fix presentation on x11

1 files changed, 9 insertions, 15 deletions

diff --git a/plat.c b/plat.c
index 3f2a007..50f3944 100644
--- a/plat.c
+++ b/plat.c
@@ -431,8 +431,8 @@ void app_rencpy(
 	int x, y, sj = 0;
 	int w = viewport_w * s;
 	int h = viewport_h * s;
-	int ex = sx + w;
-	int ey = sy + h;
+	int ex = mini(sx + w, max_pc_window_w);
+	int ey = mini(sy + h, max_pc_window_h);
 	for (y = sy; y < ey; y++, sj++) {
 		int sy = sj / s;
 		int si = 0;
@@ -449,7 +449,7 @@ void app_rencpy(
 		i->wi,
 		i->gc,
 		i->bb,
-		0,  0,
+		sx, sy,
 		sx, sy,
 		w,  h
 	);
@@ -472,19 +472,13 @@ void app_rencpy(
 }
 
 void app_end(App* a) {
-	int s = 1;
-	int m1, m2;
+	int s, x, y;
 	App_Internal* i = (App_Internal*)(&a[1]);
-	if (i->w < i->h) {
-		m1 = i->w;
-		m2 = viewport_w;
-	} else {
-		m1 = i->h;
-		m2 = viewport_h;
-	}
-	while (m2 * s < m1) s++; /* lol */
-	s = maxi(1, s - 1);
-	app_rencpy(a, i, 0, 0, s);
+	for (s = 1; viewport_w * s <= i->w && viewport_h * s <= i->h; s++);
+	if (s > 1) s--;
+	x = (i->w >> 1) - ((viewport_w * s) >> 1);
+	y = (i->h >> 1) - ((viewport_h * s) >> 1);
+	app_rencpy(a, i, x, y, s);
 	i->end = get_timer();
 	a->fps = 1000000000 / (i->end - i->begin);
 }