1 | /* |
2 | * Copyright 2020 Google LLC. |
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 GrPathShader_DEFINED |
9 | #define GrPathShader_DEFINED |
10 | |
11 | #include "src/gpu/GrGeometryProcessor.h" |
12 | #include "src/gpu/GrOpFlushState.h" |
13 | #include "src/gpu/GrOpsRenderPass.h" |
14 | #include "src/gpu/GrProgramInfo.h" |
15 | |
16 | // This is a common base class for shaders in the GPU tessellator. |
17 | class GrPathShader : public GrGeometryProcessor { |
18 | public: |
19 | GrPathShader(ClassID classID, const SkMatrix& viewMatrix, GrPrimitiveType primitiveType, |
20 | int tessellationPatchVertexCount) |
21 | : GrGeometryProcessor(classID) |
22 | , fViewMatrix(viewMatrix) |
23 | , fPrimitiveType(primitiveType) |
24 | , fTessellationPatchVertexCount(tessellationPatchVertexCount) { |
25 | if (fTessellationPatchVertexCount) { |
26 | this->setWillUseTessellationShaders(); |
27 | } |
28 | } |
29 | |
30 | const SkMatrix& viewMatrix() const { return fViewMatrix; } |
31 | |
32 | // This subclass is used to simplify the argument list for constructing GrProgramInfo from a |
33 | // GrPathShader. |
34 | class ProgramInfo : public GrProgramInfo { |
35 | public: |
36 | ProgramInfo(const GrSurfaceProxyView* view, const GrPipeline* pipeline, |
37 | const GrPathShader* shader) |
38 | : ProgramInfo(view->asRenderTargetProxy(), view->origin(), pipeline, shader) { |
39 | } |
40 | ProgramInfo(const GrRenderTargetProxy* proxy, GrSurfaceOrigin origin, |
41 | const GrPipeline* pipeline, const GrPathShader* shader) |
42 | : GrProgramInfo(proxy->numSamples(), proxy->numStencilSamples(), |
43 | proxy->backendFormat(), origin, pipeline, shader, |
44 | shader->fPrimitiveType, shader->fTessellationPatchVertexCount) { |
45 | } |
46 | }; |
47 | |
48 | private: |
49 | const SkMatrix fViewMatrix; |
50 | const GrPrimitiveType fPrimitiveType; |
51 | const int fTessellationPatchVertexCount; |
52 | |
53 | class Impl; |
54 | }; |
55 | |
56 | #endif |
57 | |