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/*
* 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, GrTextureParams::kNone_FilterMode, coordsType)));
return CreateEffectRef(effect);
}
/* clamp mode */
static GrEffectRef* Create(GrTexture* tex,
const SkMatrix& matrix,
GrTextureParams::FilterMode filterMode,
CoordsType coordsType = kLocal_CoordsType) {
GrAssert(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) {
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,
GrTextureParams::FilterMode filterMode,
CoordsType coordsType)
: GrSingleTextureEffect(texture, matrix, filterMode, 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
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