apps/gui/skin_engine/skin_fonts.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id: skin_tokens.c 24526 2010-02-05 23:58:53Z jdgordon $
   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 <string.h>
  25 #include <stdlib.h>
  26
  27 #include "file.h"
  28 #include "settings.h"
  29 #include "font.h"
  30 #include "skin_buffer.h"
  31 #include "skin_fonts.h"
  32 #define FONT_SIZE 10000
  33
  34
  35 static struct skin_font_info {
  36     struct font font;
  37     int font_id;
  38     char name[MAX_PATH];
  39     char *buffer;
  40     int ref_count; /* how many times has this font been loaded? */
  41 } font_table[MAXUSERFONTS];
  42
  43 /* need this to know if we should be closing font fd's on the next init */
  44 static bool first_load = true;
  45
  46 void skin_font_init(void)
  47 {
  48     int i;
  49     for(i=0;i<MAXUSERFONTS;i++)
  50     {
  51         if (!first_load)
  52             font_unload(font_table[i].font_id);
  53         font_table[i].font_id = -1;
  54         font_table[i].name[0] = '\0';
  55         font_table[i].buffer = NULL;
  56         font_table[i].ref_count = 0;
  57     }
  58     first_load = false;
  59 }
  60
  61 /* load a font into the skin buffer. return the font id. */
  62 int skin_font_load(char* font_name)
  63 {
  64     int i;
  65     struct font *pf;
  66     struct skin_font_info *font = NULL;
  67     char filename[MAX_PATH];
  68
  69     if (!strcmp(font_name, global_settings.font_file))
  70         return FONT_UI;
  71 #ifdef HAVE_REMOTE_LCD
  72     if (!strcmp(font_name, global_settings.remote_font_file))
  73         return FONT_UI_REMOTE;
  74 #endif
  75     for(i=0;i<MAXUSERFONTS;i++)
  76     {
  77         if (font_table[i].font_id >= 0 && !strcmp(font_table[i].name, font_name))
  78         {
  79             font_table[i].ref_count++;
  80             return font_table[i].font_id;
  81         }
  82         else if (!font && font_table[i].font_id == -1)
  83         {
  84             font = &font_table[i];
  85         }
  86     }
  87     if (!font)
  88         return -1; /* too many fonts loaded */
  89
  90     pf = &font->font;
  91     if (!font->buffer)
  92     {
  93         pf->buffer_start = skin_buffer_alloc(FONT_SIZE);
  94         if (!pf->buffer_start)
  95             return -1;
  96         font->buffer = pf->buffer_start;
  97     }
  98     else
  99     {
 100         pf->buffer_start = font->buffer;
 101     }
 102     pf->buffer_size = FONT_SIZE;
 103
 104     snprintf(filename, MAX_PATH, FONT_DIR "/%s.fnt", font_name);
 105     strcpy(font->name, font_name);
 106
 107     pf->fd = -1;
 108     font->font_id = font_load(pf, filename);
 109
 110     if (font->font_id < 0)
 111         return -1;
 112     font->ref_count = 1;
 113
 114     return font->font_id;
 115 }
 116
 117 /* unload a skin font. If a font has been loaded more than once it wont actually
 118  * be unloaded untill all references have been unloaded */
 119 void skin_font_unload(int font_id)
 120 {
 121     int i;
 122     for(i=0;i<MAXUSERFONTS;i++)
 123     {
 124         if (font_table[i].font_id == font_id)
 125         {
 126             if (--font_table[i].ref_count == 0)
 127             {
 128                 font_unload(font_id);
 129                 font_table[i].font_id = -1;
 130                 font_table[i].name[0] = '\0';
 131             }
 132             return;
 133         }
 134     }
 135 }
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