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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 GrBicubicTextureEffect_DEFINED
#define GrBicubicTextureEffect_DEFINED
#include "GrSingleTextureEffect.h"
#include "GrDrawEffect.h"
#include "gl/GrGLEffect.h"
#include "GrTBackendEffectFactory.h"
class GrGLBicubicEffect;
class GrBicubicEffect : public GrSingleTextureEffect {
public:
enum {
kFilterTexelPad = 2, // Given a src rect in texels to be filtered, this number of
// surrounding texels are needed by the kernel in x and y.
};
virtual ~GrBicubicEffect();
static const char* Name() { return "Bicubic"; }
const float* coefficients() const { return fCoefficients; }
typedef GrGLBicubicEffect GLEffect;
virtual const GrBackendEffectFactory& getFactory() const SK_OVERRIDE;
virtual void getConstantColorComponents(GrColor* color, uint32_t* validFlags) const SK_OVERRIDE;
static GrEffectRef* Create(GrTexture* tex, const SkScalar coefficients[16]) {
AutoEffectUnref effect(SkNEW_ARGS(GrBicubicEffect, (tex, coefficients)));
return CreateEffectRef(effect);
}
static GrEffectRef* Create(GrTexture* tex, const SkScalar coefficients[16],
const SkMatrix& matrix,
const GrTextureParams& p,
GrCoordSet coordSet = kLocal_GrCoordSet) {
AutoEffectUnref effect(SkNEW_ARGS(GrBicubicEffect, (tex, coefficients, matrix, p, coordSet)));
return CreateEffectRef(effect);
}
static GrEffectRef* Create(GrTexture* tex) {
return Create(tex, gMitchellCoefficients);
}
static GrEffectRef* Create(GrTexture* tex,
const SkMatrix& matrix,
const GrTextureParams& p,
GrCoordSet coordSet = kLocal_GrCoordSet) {
return Create(tex, gMitchellCoefficients, matrix, p, coordSet);
}
private:
GrBicubicEffect(GrTexture*, const SkScalar coefficients[16]);
GrBicubicEffect(GrTexture*, const SkScalar coefficients[16],
const SkMatrix &matrix, const GrTextureParams &p, GrCoordSet coordSet);
virtual bool onIsEqual(const GrEffect&) const SK_OVERRIDE;
float fCoefficients[16];
GR_DECLARE_EFFECT_TEST;
static const SkScalar gMitchellCoefficients[16];
typedef GrSingleTextureEffect INHERITED;
};
#endif
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