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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. GrGLEffectMatrix is a handy class that implements a local coordina
te matrix that | 17 * installed. GrGLEffectMatrix is a handy class that implements a local coordina
te matrix that |
18 * automatically accounts for the coord-change matrix. | 18 * automatically accounts for the coord-change matrix. |
19 */ | 19 */ |
20 class GrDrawEffect { | 20 class GrDrawEffect { |
21 public: | 21 public: |
22 GrDrawEffect(const GrEffectStage& stage, bool explicitLocalCoords) | 22 GrDrawEffect(const GrEffectStage& stage, bool explicitLocalCoords) |
23 : fEffectStage(&stage) | 23 : fEffectStage(&stage) |
24 , fExplicitLocalCoords(explicitLocalCoords) { | 24 , fExplicitLocalCoords(explicitLocalCoords) { |
25 GrAssert(NULL != fEffectStage); | 25 SkASSERT(NULL != fEffectStage); |
26 GrAssert(NULL != fEffectStage->getEffect()); | 26 SkASSERT(NULL != fEffectStage->getEffect()); |
27 } | 27 } |
28 const GrEffectRef* effect() const { return fEffectStage->getEffect(); } | 28 const GrEffectRef* effect() const { return fEffectStage->getEffect(); } |
29 | 29 |
30 template <typename T> | 30 template <typename T> |
31 const T& castEffect() const { return *static_cast<const T*>(this->effect()->
get()); } | 31 const T& castEffect() const { return *static_cast<const T*>(this->effect()->
get()); } |
32 | 32 |
33 const SkMatrix& getCoordChangeMatrix() const { | 33 const SkMatrix& getCoordChangeMatrix() const { |
34 if (fExplicitLocalCoords) { | 34 if (fExplicitLocalCoords) { |
35 return SkMatrix::I(); | 35 return SkMatrix::I(); |
36 } else { | 36 } else { |
37 return fEffectStage->getCoordChangeMatrix(); | 37 return fEffectStage->getCoordChangeMatrix(); |
38 } | 38 } |
39 } | 39 } |
40 | 40 |
41 bool programHasExplicitLocalCoords() const { return fExplicitLocalCoords; } | 41 bool programHasExplicitLocalCoords() const { return fExplicitLocalCoords; } |
42 | 42 |
43 const int* getVertexAttribIndices() const { return fEffectStage->getVertexAt
tribIndices(); } | 43 const int* getVertexAttribIndices() const { return fEffectStage->getVertexAt
tribIndices(); } |
44 int getVertexAttribIndexCount() const { return fEffectStage->getVertexAttrib
IndexCount(); } | 44 int getVertexAttribIndexCount() const { return fEffectStage->getVertexAttrib
IndexCount(); } |
45 | 45 |
46 private: | 46 private: |
47 const GrEffectStage* fEffectStage; | 47 const GrEffectStage* fEffectStage; |
48 bool fExplicitLocalCoords; | 48 bool fExplicitLocalCoords; |
49 }; | 49 }; |
50 | 50 |
51 #endif | 51 #endif |
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