From 877d378710337e7b89b015e3901e467fbcff53be Mon Sep 17 00:00:00 2001
From: Jonathan Gordon <rockbox@jdgordon.info>
Date: Tue, 16 Feb 2010 05:24:27 +0000
Subject: Reuse the backdrop buffers if 2 skins use the same backdrop (on the
 same screen of course)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24690 a1c6a512-1295-4272-9138-f99709370657
---
 apps/gui/skin_engine/skin_backdrops.c | 119 ++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 apps/gui/skin_engine/skin_backdrops.c

(limited to 'apps/gui/skin_engine/skin_backdrops.c')

diff --git a/apps/gui/skin_engine/skin_backdrops.c b/apps/gui/skin_engine/skin_backdrops.c
new file mode 100644
index 0000000000..b057935241
--- /dev/null
+++ b/apps/gui/skin_engine/skin_backdrops.c
@@ -0,0 +1,119 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id: skin_tokens.c 24526 2010-02-05 23:58:53Z jdgordon $
+ *
+ * Copyright (C) 2010 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.
+ *
+ ****************************************************************************/
+
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "settings.h"
+#include "skin_buffer.h"
+#include "wps_internals.h"
+#include "skin_engine.h"
+
+#if (LCD_DEPTH > 1) || (defined(HAVE_REMOTE_LCD) && (LCD_REMOTE_DEPTH > 1))
+
+static struct skin_backdrop {
+    char name[MAX_FILENAME+1];
+    char *buffer;
+    enum screen_type screen;
+} backdrops[SKINNABLE_SCREENS_COUNT*NB_SCREENS];
+
+void skin_backdrop_init(void)
+{
+    int i;
+    for(i=0;i<SKINNABLE_SCREENS_COUNT*NB_SCREENS;i++)
+    {
+        backdrops[i].name[0] = '\0';
+        backdrops[i].buffer = NULL;
+    }
+}
+
+/* load a backdrop into the skin buffer.
+ * reuse buffers if the file is already loaded */
+char* skin_backdrop_load(char* backdrop, char *bmpdir, enum screen_type screen)
+{
+    int i;
+    struct skin_backdrop *bdrop = NULL;
+    char filename[MAX_PATH];
+    size_t buf_size;
+    bool loaded = false;
+#if defined(HAVE_REMOTE_LCD) && (LCD_REMOTE_DEPTH > 1)
+    if (screen == SCREEN_REMOTE)
+        buf_size = REMOTE_LCD_BACKDROP_BYTES;
+    else
+#endif
+        buf_size = LCD_BACKDROP_BYTES;
+    
+    if (backdrop[0] == '-')
+    {
+#if NB_SCREENS > 1
+        if (screen == SCREEN_REMOTE)
+        {
+            return NULL; /* remotes don't have a backdrop setting (yet!) */
+        }
+        else
+#endif
+        {
+            if (!global_settings.backdrop_file[0])
+            {
+                return NULL; /* backdrop setting not set */
+            }
+            snprintf(filename, sizeof(filename), "%s/%s.bmp",
+                     BACKDROP_DIR, global_settings.backdrop_file);
+        }
+    }
+    else
+    {
+        get_image_filename(backdrop, bmpdir, filename, sizeof(filename));
+    }
+    
+    for(i=0;i<SKINNABLE_SCREENS_COUNT*NB_SCREENS;i++)
+    {
+        if (!strcmp(backdrops[i].name, backdrop) && backdrops[i].screen == screen)
+        {
+            return backdrops[i].buffer;
+        }
+        else if (backdrops[i].buffer == NULL)
+        {
+            bdrop = &backdrops[i];
+        }
+    }
+    if (!bdrop)
+        return NULL; /* too many backdrops loaded */
+    
+    bdrop->buffer = skin_buffer_alloc(buf_size);
+    if (!bdrop->buffer)
+        return NULL;
+    loaded = screens[screen].backdrop_load(filename, bdrop->buffer);
+    bdrop->screen = screen;
+    strlcpy(bdrop->name, backdrop, MAX_FILENAME+1);
+    bdrop->name[MAX_FILENAME] = '\0';
+    
+    return loaded ? bdrop->buffer : NULL;
+}
+#else
+
+void skin_backdrop_init(void)
+{
+}
+#endif
+
-- 
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