mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Libraries/Steel/c/resspr

   1 /*
   2  * resspr.c
   3  *
   4  * Loading sprites
   5  *
   6  * © 1994-1998 Straylight
   7  */
   8
   9 /*----- Licensing note ----------------------------------------------------*
  10  *
  11  * This file is part of Straylight's Steel library.
  12  *
  13  * Steel is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2, or (at your option)
  16  * any later version.
  17  *
  18  * Steel is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with Steel.  If not, write to the Free Software Foundation,
  25  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  */
  27
  28 #include <stdlib.h>
  29
  30 #include "os.h"
  31 #include "resspr.h"
  32 #include "mem.h"
  33 #include "msgs.h"
  34 #include "werr.h"
  35 #include "res.h"
  36
  37 static sprite_area *resspr__area=(sprite_area *)1;
  38
  39 /*
  40  * void resspr_init(void)
  41  *
  42  * Use
  43  *  Loads the applications `Sprites' file into memory.
  44  */
  45
  46 void resspr_init(void)
  47 {
  48   os_filestr f;
  49   int size;
  50
  51   /* --- Find the file and it's length --- */
  52
  53   f.name=res_name("Sprites");
  54   f.action=17;
  55   if (os_file(&f) || f.action!=1)
  56     return;
  57
  58   /* --- Create a buffer the right size --- *
  59    *
  60    * The sprite file size may not be word aligned -- cope with this.
  61    */
  62
  63   size=(f.start+7) & ~3;
  64   resspr__area=mem_alloc(size);
  65   if (!resspr__area)
  66   {
  67     werr(FALSE,msgs_lookup("ressprNEM:Not enough memory to load sprites."));
  68     exit(0);
  69   }
  70
  71   /* --- Load the sprites into memory --- */
  72
  73   resspr__area->size=size;
  74   f.action=16;
  75   f.loadaddr=((int)resspr__area)+4;
  76   f.execaddr=0;
  77   os_file(&f);
  78 }
  79
  80 /*
  81  * sprite_area *resspr_area(void)
  82  *
  83  * Use
  84  *  Returns the address of the application's sprite area.
  85  */
  86
  87 sprite_area *resspr_area(void)
  88 {
  89   return (resspr__area);
  90 }