src/Shader/SamplerCore.hpp

   1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //    http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 #ifndef sw_SamplerCore_hpp
  16 #define sw_SamplerCore_hpp
  17
  18 #include "PixelRoutine.hpp"
  19 #include "Reactor/Reactor.hpp"
  20
  21 namespace sw
  22 {
  23         enum SamplerMethod
  24         {
  25                 Implicit,
  26                 Bias,
  27                 Lod,
  28                 Grad,
  29                 Fetch
  30         };
  31
  32         enum SamplerOption
  33         {
  34                 None,
  35                 Offset
  36         };
  37
  38         struct SamplerFunction
  39         {
  40                 SamplerFunction(SamplerMethod method, SamplerOption option = None) : method(method), option(option) {}
  41                 operator SamplerMethod() { return method; }
  42
  43                 const SamplerMethod method;
  44                 const SamplerOption option;
  45         };
  46
  47         class SamplerCore
  48         {
  49         public:
  50                 SamplerCore(Pointer<Byte> &r, const Sampler::State &state);
  51
  52                 void sampleTexture(Pointer<Byte> &texture, Vector4s &c, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Vector4f &dsx, Vector4f &dsy);
  53                 void sampleTexture(Pointer<Byte> &texture, Vector4f &c, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Vector4f &dsx, Vector4f &dsy, Vector4f &offset, SamplerFunction function);
  54                 void textureSize(Pointer<Byte> &mipmap, Vector4f &size, Float4 &lod);
  55
  56         private:
  57                 void sampleTexture(Pointer<Byte> &texture, Vector4s &c, Float4 &u, Float4 &v, Float4 &w, Float4 &q, Vector4f &dsx, Vector4f &dsy, Vector4f &offset, SamplerFunction function, bool fixed12);
  58
  59                 void border(Short4 &mask, Float4 &coordinates);
  60                 void border(Int4 &mask, Float4 &coordinates);
  61                 Short4 offsetSample(Short4 &uvw, Pointer<Byte> &mipmap, int halfOffset, bool wrap, int count, Float &lod);
  62                 void sampleFilter(Pointer<Byte> &texture, Vector4s &c, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Float &anisotropy, Float4 &uDelta, Float4 &vDelta, Int face[4], SamplerFunction function);
  63                 void sampleAniso(Pointer<Byte> &texture, Vector4s &c, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Float &anisotropy, Float4 &uDelta, Float4 &vDelta, Int face[4], bool secondLOD, SamplerFunction function);
  64                 void sampleQuad(Pointer<Byte> &texture, Vector4s &c, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Int face[4], bool secondLOD, SamplerFunction function);
  65                 void sampleQuad2D(Pointer<Byte> &texture, Vector4s &c, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Int face[4], bool secondLOD, SamplerFunction function);
  66                 void sample3D(Pointer<Byte> &texture, Vector4s &c, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, bool secondLOD, SamplerFunction function);
  67                 void sampleFloatFilter(Pointer<Byte> &texture, Vector4f &c, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Float &anisotropy, Float4 &uDelta, Float4 &vDelta, Int face[4], SamplerFunction function);
  68                 void sampleFloatAniso(Pointer<Byte> &texture, Vector4f &c, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Float &anisotropy, Float4 &uDelta, Float4 &vDelta, Int face[4], bool secondLOD, SamplerFunction function);
  69                 void sampleFloat(Pointer<Byte> &texture, Vector4f &c, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Int face[4], bool secondLOD, SamplerFunction function);
  70                 void sampleFloat2D(Pointer<Byte> &texture, Vector4f &c, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, Int face[4], bool secondLOD, SamplerFunction function);
  71                 void sampleFloat3D(Pointer<Byte> &texture, Vector4f &c, Float4 &u, Float4 &v, Float4 &w, Vector4f &offset, Float &lod, bool secondLOD, SamplerFunction function);
  72                 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);
  73                 void computeLodCube(Pointer<Byte> &texture, Float &lod, Float4 &x, Float4 &y, Float4 &z, const Float &lodBias, Vector4f &dsx, Vector4f &dsy, SamplerFunction function);
  74                 void computeLod3D(Pointer<Byte> &texture, Float &lod, Float4 &u, Float4 &v, Float4 &w, const Float &lodBias, Vector4f &dsx, Vector4f &dsy, SamplerFunction function);
  75                 void cubeFace(Int face[4], Float4 &U, Float4 &V, Float4 &lodX, Float4 &lodY, Float4 &lodZ, Float4 &x, Float4 &y, Float4 &z);
  76                 Short4 applyOffset(Short4 &uvw, Float4 &offset, const Int4 &whd, AddressingMode mode);
  77                 void computeIndices(UInt index[4], Short4 uuuu, Short4 vvvv, Short4 wwww, Vector4f &offset, const Pointer<Byte> &mipmap, SamplerFunction function);
  78                 void sampleTexel(Vector4s &c, Short4 &u, Short4 &v, Short4 &s, Vector4f &offset, Pointer<Byte> &mipmap, Pointer<Byte> buffer[4], SamplerFunction function);
  79                 void sampleTexel(Vector4s &c, UInt index[4], Pointer<Byte> buffer[4]);
  80                 void sampleTexel(Vector4f &c, Short4 &u, Short4 &v, Short4 &s, Vector4f &offset, Float4 &z, Pointer<Byte> &mipmap, Pointer<Byte> buffer[4], SamplerFunction function);
  81                 void selectMipmap(Pointer<Byte> &texture, Pointer<Byte> buffer[4], Pointer<Byte> &mipmap, Float &lod, Int face[4], bool secondLOD);
  82                 Short4 address(Float4 &uw, AddressingMode addressingMode, Pointer<Byte>& mipmap);
  83
  84                 void convertFixed12(Short4 &ci, Float4 &cf);
  85                 void convertFixed12(Vector4s &cs, Vector4f &cf);
  86                 void convertSigned12(Float4 &cf, Short4 &ci);
  87                 void convertSigned15(Float4 &cf, Short4 &ci);
  88                 void convertUnsigned16(Float4 &cf, Short4 &ci);
  89                 void sRGBtoLinear16_8_12(Short4 &c);
  90                 void sRGBtoLinear16_6_12(Short4 &c);
  91                 void sRGBtoLinear16_5_12(Short4 &c);
  92
  93                 bool hasFloatTexture() const;
  94                 bool hasUnsignedTextureComponent(int component) const;
  95                 int textureComponentCount() const;
  96                 bool has16bitTextureFormat() const;
  97                 bool has8bitTextureComponents() const;
  98                 bool has16bitTextureComponents() const;
  99                 bool hasYuvFormat() const;
 100                 bool isRGBComponent(int component) const;
 101
 102                 Pointer<Byte> &constants;
 103                 const Sampler::State &state;
 104         };
 105 }
 106
 107 #endif   // sw_SamplerCore_hpp