wmii

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parsecolor.c (966B)

      1 /* Copyright ©2007-2010 Kris Maglione <maglione.k at Gmail>
      2  * See LICENSE file for license details.
      3  */
      4 #include "../x11.h"
      5 
      6 ulong
      7 pixelvalue(Window *w, Color *c) {
      8 	XColor xc;
      9 
     10 	if(w->visual == nil || w->visual->class != TrueColor) {
     11 		if(c->pixel != ~0UL)
     12 			return c->pixel;
     13 		xc.red = c->red;
     14 		xc.green = c->green;
     15 		xc.blue = c->blue;
     16 		XAllocColor(display, w->colormap, &xc);
     17 		return c->pixel = xc.pixel;
     18 	}
     19 	if(w->depth == 32 || c->alpha == 0)
     20 		return (((ulong)c->alpha & 0xff00) << 16)
     21 		     | (((ulong)c->red & 0xff00) << 8)
     22 		     | (((ulong)c->green & 0xff00) << 0)
     23 		     | (((ulong)c->blue & 0xff00) >> 8);
     24 	else
     25 		return ((ulong)c->red * 0xffff / c->alpha & 0xff00) << 8
     26 		     | ((ulong)c->green * 0xffff / c->alpha & 0xff00) << 0
     27 		     | ((ulong)c->blue * 0xffff / c->alpha & 0xff00) >> 8;
     28 }
     29 
     30 bool
     31 parsecolor(const char *name, Color *ret) {
     32 	ret->pixel = ~0UL;
     33 	return XRenderParseColor(display, (char*)(uintptr_t)name, (XRenderColor*)ret);
     34 }