offscreen bitmaps: implement the delete list

libxrdp/libxrdp.c

@@ -758,12 +758,12 @@ libxrdp_orders_send_brush(struct xrdp_session* session,
 /*****************************************************************************/
 int EXPORT_CC
 libxrdp_orders_send_create_os_surface(struct xrdp_session* session, int id,
-                                      int width, int height, int num_del_list,
-                                      int* del_list)
+                                      int width, int height,
+                                      struct list* del_list)
 {
   return xrdp_orders_send_create_os_surface
-               ((struct xrdp_orders*)(session->orders), id, width, height,
-                num_del_list, del_list);
+               ((struct xrdp_orders*)(session->orders), id,
+                width, height, del_list);
 }
 
 /*****************************************************************************/

libxrdp/libxrdp.h

@@ -389,8 +389,8 @@ xrdp_orders_send_brush(struct xrdp_orders* self, int width, int height,
                        int bpp, int type, int size, char* data, int cache_id);
 int APP_CC
 xrdp_orders_send_create_os_surface(struct xrdp_orders* self, int id,
-                                   int width, int height, int num_del_list,
-                                   int* del_list);
+                                   int width, int height,
+                                   struct list* del_list);
 int APP_CC
 xrdp_orders_send_switch_os_surface(struct xrdp_orders* self, int id);
 

libxrdp/libxrdpinc.h

@@ -178,8 +178,8 @@ libxrdp_orders_send_brush(struct xrdp_session* session,
                           int size, char* data, int cache_id);
 int EXPORT_CC
 libxrdp_orders_send_create_os_surface(struct xrdp_session* session, int id,
-                                      int width, int height, int num_del_list,
-                                      int* del_list);
+                                      int width, int height,
+                                      struct list* del_list);
 int EXPORT_CC
 libxrdp_orders_send_switch_os_surface(struct xrdp_session* session, int id);
 

libxrdp/xrdp_orders.c

@@ -1975,16 +1975,19 @@ xrdp_orders_send_brush(struct xrdp_orders* self, int width, int height,
 /* send an off screen bitmap entry */
 int APP_CC
 xrdp_orders_send_create_os_surface(struct xrdp_orders* self, int id,
-                                   int width, int height, int num_del_list,
-                                   int* del_list)
+                                   int width, int height,
+                                   struct list* del_list)
 {
   int order_flags;
   int cache_id;
   int flags;
   int index;
   int bytes;
+  int num_del_list;
 
   bytes = 7;
+  num_del_list = del_list->count;
+  g_writeln("xrdp_orders_send_create_os_surface: num_del_list %d", num_del_list);
   if (num_del_list > 0)
   {
     bytes += 2;
@@ -2010,7 +2013,7 @@ xrdp_orders_send_create_os_surface(struct xrdp_orders* self, int id,
     out_uint16_le(self->out_s, num_del_list);
     for (index = 0; index < num_del_list; index++)
     {
-      cache_id = del_list[index] & 0x7fff;
+      cache_id = list_get_item(del_list, index) & 0x7fff;
       out_uint16_le(self->out_s, cache_id);
     }
   }

xrdp/xrdp.h

@@ -27,6 +27,7 @@
 #include "arch.h"
 #include "parse.h"
 #include "trans.h"
+#include "list.h"
 #include "libxrdpinc.h"
 #include "xrdp_types.h"
 #include "xrdp_constants.h"
@@ -34,7 +35,6 @@
 #include "os_calls.h"
 #include "ssl_calls.h"
 #include "thread_calls.h"
-#include "list.h"
 #include "file.h"
 #include "file_loc.h"
 #include "xrdp_client_info.h"

xrdp/xrdp_cache.c

@@ -43,6 +43,7 @@ xrdp_cache_create(struct xrdp_wm* owner,
   self->bitmap_cache_persist_enable = client_info->bitmap_cache_persist_enable;
   self->bitmap_cache_version = client_info->bitmap_cache_version;
   self->pointer_cache_entries = client_info->pointer_cache_entries;
+  self->xrdp_os_del_list = list_create();
   return self;
 }
 
@@ -78,6 +79,7 @@ xrdp_cache_delete(struct xrdp_cache* self)
   {
     xrdp_bitmap_delete(self->os_bitmap_items[i].bitmap);
   }
+  list_delete(self->xrdp_os_del_list);
 
   g_free(self);
 }
@@ -564,12 +566,21 @@ int APP_CC
 xrdp_cache_remove_os_bitmap(struct xrdp_cache* self, int rdpindex)
 {
   struct xrdp_os_bitmap_item* bi;
+  int index;
 
   if ((rdpindex < 0) || (rdpindex >= 2000))
   {
     return 1;
   }
   bi = self->os_bitmap_items + rdpindex;
+  if (bi->bitmap->tab_stop)
+  {
+    index = list_index_of(self->xrdp_os_del_list, rdpindex);
+    if (index == -1)
+    {
+      list_add_item(self->xrdp_os_del_list, rdpindex);
+    }
+  }
   xrdp_bitmap_delete(bi->bitmap);
   g_memset(bi, 0, sizeof(struct xrdp_os_bitmap_item));
   return 0;

xrdp/xrdp_painter.c

@@ -52,6 +52,8 @@ int APP_CC
 wm_painter_set_target(struct xrdp_painter* self)
 {
   int surface_index;
+  int index;
+  struct list* del_list;
 
   if (self->wm->target_surface->type == WND_TYPE_SCREEN)
   {
@@ -68,10 +70,15 @@ wm_painter_set_target(struct xrdp_painter* self)
     {
       if (self->wm->target_surface->tab_stop == 0) /* tab_stop is hack */
       {
+        del_list = self->wm->cache->xrdp_os_del_list;
+        index = list_index_of(del_list, surface_index);
+        list_remove_item(del_list, index);
         libxrdp_orders_send_create_os_surface(self->session, surface_index,
                                self->wm->target_surface->width,
-                               self->wm->target_surface->height, 0, 0);
+                               self->wm->target_surface->height,
+                               del_list);
         self->wm->target_surface->tab_stop = 1;
+        list_clear(del_list);
       }
       libxrdp_orders_send_switch_os_surface(self->session, surface_index);
       self->wm->current_surface_index = surface_index;

xrdp/xrdp_types.h

@@ -184,6 +184,7 @@ struct xrdp_cache
   int brush_stamp;
   struct xrdp_brush_item brush_items[64];
   struct xrdp_os_bitmap_item os_bitmap_items[2000];
+  struct list* xrdp_os_del_list;
 };
 
 struct xrdp_mm