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Diffstat (limited to 'src/xftcolor.c')
| -rw-r--r-- | src/xftcolor.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/src/xftcolor.c b/src/xftcolor.c new file mode 100644 index 0000000..7a5005d --- /dev/null +++ b/src/xftcolor.c @@ -0,0 +1,125 @@ +/* + * $XFree86: xc/lib/Xft/xftcolor.c,v 1.3 2002/10/11 17:53:02 keithp Exp $ + * + * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc. + * + * 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); +} |