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- /*
- * Copyright 2015 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
- #include "include/effects/SkTableColorFilter.h"
- #include "include/core/SkBitmap.h"
- #include "include/core/SkString.h"
- #include "include/core/SkUnPreMultiply.h"
- #include "include/private/SkColorData.h"
- #include "include/private/SkTo.h"
- #include "src/core/SkArenaAlloc.h"
- #include "src/core/SkEffectPriv.h"
- #include "src/core/SkRasterPipeline.h"
- #include "src/core/SkReadBuffer.h"
- #include "src/core/SkWriteBuffer.h"
- static const uint8_t gIdentityTable[] = {
- 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
- 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F,
- 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
- 0x18, 0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E, 0x1F,
- 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
- 0x28, 0x29, 0x2A, 0x2B, 0x2C, 0x2D, 0x2E, 0x2F,
- 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
- 0x38, 0x39, 0x3A, 0x3B, 0x3C, 0x3D, 0x3E, 0x3F,
- 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
- 0x48, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x4E, 0x4F,
- 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
- 0x58, 0x59, 0x5A, 0x5B, 0x5C, 0x5D, 0x5E, 0x5F,
- 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
- 0x68, 0x69, 0x6A, 0x6B, 0x6C, 0x6D, 0x6E, 0x6F,
- 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
- 0x78, 0x79, 0x7A, 0x7B, 0x7C, 0x7D, 0x7E, 0x7F,
- 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
- 0x88, 0x89, 0x8A, 0x8B, 0x8C, 0x8D, 0x8E, 0x8F,
- 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
- 0x98, 0x99, 0x9A, 0x9B, 0x9C, 0x9D, 0x9E, 0x9F,
- 0xA0, 0xA1, 0xA2, 0xA3, 0xA4, 0xA5, 0xA6, 0xA7,
- 0xA8, 0xA9, 0xAA, 0xAB, 0xAC, 0xAD, 0xAE, 0xAF,
- 0xB0, 0xB1, 0xB2, 0xB3, 0xB4, 0xB5, 0xB6, 0xB7,
- 0xB8, 0xB9, 0xBA, 0xBB, 0xBC, 0xBD, 0xBE, 0xBF,
- 0xC0, 0xC1, 0xC2, 0xC3, 0xC4, 0xC5, 0xC6, 0xC7,
- 0xC8, 0xC9, 0xCA, 0xCB, 0xCC, 0xCD, 0xCE, 0xCF,
- 0xD0, 0xD1, 0xD2, 0xD3, 0xD4, 0xD5, 0xD6, 0xD7,
- 0xD8, 0xD9, 0xDA, 0xDB, 0xDC, 0xDD, 0xDE, 0xDF,
- 0xE0, 0xE1, 0xE2, 0xE3, 0xE4, 0xE5, 0xE6, 0xE7,
- 0xE8, 0xE9, 0xEA, 0xEB, 0xEC, 0xED, 0xEE, 0xEF,
- 0xF0, 0xF1, 0xF2, 0xF3, 0xF4, 0xF5, 0xF6, 0xF7,
- 0xF8, 0xF9, 0xFA, 0xFB, 0xFC, 0xFD, 0xFE, 0xFF
- };
- class SkTable_ColorFilter : public SkColorFilter {
- public:
- SkTable_ColorFilter(const uint8_t tableA[], const uint8_t tableR[],
- const uint8_t tableG[], const uint8_t tableB[]) {
- fBitmap = nullptr;
- fFlags = 0;
- uint8_t* dst = fStorage;
- if (tableA) {
- memcpy(dst, tableA, 256);
- dst += 256;
- fFlags |= kA_Flag;
- }
- if (tableR) {
- memcpy(dst, tableR, 256);
- dst += 256;
- fFlags |= kR_Flag;
- }
- if (tableG) {
- memcpy(dst, tableG, 256);
- dst += 256;
- fFlags |= kG_Flag;
- }
- if (tableB) {
- memcpy(dst, tableB, 256);
- fFlags |= kB_Flag;
- }
- }
- ~SkTable_ColorFilter() override { delete fBitmap; }
- #if SK_SUPPORT_GPU
- std::unique_ptr<GrFragmentProcessor> asFragmentProcessor(
- GrRecordingContext*, const GrColorSpaceInfo&) const override;
- #endif
- enum {
- kA_Flag = 1 << 0,
- kR_Flag = 1 << 1,
- kG_Flag = 1 << 2,
- kB_Flag = 1 << 3,
- };
- bool onAppendStages(const SkStageRec& rec, bool shaderIsOpaque) const override {
- const uint8_t *r = gIdentityTable,
- *g = gIdentityTable,
- *b = gIdentityTable,
- *a = gIdentityTable;
- const uint8_t* ptr = fStorage;
- if (fFlags & kA_Flag) { a = ptr; ptr += 256; }
- if (fFlags & kR_Flag) { r = ptr; ptr += 256; }
- if (fFlags & kG_Flag) { g = ptr; ptr += 256; }
- if (fFlags & kB_Flag) { b = ptr; }
- SkRasterPipeline* p = rec.fPipeline;
- if (!shaderIsOpaque) {
- p->append(SkRasterPipeline::unpremul);
- }
- struct Tables { const uint8_t *r, *g, *b, *a; };
- p->append(SkRasterPipeline::byte_tables, rec.fAlloc->make<Tables>(Tables{r,g,b,a}));
- bool definitelyOpaque = shaderIsOpaque && a[0xff] == 0xff;
- if (!definitelyOpaque) {
- p->append(SkRasterPipeline::premul);
- }
- return true;
- }
- protected:
- void flatten(SkWriteBuffer&) const override;
- private:
- SK_FLATTENABLE_HOOKS(SkTable_ColorFilter)
- void getTableAsBitmap(SkBitmap* table) const;
- mutable const SkBitmap* fBitmap; // lazily allocated
- uint8_t fStorage[256 * 4];
- unsigned fFlags;
- friend class SkTableColorFilter;
- typedef SkColorFilter INHERITED;
- };
- static const uint8_t gCountNibBits[] = {
- 0, 1, 1, 2,
- 1, 2, 2, 3,
- 1, 2, 2, 3,
- 2, 3, 3, 4
- };
- #include "src/effects/SkPackBits.h"
- void SkTable_ColorFilter::flatten(SkWriteBuffer& buffer) const {
- uint8_t storage[5*256];
- int count = gCountNibBits[fFlags & 0xF];
- size_t size = SkPackBits::Pack8(fStorage, count * 256, storage,
- sizeof(storage));
- buffer.write32(fFlags);
- buffer.writeByteArray(storage, size);
- }
- sk_sp<SkFlattenable> SkTable_ColorFilter::CreateProc(SkReadBuffer& buffer) {
- const int flags = buffer.read32();
- const size_t count = gCountNibBits[flags & 0xF];
- SkASSERT(count <= 4);
- uint8_t packedStorage[5*256];
- size_t packedSize = buffer.getArrayCount();
- if (!buffer.validate(packedSize <= sizeof(packedStorage))) {
- return nullptr;
- }
- if (!buffer.readByteArray(packedStorage, packedSize)) {
- return nullptr;
- }
- uint8_t unpackedStorage[4*256];
- size_t unpackedSize = SkPackBits::Unpack8(packedStorage, packedSize,
- unpackedStorage, sizeof(unpackedStorage));
- // now check that we got the size we expected
- if (!buffer.validate(unpackedSize == count*256)) {
- return nullptr;
- }
- const uint8_t* a = nullptr;
- const uint8_t* r = nullptr;
- const uint8_t* g = nullptr;
- const uint8_t* b = nullptr;
- const uint8_t* ptr = unpackedStorage;
- if (flags & kA_Flag) {
- a = ptr;
- ptr += 256;
- }
- if (flags & kR_Flag) {
- r = ptr;
- ptr += 256;
- }
- if (flags & kG_Flag) {
- g = ptr;
- ptr += 256;
- }
- if (flags & kB_Flag) {
- b = ptr;
- ptr += 256;
- }
- return SkTableColorFilter::MakeARGB(a, r, g, b);
- }
- void SkTable_ColorFilter::getTableAsBitmap(SkBitmap* table) const {
- if (table) {
- if (nullptr == fBitmap) {
- SkBitmap* bmp = new SkBitmap;
- bmp->allocPixels(SkImageInfo::MakeA8(256, 4));
- uint8_t* bitmapPixels = bmp->getAddr8(0, 0);
- int offset = 0;
- static const unsigned kFlags[] = { kA_Flag, kR_Flag, kG_Flag, kB_Flag };
- for (int x = 0; x < 4; ++x) {
- if (!(fFlags & kFlags[x])) {
- memcpy(bitmapPixels, gIdentityTable, sizeof(gIdentityTable));
- } else {
- memcpy(bitmapPixels, fStorage + offset, 256);
- offset += 256;
- }
- bitmapPixels += 256;
- }
- bmp->setImmutable();
- fBitmap = bmp;
- }
- *table = *fBitmap;
- }
- }
- #if SK_SUPPORT_GPU
- #include "include/private/GrRecordingContext.h"
- #include "src/gpu/GrColorSpaceInfo.h"
- #include "src/gpu/GrFragmentProcessor.h"
- #include "src/gpu/GrRecordingContextPriv.h"
- #include "src/gpu/SkGr.h"
- #include "src/gpu/glsl/GrGLSLFragmentProcessor.h"
- #include "src/gpu/glsl/GrGLSLFragmentShaderBuilder.h"
- #include "src/gpu/glsl/GrGLSLProgramDataManager.h"
- #include "src/gpu/glsl/GrGLSLUniformHandler.h"
- class ColorTableEffect : public GrFragmentProcessor {
- public:
- static std::unique_ptr<GrFragmentProcessor> Make(GrRecordingContext* context,
- const SkBitmap& bitmap);
- ~ColorTableEffect() override {}
- const char* name() const override { return "ColorTableEffect"; }
- std::unique_ptr<GrFragmentProcessor> clone() const override {
- return std::unique_ptr<GrFragmentProcessor>(
- new ColorTableEffect(sk_ref_sp(fTextureSampler.proxy())));
- }
- private:
- GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
- void onGetGLSLProcessorKey(const GrShaderCaps&, GrProcessorKeyBuilder*) const override;
- bool onIsEqual(const GrFragmentProcessor&) const override { return true; }
- ColorTableEffect(sk_sp<GrTextureProxy> proxy)
- : INHERITED(kColorTableEffect_ClassID,
- kNone_OptimizationFlags) // Not bothering with table-specific optimizations.
- , fTextureSampler(std::move(proxy)) {
- this->setTextureSamplerCnt(1);
- }
- const TextureSampler& onTextureSampler(int) const override { return fTextureSampler; }
- GR_DECLARE_FRAGMENT_PROCESSOR_TEST
- TextureSampler fTextureSampler;
- typedef GrFragmentProcessor INHERITED;
- };
- class GLColorTableEffect : public GrGLSLFragmentProcessor {
- public:
- void emitCode(EmitArgs&) override;
- static void GenKey(const GrProcessor&, const GrShaderCaps&, GrProcessorKeyBuilder*) {}
- private:
- typedef GrGLSLFragmentProcessor INHERITED;
- };
- void GLColorTableEffect::emitCode(EmitArgs& args) {
- static const float kColorScaleFactor = 255.0f / 256.0f;
- static const float kColorOffsetFactor = 1.0f / 512.0f;
- GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
- if (nullptr == args.fInputColor) {
- // the input color is solid white (all ones).
- static const float kMaxValue = kColorScaleFactor + kColorOffsetFactor;
- fragBuilder->codeAppendf("\t\thalf4 coord = half4(%f, %f, %f, %f);\n",
- kMaxValue, kMaxValue, kMaxValue, kMaxValue);
- } else {
- fragBuilder->codeAppendf("\t\thalf nonZeroAlpha = max(%s.a, .0001);\n", args.fInputColor);
- fragBuilder->codeAppendf("\t\thalf4 coord = half4(%s.rgb / nonZeroAlpha, nonZeroAlpha);\n",
- args.fInputColor);
- fragBuilder->codeAppendf("\t\tcoord = coord * %f + half4(%f, %f, %f, %f);\n",
- kColorScaleFactor,
- kColorOffsetFactor, kColorOffsetFactor,
- kColorOffsetFactor, kColorOffsetFactor);
- }
- SkString coord;
- fragBuilder->codeAppendf("\t\t%s.a = ", args.fOutputColor);
- coord.printf("half2(coord.a, 0.125)");
- fragBuilder->appendTextureLookup(args.fTexSamplers[0], coord.c_str());
- fragBuilder->codeAppend(".a;\n");
- fragBuilder->codeAppendf("\t\t%s.r = ", args.fOutputColor);
- coord.printf("half2(coord.r, 0.375)");
- fragBuilder->appendTextureLookup(args.fTexSamplers[0], coord.c_str());
- fragBuilder->codeAppend(".a;\n");
- fragBuilder->codeAppendf("\t\t%s.g = ", args.fOutputColor);
- coord.printf("half2(coord.g, 0.625)");
- fragBuilder->appendTextureLookup(args.fTexSamplers[0], coord.c_str());
- fragBuilder->codeAppend(".a;\n");
- fragBuilder->codeAppendf("\t\t%s.b = ", args.fOutputColor);
- coord.printf("half2(coord.b, 0.875)");
- fragBuilder->appendTextureLookup(args.fTexSamplers[0], coord.c_str());
- fragBuilder->codeAppend(".a;\n");
- fragBuilder->codeAppendf("\t\t%s.rgb *= %s.a;\n", args.fOutputColor, args.fOutputColor);
- }
- ///////////////////////////////////////////////////////////////////////////////
- std::unique_ptr<GrFragmentProcessor> ColorTableEffect::Make(GrRecordingContext* context,
- const SkBitmap& bitmap) {
- SkASSERT(kPremul_SkAlphaType == bitmap.alphaType());
- SkASSERT(bitmap.isImmutable());
- if (kUnknown_GrPixelConfig == SkColorType2GrPixelConfig(bitmap.colorType())) {
- return nullptr;
- }
- sk_sp<SkImage> srcImage = SkImage::MakeFromBitmap(bitmap);
- if (!srcImage) {
- return nullptr;
- }
- sk_sp<GrTextureProxy> proxy = GrMakeCachedImageProxy(context->priv().proxyProvider(),
- std::move(srcImage));
- if (!proxy) {
- return nullptr;
- }
- return std::unique_ptr<GrFragmentProcessor>(new ColorTableEffect(std::move(proxy)));
- }
- void ColorTableEffect::onGetGLSLProcessorKey(const GrShaderCaps& caps,
- GrProcessorKeyBuilder* b) const {
- GLColorTableEffect::GenKey(*this, caps, b);
- }
- GrGLSLFragmentProcessor* ColorTableEffect::onCreateGLSLInstance() const {
- return new GLColorTableEffect;
- }
- ///////////////////////////////////////////////////////////////////////////////
- GR_DEFINE_FRAGMENT_PROCESSOR_TEST(ColorTableEffect);
- #if GR_TEST_UTILS
- #include "include/gpu/GrContext.h"
- std::unique_ptr<GrFragmentProcessor> ColorTableEffect::TestCreate(GrProcessorTestData* d) {
- int flags = 0;
- uint8_t luts[256][4];
- do {
- for (int i = 0; i < 4; ++i) {
- flags |= d->fRandom->nextBool() ? (1 << i): 0;
- }
- } while (!flags);
- for (int i = 0; i < 4; ++i) {
- if (flags & (1 << i)) {
- for (int j = 0; j < 256; ++j) {
- luts[j][i] = SkToU8(d->fRandom->nextBits(8));
- }
- }
- }
- auto filter(SkTableColorFilter::MakeARGB(
- (flags & (1 << 0)) ? luts[0] : nullptr,
- (flags & (1 << 1)) ? luts[1] : nullptr,
- (flags & (1 << 2)) ? luts[2] : nullptr,
- (flags & (1 << 3)) ? luts[3] : nullptr
- ));
- sk_sp<SkColorSpace> colorSpace = GrTest::TestColorSpace(d->fRandom);
- auto fp = filter->asFragmentProcessor(
- d->context(), GrColorSpaceInfo(GrColorType::kRGBA_8888, kUnknown_SkAlphaType,
- std::move(colorSpace)));
- SkASSERT(fp);
- return fp;
- }
- #endif
- std::unique_ptr<GrFragmentProcessor> SkTable_ColorFilter::asFragmentProcessor(
- GrRecordingContext* context, const GrColorSpaceInfo&) const {
- SkBitmap bitmap;
- this->getTableAsBitmap(&bitmap);
- return ColorTableEffect::Make(context, bitmap);
- }
- #endif // SK_SUPPORT_GPU
- ///////////////////////////////////////////////////////////////////////////////
- sk_sp<SkColorFilter> SkTableColorFilter::Make(const uint8_t table[256]) {
- return sk_make_sp<SkTable_ColorFilter>(table, table, table, table);
- }
- sk_sp<SkColorFilter> SkTableColorFilter::MakeARGB(const uint8_t tableA[256],
- const uint8_t tableR[256],
- const uint8_t tableG[256],
- const uint8_t tableB[256]) {
- return sk_make_sp<SkTable_ColorFilter>(tableA, tableR, tableG, tableB);
- }
- void SkTableColorFilter::RegisterFlattenables() { SK_REGISTER_FLATTENABLE(SkTable_ColorFilter); }
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