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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 GrSamplerState_DEFINED
#define GrSamplerState_DEFINED
#include "GrTypes.h"
/**
* Represents the filtering and tile modes used to access a texture.
*/
class GrSamplerState {
public:
enum class Filter : uint8_t { kNearest, kBilerp, kMipMap };
enum class WrapMode : uint8_t { kClamp, kRepeat, kMirrorRepeat };
static constexpr GrSamplerState ClampNearest() { return GrSamplerState(); }
static constexpr GrSamplerState ClampBilerp() {
return GrSamplerState(WrapMode::kClamp, Filter::kBilerp);
}
constexpr GrSamplerState() : GrSamplerState(WrapMode::kClamp, Filter::kNearest) {}
constexpr GrSamplerState(WrapMode wrapXAndY, Filter filter)
: fWrapModes{wrapXAndY, wrapXAndY}, fFilter(filter) {}
constexpr GrSamplerState(const WrapMode wrapModes[2], Filter filter)
: fWrapModes{wrapModes[0], wrapModes[1]}, fFilter(filter) {}
constexpr GrSamplerState(const GrSamplerState&) = default;
GrSamplerState& operator=(const GrSamplerState& that) {
fWrapModes[0] = that.fWrapModes[0];
fWrapModes[1] = that.fWrapModes[1];
fFilter = that.fFilter;
return *this;
}
Filter filter() const { return fFilter; }
void setFilterMode(Filter filterMode) { fFilter = filterMode; }
void setWrapModeX(const WrapMode wrap) { fWrapModes[0] = wrap; }
void setWrapModeY(const WrapMode wrap) { fWrapModes[1] = wrap; }
WrapMode wrapModeX() const { return fWrapModes[0]; }
WrapMode wrapModeY() const { return fWrapModes[1]; }
bool isRepeated() const {
return WrapMode::kClamp != fWrapModes[0] || WrapMode::kClamp != fWrapModes[1];
}
bool operator==(const GrSamplerState& that) const {
return fWrapModes[0] == that.fWrapModes[0] && fWrapModes[1] == that.fWrapModes[1] &&
fFilter == that.fFilter;
}
bool operator!=(const GrSamplerState& that) const { return !(*this == that); }
private:
WrapMode fWrapModes[2];
Filter fFilter;
};
#endif
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