From: Pierre Joye <pierre.php@gmail.com>
Date: Wed, 20 Mar 2013 11:29:47 +0000 (+0100)
Subject: - update the comment to match the code/features
X-Git-Tag: php-5.6.0alpha1~448^2~115^2
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=f0078897c7a76bf9332fb1c19aeb51a9e28bab9f;p=php

- update the comment to match the code/features
---

diff --git a/ext/gd/libgd/gd_interpolation.c b/ext/gd/libgd/gd_interpolation.c
index ab3e988a48..5ad5de6268 100644
--- a/ext/gd/libgd/gd_interpolation.c
+++ b/ext/gd/libgd/gd_interpolation.c
@@ -1,4 +1,5 @@
 /*
+ * The two pass scaling function is based on:
  * Filtered Image Rescaling
  * Based on Gems III
  *  - Schumacher general filtered image rescaling
@@ -13,6 +14,7 @@
  *
  * 	Initial sources code is avaibable in the Gems Source Code Packages:
  * 	http://www.acm.org/pubs/tog/GraphicsGems/GGemsIII.tar.gz
+ *
  */
 
 /*
@@ -34,6 +36,17 @@
 
 */
 
+/*
+	Additional functions are available for simple rotation or up/downscaling.
+	downscaling using the fixed point implementations are usually much faster
+	than the existing gdImageCopyResampled while having a similar or better
+	quality.
+	
+	For image rotations, the optimized versions have a lazy antialiasing for 
+	the edges of the images. For a much better antialiased result, the affine
+	function is recommended.
+*/
+
 /*
 TODO:
  - Optimize pixel accesses and loops once we have continuous buffer