Re: XForms: pixel value & rgb triplet

From: Angus Leeming (a.leeming@ic.ac.uk)
Date: Thu Nov 16 2000 - 11:57:04 EST

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    # To subscribers of the xforms list from Angus Leeming <a.leeming@ic.ac.uk> :

    To set an xforms color
            int r, g, b /* 0 < r,g,b < 255 */
            fl_mapcolor( FL_FREE_COL4, r, g, b );
    To extract an xforms color
            fl_getmcolor( FL_FREE_COL4, &r, &g, &b);

    Angus

    On Wednesday 15 November 2000 14:59, Yann Guichoux wrote:
    > # To subscribers of the xforms list from Yann Guichoux
    > <yann.guichoux@ago.fr> :
    >
    > Hi,
    >
    > does anyone know the way to get an rgb triplet (from the xforms internal
    > colormap) corresponding to a pixel value (obtained with XGetPixel()) ?
    > (whatever the visual depth is...(8,16,24,32 bits))
    > or to know the color indice in the xforms colormap corresponding to this
    > pixel value.
    > (there is a fl_get_pixel(FL_COLOR) function...is there a simple way to
    > make a "fl_get_colorIndice(unsigned long Pixel)" function ???)
    >
    > thanks for any help.
    >
    > Yann
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