Manipulation of colors and colormaps
gdkColormapAllocColors(colormap, colors, writeable, best.match)
gdkColormapAllocColor(object, color, writeable, best.match)
These functions are used to modify colormaps. A colormap is an object that contains the mapping between the color values stored in memory and the RGB values that are used to display color values. In general, colormaps only contain significant information for pseudo-color visuals, but even for other visual types, a colormap object is required in some circumstances.
There are a couple of special colormaps that can
be retrieved. The system colormap (retrieved
gdkColormapGetSystem) is the default
colormap of the system. If you are using GdkRGB,
there is another colormap that is important - the
colormap in which GdkRGB works, retrieved with
gdkRgbGetColormap. However, when using GdkRGB,
it is not generally necessary to allocate colors
In previous revisions of this interface, a number
of functions that take a
were replaced with functions whose names began
with "gdk_colormap_". This process will probably
be extended somewhat in the future -
gdkColorChange will probably become aliases.
GdkColor structure is used to describe an
allocated or unallocated color.
GdkColor is a transparent-type.
[numeric] For allocated colors, the value used to draw this color on the screen.
[integer] The red component of the color. This is a value between 0 and 65535, with 65535 indicating full intensitiy.
[integer] The blue component of the color.
[integer] The green component of the color.
The colormap structure contains the following public fields.
For pseudo-color colormaps, the number of colors in the colormap.
An list containing the current values in the colormap. This can be used to map from pixel values back to RGB values. This is only meaningful for pseudo-color colormaps.
gdkColormap is the equivalent of
Derived by RGtkGen from GTK+ documentation
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