Function MakeResourceFormat

renderdoc/driver/gl/gl_common.cpp:1941–2391

}

ResourceFormat MakeResourceFormat(GLenum target, GLenum fmt)
{
  ResourceFormat ret;

  ret.type = ResourceFormatType::Regular;

  if(fmt == eGL_NONE)
  {
    ret.type = ResourceFormatType::Undefined;
    return ret;
  }

  // special handling for formats that don't query neatly
  if(fmt == eGL_LUMINANCE8_EXT || fmt == eGL_INTENSITY8_EXT || fmt == eGL_LUMINANCE)
  {
    ret.compByteWidth = 1;
    ret.compCount = 1;
    ret.compType = CompType::UNorm;
    return ret;
  }
  else if(fmt == eGL_ALPHA || fmt == eGL_ALPHA8_EXT)
  {
    ret.compByteWidth = 1;
    ret.compCount = 1;
    ret.compType = CompType::UNorm;
    ret.type = ResourceFormatType::A8;
    return ret;
  }
  else if(fmt == eGL_LUMINANCE8_ALPHA8_EXT || fmt == eGL_LUMINANCE_ALPHA)
  {
    ret.compByteWidth = 1;
    ret.compCount = 2;
    ret.compType = CompType::UNorm;
    return ret;
  }
  else if(fmt == eGL_RGBA2)
  {
    // pretend it's RGBA8 and hope for the best
    ret.compByteWidth = 1;
    ret.compCount = 4;
    ret.compType = CompType::UNorm;
    return ret;
  }

  if(IsCompressedFormat(fmt))
  {
    switch(fmt)
    {
      // BC1
      case eGL_COMPRESSED_RGB_S3TC_DXT1_EXT:
      case eGL_COMPRESSED_SRGB_S3TC_DXT1_EXT: ret.compCount = 3; break;
      case eGL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
      case eGL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT: ret.compCount = 4; break;

      // BC2
      case eGL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
      case eGL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT: ret.compCount = 4; break;