From 5ee372dad1b1c1283d6d6814852535895ce1699d Mon Sep 17 00:00:00 2001
From: Carsten Haitzler <raster@rasterman.com>
Date: Sun, 15 Oct 2000 05:00:40 +0000
Subject: [PATCH] evas_test client is smart enough to figoure out what windows
 obscure it and if they are shaped and suitably obscure bits of the evas so it
 doesnt have to render those. in software mode try moving a big window over
 the middle of the evas and watch the fps go up :) (i'ts simply not rendering
 what's under the window)

SVN revision: 3621
---
 legacy/evas/test/evas_test.c | 113 ++++++++++++++++++++++++++++++++++-
 1 file changed, 110 insertions(+), 3 deletions(-)

diff --git a/legacy/evas/test/evas_test.c b/legacy/evas/test/evas_test.c
index 13035618c1..07e83f8356 100644
--- a/legacy/evas/test/evas_test.c
+++ b/legacy/evas/test/evas_test.c
@@ -1,5 +1,6 @@
 #include "../src/Evas.h"
 #include <X11/Xutil.h>
+#include <X11/extensions/shape.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/time.h>
@@ -10,6 +11,13 @@
 #define IMGDIR "./img/"
 #define FNTDIR "./fnt"
 
+#ifndef SPANS_COMMON
+#define SPANS_COMMON(x1, w1, x2, w2) \
+(!((((x2) + (w2)) <= (x1)) || ((x2) >= ((x1) + (w1)))))
+#define RECTS_INTERSECT(x, y, w, h, xx, yy, ww, hh) \
+((SPANS_COMMON((x), (w), (xx), (ww))) && (SPANS_COMMON((y), (h), (yy), (hh))))
+#endif
+
 /* global variables */
 Display  *display = NULL;
 Window    win_base = 0, win_control = 0, win_view = 0;
@@ -105,6 +113,83 @@ get_time(void)
    return (double)timev.tv_sec + (((double)timev.tv_usec) / 1000000);
 }
 
+void
+obscure(Evas e)
+{
+   Display *disp;
+   Window win, root, parent, *children, www, prev_win;
+   int x, y, w, h, wx, wy, ww, wh;
+   unsigned int i, j, num, dummy;
+   
+   evas_clear_obscured_rects(e);
+   win = evas_get_window(e);
+   disp	= evas_get_display(e);
+   evas_get_drawable_size(e, &ww, &wh);
+   children = NULL;
+   XQueryTree(disp, win, &root, &parent, &children, &num);
+   XTranslateCoordinates(disp, win, root, 0, 0, &wx, &wy, &www);
+   do 
+     {
+	for (i = 0; i < num; i++)
+	  {
+	     XWindowAttributes att;
+	     
+	     XGetWindowAttributes(disp, children[i], &att);
+	     w = att.width;
+	     h = att.height;
+	     if ((att.map_state != IsUnmapped) &&
+		 (att.class == InputOutput))
+	       {
+		  XRectangle *rect;
+		  int r_num, ord;
+		  int ok;
+		  
+		  ok = 1;
+		  rect = XShapeGetRectangles(disp, children[i], ShapeBounding, 
+					     &r_num, &ord);
+		  if (rect) 
+		     {
+			if ((r_num == 1) && 
+			    (rect[0].x == 0) && (rect[0].y == 0) &&
+			    (rect[0].width == w) && (rect[0].height == h))
+			   ok = 1;
+			else
+			   ok = 0;
+			XFree(rect);
+		     }
+		  if (ok)
+		    {
+		       XTranslateCoordinates(disp, children[i], root, 0, 0, &x, &y, &www);
+		       if (win == evas_get_window(e))
+			 {
+			    evas_add_obscured_rect(e, x - wx, y - wy, w, h);
+			 }
+		       else if (children[i] != prev_win)
+			 {
+			    int isbelow;
+			    
+			    isbelow = 0;
+			    for (j = i + 1; j < num; j++)
+			       if (children[j] == prev_win) isbelow = 1;
+			    if (!isbelow)
+			      {
+				 evas_add_obscured_rect(e, x - wx, y - wy, w, h);
+			      }
+			 }
+		    }
+	       }
+	  }
+	prev_win = win;
+	if (children) XFree(children);
+	if (win == root) break;
+	win = parent;
+	children = NULL;
+	parent = 0;
+	XQueryTree(disp, win, &root, &parent, &children, &num);
+     }
+   while (1);
+}
+
 void
 set_blank_pointer(Display *d, Window w)
 {
@@ -692,12 +777,13 @@ handle_events(void)
      {
 	XEvent              ev;
 	Evas                e = NULL;
+	int had_expose;
 	
+	had_expose = 0;	
 	/* input events */
 	do
 	  {
 	     int event_ok;
-	     
 	     event_ok = 0;
 	     if (wait_for_events)
 	       {
@@ -733,7 +819,7 @@ handle_events(void)
 				 mouse_x = ev.xmotion.x;
 				 mouse_y = ev.xmotion.y;
 			      }
-			    else
+			    else if (e == evas_control)
 			      {
 				 mouse_x = ev.xmotion.x - 128;
 				 mouse_y = ev.xmotion.y;
@@ -741,10 +827,26 @@ handle_events(void)
 			    evas_event_move(e, ev.xmotion.x, ev.xmotion.y);
 			    break;
 			 case Expose:
+			    had_expose = 1;
 			    evas_update_rect(e, ev.xexpose.x, ev.xexpose.y, ev.xexpose.width, ev.xexpose.height);
 			    break;
 			 case VisibilityNotify:
-/*			    printf("state %i\n", ev.xvisibility.state);*/
+			    if (ev.xvisibility.state == VisibilityUnobscured)
+			      {
+				 evas_clear_obscured_rects(e);
+			      }
+			    else if (ev.xvisibility.state == VisibilityFullyObscured)
+			      {
+				 int w, h;
+				 
+				 evas_get_drawable_size(e, &w, &h);
+				 evas_clear_obscured_rects(e);
+				 evas_add_obscured_rect(e, 0, 0, w, h);
+			      }
+			    else if (ev.xvisibility.state == VisibilityPartiallyObscured)
+			      {
+				 obscure(e);
+			      }
 			    break;
 			 case EnterNotify:
 			    if (e == evas_view)
@@ -806,6 +908,11 @@ handle_events(void)
 	while (XPending(display));
 	/* stuff to do outside events */
 	animate(val);
+	if (had_expose)
+	  {
+/*	     obscure(evas_control);*/
+	     obscure(evas_view);
+	  }
 	/* display any changes */
 	evas_render(evas_control);
 	evas_render(evas_view);