| /* |
| * Copyright 2018 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrQuadPerEdgeAA_DEFINED |
| #define GrQuadPerEdgeAA_DEFINED |
| |
| #include "GrColor.h" |
| #include "GrGeometryProcessor.h" |
| #include "GrMeshDrawOp.h" |
| #include "GrQuad.h" |
| #include "GrSamplerState.h" |
| #include "GrTypesPriv.h" |
| #include "SkPoint.h" |
| #include "SkPoint3.h" |
| |
| class GrColorSpaceXform; |
| class GrShaderCaps; |
| |
| namespace GrQuadPerEdgeAA { |
| |
| enum class Domain : bool { kNo = false, kYes = true }; |
| enum class ColorType { kNone, kByte, kHalf, kLast = kHalf }; |
| static const int kColorTypeCount = static_cast<int>(ColorType::kLast) + 1; |
| |
| // Specifies the vertex configuration for an op that renders per-edge AA quads. The vertex |
| // order (when enabled) is device position, color, local position, domain, aa edge equations. |
| // This order matches the constructor argument order of VertexSpec and is the order that |
| // GPAttributes maintains. If hasLocalCoords is false, then the local quad type can be ignored. |
| struct VertexSpec { |
| public: |
| VertexSpec(GrQuadType deviceQuadType, ColorType colorType, GrQuadType localQuadType, |
| bool hasLocalCoords, Domain domain, GrAAType aa, bool alphaAsCoverage) |
| : fDeviceQuadType(static_cast<unsigned>(deviceQuadType)) |
| , fLocalQuadType(static_cast<unsigned>(localQuadType)) |
| , fHasLocalCoords(hasLocalCoords) |
| , fColorType(static_cast<unsigned>(colorType)) |
| , fHasDomain(static_cast<unsigned>(domain)) |
| , fUsesCoverageAA(aa == GrAAType::kCoverage) |
| , fCompatibleWithAlphaAsCoverage(alphaAsCoverage) { } |
| |
| GrQuadType deviceQuadType() const { return static_cast<GrQuadType>(fDeviceQuadType); } |
| GrQuadType localQuadType() const { return static_cast<GrQuadType>(fLocalQuadType); } |
| bool hasLocalCoords() const { return fHasLocalCoords; } |
| ColorType colorType() const { return static_cast<ColorType>(fColorType); } |
| bool hasVertexColors() const { return ColorType::kNone != this->colorType(); } |
| bool hasDomain() const { return fHasDomain; } |
| bool usesCoverageAA() const { return fUsesCoverageAA; } |
| bool compatibleWithAlphaAsCoverage() const { return fCompatibleWithAlphaAsCoverage; } |
| |
| // Will always be 2 or 3 |
| int deviceDimensionality() const; |
| // Will always be 0 if hasLocalCoords is false, otherwise will be 2 or 3 |
| int localDimensionality() const; |
| |
| int verticesPerQuad() const { return fUsesCoverageAA ? 8 : 4; } |
| private: |
| static_assert(kGrQuadTypeCount <= 4, "GrQuadType doesn't fit in 2 bits"); |
| static_assert(kColorTypeCount <= 4, "Color doesn't fit in 2 bits"); |
| |
| unsigned fDeviceQuadType: 2; |
| unsigned fLocalQuadType: 2; |
| unsigned fHasLocalCoords: 1; |
| unsigned fColorType : 2; |
| unsigned fHasDomain: 1; |
| unsigned fUsesCoverageAA: 1; |
| unsigned fCompatibleWithAlphaAsCoverage: 1; |
| }; |
| |
| sk_sp<GrGeometryProcessor> MakeProcessor(const VertexSpec& spec); |
| |
| sk_sp<GrGeometryProcessor> MakeTexturedProcessor(const VertexSpec& spec, |
| const GrShaderCaps& caps, GrTextureType textureType, GrPixelConfig textureConfig, |
| const GrSamplerState& samplerState, uint32_t extraSamplerKey, |
| sk_sp<GrColorSpaceXform> textureColorSpaceXform); |
| |
| // Fill vertices with the vertex data needed to represent the given quad. The device position, |
| // local coords, vertex color, domain, and edge coefficients will be written and/or computed |
| // based on the configuration in the vertex spec; if that attribute is disabled in the spec, |
| // then its corresponding function argument is ignored. |
| // |
| // Returns the advanced pointer in vertices. |
| void* Tessellate(void* vertices, const VertexSpec& spec, const GrPerspQuad& deviceQuad, |
| const SkPMColor4f& color, const GrPerspQuad& localQuad, const SkRect& domain, |
| GrQuadAAFlags aa); |
| |
| // The mesh will have its index data configured to meet the expectations of the Tessellate() |
| // function, but it the calling code must handle filling a vertex buffer via Tessellate() and |
| // then assigning it to the returned mesh. |
| // |
| // Returns false if the index data could not be allocated. |
| bool ConfigureMeshIndices(GrMeshDrawOp::Target* target, GrMesh* mesh, const VertexSpec& spec, |
| int quadCount); |
| |
| static constexpr int kNumAAQuadsInIndexBuffer = 512; |
| |
| } // namespace GrQuadPerEdgeAA |
| |
| #endif // GrQuadPerEdgeAA_DEFINED |