sprite test

[retrocrawl] / src / game.c

diff --git a/src/game.c b/src/game.c
index 97c1895..37c39b2 100644 (file)
--- a/src/game.c
+++ b/src/game.c
@@ -1,6 +1,7 @@
 #include <string.h>
 #include "game.h"
 #include "gfx.h"
+#include "copper.h"
 #include "data.h"
 
 #include "hwregs.h"    /* XXX */
@@ -10,9 +11,22 @@
 
 void draw_tile(int tid, int x, int y, int light);
 
+static uint16_t *sprdata[NUM_HWSPRITES];
+static uint16_t nullspr[] = {
+       0x2000, 0x2100,
+       0x0000, 0x0000,
+       0x0000, 0x0000
+};
+
+#define SPR_POS(x, y) \
+       (((uint16_t)((x) + 0x40) & 0xff) | ((uint16_t)((y) + 0x2c) << 8))
+
 
 int game_init(void)
 {
+       int i, sprpos[] = {136, 76};
+       uint32_t nullspr_addr = (intptr_t)nullspr;
+
        REG_COLOR0 = 0x221;
        REG_COLOR1 = 0x222;
        REG_COLOR2 = 0x332;
@@ -22,6 +36,42 @@ int game_init(void)
        REG_COLOR6 = 0x654;
        REG_COLOR7 = 0x765;
 
+       for(i=0; i<16; i++) {
+               REG_COLOR_PTR[i + 16] = sprpal[i];
+       }
+
+       sprdata[0] = spr0a;
+       sprdata[1] = spr0b;
+       sprdata[2] = spr1a;
+       sprdata[3] = spr1b;
+       sprdata[4] = spr2a;
+       sprdata[5] = spr2b;
+
+       for(i=0; i<8; i++) {
+               int reg = REGN_SPR0PTH + i * 4;
+               if(i < NUM_HWSPRITES) {
+                       uint16_t sx, sy, vstop;
+                       /* initialize active sprites, and set the sprite pointers */
+                       uint32_t addr = (intptr_t)sprdata[i];
+                       add_copper(COPPER_MOVE(reg, addr >> 16));
+                       add_copper(COPPER_MOVE(reg + 2, addr));
+
+                       sx = 0x80 + sprpos[0] + (i >> 1) * 16;
+                       sy = 0x2c + sprpos[1];
+                       vstop = sy + SPRITE_HEIGHT;
+
+                       sprdata[i][0] = (sx >> 1) | (sy << 8);
+                       sprdata[i][1] = (vstop << 8) | ((vstop >> 7) & 2) |
+                               (sx & 1) | ((i & 1) ? 0x80 : 0);
+               } else {
+                       /* point the sprite pointers to the null sprite for the rest */
+                       add_copper(COPPER_MOVE(reg, nullspr_addr >> 16));
+                       add_copper(COPPER_MOVE(reg + 2, nullspr_addr));
+               }
+       }
+
+       *copperlist_end = COPPER_END;
+
        return 0;
 }
 
@@ -32,6 +82,8 @@ void game_draw(void)
 {
        int i, j, xoffs, yoffs, ntiles;
 
+       /* reset sprite data */
+
        yoffs = 0;
        for(i=0; i<YTILES; i++) {
                xoffs = i & 1 ? TILE_W / 2 : 0;