xlib_playground

commit 816b14c55ca8ae15c60c1f00f7284dc8e38bc273
parent ea937ad07b4b0b0d6ec2263d79e253f31a625d19
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Tue, 10 Jan 2023 10:48:44 +0900

Disable drawing outside the screen.

Diffstat:
M
ex9/main.c
 | 
12
+++++++-----

1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/ex9/main.c b/ex9/main.c
@@ -260,7 +260,6 @@ game_play(void)
 #endif
 
 		x_clear_area();
-		// TODO: disable drawing outside of window.
 		for (olc = ol; olc != NULL; olc = olc->next) {
 			draw_object_scroll((struct Object *)olc->item, scroll_dst);
 		}
@@ -460,10 +459,13 @@ void
 draw_object_scroll(const struct Object *o, int sd)
 {
 	if (o->shape == SRECTANGLE) {
-		x_draw_rectangle(o->color,
-						 o->p.x - sd, o->p.y,
-						 o->body.rectangle.w,
-						 o->body.rectangle.h);
+		if (sd - o->body.rectangle.w <= o->p.x &&
+			o->p.x < WIN_WIDTH + sd) {
+			x_draw_rectangle(o->color,
+				o->p.x - sd, o->p.y,
+				o->body.rectangle.w,
+				o->body.rectangle.h);
+		}
 	} else {
 		fprintf(stderr, "draw_object_scroll: Drawing object other than"
 						"rectangle is not implemented yet.\n");