| /* |
| * Copyright 2013 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef GrSimpleTextureEffect_DEFINED |
| #define GrSimpleTextureEffect_DEFINED |
| |
| #include "GrSingleTextureEffect.h" |
| |
| class GrGLSimpleTextureEffect; |
| |
| /** |
| * The output color of this effect is a modulation of the input color and a sample from a texture. |
| * It allows explicit specification of the filtering and wrap modes (GrTextureParams). It can use |
| * local coords, positions, or a custom vertex attribute as input texture coords. The input coords |
| * can have a matrix applied in the VS in both the local and position cases but not with a custom |
| * attribute coords at this time. It will add a varying to input interpolate texture coords to the |
| * FS. |
| */ |
| class GrSimpleTextureEffect : public GrSingleTextureEffect { |
| public: |
| /* unfiltered, clamp mode */ |
| static GrEffectRef* Create(GrTexture* tex, |
| const SkMatrix& matrix, |
| CoordsType coordsType = kLocal_CoordsType) { |
| GrAssert(kLocal_CoordsType == coordsType || kPosition_CoordsType == coordsType); |
| AutoEffectUnref effect(SkNEW_ARGS(GrSimpleTextureEffect, (tex, matrix, false, coordsType))); |
| return CreateEffectRef(effect); |
| } |
| |
| /* clamp mode */ |
| static GrEffectRef* Create(GrTexture* tex, |
| const SkMatrix& matrix, |
| bool bilerp, |
| CoordsType coordsType = kLocal_CoordsType) { |
| GrAssert(kLocal_CoordsType == coordsType || kPosition_CoordsType == coordsType); |
| AutoEffectUnref effect( |
| SkNEW_ARGS(GrSimpleTextureEffect, (tex, matrix, bilerp, coordsType))); |
| return CreateEffectRef(effect); |
| } |
| |
| static GrEffectRef* Create(GrTexture* tex, |
| const SkMatrix& matrix, |
| const GrTextureParams& p, |
| CoordsType coordsType = kLocal_CoordsType) { |
| GrAssert(kLocal_CoordsType == coordsType || kPosition_CoordsType == coordsType); |
| AutoEffectUnref effect(SkNEW_ARGS(GrSimpleTextureEffect, (tex, matrix, p, coordsType))); |
| return CreateEffectRef(effect); |
| } |
| |
| /** Variant that requires the client to install a custom kVec2 vertex attribute that will be |
| the source of the coords. No matrix is allowed in this mode. */ |
| static GrEffectRef* CreateWithCustomCoords(GrTexture* tex, const GrTextureParams& p) { |
| AutoEffectUnref effect(SkNEW_ARGS(GrSimpleTextureEffect, (tex, |
| SkMatrix::I(), |
| p, |
| kCustom_CoordsType))); |
| return CreateEffectRef(effect); |
| } |
| |
| virtual ~GrSimpleTextureEffect() {} |
| |
| static const char* Name() { return "Texture"; } |
| |
| virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE; |
| |
| typedef GrGLSimpleTextureEffect GLEffect; |
| |
| virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE; |
| |
| private: |
| GrSimpleTextureEffect(GrTexture* texture, |
| const SkMatrix& matrix, |
| bool bilerp, |
| CoordsType coordsType) |
| : GrSingleTextureEffect(texture, matrix, bilerp, coordsType) { |
| GrAssert(kLocal_CoordsType == coordsType || kPosition_CoordsType == coordsType); |
| } |
| |
| GrSimpleTextureEffect(GrTexture* texture, |
| const SkMatrix& matrix, |
| const GrTextureParams& params, |
| CoordsType coordsType) |
| : GrSingleTextureEffect(texture, matrix, params, coordsType) { |
| if (kCustom_CoordsType == coordsType) { |
| GrAssert(matrix.isIdentity()); |
| this->addVertexAttrib(kVec2f_GrSLType); |
| } |
| } |
| |
| virtual bool onIsEqual(const GrEffect& other) const SK_OVERRIDE { |
| const GrSimpleTextureEffect& ste = CastEffect<GrSimpleTextureEffect>(other); |
| return this->hasSameTextureParamsMatrixAndCoordsType(ste); |
| } |
| |
| GR_DECLARE_EFFECT_TEST; |
| |
| typedef GrSingleTextureEffect INHERITED; |
| }; |
| |
| #endif |