1 /* 2 3 Copyright 1989, 1998 The Open Group 4 5 Permission to use, copy, modify, distribute, and sell this software and its 6 documentation for any purpose is hereby granted without fee, provided that 7 the above copyright notice appear in all copies and that both that 8 copyright notice and this permission notice appear in supporting 9 documentation. 10 11 The above copyright notice and this permission notice shall be included in 12 all copies or substantial portions of the Software. 13 14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN 18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 20 21 Except as contained in this notice, the name of The Open Group shall not be 22 used in advertising or otherwise to promote the sale, use or other dealings 23 in this Software without prior written authorization from The Open Group. 24 25 */ 26 27 /* 28 * Author: Donna Converse, MIT X Consortium 29 */ 30 31 #ifdef HAVE_CONFIG_H 32 #include <config.h> 33 #endif 34 #include <stdio.h> 35 #include <X11/Xlib.h> 36 #include <X11/Xatom.h> 37 #include <X11/Xutil.h> 38 #include <X11/Xmu/StdCmap.h> 39 #include <stdlib.h> 40 #include "Xmuint.h" 41 42 /* 43 * Prototypes 44 */ 45 static Status lookup(Display*, int, VisualID, Atom, XStandardColormap*, Bool); 46 47 /* 48 * To create a standard colormap if one does not currently exist, or 49 * replace the currently existing standard colormap, use 50 * XmuLookupStandardColormap(). 51 * 52 * Given a screen, a visual, and a property, XmuLookupStandardColormap() 53 * will determine the best allocation for the property under the specified 54 * visual, and determine the whether to create a new colormap or to use 55 * the default colormap of the screen. It will call XmuStandardColormap() 56 * to create the standard colormap. 57 * 58 * If replace is true, any previous definition of the property will be 59 * replaced. If retain is true, the property and the colormap will be 60 * made permanent for the duration of the server session. However, 61 * pre-existing property definitions which are not replaced cannot be made 62 * permanent by a call to XmuLookupStandardColormap(); a request to retain 63 * resources pertains to newly created resources. 64 * 65 * Returns 0 on failure, non-zero on success. A request to create a 66 * standard colormap upon a visual which cannot support such a map is 67 * considered a failure. An example of this would be requesting any 68 * standard colormap property on a monochrome visual, or, requesting an 69 * RGB_BEST_MAP on a display whose colormap size is 16. 70 */ 71 72 Status 73 XmuLookupStandardColormap(Display *dpy, int screen, VisualID visualid, 74 unsigned int depth, Atom property, 75 Bool replace, Bool retain) 76 /* 77 * dpy - specifies X server connection 78 * screen - specifies screen of display 79 * visualid - specifies the visual type 80 * depth - specifies the visual type 81 * property - a standard colormap property 82 * replace - specifies whether to replace 83 * retain - specifies whether to retain 84 */ 85 { 86 Display *odpy; /* original display connection */ 87 XStandardColormap *colormap; 88 XVisualInfo vinfo_template, *vinfo; /* visual */ 89 long vinfo_mask; 90 unsigned long r_max, g_max, b_max; /* allocation */ 91 int count; 92 Colormap cmap; /* colormap ID */ 93 Status status = 0; 94 95 96 /* Match the requested visual */ 97 98 vinfo_template.visualid = visualid; 99 vinfo_template.screen = screen; 100 vinfo_template.depth = depth; 101 vinfo_mask = VisualIDMask | VisualScreenMask | VisualDepthMask; 102 if ((vinfo = XGetVisualInfo(dpy, vinfo_mask, &vinfo_template, &count)) == 103 NULL) 104 return 0; 105 106 /* Monochrome visuals have no standard maps */ 107 108 if (vinfo->colormap_size <= 2) { 109 XFree((char *) vinfo); 110 return 0; 111 } 112 113 /* If the requested property already exists on this screen, and, 114 * if the replace flag has not been set to true, return success. 115 * lookup() will remove a pre-existing map if replace is true. 116 */ 117 118 if (lookup(dpy, screen, visualid, property, (XStandardColormap *) NULL, 119 replace) && !replace) { 120 XFree((char *) vinfo); 121 return 1; 122 } 123 124 /* Determine the best allocation for this property under the requested 125 * visualid and depth, and determine whether or not to use the default 126 * colormap of the screen. 127 */ 128 129 if (!XmuGetColormapAllocation(vinfo, property, &r_max, &g_max, &b_max)) { 130 XFree((char *) vinfo); 131 return 0; 132 } 133 134 cmap = (property == XA_RGB_DEFAULT_MAP && 135 visualid == XVisualIDFromVisual(DefaultVisual(dpy, screen))) 136 ? DefaultColormap(dpy, screen) : None; 137 138 /* If retaining resources, open a new connection to the same server */ 139 140 if (retain) { 141 odpy = dpy; 142 if ((dpy = XOpenDisplay(XDisplayString(odpy))) == NULL) { 143 XFree((char *) vinfo); 144 return 0; 145 } 146 } 147 148 /* Create the standard colormap */ 149 150 colormap = XmuStandardColormap(dpy, screen, visualid, depth, property, 151 cmap, r_max, g_max, b_max); 152 153 /* Set the standard colormap property */ 154 155 if (colormap) { 156 XGrabServer(dpy); 157 158 if (lookup(dpy, screen, visualid, property, colormap, replace) && 159 !replace) { 160 /* Someone has defined the property since we last looked. 161 * Since we will not replace it, release our own resources. 162 * If this is the default map, our allocations will be freed 163 * when this connection closes. 164 */ 165 if (colormap->killid == ReleaseByFreeingColormap) 166 XFreeColormap(dpy, colormap->colormap); 167 } 168 else if (retain) { 169 XSetCloseDownMode(dpy, RetainPermanent); 170 } 171 XUngrabServer(dpy); 172 XFree((char *) colormap); 173 status = 1; 174 } 175 176 if (retain) 177 XCloseDisplay(dpy); 178 XFree((char *) vinfo); 179 return status; 180 } 181 182 /***************************************************************************/ 183 184 /* Lookup a standard colormap property. If the property is RGB_DEFAULT_MAP, 185 * the visualid is used to determine whether the indicated standard colormap 186 * exists. If the map exists and replace is true, delete the resources used 187 * by the map and remove the property. Return true if the map exists, 188 * or did exist and was deleted; return false if the map was not found. 189 * 190 * Note that this is not the way that a Status return is normally used. 191 * 192 * If new is not NULL, new points to an XStandardColormap structure which 193 * describes a standard colormap of the specified property. It will be made 194 * a standard colormap of the screen if none already exists, or if replace 195 * is true. 196 */ 197 198 static Status 199 lookup(Display *dpy, int screen, VisualID visualid, Atom property, 200 XStandardColormap *cnew, Bool replace) 201 /* 202 * dpy - specifies display connection 203 * screen - specifies screen number 204 * visualid - specifies visualid for std map 205 * property - specifies colormap property name 206 * cnew - specifies a standard colormap 207 * replace - specifies whether to replace 208 */ 209 { 210 register int i; 211 int count; 212 XStandardColormap *stdcmaps, *s; 213 Window win = RootWindow(dpy, screen); 214 215 /* The property does not already exist */ 216 217 if (! XGetRGBColormaps(dpy, win, &stdcmaps, &count, property)) { 218 if (cnew) 219 XSetRGBColormaps(dpy, win, cnew, 1, property); 220 return 0; 221 } 222 223 /* The property exists and is not describing the RGB_DEFAULT_MAP */ 224 225 if (property != XA_RGB_DEFAULT_MAP) { 226 if (replace) { 227 XmuDeleteStandardColormap(dpy, screen, property); 228 if (cnew) 229 XSetRGBColormaps(dpy, win, cnew, 1, property); 230 } 231 XFree((char *)stdcmaps); 232 return 1; 233 } 234 235 /* The property exists and is RGB_DEFAULT_MAP */ 236 237 for (i=0, s=stdcmaps; (i < count) && (s->visualid != visualid); i++, s++) 238 ; 239 240 /* No RGB_DEFAULT_MAP property matches the given visualid */ 241 242 if (i == count) { 243 if (cnew) { 244 XStandardColormap *m, *maps; 245 246 s = Xmumallocarray((count+1), sizeof(XStandardColormap)); 247 248 for (i = 0, m = s, maps = stdcmaps; i < count; i++, m++, maps++) { 249 m->colormap = maps->colormap; 250 m->red_max = maps->red_max; 251 m->red_mult = maps->red_mult; 252 m->green_max = maps->green_max; 253 m->green_mult = maps->green_mult; 254 m->blue_max = maps->blue_max; 255 m->blue_mult = maps->blue_mult; 256 m->base_pixel = maps->base_pixel; 257 m->visualid = maps->visualid; 258 m->killid = maps->killid; 259 } 260 m->colormap = cnew->colormap; 261 m->red_max = cnew->red_max; 262 m->red_mult = cnew->red_mult; 263 m->green_max = cnew->green_max; 264 m->green_mult = cnew->green_mult; 265 m->blue_max = cnew->blue_max; 266 m->blue_mult = cnew->blue_mult; 267 m->base_pixel = cnew->base_pixel; 268 m->visualid = cnew->visualid; 269 m->killid = cnew->killid; 270 271 XSetRGBColormaps(dpy, win, s, ++count, property); 272 free(s); 273 } 274 XFree((char *) stdcmaps); 275 return 0; 276 } 277 278 /* Found an RGB_DEFAULT_MAP property with a matching visualid */ 279 280 if (replace) { 281 /* Free old resources first - we may need them, particularly in 282 * the default colormap of the screen. However, because of this, 283 * it is possible that we will destroy the old resource and fail 284 * to create a new one if XmuStandardColormap() fails. 285 */ 286 287 if (count == 1) { 288 XmuDeleteStandardColormap(dpy, screen, property); 289 if (cnew) 290 XSetRGBColormaps(dpy, win, cnew, 1, property); 291 } 292 else { 293 XStandardColormap *map; 294 295 /* s still points to the matching standard colormap */ 296 297 if (s->killid == ReleaseByFreeingColormap) { 298 if ((s->colormap != None) && 299 (s->colormap != DefaultColormap(dpy, screen))) 300 XFreeColormap(dpy, s->colormap); 301 } 302 else if (s->killid != None) 303 XKillClient(dpy, s->killid); 304 305 map = (cnew) ? cnew : stdcmaps + --count; 306 307 s->colormap = map->colormap; 308 s->red_max = map->red_max; 309 s->red_mult = map->red_mult; 310 s->green_max = map->green_max; 311 s->green_mult = map->green_mult; 312 s->blue_max = map->blue_max; 313 s->blue_mult = map->blue_mult; 314 s->visualid = map->visualid; 315 s->killid = map->killid; 316 317 XSetRGBColormaps(dpy, win, stdcmaps, count, property); 318 } 319 } 320 XFree((char *) stdcmaps); 321 return 1; 322 } 323
Indexes created Mon Aug 17 00:26:26 UTC 2026