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         "###   s#\n"
  26         "### ####\n"
  27         "###    #\n"
  28         "##     #\n"
  29         "##     #\n"
  30         "##     #\n"
  31         "## ### #\n"
  32         "## ### #\n"
  33         "##     #\n"
  34         "#### ###\n"
  35         "########\n";
  36
  37 static struct xvertex tm_floor[] __attribute__((section(".rodata"))) = {
  38         {0x10000, -0x10000, 0x10000,    0, 0x10000, 0,  210},
  39         {-0x10000, -0x10000, 0x10000,   0, 0x10000, 0,  210},
  40         {-0x10000, -0x10000, -0x10000,  0, 0x10000, 0,  210},
  41         {0x10000, -0x10000, -0x10000,   0, 0x10000, 0,  210}
  42 };
  43
  44
  45 static struct level *lvl;
  46
  47 static struct player player;
  48
  49
  50 void gamescr(void)
  51 {
  52         unsigned char *fb;
  53
  54         REG_DISPCNT = 4 | DISPCNT_BG2 | DISPCNT_OBJ | DISPCNT_FB1;
  55
  56         vblperf_setcolor(0xff);
  57
  58         lvl = init_level(testlvl);
  59
  60         xgl_init();
  61
  62         memset(&player, 0, sizeof player);
  63         player.y = 0x60000;
  64
  65         select_input(BN_DPAD | BN_A | BN_B);
  66
  67         mask(INTR_VBLANK);
  68         screen_vblank = vblank;
  69         unmask(INTR_VBLANK);
  70
  71         nframes = 0;
  72         for(;;) {
  73                 backbuf = ++nframes & 1;
  74                 fb = (unsigned char*)vram[backbuf];
  75
  76                 polyfill_framebuffer(fb, 240, 160);
  77                 fillblock_16byte(fb, 0, 240 * 160 / 16);
  78
  79                 update();
  80                 draw();
  81
  82                 vblperf_end();
  83                 wait_vblank();
  84                 present(backbuf);
  85                 vblperf_begin();
  86         }
  87 }
  88
  89 static void update(void)
  90 {
  91         uint16_t bnstate;
  92
  93         bnstate = get_input();
  94
  95         player_input(&player, bnstate);
  96 }
  97
  98 static void draw(void)
  99 {
 100         xgl_load_identity();
 101         xgl_rotate_x(player.phi);
 102         xgl_rotate_y(player.theta);
 103         xgl_translate(player.x, 0, player.y);
 104         xgl_rotate_y(X_QPI);
 105
 106         xgl_draw(XGL_QUADS, tm_floor, sizeof tm_floor / sizeof *tm_floor);
 107 }
 108
 109 __attribute__((noinline, target("arm"), section(".iwram")))
 110 static void vblank(void)
 111 {
 112         num_vbl++;
 113 }