| /* |
| * 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 "GrPipelineBuilder.h" |
| #include "GrProcOptInfo.h" |
| #include "gl/GrGLCaps.h" |
| |
| GrXferProcessor::GrXferProcessor() |
| : fWillReadDstColor(false) |
| , fDstReadUsesMixedSamples(false) |
| , fReadsCoverage(true) |
| , fDstTextureOffset() { |
| } |
| |
| GrXferProcessor::GrXferProcessor(const DstTexture* dstTexture, |
| bool willReadDstColor, |
| bool hasMixedSamples) |
| : fWillReadDstColor(willReadDstColor) |
| , fDstReadUsesMixedSamples(willReadDstColor && hasMixedSamples) |
| , fReadsCoverage(true) |
| , fDstTextureOffset() { |
| if (dstTexture && dstTexture->texture()) { |
| SkASSERT(willReadDstColor); |
| fDstTexture.reset(dstTexture->texture()); |
| fDstTextureOffset = dstTexture->offset(); |
| this->addTextureAccess(&fDstTexture); |
| this->setWillReadFragmentPosition(); |
| } |
| } |
| |
| GrXferProcessor::OptFlags GrXferProcessor::getOptimizations(const GrProcOptInfo& colorPOI, |
| const GrProcOptInfo& coveragePOI, |
| bool doesStencilWrite, |
| GrColor* overrideColor, |
| const GrCaps& caps) { |
| GrXferProcessor::OptFlags flags = this->onGetOptimizations(colorPOI, |
| coveragePOI, |
| doesStencilWrite, |
| overrideColor, |
| caps); |
| |
| if (this->willReadDstColor()) { |
| // When performing a dst read we handle coverage in the base class. |
| SkASSERT(!(flags & GrXferProcessor::kIgnoreCoverage_OptFlag)); |
| if (coveragePOI.isSolidWhite()) { |
| flags |= GrXferProcessor::kIgnoreCoverage_OptFlag; |
| } |
| } |
| if (flags & GrXferProcessor::kIgnoreCoverage_OptFlag) { |
| fReadsCoverage = false; |
| } |
| return flags; |
| } |
| |
| 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::getGLProcessorKey(const GrGLSLCaps& caps, GrProcessorKeyBuilder* b) const { |
| uint32_t key = this->willReadDstColor() ? 0x1 : 0x0; |
| if (key) { |
| if (const GrTexture* dstTexture = this->getDstTexture()) { |
| key |= 0x2; |
| if (kTopLeft_GrSurfaceOrigin == dstTexture->origin()) { |
| key |= 0x4; |
| } |
| } |
| if (this->readsCoverage()) { |
| key |= 0x8; |
| } |
| if (this->dstReadUsesMixedSamples()) { |
| key |= 0x10; |
| } |
| } |
| b->add32(key); |
| this->onGetGLProcessorKey(caps, b); |
| } |
| |
| bool GrXferProcessor::willNeedXferBarrier(const GrRenderTarget* rt, |
| const GrCaps& caps, |
| GrXferBarrierType* outBarrierType) const { |
| if (static_cast<const GrSurface*>(rt) == this->getDstTexture()) { |
| // Texture barriers are required when a shader reads and renders to the same texture. |
| SkASSERT(rt); |
| SkASSERT(caps.textureBarrierSupport()); |
| *outBarrierType = kTexture_GrXferBarrierType; |
| return true; |
| } |
| return this->onWillNeedXferBarrier(rt, caps, outBarrierType); |
| } |
| |
| #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 |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| GrXferProcessor* GrXPFactory::createXferProcessor(const GrProcOptInfo& colorPOI, |
| const GrProcOptInfo& coveragePOI, |
| bool hasMixedSamples, |
| const DstTexture* dstTexture, |
| const GrCaps& caps) const { |
| #ifdef SK_DEBUG |
| if (this->willReadDstColor(caps, colorPOI, coveragePOI, hasMixedSamples)) { |
| if (!caps.shaderCaps()->dstReadInShaderSupport()) { |
| SkASSERT(dstTexture && dstTexture->texture()); |
| } else { |
| SkASSERT(!dstTexture || !dstTexture->texture()); |
| } |
| } else { |
| SkASSERT(!dstTexture || !dstTexture->texture()); |
| } |
| SkASSERT(!hasMixedSamples || caps.shaderCaps()->dualSourceBlendingSupport()); |
| #endif |
| return this->onCreateXferProcessor(caps, colorPOI, coveragePOI, hasMixedSamples, dstTexture); |
| } |
| |
| bool GrXPFactory::willNeedDstTexture(const GrCaps& caps, |
| const GrProcOptInfo& colorPOI, |
| const GrProcOptInfo& coveragePOI, |
| bool hasMixedSamples) const { |
| return (this->willReadDstColor(caps, colorPOI, coveragePOI, hasMixedSamples) && |
| !caps.shaderCaps()->dstReadInShaderSupport()); |
| } |