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[libpng16] Reverted the fix of byte order in png_do_read_filler() with 16-bit

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input that was made in version 1.6.17beta01, to preserve legacy
behavior even though it was incorrect.  Instead, added new API
png_set_filter_16() and png_set_add_alpha_16() that set a flag to
make png_do_read_filter() interpret the filler bytes properly.
This commit is contained in:
Glenn Randers-Pehrson
2015-09-23 22:08:04 -05:00
parent d6eb4b71ac
commit efe4e5d10d
13 changed files with 141 additions and 65 deletions
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8
contrib/libtests/pngvalid.c
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@@ -1,7 +1,7 @@
/* pngvalid.c - validate libpng by constructing then reading png files.
*
* Last changed in libpng 1.6.18 [(PENDING RELEASE)]
* Last changed in libpng 1.5.24 [(PENDING RELEASE)]
* Copyright (c) 2014-2015 Glenn Randers-Pehrson
* Written by John Cunningham Bowler
*
@@ -3578,7 +3578,7 @@ check_interlace_type(int const interlace_type)
#define CAN_WRITE_INTERLACE\
PNG_LIBPNG_VER >= 10700 || defined PNG_WRITE_INTERLACING_SUPPORTED
/* Make a standardized image given a an image colour type, bit depth and
/* Make a standardized image given an image colour type, bit depth and
* interlace type. The standard images have a very restricted range of
* rows and heights and are used for testing transforms rather than image
* layout details. See make_size_images below for a way to make images
@@ -8039,7 +8039,7 @@ image_transform_png_set_filler_set(const image_transform *this,
RANDOMIZE(data.filler);
data.flags = random_choice();
png_set_filler(pp, data.filler, data.flags);
png_set_filler_16(pp, data.filler, data.flags);
/* The standard display handling stuff also needs to know that
* there is a filler, so set that here.
@@ -8112,7 +8112,7 @@ image_transform_png_set_add_alpha_set(const image_transform *this,
RANDOMIZE(data.filler);
data.flags = random_choice();
png_set_add_alpha(pp, data.filler, data.flags);
png_set_add_alpha_16(pp, data.filler, data.flags);
this->next->set(this->next, that, pp, pi);
}