Method read

Engine/source/gfx/bitmap/ddsFile.cpp:369–439

}

bool DDSFile::read(Stream &s, U32 dropMipCount)
{
   if( !readHeader(s) )
   {
      Con::errorf("DDSFile::read - error reading header!");
      return false;
   }

   // If we're droping mips then make sure we have enough.
   dropMipCount = getMin( dropMipCount, mMipMapCount - 1 );

   // At this point we know what sort of image we contain. So we should
   // allocate some buffers, and read it in.

   // How many surfaces are we talking about?
   if(mFlags.test(CubeMapFlag))
   {
      mSurfaces.setSize( Cubemap_Surface_Count );

      for ( U32 i=0; i < Cubemap_Surface_Count; i++ )
      {
         // Does the cubemap contain this surface?
         if ( mFlags.test( CubeMap_PosX_Flag + ( i << 1 ) ) )
            mSurfaces[i] = new SurfaceData();
         else
         {
            mSurfaces[i] = NULL;
            continue;
         }

         // Load all the mips.
         for(S32 mip=0; mip<mMipMapCount; mip++)
            mSurfaces[i]->readNextMip(this, s, mHeight, mWidth, mip, mip < dropMipCount );
      }

   }
   else if (mFlags.test(VolumeFlag))
   {
      // Do something with volume
   }
   else
   {
      // It's a plain old texture.

      // First allocate a SurfaceData to stick this in.
      mSurfaces.push_back(new SurfaceData());

      // Load however many mips there are.
      for(S32 i=0; i<mMipMapCount; i++)
         mSurfaces.last()->readNextMip(this, s, mHeight, mWidth, i, i < dropMipCount);

      // Ok, we're done.
   }

   // If we're dropping mips then fix up the stats.
   if ( dropMipCount > 0 )
   {
      // Fix up the pitch and/or linear size.