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// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef sw_SamplerCore_hpp
#define sw_SamplerCore_hpp
#include "PixelRoutine.hpp"
#include "Reactor/Reactor.hpp"
namespace sw
{
enum SamplerMethod
{
Implicit, // Compute gradients (pixel shader only).
Bias, // Compute gradients and add provided bias.
Lod, // Use provided LOD.
Grad, // Use provided gradients.
Fetch, // Use provided integer coordinates.
Base // Sample base level.
};
enum SamplerOption
{
None,
Offset // Offset sample location by provided integer coordinates.
};
struct SamplerFunction
{
SamplerFunction(SamplerMethod method, SamplerOption option = None) : method(method), option(option) {}
operator SamplerMethod() { return method; }
const SamplerMethod method;
const SamplerOption option;
};
class SamplerCore
{
public:
SamplerCore(Pointer<Byte> &constants, const Sampler::State &state);
Vector4s sampleTexture(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Float4 &bias, Vector4f &dsx, Vector4f &dsy);
Vector4f sampleTexture(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Float4 &bias, Vector4f &dsx, Vector4f &dsy, Vector4f &offset, SamplerFunction function);
static Vector4f textureSize(Pointer<Byte> &mipmap, Float4 &lod);
private:
Vector4s sampleTexture(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Float4 &bias, Vector4f &dsx, Vector4f &dsy, Vector4f &offset, SamplerFunction function, bool fixed12);
void border(Short4 &mask, Float4 &coordinates);
void border(Int4 &mask, Float4 &coordinates);
Short4 offsetSample(Short4 &uvw, Pointer<Byte> &mipmap, int halfOffset, bool wrap, int count, Float &lod);
Vector4s sampleFilter(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Float &anisotropy, Float4 &uDelta, Float4 &vDelta, Int face[4], SamplerFunction function);
Vector4s sampleAniso(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Float &anisotropy, Float4 &uDelta, Float4 &vDelta, Int face[4], bool secondLOD, SamplerFunction function);
Vector4s sampleQuad(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Int face[4], bool secondLOD, SamplerFunction function);
Vector4s sampleQuad2D(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Int face[4], bool secondLOD, SamplerFunction function);
Vector4s sample3D(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, bool secondLOD, SamplerFunction function);
Vector4f sampleFloatFilter(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Vector4f &offset, Float &lod, Float &anisotropy, Float4 &uDelta, Float4 &vDelta, Int face[4], SamplerFunction function);
Vector4f sampleFloatAniso(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Vector4f &offset, Float &lod, Float &anisotropy, Float4 &uDelta, Float4 &vDelta, Int face[4], bool secondLOD, SamplerFunction function);
Vector4f sampleFloat(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Vector4f &offset, Float &lod, Int face[4], bool secondLOD, SamplerFunction function);
Vector4f sampleFloat2D(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Vector4f &offset, Float &lod, Int face[4], bool secondLOD, SamplerFunction function);
Vector4f sampleFloat3D(Pointer<Byte> &texture, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, bool secondLOD, SamplerFunction function);
Float log2sqrt(Float lod);
Float log2(Float lod);
void computeLod(Pointer<Byte> &texture, Float &lod, Float &anisotropy, Float4 &uDelta, Float4 &vDelta, Float4 &u, Float4 &v, const Float &lodBias, Vector4f &dsx, Vector4f &dsy, SamplerFunction function);
void computeLodCube(Pointer<Byte> &texture, Float &lod, Float4 &u, Float4 &v, Float4 &w, const Float &lodBias, Vector4f &dsx, Vector4f &dsy, Float4 &M, SamplerFunction function);
void computeLod3D(Pointer<Byte> &texture, Float &lod, Float4 &u, Float4 &v, Float4 &w, const Float &lodBias, Vector4f &dsx, Vector4f &dsy, SamplerFunction function);
void cubeFace(Int face[4], Float4 &U, Float4 &V, Float4 &x, Float4 &y, Float4 &z, Float4 &M);
Short4 applyOffset(Short4 &uvw, Float4 &offset, const Int4 &whd, AddressingMode mode);
void computeIndices(UInt index[4], Short4 uuuu, Short4 vvvv, Short4 wwww, Vector4f &offset, const Pointer<Byte> &mipmap, SamplerFunction function);
void computeIndices(UInt index[4], Int4& uuuu, Int4& vvvv, Int4& wwww, const Pointer<Byte> &mipmap, SamplerFunction function);
Vector4s sampleTexel(Short4 &u, Short4 &v, Short4 &s, Vector4f &offset, Pointer<Byte> &mipmap, Pointer<Byte> buffer[4], SamplerFunction function);
Vector4s sampleTexel(UInt index[4], Pointer<Byte> buffer[4]);
Vector4f sampleTexel(Int4 &u, Int4 &v, Int4 &s, Float4 &z, Pointer<Byte> &mipmap, Pointer<Byte> buffer[4], SamplerFunction function);
void selectMipmap(Pointer<Byte> &texture, Pointer<Byte> buffer[4], Pointer<Byte> &mipmap, Float &lod, Int face[4], bool secondLOD);
Short4 address(Float4 &uw, AddressingMode addressingMode, Pointer<Byte>& mipmap);
void address(Float4 &uw, Int4& xyz0, Int4& xyz1, Float4& f, Pointer<Byte>& mipmap, Float4 &texOffset, Int4 &filter, int whd, AddressingMode addressingMode, SamplerFunction function);
Int4 computeFilterOffset(Float &lod);
void convertFixed12(Short4 &ci, Float4 &cf);
void convertFixed12(Vector4s &cs, Vector4f &cf);
void convertSigned12(Float4 &cf, Short4 &ci);
void convertSigned15(Float4 &cf, Short4 &ci);
void convertUnsigned16(Float4 &cf, Short4 &ci);
void sRGBtoLinear16_8_16(Short4 &c);
void sRGBtoLinear16_6_16(Short4 &c);
void sRGBtoLinear16_5_16(Short4 &c);
bool hasFloatTexture() const;
bool hasUnnormalizedIntegerTexture() const;
bool hasUnsignedTextureComponent(int component) const;
int textureComponentCount() const;
bool hasThirdCoordinate() const;
bool has16bitTextureFormat() const;
bool has8bitTextureComponents() const;
bool has16bitTextureComponents() const;
bool has32bitIntegerTextureComponents() const;
bool hasYuvFormat() const;
bool isRGBComponent(int component) const;
Pointer<Byte> &constants;
const Sampler::State &state;
};
}
#endif // sw_SamplerCore_hpp