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comparison: gfx/skia/trunk/include/gpu/GrDrawEffect.h
gfx/skia/trunk/include/gpu/GrDrawEffect.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:cf2520783801 |
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| 1 | |
| 2 #ifndef GrDrawEffect_DEFINED | |
| 3 #define GrDrawEffect_DEFINED | |
| 4 | |
| 5 #include "GrEffectStage.h" | |
| 6 | |
| 7 /** | |
| 8 * This class is used to communicate the particular GrEffect used in a draw to the backend-specific | |
| 9 * effect subclass (e.g. GrGLEffect). It is used to by the backend-specific class to generate a | |
| 10 * cache key for the effect, generate code on a program cache miss, and to upload uniform values to | |
| 11 * the program. | |
| 12 * In addition to the effect, it also communicates any changes between the relationship between | |
| 13 * the view matrix and local coordinate system since the effect was installed in its GrDrawState. | |
| 14 * The typical use case is that sometime after an effect was installed a decision was made to draw | |
| 15 * in device coordinates (i.e. use an identity view-matrix). In such a case the GrDrawEffect's | |
| 16 * coord-change-matrix would be the inverse of the view matrix that was set when the effect was | |
| 17 * installed. | |
| 18 */ | |
| 19 class GrDrawEffect { | |
| 20 public: | |
| 21 GrDrawEffect(const GrEffectStage& stage, bool explicitLocalCoords) | |
| 22 : fEffectStage(&stage) | |
| 23 , fExplicitLocalCoords(explicitLocalCoords) { | |
| 24 SkASSERT(NULL != fEffectStage); | |
| 25 SkASSERT(NULL != fEffectStage->getEffect()); | |
| 26 } | |
| 27 const GrEffectRef* effect() const { return fEffectStage->getEffect(); } | |
| 28 | |
| 29 template <typename T> | |
| 30 const T& castEffect() const { return *static_cast<const T*>(this->effect()->get()); } | |
| 31 | |
| 32 const SkMatrix& getCoordChangeMatrix() const { | |
| 33 if (fExplicitLocalCoords) { | |
| 34 return SkMatrix::I(); | |
| 35 } else { | |
| 36 return fEffectStage->getCoordChangeMatrix(); | |
| 37 } | |
| 38 } | |
| 39 | |
| 40 bool programHasExplicitLocalCoords() const { return fExplicitLocalCoords; } | |
| 41 | |
| 42 const int* getVertexAttribIndices() const { return fEffectStage->getVertexAttribIndices(); } | |
| 43 int getVertexAttribIndexCount() const { return fEffectStage->getVertexAttribIndexCount(); } | |
| 44 | |
| 45 private: | |
| 46 const GrEffectStage* fEffectStage; | |
| 47 bool fExplicitLocalCoords; | |
| 48 }; | |
| 49 | |
| 50 #endif |
