backend.h

   1 /*
   2    Cantaveria - action adventure platform game
   3    Copyright (C) 2009  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
  23 enum {
  24 ESCAPE_KEY,
  25 PAUSE_KEY,
  26
  27 LEFT_KEY,
  28 RIGHT_KEY,
  29 UP_KEY,
  30 DOWN_KEY,
  31
  32 FIRE_KEY,
  33 JUMP_KEY,
  34 INVENTORY_KEY,
  35 SPECIAL_KEY,
  36
  37 L_KEY,
  38 R_KEY,
  39 START_KEY,
  40 SELECT_KEY
  41 };
  42
  43 enum{
  44 FIRE_BUTTON,
  45 JUMP_BUTTON,
  46 INVENTORY_BUTTON,
  47 SPECIAL_BUTTON,
  48 L_BUTTON,
  49 R_BUTTON,
  50 START_BUTTON,
  51 SELECT_BUTTON
  52 };
  53
  54 enum{
  55 KEYUP,
  56 KEYDOWN,
  57 JOYMOVEX,
  58 JOYMOVEY,
  59 JOYPRESS,
  60 JOYRELEASE,
  61 FOOBAR
  62 };
  63
  64 #define JOY_MAX 32767
  65 #define JOY_MIN -32768
  66
  67 #define MAX_PLAYERS 6
  68
  69 #define dt 10
  70 #define DELAY_AMOUNT 1
  71
  72 #define SCREEN_W 320
  73 #define SCREEN_H 240
  74
  75 #define MAX_GFX 256
  76 #define MAX_SPRITES 256
  77 #define MAX_ANIMATIONS 256
  78
  79 #define COLOR_KEY 0x000000
  80
  81
  82 #define SAMPLE_RATE 44100
  83 #define BUFFER_SIZE 1024
  84
  85 struct frame{
  86   int x, y;
  87   double x0, y0, x1, y1;
  88 };
  89
  90 typedef struct sprite sprite;
  91 struct sprite {
  92   int number;
  93   int frame_counter;
  94   int current_frame;
  95   struct frame frame;
  96   int gfxid;
  97   int anim;
  98   int x, y, w, h, vx, vy;
  99   void (*update)(sprite*, void* ud);
 100   void* userdata;
 101 };
 102
 103 typedef struct {
 104   int w, h;
 105   int loop_mode;/*0 stopped, 1 once, 2 repeat, 3 pingpong, 4 evaporate*/
 106   int gfxid;
 107   int frame_count;
 108   short* frame_lens;
 109   struct frame* frames;
 110 } animation;
 111
 112
 113
 114 void backend_init(int argc, char* argv[]);
 115 void backend_quit();
 116
 117 void input(); /* pump event system */
 118 void draw();  /* draw all active graphics */
 119
 120
 121 int since(); /* ms since last time since() was called */
 122 void delay(int ms); /* wait ms ms */
 123
 124 int keynum(int name); /* get key number for key name */
 125 int butnum(int joy, int name); /* get button number for button name */
 126 void control(int type, int par1, int par2); /* automatic control */
 127
 128 int load_gfx(char* filename);
 129 int load_sprite(char* filename, int id);
 130 sprite* enable_sprite(int sprnum);
 131 void disable_sprite(sprite* spr);
 132 sprite* copy_sprite(sprite* spr);
 133
 134
 135 int load_sound(char* filename);
 136 void play_sound(int id);
 137 int load_music(char* filename);
 138 int play_music(int id);
 139
 140
 141 void load_map(char* filename);
 142 void unload_map();
 143
 144 void point_camera(int x, int y);
 145
 146 void animate_sprites();