1 files changed, 30 insertions, 3 deletions
diff --git a/src/ray.c b/src/ray.c
index ad312f4..cf5d179 100644
--- a/src/ray.c
+++ b/src/ray.c
@@ -45,14 +45,41 @@ window\n");
 	EndDrawing();
 }
 
+static int
+min(int x, int y)
+{
+	if (x < y)
+		return x;
+	else
+		return y;
+}
+
 void
 display_calc(int x, int y)
 {
-	char text[32] = {0};
-	sprintf(text, "%d + %d", x, y);
+	char txt[32] = {0};
+	int win_width, win_height;
+	int txt_width;
+	int font_size;
+
+	sprintf(txt, "%d + %d", x, y);
+
+	win_width = GetScreenWidth();
+	win_height = GetScreenHeight();
+
+	font_size = min(win_height/3, 40);
+	txt_width = MeasureText(txt, font_size);
+
+	if (txt_width > win_width)
+	{
+		float scale = txt_width/win_width;
+		font_size = font_size/scale;
+		txt_width = MeasureText(txt, font_size);
+	}
+
 	BeginDrawing();
 	ClearBackground(RAYWHITE);
-	DrawText(text, DEFAULT_WIDTH/2, DEFAULT_HEIGHT/2, 40, LIGHTGRAY);
+	DrawText(txt, (win_width-txt_width)/2, win_height/6, font_size, LIGHTGRAY);
 	EndDrawing();
 }