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-rw-r--r--libXft/src/xftcolor.c123
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diff --git a/libXft/src/xftcolor.c b/libXft/src/xftcolor.c
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+/*
+ * 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"
+
+_X_EXPORT 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);
+}
+
+_X_EXPORT 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;
+}
+
+_X_EXPORT void
+XftColorFree (Display *dpy,
+ Visual *visual,
+ Colormap cmap,
+ XftColor *color)
+{
+ if (visual->class != TrueColor)
+ XFreeColors (dpy, cmap, &color->pixel, 1, 0);
+}