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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrSamplerParams_DEFINED
#define GrSamplerParams_DEFINED
#include "GrTypes.h"
#include "SkShader.h"
/**
* Represents the filtering and tile modes used to access a texture.
*/
class GrSamplerParams {
public:
static const GrSamplerParams& ClampNoFilter() {
static const GrSamplerParams gParams;
return gParams;
}
static const GrSamplerParams& ClampBilerp() {
static const GrSamplerParams gParams(SkShader::kClamp_TileMode, kBilerp_FilterMode);
return gParams;
}
GrSamplerParams() {
this->reset();
}
enum FilterMode {
kNone_FilterMode,
kBilerp_FilterMode,
kMipMap_FilterMode
};
GrSamplerParams(SkShader::TileMode tileXAndY, FilterMode filterMode) {
this->reset(tileXAndY, filterMode);
}
GrSamplerParams(const SkShader::TileMode tileModes[2], FilterMode filterMode) {
this->reset(tileModes, filterMode);
}
GrSamplerParams(const GrSamplerParams& params) {
*this = params;
}
GrSamplerParams& operator= (const GrSamplerParams& params) {
fTileModes[0] = params.fTileModes[0];
fTileModes[1] = params.fTileModes[1];
fFilterMode = params.fFilterMode;
return *this;
}
void reset() {
this->reset(SkShader::kClamp_TileMode, kNone_FilterMode);
}
void reset(SkShader::TileMode tileXAndY, FilterMode filterMode) {
fTileModes[0] = fTileModes[1] = tileXAndY;
fFilterMode = filterMode;
}
void reset(const SkShader::TileMode tileModes[2], FilterMode filterMode) {
fTileModes[0] = tileModes[0];
fTileModes[1] = tileModes[1];
fFilterMode = filterMode;
}
void setClampNoFilter() {
fTileModes[0] = fTileModes[1] = SkShader::kClamp_TileMode;
fFilterMode = kNone_FilterMode;
}
void setClamp() {
fTileModes[0] = fTileModes[1] = SkShader::kClamp_TileMode;
}
void setFilterMode(FilterMode filterMode) { fFilterMode = filterMode; }
void setTileModeX(const SkShader::TileMode tm) { fTileModes[0] = tm; }
void setTileModeY(const SkShader::TileMode tm) { fTileModes[1] = tm; }
void setTileModeXAndY(const SkShader::TileMode tm) { fTileModes[0] = fTileModes[1] = tm; }
SkShader::TileMode getTileModeX() const { return fTileModes[0]; }
SkShader::TileMode getTileModeY() const { return fTileModes[1]; }
bool isTiled() const {
return SkShader::kClamp_TileMode != fTileModes[0] ||
SkShader::kClamp_TileMode != fTileModes[1];
}
FilterMode filterMode() const { return fFilterMode; }
bool operator== (const GrSamplerParams& other) const {
return fTileModes[0] == other.fTileModes[0] &&
fTileModes[1] == other.fTileModes[1] &&
fFilterMode == other.fFilterMode;
}
bool operator!= (const GrSamplerParams& other) const { return !(*this == other); }
private:
SkShader::TileMode fTileModes[2];
FilterMode fFilterMode;
};
#endif
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