kc3-lang/angle/src/common/utilities.cpp

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• Hash : 8c788e8d
  Author :
  Date : 2013-05-30T00:20:21
  

  Add support for unsigned integer vector types to the shader translator.
  
  TRAC #23080
  
  Signed-off-by: Nicolas Capens
  Signed-off-by: Shannon Woods
  Author: Jamie Madill
  
  git-svn-id: https://angleproject.googlecode.com/svn/branches/es3proto@2404 736b8ea6-26fd-11df-bfd4-992fa37f6226
  

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• src/common/utilities.cpp

• //
  // Copyright (c) 2002-2013 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.
  //
  
  // utilities.cpp: Conversion functions and other utility routines.
  
  #include "common/utilities.h"
  #include "common/mathutil.h"
  
  #include <set>
  
  namespace gl
  {
  
  int UniformComponentCount(GLenum type)
  {
      switch (type)
      {
        case GL_BOOL:
        case GL_FLOAT:
        case GL_INT:
        case GL_SAMPLER_2D:
        case GL_SAMPLER_CUBE:
        case GL_UNSIGNED_INT:
            return 1;
        case GL_BOOL_VEC2:
        case GL_FLOAT_VEC2:
        case GL_INT_VEC2:
        case GL_UNSIGNED_INT_VEC2:
            return 2;
        case GL_INT_VEC3:
        case GL_FLOAT_VEC3:
        case GL_BOOL_VEC3:
        case GL_UNSIGNED_INT_VEC3:
            return 3;
        case GL_BOOL_VEC4:
        case GL_FLOAT_VEC4:
        case GL_INT_VEC4:
        case GL_UNSIGNED_INT_VEC4:
        case GL_FLOAT_MAT2:
            return 4;
        case GL_FLOAT_MAT2x3:
        case GL_FLOAT_MAT3x2:
            return 6;
        case GL_FLOAT_MAT2x4:
        case GL_FLOAT_MAT4x2:
            return 8;
        case GL_FLOAT_MAT3:
            return 9;
        case GL_FLOAT_MAT3x4:
        case GL_FLOAT_MAT4x3:
            return 12;
        case GL_FLOAT_MAT4:
            return 16;
        default:
            UNREACHABLE();
      }
  
      return 0;
  }
  
  GLenum UniformComponentType(GLenum type)
  {
      switch(type)
      {
        case GL_BOOL:
        case GL_BOOL_VEC2:
        case GL_BOOL_VEC3:
        case GL_BOOL_VEC4:
            return GL_BOOL;
        case GL_FLOAT:
        case GL_FLOAT_VEC2:
        case GL_FLOAT_VEC3:
        case GL_FLOAT_VEC4:
        case GL_FLOAT_MAT2:
        case GL_FLOAT_MAT3:
        case GL_FLOAT_MAT4:
        case GL_FLOAT_MAT2x3:
        case GL_FLOAT_MAT3x2:
        case GL_FLOAT_MAT2x4:
        case GL_FLOAT_MAT4x2:
        case GL_FLOAT_MAT3x4:
        case GL_FLOAT_MAT4x3:
            return GL_FLOAT;
        case GL_INT:
        case GL_SAMPLER_2D:
        case GL_SAMPLER_CUBE:
        case GL_INT_VEC2:
        case GL_INT_VEC3:
        case GL_INT_VEC4:
            return GL_INT;
        case GL_UNSIGNED_INT:
        case GL_UNSIGNED_INT_VEC2:
        case GL_UNSIGNED_INT_VEC3:
        case GL_UNSIGNED_INT_VEC4:
            return GL_UNSIGNED_INT;
        default:
            UNREACHABLE();
      }
  
      return GL_NONE;
  }
  
  size_t UniformComponentSize(GLenum type)
  {
      switch(type)
      {
        case GL_BOOL:         return sizeof(GLint);
        case GL_FLOAT:        return sizeof(GLfloat);
        case GL_INT:          return sizeof(GLint);
        case GL_UNSIGNED_INT: return sizeof(GLuint);
        default:       UNREACHABLE();
      }
  
      return 0;
  }
  
  size_t UniformInternalSize(GLenum type)
  {
      // Expanded to 4-element vectors
      return UniformComponentSize(UniformComponentType(type)) * VariableRowCount(type) * 4;
  }
  
  size_t UniformExternalSize(GLenum type)
  {
      return UniformComponentSize(UniformComponentType(type)) * UniformComponentCount(type);
  }
  
  GLenum UniformBoolVectorType(GLenum type)
  {
      switch (type)
      {
        case GL_FLOAT:
        case GL_INT:
        case GL_UNSIGNED_INT:
          return GL_BOOL;
        case GL_FLOAT_VEC2:
        case GL_INT_VEC2:
        case GL_UNSIGNED_INT_VEC2:
          return GL_BOOL_VEC2;
        case GL_FLOAT_VEC3:
        case GL_INT_VEC3:
        case GL_UNSIGNED_INT_VEC3:
          return GL_BOOL_VEC3;
        case GL_FLOAT_VEC4:
        case GL_INT_VEC4:
        case GL_UNSIGNED_INT_VEC4:
          return GL_BOOL_VEC4;
  
        default:
          UNREACHABLE();
          return GL_NONE;
      }
  }
  
  int VariableRowCount(GLenum type)
  {
      switch (type)
      {
        case GL_NONE:
          return 0;
        case GL_BOOL:
        case GL_FLOAT:
        case GL_INT:
        case GL_UNSIGNED_INT:
        case GL_BOOL_VEC2:
        case GL_FLOAT_VEC2:
        case GL_INT_VEC2:
        case GL_UNSIGNED_INT_VEC2:
        case GL_BOOL_VEC3:
        case GL_FLOAT_VEC3:
        case GL_INT_VEC3:
        case GL_UNSIGNED_INT_VEC3:
        case GL_BOOL_VEC4:
        case GL_FLOAT_VEC4:
        case GL_INT_VEC4:
        case GL_UNSIGNED_INT_VEC4:
        case GL_SAMPLER_2D:
        case GL_SAMPLER_CUBE:
          return 1;
        case GL_FLOAT_MAT2:
        case GL_FLOAT_MAT3x2:
        case GL_FLOAT_MAT4x2:
          return 2;
        case GL_FLOAT_MAT3:
        case GL_FLOAT_MAT2x3:
        case GL_FLOAT_MAT4x3:
          return 3;
        case GL_FLOAT_MAT4:
        case GL_FLOAT_MAT2x4:
        case GL_FLOAT_MAT3x4:
          return 4;
        default:
          UNREACHABLE();
      }
  
      return 0;
  }
  
  int VariableColumnCount(GLenum type)
  {
      switch (type)
      {
        case GL_NONE:
          return 0;
        case GL_BOOL:
        case GL_FLOAT:
        case GL_INT:
        case GL_UNSIGNED_INT:
        case GL_SAMPLER_2D:
        case GL_SAMPLER_CUBE:
          return 1;
        case GL_BOOL_VEC2:
        case GL_FLOAT_VEC2:
        case GL_INT_VEC2:
        case GL_UNSIGNED_INT_VEC2:
        case GL_FLOAT_MAT2:
        case GL_FLOAT_MAT2x3:
        case GL_FLOAT_MAT2x4:
          return 2;
        case GL_BOOL_VEC3:
        case GL_FLOAT_VEC3:
        case GL_INT_VEC3:
        case GL_UNSIGNED_INT_VEC3:
        case GL_FLOAT_MAT3:
        case GL_FLOAT_MAT3x2:
        case GL_FLOAT_MAT3x4:
          return 3;
        case GL_BOOL_VEC4:
        case GL_FLOAT_VEC4:
        case GL_INT_VEC4:
        case GL_UNSIGNED_INT_VEC4:
        case GL_FLOAT_MAT4:
        case GL_FLOAT_MAT4x2:
        case GL_FLOAT_MAT4x3:
          return 4;
        default:
          UNREACHABLE();
      }
  
      return 0;
  }
  
  bool IsMatrixType(GLenum type)
  {
      return VariableRowCount(type) > 1;
  }
  
  GLenum TransposeMatrixType(GLenum type)
  {
      if (!IsMatrixType(type))
      {
          return type;
      }
  
      switch (type)
      {
        case GL_FLOAT_MAT2:   return GL_FLOAT_MAT2;
        case GL_FLOAT_MAT3:   return GL_FLOAT_MAT3;
        case GL_FLOAT_MAT4:   return GL_FLOAT_MAT4;
        case GL_FLOAT_MAT2x3: return GL_FLOAT_MAT3x2;
        case GL_FLOAT_MAT3x2: return GL_FLOAT_MAT2x3;
        case GL_FLOAT_MAT2x4: return GL_FLOAT_MAT4x2;
        case GL_FLOAT_MAT4x2: return GL_FLOAT_MAT2x4;
        case GL_FLOAT_MAT3x4: return GL_FLOAT_MAT4x3;
        case GL_FLOAT_MAT4x3: return GL_FLOAT_MAT3x4;
        default: UNREACHABLE(); return GL_NONE;
      }
  }
  
  int AttributeRegisterCount(GLenum type)
  {
      return IsMatrixType(type) ? VariableColumnCount(type) : 1;
  }
  
  int AllocateFirstFreeBits(unsigned int *bits, unsigned int allocationSize, unsigned int bitsSize)
  {
      ASSERT(allocationSize <= bitsSize);
  
      unsigned int mask = std::numeric_limits<unsigned int>::max() >> (std::numeric_limits<unsigned int>::digits - allocationSize);
  
      for (unsigned int i = 0; i < bitsSize - allocationSize + 1; i++)
      {
          if ((*bits & mask) == 0)
          {
              *bits |= mask;
              return i;
          }
  
          mask <<= 1;
      }
  
      return -1;
  }
  
  bool IsStencilTexture(GLenum format)
  {
      if (format == GL_DEPTH_STENCIL_OES ||
          format == GL_DEPTH24_STENCIL8_OES)
      {
          return true;
      }
  
      return false;
  }
  
  void MakeValidSize(bool isImage, bool isCompressed, GLsizei *requestWidth, GLsizei *requestHeight, int *levelOffset)
  {
      int upsampleCount = 0;
  
      if (isCompressed)
      {
          // Don't expand the size of full textures that are at least 4x4
          // already.
          if (isImage || *requestWidth < 4 || *requestHeight < 4)
          {
              while (*requestWidth % 4 != 0 || *requestHeight % 4 != 0)
              {
                  *requestWidth <<= 1;
                  *requestHeight <<= 1;
                  upsampleCount++;
              }
          }
      }
      *levelOffset = upsampleCount;
  }
  
  // Returns the size, in bytes, of a single texel in an Image
  int ComputePixelSize(GLint internalformat)
  {
      switch (internalformat)
      {
        case GL_ALPHA8_EXT:                       return sizeof(unsigned char);
        case GL_LUMINANCE8_EXT:                   return sizeof(unsigned char);
        case GL_ALPHA32F_EXT:                     return sizeof(float);
        case GL_LUMINANCE32F_EXT:                 return sizeof(float);
        case GL_ALPHA16F_EXT:                     return sizeof(unsigned short);
        case GL_LUMINANCE16F_EXT:                 return sizeof(unsigned short);
        case GL_LUMINANCE8_ALPHA8_EXT:            return sizeof(unsigned char) * 2;
        case GL_LUMINANCE_ALPHA32F_EXT:           return sizeof(float) * 2;
        case GL_LUMINANCE_ALPHA16F_EXT:           return sizeof(unsigned short) * 2;
        case GL_RGB8_OES:                         return sizeof(unsigned char) * 3;
        case GL_RGB565:                           return sizeof(unsigned short);
        case GL_RGB32F_EXT:                       return sizeof(float) * 3;
        case GL_RGB16F_EXT:                       return sizeof(unsigned short) * 3;
        case GL_RGBA8_OES:                        return sizeof(unsigned char) * 4;
        case GL_RGBA4:                            return sizeof(unsigned short);
        case GL_RGB5_A1:                          return sizeof(unsigned short);
        case GL_RGBA32F_EXT:                      return sizeof(float) * 4;
        case GL_RGBA16F_EXT:                      return sizeof(unsigned short) * 4;
        case GL_BGRA8_EXT:                        return sizeof(unsigned char) * 4;
        case GL_SRGB8_ALPHA8:                     return sizeof(unsigned char) * 4;
        case GL_RGB10_A2:                         return sizeof(unsigned char) * 4;
        case GL_RG8:                              return sizeof(unsigned char) * 2;
        case GL_R8:                               return sizeof(unsigned char);
        case GL_BGRA4_ANGLEX:                     return sizeof(unsigned short);
        case GL_BGR5_A1_ANGLEX:                   return sizeof(unsigned short);
        default:
          UNIMPLEMENTED();   // TODO: Remaining ES3 formats
          UNREACHABLE();
      }
  
      return 0;
  }
  
  bool IsCubemapTextureTarget(GLenum target)
  {
      return (target >= GL_TEXTURE_CUBE_MAP_POSITIVE_X && target <= GL_TEXTURE_CUBE_MAP_NEGATIVE_Z);
  }
  
  bool IsInternalTextureTarget(GLenum target)
  {
      return target == GL_TEXTURE_2D || IsCubemapTextureTarget(target);
  }
  
  bool IsTriangleMode(GLenum drawMode)
  {
      switch (drawMode)
      {
        case GL_TRIANGLES:
        case GL_TRIANGLE_FAN:
        case GL_TRIANGLE_STRIP:
          return true;
        case GL_POINTS:
        case GL_LINES:
        case GL_LINE_LOOP:
        case GL_LINE_STRIP:
          return false;
        default: UNREACHABLE();
      }
  
      return false;
  }
  
  }
  
  std::string getTempPath()
  {
      char path[MAX_PATH];
      DWORD pathLen = GetTempPathA(sizeof(path) / sizeof(path[0]), path);
      if (pathLen == 0)
      {
          UNREACHABLE();
          return std::string();
      }
  
      UINT unique = GetTempFileNameA(path, "sh", 0, path);
      if (unique == 0)
      {
          UNREACHABLE();
          return std::string();
      }
  
      return path;
  }
  
  void writeFile(const char* path, const void* content, size_t size)
  {
      FILE* file = fopen(path, "w");
      if (!file)
      {
          UNREACHABLE();
          return;
      }
  
      fwrite(content, sizeof(char), size, file);
      fclose(file);
  }
  

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