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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 GrGLGeometryProcessor_DEFINED | 8 #ifndef GrGLGeometryProcessor_DEFINED |
9 #define GrGLGeometryProcessor_DEFINED | 9 #define GrGLGeometryProcessor_DEFINED |
10 | 10 |
11 #include "GrGLPrimitiveProcessor.h" | 11 #include "GrGLPrimitiveProcessor.h" |
12 | 12 |
13 class GrGLGPBuilder; | 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 GrGLGeometryProcessor : public GrGLPrimitiveProcessor { | 20 class GrGLGeometryProcessor : public GrGLPrimitiveProcessor { |
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; |
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35 void setTransformDataHelper(const GrPrimitiveProcessor& primProc, | 35 void setTransformDataHelper(const GrPrimitiveProcessor& primProc, |
36 const GrGLSLProgramDataManager& pdman, | 36 const GrGLSLProgramDataManager& pdman, |
37 int index, | 37 int index, |
38 const SkTArray<const GrCoordTransform*, true>& t
ransforms) { | 38 const SkTArray<const GrCoordTransform*, true>& t
ransforms) { |
39 const GeometryProcessor& gp = primProc.cast<GeometryProcessor>(); | 39 const GeometryProcessor& gp = primProc.cast<GeometryProcessor>(); |
40 this->setTransformDataMatrix(gp.localMatrix(), pdman, index, transforms)
; | 40 this->setTransformDataMatrix(gp.localMatrix(), pdman, index, transforms)
; |
41 } | 41 } |
42 | 42 |
43 protected: | 43 protected: |
44 // Emit a uniform matrix for each coord transform. | 44 // Emit a uniform matrix for each coord transform. |
45 void emitTransforms(GrGLGPBuilder* gp, | 45 void emitTransforms(GrGLSLGPBuilder* gp, |
46 const GrShaderVar& posVar, | 46 const GrShaderVar& posVar, |
47 const char* localCoords, | 47 const char* localCoords, |
48 const TransformsIn& tin, | 48 const TransformsIn& tin, |
49 TransformsOut* tout) { | 49 TransformsOut* tout) { |
50 this->emitTransforms(gp, posVar, localCoords, SkMatrix::I(), tin, tout); | 50 this->emitTransforms(gp, posVar, localCoords, SkMatrix::I(), tin, tout); |
51 } | 51 } |
52 | 52 |
53 // Emit pre-transformed coords as a vertex attribute per coord-transform. | 53 // Emit pre-transformed coords as a vertex attribute per coord-transform. |
54 void emitTransforms(GrGLGPBuilder*, | 54 void emitTransforms(GrGLSLGPBuilder*, |
55 const GrShaderVar& posVar, | 55 const GrShaderVar& posVar, |
56 const char* localCoords, | 56 const char* localCoords, |
57 const SkMatrix& localMatrix, | 57 const SkMatrix& localMatrix, |
58 const TransformsIn&, | 58 const TransformsIn&, |
59 TransformsOut*); | 59 TransformsOut*); |
60 | 60 |
61 // caller has emitted transforms via attributes | 61 // caller has emitted transforms via attributes |
62 void emitTransforms(GrGLGPBuilder*, | 62 void emitTransforms(GrGLSLGPBuilder*, |
63 const char* localCoords, | 63 const char* localCoords, |
64 const TransformsIn& tin, | 64 const TransformsIn& tin, |
65 TransformsOut* tout); | 65 TransformsOut* tout); |
66 | 66 |
67 struct GrGPArgs { | 67 struct GrGPArgs { |
68 // The variable used by a GP to store its position. It can be | 68 // The variable used by a GP to store its position. It can be |
69 // either a vec2 or a vec3 depending on the presence of perspective. | 69 // either a vec2 or a vec3 depending on the presence of perspective. |
70 GrShaderVar fPositionVar; | 70 GrShaderVar fPositionVar; |
71 }; | 71 }; |
72 | 72 |
73 // Create the correct type of position variable given the CTM | 73 // Create the correct type of position variable given the CTM |
74 void setupPosition(GrGLGPBuilder*, GrGPArgs*, const char* posName); | 74 void setupPosition(GrGLSLGPBuilder*, GrGPArgs*, const char* posName); |
75 void setupPosition(GrGLGPBuilder*, GrGPArgs*, const char* posName, const SkM
atrix& mat, | 75 void setupPosition(GrGLSLGPBuilder*, GrGPArgs*, const char* posName, const S
kMatrix& mat, |
76 UniformHandle* viewMatrixUniform); | 76 UniformHandle* viewMatrixUniform); |
77 | 77 |
78 static uint32_t ComputePosKey(const SkMatrix& mat) { | 78 static uint32_t ComputePosKey(const SkMatrix& mat) { |
79 if (mat.isIdentity()) { | 79 if (mat.isIdentity()) { |
80 return 0x0; | 80 return 0x0; |
81 } else if (!mat.hasPerspective()) { | 81 } else if (!mat.hasPerspective()) { |
82 return 0x01; | 82 return 0x01; |
83 } else { | 83 } else { |
84 return 0x02; | 84 return 0x02; |
85 } | 85 } |
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101 } | 101 } |
102 } | 102 } |
103 } | 103 } |
104 | 104 |
105 virtual void onEmitCode(EmitArgs&, GrGPArgs*) = 0; | 105 virtual void onEmitCode(EmitArgs&, GrGPArgs*) = 0; |
106 | 106 |
107 typedef GrGLPrimitiveProcessor INHERITED; | 107 typedef GrGLPrimitiveProcessor INHERITED; |
108 }; | 108 }; |
109 | 109 |
110 #endif | 110 #endif |
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