Add a GrCustomCoordsTextureEffect class

src/gpu/effects/GrSimpleTextureEffect.h

 /*
  * 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) {
-        SkASSERT(kLocal_CoordsType == coordsType || kPosition_CoordsType == coordsType);
         AutoEffectUnref effect(SkNEW_ARGS(GrSimpleTextureEffect, (tex, matrix, GrTextureParams::kNone_FilterMode, coordsType)));
         return CreateEffectRef(effect);
     }
 
     /* clamp mode */
     static GrEffectRef* Create(GrTexture* tex,
                                const SkMatrix& matrix,
                                GrTextureParams::FilterMode filterMode,
                                CoordsType coordsType = kLocal_CoordsType) {
-        SkASSERT(kLocal_CoordsType == coordsType || kPosition_CoordsType == coordsType);
         AutoEffectUnref effect(
             SkNEW_ARGS(GrSimpleTextureEffect, (tex, matrix, filterMode, coordsType)));
         return CreateEffectRef(effect);
     }
 
     static GrEffectRef* Create(GrTexture* tex,
                                const SkMatrix& matrix,
                                const GrTextureParams& p,
                                CoordsType coordsType = kLocal_CoordsType) {
-        SkASSERT(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,
                           GrTextureParams::FilterMode filterMode,
                           CoordsType coordsType)
         : GrSingleTextureEffect(texture, matrix, filterMode, coordsType) {
-        SkASSERT(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) {
-            SkASSERT(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