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[libpng17] Belatedly added Mans Rullgard and James Yu to the list of

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Contributing Authors.
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Glenn Randers-Pehrson 2015-07-25 21:06:28 -05:00
parent 47b6a93924
commit 1b3d312513
5 changed files with 73 additions and 143 deletions
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2
ANNOUNCE
View File

@ -849,6 +849,8 @@ Version 1.7.0beta64 [July 26, 2015]
Removed some unused WEIGHTED_FILTER macros from png.h and pngstruct.h
Rearranged png.h to put the major sections in the same order as
in libpng16.
Belatedly added Mans Rullgard and James Yu to the list of Contributing
Authors.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

2
CHANGES
View File

@ -5145,6 +5145,8 @@ Version 1.7.0beta64 [July 26, 2015]
Removed some unused WEIGHTED_FILTER macros from png.h and pngstruct.h
Rearranged png.h to put the major sections in the same order as
in libpng16.
Belatedly added Mans Rullgard and James Yu to the list of Contributing
Authors.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

48
LICENSE
View File

@ -10,21 +10,17 @@ this sentence.
This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.7.0beta64, June 6, 2015, are
Copyright (c) 2004, 2006-2015 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.2.5
with the following individual added to the list of Contributing Authors
Cosmin Truta
libpng versions 1.0.7, July 1, 2000, through 1.2.5 - October 3, 2002, are
Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
libpng versions 1.0.7, July 1, 2000, through 1.7.0beta64, July 26, 2015, are
Copyright (c) 2000-2002, 2004, 2006-2015 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.0.6
with the following individuals added to the list of Contributing Authors
with the following individuals added to the list of Contributing Authors:
Simon-Pierre Cadieux
Eric S. Raymond
Mans Rullgard
Cosmin Truta
Gilles Vollant
James Yu
and with the following additions to the disclaimer:
@ -36,17 +32,17 @@ and with the following additions to the disclaimer:
the user.
libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
Copyright (c) 1998, 1999 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-0.96,
with the following individuals added to the list of Contributing Authors:
Copyright (c) 1998-2000 Glenn Randers-Pehrson, and are distributed according
to the same disclaimer and license as libpng-0.96, with the following
individuals added to the list of Contributing Authors:
Tom Lane
Glenn Randers-Pehrson
Willem van Schaik
libpng versions 0.89, June 1996, through 0.96, May 1997, are
Copyright (c) 1996, 1997 Andreas Dilger
Distributed according to the same disclaimer and license as libpng-0.88,
Copyright (c) 1996-1997 Andreas Dilger, and are
distributed according to the same disclaimer and license as libpng-0.88,
with the following individuals added to the list of Contributing Authors:
John Bowler
@ -57,7 +53,7 @@ with the following individuals added to the list of Contributing Authors:
Tom Tanner
libpng versions 0.5, May 1995, through 0.88, January 1996, are
Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
For the purposes of this copyright and license, "Contributing Authors"
is defined as the following set of individuals:
@ -80,13 +76,13 @@ Permission is hereby granted to use, copy, modify, and distribute this
source code, or portions hereof, for any purpose, without fee, subject
to the following restrictions:
1. The origin of this source code must not be misrepresented.
1. The origin of this source code must not be misrepresented.
2. Altered versions must be plainly marked as such and must not
be misrepresented as being the original source.
2. Altered versions must be plainly marked as such and must not
be misrepresented as being the original source.
3. This Copyright notice may not be removed or altered from any
source or altered source distribution.
3. This Copyright notice may not be removed or altered from any
source or altered source distribution.
The Contributing Authors and Group 42, Inc. specifically permit, without
fee, and encourage the use of this source code as a component to
@ -94,18 +90,18 @@ supporting the PNG file format in commercial products. If you use this
source code in a product, acknowledgment is not required but would be
appreciated.
A "png_get_copyright" function is available, for convenient use in "about"
boxes and the like:
printf("%s",png_get_copyright(NULL));
printf("%s", png_get_copyright(NULL));
Also, the PNG logo (in PNG format, of course) is supplied in the
files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a
certification mark of the Open Source Initiative.
Libpng is OSI Certified Open Source Software. OSI Certified Open Source is
a certification mark of the Open Source Initiative. OSI has not addressed
the additional disclaimers inserted at version 1.0.7.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
June 6, 2015
July 26, 2015

45
libpng-manual.txt
View File

@ -1,6 +1,6 @@
libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.7.0beta64 - June 6, 2015
libpng version 1.7.0beta64 - July 26, 2015
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2015 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 1.7.0beta64 - June 6, 2015
libpng versions 0.97, January 1998, through 1.7.0beta64 - July 26, 2015
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2015 Glenn Randers-Pehrson
@ -3756,12 +3756,12 @@ png_image is a structure that describes the in-memory format of an image
when it is being read or define the in-memory format of an image that you
need to write. The "png_image" structure contains the following members:
png_controlp opaque Initialize to NULL, free with png_image_free
png_uint_32 version Set to PNG_IMAGE_VERSION
png_uint_32 width Image width in pixels (columns)
png_uint_32 height Image height in pixels (rows)
png_uint_32 format Image format as defined below
png_uint_32 flags A bit mask containing informational flags
png_controlp opaque Initialize to NULL, free with png_image_free
png_uint_32 colormap_entries; Number of entries in the color-map
png_uint_32 warning_or_error;
char message[64];
@ -4364,43 +4364,6 @@ is called for the first time.)
same as the value of filter_method used
in png_set_IHDR().
It is also possible to influence how libpng chooses from among the
available filters. This is done in one or both of two ways - by
telling it how important it is to keep the same filter for successive
rows, and by telling it the relative computational costs of the filters.
double weights[3] = {1.5, 1.3, 1.1},
costs[PNG_FILTER_VALUE_LAST] =
{1.0, 1.3, 1.3, 1.5, 1.7};
png_set_filter_heuristics(png_ptr,
PNG_FILTER_HEURISTIC_WEIGHTED, 3,
weights, costs);
The weights are multiplying factors that indicate to libpng that the
row filter should be the same for successive rows unless another row filter
is that many times better than the previous filter. In the above example,
if the previous 3 filters were SUB, SUB, NONE, the SUB filter could have a
"sum of absolute differences" 1.5 x 1.3 times higher than other filters
and still be chosen, while the NONE filter could have a sum 1.1 times
higher than other filters and still be chosen. Unspecified weights are
taken to be 1.0, and the specified weights should probably be declining
like those above in order to emphasize recent filters over older filters.
The filter costs specify for each filter type a relative decoding cost
to be considered when selecting row filters. This means that filters
with higher costs are less likely to be chosen over filters with lower
costs, unless their "sum of absolute differences" is that much smaller.
The costs do not necessarily reflect the exact computational speeds of
the various filters, since this would unduly influence the final image
size.
Note that the numbers above were invented purely for this example and
are given only to help explain the function usage. Little testing has
been done to find optimum values for either the costs or the weights.
This feature was removed from libpng-1.7.0 and later, because
we are not aware of anyone actually testing it.
Requesting debug printout
The macro definition PNG_DEBUG can be used to request debugging
@ -5353,7 +5316,7 @@ Other rules can be inferred by inspecting the libpng source.
XVII. Y2K Compliance in libpng
June 6, 2015
July 26, 2015
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.

119
libpng.3
View File

@ -1,4 +1,4 @@
.TH LIBPNG 3 "June 6, 2015"
.TH LIBPNG 3 "July 26, 2015"
.SH NAME
libpng \- Portable Network Graphics (PNG) Reference Library 1.7.0beta64
.SH SYNOPSIS
@ -115,6 +115,8 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.7.0beta64
\fBpng_byte png_get_libpng_ver (png_const_structp \fIpng_ptr\fP\fB);\fP
\fBint png_get_palette_max(png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fIinfo_ptr\fP\fB);\fP
\fBpng_voidp png_get_mem_ptr (png_const_structp \fIpng_ptr\fP\fB);\fP
\fBpng_uint_32 png_get_oFFs (png_const_structp \fP\fIpng_ptr\fP\fB, png_const_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fI*offset_x\fP\fB, png_uint_32 \fP\fI*offset_y\fP\fB, int \fI*unit_type\fP\fB);\fP
@ -359,6 +361,8 @@ libpng \- Portable Network Graphics (PNG) Reference Library 1.7.0beta64
\fBvoid png_set_oFFs (png_structp \fP\fIpng_ptr\fP\fB, png_infop \fP\fIinfo_ptr\fP\fB, png_uint_32 \fP\fIoffset_x\fP\fB, png_uint_32 \fP\fIoffset_y\fP\fB, int \fIunit_type\fP\fB);\fP
\fBint png_set_option(png_structrp \fP\fIpng_ptr\fP\fB, int \fP\fIoption\fP\fB, int \fIonoff\fP\fB);\fP
\fBvoid png_set_packing (png_structp \fIpng_ptr\fP\fB);\fP
\fBvoid png_set_packswap (png_structp \fIpng_ptr\fP\fB);\fP
@ -494,7 +498,7 @@ Following is a copy of the libpng-manual.txt file that accompanies libpng.
.SH LIBPNG.TXT
libpng-manual.txt - A description on how to use and modify libpng
libpng version 1.7.0beta64 - June 6, 2015
libpng version 1.7.0beta64 - July 26, 2015
Updated and distributed by Glenn Randers-Pehrson
<glennrp at users.sourceforge.net>
Copyright (c) 1998-2015 Glenn Randers-Pehrson
@ -505,7 +509,7 @@ libpng-manual.txt - A description on how to use and modify libpng
Based on:
libpng versions 0.97, January 1998, through 1.7.0beta64 - June 6, 2015
libpng versions 0.97, January 1998, through 1.7.0beta64 - July 26, 2015
Updated and distributed by Glenn Randers-Pehrson
Copyright (c) 1998-2015 Glenn Randers-Pehrson
@ -4250,12 +4254,12 @@ png_image is a structure that describes the in-memory format of an image
when it is being read or define the in-memory format of an image that you
need to write. The "png_image" structure contains the following members:
png_controlp opaque Initialize to NULL, free with png_image_free
png_uint_32 version Set to PNG_IMAGE_VERSION
png_uint_32 width Image width in pixels (columns)
png_uint_32 height Image height in pixels (rows)
png_uint_32 format Image format as defined below
png_uint_32 flags A bit mask containing informational flags
png_controlp opaque Initialize to NULL, free with png_image_free
png_uint_32 colormap_entries; Number of entries in the color-map
png_uint_32 warning_or_error;
char message[64];
@ -4858,43 +4862,6 @@ is called for the first time.)
same as the value of filter_method used
in png_set_IHDR().
It is also possible to influence how libpng chooses from among the
available filters. This is done in one or both of two ways - by
telling it how important it is to keep the same filter for successive
rows, and by telling it the relative computational costs of the filters.
double weights[3] = {1.5, 1.3, 1.1},
costs[PNG_FILTER_VALUE_LAST] =
{1.0, 1.3, 1.3, 1.5, 1.7};
png_set_filter_heuristics(png_ptr,
PNG_FILTER_HEURISTIC_WEIGHTED, 3,
weights, costs);
The weights are multiplying factors that indicate to libpng that the
row filter should be the same for successive rows unless another row filter
is that many times better than the previous filter. In the above example,
if the previous 3 filters were SUB, SUB, NONE, the SUB filter could have a
"sum of absolute differences" 1.5 x 1.3 times higher than other filters
and still be chosen, while the NONE filter could have a sum 1.1 times
higher than other filters and still be chosen. Unspecified weights are
taken to be 1.0, and the specified weights should probably be declining
like those above in order to emphasize recent filters over older filters.
The filter costs specify for each filter type a relative decoding cost
to be considered when selecting row filters. This means that filters
with higher costs are less likely to be chosen over filters with lower
costs, unless their "sum of absolute differences" is that much smaller.
The costs do not necessarily reflect the exact computational speeds of
the various filters, since this would unduly influence the final image
size.
Note that the numbers above were invented purely for this example and
are given only to help explain the function usage. Little testing has
been done to find optimum values for either the costs or the weights.
This feature was removed from libpng-1.7.0 and later, because
we are not aware of anyone actually testing it.
.SS Requesting debug printout
The macro definition PNG_DEBUG can be used to request debugging
@ -5847,7 +5814,7 @@ Other rules can be inferred by inspecting the libpng source.
.SH XVII. Y2K Compliance in libpng
June 6, 2015
July 26, 2015
Since the PNG Development group is an ad-hoc body, we can't make
an official declaration.
@ -6106,6 +6073,11 @@ the first widely used release:
1.6.16 16 10616 16.so.16.16[.0]
1.6.17beta01-06 16 10617 16.so.16.17[.0]
1.6.17rc01 16 10617 16.so.16.17[.0]
1.6.17 16 10617 16.so.16.17[.0]
1.6.18beta01-09 16 10618 16.so.16.18[.0]
1.6.18rc01-03 16 10618 16.so.16.18[.0]
1.6.18 16 10618 16.so.16.18[.0]
1.6.19beta01 16 10619 16.so.16.19[.0]
1.7.0alpha01-10 17 10700 17.so.17.0[.0]
1.7.0beta01-64 17 10700 17.so.17.0[.0]
@ -6164,7 +6136,7 @@ possible without all of you.
Thanks to Frank J. T. Wojcik for helping with the documentation.
Libpng version 1.7.0beta64 - June 6, 2015:
Libpng version 1.7.0beta64 - July 26, 2015:
Initially created in 1995 by Guy Eric Schalnat, then of Group 42, Inc.
Currently maintained by Glenn Randers-Pehrson (glennrp at users.sourceforge.net).
@ -6187,44 +6159,39 @@ this sentence.
This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.7.0beta64, June 6, 2015, are
Copyright (c) 2004,2006-2015 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.2.5
with the following individual added to the list of Contributing Authors
Cosmin Truta
libpng versions 1.0.7, July 1, 2000, through 1.2.5 - October 3, 2002, are
Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
libpng versions 1.0.7, July 1, 2000, through 1.7.0beta64, July 26, 2015, are
Copyright (c) 2000-2002, 2004, 2006-2015 Glenn Randers-Pehrson, and are
distributed according to the same disclaimer and license as libpng-1.0.6
with the following individuals added to the list of Contributing Authors
with the following individuals added to the list of Contributing Authors:
Simon-Pierre Cadieux
Eric S. Raymond
Mans Rullgard
Cosmin Truta
Gilles Vollant
James Yu
and with the following additions to the disclaimer:
There is no warranty against interference with your
enjoyment of the library or against infringement.
There is no warranty that our efforts or the library
will fulfill any of your particular purposes or needs.
This library is provided with all faults, and the entire
risk of satisfactory quality, performance, accuracy, and
effort is with the user.
There is no warranty against interference with your enjoyment of the
library or against infringement. There is no warranty that our
efforts or the library will fulfill any of your particular purposes
or needs. This library is provided with all faults, and the entire
risk of satisfactory quality, performance, accuracy, and effort is with
the user.
libpng versions 0.97, January 1998, through 1.0.6, March 20, 2000, are
Copyright (c) 1998, 1999 Glenn Randers-Pehrson
Distributed according to the same disclaimer and license as libpng-0.96,
with the following individuals added to the list of Contributing Authors:
Copyright (c) 1998-2000 Glenn Randers-Pehrson, and are distributed according
to the same disclaimer and license as libpng-0.96, with the following
individuals added to the list of Contributing Authors:
Tom Lane
Glenn Randers-Pehrson
Willem van Schaik
libpng versions 0.89, June 1996, through 0.96, May 1997, are
Copyright (c) 1996, 1997 Andreas Dilger
Distributed according to the same disclaimer and license as libpng-0.88,
Copyright (c) 1996-1997 Andreas Dilger, and are
distributed according to the same disclaimer and license as libpng-0.88,
with the following individuals added to the list of Contributing Authors:
John Bowler
@ -6235,7 +6202,7 @@ with the following individuals added to the list of Contributing Authors:
Tom Tanner
libpng versions 0.5, May 1995, through 0.88, January 1996, are
Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
Copyright (c) 1995-1996 Guy Eric Schalnat, Group 42, Inc.
For the purposes of this copyright and license, "Contributing Authors"
is defined as the following set of individuals:
@ -6258,13 +6225,13 @@ Permission is hereby granted to use, copy, modify, and distribute this
source code, or portions hereof, for any purpose, without fee, subject
to the following restrictions:
1. The origin of this source code must not be misrepresented.
1. The origin of this source code must not be misrepresented.
2. Altered versions must be plainly marked as such and
must not be misrepresented as being the original source.
2. Altered versions must be plainly marked as such and must not
be misrepresented as being the original source.
3. This Copyright notice may not be removed or altered from
any source or altered source distribution.
3. This Copyright notice may not be removed or altered from any
source or altered source distribution.
The Contributing Authors and Group 42, Inc. specifically permit, without
fee, and encourage the use of this source code as a component to
@ -6272,21 +6239,21 @@ supporting the PNG file format in commercial products. If you use this
source code in a product, acknowledgment is not required but would be
appreciated.
A "png_get_copyright" function is available, for convenient use in "about"
boxes and the like:
printf("%s",png_get_copyright(NULL));
printf("%s", png_get_copyright(NULL));
Also, the PNG logo (in PNG format, of course) is supplied in the
files "pngbar.png" and "pngbar.jpg (88x31) and "pngnow.png" (98x31).
Libpng is OSI Certified Open Source Software. OSI Certified Open Source is a
certification mark of the Open Source Initiative.
Libpng is OSI Certified Open Source Software. OSI Certified Open Source is
a certification mark of the Open Source Initiative. OSI has not addressed
the additional disclaimers inserted at version 1.0.7.
Glenn Randers-Pehrson
glennrp at users.sourceforge.net
June 6, 2015
July 26, 2015
.\" end of man page