From 2427e4ea664ed5b0b16575ef1cdeb209afd941d0 Mon Sep 17 00:00:00 2001
From: dolio <dolio>
Date: Wed, 29 Sep 2004 18:33:42 +0000
Subject: [PATCH] Modified paint_all so that it doesn't draw off-screen
 windows, and doesn't     draw shadows on desktop 'root' windows.

---
 ChangeLog  |  7 +++++++
 xcompmgr.c | 10 +++++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/ChangeLog b/ChangeLog
index d04f4f8f..cd9c99a7 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2004-09-29  Dan Doel  <dolio@case.edu>
+
+	* xcompmgr.c: (paint_all):
+	Added some small optimizations by Thomas Luebking. paint_all
+	now avoids drawing windows that don't appear on the screen,
+	and doesn't bother drawing shadows on desktop windows.
+
 2004-09-23  Dan Doel  <dolio@case.edu>
 
 	* xcompmgr.1:
diff --git a/xcompmgr.c b/xcompmgr.c
index 8eaa0a2c..c39b7b1f 100644
--- a/xcompmgr.c
+++ b/xcompmgr.c
@@ -942,6 +942,10 @@ paint_all (Display *dpy, XserverRegion region)
 	/* never painted, ignore it */
 	if (!w->damaged)
 	    continue;
+	/* if invisible, ignore it */
+	if (w->a.x + w->a.width < 1 || w->a.y + w->a.height < 1
+	    || w->a.x >= root_width || w->a.y >= root_height)
+	    continue;
 	if (!w->picture)
 	{
 	    XRenderPictureAttributes	pa;
@@ -1030,6 +1034,9 @@ paint_all (Display *dpy, XserverRegion region)
 	case CompSimple:
 	    break;
 	case CompServerShadows:
+	    /* dont' bother drawing shadows on desktop windows */
+	    if (w->windowType == winDesktopAtom)
+		break;
 	    set_ignore (dpy, NextRequest (dpy));
 	    if (w->opacity != OPAQUE && !w->shadowPict)
 		w->shadowPict = solid_picture (dpy, True,
@@ -1044,7 +1051,8 @@ paint_all (Display *dpy, XserverRegion region)
 			      w->shadow_width, w->shadow_height);
 	    break;
 	case CompClientShadows:
-	    if (w->shadow)
+	    /* don't bother drawing shadows on desktop windows */
+	    if (w->shadow && w->windowType != winDesktopAtom)
 	    {
 		XRenderComposite (dpy, PictOpOver, blackPicture, w->shadow, rootBuffer,
 				  0, 0, 0, 0,