| /* |
| * 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 "GrXferProcessor.h" |
| #include "GrPipeline.h" |
| #include "gl/GrGLCaps.h" |
| |
| GrXferProcessor::GrXferProcessor() |
| : fWillReadDstColor(false) |
| , fDstReadUsesMixedSamples(false) |
| , fIsLCD(false) {} |
| |
| GrXferProcessor::GrXferProcessor(bool willReadDstColor, bool hasMixedSamples, |
| GrProcessorAnalysisCoverage coverage) |
| : fWillReadDstColor(willReadDstColor) |
| , fDstReadUsesMixedSamples(willReadDstColor && hasMixedSamples) |
| , fIsLCD(GrProcessorAnalysisCoverage::kLCD == coverage) {} |
| |
| bool GrXferProcessor::hasSecondaryOutput() const { |
| if (!this->willReadDstColor()) { |
| return this->onHasSecondaryOutput(); |
| } |
| return this->dstReadUsesMixedSamples(); |
| } |
| |
| void GrXferProcessor::getBlendInfo(BlendInfo* blendInfo) const { |
| blendInfo->reset(); |
| if (!this->willReadDstColor()) { |
| this->onGetBlendInfo(blendInfo); |
| } else if (this->dstReadUsesMixedSamples()) { |
| blendInfo->fDstBlend = kIS2A_GrBlendCoeff; |
| } |
| } |
| |
| void GrXferProcessor::getGLSLProcessorKey(const GrShaderCaps& caps, GrProcessorKeyBuilder* b, |
| const GrSurfaceOrigin* originIfDstTexture) const { |
| uint32_t key = this->willReadDstColor() ? 0x1 : 0x0; |
| if (key) { |
| if (originIfDstTexture) { |
| key |= 0x2; |
| if (kTopLeft_GrSurfaceOrigin == *originIfDstTexture) { |
| key |= 0x4; |
| } |
| } |
| if (this->dstReadUsesMixedSamples()) { |
| key |= 0x8; |
| } |
| } |
| if (fIsLCD) { |
| key |= 0x10; |
| } |
| b->add32(key); |
| this->onGetGLSLProcessorKey(caps, b); |
| } |
| |
| #ifdef SK_DEBUG |
| static const char* equation_string(GrBlendEquation eq) { |
| switch (eq) { |
| case kAdd_GrBlendEquation: |
| return "add"; |
| case kSubtract_GrBlendEquation: |
| return "subtract"; |
| case kReverseSubtract_GrBlendEquation: |
| return "reverse_subtract"; |
| case kScreen_GrBlendEquation: |
| return "screen"; |
| case kOverlay_GrBlendEquation: |
| return "overlay"; |
| case kDarken_GrBlendEquation: |
| return "darken"; |
| case kLighten_GrBlendEquation: |
| return "lighten"; |
| case kColorDodge_GrBlendEquation: |
| return "color_dodge"; |
| case kColorBurn_GrBlendEquation: |
| return "color_burn"; |
| case kHardLight_GrBlendEquation: |
| return "hard_light"; |
| case kSoftLight_GrBlendEquation: |
| return "soft_light"; |
| case kDifference_GrBlendEquation: |
| return "difference"; |
| case kExclusion_GrBlendEquation: |
| return "exclusion"; |
| case kMultiply_GrBlendEquation: |
| return "multiply"; |
| case kHSLHue_GrBlendEquation: |
| return "hsl_hue"; |
| case kHSLSaturation_GrBlendEquation: |
| return "hsl_saturation"; |
| case kHSLColor_GrBlendEquation: |
| return "hsl_color"; |
| case kHSLLuminosity_GrBlendEquation: |
| return "hsl_luminosity"; |
| }; |
| return ""; |
| } |
| |
| static const char* coeff_string(GrBlendCoeff coeff) { |
| switch (coeff) { |
| case kZero_GrBlendCoeff: |
| return "zero"; |
| case kOne_GrBlendCoeff: |
| return "one"; |
| case kSC_GrBlendCoeff: |
| return "src_color"; |
| case kISC_GrBlendCoeff: |
| return "inv_src_color"; |
| case kDC_GrBlendCoeff: |
| return "dst_color"; |
| case kIDC_GrBlendCoeff: |
| return "inv_dst_color"; |
| case kSA_GrBlendCoeff: |
| return "src_alpha"; |
| case kISA_GrBlendCoeff: |
| return "inv_src_alpha"; |
| case kDA_GrBlendCoeff: |
| return "dst_alpha"; |
| case kIDA_GrBlendCoeff: |
| return "inv_dst_alpha"; |
| case kConstC_GrBlendCoeff: |
| return "const_color"; |
| case kIConstC_GrBlendCoeff: |
| return "inv_const_color"; |
| case kConstA_GrBlendCoeff: |
| return "const_alpha"; |
| case kIConstA_GrBlendCoeff: |
| return "inv_const_alpha"; |
| case kS2C_GrBlendCoeff: |
| return "src2_color"; |
| case kIS2C_GrBlendCoeff: |
| return "inv_src2_color"; |
| case kS2A_GrBlendCoeff: |
| return "src2_alpha"; |
| case kIS2A_GrBlendCoeff: |
| return "inv_src2_alpha"; |
| } |
| return ""; |
| } |
| |
| SkString GrXferProcessor::BlendInfo::dump() const { |
| SkString out; |
| out.printf("write_color(%d) equation(%s) src_coeff(%s) dst_coeff:(%s) const(0x%08x)", |
| fWriteColor, equation_string(fEquation), coeff_string(fSrcBlend), |
| coeff_string(fDstBlend), fBlendConstant); |
| return out; |
| } |
| #endif |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrXPFactory::AnalysisProperties GrXPFactory::GetAnalysisProperties( |
| const GrXPFactory* factory, |
| const GrProcessorAnalysisColor& color, |
| const GrProcessorAnalysisCoverage& coverage, |
| const GrCaps& caps) { |
| AnalysisProperties result; |
| if (factory) { |
| result = factory->analysisProperties(color, coverage, caps); |
| } else { |
| result = GrPorterDuffXPFactory::SrcOverAnalysisProperties(color, coverage, caps); |
| } |
| SkASSERT(!(result & AnalysisProperties::kRequiresDstTexture)); |
| if ((result & AnalysisProperties::kReadsDstInShader) && |
| !caps.shaderCaps()->dstReadInShaderSupport()) { |
| result |= AnalysisProperties::kRequiresDstTexture; |
| if (caps.textureBarrierSupport()) { |
| result |= AnalysisProperties::kRequiresBarrierBetweenOverlappingDraws; |
| } |
| } |
| return result; |
| } |
| |
| sk_sp<const GrXferProcessor> GrXPFactory::MakeXferProcessor(const GrXPFactory* factory, |
| const GrProcessorAnalysisColor& color, |
| GrProcessorAnalysisCoverage coverage, |
| bool hasMixedSamples, |
| const GrCaps& caps) { |
| SkASSERT(!hasMixedSamples || caps.shaderCaps()->dualSourceBlendingSupport()); |
| if (factory) { |
| return factory->makeXferProcessor(color, coverage, hasMixedSamples, caps); |
| } else { |
| return GrPorterDuffXPFactory::MakeSrcOverXferProcessor(color, coverage, hasMixedSamples, |
| caps); |
| } |
| } |
