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comparison: gfx/skia/trunk/src/gpu/effects/GrBicubicEffect.h
gfx/skia/trunk/src/gpu/effects/GrBicubicEffect.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:78def00a846f |
|---|---|
| 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 GrBicubicTextureEffect_DEFINED | |
| 9 #define GrBicubicTextureEffect_DEFINED | |
| 10 | |
| 11 #include "GrSingleTextureEffect.h" | |
| 12 #include "GrTextureDomain.h" | |
| 13 #include "GrDrawEffect.h" | |
| 14 #include "gl/GrGLEffect.h" | |
| 15 #include "GrTBackendEffectFactory.h" | |
| 16 | |
| 17 class GrGLBicubicEffect; | |
| 18 | |
| 19 class GrBicubicEffect : public GrSingleTextureEffect { | |
| 20 public: | |
| 21 enum { | |
| 22 kFilterTexelPad = 2, // Given a src rect in texels to be filtered, this number of | |
| 23 // surrounding texels are needed by the kernel in x and y. | |
| 24 }; | |
| 25 virtual ~GrBicubicEffect(); | |
| 26 | |
| 27 static const char* Name() { return "Bicubic"; } | |
| 28 const float* coefficients() const { return fCoefficients; } | |
| 29 | |
| 30 typedef GrGLBicubicEffect GLEffect; | |
| 31 | |
| 32 virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; | |
| 33 virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE; | |
| 34 | |
| 35 const GrTextureDomain& domain() const { return fDomain; } | |
| 36 | |
| 37 /** | |
| 38 * Create a simple filter effect with custom bicubic coefficients and optional domain. | |
| 39 */ | |
| 40 static GrEffectRef* Create(GrTexture* tex, const SkScalar coefficients[16], | |
| 41 const SkRect* domain = NULL) { | |
| 42 if (NULL == domain) { | |
| 43 static const SkShader::TileMode kTileModes[] = { SkShader::kClamp_TileMode, | |
| 44 SkShader::kClamp_TileMode }; | |
| 45 return Create(tex, coefficients, MakeDivByTextureWHMatrix(tex), kTileModes); | |
| 46 } else { | |
| 47 AutoEffectUnref effect(SkNEW_ARGS(GrBicubicEffect, (tex, coefficients, | |
| 48 MakeDivByTextureWHMatrix(tex), | |
| 49 *domain))); | |
| 50 return CreateEffectRef(effect); | |
| 51 } | |
| 52 } | |
| 53 | |
| 54 /** | |
| 55 * Create a Mitchell filter effect with specified texture matrix and x/y tile modes. | |
| 56 */ | |
| 57 static GrEffectRef* Create(GrTexture* tex, const SkMatrix& matrix, | |
| 58 SkShader::TileMode tileModes[2]) { | |
| 59 return Create(tex, gMitchellCoefficients, matrix, tileModes); | |
| 60 } | |
| 61 | |
| 62 /** | |
| 63 * Create a filter effect with custom bicubic coefficients, the texture matrix, and the x/y | |
| 64 * tilemodes. | |
| 65 */ | |
| 66 static GrEffectRef* Create(GrTexture* tex, const SkScalar coefficients[16], | |
| 67 const SkMatrix& matrix, const SkShader::TileMode tileModes[2]) { | |
| 68 AutoEffectUnref effect(SkNEW_ARGS(GrBicubicEffect, (tex, coefficients, matrix, tileModes))); | |
| 69 return CreateEffectRef(effect); | |
| 70 } | |
| 71 | |
| 72 /** | |
| 73 * Create a Mitchell filter effect with a texture matrix and a domain. | |
| 74 */ | |
| 75 static GrEffectRef* Create(GrTexture* tex, const SkMatrix& matrix, const SkRect& domain) { | |
| 76 AutoEffectUnref effect(SkNEW_ARGS(GrBicubicEffect, (tex, gMitchellCoefficients, matrix, | |
| 77 domain))); | |
| 78 return CreateEffectRef(effect); | |
| 79 } | |
| 80 | |
| 81 private: | |
| 82 GrBicubicEffect(GrTexture*, const SkScalar coefficients[16], | |
| 83 const SkMatrix &matrix, const SkShader::TileMode tileModes[2]); | |
| 84 GrBicubicEffect(GrTexture*, const SkScalar coefficients[16], | |
| 85 const SkMatrix &matrix, const SkRect& domain); | |
| 86 virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE; | |
| 87 | |
| 88 float fCoefficients[16]; | |
| 89 GrTextureDomain fDomain; | |
| 90 | |
| 91 GR_DECLARE_EFFECT_TEST; | |
| 92 | |
| 93 static const SkScalar gMitchellCoefficients[16]; | |
| 94 | |
| 95 typedef GrSingleTextureEffect INHERITED; | |
| 96 }; | |
| 97 | |
| 98 #endif |
