kc3-lang/angle/src/compiler/translator/UtilsHLSL.cpp

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• Author : Jamie Madill
  Date : 2014-07-10 17:50:08
  Hash : d5512cd4
  Message : Collect shader outputs and interface block information. This paves the way for returning ES3-specific info from the shader translator with the new query methods. BUG=angle:466 Change-Id: Ib13cdb604854cdf11e9dc00dd94f18eadc946561 Reviewed-on: https://chromium-review.googlesource.com/206770 Tested-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Zhenyao Mo <zmo@chromium.org>

• src/compiler/translator/UtilsHLSL.cpp

• //
  // Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // UtilsHLSL.cpp:
  //   Utility methods for GLSL to HLSL translation.
  //
  
  #include "compiler/translator/UtilsHLSL.h"
  #include "compiler/translator/StructureHLSL.h"
  #include "compiler/translator/SymbolTable.h"
  
  namespace sh
  {
  
  TString SamplerString(const TType &type)
  {
      if (IsShadowSampler(type.getBasicType()))
      {
          return "SamplerComparisonState";
      }
      else
      {
          return "SamplerState";
      }
  }
  
  TString TextureString(const TType &type)
  {
      switch (type.getBasicType())
      {
        case EbtSampler2D:            return "Texture2D";
        case EbtSamplerCube:          return "TextureCube";
        case EbtSamplerExternalOES:   return "Texture2D";
        case EbtSampler2DArray:       return "Texture2DArray";
        case EbtSampler3D:            return "Texture3D";
        case EbtISampler2D:           return "Texture2D<int4>";
        case EbtISampler3D:           return "Texture3D<int4>";
        case EbtISamplerCube:         return "Texture2DArray<int4>";
        case EbtISampler2DArray:      return "Texture2DArray<int4>";
        case EbtUSampler2D:           return "Texture2D<uint4>";
        case EbtUSampler3D:           return "Texture3D<uint4>";
        case EbtUSamplerCube:         return "Texture2DArray<uint4>";
        case EbtUSampler2DArray:      return "Texture2DArray<uint4>";
        case EbtSampler2DShadow:      return "Texture2D";
        case EbtSamplerCubeShadow:    return "TextureCube";
        case EbtSampler2DArrayShadow: return "Texture2DArray";
        default: UNREACHABLE();
      }
  
      return "<unknown texture type>";
  }
  
  TString DecorateUniform(const TString &string, const TType &type)
  {
      if (type.getBasicType() == EbtSamplerExternalOES)
      {
          return "ex_" + string;
      }
  
      return Decorate(string);
  }
  
  TString DecorateField(const TString &string, const TStructure &structure)
  {
      if (structure.name().compare(0, 3, "gl_") != 0)
      {
          return Decorate(string);
      }
  
      return string;
  }
  
  TString DecoratePrivate(const TString &privateText)
  {
      return "dx_" + privateText;
  }
  
  TString Decorate(const TString &string)
  {
      if (string.compare(0, 3, "gl_") != 0)
      {
          return "_" + string;
      }
  
      return string;
  }
  
  TString TypeString(const TType &type)
  {
      const TStructure* structure = type.getStruct();
      if (structure)
      {
          const TString& typeName = structure->name();
          if (typeName != "")
          {
              return StructNameString(*structure);
          }
          else   // Nameless structure, define in place
          {
              return StructureHLSL::defineNameless(*structure);
          }
      }
      else if (type.isMatrix())
      {
          int cols = type.getCols();
          int rows = type.getRows();
          return "float" + str(cols) + "x" + str(rows);
      }
      else
      {
          switch (type.getBasicType())
          {
            case EbtFloat:
              switch (type.getNominalSize())
              {
                case 1: return "float";
                case 2: return "float2";
                case 3: return "float3";
                case 4: return "float4";
              }
            case EbtInt:
              switch (type.getNominalSize())
              {
                case 1: return "int";
                case 2: return "int2";
                case 3: return "int3";
                case 4: return "int4";
              }
            case EbtUInt:
              switch (type.getNominalSize())
              {
                case 1: return "uint";
                case 2: return "uint2";
                case 3: return "uint3";
                case 4: return "uint4";
              }
            case EbtBool:
              switch (type.getNominalSize())
              {
                case 1: return "bool";
                case 2: return "bool2";
                case 3: return "bool3";
                case 4: return "bool4";
              }
            case EbtVoid:
              return "void";
            case EbtSampler2D:
            case EbtISampler2D:
            case EbtUSampler2D:
            case EbtSampler2DArray:
            case EbtISampler2DArray:
            case EbtUSampler2DArray:
              return "sampler2D";
            case EbtSamplerCube:
            case EbtISamplerCube:
            case EbtUSamplerCube:
              return "samplerCUBE";
            case EbtSamplerExternalOES:
              return "sampler2D";
            default:
              break;
          }
      }
  
      UNREACHABLE();
      return "<unknown type>";
  }
  
  TString StructNameString(const TStructure &structure)
  {
      if (structure.name().empty())
      {
          return "";
      }
  
      return "ss" + str(structure.uniqueId()) + "_" + structure.name();
  }
  
  TString QualifiedStructNameString(const TStructure &structure, bool useHLSLRowMajorPacking,
                                    bool useStd140Packing)
  {
      if (structure.name() == "")
      {
          return "";
      }
  
      TString prefix = "";
  
      // Structs packed with row-major matrices in HLSL are prefixed with "rm"
      // GLSL column-major maps to HLSL row-major, and the converse is true
  
      if (useStd140Packing)
      {
          prefix += "std_";
      }
  
      if (useHLSLRowMajorPacking)
      {
          prefix += "rm_";
      }
  
      return prefix + StructNameString(structure);
  }
  
  TString InterpolationString(TQualifier qualifier)
  {
      switch (qualifier)
      {
        case EvqVaryingIn:           return "";
        case EvqFragmentIn:          return "";
        case EvqInvariantVaryingIn:  return "";
        case EvqSmoothIn:            return "linear";
        case EvqFlatIn:              return "nointerpolation";
        case EvqCentroidIn:          return "centroid";
        case EvqVaryingOut:          return "";
        case EvqVertexOut:           return "";
        case EvqInvariantVaryingOut: return "";
        case EvqSmoothOut:           return "linear";
        case EvqFlatOut:             return "nointerpolation";
        case EvqCentroidOut:         return "centroid";
        default: UNREACHABLE();
      }
  
      return "";
  }
  
  TString QualifierString(TQualifier qualifier)
  {
      switch (qualifier)
      {
        case EvqIn:            return "in";
        case EvqOut:           return "inout"; // 'out' results in an HLSL error if not all fields are written, for GLSL it's undefined
        case EvqInOut:         return "inout";
        case EvqConstReadOnly: return "const";
        default: UNREACHABLE();
      }
  
      return "";
  }
  
  }