Brian Salomon | 6d4b65e | 2017-05-03 17:06:09 -0400 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2017 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 | #ifndef GrSimpleMeshDrawOpHelper_DEFINED |
| 9 | #define GrSimpleMeshDrawOpHelper_DEFINED |
| 10 | |
| 11 | #include "GrAppliedClip.h" |
| 12 | #include "GrOpFlushState.h" |
| 13 | #include "GrPipeline.h" |
| 14 | #include "GrProcessorSet.h" |
Brian Salomon | a4677b5 | 2017-05-04 12:39:56 -0400 | [diff] [blame^] | 15 | #include "GrRect.h" |
Brian Salomon | 6d4b65e | 2017-05-03 17:06:09 -0400 | [diff] [blame] | 16 | #include "GrUserStencilSettings.h" |
| 17 | |
| 18 | /** |
| 19 | * This class can be used to help implement simple mesh draw ops. It reduces the amount of |
| 20 | * boilerplate code to type and also provides a mechanism for optionally allocating space for a |
| 21 | * GrProcessorSet based on a GrPaint. It is intended to be used by ops that construct a single |
| 22 | * GrPipeline for a uniform primitive color and a GrPaint. |
| 23 | */ |
| 24 | class GrSimpleMeshDrawOpHelper { |
| 25 | public: |
| 26 | struct MakeArgs; |
| 27 | |
| 28 | /** |
| 29 | * This can be used by a Op class to perform allocation and initialization such that a |
| 30 | * GrProcessorSet (if required) is allocated at the same time as the Op instance. It requires |
| 31 | * that Op implements a constructor of the form: |
| 32 | * Op(MakeArgs, GrColor, OpArgs...) |
| 33 | * which is public or made accessible via 'friend'. |
| 34 | */ |
| 35 | template <typename Op, typename... OpArgs> |
| 36 | static std::unique_ptr<GrDrawOp> FactoryHelper(GrPaint&& paint, OpArgs... opArgs); |
| 37 | |
| 38 | GrSimpleMeshDrawOpHelper(const MakeArgs& args, GrAAType aaType, |
| 39 | GrUserStencilSettings* stencilSettings = nullptr) |
| 40 | : fProcessors(args.fProcessorSet) |
| 41 | , fPipelineFlags(args.fSRGBFlags) |
Brian Salomon | a4677b5 | 2017-05-04 12:39:56 -0400 | [diff] [blame^] | 42 | , fAAType((int)aaType) |
| 43 | , fRequiresDstTexture(false) { |
Brian Salomon | 6d4b65e | 2017-05-03 17:06:09 -0400 | [diff] [blame] | 44 | SkASSERT(!stencilSettings); |
| 45 | if (GrAATypeIsHW(aaType)) { |
| 46 | fPipelineFlags |= GrPipeline::kHWAntialias_Flag; |
| 47 | } |
| 48 | } |
| 49 | |
| 50 | ~GrSimpleMeshDrawOpHelper() { |
| 51 | if (fProcessors) { |
| 52 | fProcessors->~GrProcessorSet(); |
| 53 | } |
| 54 | } |
| 55 | |
| 56 | GrSimpleMeshDrawOpHelper() = delete; |
| 57 | GrSimpleMeshDrawOpHelper(const GrSimpleMeshDrawOpHelper&) = delete; |
| 58 | GrSimpleMeshDrawOpHelper& operator=(const GrSimpleMeshDrawOpHelper&) = delete; |
| 59 | |
| 60 | GrDrawOp::FixedFunctionFlags fixedFunctionFlags() const { |
| 61 | return GrAATypeIsHW((this->aaType())) ? GrDrawOp::FixedFunctionFlags::kUsesHWAA |
| 62 | : GrDrawOp::FixedFunctionFlags::kNone; |
| 63 | } |
| 64 | |
Brian Salomon | a4677b5 | 2017-05-04 12:39:56 -0400 | [diff] [blame^] | 65 | bool isCompatible(const GrSimpleMeshDrawOpHelper& that, const GrCaps& caps, |
| 66 | const SkRect& aBounds, const SkRect& bBounds) const { |
Brian Salomon | 6d4b65e | 2017-05-03 17:06:09 -0400 | [diff] [blame] | 67 | if (SkToBool(fProcessors) != SkToBool(that.fProcessors)) { |
| 68 | return false; |
| 69 | } |
Brian Salomon | a4677b5 | 2017-05-04 12:39:56 -0400 | [diff] [blame^] | 70 | if (fProcessors) { |
| 71 | if (*fProcessors != *that.fProcessors) { |
| 72 | return false; |
| 73 | } |
| 74 | if (fRequiresDstTexture || (fProcessors->xferProcessor() && |
| 75 | fProcessors->xferProcessor()->xferBarrierType(caps))) { |
| 76 | if (GrRectsTouchOrOverlap(aBounds, bBounds)) { |
| 77 | return false; |
| 78 | } |
| 79 | } |
Brian Salomon | 6d4b65e | 2017-05-03 17:06:09 -0400 | [diff] [blame] | 80 | } |
| 81 | return fPipelineFlags == that.fPipelineFlags && fAAType == that.fAAType; |
| 82 | } |
| 83 | |
| 84 | bool xpRequiresDstTexture(const GrCaps& caps, const GrAppliedClip* clip, |
| 85 | GrProcessorAnalysisCoverage geometryCoverage, GrColor* color) { |
| 86 | if (fProcessors) { |
| 87 | GrProcessorAnalysisCoverage coverage = geometryCoverage; |
| 88 | if (GrProcessorAnalysisCoverage::kNone == coverage) { |
| 89 | coverage = clip->clipCoverageFragmentProcessor() |
| 90 | ? GrProcessorAnalysisCoverage::kSingleChannel |
| 91 | : GrProcessorAnalysisCoverage::kNone; |
| 92 | } |
| 93 | bool isMixedSamples = this->aaType() == GrAAType::kMixedSamples; |
| 94 | GrProcessorSet::Analysis analysis = |
| 95 | fProcessors->finalize(*color, coverage, clip, isMixedSamples, caps, color); |
Brian Salomon | a4677b5 | 2017-05-04 12:39:56 -0400 | [diff] [blame^] | 96 | fRequiresDstTexture = analysis.requiresDstTexture(); |
Brian Salomon | 6d4b65e | 2017-05-03 17:06:09 -0400 | [diff] [blame] | 97 | return analysis.requiresDstTexture(); |
| 98 | } else { |
| 99 | return GrProcessorSet::EmptySetAnalysis().requiresDstTexture(); |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | GrPipeline* makePipeline(GrMeshDrawOp::Target* target) const { |
| 104 | return target->allocPipeline(this->pipelineInitArgs(target)); |
| 105 | } |
| 106 | |
| 107 | struct MakeArgs { |
| 108 | private: |
| 109 | MakeArgs() = default; |
| 110 | |
| 111 | GrProcessorSet* fProcessorSet; |
| 112 | uint32_t fSRGBFlags; |
| 113 | |
| 114 | friend class GrSimpleMeshDrawOpHelper; |
| 115 | }; |
| 116 | |
| 117 | protected: |
| 118 | GrAAType aaType() const { return static_cast<GrAAType>(fAAType); } |
| 119 | uint32_t pipelineFlags() const { return fPipelineFlags; } |
| 120 | const GrProcessorSet& processors() const { |
| 121 | return fProcessors ? *fProcessors : GrProcessorSet::EmptySet(); |
| 122 | } |
| 123 | |
| 124 | GrPipeline::InitArgs pipelineInitArgs(GrMeshDrawOp::Target* target) const { |
| 125 | GrPipeline::InitArgs args; |
| 126 | args.fFlags = this->pipelineFlags(); |
| 127 | args.fProcessors = &this->processors(); |
| 128 | args.fRenderTarget = target->renderTarget(); |
| 129 | args.fAppliedClip = target->clip(); |
| 130 | args.fDstTexture = target->dstTexture(); |
| 131 | args.fCaps = &target->caps(); |
| 132 | return args; |
| 133 | } |
| 134 | |
| 135 | private: |
| 136 | GrProcessorSet* fProcessors; |
| 137 | unsigned fPipelineFlags : 8; |
| 138 | unsigned fAAType : 2; |
Brian Salomon | a4677b5 | 2017-05-04 12:39:56 -0400 | [diff] [blame^] | 139 | unsigned fRequiresDstTexture : 1; |
Brian Salomon | 6d4b65e | 2017-05-03 17:06:09 -0400 | [diff] [blame] | 140 | }; |
| 141 | |
| 142 | /** |
| 143 | * This class extends GrSimpleMeshDrawOpHelper to support an optional GrUserStencilSettings. This |
| 144 | * uses private inheritance because it non-virtually overrides methods in the base class and should |
| 145 | * never be used with a GrSimpleMeshDrawOpHelper pointer or reference. |
| 146 | */ |
| 147 | class GrSimpleMeshDrawOpHelperWithStencil : private GrSimpleMeshDrawOpHelper { |
| 148 | public: |
| 149 | using MakeArgs = GrSimpleMeshDrawOpHelper::MakeArgs; |
| 150 | |
| 151 | // using declarations can't be templated, so this is a pass through function instead. |
| 152 | template <typename Op, typename... OpArgs> |
| 153 | static std::unique_ptr<GrDrawOp> FactoryHelper(GrPaint&& paint, OpArgs... opArgs) { |
| 154 | return GrSimpleMeshDrawOpHelper::FactoryHelper<Op, OpArgs...>( |
| 155 | std::move(paint), std::forward<OpArgs>(opArgs)...); |
| 156 | } |
| 157 | |
| 158 | GrSimpleMeshDrawOpHelperWithStencil(const MakeArgs& args, GrAAType aaType, |
| 159 | const GrUserStencilSettings* stencilSettings) |
| 160 | : INHERITED(args, aaType) |
| 161 | , fStencilSettings(stencilSettings ? stencilSettings |
| 162 | : &GrUserStencilSettings::kUnused) {} |
| 163 | |
| 164 | GrDrawOp::FixedFunctionFlags fixedFunctionFlags() const { |
| 165 | GrDrawOp::FixedFunctionFlags flags = INHERITED::fixedFunctionFlags(); |
| 166 | if (fStencilSettings != &GrUserStencilSettings::kUnused) { |
| 167 | flags |= GrDrawOp::FixedFunctionFlags::kUsesStencil; |
| 168 | } |
| 169 | return flags; |
| 170 | } |
| 171 | |
| 172 | using GrSimpleMeshDrawOpHelper::xpRequiresDstTexture; |
| 173 | |
Brian Salomon | a4677b5 | 2017-05-04 12:39:56 -0400 | [diff] [blame^] | 174 | bool isCompatible(const GrSimpleMeshDrawOpHelperWithStencil& that, const GrCaps& caps, |
| 175 | const SkRect& aBounds, const SkRect& bBounds) const { |
| 176 | return INHERITED::isCompatible(that, caps, aBounds, bBounds) && |
| 177 | fStencilSettings == that.fStencilSettings; |
Brian Salomon | 6d4b65e | 2017-05-03 17:06:09 -0400 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | GrPipeline* makePipeline(GrMeshDrawOp::Target* target) const { |
| 181 | auto args = INHERITED::pipelineInitArgs(target); |
| 182 | args.fUserStencil = fStencilSettings; |
| 183 | return target->allocPipeline(args); |
| 184 | } |
| 185 | |
| 186 | private: |
| 187 | const GrUserStencilSettings* fStencilSettings; |
| 188 | typedef GrSimpleMeshDrawOpHelper INHERITED; |
| 189 | }; |
| 190 | |
| 191 | template <typename Op, typename... OpArgs> |
| 192 | std::unique_ptr<GrDrawOp> GrSimpleMeshDrawOpHelper::FactoryHelper(GrPaint&& paint, |
| 193 | OpArgs... opArgs) { |
| 194 | MakeArgs makeArgs; |
| 195 | makeArgs.fSRGBFlags = GrPipeline::SRGBFlagsFromPaint(paint); |
| 196 | GrColor color = paint.getColor(); |
| 197 | if (paint.isTrivial()) { |
| 198 | makeArgs.fProcessorSet = nullptr; |
| 199 | return std::unique_ptr<GrDrawOp>(new Op(makeArgs, color, std::forward<OpArgs>(opArgs)...)); |
| 200 | } else { |
| 201 | char* mem = (char*)GrOp::operator new(sizeof(Op) + sizeof(GrProcessorSet)); |
| 202 | char* setMem = mem + sizeof(Op); |
| 203 | makeArgs.fProcessorSet = new (setMem) GrProcessorSet(std::move(paint)); |
| 204 | return std::unique_ptr<GrDrawOp>( |
| 205 | new (mem) Op(makeArgs, color, std::forward<OpArgs>(opArgs)...)); |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | #endif |