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[libpng16] tests backported from libpng 1.7

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This updates libpng16 with all the test changes from libpng17,
including changes to pngvalid.c to ensure that the original,
distributed, version of contrib/visupng/cexcept.h can be used.

pngvalid contains the correction to the use of SAVE/STORE_
UNKNOWN_CHUNKS; a bug revealed by changes in libpng 1.7.  More
tests contain the --strict option to detect warnings and the
pngvalid-standard test has been corrected so that it does not
turn on progresive-read (there is a separate test which does
that.)

Some signed/unsigned fixes have been made.

Signed-off-by: John Bowler <jbowler@acm.org>
This commit is contained in:
John Bowler
2015-09-15 15:38:52 -07:00
parent 1e16e8829d
commit c3e7e7d715
19 changed files with 687 additions and 467 deletions
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4
contrib/visupng/PngFile.c
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@@ -136,7 +136,7 @@ BOOL PngLoadImage (PTSTR pstrFileName, png_byte **ppbImageData,
/* create the two png(-info) structures */
png_ptr = png_create_read_struct(png_get_libpng_ver(NULL), NULL,
png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING, NULL,
(png_error_ptr)png_cexcept_error, (png_error_ptr)NULL);
if (!png_ptr)
{
@@ -313,7 +313,7 @@ BOOL PngSaveImage (PTSTR pstrFileName, png_byte *pDiData,
/* prepare the standard PNG structures */
png_ptr = png_create_write_struct(png_get_libpng_ver(NULL), NULL,
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL,
(png_error_ptr)png_cexcept_error, (png_error_ptr)NULL);
if (!png_ptr)
{