Function sdl2_sys::SDL_ComposeCustomBlendMode

pub unsafe extern "C" fn SDL_ComposeCustomBlendMode(
    srcColorFactor: SDL_BlendFactor, 
    dstColorFactor: SDL_BlendFactor, 
    colorOperation: SDL_BlendOperation, 
    srcAlphaFactor: SDL_BlendFactor, 
    dstAlphaFactor: SDL_BlendFactor, 
    alphaOperation: SDL_BlendOperation
) -> SDL_BlendMode

\brief Create a custom blend mode, which may or may not be supported by a given renderer

\param srcColorFactor \param dstColorFactor \param colorOperation \param srcAlphaFactor \param dstAlphaFactor \param alphaOperation

The result of the blend mode operation will be: dstRGB = dstRGB * dstColorFactor colorOperation srcRGB * srcColorFactor and dstA = dstA * dstAlphaFactor alphaOperation srcA * srcAlphaFactor