Contains the total number of bits in the color buffer of the /current window's/ current layer. For an RGBA layer, this is the sum of the red, green, blue, and alpha bits. For an color index layer, this is the number of bits of the color indexes.
Highligt Haskell source
Controls the color index colormap entry of the current window's logical colormap for the layer in use. The layer in use of the current window should be a color index window. The color index should be zero or greater and less than the total number of colormap entries for the window (see numColorMapEntries) and different from an overlay's transparent index (see transparentIndex).
If the layer in use's colormap was copied by reference, setting a colormap entry will force the duplication of the colormap.
Controls whether the individual color components in the framebuffer can or cannot be written. If the red flag is Disabled, for example, no change is made to the red component of any pixel in any of the color buffers, regardless of the drawing operation attempted. Initially, all color components can be written.
Changes to individual bits of components cannot be controlled. Rather, changes are either enabled or disabled for entire color components. Furthermore, this mask is used only in RGBA mode.
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