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Imported from libpng-1.2.19beta24.tar

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This commit is contained in:
Glenn Randers-Pehrson
2007-07-14 14:43:24 -05:00
parent 67c75ee7f0
commit 80663032a9
65 changed files with 436 additions and 120 deletions
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7
pngwutil.c
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@@ -1,7 +1,7 @@
/* pngwutil.c - utilities to write a PNG file
*
* Last changed in libpng 1.2.19 July 10, 2007
* Last changed in libpng 1.2.19 July 14, 2007
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1998-2007 Glenn Randers-Pehrson
* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
@@ -1752,6 +1752,7 @@ png_write_start_row(png_structp png_ptr)
png_ptr->row_buf = (png_bytep)png_malloc(png_ptr, (png_uint_32)buf_size);
png_ptr->row_buf[0] = PNG_FILTER_VALUE_NONE;
#ifndef PNG_NO_WRITE_FILTERING
/* set up filtering buffer, if using this filter */
if (png_ptr->do_filter & PNG_FILTER_SUB)
{
@@ -1787,6 +1788,7 @@ png_write_start_row(png_structp png_ptr)
(png_ptr->rowbytes + 1));
png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH;
}
#endif /* PNG_NO_WRITE_FILTERING */
}
#ifdef PNG_WRITE_INTERLACING_SUPPORTED
@@ -2122,6 +2124,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
prev_row = png_ptr->prev_row;
best_row = row_buf = png_ptr->row_buf;
#ifndef PNG_NO_WRITE_FILTER
mins = PNG_MAXSUM;
/* The prediction method we use is to find which method provides the
@@ -2696,7 +2699,7 @@ png_write_find_filter(png_structp png_ptr, png_row_infop row_info)
best_row = png_ptr->paeth_row;
}
}
#endif /* PNG_NO_WRITE_FILTER */
/* Do the actual writing of the filtered row data from the chosen filter. */
png_write_filtered_row(png_ptr, best_row);