From 3afdc2e49020a3ec46e3c101fb6fede3a7f7c189 Mon Sep 17 00:00:00 2001
From: Pierre Joye <pajoye@php.net>
Date: Fri, 30 Dec 2005 01:19:32 +0000
Subject: [PATCH] - add some basic optimisations, usefull when you draw many
 horizontal or   vertical lines like in charts

---
 ext/gd/libgd/gd.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/ext/gd/libgd/gd.c b/ext/gd/libgd/gd.c
index 1ac09a76fc..66214dfe70 100644
--- a/ext/gd/libgd/gd.c
+++ b/ext/gd/libgd/gd.c
@@ -1029,6 +1029,22 @@ void gdImageLine (gdImagePtr im, int x1, int y1, int x2, int y2, int color)
 		return;
 	}
 
+	/* Vertical */
+	if (x1==x2) {
+		for (;y1 <= y2; y1++) {
+			gdImageSetPixel(im, x1,y1, color);
+		}
+		return;
+	}
+
+	/* Horizontal */
+	if (y1==y2) {
+		for (;x1 <= x2; x1++) {
+			gdImageSetPixel(im, x1,y1, color);
+		}
+		return;
+	}
+
 	/* gdAntiAliased passed as color: set anti-aliased line (AAL) global vars. */
 	if (color == gdAntiAliased) {
 		im->AAL_x1 = x1;
-- 
2.50.1