more wps->skin engine work..

start redoing memory management in the skins to use a single larger buffer instead of lots of arrays for things like images and progressbars.
This commit removes the limit on the amount of progressbars allowed on the screen, still 1 per viewport, but unlimited otherwise(!)
Also a larger buffer for remote targets, same size for non-remote targets but very easy to make it bigger (technically removed the 52(?) image limit in skins, except still limited to 1 char identifiers)
Unlimited "string" tokens now (limit was 1024 which was rediculously wasteful)


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22350 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 51 insertions, 0 deletions

diff --git a/apps/gui/skin_engine/skin_buffer.h b/apps/gui/skin_engine/skin_buffer.h
new file mode 100644
index 0000000000..779f575689
--- /dev/null
+++ b/apps/gui/skin_engine/skin_buffer.h
@@ -0,0 +1,51 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: wps_parser.c 19880 2009-01-29 20:49:43Z mcuelenaere $
+ *
+ * Copyright (C) 2002 by Linus Nielsen Feltzing
+ * Copyright (C) 2009 Jonathan Gordon
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+
+#ifndef _SKIN_BUFFER_H_
+#define _SKIN_BUFFER_H_
+
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+/* int the global buffer */
+void skin_buffer_init(void);
+
+/* get the number of bytes currently being used */
+size_t skin_buffer_usage(void);
+
+/* Allocate size bytes from the buffer */
+void* skin_buffer_alloc(size_t size);
+
+
+/* Get a pointer to the skin buffer and the count of how much is free
+ * used to do your own buffer management. 
+ * Any memory used will be overwritten next time wps_buffer_alloc()
+ * is called unless skin_buffer_increment() is called first
+ */
+void* skin_buffer_grab(size_t *freespace);
+
+/* Use after skin_buffer_grab() to specify how much buffer was used */
+void skin_buffer_increment(size_t used);
+
+#endif /* _SKIN_BUFFER_H_ */