| /* | |
| * Copyright 2012 Google Inc. | |
| * | |
| * Use of this source code is governed by a BSD-style license that can be | |
| * found in the LICENSE file. | |
| */ | |
| #include "GrConfigConversionEffect.h" | |
| #include "GrContext.h" | |
| #include "GrDrawContext.h" | |
| #include "GrInvariantOutput.h" | |
| #include "GrSimpleTextureEffect.h" | |
| #include "SkMatrix.h" | |
| #include "glsl/GrGLSLFragmentProcessor.h" | |
| #include "glsl/GrGLSLFragmentShaderBuilder.h" | |
| class GrGLConfigConversionEffect : public GrGLSLFragmentProcessor { | |
| public: | |
| void emitCode(EmitArgs& args) override { | |
| const GrConfigConversionEffect& cce = args.fFp.cast<GrConfigConversionEffect>(); | |
| const GrSwizzle& swizzle = cce.swizzle(); | |
| GrConfigConversionEffect::PMConversion pmConversion = cce.pmConversion(); | |
| // Using highp for GLES here in order to avoid some precision issues on specific GPUs. | |
| GrGLSLShaderVar tmpVar("tmpColor", kVec4f_GrSLType, 0, kHigh_GrSLPrecision); | |
| SkString tmpDecl; | |
| tmpVar.appendDecl(args.fGLSLCaps, &tmpDecl); | |
| GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder; | |
| fragBuilder->codeAppendf("%s;", tmpDecl.c_str()); | |
| fragBuilder->codeAppendf("%s = ", tmpVar.c_str()); | |
| fragBuilder->appendTextureLookup(args.fTexSamplers[0], args.fCoords[0].c_str(), | |
| args.fCoords[0].getType()); | |
| fragBuilder->codeAppend(";"); | |
| if (GrConfigConversionEffect::kNone_PMConversion == pmConversion) { | |
| SkASSERT(GrSwizzle::RGBA() != swizzle); | |
| fragBuilder->codeAppendf("%s = %s.%s;", args.fOutputColor, tmpVar.c_str(), | |
| swizzle.c_str()); | |
| } else { | |
| switch (pmConversion) { | |
| case GrConfigConversionEffect::kMulByAlpha_RoundUp_PMConversion: | |
| fragBuilder->codeAppendf( | |
| "%s = vec4(ceil(%s.rgb * %s.a * 255.0) / 255.0, %s.a);", | |
| tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str()); | |
| break; | |
| case GrConfigConversionEffect::kMulByAlpha_RoundDown_PMConversion: | |
| // Add a compensation(0.001) here to avoid the side effect of the floor operation. | |
| // In Intel GPUs, the integer value converted from floor(%s.r * 255.0) / 255.0 | |
| // is less than the integer value converted from %s.r by 1 when the %s.r is | |
| // converted from the integer value 2^n, such as 1, 2, 4, 8, etc. | |
| fragBuilder->codeAppendf( | |
| "%s = vec4(floor(%s.rgb * %s.a * 255.0 + 0.001) / 255.0, %s.a);", | |
| tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str()); | |
| break; | |
| case GrConfigConversionEffect::kDivByAlpha_RoundUp_PMConversion: | |
| fragBuilder->codeAppendf( | |
| "%s = %s.a <= 0.0 ? vec4(0,0,0,0) : vec4(ceil(%s.rgb / %s.a * 255.0) / 255.0, %s.a);", | |
| tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str(), | |
| tmpVar.c_str()); | |
| break; | |
| case GrConfigConversionEffect::kDivByAlpha_RoundDown_PMConversion: | |
| fragBuilder->codeAppendf( | |
| "%s = %s.a <= 0.0 ? vec4(0,0,0,0) : vec4(floor(%s.rgb / %s.a * 255.0) / 255.0, %s.a);", | |
| tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str(), | |
| tmpVar.c_str()); | |
| break; | |
| default: | |
| SkFAIL("Unknown conversion op."); | |
| break; | |
| } | |
| fragBuilder->codeAppendf("%s = %s.%s;", args.fOutputColor, tmpVar.c_str(), | |
| swizzle.c_str()); | |
| } | |
| SkString modulate; | |
| GrGLSLMulVarBy4f(&modulate, args.fOutputColor, args.fInputColor); | |
| fragBuilder->codeAppend(modulate.c_str()); | |
| } | |
| static inline void GenKey(const GrProcessor& processor, const GrGLSLCaps&, | |
| GrProcessorKeyBuilder* b) { | |
| const GrConfigConversionEffect& cce = processor.cast<GrConfigConversionEffect>(); | |
| uint32_t key = (cce.swizzle().asKey()) | (cce.pmConversion() << 16); | |
| b->add32(key); | |
| } | |
| private: | |
| typedef GrGLSLFragmentProcessor INHERITED; | |
| }; | |
| /////////////////////////////////////////////////////////////////////////////// | |
| GrConfigConversionEffect::GrConfigConversionEffect(GrTexture* texture, | |
| const GrSwizzle& swizzle, | |
| PMConversion pmConversion, | |
| const SkMatrix& matrix) | |
| : INHERITED(texture, nullptr, matrix) | |
| , fSwizzle(swizzle) | |
| , fPMConversion(pmConversion) { | |
| this->initClassID<GrConfigConversionEffect>(); | |
| // We expect to get here with non-BGRA/RGBA only if we're doing not doing a premul/unpremul | |
| // conversion. | |
| SkASSERT((kRGBA_8888_GrPixelConfig == texture->config() || | |
| kBGRA_8888_GrPixelConfig == texture->config()) || | |
| kNone_PMConversion == pmConversion); | |
| // Why did we pollute our texture cache instead of using a GrSingleTextureEffect? | |
| SkASSERT(swizzle != GrSwizzle::RGBA() || kNone_PMConversion != pmConversion); | |
| } | |
| bool GrConfigConversionEffect::onIsEqual(const GrFragmentProcessor& s) const { | |
| const GrConfigConversionEffect& other = s.cast<GrConfigConversionEffect>(); | |
| return other.fSwizzle == fSwizzle && | |
| other.fPMConversion == fPMConversion; | |
| } | |
| void GrConfigConversionEffect::onComputeInvariantOutput(GrInvariantOutput* inout) const { | |
| this->updateInvariantOutputForModulation(inout); | |
| } | |
| /////////////////////////////////////////////////////////////////////////////// | |
| GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrConfigConversionEffect); | |
| #if !defined(__clang__) && _MSC_FULL_VER >= 190024213 | |
| // Work around VS 2015 Update 3 optimizer bug that causes internal compiler error | |
| //https://connect.microsoft.com/VisualStudio/feedback/details/3100520/internal-compiler-error | |
| #pragma optimize("t", off) | |
| #endif | |
| sk_sp<GrFragmentProcessor> GrConfigConversionEffect::TestCreate(GrProcessorTestData* d) { | |
| PMConversion pmConv = static_cast<PMConversion>(d->fRandom->nextULessThan(kPMConversionCnt)); | |
| GrSwizzle swizzle; | |
| do { | |
| swizzle = GrSwizzle::CreateRandom(d->fRandom); | |
| } while (pmConv == kNone_PMConversion && swizzle == GrSwizzle::RGBA()); | |
| return sk_sp<GrFragmentProcessor>( | |
| new GrConfigConversionEffect(d->fTextures[GrProcessorUnitTest::kSkiaPMTextureIdx], | |
| swizzle, pmConv, GrTest::TestMatrix(d->fRandom))); | |
| } | |
| #if !defined(__clang__) && _MSC_FULL_VER >= 190024213 | |
| // Restore optimization settings. | |
| #pragma optimize("", on) | |
| #endif | |
| /////////////////////////////////////////////////////////////////////////////// | |
| void GrConfigConversionEffect::onGetGLSLProcessorKey(const GrGLSLCaps& caps, | |
| GrProcessorKeyBuilder* b) const { | |
| GrGLConfigConversionEffect::GenKey(*this, caps, b); | |
| } | |
| GrGLSLFragmentProcessor* GrConfigConversionEffect::onCreateGLSLInstance() const { | |
| return new GrGLConfigConversionEffect(); | |
| } | |
| void GrConfigConversionEffect::TestForPreservingPMConversions(GrContext* context, | |
| PMConversion* pmToUPMRule, | |
| PMConversion* upmToPMRule) { | |
| *pmToUPMRule = kNone_PMConversion; | |
| *upmToPMRule = kNone_PMConversion; | |
| static constexpr int kSize = 256; | |
| static constexpr GrPixelConfig kConfig = kRGBA_8888_GrPixelConfig; | |
| SkAutoTMalloc<uint32_t> data(kSize * kSize * 3); | |
| uint32_t* srcData = data.get(); | |
| uint32_t* firstRead = data.get() + kSize * kSize; | |
| uint32_t* secondRead = data.get() + 2 * kSize * kSize; | |
| // Fill with every possible premultiplied A, color channel value. There will be 256-y duplicate | |
| // values in row y. We set r,g, and b to the same value since they are handled identically. | |
| for (int y = 0; y < kSize; ++y) { | |
| for (int x = 0; x < kSize; ++x) { | |
| uint8_t* color = reinterpret_cast<uint8_t*>(&srcData[kSize*y + x]); | |
| color[3] = y; | |
| color[2] = SkTMin(x, y); | |
| color[1] = SkTMin(x, y); | |
| color[0] = SkTMin(x, y); | |
| } | |
| } | |
| sk_sp<GrDrawContext> readDC(context->makeDrawContext(SkBackingFit::kExact, kSize, kSize, | |
| kConfig, nullptr)); | |
| sk_sp<GrDrawContext> tempDC(context->makeDrawContext(SkBackingFit::kExact, kSize, kSize, | |
| kConfig, nullptr)); | |
| if (!readDC || !tempDC) { | |
| return; | |
| } | |
| GrSurfaceDesc desc; | |
| desc.fWidth = kSize; | |
| desc.fHeight = kSize; | |
| desc.fConfig = kConfig; | |
| SkAutoTUnref<GrTexture> dataTex(context->textureProvider()->createTexture( | |
| desc, SkBudgeted::kYes, data, 0)); | |
| if (!dataTex.get()) { | |
| return; | |
| } | |
| static const PMConversion kConversionRules[][2] = { | |
| {kDivByAlpha_RoundDown_PMConversion, kMulByAlpha_RoundUp_PMConversion}, | |
| {kDivByAlpha_RoundUp_PMConversion, kMulByAlpha_RoundDown_PMConversion}, | |
| }; | |
| bool failed = true; | |
| for (size_t i = 0; i < SK_ARRAY_COUNT(kConversionRules) && failed; ++i) { | |
| *pmToUPMRule = kConversionRules[i][0]; | |
| *upmToPMRule = kConversionRules[i][1]; | |
| static const SkRect kDstRect = SkRect::MakeIWH(kSize, kSize); | |
| static const SkRect kSrcRect = SkRect::MakeIWH(1, 1); | |
| // We do a PM->UPM draw from dataTex to readTex and read the data. Then we do a UPM->PM draw | |
| // from readTex to tempTex followed by a PM->UPM draw to readTex and finally read the data. | |
| // We then verify that two reads produced the same values. | |
| GrPaint paint1; | |
| GrPaint paint2; | |
| GrPaint paint3; | |
| sk_sp<GrFragmentProcessor> pmToUPM1(new GrConfigConversionEffect( | |
| dataTex, GrSwizzle::RGBA(), *pmToUPMRule, SkMatrix::I())); | |
| sk_sp<GrFragmentProcessor> upmToPM(new GrConfigConversionEffect( | |
| readDC->asTexture().get(), GrSwizzle::RGBA(), *upmToPMRule, SkMatrix::I())); | |
| sk_sp<GrFragmentProcessor> pmToUPM2(new GrConfigConversionEffect( | |
| tempDC->asTexture().get(), GrSwizzle::RGBA(), *pmToUPMRule, SkMatrix::I())); | |
| paint1.addColorFragmentProcessor(std::move(pmToUPM1)); | |
| paint1.setPorterDuffXPFactory(SkXfermode::kSrc_Mode); | |
| readDC->fillRectToRect(GrNoClip(), paint1, SkMatrix::I(), kDstRect, kSrcRect); | |
| readDC->asTexture()->readPixels(0, 0, kSize, kSize, kConfig, firstRead); | |
| paint2.addColorFragmentProcessor(std::move(upmToPM)); | |
| paint2.setPorterDuffXPFactory(SkXfermode::kSrc_Mode); | |
| tempDC->fillRectToRect(GrNoClip(), paint2, SkMatrix::I(), kDstRect, kSrcRect); | |
| paint3.addColorFragmentProcessor(std::move(pmToUPM2)); | |
| paint3.setPorterDuffXPFactory(SkXfermode::kSrc_Mode); | |
| readDC->fillRectToRect(GrNoClip(), paint3, SkMatrix::I(), kDstRect, kSrcRect); | |
| readDC->asTexture()->readPixels(0, 0, kSize, kSize, kConfig, secondRead); | |
| failed = false; | |
| for (int y = 0; y < kSize && !failed; ++y) { | |
| for (int x = 0; x <= y; ++x) { | |
| if (firstRead[kSize * y + x] != secondRead[kSize * y + x]) { | |
| failed = true; | |
| break; | |
| } | |
| } | |
| } | |
| } | |
| if (failed) { | |
| *pmToUPMRule = kNone_PMConversion; | |
| *upmToPMRule = kNone_PMConversion; | |
| } | |
| } | |
| sk_sp<GrFragmentProcessor> GrConfigConversionEffect::Make(GrTexture* texture, | |
| const GrSwizzle& swizzle, | |
| PMConversion pmConversion, | |
| const SkMatrix& matrix) { | |
| if (swizzle == GrSwizzle::RGBA() && kNone_PMConversion == pmConversion) { | |
| // If we returned a GrConfigConversionEffect that was equivalent to a GrSimpleTextureEffect | |
| // then we may pollute our texture cache with redundant shaders. So in the case that no | |
| // conversions were requested we instead return a GrSimpleTextureEffect. | |
| return GrSimpleTextureEffect::Make(texture, nullptr, matrix); | |
| } else { | |
| if (kRGBA_8888_GrPixelConfig != texture->config() && | |
| kBGRA_8888_GrPixelConfig != texture->config() && | |
| kNone_PMConversion != pmConversion) { | |
| // The PM conversions assume colors are 0..255 | |
| return nullptr; | |
| } | |
| return sk_sp<GrFragmentProcessor>( | |
| new GrConfigConversionEffect(texture, swizzle, pmConversion, matrix)); | |
| } | |
| } |