Instead of from WINED3DFMT_B8G8R8A8_UNORM.

For regular clears this is the intersection of the viewport and scissor
rectangles, but color fills shouldn't be affected by those.

server: Change the removable fd flag to a cacheable flag to make it possible for fd users to set it dynamically.

Spotted by Sylvain Hitier.

d3dx9: Black out pixels which are outside the source rect in D3DXLoadSurfaceFromMemory if no stretching is used.