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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 GrGLNvprProgramBuilder_DEFINED |
| 9 #define GrGLNvprProgramBuilder_DEFINED |
| 10 |
| 11 #include "GrGLProgramBuilder.h" |
| 12 |
| 13 class GrGLNvprProgramBuilder : public GrGLProgramBuilder { |
| 14 public: |
| 15 GrGLNvprProgramBuilder(GrGpuGL*, const GrOptDrawState&, const GrGLProgramDes
c&); |
| 16 |
| 17 /* |
| 18 * The separable varying info must be passed to GrGLProgram so this must |
| 19 * be part of the public interface |
| 20 */ |
| 21 struct SeparableVaryingInfo { |
| 22 GrGLShaderVar fVariable; |
| 23 GrGLint fLocation; |
| 24 }; |
| 25 |
| 26 typedef GrTAllocator<SeparableVaryingInfo> SeparableVaryingInfoArray; |
| 27 |
| 28 virtual GrGLProgram* createProgram(GrGLuint programID); |
| 29 |
| 30 private: |
| 31 virtual void emitTransforms(const GrProcessorStage&, |
| 32 GrGLProcessor::TransformedCoordsArray* outCoords
, |
| 33 GrGLInstalledProcessors*) SK_OVERRIDE; |
| 34 |
| 35 typedef GrGLInstalledProcessors::ShaderVarHandle ShaderVarHandle; |
| 36 |
| 37 /** |
| 38 * Add a separable varying input variable to the current program. |
| 39 * A separable varying (fragment shader input) is a varying that can be used
also when vertex |
| 40 * shaders are not used. With a vertex shader, the operation is same as with
other |
| 41 * varyings. Without a vertex shader, such as with NV_path_rendering, GL API
s are used to |
| 42 * populate the variable. The APIs can refer to the variable through the ret
urned handle. |
| 43 */ |
| 44 ShaderVarHandle addSeparableVarying(GrSLType type, |
| 45 const char* name, |
| 46 const char** vsOutName, |
| 47 const char** fsInName); |
| 48 |
| 49 void resolveSeparableVaryings(GrGLuint programId); |
| 50 |
| 51 SeparableVaryingInfoArray fSeparableVaryingInfos; |
| 52 |
| 53 typedef GrGLProgramBuilder INHERITED; |
| 54 }; |
| 55 |
| 56 #endif |
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