graphics.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 /* graphics */
  25
  26 /* these graphics routines wrap video.c low level stuff */
  27
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <stdarg.h>
  32 #include <math.h>
  33
  34 #include <list.h>
  35 #include <util.h>
  36 #include <kernel.h>
  37 #include <video.h>
  38 #include <graphics.h>
  39 #include <loader.h>
  40 #include <camera.h>
  41
  42
  43 /* graphics data */
  44 sprite* sprites[MAX_SPRITES];
  45 int sprite_count = 0;
  46
  47 animation* animations[MAX_ANIMATIONS];
  48 int anim_count = 0;
  49
  50 int minifont_gfx = 0;
  51
  52
  53
  54 int stage_enabled = 0;
  55
  56
  57
  58 void graphics_init(){
  59         int i;
  60         minifont_gfx = load_gfx("gfx/smallfont.tga");
  61         for(i=0; i<MAX_ANIMATIONS; i++){
  62                 animations[i] = NULL;
  63         }
  64 }
  65
  66
  67 /* drawing */
  68
  69 void draw_sprite(sprite* spr){
  70         int x = spr->x - camera_x();
  71         int y = spr->y - camera_y();
  72         int W = spr->w;
  73         int H = spr->h;
  74         int X = spr->frame.x;
  75         int Y = spr->frame.y;
  76         int g = spr->gfxid;
  77         draw_gfx(g, x, y, X, Y, W, H);
  78 }
  79
  80 /*
  81    void draw_screen(zone* z, int si, int sj){
  82    struct screen* scr = z->screens+si+z->w*sj;
  83    int G = z->tileset;
  84    int x = si*20*16 - camera.x;
  85    int y = sj*15*16 - camera.y;
  86
  87    for(int j=0; j < 15; j++){
  88    for(int i=0; i < 20; i++){
  89    if(x > 320 || y > 240 || x < -16 || y < -16) continue;
  90    int id = scr->tiles[i][j].id;
  91    if(id != 0){
  92    int X = id&7;
  93    int Y = id>>3;
  94    draw_gfx(G, x, y, X, Y, 16, 16);
  95    }
  96    else{
  97 //draw background
  98 }
  99 x += 16;
 100 }
 101 x -= 320;
 102 y += 16;
 103 }
 104 }*/
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114 void draw_small_text(char* str, int x, int y){
 115         char* c;
 116         for(c=str; *c; c++){
 117                 int X = *c & 0x0f;
 118                 int Y = *c >> 4;
 119                 draw_gfx_raw(minifont_gfx, x, y, X*4, Y*9, 3, 8);
 120                 x+=4;
 121         }
 122 }
 123
 124
 125
 126 void printf_small(int x, int y, char* format, ...){
 127         char str[128];
 128         va_list ap;
 129         va_start(ap, format);
 130         vsnprintf(str, 128, format, ap);
 131         va_end(ap);
 132         str[127]='\0';
 133         draw_small_text(str, x, y);
 134 }
 135
 136
 137
 138
 139 void draw_sprites(){
 140         int i;
 141         for(i=0; i<sprite_count; i++){
 142                 draw_sprite(sprites[i]);
 143         }
 144 }
 145
 146 void draw_final(){
 147         //fps_draw();
 148         update_video();
 149         clear_video();
 150 }
 151
 152
 153
 154
 155
 156
 157 void animate_sprite(int i){
 158         sprite* spr = sprites[i];
 159
 160 //      spr->frame_counter += dt;
 161         animation* ani = animations[spr->anim];
 162
 163
 164         while(spr->frame_counter > ani->frame_lens[spr->current_frame]){
 165                 spr->frame_counter -= ani->frame_lens[spr->current_frame];
 166                 spr->current_frame++;
 167                 if(spr->current_frame == ani->frame_count){
 168                         spr->current_frame = 0;
 169                 }
 170                 spr->frame = ani->frames[spr->current_frame];
 171         }
 172
 173         //if(spr->update) spr->update(spr, spr->userdata);
 174 }
 175
 176 void animate_sprites(){
 177         int i;
 178         for(i=0; i<sprite_count; i++){
 179                 animate_sprite(i);
 180         }
 181 }
 182
 183
 184
 185
 186 int load_sprite(char* path, int id){
 187         int i;
 188
 189         reader* rd = loader_open(path);
 190         if(!rd){
 191                 return -1;
 192         }
 193
 194         animation* ani = xmalloc(sizeof(animation));
 195
 196         char str[256];
 197         int w, h;
 198         int frame_count;
 199         int loop_mode;
 200
 201         loader_scanline(rd,"%256s",str);
 202         loader_scanline(rd,"%d %d %d %d",&w,&h,&loop_mode,&frame_count);
 203
 204         ani->frame_lens = xmalloc(frame_count*sizeof(short));
 205         ani->frames = xmalloc(frame_count*sizeof(struct frame));
 206         ani->frame_count = frame_count;
 207
 208         int g = load_gfx(str);
 209         if(g < 0)
 210                 return -1;
 211
 212         ani->gfxid = g;
 213
 214         //int W = gfx[g].w;
 215         //int H = gfx[g].h;
 216         int W = gfx_width(g);
 217         int H = gfx_height(g);
 218         ani->w = w;
 219         ani->h = h;
 220
 221         for(i=0; i < frame_count; i++){
 222                 int l, x, y;
 223                 loader_scanline(rd, "%d %d %d", &l, &x, &y);
 224                 ani->frame_lens[i] = l;
 225                 ani->frames[i].x = x;
 226                 ani->frames[i].y = y;
 227                 ani->frames[i].x0 = ((double)x)/W;
 228                 ani->frames[i].y0 = ((double)y)/H;
 229                 ani->frames[i].x1 = ((double)(x+w))/W;
 230                 ani->frames[i].y1 = ((double)(y+h))/W;
 231         }
 232
 233         loader_close(rd);
 234         animations[id] = ani;
 235         return 0;
 236 }
 237
 238
 239
 240
 241 /********************/
 242 /* graphics control */
 243 /********************/
 244
 245 sprite* enable_sprite(int sprnum){
 246         if(!animations[sprnum]){
 247                 fatal_error("enable_sprite: you just tried to enable sprite with type %d, which does not exist\n",sprnum);
 248         }
 249         if(sprite_count == MAX_SPRITES){
 250                 /* need a priority based way to create important sprites if full */
 251                 return NULL;
 252         }
 253         sprite* spr = xmalloc(sizeof(sprite));
 254         animation* ani = animations[sprnum];
 255
 256         spr->number = sprite_count;
 257         spr->frame_counter = 0;
 258         spr->current_frame = 0;
 259         spr->frame = ani->frames[0];
 260         spr->gfxid = ani->gfxid;
 261         spr->anim = sprnum;
 262         spr->x = 0;
 263         spr->y = 0;
 264         spr->w = ani->w;
 265         spr->h = ani->h;
 266         //spr->vx = 0;
 267         //spr->vy = 0;
 268         //spr->update = NULL;
 269         //spr->userdata = NULL;
 270
 271         sprites[sprite_count++] = spr;
 272         return spr;
 273 }
 274
 275 void disable_sprite(sprite* spr){
 276         sprite* tmp = sprites[spr->number];
 277         sprites[spr->number] = sprites[sprite_count--];
 278         free(tmp);
 279 }
 280
 281 sprite* copy_sprite(sprite* spr){
 282         if(sprite_count == MAX_SPRITES){
 283                 /* need way to make important sprites when full */
 284                 return NULL;
 285         }
 286         sprite* copy = xmalloc(sizeof(sprite));
 287         *copy = *spr;
 288         sprites[sprite_count++] = copy;
 289         return copy;
 290 }
 291
 292
 293
 294 void enable_stage(int yn){
 295         stage_enabled = yn;
 296 }
 297
 298
 299
 300 int load_bitmap(char* filename){
 301         int g = load_gfx(filename);
 302         return g;
 303 }
 304
 305 void draw_bitmap(int id, int x, int y){
 306         int W = gfx_width(id);
 307         int H = gfx_height(id);
 308         draw_gfx(id, x, y, 0, 0, W, H);
 309 }