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Diffstat (limited to 'libX11/src/GetRGBCMap.c')
| -rw-r--r-- | libX11/src/GetRGBCMap.c | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/libX11/src/GetRGBCMap.c b/libX11/src/GetRGBCMap.c new file mode 100644 index 000000000..45a94b782 --- /dev/null +++ b/libX11/src/GetRGBCMap.c @@ -0,0 +1,136 @@ +/* $Xorg: GetRGBCMap.c,v 1.4 2001/02/09 02:03:33 xorgcvs Exp $ */ + +/* + +Copyright 1987, 1998 The Open Group + +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. + +The above copyright notice and this permission notice shall be included +in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR +OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall +not be used in advertising or otherwise to promote the sale, use or +other dealings in this Software without prior written authorization +from The Open Group. + +*/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include <X11/Xlibint.h> +#include <X11/Xutil.h> +#include "Xatomtype.h" +#include <X11/Xatom.h> + +Status XGetRGBColormaps ( + Display *dpy, + Window w, + XStandardColormap **stdcmap, /* RETURN */ + int *count, /* RETURN */ + Atom property) /* XA_RGB_BEST_MAP, etc. */ +{ + register int i; /* iterator variable */ + xPropStandardColormap *data = NULL; /* data read in from prop */ + Atom actual_type; /* how the prop was actually stored */ + int actual_format; /* ditto */ + unsigned long leftover; /* how much was left over */ + unsigned long nitems; /* number of 32bits read */ + int ncmaps; /* number of structs this makes */ + Bool old_style = False; /* if was too short */ + VisualID def_visual = None; /* visual to use if prop too short */ + XStandardColormap *cmaps; /* return value */ + + + if (XGetWindowProperty (dpy, w, property, 0L, 1000000L, False, + XA_RGB_COLOR_MAP, &actual_type, &actual_format, + &nitems, &leftover, (unsigned char **)&data) + != Success) + return False; + + /* if wrong type or format, or too small for us, then punt */ + if ((actual_type != XA_RGB_COLOR_MAP) || (actual_format != 32) || + (nitems < OldNumPropStandardColormapElements)) { + if (data) Xfree ((char *) data); + return False; + } + + /* + * See how many properties were found; if pre-ICCCM then assume + * default visual and a kill id of 1. + */ + if (nitems < NumPropStandardColormapElements) { + ncmaps = 1; + old_style = True; + if (nitems < (NumPropStandardColormapElements - 1)) { + Screen *sp = _XScreenOfWindow (dpy, w); + + if (!sp) { + if (data) Xfree ((char *) data); + return False; + } + def_visual = sp->root_visual->visualid; + } + } else { + /* + * make sure we have an integral number of colormaps + */ + ncmaps = (nitems / NumPropStandardColormapElements); + if ((((unsigned long) ncmaps) * NumPropStandardColormapElements) != + nitems) { + if (data) Xfree ((char *) data); + return False; + } + } + + + /* + * allocate array + */ + cmaps = (XStandardColormap *) Xmalloc (ncmaps * + sizeof (XStandardColormap)); + if (!cmaps) { + if (data) Xfree ((char *) data); + return False; + } + + + /* + * and fill it in, handling compatibility with pre-ICCCM short stdcmaps + */ + { + register XStandardColormap *map; + register xPropStandardColormap *prop; + + for (i = ncmaps, map = cmaps, prop = data; i > 0; i--, map++, prop++) { + map->colormap = prop->colormap; + map->red_max = prop->red_max; + map->red_mult = prop->red_mult; + map->green_max = prop->green_max; + map->green_mult = prop->green_mult; + map->blue_max = prop->blue_max; + map->blue_mult = prop->blue_mult; + map->base_pixel = prop->base_pixel; + map->visualid = (def_visual ? def_visual : prop->visualid); + map->killid = (old_style ? None : prop->killid); + } + } + Xfree ((char *) data); + *stdcmap = cmaps; + *count = ncmaps; + return True; +} + |