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