text: /*
   * Copyright 2016 Google Inc.
   *
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  #ifndef SKSL_CONTEXT
  #define SKSL_CONTEXT
  
  #include "ir/SkSLType.h"
  #include "ir/SkSLExpression.h"
  
  namespace SkSL {
  
  /**
   * Contains compiler-wide objects, which currently means the core types.
   */
  class Context {
  public:
      Context()
      : fInvalid_Type(new Type("<INVALID>"))
      , fVoid_Type(new Type("void"))
      , fDouble_Type(new Type("double", Type::kFloat_NumberKind, 4))
      , fDouble2_Type(new Type("double2", *fDouble_Type, 2))
      , fDouble3_Type(new Type("double3", *fDouble_Type, 3))
      , fDouble4_Type(new Type("double4", *fDouble_Type, 4))
      , fFloat_Type(new Type("float", Type::kFloat_NumberKind, 3))
      , fFloat2_Type(new Type("float2", *fFloat_Type, 2))
      , fFloat3_Type(new Type("float3", *fFloat_Type, 3))
      , fFloat4_Type(new Type("float4", *fFloat_Type, 4))
      , fHalf_Type(new Type("half", Type::kFloat_NumberKind, 2))
      , fHalf2_Type(new Type("half2", *fHalf_Type, 2))
      , fHalf3_Type(new Type("half3", *fHalf_Type, 3))
      , fHalf4_Type(new Type("half4", *fHalf_Type, 4))
      , fUInt_Type(new Type("uint", Type::kUnsigned_NumberKind, 1))
      , fUInt2_Type(new Type("uint2", *fUInt_Type, 2))
      , fUInt3_Type(new Type("uint3", *fUInt_Type, 3))
      , fUInt4_Type(new Type("uint4", *fUInt_Type, 4))
      , fInt_Type(new Type("int", Type::kSigned_NumberKind, 1))
      , fInt2_Type(new Type("int2", *fInt_Type, 2))
      , fInt3_Type(new Type("int3", *fInt_Type, 3))
      , fInt4_Type(new Type("int4", *fInt_Type, 4))
      , fUShort_Type(new Type("ushort", Type::kUnsigned_NumberKind, 0))
      , fUShort2_Type(new Type("ushort2", *fUShort_Type, 2))
      , fUShort3_Type(new Type("ushort3", *fUShort_Type, 3))
      , fUShort4_Type(new Type("ushort4", *fUShort_Type, 4))
      , fShort_Type(new Type("short", Type::kSigned_NumberKind, 0))
      , fShort2_Type(new Type("short2", *fShort_Type, 2))
      , fShort3_Type(new Type("short3", *fShort_Type, 3))
      , fShort4_Type(new Type("short4", *fShort_Type, 4))
      , fBool_Type(new Type("bool", Type::kNonnumeric_NumberKind, -1))
      , fBool2_Type(new Type("bool2", *fBool_Type, 2))
      , fBool3_Type(new Type("bool3", *fBool_Type, 3))
      , fBool4_Type(new Type("bool4", *fBool_Type, 4))
      , fFloat2x2_Type(new Type("float2x2", *fFloat_Type, 2, 2))
      , fFloat2x3_Type(new Type("float2x3", *fFloat_Type, 2, 3))
      , fFloat2x4_Type(new Type("float2x4", *fFloat_Type, 2, 4))
      , fFloat3x2_Type(new Type("float3x2", *fFloat_Type, 3, 2))
      , fFloat3x3_Type(new Type("float3x3", *fFloat_Type, 3, 3))
      , fFloat3x4_Type(new Type("float3x4", *fFloat_Type, 3, 4))
      , fFloat4x2_Type(new Type("float4x2", *fFloat_Type, 4, 2))
      , fFloat4x3_Type(new Type("float4x3", *fFloat_Type, 4, 3))
      , fFloat4x4_Type(new Type("float4x4", *fFloat_Type, 4, 4))
      , fHalf2x2_Type(new Type("half2x2", *fHalf_Type, 2, 2))
      , fHalf2x3_Type(new Type("half2x3", *fHalf_Type, 2, 3))
      , fHalf2x4_Type(new Type("half2x4", *fHalf_Type, 2, 4))
      , fHalf3x2_Type(new Type("half3x2", *fHalf_Type, 3, 2))
      , fHalf3x3_Type(new Type("half3x3", *fHalf_Type, 3, 3))
      , fHalf3x4_Type(new Type("half3x4", *fHalf_Type, 3, 4))
      , fHalf4x2_Type(new Type("half4x2", *fHalf_Type, 4, 2))
      , fHalf4x3_Type(new Type("half4x3", *fHalf_Type, 4, 3))
      , fHalf4x4_Type(new Type("half4x4", *fHalf_Type, 4, 4))
      , fDouble2x2_Type(new Type("double2x2", *fDouble_Type, 2, 2))
      , fDouble2x3_Type(new Type("double2x3", *fDouble_Type, 2, 3))
      , fDouble2x4_Type(new Type("double2x4", *fDouble_Type, 2, 4))
      , fDouble3x2_Type(new Type("double3x2", *fDouble_Type, 3, 2))
      , fDouble3x3_Type(new Type("double3x3", *fDouble_Type, 3, 3))
      , fDouble3x4_Type(new Type("double3x4", *fDouble_Type, 3, 4))
      , fDouble4x2_Type(new Type("double4x2", *fDouble_Type, 4, 2))
      , fDouble4x3_Type(new Type("double4x3", *fDouble_Type, 4, 3))
      , fDouble4x4_Type(new Type("double4x4", *fDouble_Type, 4, 4))
      , fSampler1D_Type(new Type("sampler1D", SpvDim1D, false, false, false, true))
      , fSampler2D_Type(new Type("sampler2D", SpvDim2D, false, false, false, true))
      , fSampler3D_Type(new Type("sampler3D", SpvDim3D, false, false, false, true))
      , fSamplerExternalOES_Type(new Type("samplerExternalOES", SpvDim2D, false, false,
                                          false, true))
      , fSamplerCube_Type(new Type("samplerCube", SpvDimCube, false, false, false, true))
      , fSampler2DRect_Type(new Type("sampler2DRect", SpvDimRect, false, false, false, true))
      , fSampler1DArray_Type(new Type("sampler1DArray"))
      , fSampler2DArray_Type(new Type("sampler2DArray"))
      , fSamplerCubeArray_Type(new Type("samplerCubeArray"))
      , fSamplerBuffer_Type(new Type("samplerBuffer", SpvDimBuffer, false, false, false,
                                     true))
      , fSampler2DMS_Type(new Type("sampler2DMS"))
      , fSampler2DMSArray_Type(new Type("sampler2DMSArray"))
      , fSampler1DShadow_Type(new Type("sampler1DShadow"))
      , fSampler2DShadow_Type(new Type("sampler2DShadow"))
      , fSamplerCubeShadow_Type(new Type("samplerCubeShadow"))
      , fSampler2DRectShadow_Type(new Type("sampler2DRectShadow"))
      , fSampler1DArrayShadow_Type(new Type("sampler1DArrayShadow"))
      , fSampler2DArrayShadow_Type(new Type("sampler2DArrayShadow"))
      , fSamplerCubeArrayShadow_Type(new Type("samplerCubeArrayShadow"))
  
      // Related to below FIXME, gsampler*s don't currently expand to cover integer case.
      , fISampler2D_Type(new Type("isampler2D", SpvDim2D, false, false, false, true))
  
      // FIXME express these as "gimage2D" that expand to image2D, iimage2D, and uimage2D.
      , fImage2D_Type(new Type("image2D", SpvDim2D, false, false, false, true))
      , fIImage2D_Type(new Type("iimage2D", SpvDim2D, false, false, false, true))
  
      // FIXME express these as "gsubpassInput" that expand to subpassInput, isubpassInput,
      // and usubpassInput.
      , fSubpassInput_Type(new Type("subpassInput", SpvDimSubpassData, false, false,
                                    false, false))
      , fSubpassInputMS_Type(new Type("subpassInputMS", SpvDimSubpassData, false, false,
                                      true, false))
  
      // FIXME figure out what we're supposed to do with the gsampler et al. types)
      , fGSampler1D_Type(new Type("$gsampler1D", static_type(*fSampler1D_Type)))
      , fGSampler2D_Type(new Type("$gsampler2D", static_type(*fSampler2D_Type)))
      , fGSampler3D_Type(new Type("$gsampler3D", static_type(*fSampler3D_Type)))
      , fGSamplerCube_Type(new Type("$gsamplerCube", static_type(*fSamplerCube_Type)))
      , fGSampler2DRect_Type(new Type("$gsampler2DRect", static_type(*fSampler2DRect_Type)))
      , fGSampler1DArray_Type(new Type("$gsampler1DArray",
                                       static_type(*fSampler1DArray_Type)))
      , fGSampler2DArray_Type(new Type("$gsampler2DArray",
                                       static_type(*fSampler2DArray_Type)))
      , fGSamplerCubeArray_Type(new Type("$gsamplerCubeArray",
                                         static_type(*fSamplerCubeArray_Type)))
      , fGSamplerBuffer_Type(new Type("$gsamplerBuffer", static_type(*fSamplerBuffer_Type)))
      , fGSampler2DMS_Type(new Type("$gsampler2DMS", static_type(*fSampler2DMS_Type)))
      , fGSampler2DMSArray_Type(new Type("$gsampler2DMSArray",
                                         static_type(*fSampler2DMSArray_Type)))
      , fGSampler2DArrayShadow_Type(new Type("$gsampler2DArrayShadow",
                                             static_type(*fSampler2DArrayShadow_Type)))
      , fGSamplerCubeArrayShadow_Type(new Type("$gsamplerCubeArrayShadow",
                                               static_type(*fSamplerCubeArrayShadow_Type)))
      , fGenType_Type(new Type("$genType", { fFloat_Type.get(), fFloat2_Type.get(),
                                             fFloat3_Type.get(), fFloat4_Type.get() }))
      , fGenHType_Type(new Type("$genHType", { fHalf_Type.get(), fHalf2_Type.get(),
                                               fHalf3_Type.get(), fHalf4_Type.get() }))
      , fGenDType_Type(new Type("$genDType", { fDouble_Type.get(), fDouble2_Type.get(),
                                               fDouble3_Type.get(), fDouble4_Type.get() }))
      , fGenIType_Type(new Type("$genIType", { fInt_Type.get(), fInt2_Type.get(),
                                               fInt3_Type.get(), fInt4_Type.get() }))
      , fGenUType_Type(new Type("$genUType", { fUInt_Type.get(), fUInt2_Type.get(),
                                               fUInt3_Type.get(), fUInt4_Type.get() }))
      , fGenBType_Type(new Type("$genBType", { fBool_Type.get(), fBool2_Type.get(),
                                               fBool3_Type.get(), fBool4_Type.get() }))
      , fMat_Type(new Type("$mat", { fFloat2x2_Type.get(),  fFloat2x3_Type.get(),
                                     fFloat2x4_Type.get(),  fFloat3x2_Type.get(),
                                     fFloat3x3_Type.get(),  fFloat3x4_Type.get(),
                                     fFloat4x2_Type.get(),  fFloat4x3_Type.get(),
                                     fFloat4x4_Type.get(),  fHalf2x2_Type.get(),
                                     fHalf2x3_Type.get(),   fHalf2x4_Type.get(),
                                     fHalf3x2_Type.get(),   fHalf3x3_Type.get(),
                                     fHalf3x4_Type.get(),   fHalf4x2_Type.get(),
                                     fHalf4x3_Type.get(),   fHalf4x4_Type.get(),
                                     fDouble2x2_Type.get(), fDouble2x3_Type.get(),
                                     fDouble2x4_Type.get(), fDouble3x2_Type.get(),
                                     fDouble3x3_Type.get(), fDouble3x4_Type.get(),
                                     fDouble4x2_Type.get(), fDouble4x3_Type.get(),
                                     fDouble4x4_Type.get() }))
      , fVec_Type(new Type("$vec", { fInvalid_Type.get(), fFloat2_Type.get(),
                                             fFloat3_Type.get(), fFloat4_Type.get() }))
      , fGVec_Type(new Type("$gvec"))
      , fGVec2_Type(new Type("$gfloat2"))
      , fGVec3_Type(new Type("$gfloat3"))
      , fGVec4_Type(new Type("$gfloat4", static_type(*fFloat4_Type)))
      , fHVec_Type(new Type("$hvec", { fInvalid_Type.get(), fHalf2_Type.get(),
                                       fHalf3_Type.get(), fHalf4_Type.get() }))
      , fDVec_Type(new Type("$dvec", { fInvalid_Type.get(), fDouble2_Type.get(),
                                       fDouble3_Type.get(), fDouble4_Type.get() }))
      , fIVec_Type(new Type("$ivec", { fInvalid_Type.get(), fInt2_Type.get(),
                                       fInt3_Type.get(), fInt4_Type.get() }))
      , fUVec_Type(new Type("$uvec", { fInvalid_Type.get(), fUInt2_Type.get(),
                                       fUInt3_Type.get(), fUInt4_Type.get() }))
      , fSVec_Type(new Type("$svec", { fInvalid_Type.get(), fShort2_Type.get(),
                                       fShort3_Type.get(), fShort4_Type.get() }))
      , fUSVec_Type(new Type("$usvec", { fInvalid_Type.get(), fUShort2_Type.get(),
                                         fUShort3_Type.get(), fUShort4_Type.get() }))
      , fBVec_Type(new Type("$bvec", { fInvalid_Type.get(), fBool2_Type.get(),
                                       fBool3_Type.get(), fBool4_Type.get() }))
      , fSkCaps_Type(new Type("$sk_Caps"))
      , fSkArgs_Type(new Type("$sk_Args"))
      , fColorSpaceXform_Type(new Type("colorSpaceXform", *fFloat_Type, 4, 4))
      , fFragmentProcessor_Type(new Type("fragmentProcessor"))
      , fDefined_Expression(new Defined(*fInvalid_Type)) {}
  
      static std::vector<const Type*> static_type(const Type& t) {
          return { &t, &t, &t, &t };
      }
  
      const std::unique_ptr<Type> fInvalid_Type;
      const std::unique_ptr<Type> fVoid_Type;
  
      const std::unique_ptr<Type> fDouble_Type;
      const std::unique_ptr<Type> fDouble2_Type;
      const std::unique_ptr<Type> fDouble3_Type;
      const std::unique_ptr<Type> fDouble4_Type;
  
      const std::unique_ptr<Type> fFloat_Type;
      const std::unique_ptr<Type> fFloat2_Type;
      const std::unique_ptr<Type> fFloat3_Type;
      const std::unique_ptr<Type> fFloat4_Type;
  
      const std::unique_ptr<Type> fHalf_Type;
      const std::unique_ptr<Type> fHalf2_Type;
      const std::unique_ptr<Type> fHalf3_Type;
      const std::unique_ptr<Type> fHalf4_Type;
  
      const std::unique_ptr<Type> fUInt_Type;
      const std::unique_ptr<Type> fUInt2_Type;
      const std::unique_ptr<Type> fUInt3_Type;
      const std::unique_ptr<Type> fUInt4_Type;
  
      const std::unique_ptr<Type> fInt_Type;
      const std::unique_ptr<Type> fInt2_Type;
      const std::unique_ptr<Type> fInt3_Type;
      const std::unique_ptr<Type> fInt4_Type;
  
      const std::unique_ptr<Type> fUShort_Type;
      const std::unique_ptr<Type> fUShort2_Type;
      const std::unique_ptr<Type> fUShort3_Type;
      const std::unique_ptr<Type> fUShort4_Type;
  
      const std::unique_ptr<Type> fShort_Type;
      const std::unique_ptr<Type> fShort2_Type;
      const std::unique_ptr<Type> fShort3_Type;
      const std::unique_ptr<Type> fShort4_Type;
  
      const std::unique_ptr<Type> fBool_Type;
      const std::unique_ptr<Type> fBool2_Type;
      const std::unique_ptr<Type> fBool3_Type;
      const std::unique_ptr<Type> fBool4_Type;
  
      const std::unique_ptr<Type> fFloat2x2_Type;
      const std::unique_ptr<Type> fFloat2x3_Type;
      const std::unique_ptr<Type> fFloat2x4_Type;
      const std::unique_ptr<Type> fFloat3x2_Type;
      const std::unique_ptr<Type> fFloat3x3_Type;
      const std::unique_ptr<Type> fFloat3x4_Type;
      const std::unique_ptr<Type> fFloat4x2_Type;
      const std::unique_ptr<Type> fFloat4x3_Type;
      const std::unique_ptr<Type> fFloat4x4_Type;
  
      const std::unique_ptr<Type> fHalf2x2_Type;
      const std::unique_ptr<Type> fHalf2x3_Type;
      const std::unique_ptr<Type> fHalf2x4_Type;
      const std::unique_ptr<Type> fHalf3x2_Type;
      const std::unique_ptr<Type> fHalf3x3_Type;
      const std::unique_ptr<Type> fHalf3x4_Type;
      const std::unique_ptr<Type> fHalf4x2_Type;
      const std::unique_ptr<Type> fHalf4x3_Type;
      const std::unique_ptr<Type> fHalf4x4_Type;
  
      const std::unique_ptr<Type> fDouble2x2_Type;
      const std::unique_ptr<Type> fDouble2x3_Type;
      const std::unique_ptr<Type> fDouble2x4_Type;
      const std::unique_ptr<Type> fDouble3x2_Type;
      const std::unique_ptr<Type> fDouble3x3_Type;
      const std::unique_ptr<Type> fDouble3x4_Type;
      const std::unique_ptr<Type> fDouble4x2_Type;
      const std::unique_ptr<Type> fDouble4x3_Type;
      const std::unique_ptr<Type> fDouble4x4_Type;
  
      const std::unique_ptr<Type> fSampler1D_Type;
      const std::unique_ptr<Type> fSampler2D_Type;
      const std::unique_ptr<Type> fSampler3D_Type;
      const std::unique_ptr<Type> fSamplerExternalOES_Type;
      const std::unique_ptr<Type> fSamplerCube_Type;
      const std::unique_ptr<Type> fSampler2DRect_Type;
      const std::unique_ptr<Type> fSampler1DArray_Type;
      const std::unique_ptr<Type> fSampler2DArray_Type;
      const std::unique_ptr<Type> fSamplerCubeArray_Type;
      const std::unique_ptr<Type> fSamplerBuffer_Type;
      const std::unique_ptr<Type> fSampler2DMS_Type;
      const std::unique_ptr<Type> fSampler2DMSArray_Type;
      const std::unique_ptr<Type> fSampler1DShadow_Type;
      const std::unique_ptr<Type> fSampler2DShadow_Type;
      const std::unique_ptr<Type> fSamplerCubeShadow_Type;
      const std::unique_ptr<Type> fSampler2DRectShadow_Type;
      const std::unique_ptr<Type> fSampler1DArrayShadow_Type;
      const std::unique_ptr<Type> fSampler2DArrayShadow_Type;
      const std::unique_ptr<Type> fSamplerCubeArrayShadow_Type;
  
      const std::unique_ptr<Type> fISampler2D_Type;
  
      const std::unique_ptr<Type> fImage2D_Type;
      const std::unique_ptr<Type> fIImage2D_Type;
  
      const std::unique_ptr<Type> fSubpassInput_Type;
      const std::unique_ptr<Type> fSubpassInputMS_Type;
  
      const std::unique_ptr<Type> fGSampler1D_Type;
      const std::unique_ptr<Type> fGSampler2D_Type;
      const std::unique_ptr<Type> fGSampler3D_Type;
      const std::unique_ptr<Type> fGSamplerCube_Type;
      const std::unique_ptr<Type> fGSampler2DRect_Type;
      const std::unique_ptr<Type> fGSampler1DArray_Type;
      const std::unique_ptr<Type> fGSampler2DArray_Type;
      const std::unique_ptr<Type> fGSamplerCubeArray_Type;
      const std::unique_ptr<Type> fGSamplerBuffer_Type;
      const std::unique_ptr<Type> fGSampler2DMS_Type;
      const std::unique_ptr<Type> fGSampler2DMSArray_Type;
      const std::unique_ptr<Type> fGSampler2DArrayShadow_Type;
      const std::unique_ptr<Type> fGSamplerCubeArrayShadow_Type;
  
      const std::unique_ptr<Type> fGenType_Type;
      const std::unique_ptr<Type> fGenHType_Type;
      const std::unique_ptr<Type> fGenDType_Type;
      const std::unique_ptr<Type> fGenIType_Type;
      const std::unique_ptr<Type> fGenUType_Type;
      const std::unique_ptr<Type> fGenBType_Type;
  
      const std::unique_ptr<Type> fMat_Type;
  
      const std::unique_ptr<Type> fVec_Type;
  
      const std::unique_ptr<Type> fGVec_Type;
      const std::unique_ptr<Type> fGVec2_Type;
      const std::unique_ptr<Type> fGVec3_Type;
      const std::unique_ptr<Type> fGVec4_Type;
      const std::unique_ptr<Type> fHVec_Type;
      const std::unique_ptr<Type> fDVec_Type;
      const std::unique_ptr<Type> fIVec_Type;
      const std::unique_ptr<Type> fUVec_Type;
      const std::unique_ptr<Type> fSVec_Type;
      const std::unique_ptr<Type> fUSVec_Type;
  
      const std::unique_ptr<Type> fBVec_Type;
  
      const std::unique_ptr<Type> fSkCaps_Type;
      const std::unique_ptr<Type> fSkArgs_Type;
      const std::unique_ptr<Type> fColorSpaceXform_Type;
      const std::unique_ptr<Type> fFragmentProcessor_Type;
  
      // dummy expression used to mark that a variable has a value during dataflow analysis (when it
      // could have several different values, or the analyzer is otherwise unable to assign it a
      // specific expression)
      const std::unique_ptr<Expression> fDefined_Expression;
  
  private:
      class Defined : public Expression {
      public:
          Defined(const Type& type)
          : INHERITED(-1, kDefined_Kind, type) {}
  
          bool hasSideEffects() const override {
              return false;
          }
  
          String description() const override {
              return "<defined>";
          }
  
          typedef Expression INHERITED;
      };
  };
  
  } // namespace
  
  #endif
  