kernel.c

   1 /*
   2    Cantaveria - action adventure platform game
   3    Copyright (C) 2009 2010 Evan Rinehart
   4
   5    This program is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU General Public License
   7    as published by the Free Software Foundation; either version 2
   8    of the License, or (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to
  17
  18    The Free Software Foundation, Inc.
  19    51 Franklin Street, Fifth Floor
  20    Boston, MA  02110-1301, USA
  21
  22    evanrinehart@gmail.com
  23 */
  24 #include <stdlib.h>
  25
  26 #include <list.h>
  27 #include <util.h>
  28 #include <root.h>
  29 #include <boot.h>
  30
  31 #include <video.h>
  32 #include <input.h>
  33
  34 #include <console.h>
  35 #include <graphics.h> // ?
  36
  37 #include <gameover.h>
  38 #include <transfer.h>
  39 #include <kernel.h>
  40
  41 int dt = QUANTUM; /* this is a global variable */
  42
  43 static struct {
  44         void (*update)();
  45         void (*draw)();
  46         void (*press)(input in);
  47         void (*release)(input in);
  48 } handler;
  49
  50
  51 static void terminate(){
  52         loader_quit();
  53         audio_quit();
  54         video_quit();
  55 }
  56
  57 static void press(input in){ handler.press(in); }
  58 static void release(input in){ handler.release(in); }
  59
  60 void dispatch_error(const char* msg){
  61         error_msg("kernel.c dispatch_input: %s\n", msg);
  62 }
  63
  64 static void dispatch_input(){
  65         input in = get_input();
  66         while(in.type != NO_INPUT){
  67                 switch(in.type){
  68                         case BUTTON_PRESS: press(in); break;
  69                         case BUTTON_RELEASE: release(in); break;
  70                         case END_OF_PROGRAM: game_is_over(); break;
  71                         case SKIP_INPUT: dispatch_error("SKIP_INPUT is not supposed to come from generator"); break;
  72                         case INVALID_INPUT: dispatch_error("INVALID_INPUT produced in generator"); break;
  73                         case NO_INPUT: dispatch_error("NO_INPUT is impossible here"); break;
  74                 }
  75                 in = get_input();
  76         }
  77 }
  78
  79 void initialize(int argc, char* argv[]){
  80         video_init(argc, argv);
  81         seq_init();
  82         synth_init();
  83         audio_init();
  84         input_init("FIXME");
  85         loader_init();
  86         graphics_init();
  87         text_init();
  88         stage_init();
  89         rand_reset(RANDOM_SEED);
  90
  91         atexit(terminate);
  92
  93         setup_splash();
  94 }
  95
  96 void update(){
  97         dispatch_input();
  98         fps_update();
  99 //      console_clear();
 100         animate_sprites();
 101         handler.update();
 102 }
 103
 104 void draw(){
 105         handler.draw();
 106         console_draw();
 107         draw_final();
 108 }
 109
 110 void set_handler(
 111         void (*_update)(),
 112         void (*_draw)(),
 113         void (*_press)(input in),
 114         void (*_release)(input in)
 115 ){
 116         handler.update = _update;
 117         handler.draw = _draw;
 118         handler.press = _press;
 119         handler.release = _release;
 120 }