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[libpng16] Added note about png_get_rowbytes() being affected by transforms

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Glenn Randers-Pehrson
2017-07-03 11:11:44 -05:00
parent 89b8c133e7
commit b5c16f8bfc
2 changed files with 18 additions and 8 deletions
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9
libpng-manual.txt
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@@ -1,6 +1,6 @@
libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.6.31beta01 - June 28, 2017
libpng version 1.6.31beta01 - July 3, 2017
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -11,7 +11,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on:
libpng versions 0.97, January 1998, through 1.6.31beta01 - June 28, 2017
libpng versions 0.97, January 1998, through 1.6.31beta01 - July 3, 2017
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2017 Glenn Randers-Pehrson
@@ -1330,6 +1330,11 @@ in until png_read_end() has read the chunk data following the image.
rowbytes = png_get_rowbytes(png_ptr, info_ptr);
rowbytes - number of bytes needed to hold a row
This value, the bit_depth, color_type,
and the number of channels can change
if you use transforms such as
png_set_expand(). See
png_read_update_info(), below.
signature = png_get_signature(png_ptr, info_ptr);