| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrDefaultGeoProcFactory_DEFINED |
| #define GrDefaultGeoProcFactory_DEFINED |
| |
| #include "include/private/SkColorData.h" |
| #include "include/private/base/SkAssert.h" |
| |
| #include <cstdint> |
| |
| class GrGeometryProcessor; |
| class SkArenaAlloc; |
| class SkMatrix; |
| |
| /* |
| * A factory for creating default Geometry Processors which simply multiply position by the uniform |
| * view matrix and wire through color, coverage, UV coords if requested. |
| */ |
| namespace GrDefaultGeoProcFactory { |
| struct Color { |
| enum Type { |
| kPremulGrColorUniform_Type, |
| kPremulGrColorAttribute_Type, |
| kPremulWideColorAttribute_Type, |
| }; |
| explicit Color(const SkPMColor4f& color) |
| : fType(kPremulGrColorUniform_Type) |
| , fColor(color) {} |
| Color(Type type) |
| : fType(type) |
| , fColor(SK_PMColor4fILLEGAL) { |
| SkASSERT(type != kPremulGrColorUniform_Type); |
| } |
| |
| Type fType; |
| SkPMColor4f fColor; |
| }; |
| |
| struct Coverage { |
| enum Type { |
| kSolid_Type, |
| kUniform_Type, |
| kAttribute_Type, |
| kAttributeTweakAlpha_Type, |
| kAttributeUnclamped_Type, // Fragment shader will call saturate(coverage) before using. |
| // (Not compatible with kAttributeTweakAlpha_Type.) |
| }; |
| explicit Coverage(uint8_t coverage) : fType(kUniform_Type), fCoverage(coverage) {} |
| Coverage(Type type) : fType(type), fCoverage(0xff) { |
| SkASSERT(type != kUniform_Type); |
| } |
| |
| Type fType; |
| uint8_t fCoverage; |
| }; |
| |
| struct LocalCoords { |
| enum Type { |
| kUnused_Type, |
| kUsePosition_Type, |
| kHasExplicit_Type, |
| }; |
| LocalCoords(Type type) : fType(type), fMatrix(nullptr) {} |
| LocalCoords(Type type, const SkMatrix* matrix) : fType(type), fMatrix(matrix) { |
| SkASSERT(kUnused_Type != type); |
| } |
| bool hasLocalMatrix() const { return nullptr != fMatrix; } |
| |
| Type fType; |
| const SkMatrix* fMatrix; |
| }; |
| |
| GrGeometryProcessor* Make(SkArenaAlloc*, |
| const Color&, |
| const Coverage&, |
| const LocalCoords&, |
| const SkMatrix& viewMatrix); |
| |
| /* |
| * Use this factory to create a GrGeometryProcessor that expects a device space vertex position |
| * attribute. The view matrix must still be provided to compute correctly transformed |
| * coordinates for GrFragmentProcessors. It may fail if the view matrix is not invertible. |
| */ |
| GrGeometryProcessor* MakeForDeviceSpace(SkArenaAlloc*, |
| const Color&, |
| const Coverage&, |
| const LocalCoords&, |
| const SkMatrix& viewMatrix); |
| } // namespace GrDefaultGeoProcFactory |
| |
| #endif |