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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 "GrGLProcessor.h" | 11 #include "GrGLProcessor.h" |
12 | 12 |
13 class GrBatchTracker; | 13 class GrBatchTracker; |
14 class GrGLGPBuilder; | 14 class GrGLGPBuilder; |
15 | 15 |
16 /** | 16 /** |
17 * If a GL effect needs a GrGLFullShaderBuilder* object to emit vertex code, the
n it must inherit | 17 * If a GL effect needs a GrGLFullShaderBuilder* object to emit vertex code, the
n it must inherit |
18 * from this class. Since paths don't have vertices, this class is only meant to
be used internally | 18 * from this class. Since paths don't have vertices, this class is only meant to
be used internally |
19 * by skia, for special cases. | 19 * by skia, for special cases. |
20 */ | 20 */ |
21 class GrGLGeometryProcessor { | 21 class GrGLGeometryProcessor { |
22 public: | 22 public: |
23 GrGLGeometryProcessor() {} | 23 GrGLGeometryProcessor() {} |
24 virtual ~GrGLGeometryProcessor() {} | 24 virtual ~GrGLGeometryProcessor() {} |
25 | 25 |
| 26 typedef GrGLProgramDataManager::UniformHandle UniformHandle; |
26 typedef GrGLProcessor::TextureSamplerArray TextureSamplerArray; | 27 typedef GrGLProcessor::TextureSamplerArray TextureSamplerArray; |
| 28 |
27 struct EmitArgs { | 29 struct EmitArgs { |
28 EmitArgs(GrGLGPBuilder* pb, | 30 EmitArgs(GrGLGPBuilder* pb, |
29 const GrGeometryProcessor& gp, | 31 const GrPrimitiveProcessor& gp, |
30 const GrBatchTracker& bt, | 32 const GrBatchTracker& bt, |
31 const char* outputColor, | 33 const char* outputColor, |
32 const char* outputCoverage, | 34 const char* outputCoverage, |
33 const TextureSamplerArray& samplers) | 35 const TextureSamplerArray& samplers) |
34 : fPB(pb) | 36 : fPB(pb) |
35 , fGP(gp) | 37 , fGP(gp) |
36 , fBT(bt) | 38 , fBT(bt) |
37 , fOutputColor(outputColor) | 39 , fOutputColor(outputColor) |
38 , fOutputCoverage(outputCoverage) | 40 , fOutputCoverage(outputCoverage) |
39 , fSamplers(samplers) {} | 41 , fSamplers(samplers) {} |
40 GrGLGPBuilder* fPB; | 42 GrGLGPBuilder* fPB; |
41 const GrGeometryProcessor& fGP; | 43 const GrPrimitiveProcessor& fGP; |
42 const GrBatchTracker& fBT; | 44 const GrBatchTracker& fBT; |
43 const char* fOutputColor; | 45 const char* fOutputColor; |
44 const char* fOutputCoverage; | 46 const char* fOutputCoverage; |
45 const TextureSamplerArray& fSamplers; | 47 const TextureSamplerArray& fSamplers; |
46 }; | 48 }; |
| 49 |
47 /** | 50 /** |
48 * This is similar to emitCode() in the base class, except it takes a full s
hader builder. | 51 * This is similar to emitCode() in the base class, except it takes a full s
hader builder. |
49 * This allows the effect subclass to emit vertex code. | 52 * This allows the effect subclass to emit vertex code. |
50 */ | 53 */ |
51 virtual void emitCode(const EmitArgs&) = 0; | 54 virtual void emitCode(const EmitArgs&) = 0; |
52 | 55 |
53 /** A GrGLGeometryProcessor instance can be reused with any GrGLGeometryProc
essor that produces | 56 /** A GrGLGeometryProcessor instance can be reused with any GrGLGeometryProc
essor that produces |
54 the same stage key; this function reads data from a GrGLGeometryProcesso
r and uploads any | 57 the same stage key; this function reads data from a GrGLGeometryProcesso
r and uploads any |
55 uniform variables required by the shaders created in emitCode(). The Gr
GeometryProcessor | 58 uniform variables required by the shaders created in emitCode(). The Gr
GeometryProcessor |
56 parameter is guaranteed to be of the same type that created this GrGLGeo
metryProcessor and | 59 parameter is guaranteed to be of the same type that created this GrGLGeo
metryProcessor and |
57 to have an identical processor key as the one that created this GrGLGeom
etryProcessor. */ | 60 to have an identical processor key as the one that created this GrGLGeom
etryProcessor. */ |
58 virtual void setData(const GrGLProgramDataManager&, | 61 virtual void setData(const GrGLProgramDataManager&, |
59 const GrGeometryProcessor&, | 62 const GrPrimitiveProcessor&, |
60 const GrBatchTracker&) = 0; | 63 const GrBatchTracker&) = 0; |
61 | 64 |
| 65 protected: |
| 66 /** a helper which can setup vertex, constant, or uniform color depending on
inputType. |
| 67 * This function will only do the minimum required to emit the correct shad
er code. If |
| 68 * inputType == attribute, then colorAttr must not be NULL. Likewise, if i
nputType == Uniform |
| 69 * then colorUniform must not be NULL. |
| 70 */ |
| 71 void setupColorPassThrough(GrGLGPBuilder* pb, |
| 72 GrGPInput inputType, |
| 73 const char* inputName, |
| 74 const GrGeometryProcessor::GrAttribute* colorAttr
, |
| 75 UniformHandle* colorUniform); |
| 76 |
62 private: | 77 private: |
63 typedef GrGLProcessor INHERITED; | 78 typedef GrGLProcessor INHERITED; |
64 }; | 79 }; |
65 | 80 |
66 #endif | 81 #endif |
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