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| 1 /* |
| 2 * Copyright 2014 Google Inc. |
| 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 GrGLXferProcessor_DEFINED |
| 9 #define GrGLXferProcessor_DEFINED |
| 10 |
| 11 #include "GrGLProcessor.h" |
| 12 |
| 13 class GrGLXPBuilder; |
| 14 |
| 15 class GrGLXferProcessor { |
| 16 public: |
| 17 GrGLXferProcessor() {} |
| 18 virtual ~GrGLXferProcessor() {} |
| 19 |
| 20 typedef GrGLProcessor::TextureSamplerArray TextureSamplerArray; |
| 21 struct EmitArgs { |
| 22 EmitArgs(GrGLXPBuilder* pb, |
| 23 const GrXferProcessor& xp, |
| 24 const char* inputColor, |
| 25 const char* inputCoverage, |
| 26 const char* outputPrimary, |
| 27 const char* outputSecondary, |
| 28 const TextureSamplerArray& samplers) |
| 29 : fPB(pb) |
| 30 , fXP(xp) |
| 31 , fInputColor(inputColor) |
| 32 , fInputCoverage(inputCoverage) |
| 33 , fOutputPrimary(outputPrimary) |
| 34 , fOutputSecondary(outputSecondary) |
| 35 , fSamplers(samplers) {} |
| 36 |
| 37 GrGLXPBuilder* fPB; |
| 38 const GrXferProcessor& fXP; |
| 39 const char* fInputColor; |
| 40 const char* fInputCoverage; |
| 41 const char* fOutputPrimary; |
| 42 const char* fOutputSecondary; |
| 43 const TextureSamplerArray& fSamplers; |
| 44 }; |
| 45 /** |
| 46 * This is similar to emitCode() in the base class, except it takes a full s
hader builder. |
| 47 * This allows the effect subclass to emit vertex code. |
| 48 */ |
| 49 virtual void emitCode(const EmitArgs&) = 0; |
| 50 |
| 51 /** A GrGLXferProcessor instance can be reused with any GrGLXferProcessor th
at produces |
| 52 the same stage key; this function reads data from a GrGLXferProcessor an
d uploads any |
| 53 uniform variables required by the shaders created in emitCode(). The Gr
XferProcessor |
| 54 parameter is guaranteed to be of the same type that created this GrGLXfe
rProcessor and |
| 55 to have an identical processor key as the one that created this GrGLXfer
Processor. */ |
| 56 virtual void setData(const GrGLProgramDataManager&, |
| 57 const GrXferProcessor&) = 0; |
| 58 private: |
| 59 typedef GrGLProcessor INHERITED; |
| 60 }; |
| 61 #endif |
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