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+/* $Xorg: VisUtil.c,v 1.4 2001/02/09 02:03:37 xorgcvs Exp $ */
+/*
+
+Copyright 1986, 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 "Xlibint.h"
+#include "Xutil.h"
+#include <stdio.h>
+/*
+ * This procedure returns a list of visual information structures
+ * that match the specified attributes given in the visual information
+ * template.
+ *
+ * If no visuals exist that match the specified attributes, a NULL is
+ * returned.
+ *
+ * The choices for visual_info_mask are:
+ *
+ * VisualNoMask
+ * VisualIDMask
+ * VisualScreenMask
+ * VisualDepthMask
+ * VisualClassMask
+ * VisualRedMaskMask
+ * VisualGreenMaskMask
+ * VisualBlueMaskMask
+ * VisualColormapSizeMask
+ * VisualBitsPerRGBMask
+ * VisualAllMask
+ */
+
+XVisualInfo *XGetVisualInfo(
+ Display *dpy,
+ register long visual_info_mask,
+ register XVisualInfo *visual_info_template,
+ int *nitems) /* RETURN */
+{
+
+ register Visual *vp;
+ register Depth *dp;
+ Screen *sp;
+ int ii,screen_s,screen_e,total,count;
+ register XVisualInfo *vip,*vip_base;
+
+ /* NOTE: NO HIGH PERFORMING CODE TO BE FOUND HERE */
+
+ LockDisplay(dpy);
+
+ /* ALLOCATE THE ORIGINAL BUFFER; REALLOCED LATER IF OVERFLOW OCCURS;
+ FREED AT END IF NO VISUALS ARE FOUND */
+
+ count = 0;
+ total = 10;
+ if (! (vip_base = vip = (XVisualInfo *)
+ Xmalloc((unsigned) (sizeof(XVisualInfo) * total)))) {
+ UnlockDisplay(dpy);
+ return (XVisualInfo *) NULL;
+ }
+
+ /* DETERMINE IF WE DO ALL SCREENS OR ONLY ONE */
+
+ screen_s = 0;
+ screen_e = dpy->nscreens;
+ if (visual_info_mask & VisualScreenMask)
+ {
+ screen_s = visual_info_template->screen;
+ if (screen_s < 0 || screen_s >= screen_e)
+ screen_e = screen_s;
+ else
+ screen_e = screen_s + 1;
+ }
+
+ /* LOOP THROUGH SCREENS */
+
+ for (ii=screen_s; ii<screen_e; ii++)
+ {
+ sp = (Screen *)(&dpy->screens[ii]);
+
+ /* LOOP THROUGH DEPTHS */
+
+ for (dp=sp->depths; dp < (sp->depths + sp->ndepths); dp++)
+ {
+ if ((visual_info_mask & VisualDepthMask) &&
+ (dp->depth != visual_info_template->depth)) continue;
+
+ /* LOOP THROUGH VISUALS */
+
+ if (dp->visuals) {
+ for (vp=dp->visuals; vp<(dp->visuals + dp->nvisuals); vp++) {
+ if ((visual_info_mask & VisualIDMask) &&
+ (vp->visualid != visual_info_template->visualid)) continue;
+ if ((visual_info_mask & VisualClassMask) &&
+ (vp->class != visual_info_template->class)) continue;
+ if ((visual_info_mask & VisualRedMaskMask) &&
+ (vp->red_mask != visual_info_template->red_mask)) continue;
+ if ((visual_info_mask & VisualGreenMaskMask) &&
+ (vp->green_mask != visual_info_template->green_mask)) continue;
+ if ((visual_info_mask & VisualBlueMaskMask) &&
+ (vp->blue_mask != visual_info_template->blue_mask)) continue;
+ if ((visual_info_mask & VisualColormapSizeMask) &&
+ (vp->map_entries != visual_info_template->colormap_size)) continue;
+ if ((visual_info_mask & VisualBitsPerRGBMask) &&
+ (vp->bits_per_rgb != visual_info_template->bits_per_rgb)) continue;
+
+ /* YEA!!! WE FOUND A GOOD ONE */
+
+ if (count+1 > total)
+ {
+ XVisualInfo *old_vip_base = vip_base;
+ total += 10;
+ if (! (vip_base = (XVisualInfo *)
+ Xrealloc((char *) vip_base,
+ (unsigned) (sizeof(XVisualInfo) * total)))) {
+ Xfree((char *) old_vip_base);
+ UnlockDisplay(dpy);
+ return (XVisualInfo *) NULL;
+ }
+ vip = &vip_base[count];
+ }
+
+ count++;
+
+ vip->visual = _XVIDtoVisual(dpy, vp->visualid);
+ vip->visualid = vp->visualid;
+ vip->screen = ii;
+ vip->depth = dp->depth;
+ vip->class = vp->class;
+ vip->red_mask = vp->red_mask;
+ vip->green_mask = vp->green_mask;
+ vip->blue_mask = vp->blue_mask;
+ vip->colormap_size = vp->map_entries;
+ vip->bits_per_rgb = vp->bits_per_rgb;
+
+ vip++;
+
+ } /* END OF LOOP ON VISUALS */
+ } /* END OF IF THERE ARE ANY VISUALS AT THIS DEPTH */
+
+ } /* END OF LOOP ON DEPTHS */
+
+ } /* END OF LOOP ON SCREENS */
+
+ UnlockDisplay(dpy);
+
+ if (count)
+ {
+ *nitems = count;
+ return vip_base;
+ }
+
+ Xfree((char *) vip_base);
+ *nitems = 0;
+ return NULL;
+}
+
+
+/*
+ * This procedure will return the visual information for a visual
+ * that matches the specified depth and class for a screen. Since
+ * multiple visuals may exist that match the specified depth and
+ * class, which visual chosen is undefined.
+ *
+ * If a visual is found, True is returned as the function value,
+ * otherwise False is returned.
+ */
+
+Status XMatchVisualInfo(
+ Display *dpy,
+ int screen,
+ int depth,
+ int class,
+ XVisualInfo *visual_info) /* RETURNED */
+{
+
+ Visual *vp;
+ Depth *dp;
+ Screen *sp;
+ int ii,jj;
+
+ if (screen < 0 || screen >= dpy->nscreens)
+ return False;
+
+ LockDisplay(dpy);
+
+ sp = (Screen *)(&dpy->screens[screen]);
+
+ dp = sp->depths;
+
+ for (ii=0; ii < sp->ndepths; ii++)
+ {
+
+ /* LOOK THROUGH DEPTHS FOR THE WANTED DEPTH */
+
+ if (dp->depth == depth)
+ {
+ vp = dp->visuals;
+
+ /* LOOK THROUGH VISUALS FOR THE WANTED CLASS */
+
+ /* if nvisuals == 0 then vp will be NULL */
+ for (jj=0; jj<dp->nvisuals; jj++)
+ {
+ if (vp->class == class)
+ {
+ visual_info->visual = _XVIDtoVisual(dpy, vp->visualid);
+ visual_info->visualid = vp->visualid;
+ visual_info->screen = screen;
+ visual_info->depth = depth;
+ visual_info->class = vp->class;
+ visual_info->red_mask = vp->red_mask;
+ visual_info->green_mask = vp->green_mask;
+ visual_info->blue_mask = vp->blue_mask;
+ visual_info->colormap_size = vp->map_entries;
+ visual_info->bits_per_rgb = vp->bits_per_rgb;
+ UnlockDisplay(dpy);
+ return True;
+ }
+ vp++;
+ }
+ }
+
+ dp++;
+
+ }
+
+ UnlockDisplay(dpy);
+
+ return False;
+
+}
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