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Set png_ptr->old_prev_row_size=0 to force prev_row to be cleared

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Glenn Randers-Pehrson
2009-05-16 08:47:20 -05:00
parent ba05bddf92
commit f4276c36c9
4 changed files with 15 additions and 8 deletions
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9
pngrutil.c
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@@ -1,7 +1,7 @@
/* pngrutil.c - utilities to read a PNG file
*
* Last changed in libpng 1.2.37 [May 15, 2009]
* Last changed in libpng 1.2.37 [May 16, 2009]
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2009 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -2913,12 +2913,13 @@ png_read_finish_row(png_structp png_ptr)
if (png_ptr->row_number < png_ptr->num_rows)
return;
/* Force prev_row to be cleared. */
png_ptr->old_prev_row_size=0;
#ifdef PNG_READ_INTERLACING_SUPPORTED
if (png_ptr->interlaced)
{
png_ptr->row_number = 0;
png_memset_check(png_ptr, png_ptr->prev_row, 0,
png_ptr->rowbytes + 1);
do
{
png_ptr->pass++;
@@ -3187,7 +3188,7 @@ defined(PNG_USER_TRANSFORM_PTR_SUPPORTED)
if (row_bytes + 64 > png_ptr->old_big_row_buf_size)
{
png_free(png_ptr, png_ptr->big_row_buf);
png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes + 64);
png_ptr->big_row_buf = (png_bytep)png_malloc(png_ptr, row_bytes + 64);
if (png_ptr->interlaced)
png_memset(png_ptr->big_row_buf, 0, row_bytes + 64);
png_ptr->row_buf = png_ptr->big_row_buf + 32;