Added libXmu

1 files changed, 158 insertions, 0 deletions

diff --git a/libXmu/src/AllCmap.c b/libXmu/src/AllCmap.c
new file mode 100644
index 000000000..09ae52aa4
--- /dev/null
+++ b/libXmu/src/AllCmap.c
@@ -0,0 +1,158 @@
+/* $Xorg: AllCmap.c,v 1.4 2001/02/09 02:03:51 xorgcvs Exp $ */
+
+/* 
+ 
+Copyright 1989, 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.
+
+*/
+/* $XFree86: xc/lib/Xmu/AllCmap.c,v 1.7 2001/01/17 19:42:53 dawes Exp $ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include <stdio.h>
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+#include <X11/Xutil.h>
+#include <X11/Xmu/StdCmap.h>
+ 
+static XVisualInfo *getDeepestVisual(int, XVisualInfo*, int);
+
+/*
+ * To create all of the appropriate standard colormaps for every visual of
+ * every screen on a given display, use XmuAllStandardColormaps.
+ *
+ * Define and retain as permanent resources all standard colormaps which are
+ * meaningful for the visuals of each screen of the display.  Return 0 on
+ * failure, non-zero on success.  If the property of any standard colormap 
+ * is already defined, redefine it.
+ *
+ * This interface is intended to be used by window managers or a client
+ * upon start-up of a session.
+ *
+ * The standard colormaps of a screen are defined by properties associated
+ * with the screen's root window.  Each screen has exactly one root window.
+ * The property names of standard colormaps are predefined, and each property
+ * name may describe at most one colormap.
+ * 
+ * The standard colormaps are
+ *		RGB_BEST_MAP
+ *		RGB_RED_MAP
+ *		RGB_GREEN_MAP
+ *		RGB_BLUE_MAP
+ *		RGB_DEFAULT_MAP
+ *		RGB_GRAY_MAP
+ *
+ * Therefore a screen may have at most 6 standard colormap properties defined.
+ *
+ * A standard colormap is associated with a particular visual of the screen.
+ * A screen may have multiple visuals defined, including visuals of the same
+ * class at different depths.  Note that a visual id might be repeated for
+ * more than one depth, so the visual id and the depth of a visual identify
+ * the visual.  The characteristics of the visual will determine which
+ * standard colormaps are meaningful under that visual, and will determine
+ * how the standard colormap is defined.  Because a standard colormap is
+ * associated with a specific visual, there must be a method of determining
+ * which visuals take precedence in defining standard colormaps.
+ * 
+ * The method used here is: for the visual of greatest depth, define all 
+ * standard colormaps meaningful to that visual class, according to this
+ * order of (descending) precedence:
+ *	1. DirectColor
+ *	2. PseudoColor
+ *	3. TrueColor and GrayScale
+ *	4. StaticColor and StaticGray
+ *
+ * Allows partial success by screenful.  For example, if a map on screen 1
+ * fails, the maps on screen 0, created earlier, will remain.  However,
+ * none on screen 1 will remain.  If a map on 0 fails, none will remain.
+ *
+ * See the comments under XmuVisualStandardColormaps() for notes on which
+ * standard colormaps are meaningful under these classes of visuals.
+ */
+
+Status
+XmuAllStandardColormaps(Display *dpy)
+{
+    int 	nvisuals, scr;
+    Status	status;
+    long	vinfo_mask;
+    XVisualInfo	template, *vinfo, *v1, *v2;
+
+    status = 0;
+    /* for each screen, determine all visuals of this server */
+    for (scr=0; scr < ScreenCount(dpy); scr++)
+    {
+	template.screen = scr;
+	vinfo_mask = VisualScreenMask;
+	vinfo = XGetVisualInfo(dpy, vinfo_mask, &template, &nvisuals);
+	if (vinfo == NULL) /* unexpected: a screen with no visuals */
+	    continue;
+
+	v1 = getDeepestVisual(DirectColor, vinfo, nvisuals);
+	v2 = getDeepestVisual(PseudoColor, vinfo, nvisuals);
+
+	if (v2 &&
+	    (!v1 || (v2->colormap_size >=
+		     ((v1->red_mask | v1->green_mask | v1->blue_mask) + 1))))
+	    status = XmuVisualStandardColormaps(dpy, scr, v2->visualid,
+						(unsigned) v2->depth, 1, 1);
+	else if (v1)
+	    status = XmuVisualStandardColormaps(dpy, scr, v1->visualid,
+						(unsigned) v1->depth, 1, 1);
+
+	else {
+	    if (((v1 = getDeepestVisual(TrueColor, vinfo, nvisuals)) != NULL)
+		|| ((v1 = getDeepestVisual(StaticColor, vinfo, nvisuals)) !=
+		NULL))
+		status = XmuVisualStandardColormaps(dpy, scr, v1->visualid,
+						   (unsigned) v1->depth, 1, 1);
+	    if (status && 
+	       (((v1 = getDeepestVisual(GrayScale, vinfo, nvisuals)) != NULL)
+		|| ((v1 = getDeepestVisual(StaticGray, vinfo, nvisuals)) != 
+		    NULL)))
+		status = XmuVisualStandardColormaps(dpy, scr, v1->visualid,
+						   (unsigned) v1->depth, 1, 1);
+	}
+	XFree ((char *) vinfo);
+	if (!status) break;
+    }
+    return status;
+}
+
+static XVisualInfo *
+getDeepestVisual(int visual_class, XVisualInfo *vinfo, int nvisuals)
+{
+    register int	i;
+    register int	maxdepth = 0;
+    XVisualInfo		*v = NULL;
+    
+    for (i=0; i < nvisuals; i++, vinfo++)
+	if (vinfo->class == visual_class && vinfo->depth > maxdepth)
+	{
+	    maxdepth = vinfo->depth;
+	    v = vinfo;
+	}
+    return(v);
+}
+