From 2ca40471be05851582e72ff47189fa4164ff329a Mon Sep 17 00:00:00 2001
From: kramm <kramm>
Date: Sun, 13 Jan 2008 09:39:23 +0000
Subject: [PATCH] fixed bug with y-direction predictors in the first scanline
---
lib/png.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
diff --git a/lib/png.c b/lib/png.c
index fac4f77..739b895 100644
--- a/lib/png.c
+++ b/lib/png.c
@@ -619,6 +619,9 @@ EXPORT int getPNG(const char*sname, int*destwidth, int*destheight, unsigned char
int x,y;
int pos=0;
*destdata = data2;
+
+ unsigned char* firstline = malloc(header.width*4);
+ memset(firstline,0,header.width*4);
for(y=0;y<header.height;y++) {
int mode = imagedata[pos++]; //filter mode
unsigned char*src;
@@ -639,8 +642,7 @@ EXPORT int getPNG(const char*sname, int*destwidth, int*destheight, unsigned char
}
if(!y) {
- memset(data2,0,header.width*4);
- old = &data2[y*header.width*4];
+ old = firstline;
} else {
old = &data2[(y-1)*header.width*4];
}
@@ -661,6 +663,7 @@ EXPORT int getPNG(const char*sname, int*destwidth, int*destheight, unsigned char
}
}
}
+ free(firstline);
free(imagedata);
} else if(header.mode == 0 || header.mode == 3) {
COL*rgba = 0;
--
1.7.10.4