| gdk-Colormaps-and-Colors {RGtk2} | R Documentation |
Manipulation of colors and colormaps
gdkColormapNew(visual, allocate)
gdkColormapGetSystem()
gdkColormapGetSystemSize()
gdkColormapAllocColors(colormap, colors, writeable, best.match)
gdkColormapAllocColor(object, color, writeable, best.match)
gdkColormapFreeColors(object, colors)
gdkColormapQueryColor(object, pixel)
gdkColormapGetVisual(object)
gdkColormapGetScreen(object)
gdkColorsStore(object, colors)
gdkColorWhite(object)
gdkColorBlack(object)
gdkColorParse(spec)
gdkColorAlloc(object, color)
gdkColorChange(object, color)
gdkColorToString(object)
gdkColormap(visual, allocate)
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
with 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
directly.
In previous revisions of this interface, a number
of functions that take a GdkColormap parameter
were replaced with functions whose names began
with "gdk_colormap_". This process will probably
be extended somewhat in the future -
gdkColorWhite, gdkColorBlack, and
gdkColorChange will probably become aliases.
GdkColorGdkColor structure is used to describe an
allocated or unallocated color.
GdkColor is a transparent-type.
pixelredgreenblue
GdkColormapsizecolorsGdkColor] 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 gdkColormapNew.
Derived by RGtkGen from GTK+ documentation
http://developer.gnome.org/doc/API/2.0/gdk/gdk-Colormaps-and-Colors.html