BSD 4_4_Lite2 development

Work on file usr/src/contrib/X11R5-lib/lib/X/XVisUtil.c

Synthesized-from: CSRG/cd3/4.4BSD-Lite2

diff --git a/usr/src/contrib/X11R5-lib/lib/X/XVisUtil.c b/usr/src/contrib/X11R5-lib/lib/X/XVisUtil.c
new file mode 100644 (file)
index 0000000..274bf6f
--- /dev/null
+++ b/usr/src/contrib/X11R5-lib/lib/X/XVisUtil.c
@@ -0,0 +1,241 @@
+/* $XConsortium: XVisUtil.c,v 11.14 91/06/30 18:15:42 rws Exp $ */
+/* Copyright    Massachusetts Institute of Technology    1986  */
+
+/*
+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 M.I.T. not be used in advertising or
+publicity pertaining to distribution of the software without specific,
+written prior permission.  M.I.T. makes no representations about the
+suitability of this software for any purpose.  It is provided "as is"
+without express or implied warranty.
+*/
+
+#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( dpy, visual_info_mask, 
+                           visual_info_template, nitems)
+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 = vp;
+              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;
+}
+
+\f
+/*
+ *     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( dpy, screen, depth, class, visual_info)
+       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 = vp;
+               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;
+
+}