$NetBSD: patch-aa,v 1.4 2011/11/24 13:57:21 joerg Exp $

Not compatible with png-1.4.

--- CompareArgs.cpp.orig	2007-03-16 06:17:17.000000000 +0000
+++ CompareArgs.cpp
@@ -17,6 +17,8 @@ if not, write to the Free Software Found
 #include "CompareArgs.h"
 #include "RGBAImage.h"
 #include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
 static const char* copyright = 
 "PerceptualDiff version 1.0, Copyright (C) 2006 Yangli Hector Yee\n\
@@ -35,8 +37,6 @@ static const char *usage =
 \t-gamma g       : Value to convert rgb into linear space (default 2.2)\n\
 \t-luminance l   : White luminance (default 100.0 cdm^-2)\n\
 \t-output o.ppm  : Write difference to the file o.ppm\n\
-\n\
-\n Note: Input files can also be in the PNG format\
 \n";
 
 CompareArgs::CompareArgs()
@@ -69,26 +69,18 @@ bool CompareArgs::Parse_Args(int argc, c
 		if (i == 1) {
 			ImgA = RGBAImage::ReadTiff(argv[1]);
 			if (!ImgA) {
-				ImgA = RGBAImage::ReadPNG(argv[1]);
-				if (!ImgA)
-				{
 					ErrorStr = "FAIL: Cannot open ";
 					ErrorStr += argv[1];
 					ErrorStr += "\n";
 					return false;
-				}
 			}
 		} else if (i == 2) {			
 			ImgB = RGBAImage::ReadTiff(argv[2]);
 			if (!ImgB) {
-				ImgB = RGBAImage::ReadPNG(argv[2]);
-				if (!ImgB)
-				{
 					ErrorStr = "FAIL: Cannot open ";
 					ErrorStr += argv[2];
 					ErrorStr += "\n";
 					return false;
-				}
 			}
 		} else {
 			if (strstr(argv[i], "-fov")) {