¤ tryAllocColor, tryAllocColorF, et al

Types

tryAllocColor :: FudgetIO f =>
                 ColormapId -> RGB -> (Maybe Color -> f hi ho) -> f hi ho
tryAllocColorF :: ColormapId -> RGB -> Cont (F b c) (Maybe Color)
allocColor :: FudgetIO f => ColormapId -> RGB -> Cont (f hi ho) Color
allocColorF :: ColormapId -> RGB -> Cont (F b c) Color
allocColorPixel :: FudgetIO f => ColormapId -> RGB -> Cont (f hi ho) Pixel
allocColorPixelF :: ColormapId -> RGB -> Cont (F b c) Pixel
tryAllocNamedColor :: FudgetIO f =>
                      ColormapId -> ColorName -> (Maybe Color -> f hi ho) -> f hi ho
tryAllocNamedColorF :: ColormapId -> ColorName -> Cont (F b c) (Maybe Color)
allocNamedColor :: FudgetIO f => ColormapId -> ColorName -> Cont (f hi ho) Color
allocNamedColorF :: ColormapId -> ColorName -> Cont (F b c) Color
allocNamedColorPixel :: FudgetIO f => ColormapId -> ColorName -> Cont (f hi ho) Pixel
allocNamedColorPixelF :: ColormapId -> ColorName -> Cont (F b c) Pixel
allocNamedColorDef :: FudgetIO f =>
                      ColormapId -> ColorName -> String -> Cont (f hi ho) Color
allocNamedColorDefPixel :: FudgetIO f =>
                           ColormapId ->
                           ColorName -> String -> (Pixel -> f hi ho) -> f hi ho

Synopsis

tryAllocColor colormap rgb colkernel

data RGB = RGB Int Int Int

data Color = Color {colorPixel :: Pixel, colorRGB :: RGB}

data Pixel = Pixel Word

Description

The functions whose names do not begin with try abort the program with an error message, if the allocation fails.

allocNamedColorDef and allocNamedColorDefPixel first tries to allocate one color. If that fails it outputs a warning message on the standard error channel and tries a fallback color.

Arguments

colormap :: ColormapId

the colormap in which an entry is allocated. defaultColormap is the only supported colormap in the current implementation.

rgb :: RGB

the RGB values of the color

colkernel :: Maybe Color -> f hi ho

a fudget kernel parameterized by a Maybe Color value.

See Also