public override void BlitToMemory( BasicBox srcBox, PixelBox dst )
{
// Decide on pixel format of temp surface
PixelFormat tmpFormat = Format;
if ( D3DHelper.ConvertEnum( dst.Format ) == D3D.Format.Unknown )
tmpFormat = dst.Format;
if ( surface != null )
{
Debug.Assert( srcBox.Depth == 1 && dst.Depth == 1 );
// Create temp texture
D3D.Texture tmp =
new D3D.Texture( device, dst.Width, dst.Height,
1, // 1 mip level ie topmost, generate no mipmaps
0, D3DHelper.ConvertEnum( tmpFormat ),
D3D.Pool.Scratch );
D3D.Surface subSurface = tmp.GetSurfaceLevel( 0 );
// Copy texture to this temp surface
System.Drawing.Rectangle destRect, srcRect;
srcRect = ToD3DRectangle( srcBox );
destRect = ToD3DRectangleExtent( dst );
D3D.Surface.FromSurface( subSurface, surface, D3D.Filter.None, 0, srcRect, destRect );
// Lock temp surface and copy it to memory
int pitch; // Filled in by D3D
DX.DataRectangle data = subSurface.LockRectangle( D3D.LockFlags.ReadOnly );
// Copy it
PixelBox locked = new PixelBox( dst.Width, dst.Height, dst.Depth, tmpFormat );
FromD3DLock( locked, data );
PixelConverter.BulkPixelConversion( locked, dst );
subSurface.UnlockRectangle();
// Release temporary surface and texture
subSurface.Dispose();
tmp.Dispose();
}
else
{
// Create temp texture
D3D.VolumeTexture tmp =
new D3D.VolumeTexture( device, dst.Width, dst.Height, dst.Depth,
0, D3D.Usage.None,
D3DHelper.ConvertEnum( tmpFormat ),
D3D.Pool.Scratch );
D3D.Volume subVolume = tmp.GetVolumeLevel( 0 );
// Volume
D3D.Box ddestBox = ToD3DBoxExtent( dst );
D3D.Box dsrcBox = ToD3DBox( srcBox );
D3D.Volume.FromVolume( subVolume, volume, D3D.Filter.None, 0, dsrcBox, ddestBox );
// Lock temp surface and copy it to memory
//D3D.LockedBox lbox; // Filled in by D3D
DX.DataBox data = subVolume.LockBox( D3D.LockFlags.ReadOnly );
// Copy it
PixelBox locked = new PixelBox( dst.Width, dst.Height, dst.Depth, tmpFormat );
FromD3DLock( locked, data );
PixelConverter.BulkPixelConversion( locked, dst );
subVolume.UnlockBox();
// Release temporary surface and texture
subVolume.Dispose();
tmp.Dispose();
}
}
