t packedStorage[5*256];
199 size_t packedSize = buffer.getArrayCount();
200 if (!buffer.validate(packedSize <= sizeof(packedStorage))) {
201 return nullptr;
202 }
203 if (!buffer.readByteArray(packedStorage, packedSize)) {
204 return nullptr;
205 }
206
207 uint8_t unpackedStorage[4*256];
208 size_t unpackedSize = SkPackBits::Unpack8(packedStorage, packedSize,
209 unpackedStorage, sizeof(unpackedStorage));
210 // now check that we got the size we expected
211 if (!buffer.validate(unpackedSize == count*256)) {
212 return nullptr;
213 }
214
215 const uint8_t* a = nullptr;
216 const uint8_t* r = nullptr;
217 const uint8_t* g = nullptr;
218 const uint8_t* b = nullptr;
219 const uint8_t* ptr = unpackedStorage;
220
221 if (flags & kA_Flag) {
222 a = ptr;
223 ptr += 256;
224 }
225 if (flags & kR_Flag) {
226 r = ptr;
227 ptr += 256;
228 }
229 if (flags & kG_Flag) {
230 g = ptr;
231 ptr += 256;
232 }
233 if (flags & kB_Flag) {
234 b = ptr;
235 ptr += 256;
236 }
237 return SkTableColorFilter::MakeARGB(a, r, g, b);
238 }
239
asComponentTable(SkBitmap * table) const240 bool SkTable_ColorFilter::asComponentTable(SkBitmap* table) const {
241 if (table) {
242 if (nullptr == fBitmap) {
243 SkBitmap* bmp = new SkBitmap;
244 bmp->allocPixels(SkImageInfo::MakeA8(256, 4));
245 uint8_t* bitmapPixels = bmp->getAddr8(0, 0);
246 int offset = 0;
247 static const unsigned kFlags[] = { kA_Flag, kR_Flag, kG_Flag, kB_Flag };
248
249 for (int x = 0; x < 4; ++x) {
250 if (!(fFlags & kFlags[x])) {
251 memcpy(bitmapPixels, gIdentityTable, sizeof(gIdentityTable));
252 } else {
253 memcpy(bitmapPixels, fStorage + offset, 256);
254 offset += 256;
255 }
256 bitmapPixels += 256;
257 }
258 fBitmap = bmp;
259 }
260 *table = *fBitmap;
261 }
262 return true;
263 }
264
265 // Combines the two lookup tables so that making a lookup using res[] has
266 // the same effect as making a lookup through inner[] then outer[].
combine_tables(uint8_t res[256],const uint8_t outer[256],const uint8_t inner[256])267 static void combine_tables(uint8_t res[256], const uint8_t outer[256], const uint8_t inner[256]) {
268 for (int i = 0; i < 256; i++) {
269 res[i] = outer[inner[i]];
270 }
271 }
272
onMakeComposed(sk_sp<SkColorFilter> innerFilter) const273 sk_sp<SkColorFilter> SkTable_ColorFilter::onMakeComposed(sk_sp<SkColorFilter> innerFilter) const {
274 SkBitmap innerBM;
275 if (!innerFilter->asComponentTable(&innerBM)) {
276 return nullptr;
277 }
278
279 if (nullptr == innerBM.getPixels()) {
280 return nullptr;
281 }
282
283 const uint8_t* table = fStorage;
284 const uint8_t* tableA = gIdentityTable;
285 const uint8_t* tableR = gIdentityTable;
286 const uint8_t* tableG = gIdentityTable;
287 const uint8_t* tableB = gIdentityTable;
288 if (fFlags & kA_Flag) {
289 tableA = table; table += 256;
290 }
291 if (fFlags & kR_Flag) {
292 tableR = table; table += 256;
293 }
294 if (fFlags & kG_Flag) {
295 tableG = table; table += 256;
296 }
297 if (fFlags & kB_Flag) {
298 tableB = table;
299 }
300
301 uint8_t concatA[256];
302 uint8_t concatR[256];
303 uint8_t concatG[256];
304 uint8_t concatB[256];
305
306 combine_tables(concatA, tableA, innerBM.getAddr8(0, 0));
307 combine_tables(concatR, tableR, innerBM.getAddr8(0, 1));
308 combine_tables(concatG, tableG, innerBM.getAddr8(0, 2));
309 combine_tables(concatB, tableB, innerBM.getAddr8(0, 3));
310
311 return SkTableColorFilter::MakeARGB(concatA, concatR, concatG, concatB);
312 }
313
314 #if SK_SUPPORT_GPU
315
316 #include "GrColorSpaceInfo.h"
317 #include "GrContext.h"
318 #include "GrContextPriv.h"
319 #include "GrFragmentProcessor.h"
320 #include "GrTextureStripAtlas.h"
321 #include "SkGr.h"
322 #include "glsl/GrGLSLFragmentProcessor.h"
323 #include "glsl/GrGLSLFragmentShaderBuilder.h"
324 #include "glsl/GrGLSLProgramDataManager.h"
325 #include "glsl/GrGLSLUniformHandler.h"
326
327 class ColorTableEffect : public GrFragmentProcessor {
328 public:
329 static std::unique_ptr<GrFragmentProcessor> Make(GrContext* context, const SkBitmap& bitmap);
330
331 ~ColorTableEffect() override;
332
name() const333 const char* name() const override { return "ColorTable"; }
334
atlas() const335 const GrTextureStripAtlas* atlas() const { return fAtlas; }
atlasRow() const336 int atlasRow() const { return fRow; }
337
338 std::unique_ptr<GrFragmentProcessor> clone() const override;
339
340 private:
341 GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
342
343 void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override;
344
345 bool onIsEqual(const GrFragmentProcessor&) const override;
346
347 ColorTableEffect(sk_sp<GrTextureProxy> proxy, GrTextureStripAtlas* atlas, int row);
348
349 GR_DECLARE_FRAGMENT_PROCESSOR_TEST
350
351 TextureSampler fTextureSampler;
352 GrTextureStripAtlas* fAtlas;
353 int fRow;
354
355 typedef GrFragmentProcessor INHERITED;
356 };
357
358 class GLColorTableEffect : public GrGLSLFragmentProcessor {
359 public:
360 void emitCode(EmitArgs&) override;
361
GenKey(const GrProcessor &,const GrShaderCaps &,GrProcessorKeyBuilder *)362 static void GenKey(const GrProcessor&, const GrShaderCaps&, GrProcessorKeyBuilder*) {}
363
364 protected:
365 void onSetData(const GrGLSLProgramDataManager&, const GrFragmentProcessor&) override;
366
367 private:
368 UniformHandle fRGBAYValuesUni;
369 typedef GrGLSLFragmentProcessor INHERITED;
370 };
371
onSetData(const GrGLSLProgramDataManager & pdm,const GrFragmentProcessor & proc)372 void GLColorTableEffect::onSetData(const GrGLSLProgramDataManager& pdm,
373 const GrFragmentProcessor& proc) {
374 // The textures are organized in a strip where the rows are ordered a, r, g, b.
375 float rgbaYValues[4];
376 const ColorTableEffect& cte = proc.cast<ColorTableEffect>();
377 if (cte.atlas()) {
378 SkScalar yDelta = cte.atlas()->getNormalizedTexelHeight();
379 rgbaYValues[3] = cte.atlas()->getYOffset(cte.atlasRow()) + SK_ScalarHalf * yDelta;
380 rgbaYValues[0] = rgbaYValues[3] + yDelta;
381 rgbaYValues[1] = rgbaYValues[0] + yDelta;
382 rgbaYValues[2] = rgbaYValues[1] + yDelta;
383 } else {
384 rgbaYValues[3] = 0.125;
385 rgbaYValues[0] = 0.375;
386 rgbaYValues[1] = 0.625;
387 rgbaYValues[2] = 0.875;
388 }
389 pdm.set4fv(fRGBAYValuesUni, 1, rgbaYValues);
390 }
391
emitCode(EmitArgs & args)392 void GLColorTableEffect::emitCode(EmitArgs& args) {
393 const char* yoffsets;
394 fRGBAYValuesUni = args.fUniformHandler->addUniform(kFragment_GrShaderFlag, kHalf4_GrSLType,
395 "yoffsets", &yoffsets);
396 static const float kColorScaleFactor = 255.0f / 256.0f;
397 static const float kColorOffsetFactor = 1.0f / 512.0f;
398 GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
399 if (nullptr == args.fInputColor) {
400 // the input color is solid white (all ones).
401 static const float kMaxValue = kColorScaleFactor + kColorOffsetFactor;
402 fragBuilder->codeAppendf("\t\thalf4 coord = half4(%f, %f, %f, %f);\n",
403 kMaxValue, kMaxValue, kMaxValue, kMaxValue);
404
405 } else {
406 fragBuilder->codeAppendf("\t\thalf nonZeroAlpha = max(%s.a, .0001);\n", args.fInputColor);
407 fragBuilder->codeAppendf("\t\thalf4 coord = half4(%s.rgb / nonZeroAlpha, nonZeroAlpha);\n",
408 args.fInputColor);
409 fragBuilder->codeAppendf("\t\tcoord = coord * %f + half4(%f, %f, %f, %f);\n",
410 kColorScaleFactor,
411 kColorOffsetFactor, kColorOffsetFactor,
412 kColorOffsetFactor, kColorOffsetFactor);
413 }
414
415 SkString coord;
416
417 fragBuilder->codeAppendf("\t\t%s.a = ", args.fOutputColor);
418 coord.printf("half2(coord.a, %s.a)", yoffsets);
419 fragBuilder->appendTextureLookup(args.fTexSamplers[0], coord.c_str());
420 fragBuilder->codeAppend(".a;\n");
421
422 fragBuilder->codeAppendf("\t\t%s.r = ", args.fOutputColor);
423 coord.printf("half2(coord.r, %s.r)", yoffsets);
424 fragBuilder->appendTextureLookup(args.fTexSamplers[0], coord.c_str());
425 fragBuilder->codeAppend(".a;\n");
426
427 fragBuilder->codeAppendf("\t\t%s.g = ", args.fOutputColor);
428 coord.printf("half2(coord.g, %s.g)", yoffsets);
429 fragBuilder->appendTextureLookup(args.fTexSamplers[0], coord.c_str());
430 fragBuilder->codeAppend(".a;\n");
431
432 fragBuilder->codeAppendf("\t\t%s.b = ", args.fOutputColor);
433 coord.printf("half2(coord.b, %s.b)", yoffsets);
434 fragBuilder->appendTextureLookup(args.fTexSamplers[0], coord.c_str());
435 fragBuilder->codeAppend(".a;\n");
436
437 fragBuilder->codeAppendf("\t\t%s.rgb *= %s.a;\n", args.fOutputColor, args.fOutputColor);
438 }
439
440 ///////////////////////////////////////////////////////////////////////////////
Make(GrContext * context,const SkBitmap & bitmap)441 std::unique_ptr<GrFragmentProcessor> ColorTableEffect::Make(GrContext* context,
442 const SkBitmap& bitmap) {
443 GrTextureStripAtlas::Desc desc;
444 desc.fWidth = bitmap.width();
445 desc.fHeight = 128;
446 desc.fRowHeight = bitmap.height();
447 // TODO: this seems a bit heavy handed (passing a GrContext as part of the desc)
448 desc.fContext = context;
449 desc.fConfig = SkImageInfo2GrPixelConfig(bitmap.info(), *context->caps());
450
451 if (kUnknown_GrPixelConfig == desc.fConfig) {
452 return nullptr;
453 }
454
455 GrTextureStripAtlas* atlas = GrTextureStripAtlas::GetAtlas(desc);
456 int row = atlas->lockRow(bitmap);
457 sk_sp<GrTextureProxy> proxy;
458 if (-1 == row) {
459 atlas = nullptr;
460
461 SkASSERT(bitmap.isImmutable());
462
463 sk_sp<SkImage> srcImage = SkImage::MakeFromBitmap(bitmap);
464 if (!srcImage) {
465 return nullptr;
466 }
467
468 proxy = GrMakeCachedImageProxy(context->contextPriv().proxyProvider(), std::move(srcImage));
469 } else {
470 proxy = atlas->asTextureProxyRef();
471 }
472
473 if (!proxy) {
474 return nullptr;
475 }
476
477 return std::unique_ptr<GrFragmentProcessor>(new ColorTableEffect(std::move(proxy), atlas, row));
478 }
479
ColorTableEffect(sk_sp<GrTextureProxy> proxy,GrTextureStripAtlas * atlas,int row)480 ColorTableEffect::ColorTableEffect(sk_sp<GrTextureProxy> proxy, GrTextureStripAtlas* atlas, int row)
481 : INHERITED(kColorTableEffect_ClassID,
482 kNone_OptimizationFlags) // Not bothering with table-specific optimizations.
483 , fTextureSampler(std::move(proxy))
484 , fAtlas(atlas)
485 , fRow(row) {
486 this->addTextureSampler(&fTextureSampler);
487 }
488
~ColorTableEffect()489 ColorTableEffect::~ColorTableEffect() {
490 if (fAtlas) {
491 fAtlas->unlockRow(fRow);
492 }
493 }
494
clone() const495 std::unique_ptr<GrFragmentProcessor> ColorTableEffect::clone() const {
496 fAtlas->lockRow(fRow);
497 return std::unique_ptr<GrFragmentProcessor>(
498 new ColorTableEffect(sk_ref_sp(fTextureSampler.proxy()), fAtlas, fRow));
499 }
500
onGetGLSLProcessorKey(const GrShaderCaps & caps,GrProcessorKeyBuilder * b) const501 void ColorTableEffect::onGetGLSLProcessorKey(const GrShaderCaps& caps,
502 GrProcessorKeyBuilder* b) const {
503 GLColorTableEffect::GenKey(*this, caps, b);
504 }
505
onCreateGLSLInstance() const506 GrGLSLFragmentProcessor* ColorTableEffect::onCreateGLSLInstance() const {
507 return new GLColorTableEffect;
508 }
509
onIsEqual(const GrFragmentProcessor & other) const510 bool ColorTableEffect::onIsEqual(const GrFragmentProcessor& other) const {
511 // For non-atlased instances, the texture (compared by base class) is sufficient to
512 // differentiate different tables. For atlased instances we ensure they are using the
513 // same row.
514 const ColorTableEffect& that = other.cast<ColorTableEffect>();
515 SkASSERT(SkToBool(fAtlas) == SkToBool(that.fAtlas));
516 // Ok to always do this comparison since both would be -1 if non-atlased.
517 return fRow == that.fRow;
518 }
519
520 ///////////////////////////////////////////////////////////////////////////////
521
522 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(ColorTableEffect);
523
524 #if GR_TEST_UTILS
TestCreate(GrProcessorTestData * d)525 std::unique_ptr<GrFragmentProcessor> ColorTableEffect::TestCreate(GrProcessorTestData* d) {
526 int flags = 0;
527 uint8_t luts[256][4];
528 do {
529 for (int i = 0; i < 4; ++i) {
530 flags |= d->fRandom->nextBool() ? (1 << i): 0;
531 }
532 } while (!flags);
533 for (int i = 0; i < 4; ++i) {
534 if (flags & (1 << i)) {
535 for (int j = 0; j < 256; ++j) {
536 luts[j][i] = SkToU8(d->fRandom->nextBits(8));
537 }
538 }
539 }
540 auto filter(SkTableColorFilter::MakeARGB(
541 (flags & (1 << 0)) ? luts[0] : nullptr,
542 (flags & (1 << 1)) ? luts[1] : nullptr,
543 (flags & (1 << 2)) ? luts[2] : nullptr,
544 (flags & (1 << 3)) ? luts[3] : nullptr
545 ));
546 sk_sp<SkColorSpace> colorSpace = GrTest::TestColorSpace(d->fRandom);
547 auto fp = filter->asFragmentProcessor(
548 d->context(), GrColorSpaceInfo(std::move(colorSpace), kRGBA_8888_GrPixelConfig));
549 SkASSERT(fp);
550 return fp;
551 }
552 #endif
553
asFragmentProcessor(GrContext * context,const GrColorSpaceInfo &) const554 std::unique_ptr<GrFragmentProcessor> SkTable_ColorFilter::asFragmentProcessor(
555 GrContext* context, const GrColorSpaceInfo&) const {
556 SkBitmap bitmap;
557 this->asComponentTable(&bitmap);
558
559 return ColorTableEffect::Make(context, bitmap);
560 }
561
562 #endif // SK_SUPPORT_GPU
563
564 ///////////////////////////////////////////////////////////////////////////////
565
Make(const uint8_t table[256])566 sk_sp<SkColorFilter> SkTableColorFilter::Make(const uint8_t table[256]) {
567 return sk_make_sp<SkTable_ColorFilter>(table, table, table, table);
568 }
569
MakeARGB(const uint8_t tableA[256],const uint8_t tableR[256],const uint8_t tableG[256],const uint8_t tableB[256])570 sk_sp<SkColorFilter> SkTableColorFilter::MakeARGB(const uint8_t tableA[256],
571 const uint8_t tableR[256],
572 const uint8_t tableG[256],
573 const uint8_t tableB[256]) {
574 return sk_make_sp<SkTable_ColorFilter>(tableA, tableR, tableG, tableB);
575 }
576
577 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(SkTableColorFilter)
578 SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(SkTable_ColorFilter)
579 SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END
580