sync code with last improvements from OpenBSD

xserver/hw/xnest/Visual.c

@@ -0,0 +1,69 @@
+/*
+
+Copyright 1993 by Davor Matic
+
+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.  Davor Matic makes no representations about
+the suitability of this software for any purpose.  It is provided "as
+is" without express or implied warranty.
+
+*/
+
+#ifdef HAVE_XNEST_CONFIG_H
+#include <xnest-config.h>
+#endif
+
+#include <X11/X.h>
+#include <X11/Xproto.h>
+#include "scrnintstr.h"
+#include "dix.h"
+#include "mi.h"
+#include "Xnest.h"
+
+#include "Display.h"
+#include "Visual.h"
+
+Visual *
+xnestVisual(VisualPtr pVisual)
+{
+    int i;
+
+    for (i = 0; i < xnestNumVisuals; i++)
+        if (pVisual->class == xnestVisuals[i].class &&
+            pVisual->bitsPerRGBValue == xnestVisuals[i].bits_per_rgb &&
+            pVisual->ColormapEntries == xnestVisuals[i].colormap_size &&
+            pVisual->nplanes == xnestVisuals[i].depth &&
+            pVisual->redMask == xnestVisuals[i].red_mask &&
+            pVisual->greenMask == xnestVisuals[i].green_mask &&
+            pVisual->blueMask == xnestVisuals[i].blue_mask)
+            return xnestVisuals[i].visual;
+
+    return NULL;
+}
+
+Visual *
+xnestVisualFromID(ScreenPtr pScreen, VisualID visual)
+{
+    int i;
+
+    for (i = 0; i < pScreen->numVisuals; i++)
+        if (pScreen->visuals[i].vid == visual)
+            return xnestVisual(&pScreen->visuals[i]);
+
+    return NULL;
+}
+
+Colormap
+xnestDefaultVisualColormap(Visual * visual)
+{
+    int i;
+
+    for (i = 0; i < xnestNumVisuals; i++)
+        if (xnestVisuals[i].visual == visual)
+            return xnestDefaultColormaps[i];
+
+    return None;
+}