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/*
* $Id: xftcolor.c,v 1.4 2005/07/03 07:00:57 daniels Exp $
*
* Copyright © 2000 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "xftint.h"
Bool
XftColorAllocName (Display *dpy,
_Xconst Visual *visual,
Colormap cmap,
_Xconst char *name,
XftColor *result)
{
XColor screen, exact;
if (!XAllocNamedColor (dpy, cmap, name, &screen, &exact))
{
/* XXX stick standard colormap stuff here */
return False;
}
result->pixel = screen.pixel;
result->color.red = exact.red;
result->color.green = exact.green;
result->color.blue = exact.blue;
result->color.alpha = 0xffff;
return True;
}
static short
maskbase (unsigned long m)
{
short i;
if (!m)
return 0;
i = 0;
while (!(m&1))
{
m>>=1;
i++;
}
return i;
}
static short
masklen (unsigned long m)
{
unsigned long y;
y = (m >> 1) &033333333333;
y = m - y - ((y >>1) & 033333333333);
return (short) (((y + (y >> 3)) & 030707070707) % 077);
}
Bool
XftColorAllocValue (Display *dpy,
Visual *visual,
Colormap cmap,
_Xconst XRenderColor *color,
XftColor *result)
{
if (visual->class == TrueColor)
{
int red_shift, red_len;
int green_shift, green_len;
int blue_shift, blue_len;
red_shift = maskbase (visual->red_mask);
red_len = masklen (visual->red_mask);
green_shift = maskbase (visual->green_mask);
green_len = masklen (visual->green_mask);
blue_shift = maskbase (visual->blue_mask);
blue_len = masklen (visual->blue_mask);
result->pixel = (((color->red >> (16 - red_len)) << red_shift) |
((color->green >> (16 - green_len)) << green_shift) |
((color->blue >> (16 - blue_len)) << blue_shift));
}
else
{
XColor xcolor;
xcolor.red = color->red;
xcolor.green = color->green;
xcolor.blue = color->blue;
if (!XAllocColor (dpy, cmap, &xcolor))
return False;
result->pixel = xcolor.pixel;
}
result->color.red = color->red;
result->color.green = color->green;
result->color.blue = color->blue;
result->color.alpha = color->alpha;
return True;
}
void
XftColorFree (Display *dpy,
Visual *visual,
Colormap cmap,
XftColor *color)
{
if (visual->class != TrueColor)
XFreeColors (dpy, cmap, &color->pixel, 1, 0);
}
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