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comparison: gfx/skia/trunk/include/gpu/GrTBackendEffectFactory.h
gfx/skia/trunk/include/gpu/GrTBackendEffectFactory.h
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- TOR_BUG_9701
- changeset 9
- a63d609f5ebe
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| -1:000000000000 | 0:26c8c73d0e29 |
|---|---|
| 1 /* | |
| 2 * Copyright 2012 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 GrTBackendEffectFactory_DEFINED | |
| 9 #define GrTBackendEffectFactory_DEFINED | |
| 10 | |
| 11 #include "GrBackendEffectFactory.h" | |
| 12 #include "GrDrawEffect.h" | |
| 13 #include "gl/GrGLProgramEffects.h" | |
| 14 | |
| 15 /** | |
| 16 * Implements GrBackendEffectFactory for a GrEffect subclass as a singleton. | |
| 17 */ | |
| 18 template <typename EffectClass> | |
| 19 class GrTBackendEffectFactory : public GrBackendEffectFactory { | |
| 20 | |
| 21 public: | |
| 22 typedef typename EffectClass::GLEffect GLEffect; | |
| 23 | |
| 24 /** Returns a human-readable name that is accessible via GrEffect or | |
| 25 GrGLEffect and is consistent between the two of them. | |
| 26 */ | |
| 27 virtual const char* name() const SK_OVERRIDE { return EffectClass::Name(); } | |
| 28 | |
| 29 /** Returns a value that identifies the GLSL shader code generated by | |
| 30 a GrEffect. This enables caching of generated shaders. Part of the | |
| 31 id identifies the GrEffect subclass. The remainder is based | |
| 32 on the aspects of the GrEffect object's configuration that affect | |
| 33 GLSL code generation. */ | |
| 34 virtual EffectKey glEffectKey(const GrDrawEffect& drawEffect, | |
| 35 const GrGLCaps& caps) const SK_OVERRIDE { | |
| 36 SkASSERT(kIllegalEffectClassID != fEffectClassID); | |
| 37 EffectKey effectKey = GLEffect::GenKey(drawEffect, caps); | |
| 38 EffectKey textureKey = GrGLProgramEffects::GenTextureKey(drawEffect, caps); | |
| 39 EffectKey transformKey = GrGLProgramEffects::GenTransformKey(drawEffect); | |
| 40 EffectKey attribKey = GrGLProgramEffects::GenAttribKey(drawEffect); | |
| 41 #ifdef SK_DEBUG | |
| 42 static const EffectKey kIllegalEffectKeyMask = (uint16_t) (~((1U << kEffectKeyBits) - 1)); | |
| 43 SkASSERT(!(kIllegalEffectKeyMask & effectKey)); | |
| 44 | |
| 45 static const EffectKey kIllegalTextureKeyMask = (uint16_t) (~((1U << kTextureKeyBits) - 1)); | |
| 46 SkASSERT(!(kIllegalTextureKeyMask & textureKey)); | |
| 47 | |
| 48 static const EffectKey kIllegalTransformKeyMask = (uint16_t) (~((1U << kTransformKeyBits) - 1)); | |
| 49 SkASSERT(!(kIllegalTransformKeyMask & transformKey)); | |
| 50 | |
| 51 static const EffectKey kIllegalAttribKeyMask = (uint16_t) (~((1U << kAttribKeyBits) - 1)); | |
| 52 SkASSERT(!(kIllegalAttribKeyMask & textureKey)); | |
| 53 | |
| 54 static const EffectKey kIllegalClassIDMask = (uint16_t) (~((1U << kClassIDBits) - 1)); | |
| 55 SkASSERT(!(kIllegalClassIDMask & fEffectClassID)); | |
| 56 #endif | |
| 57 return (fEffectClassID << (kEffectKeyBits+kTextureKeyBits+kTransformKeyBits+kAttribKeyBits)) | | |
| 58 (attribKey << (kEffectKeyBits+kTextureKeyBits+kTransformKeyBits)) | | |
| 59 (transformKey << (kEffectKeyBits+kTextureKeyBits)) | | |
| 60 (textureKey << kEffectKeyBits) | | |
| 61 (effectKey); | |
| 62 } | |
| 63 | |
| 64 /** Returns a new instance of the appropriate *GL* implementation class | |
| 65 for the given GrEffect; caller is responsible for deleting | |
| 66 the object. */ | |
| 67 virtual GrGLEffect* createGLInstance(const GrDrawEffect& drawEffect) const SK_OVERRIDE { | |
| 68 return SkNEW_ARGS(GLEffect, (*this, drawEffect)); | |
| 69 } | |
| 70 | |
| 71 /** This class is a singleton. This function returns the single instance. | |
| 72 */ | |
| 73 static const GrBackendEffectFactory& getInstance() { | |
| 74 static SkAlignedSTStorage<1, GrTBackendEffectFactory> gInstanceMem; | |
| 75 static const GrTBackendEffectFactory* gInstance; | |
| 76 if (!gInstance) { | |
| 77 gInstance = SkNEW_PLACEMENT(gInstanceMem.get(), | |
| 78 GrTBackendEffectFactory); | |
| 79 } | |
| 80 return *gInstance; | |
| 81 } | |
| 82 | |
| 83 protected: | |
| 84 GrTBackendEffectFactory() { | |
| 85 fEffectClassID = GenID(); | |
| 86 } | |
| 87 }; | |
| 88 | |
| 89 #endif |
