X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=retrocrawl;a=blobdiff_plain;f=src%2Fgame.c;fp=src%2Fgame.c;h=b4baecad05ed7cdeb92d617ac469fa8b15ae8ce3;hp=0000000000000000000000000000000000000000;hb=cab072d239d772d1c3445612d2599da36b087b25;hpb=03ec5d69f5f53b61e8b6aefbcd23b0b258c6b60a

diff --git a/src/game.c b/src/game.c
new file mode 100644
index 0000000..b4baeca
--- /dev/null
+++ b/src/game.c
@@ -0,0 +1,90 @@
+#include <string.h>
+#include "game.h"
+#include "data_test.h"
+#include "gfx.h"
+
+#define TILE_W	32
+#define TILE_H	16
+
+void draw_tile(int tid, int x, int y, int light);
+void convert_tile_data(unsigned char *dest, const char *src);
+
+static unsigned char test_tiles[2][TILE_W * TILE_H / 8 * NBPL];
+
+int game_init(void)
+{
+	int i;
+
+	for(i=0; i<2; i++) {
+		convert_tile_data(test_tiles[i], test_tiles_cpix[i][0]);
+	}
+	return 0;
+}
+
+void game_draw(void)
+{
+	draw_tile(0, 32, 16, 0);
+}
+
+
+void draw_tile(int tid, int x, int y, int light)
+{
+	int i;
+
+	unsigned char *dest = bplptr[0] + (y * SCANSZ * NBPL) + x / 8;
+	unsigned char *src = test_tiles[tid];
+
+	for(i=0; i<TILE_H * NBPL; i++) {
+		memcpy(dest, src, TILE_W / 8);
+		dest += SCANSZ;
+		src += TILE_W / 8;
+	}
+}
+
+static inline int charpix_color(char c)
+{
+	switch(c) {
+	case '#':
+		return 1;
+	case 'x':
+		return 2;
+	case '@':
+		return 3;
+	case 'o':
+		return 4;
+	default:
+	case '.':
+		break;
+	}
+	return 0;
+}
+
+#define TILE_SCANSZ	(TILE_W / 8)
+void convert_tile_data(unsigned char *dest, const char *src)
+{
+	int i, j, k;
+	unsigned char *bptr[NBPL];
+
+	for(i=0; i<NBPL; i++) {
+		bptr[i] = dest + TILE_SCANSZ * i;
+	}
+
+	for(i=0; i<TILE_H; i++) {
+		for(j=0; j<TILE_W; j++) {
+			int col = charpix_color(*src++);
+
+			for(k=0; k<NBPL; k++) {
+				*bptr[k] = (*bptr[k] << 1) | (col & 1);
+				col >>= 1;
+
+				if((j & 7) == 7) {
+					bptr[k]++;
+				}
+			}
+		}
+
+		for(j=0; j<NBPL; j++) {
+			bptr[j] += TILE_SCANSZ * (NBPL - 1);
+		}
+	}
+}