git.mutantstargoat.com Git - gbajam22/blob - src/gamescr.c

   1 #include <stdlib.h>
   2 #include <string.h>
   3 #include "gbaregs.h"
   4 #include "game.h"
   5 #include "dma.h"
   6 #include "util.h"
   7 #include "intr.h"
   8 #include "input.h"
   9 #include "player.h"
  10 #include "sprite.h"
  11 #include "debug.h"
  12 #include "level.h"
  13 #include "xgl.h"
  14 #include "polyfill.h"
  15
  16 static void update(void);
  17 static void draw(void);
  18 static void vblank(void);
  19
  20 static int nframes, num_vbl, backbuf;
  21 static uint16_t *vram[] = { (uint16_t*)VRAM_LFB_FB0_ADDR, (uint16_t*)VRAM_LFB_FB1_ADDR };
  22
  23 static const char *testlvl =
  24         "################\n"
  25         "################\n"
  26         "################\n"
  27         "################\n"
  28         "################\n"
  29         "#######   s#####\n"
  30         "####### ########\n"
  31         "#######    #####\n"
  32         "######     #####\n"
  33         "######     #####\n"
  34         "######     #####\n"
  35         "###### ### #####\n"
  36         "###### ### #####\n"
  37         "######     #####\n"
  38         "######## #######\n"
  39         "################\n"
  40         "################\n"
  41         "################\n"
  42         "################\n"
  43         "################\n";
  44
  45 static struct xvertex tm_floor[] __attribute__((section(".rodata"))) = {
  46         {0x10000, -0x10000, 0x10000,    0, 0x10000, 0,  210},
  47         {-0x10000, -0x10000, 0x10000,   0, 0x10000, 0,  210},
  48         {-0x10000, -0x10000, -0x10000,  0, 0x10000, 0,  210},
  49         {0x10000, -0x10000, -0x10000,   0, 0x10000, 0,  210}
  50 };
  51
  52
  53 static struct level *lvl;
  54
  55 static struct player player;
  56
  57
  58 void gamescr(void)
  59 {
  60         int i;
  61         unsigned char *fb;
  62         uint16_t *cmap;
  63
  64         REG_DISPCNT = 4 | DISPCNT_BG2 | DISPCNT_OBJ | DISPCNT_FB1;
  65
  66         vblperf_setcolor(1);
  67
  68         lvl = init_level(testlvl);
  69
  70         xgl_init();
  71
  72         memset(&player, 0, sizeof player);
  73         player.phi = 0x100;
  74
  75         cmap = (uint16_t*)CRAM_BG_ADDR;
  76         *cmap++ = 0;
  77         for(i=1; i<255; i++) {
  78                 *cmap++ = rand();
  79         }
  80         *cmap = 0xffff;
  81
  82
  83         select_input(BN_DPAD | BN_A | BN_B);
  84
  85         mask(INTR_VBLANK);
  86         screen_vblank = vblank;
  87         unmask(INTR_VBLANK);
  88
  89         nframes = 0;
  90         for(;;) {
  91                 backbuf = ++nframes & 1;
  92                 fb = (unsigned char*)vram[backbuf];
  93
  94                 polyfill_framebuffer(fb, 240, 160);
  95                 fillblock_16byte(fb, 0, 240 * 160 / 16);
  96
  97                 update();
  98                 draw();
  99
 100                 vblperf_end();
 101                 wait_vblank();
 102                 present(backbuf);
 103                 vblperf_begin();
 104         }
 105 }
 106
 107 static void update(void)
 108 {
 109         uint16_t bnstate;
 110
 111         bnstate = get_input();
 112
 113         player_input(&player, bnstate);
 114
 115         upd_vis(lvl, &player);
 116 }
 117
 118 static void draw(void)
 119 {
 120         int i, x, y;
 121         struct cell *cell;
 122
 123         xgl_load_identity();
 124         /*xgl_translate(0, 0, 0x100000);*/
 125         xgl_rotate_x(player.phi);
 126         xgl_rotate_y(player.theta);
 127         xgl_translate(player.x, 0, player.y);
 128
 129         for(i=0; i<lvl->numvis; i++) {
 130                 cell = lvl->vis[i];
 131
 132                 x = (int32_t)(cell->x - player.cx) << 17;
 133                 y = -(int32_t)(cell->y - player.cy) << 17;
 134
 135                 xgl_push_matrix();
 136                 xgl_translate(x, 0, y);
 137                 xgl_index(i + 1);
 138                 xgl_draw(XGL_QUADS, tm_floor, sizeof tm_floor / sizeof *tm_floor);
 139                 xgl_pop_matrix();
 140         }
 141 }
 142
 143 __attribute__((noinline, target("arm"), section(".iwram")))
 144 static void vblank(void)
 145 {
 146         num_vbl++;
 147 }