Sets the blending functions for the source and destination buffer at the index. Blending must be enabled with {@link #enableCapability(org.spout.renderer.api.gl.Context.Capability)}.
<p/>
Support for specifying the buffer index is only available in GL40.
@param bufferIndex The index of the target buffer
@param source The source function
@param destination The destination function
Sets the blending functions for the source and destination buffer at the index. Blending must be enabled with {@link #enableCapability(org.spout.renderer.api.gl.Context.Capability)}. <p/> Support for specifying the buffer index is only available in GL40.
@param bufferIndex The index of the target buffer @param source The source function @param destination The destination function