Method getSurfaceSize

Engine/source/gfx/bitmap/ddsFile.cpp:117–152

}

U32 DDSFile::getSurfaceSize( U32 height, U32 width, U32 mipLevel ) const 
{
   // Bump by the mip level.
   height = getMax(U32(1), height >> mipLevel);
   width  = getMax(U32(1), width >> mipLevel);

   if(mFlags.test(CompressedData))
   {
      // From the directX docs:
      // max(1, width � 4) x max(1, height � 4) x 8(DXT1) or 16(DXT2-5)

      U32 sizeMultiple = 0;

      switch(mFormat)
      {
      case GFXFormatBC1:
      case GFXFormatBC4:
         sizeMultiple = 8;
         break;
      case GFXFormatBC2:
      case GFXFormatBC3:      
      case GFXFormatBC5:
         sizeMultiple = 16;
         break;
      default:
         AssertISV(false, "DDSFile::getSurfaceSize - invalid compressed texture format, we only support DXT1-5 right now.");
         break;
      }

      return getMax(U32(1), width/4) * getMax(U32(1), height/4) * sizeMultiple;
   }
   else
   {
      return height * width* mBytesPerPixel;
   }
}

U32 DDSFile::getSizeInBytes() const
{