src/backgbmp.cpp

   1 // ------------------------------------------------------------------
   2 // backgbmp.cpp
   3 // System for handling level backgrounds
   4 // ------------------------------------------------------------------
   5 // By Kronoman - In loving memory of my father
   6 // Copyright (c) 2004, Kronoman
   7 // ------------------------------------------------------------------
   8
   9 #include "backgbmp.h"
  10 #include "gerror.h"
  11 #include "filehelp.h"
  12
  13 CBackground::CBackground()
  14 {
  15         bmp_in_ram = NULL;
  16         bmp_default = NULL;
  17         data_loaded = NULL;
  18         free_memory();
  19 }
  20
  21 CBackground::~CBackground()
  22 {
  23         free_memory();
  24
  25         if (bmp_default != NULL)
  26                 destroy_bitmap(bmp_default);
  27 }
  28
  29 BITMAP *CBackground::get_background(char *filename, int index)
  30 {
  31         char str[1024];
  32         DATAFILE *data = NULL;
  33         char tmp_file_buf[2048];
  34
  35         where_is_the_filename(tmp_file_buf, filename);
  36
  37         // use the cache if it is present
  38         if (index == index_loaded)
  39         {
  40                 if (ustrcmp(tmp_file_buf, file_loaded) == 0)
  41                         return bmp_in_ram;
  42         }
  43
  44         free_memory();
  45
  46         usprintf(str, "B%d_BMP", index);
  47         data = load_datafile_object(tmp_file_buf, str);
  48
  49         if (data != NULL)
  50         {
  51                 usprintf(file_loaded, "%s", tmp_file_buf);
  52                 index_loaded = index;
  53
  54                 data_loaded = data;
  55                 bmp_in_ram = (BITMAP *)data->dat;
  56                 return bmp_in_ram;
  57         }
  58
  59
  60         return bmp_default;
  61 }
  62
  63 void CBackground::free_memory()
  64 {
  65         if (data_loaded != NULL)
  66                 unload_datafile_object(data_loaded);
  67
  68         data_loaded = NULL;
  69
  70         bmp_in_ram = NULL;
  71
  72         if (bmp_default != NULL)
  73                 destroy_bitmap(bmp_default);
  74
  75         bmp_default = create_bitmap(16, 16);
  76
  77         if (bmp_default == NULL)
  78                 raise_error("* FATAL ERROR * \nCBackgrounds::free_memory()\n\tCan't create default bitmap!");
  79
  80         clear(bmp_default);
  81
  82         file_loaded[0] = '\0';
  83
  84         index_loaded = -1;
  85 }
  86