commit-bot@chromium.org | 234d4fb | 2013-09-30 19:55:49 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 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 GrVertexEffect_DEFINED |
| 9 | #define GrVertexEffect_DEFINED |
| 10 | |
| 11 | #include "GrEffect.h" |
| 12 | |
| 13 | /** |
| 14 | * If an effect needs specialized vertex shader code, then it must inherit from this class. |
| 15 | * Otherwise it won't be able to add vertex attribs, and it might be given a vertexless shader |
| 16 | * program in emitCode. |
| 17 | */ |
| 18 | class GrVertexEffect : public GrEffect { |
| 19 | public: |
| 20 | GrVertexEffect() { fHasVertexCode = true; } |
| 21 | |
| 22 | protected: |
| 23 | /** |
| 24 | * Subclasses call this from their constructor to register vertex attributes (at most |
| 25 | * kMaxVertexAttribs). This must only be called from the constructor because GrEffects are |
| 26 | * immutable. |
| 27 | */ |
| 28 | void addVertexAttrib(GrSLType type) { |
| 29 | SkASSERT(fVertexAttribTypes.count() < kMaxVertexAttribs); |
| 30 | fVertexAttribTypes.push_back(type); |
| 31 | } |
| 32 | |
| 33 | private: |
| 34 | typedef GrEffect INHERITED; |
| 35 | }; |
| 36 | |
| 37 | #endif |