X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=retrocrawl;a=blobdiff_plain;f=src%2Fgame.c;fp=src%2Fgame.c;h=37c39b2e252255fc5987f11acbedc36e8fc6091d;hp=97c1895be7f7647790e37fbbba43332d541b3a0b;hb=196421f047414a192f285c8e98346a4595da2d46;hpb=af94a88e5de76c4b00df102f82643b4b64cb529a

diff --git a/src/game.c b/src/game.c
index 97c1895..37c39b2 100644
--- 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;