apps/gui/skin_engine/skin_backdrops.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2010 Jonathan Gordon
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include "config.h"
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include "string-extra.h"
  26 #include "settings.h"
  27 #include "skin_buffer.h"
  28 #include "wps_internals.h"
  29 #include "skin_engine.h"
  30
  31 #if (LCD_DEPTH > 1) || (defined(HAVE_REMOTE_LCD) && (LCD_REMOTE_DEPTH > 1))
  32
  33 static struct skin_backdrop {
  34     char name[MAX_FILENAME+1];
  35     char *buffer;
  36     enum screen_type screen;
  37 } backdrops[SKINNABLE_SCREENS_COUNT*NB_SCREENS];
  38
  39 void skin_backdrop_init(void)
  40 {
  41     int i;
  42     for(i=0;i<SKINNABLE_SCREENS_COUNT*NB_SCREENS;i++)
  43     {
  44         backdrops[i].name[0] = '\0';
  45         backdrops[i].buffer = NULL;
  46     }
  47 }
  48
  49 /* load a backdrop into the skin buffer.
  50  * reuse buffers if the file is already loaded */
  51 char* skin_backdrop_load(char* backdrop, char *bmpdir, enum screen_type screen)
  52 {
  53     int i;
  54     struct skin_backdrop *bdrop = NULL;
  55     char filename[MAX_PATH];
  56     size_t buf_size;
  57     bool loaded = false;
  58 #if defined(HAVE_REMOTE_LCD) && (LCD_REMOTE_DEPTH > 1)
  59     if (screen == SCREEN_REMOTE)
  60         buf_size = REMOTE_LCD_BACKDROP_BYTES;
  61     else
  62 #endif
  63         buf_size = LCD_BACKDROP_BYTES;
  64
  65     if (backdrop[0] == '-')
  66     {
  67 #if NB_SCREENS > 1
  68         if (screen == SCREEN_REMOTE)
  69         {
  70             return NULL; /* remotes don't have a backdrop setting (yet!) */
  71         }
  72         else
  73 #endif
  74         {
  75             char settings_bdrop = global_settings.backdrop_file[0];
  76             if (settings_bdrop == '\0' || settings_bdrop == '-')
  77             {
  78                 return NULL; /* backdrop setting not set */
  79             }
  80             snprintf(filename, sizeof(filename), "%s/%s.bmp",
  81                      BACKDROP_DIR, global_settings.backdrop_file);
  82         }
  83     }
  84     else
  85     {
  86         get_image_filename(backdrop, bmpdir, filename, sizeof(filename));
  87     }
  88
  89     for(i=0;i<SKINNABLE_SCREENS_COUNT*NB_SCREENS;i++)
  90     {
  91         if (!strcmp(backdrops[i].name, backdrop) && backdrops[i].screen == screen)
  92         {
  93             return backdrops[i].buffer;
  94         }
  95         else if (!bdrop && backdrops[i].buffer == NULL)
  96         {
  97             bdrop = &backdrops[i];
  98         }
  99     }
 100     if (!bdrop)
 101         return NULL; /* too many backdrops loaded */
 102
 103     bdrop->buffer = skin_buffer_alloc(buf_size);
 104     if (!bdrop->buffer)
 105         return NULL;
 106     loaded = screens[screen].backdrop_load(filename, bdrop->buffer);
 107     bdrop->screen = screen;
 108     strlcpy(bdrop->name, backdrop, MAX_FILENAME+1);
 109
 110     return loaded ? bdrop->buffer : NULL;
 111 }
 112 #else
 113
 114 void skin_backdrop_init(void)
 115 {
 116 }
 117 #endif