OLD | NEW |
1 /* | 1 /* |
2 * Copyright 2013 Google Inc. | 2 * Copyright 2013 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef GrGLSLGeometryProcessor_DEFINED | 8 #ifndef GrGLSLGeometryProcessor_DEFINED |
9 #define GrGLSLGeometryProcessor_DEFINED | 9 #define GrGLSLGeometryProcessor_DEFINED |
10 | 10 |
11 #include "GrGLSLPrimitiveProcessor.h" | 11 #include "GrGLSLPrimitiveProcessor.h" |
12 | 12 |
13 class GrGLSLGPBuilder; | 13 class GrGLSLGPBuilder; |
14 | 14 |
15 /** | 15 /** |
16 * If a GL effect needs a GrGLFullShaderBuilder* object to emit vertex code, the
n it must inherit | 16 * If a GL effect needs a GrGLFullShaderBuilder* object to emit vertex code, the
n it must inherit |
17 * from this class. Since paths don't have vertices, this class is only meant to
be used internally | 17 * from this class. Since paths don't have vertices, this class is only meant to
be used internally |
18 * by skia, for special cases. | 18 * by skia, for special cases. |
19 */ | 19 */ |
20 class GrGLSLGeometryProcessor : public GrGLSLPrimitiveProcessor { | 20 class GrGLSLGeometryProcessor : public GrGLSLPrimitiveProcessor { |
21 public: | 21 public: |
22 /* Any general emit code goes in the base class emitCode. Subclasses overri
de onEmitCode */ | 22 /* Any general emit code goes in the base class emitCode. Subclasses overri
de onEmitCode */ |
23 void emitCode(EmitArgs&) override; | 23 void emitCode(EmitArgs&) override; |
24 | 24 |
25 // By default we use the identity matrix | |
26 void setTransformData(const GrPrimitiveProcessor&, | |
27 const GrGLSLProgramDataManager& pdman, | |
28 int index, | |
29 const SkTArray<const GrCoordTransform*, true>& transfo
rms) override { | |
30 this->setTransformDataHelper(SkMatrix::I(), pdman, index, transforms); | |
31 } | |
32 | |
33 protected: | 25 protected: |
34 // A helper which subclasses can use if needed and used above in the default
setTransformData(). | 26 // A helper which subclasses can use if needed and used above in the default
setTransformData(). |
35 void setTransformDataHelper(const SkMatrix& localMatrix, | 27 void setTransformDataHelper(const SkMatrix& localMatrix, |
36 const GrGLSLProgramDataManager& pdman, | 28 const GrGLSLProgramDataManager& pdman, |
37 int index, | 29 FPCoordTransformIter*); |
38 const SkTArray<const GrCoordTransform*, true>& t
ransforms) { | |
39 SkTArray<TransformUniform, true>& procTransforms = fInstalledTransforms[
index]; | |
40 int numTransforms = transforms.count(); | |
41 for (int t = 0; t < numTransforms; ++t) { | |
42 SkASSERT(procTransforms[t].fHandle.isValid()); | |
43 const SkMatrix& transform = GetTransformMatrix(localMatrix, *transfo
rms[t]); | |
44 if (!procTransforms[t].fCurrentValue.cheapEqualTo(transform)) { | |
45 pdman.setSkMatrix(procTransforms[t].fHandle.toIndex(), transform
); | |
46 procTransforms[t].fCurrentValue = transform; | |
47 } | |
48 } | |
49 } | |
50 | 30 |
51 // Emit a uniform matrix for each coord transform. | 31 // Emit a uniform matrix for each coord transform. |
52 void emitTransforms(GrGLSLVertexBuilder* vb, | 32 void emitTransforms(GrGLSLVertexBuilder* vb, |
53 GrGLSLVaryingHandler* varyingHandler, | 33 GrGLSLVaryingHandler* varyingHandler, |
54 GrGLSLUniformHandler* uniformHandler, | 34 GrGLSLUniformHandler* uniformHandler, |
55 const GrShaderVar& posVar, | 35 const GrShaderVar& posVar, |
56 const char* localCoords, | 36 const char* localCoords, |
57 const TransformsIn& tin, | 37 FPCoordTransformHandler* handler) { |
58 TransformsOut* tout) { | |
59 this->emitTransforms(vb, varyingHandler, uniformHandler, | 38 this->emitTransforms(vb, varyingHandler, uniformHandler, |
60 posVar, localCoords, SkMatrix::I(), tin, tout); | 39 posVar, localCoords, SkMatrix::I(), handler); |
61 } | 40 } |
62 | 41 |
63 // Emit pre-transformed coords as a vertex attribute per coord-transform. | 42 // Emit pre-transformed coords as a vertex attribute per coord-transform. |
64 void emitTransforms(GrGLSLVertexBuilder*, | 43 void emitTransforms(GrGLSLVertexBuilder*, |
65 GrGLSLVaryingHandler*, | 44 GrGLSLVaryingHandler*, |
66 GrGLSLUniformHandler*, | 45 GrGLSLUniformHandler*, |
67 const GrShaderVar& posVar, | 46 const GrShaderVar& posVar, |
68 const char* localCoords, | 47 const char* localCoords, |
69 const SkMatrix& localMatrix, | 48 const SkMatrix& localMatrix, |
70 const TransformsIn&, | 49 FPCoordTransformHandler*); |
71 TransformsOut*); | |
72 | 50 |
73 struct GrGPArgs { | 51 struct GrGPArgs { |
74 // The variable used by a GP to store its position. It can be | 52 // The variable used by a GP to store its position. It can be |
75 // either a vec2 or a vec3 depending on the presence of perspective. | 53 // either a vec2 or a vec3 depending on the presence of perspective. |
76 GrShaderVar fPositionVar; | 54 GrShaderVar fPositionVar; |
77 }; | 55 }; |
78 | 56 |
79 // Create the correct type of position variable given the CTM | 57 // Create the correct type of position variable given the CTM |
80 void setupPosition(GrGLSLVertexBuilder*, GrGPArgs*, const char* posName); | 58 void setupPosition(GrGLSLVertexBuilder*, GrGPArgs*, const char* posName); |
81 void setupPosition(GrGLSLVertexBuilder*, | 59 void setupPosition(GrGLSLVertexBuilder*, |
(...skipping 14 matching lines...) Loading... |
96 } | 74 } |
97 | 75 |
98 private: | 76 private: |
99 virtual void onEmitCode(EmitArgs&, GrGPArgs*) = 0; | 77 virtual void onEmitCode(EmitArgs&, GrGPArgs*) = 0; |
100 | 78 |
101 struct TransformUniform { | 79 struct TransformUniform { |
102 UniformHandle fHandle; | 80 UniformHandle fHandle; |
103 SkMatrix fCurrentValue = SkMatrix::InvalidMatrix(); | 81 SkMatrix fCurrentValue = SkMatrix::InvalidMatrix(); |
104 }; | 82 }; |
105 | 83 |
106 SkSTArray<8, SkSTArray<2, TransformUniform, true> > fInstalledTransforms; | 84 SkTArray<TransformUniform, true> fInstalledTransforms; |
107 | 85 |
108 typedef GrGLSLPrimitiveProcessor INHERITED; | 86 typedef GrGLSLPrimitiveProcessor INHERITED; |
109 }; | 87 }; |
110 | 88 |
111 #endif | 89 #endif |
OLD | NEW |