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[libpng17] Corrected the test on user transform changes on read. It was in the

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png_set of the transform function, but that doesn't matter unless the
transform function changes the rowbuf size, and that is only valid if
transform_info is called.
This commit is contained in:
John Bowler 2013-04-12 22:10:38 -05:00 committed by Glenn Randers-Pehrson
parent ae1a5c811c
commit 066f9862f0
4 changed files with 20 additions and 6 deletions
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8
ANNOUNCE
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@ -1,5 +1,5 @@
Libpng 1.7.0beta07 - April 8, 2013
Libpng 1.7.0beta07 - April 13, 2013
This is not intended to be a public release. It will be replaced
within a few weeks by a public version or by another test version.
@ -236,11 +236,15 @@ Version 1.7.0beta06 [March 13, 2013]
technically valid, although a reasonable treatment of division would
show it to be incorrect.
Version 1.7.0beta07 [April 8, 2013]
Version 1.7.0beta07 [April 13, 2013]
Updated documentation of 1.5.x to 1.6.x changes in iCCP chunk handling.
Fixed incorrect warning of excess deflate data. End condition - the
warning would be produced if the end of the deflate stream wasn't read
in the last row. The warning is harmless.
Corrected the test on user transform changes on read. It was in the
png_set of the transform function, but that doesn't matter unless the
transform function changes the rowbuf size, and that is only valid if
transform_info is called.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

6
CHANGES
View File

@ -4523,11 +4523,15 @@ Version 1.7.0beta06 [March 13, 2013]
technically valid, although a reasonable treatment of division would
show it to be incorrect.
Version 1.7.0beta07 [April 8, 2013]
Version 1.7.0beta07 [April 13, 2013]
Updated documentation of 1.5.x to 1.6.x changes in iCCP chunk handling.
Fixed incorrect warning of excess deflate data. End condition - the
warning would be produced if the end of the deflate stream wasn't read
in the last row. The warning is harmless.
Corrected the test on user transform changes on read. It was in the
png_set of the transform function, but that doesn't matter unless the
transform function changes the rowbuf size, and that is only valid if
transform_info is called.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

3
pngrtran.c
View File

@ -1056,9 +1056,6 @@ png_set_read_user_transform_fn(png_structrp png_ptr, png_user_transform_ptr
{
png_debug(1, "in png_set_read_user_transform_fn");
if (!png_rtran_ok(png_ptr, 0))
return;
#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
png_ptr->transformations |= PNG_USER_TRANSFORM;
png_ptr->read_user_transform_fn = read_user_transform_fn;

9
pngtrans.c
View File

@ -784,6 +784,15 @@ png_set_user_transform_info(png_structrp png_ptr, png_voidp
if (png_ptr == NULL)
return;
#ifdef PNG_READ_USER_TRANSFORM_SUPPORTED
if ((png_ptr->mode & PNG_IS_READ_STRUCT) != 0 &&
(png_ptr->flags & PNG_FLAG_ROW_INIT) != 0)
png_app_error(png_ptr,
"info change after png_start_read_image or png_read_update_info");
return;
#endif
png_ptr->user_transform_ptr = user_transform_ptr;
png_ptr->user_transform_depth = (png_byte)user_transform_depth;
png_ptr->user_transform_channels = (png_byte)user_transform_channels;