Pixel picking

nasu6.c

@@ -28,6 +28,7 @@ typedef struct Brush {
 static int SCREEN_WIDTH = 512 + PAD * 2;
 static int SCREEN_HEIGHT = 512 + PAD * 2;
 static int FPS = 30;
+unsigned char tilelt[] = {0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};
 
 unsigned char buffer[1024 * 4];
 int ZOOM = 4;
@@ -129,12 +130,12 @@ write(int tx, int ty, int px, int py)
 {
 	int id = tx + ty * 16;
 	int pid = px + py * 8;
-	int pix = id * 16;
-	pix += py;
+	int row = id * 16 + py;
 
-	printf("#%d [%d:%d](%d,%d)\n", id, tx, ty, px, py);
+	buffer[row] |= tilelt[px];
+
+	printf("#%d [%d:%d](%d,%d) = %d\n", id, tx, ty, px, py, buffer[row]);
 
-	buffer[pix] = 0xFF;
 	update();
 }