Changes the image color space to gray * by just changing color_space and the palette. * Image must be BINARY or MAP. Palette is changed only if image was BINARY. * * \verbatim image:SetGray() [in Lua 5] \endverbatim * \ingroup imgclass
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Changes the image color space to gray * by just changing color_space and the palette. * Image must be BINARY or MAP. Palette is changed only if image was BINARY. * * \verbatim image:SetGray() [in Lua 5] \endverbatim * \ingroup imgclass