Sets a 8-bit mask detailing what colour channels the pixel shaders will be allowed to write to when using this blend state.
The valid values for the colour write mask is any combination of the D3D11_COLOR_WRITE_ENABLE_RED, D3D11_COLOR_WRITE_ENABLE_GREEN,
D3D11_COLOR_WRITE_ENABLE_BLUE and D3D11_COLOR_WRITE_ENABLE_ALPHA constants (the D3D11_COLOR_WRITE_ENABLE_ALL is the combination of all those flags).

DX11 SET BLEND STATE COLOUR WRITE MASK blendState, colourWriteMask, [renderTarget]

blendState

Dword
The blend state to set the blend mode for.

colourWriteMask

Byte
The colour write mask that details what channels any pixel shader using the given blend state will be able to write to.

[Optional] renderTarget

Dword
An ID of a render target to set this specific blend setting for. The valid range is [0..7]. Defaults to 0 which is the value used if multiple render targets are not used by this state.

This function does not return a value.

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