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Commit 818d5930 authored by cutealien's avatar cutealien
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Update libpng to 1.6.21 (from 1.6.10) 


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5276 dfc29bdd-3216-0410-991c-e03cc46cb475
parent 82b5708f
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source/Irrlicht/libpng/ANNOUNCE
View file @ 818d5930
Libpng 1.6.10 - March 6, 2014
Libpng 1.6.21 - January 15, 2016
This is a public release of libpng, intended for use in production codes.
......@@ -8,80 +7,49 @@ Files available for download:
Source files with LF line endings (for Unix/Linux) and with a
"configure" script
libpng-1.6.10.tar.xz (LZMA-compressed, recommended)
libpng-1.6.10.tar.gz
libpng-1.6.21.tar.xz (LZMA-compressed, recommended)
libpng-1.6.21.tar.gz
Source files with CRLF line endings (for Windows), without the
"configure" script
lpng1610.7z (LZMA-compressed, recommended)
lpng1610.zip
/scratch/glennrp/Libpng16/lpng1621.7z (LZMA-compressed, recommended)
/scratch/glennrp/Libpng16/lpng1621.zip
Other information:
libpng-1.6.10-README.txt
libpng-1.6.10-LICENSE.txt
libpng-1.6.10-*.asc (armored detached GPG signatures)
Changes since the last public release (1.6.9):
Backported changes from libpng-1.7.0beta30 and beta31:
Fixed a large number of instances where PNGCBAPI was omitted from
function definitions.
Added pngimage test program for png_read_png() and png_write_png()
with two new test scripts.
Removed dependence on !PNG_READ_EXPAND_SUPPORTED for calling
png_set_packing() in png_read_png().
Fixed combination of ~alpha with shift. On read invert alpha, processing
occurred after shift processing, which causes the final values to be
outside the range that should be produced by the shift. Reversing the
order on read makes the two transforms work together correctly and mirrors
the order used on write.
Do not read invalid sBIT chunks. Previously libpng only checked sBIT
values on write, so a malicious PNG writer could therefore cause
the read code to return an invalid sBIT chunk, which might lead to
application errors or crashes. Such chunks are now skipped (with
chunk_benign_error).
Make png_read_png() and png_write_png() prototypes in png.h depend
upon PNG_READ_SUPPORTED and PNG_WRITE_SUPPORTED.
Support builds with unsupported PNG_TRANSFORM_* values. All of the
PNG_TRANSFORM_* values are always defined in png.h and, because they
are used for both read and write in some cases, it is not reliable
to #if out ones that are totally unsupported. This change adds error
detection in png_read_image() and png_write_image() to do a
png_app_error() if the app requests something that cannot be done
and it adds corresponding code to pngimage.c to handle such options
by not attempting to test them.
Moved redefines of png_error(), png_warning(), png_chunk_error(),
and png_chunk_warning() from pngpriv.h to png.h to make them visible
to libpng-calling applications.
Moved OS dependent code from arm/arm_init.c, to allow the included
implementation of the ARM NEON discovery function to be set at
build-time and provide sample implementations from the current code in the
contrib/arm-neon subdirectory. The __linux__ code has also been changed to
compile and link on Android by using /proc/cpuinfo, and the old linux code
is in contrib/arm-neon/linux-auxv.c. The new code avoids POSIX and Linux
dependencies apart from opening /proc/cpuinfo and is C90 compliant.
Check for info_ptr == NULL early in png_read_end() so we don't need to
run all the png_handle_*() and depend on them to return if info_ptr == NULL.
This improves the performance of png_read_end(png_ptr, NULL) and makes
it more robust against future programming errors.
Check for __has_extension before using it in pngconf.h, to
support older Clang versions (Jeremy Sequoia).
Treat CRC error handling with png_set_crc_action(), instead of with
png_set_benign_errors(), which has been the case since libpng-1.6.0beta18.
Use a user warning handler in contrib/gregbook/readpng2.c instead of default,
so warnings will be put on stderr even if libpng has CONSOLE_IO disabled.
Added png_ptr->process_mode = PNG_READ_IDAT_MODE in png_push_read_chunk
after recognizing the IDAT chunk, which avoids an infinite loop while
reading a datastream whose first IDAT chunk is of zero-length.
This fixes CERT VU#684412 and CVE-2014-0333.
Don't recognize known sRGB profiles as sRGB if they have been hacked,
but don't reject them and don't issue a copyright violation warning.
Moved some documentation from png.h to libpng.3 and libpng-manual.txt
Minor editing of contrib/arm-neon/README and contrib/examples/*.c
Fixed typos in the manual and in scripts/pnglibconf.dfa (CFLAGS -> CPPFLAGS
and PNG_USR_CONFIG -> PNG_USER_CONFIG).
Un-deprecated png_data_freer().
libpng-1.6.21-README.txt
libpng-1.6.21-LICENSE.txt
libpng-1.6.21-*.asc (armored detached GPG signatures)
Changes since the last public release (1.6.20):
Fixed syntax "$(command)" in tests/pngstest that some shells other than
bash could not parse (Bug report by Nelson Beebe). Use `command` instead.
Moved png_check_keyword() from pngwutil.c to pngset.c
Removed LE/BE dependencies in pngvalid, to 'fix' the current problem
in the BigEndian tests by not testing it, making the BE code the same
as the LE version.
Fixes to pngvalid for various reduced build configurations (eliminate unused
statics) and a fix for the case in rgb_to_gray when the digitize option
reduces graylo to 0, producing a large error.
Widened the 'limit' check on the internally calculated error limits in
the 'DIGITIZE' case (the code used prior to 1.7 for rgb_to_gray error
checks) and changed the check to only operate in non-release builds
(base build type not RC or RELEASE.)
Fixed undefined behavior in pngvalid.c, undefined because
(png_byte) << shift is undefined if it changes the signed bit
(because png_byte is promoted to int). The libpng exported functions
png_get_uint_32 and png_get_uint_16 handle this. (Bug reported by
David Drysdale as a result of reports from UBSAN in clang 3.8).
This changes pngvalid to use BE random numbers; this used to produce
errors but these should not be fixed as a result of the previous changes.
In projects/vstudio, combined readme.txt and WARNING into README.txt
Relocated assert() in contrib/tools/pngfix.c, bug found by American
Fuzzy Lop, reported by Brian Carpenter.
Marked 'limit' UNUSED in transform_range_check(). This only affects
release builds.
Worked around a false-positive Coverity issue in pngvalid.c.
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit
......@@ -90,4 +58,3 @@ to subscribe)
or to glennrp at users.sourceforge.net
Glenn R-P
#endif
source/Irrlicht/libpng/CHANGES
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source/Irrlicht/libpng/CMakeLists.txt
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# CMakeLists.txt
# Copyright (C) 2007-2013 Glenn Randers-Pehrson
# Copyright (C) 2007-2015 Glenn Randers-Pehrson
# This code is released under the libpng license.
# For conditions of distribution and use, see the disclaimer
......@@ -16,7 +16,7 @@ enable_testing()
set(PNGLIB_MAJOR 1)
set(PNGLIB_MINOR 6)
set(PNGLIB_RELEASE 10)
set(PNGLIB_RELEASE 21)
set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
......@@ -30,8 +30,7 @@ if(NOT WIN32)
PATHS /usr/lib /usr/local/lib
)
if(NOT M_LIBRARY)
message(STATUS
"math library 'libm' not found - floating point support disabled")
message(STATUS "math lib 'libm' not found; floating point support disabled")
endif()
else()
# not needed on windows
......@@ -39,22 +38,14 @@ else()
endif()
# COMMAND LINE OPTIONS
if(DEFINED PNG_SHARED)
option(PNG_SHARED "Build shared lib" ${PNG_SHARED})
else()
option(PNG_SHARED "Build shared lib" ON)
endif()
if(DEFINED PNG_STATIC)
option(PNG_STATIC "Build static lib" ${PNG_STATIC})
else()
option(PNG_STATIC "Build static lib" ON)
endif()
option(PNG_TESTS "Build libpng tests" YES)
option(PNG_SHARED "Build shared lib" ON)
option(PNG_STATIC "Build static lib" ON)
option(PNG_TESTS "Build libpng tests" ON)
# Many more configuration options could be added here
option(PNG_DEBUG "Build with debug output" NO)
option(PNGARG "Disable ANSI-C prototypes" NO)
option(PNG_FRAMEWORK "Build OS X framework" OFF)
option(PNG_DEBUG "Build with debug output" OFF)
option(PNGARG "Disable ANSI-C prototypes" OFF)
# SET LIBNAME
set(PNG_LIB_NAME png${PNGLIB_MAJOR}${PNGLIB_MINOR})
......@@ -134,7 +125,7 @@ if(PNG_SHARED)
endif()
if(PNG_STATIC)
# does not work without changing name
# does not work without changing name
set(PNG_LIB_NAME_STATIC ${PNG_LIB_NAME}_static)
add_library(${PNG_LIB_NAME_STATIC} STATIC ${libpng_sources})
list(APPEND PNG_LIB_TARGETS ${PNG_LIB_NAME_STATIC})
......@@ -145,10 +136,27 @@ if(PNG_STATIC)
target_link_libraries(${PNG_LIB_NAME_STATIC} ${ZLIB_LIBRARY} ${M_LIBRARY})
endif()
if(PNG_FRAMEWORK)
set(PNG_LIB_NAME_FRAMEWORK ${PNG_LIB_NAME}_framework)
add_library(${PNG_LIB_NAME_FRAMEWORK} SHARED ${libpng_sources})
list(APPEND PNG_LIB_TARGETS ${PNG_LIB_NAME_FRAMEWORK})
set_target_properties(${PNG_LIB_NAME_FRAMEWORK} PROPERTIES
FRAMEWORK TRUE
FRAMEWORK_VERSION ${PNGLIB_VERSION}
MACOSX_FRAMEWORK_SHORT_VERSION_STRING ${PNGLIB_MAJOR}.${PNGLIB_MINOR}
MACOSX_FRAMEWORK_BUNDLE_VERSION ${PNGLIB_VERSION}
MACOSX_FRAMEWORK_IDENTIFIER org.libpng.libpng
XCODE_ATTRIBUTE_INSTALL_PATH "@rpath"
PUBLIC_HEADER "${libpng_public_hdrs}"
OUTPUT_NAME png)
target_link_libraries(${PNG_LIB_NAME_FRAMEWORK} ${ZLIB_LIBRARY} ${M_LIBRARY})
endif()
if(NOT PNG_LIB_TARGETS)
message(SEND_ERROR
"No library variant selected to build. "
"Please enable at least one of the following options: PNG_STATIC, PNG_SHARED")
"Please enable at least one of the following options: "
" PNG_STATIC, PNG_SHARED, PNG_FRAMEWORK")
endif()
if(PNG_SHARED AND WIN32)
......@@ -220,6 +228,7 @@ macro(CREATE_SYMLINK SRC_FILE DEST_FILE)
ADD_CUSTOM_TARGET(${DEST_FILE}_COPY ALL DEPENDS ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE})
else(WIN32 AND NOT CYGWIN AND NOT MSYS)
get_filename_component(LINK_TARGET "${SRC_FILE}" NAME)
execute_process(COMMAND ${CMAKE_COMMAND} -E make_directory ${CMAKE_CURRENT_BINARY_DIR}/${CMAKE_LIBRARY_OUTPUT_DIRECTORY})
execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${LINK_TARGET}" ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
execute_process(COMMAND ${CMAKE_COMMAND} -E create_symlink "${LINK_TARGET}" ${DEST_FILE} WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR})
endif(WIN32 AND NOT CYGWIN AND NOT MSYS)
......@@ -252,7 +261,7 @@ endif(NOT WIN32 OR CYGWIN OR MINGW)
# SET UP LINKS
if(PNG_SHARED)
set_target_properties(${PNG_LIB_NAME} PROPERTIES
# VERSION 16.${PNGLIB_RELEASE}.1.6.10
# VERSION 16.${PNGLIB_RELEASE}.1.6.21
VERSION 16.${PNGLIB_RELEASE}.0
SOVERSION 16
CLEAN_DIRECT_OUTPUT 1)
......@@ -283,7 +292,8 @@ if(NOT SKIP_INSTALL_LIBRARIES AND NOT SKIP_INSTALL_ALL )
${PNG_EXPORT_RULE}
RUNTIME DESTINATION bin
LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
FRAMEWORK DESTINATION ${CMAKE_INSTALL_LIBDIR})
if(PNG_SHARED)
# Create a symlink for libpng.dll.a => libpng16.dll.a on Cygwin
......@@ -350,7 +360,7 @@ if(PNG_EXPORT_RULE AND NOT SKIP_INSTALL_EXPORT AND NOT SKIP_INSTALL_ALL )
install(EXPORT libpng DESTINATION lib/libpng FILE lib${PNG_LIB_NAME}.cmake)
endif()
# what's with libpng-$VER%.txt and all the extra files?
# what's with libpng-manual.txt and all the extra files?
# UNINSTALL
# do we need this?
......
source/Irrlicht/libpng/INSTALL
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source/Irrlicht/libpng/LICENSE
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......@@ -10,21 +10,18 @@ this sentence.
This code is released under the libpng license.
libpng versions 1.2.6, August 15, 2004, through 1.6.10, March 6, 2014, are
Copyright (c) 2004, 2006-2014 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
distributed according to the same disclaimer and license as libpng-1.0.6
with the following individuals added to the list of Contributing Authors
libpng versions 1.0.7, July 1, 2000, through 1.6.21, January 15, 2016, are
Copyright (c) 2000-2002, 2004, 2006-2016 Glenn Randers-Pehrson, are
derived from libpng-1.0.6, 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:
Simon-Pierre Cadieux
Eric S. Raymond
Mans Rullgard
Cosmin Truta
Gilles Vollant
James Yu
and with the following additions to the disclaimer:
......@@ -36,18 +33,20 @@ 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, are derived from
libpng-0.96, 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,
with the following individuals added to the list of Contributing Authors:
Copyright (c) 1996-1997 Andreas Dilger, are derived from libpng-0.88,
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
Kevin Bracey
......@@ -57,7 +56,7 @@ 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:
......@@ -80,12 +79,12 @@ 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
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
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
......@@ -94,18 +93,20 @@ 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.
END OF COPYRIGHT NOTICE, DISCLAIMER, and LICENSE.
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
March 6, 2014
January 15, 2016
source/Irrlicht/libpng/README
View file @ 818d5930
README for libpng version 1.6.10 - March 6, 2014 (shared library 16.0)
README for libpng version 1.6.21 - January 15, 2016 (shared library 16.0)
See the note about version numbers near the top of png.h
See INSTALL for instructions on how to install libpng.
......@@ -23,18 +23,25 @@ earlier versions if you are using a shared library. The type of the
png_uint_32, which will affect shared-library applications that use
this function.
To avoid problems with changes to the internals of png_info_struct,
To avoid problems with changes to the internals of png info_struct,
new APIs have been made available in 0.95 to avoid direct application
access to info_ptr. These functions are the png_set_<chunk> and
png_get_<chunk> functions. These functions should be used when
accessing/storing the info_struct data, rather than manipulating it
directly, to avoid such problems in the future.
It is important to note that the APIs do not make current programs
It is important to note that the APIs did not make current programs
that access the info struct directly incompatible with the new
library. However, it is strongly suggested that new programs use
the new APIs (as shown in example.c and pngtest.c), and older programs
be converted to the new format, to facilitate upgrades in the future.
library, through libpng-1.2.x. In libpng-1.4.x, which was meant to
be a transitional release, members of the png_struct and the
info_struct can still be accessed, but the compiler will issue a
warning about deprecated usage. Since libpng-1.5.0, direct access
to these structs is not allowed, and the definitions of the structs
reside in private pngstruct.h and pnginfo.h header files that are not
accessible to applications. It is strongly suggested that new
programs use the new APIs (as shown in example.c and pngtest.c), and
older programs be converted to the new format, to facilitate upgrades
in the future.
****
Additions since 0.90 include the ability to compile libpng as a
......@@ -87,6 +94,12 @@ This code is currently being archived at libpng.sf.net in the
[DOWNLOAD] area, and at ftp://ftp.simplesystems.org. If you can't find it
in any of those places, e-mail me, and I'll help you find it.
I am not a lawyer, but I believe that the Export Control Classification
Number (ECCN) for libpng is EAR99, which means not subject to export
controls or International Traffic in Arms Regulations (ITAR) because it
is open source, publicly available software, that does not contain any
encryption software. See the EAR, paragraphs 734.3(b)(3) and 734.7(b).
If you have any code changes, requests, problems, etc., please e-mail
them to me. Also, I'd appreciate any make files or project files,
and any modifications you needed to make to get libpng to compile,
......@@ -121,7 +134,7 @@ and ...". If in doubt, send questions to me. I'll bounce them
to others, if necessary.
Please do not send suggestions on how to change PNG. We have
been discussing PNG for nineteen years now, and it is official and
been discussing PNG for twenty years now, and it is official and
finished. If you have suggestions for libpng, however, I'll
gladly listen. Even if your suggestion is not used immediately,
it may be used later.
......
source/Irrlicht/libpng/TODO
View file @ 818d5930
......@@ -6,6 +6,7 @@ Better C++ wrapper/full C++ implementation?
Fix problem with C++ and EXTERN "C".
cHRM transformation.
Remove setjmp/longjmp usage in favor of returning error codes.
Palette creation.
Add "grayscale->palette" transformation and "palette->grayscale" detection.
Improved dithering.
Multi-lingual error and warning message support.
......
source/Irrlicht/libpng/configure
View file @ 818d5930
echo "
There is no \"configure\" script in this distribution (*.zip or *.7z) of
libpng-1.6.10.
libpng-1.6.21.
Instead, please copy the appropriate makefile for your system from the
\"scripts\" directory. Read the INSTALL file for more details.
Update, July 2004: you can get a \"configure\" based distribution
from the libpng distribution sites. Download the file
libpng-1.6.10.tar.gz, libpng-1.6.10.tar.xz, or libpng-1.6.10.tar.bz2
libpng-1.6.21.tar.gz or libpng-1.6.21.tar.xz.
If the line endings in the files look funny, which is likely to be the
case if you were trying to run \"configure\" on a Linux machine, you may
......
source/Irrlicht/libpng/contrib/README.txt deleted 100644 → 0
View file @ 82b5708f
This "contrib" directory contains contributions which are not necessarily under
the libpng license, although all are open source. They are not part of
libpng proper and are not used for building the library.
source/Irrlicht/libpng/contrib/arm-neon/README deleted 100644 → 0
View file @ 82b5708f
OPERATING SYSTEM SPECIFIC ARM NEON DETECTION
--------------------------------------------
Detection of the ability to exexcute ARM NEON on an ARM processor requires
operating system support. (The information is not available in user mode.)
HOW TO USE THIS
---------------
This directory contains C code fragments that can be included in arm/arm_init.c
by setting the macro PNG_ARM_NEON_FILE to the file name in "" or <> at build
time. This setting is not recorded in pnglibconf.h and can be changed simply by
rebuilding arm/arm_init.o with the required macro definition.
For any of this code to be used the ARM NEON code must be enabled and run time
checks must be supported. I.e.:
#if PNG_ARM_NEON_OPT > 0
#ifdef PNG_ARM_NEON_CHECK_SUPPORTED
This is done in a 'configure' build by passing configure the argument:
--enable-arm-neon=check
Apart from the basic Linux implementation in contrib/arm-neon/linux.c this code
is unsupported. That means that it is not even compiled on a regular basis and
may be broken in any given minor release.
FILE FORMAT
-----------
Each file documents its testing status as of the last time it was tested (which
may have been a long time ago):
STATUS: one of:
SUPPORTED: This indicates that the file is included in the regularly
performed test builds and bugs are fixed when discovered.
COMPILED: This indicates that the code did compile at least once. See the
more detailed description for the extent to which the result was
successful.
TESTED: This means the code was fully compiled into the libpng test programs
and these were run at least once.
BUG REPORTS: an email address to which to send reports of problems
The file is a fragment of C code. It should not define any 'extern' symbols;
everything should be static. It must define the function:
static int png_have_neon(png_structp png_ptr);
That function must return 1 if ARM NEON instructions are supported, 0 if not.
It must not execute png_error unless it detects a bug. A png_error will prevent
the reading of the PNG and in the future, writing too.
BUG REPORTS
-----------
If you mail a bug report for any file that is not SUPPORTED there may only be
limited response. Consider fixing it and sending a patch to fix the problem -
this is more likely to result in action.
CONTRIBUTIONS
-------------
You may send contributions of new implementations to
png-mng-implement@sourceforge.net. Please write code in strict C90 C where
possible. Obviously OS dependencies are to be expected. If you submit code you
must have the authors permission and it must have a license that is acceptable
to the current maintainer; in particular that license must permit modification
and redistribution.
Please try to make the contribution a single file and give the file a clear and
unambiguous name that identifies the target OS. If multiple files really are
required put them all in a sub-directory.
You must also be prepared to handle bug reports from users of the code, either
by joining the png-mng-implement mailing list or by providing an email for the
"BUG REPORTS" entry or both. Please make sure that the header of the file
contains the STATUS and BUG REPORTS fields as above.
Please list the OS requirements as precisely as possible. Ideally you should
also list the environment in which the code has been tested and certainly list
any environments where you suspect it might not work.
source/Irrlicht/libpng/contrib/arm-neon/android-ndk.c deleted 100644 → 0
View file @ 82b5708f
/* contrib/arm-neon/android-ndk.c
*
* Copyright (c) 2014 Glenn Randers-Pehrson
* Written by John Bowler, 2014.
* Last changed in libpng 1.6.10 [March 6, 2014]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*
* SEE contrib/arm-neon/README before reporting bugs
*
* STATUS: COMPILED, UNTESTED
* BUG REPORTS: png-mng-implement@sourceforge.net
*
* png_have_neon implemented for the Android NDK, see:
*
* Documentation:
* http://www.kandroid.org/ndk/docs/CPU-ARM-NEON.html
* http://code.google.com/p/android/issues/detail?id=49065
*
* NOTE: this requires that libpng is built against the Android NDK and linked
* with an implementation of the Android ARM 'cpu-features' library. The code
* has been compiled only, not linked: no version of the library has been found,
* only the header files exist in the NDK.
*/
#include <cpu-features.h>
static int
png_have_neon(png_structp png_ptr)
{
/* This is a whole lot easier than the linux code, however it is probably
* implemented as below, therefore it is better to cache the result (these
* function calls may be slow!)
*/
PNG_UNUSED(png_ptr)
return android_getCpuFamily() == ANDROID_CPU_FAMILY_ARM &&
(android_getCpuFeatures() & ANDROID_CPU_ARM_FEATURE_NEON) != 0;
}
source/Irrlicht/libpng/contrib/arm-neon/linux-auxv.c deleted 100644 → 0
View file @ 82b5708f
/* contrib/arm-neon/linux-auxv.c
*
* Copyright (c) 2014 Glenn Randers-Pehrson
* Written by Mans Rullgard, 2011.
* Last changed in libpng 1.6.10 [March 6, 2014]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*
* SEE contrib/arm-neon/README before reporting bugs
*
* STATUS: COMPILED, TESTED
* BUG REPORTS: png-mng-implement@sourceforge.net
*
* png_have_neon implemented for Linux versions which allow access to
* /proc/self/auxv. This is probably faster, cleaner and safer than the code to
* read /proc/cpuinfo in contrib/arm-neon/linux, however it is yet another piece
* of potentially untested code and has more complex dependencies than the code
* to read cpuinfo.
*
* This generic __linux__ implementation requires reading /proc/self/auxv and
* looking at each element for one that records NEON capabilities.
*/
#include <unistd.h> /* for POSIX 1003.1 */
#include <errno.h> /* for EINTR */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <elf.h>
#include <asm/hwcap.h>
/* A read call may be interrupted, in which case it returns -1 and sets errno to
* EINTR if nothing was done, otherwise (if something was done) a partial read
* may result.
*/
static size_t
safe_read(png_structp png_ptr, int fd, void *buffer_in, size_t nbytes)
{
size_t ntotal = 0;
char *buffer = png_voidcast(char*, buffer_in);
while (nbytes > 0)
{
unsigned int nread;
int iread;
/* Passing nread > INT_MAX to read is implementation defined in POSIX
* 1003.1, therefore despite the unsigned argument portable code must
* limit the value to INT_MAX!
*/
if (nbytes > INT_MAX)
nread = INT_MAX;
else
nread = (unsigned int)/*SAFE*/nbytes;
iread = read(fd, buffer, nread);
if (iread == -1)
{
/* This is the devil in the details, a read can terminate early with 0
* bytes read because of EINTR, yet it still returns -1 otherwise end
* of file cannot be distinguished.
*/
if (errno != EINTR)
{
png_warning(png_ptr, "/proc read failed");
return 0; /* I.e., a permanent failure */
}
}
else if (iread < 0)
{
/* Not a valid 'read' result: */
png_warning(png_ptr, "OS /proc read bug");
return 0;
}
else if (iread > 0)
{
/* Continue reading until a permanent failure, or EOF */
buffer += iread;
nbytes -= (unsigned int)/*SAFE*/iread;
ntotal += (unsigned int)/*SAFE*/iread;
}
else
return ntotal;
}
return ntotal; /* nbytes == 0 */
}
static int
png_have_neon(png_structp png_ptr)
{
int fd = open("/proc/self/auxv", O_RDONLY);
Elf32_auxv_t aux;
/* Failsafe: failure to open means no NEON */
if (fd == -1)
{
png_warning(png_ptr, "/proc/self/auxv open failed");
return 0;
}
while (safe_read(png_ptr, fd, &aux, sizeof aux) == sizeof aux)
{
if (aux.a_type == AT_HWCAP && (aux.a_un.a_val & HWCAP_NEON) != 0)
{
close(fd);
return 1;
}
}
close(fd);
return 0;
}
source/Irrlicht/libpng/contrib/arm-neon/linux.c deleted 100644 → 0
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/* contrib/arm-neon/linux.c
*
* Copyright (c) 2014 Glenn Randers-Pehrson
* Written by John Bowler, 2014.
* Last changed in libpng 1.6.10 [March 6, 2014]
*
* This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer
* and license in png.h
*
* SEE contrib/arm-neon/README before reporting bugs
*
* STATUS: SUPPORTED
* BUG REPORTS: png-mng-implement@sourceforge.net
*
* png_have_neon implemented for Linux by reading the widely available
* pseudo-file /proc/cpuinfo.
*
* This code is strict ANSI-C and is probably moderately portable, it does
* however use <stdio.h> and assumes that /proc/cpuinfo is never localized.
*/
#include <stdio.h>
static int
png_have_neon(png_structp png_ptr)
{
FILE *f = fopen("/proc/cpuinfo", "rb");
if (f != NULL)
{
/* This is a simple state machine which reads the input byte-by-byte until
* it gets a match on the 'neon' feature or reaches the end of the stream.
*/
static const char ch_feature[] = { 70, 69, 65, 84, 85, 82, 69, 83 };
static const char ch_neon[] = { 78, 69, 79, 78 };
enum
{
StartLine, Feature, Colon, StartTag, Neon, HaveNeon, SkipTag, SkipLine
} state;
int counter;
for (state=StartLine, counter=0;;)
{
int ch = fgetc(f);
if (ch == EOF)
{
/* EOF means error or end-of-file, return false; neon at EOF is
* assumed to be a mistake.
*/
fclose(f);
return 0;
}
switch (state)
{
case StartLine:
/* Match spaces at the start of line */
if (ch <= 32) /* skip control characters and space */
break;
counter=0;
state = Feature;
/* FALL THROUGH */
case Feature:
/* Match 'FEATURE', ASCII case insensitive. */
if ((ch & ~0x20) == ch_feature[counter])
{
if (++counter == (sizeof ch_feature))
state = Colon;
break;
}
/* did not match 'feature' */
state = SkipLine;
/* FALL THROUGH */
case SkipLine:
skipLine:
/* Skip everything until we see linefeed or carriage return */
if (ch != 10 && ch != 13)
break;
state = StartLine;
break;
case Colon:
/* Match any number of space or tab followed by ':' */
if (ch == 32 || ch == 9)
break;
if (ch == 58) /* i.e. ':' */
{
state = StartTag;
break;
}
/* Either a bad line format or a 'feature' prefix followed by
* other characters.
*/
state = SkipLine;
goto skipLine;
case StartTag:
/* Skip space characters before a tag */
if (ch == 32 || ch == 9)
break;
state = Neon;
counter = 0;
/* FALL THROUGH */
case Neon:
/* Look for 'neon' tag */
if ((ch & ~0x20) == ch_neon[counter])
{
if (++counter == (sizeof ch_neon))
state = HaveNeon;
break;
}
state = SkipTag;
/* FALL THROUGH */
case SkipTag:
/* Skip non-space characters */
if (ch == 10 || ch == 13)
state = StartLine;
else if (ch == 32 || ch == 9)
state = StartTag;
break;
case HaveNeon:
/* Have seen a 'neon' prefix, but there must be a space or new
* line character to terminate it.
*/
if (ch == 10 || ch == 13 || ch == 32 || ch == 9)
{
fclose(f);
return 1;
}
state = SkipTag;
break;
default:
png_error(png_ptr, "png_have_neon: internal error (bug)");
}
}
}
else
png_warning(png_ptr, "/proc/cpuinfo open failed");
return 0;
}
source/Irrlicht/libpng/contrib/examples/README.txt deleted 100644 → 0
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This directory (contrib/examples) contains examples of libpng usage.
NO COPYRIGHT RIGHTS ARE CLAIMED TO ANY OF THE FILES IN THIS DIRECTORY.
To the extent possible under law, the authors have waived all copyright and
related or neighboring rights to this work. This work is published from:
United States.
The files may be used freely in any way. The intention is that appropriate
parts of the files be used in other libpng-using programs without any need for
the authors of the using code to seek copyright or license from the original
authors.
The source code and comments in this directory are the original work of the
people named below. No other person or organization has made contributions to
the work in this directory.
ORIGINAL AUTHORS
The following people have contributed to the code in this directory. None
of the people below claim any rights with regard to the contents of this
directory.
John Bowler <jbowler@acm.org>
source/Irrlicht/libpng/contrib/examples/iccfrompng.c deleted 100644 → 0
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/*- iccfrompng
*
* COPYRIGHT: Written by John Cunningham Bowler, 2011.
* To the extent possible under law, the author has waived all copyright and
* related or neighboring rights to this work. This work is published from:
* United States.
*
* Extract any icc profiles found in the given PNG files. This is a simple
* example of a program that extracts information from the header of a PNG file
* without processing the image. Notice that some header information may occur
* after the image data. Textual data and comments are an example; the approach
* in this file won't work reliably for such data because it only looks for the
* information in the section of the file that preceeds the image data.
*
* Compile and link against libpng and zlib, plus anything else required on the
* system you use.
*
* To use supply a list of PNG files containing iCCP chunks, the chunks will be
* extracted to a similarly named file with the extension replaced by 'icc',
* which will be overwritten without warning.
*/
#include <stdlib.h>
#include <setjmp.h>
#include <string.h>
#include <stdio.h>
#include <png.h>
static int verbose = 1;
static png_byte no_profile[] = "no profile";
static png_bytep
extract(FILE *fp, png_uint_32 *proflen)
{
png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0);
png_infop info_ptr = NULL;
png_bytep result = NULL;
/* Initialize for error or no profile: */
*proflen = 0;
if (png_ptr == NULL)
{
fprintf(stderr, "iccfrompng: version library mismatch?\n");
return 0;
}
if (setjmp(png_jmpbuf(png_ptr)))
{
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return 0;
}
png_init_io(png_ptr, fp);
info_ptr = png_create_info_struct(png_ptr);
if (info_ptr == NULL)
png_error(png_ptr, "OOM allocating info structure");
png_read_info(png_ptr, info_ptr);
{
png_charp name;
int compression_type;
png_bytep profile;
if (png_get_iCCP(png_ptr, info_ptr, &name, &compression_type, &profile,
proflen) & PNG_INFO_iCCP)
{
result = malloc(*proflen);
if (result != NULL)
memcpy(result, profile, *proflen);
else
png_error(png_ptr, "OOM allocating profile buffer");
}
else
result = no_profile;
}
png_destroy_read_struct(&png_ptr, &info_ptr, NULL);
return result;
}
static int
extract_one_file(const char *filename)
{
int result = 0;
FILE *fp = fopen(filename, "rb");
if (fp != NULL)
{
png_uint_32 proflen = 0;
png_bytep profile = extract(fp, &proflen);
if (profile != NULL && profile != no_profile)
{
size_t len;
char *output;
{
const char *ep = strrchr(filename, '.');
if (ep != NULL)
len = ep-filename;
else
len = strlen(filename);
}
output = malloc(len + 5);
if (output != NULL)
{
FILE *of;
memcpy(output, filename, len);
strcpy(output+len, ".icc");
of = fopen(output, "wb");
if (of != NULL)
{
if (fwrite(profile, proflen, 1, of) == 1 &&
fflush(of) == 0 &&
fclose(of) == 0)
{
if (verbose)
printf("%s -> %s\n", filename, output);
/* Success return */
result = 1;
}
else
{
fprintf(stderr, "%s: error writing profile\n", output);
if (remove(output))
fprintf(stderr, "%s: could not remove file\n", output);
}
}
else
fprintf(stderr, "%s: failed to open output file\n", output);
free(output);
}
else
fprintf(stderr, "%s: OOM allocating string!\n", filename);
free(profile);
}
else if (verbose && profile == no_profile)
printf("%s has no profile\n", filename);
}
else
fprintf(stderr, "%s: could not open file\n", filename);
return result;
}
int
main(int argc, char **argv)
{
int i;
int extracted = 0;
for (i=1; i<argc; ++i)
{
if (strcmp(argv[i], "-q") == 0)
verbose = 0;
else if (extract_one_file(argv[i]))
extracted = 1;
}
/* Exit code is true if any extract succeeds */
return extracted == 0;
}
source/Irrlicht/libpng/contrib/examples/pngpixel.c deleted 100644 → 0
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source/Irrlicht/libpng/contrib/examples/pngtopng.c deleted 100644 → 0
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/*- pngtopng
*
* COPYRIGHT: Written by John Cunningham Bowler, 2011.
* To the extent possible under law, the author has waived all copyright and
* related or neighboring rights to this work. This work is published from:
* United States.
*
* Read a PNG and write it out in a fixed format, using the 'simplified API'
* that was introduced in libpng-1.6.0.
*
* This sample code is just the code from the top of 'example.c' with some error
* handling added. See example.c for more comments.
*/
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
/* Normally use <png.h> here to get the installed libpng, but this is done to
* ensure the code picks up the local libpng implementation:
*/
#include "../../png.h"
int main(int argc, const char **argv)
{
int result = 1;
if (argc == 3)
{
png_image image;
/* Only the image structure version number needs to be set. */
memset(&image, 0, sizeof image);
image.version = PNG_IMAGE_VERSION;
if (png_image_begin_read_from_file(&image, argv[1]))
{
png_bytep buffer;
/* Change this to try different formats! If you set a colormap format
* then you must also supply a colormap below.
*/
image.format = PNG_FORMAT_RGBA;
buffer = malloc(PNG_IMAGE_SIZE(image));
if (buffer != NULL)
{
if (png_image_finish_read(&image, NULL/*background*/, buffer,
0/*row_stride*/, NULL/*colormap for PNG_FORMAT_FLAG_COLORMAP */))
{
if (png_image_write_to_file(&image, argv[2],
0/*convert_to_8bit*/, buffer, 0/*row_stride*/,
NULL/*colormap*/))
result = 0;
else
fprintf(stderr, "pngtopng: write %s: %s\n", argv[2],
image.message);
free(buffer);
}
else
{
fprintf(stderr, "pngtopng: read %s: %s\n", argv[1],
image.message);
/* This is the only place where a 'free' is required; libpng does
* the cleanup on error and success, but in this case we couldn't
* complete the read because of running out of memory.
*/
png_image_free(&image);
}
}
else
fprintf(stderr, "pngtopng: out of memory: %lu bytes\n",
(unsigned long)PNG_IMAGE_SIZE(image));
}
else
/* Failed to read the first argument: */
fprintf(stderr, "pngtopng: %s: %s\n", argv[1], image.message);
}
else
/* Wrong number of arguments */
fprintf(stderr, "pngtopng: usage: pngtopng input-file output-file\n");
return result;
}
source/Irrlicht/libpng/contrib/gregbook/COPYING deleted 100644 → 0
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This diff is collapsed.
source/Irrlicht/libpng/contrib/gregbook/LICENSE deleted 100644 → 0
View file @ 82b5708f
---------------------------------------------------------------------------
Copyright (c) 1998-2008 Greg Roelofs. All rights reserved.
This software is provided "as is," without warranty of any kind,
express or implied. In no event shall the author or contributors
be held liable for any damages arising in any way from the use of
this software.
The contents of this file are DUAL-LICENSED. You may modify and/or
redistribute this software according to the terms of one of the
following two licenses (at your option):
LICENSE 1 ("BSD-like with advertising clause"):
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute
it freely, subject to the following restrictions:
1. Redistributions of source code must retain the above copyright
notice, disclaimer, and this list of conditions.
2. Redistributions in binary form must reproduce the above copyright
notice, disclaimer, and this list of conditions in the documenta-
tion and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this
software must display the following acknowledgment:
This product includes software developed by Greg Roelofs
and contributors for the book, "PNG: The Definitive Guide,"
published by O'Reilly and Associates.
LICENSE 2 (GNU GPL v2 or later):
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
---------------------------------------------------------------------------
source/Irrlicht/libpng/contrib/gregbook/Makefile.mingw32 deleted 100644 → 0
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# Sample makefile for rpng-win / rpng2-win / wpng using mingw32-gcc and make.
# Greg Roelofs
# Last modified: 2 June 2007
#
# The programs built by this makefile are described in the book,
# "PNG: The Definitive Guide," by Greg Roelofs (O'Reilly and
# Associates, 1999). Go buy a copy, eh? Well, OK, it's not
# generally for sale anymore, but it's the thought that counts,
# right? (Hint: http://www.libpng.org/pub/png/book/ )
#
# Invoke this makefile from a DOS-prompt window via:
#
# make -f Makefile.mingw32
#
# This makefile assumes libpng and zlib have already been built or downloaded
# and are in subdirectories at the same level as the current subdirectory
# (as indicated by the PNGDIR and ZDIR macros below). It makes no assumptions
# at all about the mingw32 installation tree (W32DIR). Edit as appropriate.
#
# Note that the names of the dynamic and static libpng and zlib libraries
# used below may change in later releases of the libraries. This makefile
# builds both statically and dynamically linked executables by default.
# (You need only one set, but for testing it can be handy to have both.)
# macros --------------------------------------------------------------------
#PNGDIR = ../..# for libpng-x.y.z/contrib/gregbook builds
PNGDIR = ../libpng-win32
PNGINC = -I$(PNGDIR)
PNGLIBd = $(PNGDIR)/libpng.dll.a # dynamically linked
PNGLIBs = $(PNGDIR)/libpng.a # statically linked, local libpng
#ZDIR = ../../../zlib-win32# for libpng-x.y.z/contrib/gregbook builds
ZDIR = ../zlib-win32
ZINC = -I$(ZDIR)
ZLIBd = $(ZDIR)/libzdll.a
ZLIBs = $(ZDIR)/libz.a
# change this to be the path where mingw32 installs its stuff:
W32DIR =
#W32DIR = /usr/local/cross-tools/i386-mingw32msvc
W32INC = -I$(W32DIR)/include
W32LIB = $(W32DIR)/lib/libuser32.a $(W32DIR)/lib/libgdi32.a
CC = gcc
#CC = i386-mingw32msvc-gcc # e.g., Linux -> Win32 cross-compilation
LD = $(CC)
RM = rm -f
CPPFLAGS = $(INCS)
CFLAGS = -O -Wall $(MINGW_CCFLAGS)
# [note that -Wall is a gcc-specific compilation flag ("most warnings on")]
# [-ansi, -pedantic and -W can also be used]
LDFLAGS = $(MINGW_LDFLAGS)
O = .o
E = .exe
INCS = $(PNGINC) $(ZINC) $(W32INC)
RLIBSd = $(PNGLIBd) $(ZLIBd) $(W32LIB) -lm
RLIBSs = $(PNGLIBs) $(ZLIBs) $(W32LIB) -lm
WLIBSd = $(PNGLIBd) $(ZLIBd)
WLIBSs = $(PNGLIBs) $(ZLIBs)
RPNG = rpng-win
RPNG2 = rpng2-win
WPNG = wpng
ROBJSd = $(RPNG)$(O) readpng.pic$(O)
ROBJS2d = $(RPNG2)$(O) readpng2.pic$(O)
WOBJSd = $(WPNG)$(O) writepng.pic$(O)
RPNGs = $(RPNG)-static
RPNG2s = $(RPNG2)-static
WPNGs = $(WPNG)-static
ROBJSs = $(RPNG)$(O) readpng$(O)
ROBJS2s = $(RPNG2)$(O) readpng2$(O)
WOBJSs = $(WPNG)$(O) writepng$(O)
STATIC_EXES = $(RPNGs)$(E) $(RPNG2s)$(E) $(WPNGs)$(E)
DYNAMIC_EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
EXES = $(STATIC_EXES) $(DYNAMIC_EXES)
# implicit make rules -------------------------------------------------------
.c$(O):
$(CC) -c $(CPPFLAGS) $(CFLAGS) $<
%.pic$(O): %.c
$(CC) -c $(CPPFLAGS) $(CFLAGS) -DPNG_BUILD_DLL -o $@ $<
# dependencies --------------------------------------------------------------
all: $(EXES)
$(RPNGs)$(E): $(ROBJSs)
$(LD) $(LDFLAGS) -o $@ $(ROBJSs) $(RLIBSs)
$(RPNG)$(E): $(ROBJSd)
$(LD) $(LDFLAGS) -o $@ $(ROBJSd) $(RLIBSd)
$(RPNG2s)$(E): $(ROBJS2s)
$(LD) $(LDFLAGS) -o $@ $(ROBJS2s) $(RLIBSs)
$(RPNG2)$(E): $(ROBJS2d)
$(LD) $(LDFLAGS) -o $@ $(ROBJS2d) $(RLIBSd)
$(WPNGs)$(E): $(WOBJSs)
$(LD) $(LDFLAGS) -o $@ $(WOBJSs) $(WLIBSs)
$(WPNG)$(E): $(WOBJSd)
$(LD) $(LDFLAGS) -o $@ $(WOBJSd) $(WLIBSd)
$(RPNG)$(O): $(RPNG).c readpng.h
$(RPNG2)$(O): $(RPNG2).c readpng2.h
$(WPNG)$(O): $(WPNG).c writepng.h
readpng$(O) readpng.pic$(O): readpng.c readpng.h
readpng2$(O) readpng2.pic$(O): readpng2.c readpng2.h
writepng$(O) writepng.pic$(O): writepng.c writepng.h
# maintenance ---------------------------------------------------------------
clean:
$(RM) $(EXES)
$(RM) $(ROBJSs) $(ROBJS2s) $(WOBJSs)
$(RM) $(ROBJSd) $(ROBJS2d) $(WOBJSd)
source/Irrlicht/libpng/contrib/gregbook/Makefile.sgi deleted 100644 → 0
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# Sample makefile for rpng-x / rpng2-x / wpng for SGI using cc and make.
# Greg Roelofs
# Last modified: 7 March 2002
#
# The programs built by this makefile are described in the book,
# "PNG: The Definitive Guide," by Greg Roelofs (O'Reilly and
# Associates, 1999). Go buy a copy, eh? Buy some for friends
# and family, too. (Not that this is a blatant plug or anything.)
#
# Invoke this makefile from a shell prompt in the usual way; for example:
#
# make -f Makefile.sgi
#
# This makefile assumes libpng and zlib have already been built or downloaded
# and are both installed in /usr/local/{include,lib} (as indicated by the
# PNG* and Z* macros below). Edit as appropriate--choose only ONE each of
# the PNGINC, PNGLIB, ZINC and ZLIB lines.
#
# This makefile builds dynamically linked executables (against libpng and zlib,
# that is), but that can be changed by uncommenting the appropriate PNGLIB and
# ZLIB lines.
# macros --------------------------------------------------------------------
PNGINC = -I/usr/local/include/libpng16
PNGLIB = -L/usr/local/lib -lpng16 # dynamically linked against libpng
#PNGLIB = /usr/local/lib/libpng16.a # statically linked against libpng
# or:
#PNGINC = -I../..
#PNGLIB = -L../.. -lpng
#PNGLIB = ../../libpng.a
ZINC = -I/usr/local/include
ZLIB = -L/usr/local/lib -lz # dynamically linked against zlib
#ZLIB = /usr/local/lib/libz.a # statically linked against zlib
#ZINC = -I../zlib
#ZLIB = -L../zlib -lz
#ZLIB = ../../../zlib/libz.a
XINC = -I/usr/include/X11 # old-style, stock X distributions
XLIB = -L/usr/lib/X11 -lX11
#XINC = -I/usr/openwin/include # Sun workstations (OpenWindows)
#XLIB = -L/usr/openwin/lib -lX11
#XINC = -I/usr/X11R6/include # new X distributions (XFree86, etc.)
#XLIB = -L/usr/X11R6/lib -lX11
INCS = $(PNGINC) $(ZINC) $(XINC)
RLIBS = $(PNGLIB) $(ZLIB) $(XLIB) -lm
WLIBS = $(PNGLIB) $(ZLIB)
CC = cc
LD = cc
RM = rm -f
# ABI must be the same as that used to build libpng.
ABI =
CPPFLAGS =
CFLAGS = $(ABI) -O -fullwarn $(INCS)
LDFLAGS = $(ABI)
O = .o
E =
RPNG = rpng-x
RPNG2 = rpng2-x
WPNG = wpng
ROBJS = $(RPNG)$(O) readpng$(O)
ROBJS2 = $(RPNG2)$(O) readpng2$(O)
WOBJS = $(WPNG)$(O) writepng$(O)
EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
# implicit make rules -------------------------------------------------------
.c$(O):
$(CC) -c $(CPPFLAGS) $(CFLAGS) $<
# dependencies --------------------------------------------------------------
all: $(EXES)
$(RPNG)$(E): $(ROBJS)
$(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBS)
$(RPNG2)$(E): $(ROBJS2)
$(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBS)
$(WPNG)$(E): $(WOBJS)
$(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBS)
$(RPNG)$(O): $(RPNG).c readpng.h
$(RPNG2)$(O): $(RPNG2).c readpng2.h
$(WPNG)$(O): $(WPNG).c writepng.h
readpng$(O): readpng.c readpng.h
readpng2$(O): readpng2.c readpng2.h
writepng$(O): writepng.c writepng.h
# maintenance ---------------------------------------------------------------
clean:
$(RM) $(EXES) $(ROBJS) $(ROBJS2) $(WOBJS)
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# Sample makefile for rpng-x / rpng2-x / wpng using gcc and make.
# Greg Roelofs
# Last modified: 2 June 2007
#
# The programs built by this makefile are described in the book,
# "PNG: The Definitive Guide," by Greg Roelofs (O'Reilly and
# Associates, 1999). Go buy a copy, eh? Well, OK, it's not
# generally for sale anymore, but it's the thought that counts,
# right? (Hint: http://www.libpng.org/pub/png/book/ )
#
# Invoke this makefile from a shell prompt in the usual way; for example:
#
# make -f Makefile.unx
#
# This makefile assumes libpng and zlib have already been built or downloaded
# and are installed in /usr/local/{include,lib} or as otherwise indicated by
# the PNG* and Z* macros below. Edit as appropriate--choose only ONE each of
# the PNGINC, PNGLIBd, PNGLIBs, ZINC, ZLIBd and ZLIBs lines.
#
# This makefile builds both dynamically and statically linked executables
# (against libpng and zlib, that is), but that can be changed by modifying
# the "EXES =" line. (You need only one set, but for testing it can be handy
# to have both.)
# macros --------------------------------------------------------------------
#PNGDIR = /usr/local/lib
#PNGINC = -I/usr/local/include/libpng16
#PNGLIBd = -L$(PNGDIR) -lpng16 # dynamically linked, installed libpng
#PNGLIBs = $(PNGDIR)/libpng16.a # statically linked, installed libpng
# or:
PNGDIR = ../..# this one is for libpng-x.y.z/contrib/gregbook builds
#PNGDIR = ../libpng
PNGINC = -I$(PNGDIR)
PNGLIBd = -Wl,-rpath,$(PNGDIR) -L$(PNGDIR) -lpng16 # dynamically linked
PNGLIBs = $(PNGDIR)/libpng.a # statically linked, local libpng
ZDIR = /usr/local/lib
#ZDIR = /usr/lib64
ZINC = -I/usr/local/include
ZLIBd = -L$(ZDIR) -lz # dynamically linked against zlib
ZLIBs = $(ZDIR)/libz.a # statically linked against zlib
# or:
#ZDIR = ../zlib
#ZINC = -I$(ZDIR)
#ZLIBd = -Wl,-rpath,$(ZDIR) -L$(ZDIR) -lz # -rpath allows in-place testing
#ZLIBs = $(ZDIR)/libz.a
#XINC = -I/usr/include # old-style, stock X distributions
#XLIB = -L/usr/lib/X11 -lX11 # (including SGI IRIX)
#XINC = -I/usr/openwin/include # Sun workstations (OpenWindows)
#XLIB = -L/usr/openwin/lib -lX11
XINC = -I/usr/X11R6/include # new X distributions (X.org, etc.)
XLIB = -L/usr/X11R6/lib -lX11
#XLIB = -L/usr/X11R6/lib64 -lX11 # e.g., Red Hat on AMD64
INCS = $(PNGINC) $(ZINC) $(XINC)
RLIBSd = $(PNGLIBd) $(ZLIBd) $(XLIB) -lm
RLIBSs = $(PNGLIBs) $(ZLIBs) $(XLIB) -lm
WLIBSd = $(PNGLIBd) $(ZLIBd) -lm
WLIBSs = $(PNGLIBs) $(ZLIBs)
CC = gcc
LD = gcc
RM = rm -f
CPPFLAGS = $(INCS) -DFEATURE_LOOP
CFLAGS = -O -Wall
# [note that -Wall is a gcc-specific compilation flag ("most warnings on")]
# [-ansi, -pedantic and -W can also be used]
LDFLAGS =
O = .o
E =
RPNG = rpng-x
RPNG2 = rpng2-x
WPNG = wpng
RPNGs = $(RPNG)-static
RPNG2s = $(RPNG2)-static
WPNGs = $(WPNG)-static
ROBJS = $(RPNG)$(O) readpng$(O)
ROBJS2 = $(RPNG2)$(O) readpng2$(O)
WOBJS = $(WPNG)$(O) writepng$(O)
STATIC_EXES = $(RPNGs)$(E) $(RPNG2s)$(E) $(WPNGs)$(E)
DYNAMIC_EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
EXES = $(STATIC_EXES) $(DYNAMIC_EXES)
# implicit make rules -------------------------------------------------------
.c$(O):
$(CC) -c $(CPPFLAGS) $(CFLAGS) $<
# dependencies --------------------------------------------------------------
all: $(EXES)
$(RPNGs)$(E): $(ROBJS)
$(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBSs)
$(RPNG)$(E): $(ROBJS)
$(LD) $(LDFLAGS) -o $@ $(ROBJS) $(RLIBSd)
$(RPNG2s)$(E): $(ROBJS2)
$(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBSs)
$(RPNG2)$(E): $(ROBJS2)
$(LD) $(LDFLAGS) -o $@ $(ROBJS2) $(RLIBSd)
$(WPNGs)$(E): $(WOBJS)
$(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBSs)
$(WPNG)$(E): $(WOBJS)
$(LD) $(LDFLAGS) -o $@ $(WOBJS) $(WLIBSd)
$(RPNG)$(O): $(RPNG).c readpng.h
$(RPNG2)$(O): $(RPNG2).c readpng2.h
$(WPNG)$(O): $(WPNG).c writepng.h
readpng$(O): readpng.c readpng.h
readpng2$(O): readpng2.c readpng2.h
writepng$(O): writepng.c writepng.h
# maintenance ---------------------------------------------------------------
clean:
$(RM) $(EXES) $(ROBJS) $(ROBJS2) $(WOBJS)
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# Sample makefile for rpng-win / rpng2-win / wpng using MSVC and NMAKE.
# Greg Roelofs
# Last modified: 2 June 2007
#
# The programs built by this makefile are described in the book,
# "PNG: The Definitive Guide," by Greg Roelofs (O'Reilly and
# Associates, 1999). Go buy a copy, eh? Well, OK, it's not
# generally for sale anymore, but it's the thought that counts,
# right? (Hint: http://www.libpng.org/pub/png/book/ )
#
# Invoke this makefile from a DOS prompt window via:
#
# %devstudio%\vc\bin\vcvars32.bat
# nmake -nologo -f Makefile.w32
#
# where %devstudio% is the installation directory for MSVC / DevStudio. If
# you get "environment out of space" errors, create a desktop shortcut with
# "c:\windows\command.com /e:4096" as the program command line and set the
# working directory to this directory. Then double-click to open the new
# DOS-prompt window with a bigger environment and retry the commands above.
#
# This makefile assumes libpng and zlib have already been built or downloaded
# and are in subdirectories at the same level as the current subdirectory
# (as indicated by the PNGPATH and ZPATH macros below). Edit as appropriate.
#
# Note that the names of the dynamic and static libpng and zlib libraries
# used below may change in later releases of the libraries. This makefile
# builds statically linked executables, but that can be changed by uncom-
# menting the appropriate PNGLIB and ZLIB lines.
!include <ntwin32.mak>
# macros --------------------------------------------------------------------
PNGPATH = ../libpng
PNGINC = -I$(PNGPATH)
#PNGLIB = $(PNGPATH)/pngdll.lib
PNGLIB = $(PNGPATH)/libpng.lib
ZPATH = ../zlib
ZINC = -I$(ZPATH)
#ZLIB = $(ZPATH)/zlibdll.lib
ZLIB = $(ZPATH)/zlibstat.lib
WINLIBS = -defaultlib:user32.lib gdi32.lib
# ["real" apps may also need comctl32.lib, comdlg32.lib, winmm.lib, etc.]
INCS = $(PNGINC) $(ZINC)
RLIBS = $(PNGLIB) $(ZLIB) $(WINLIBS)
WLIBS = $(PNGLIB) $(ZLIB)
CC = cl
LD = link
RM = del
CPPFLAGS = $(INCS)
CFLAGS = -nologo -O -W3 $(cvars)
# [note that -W3 is an MSVC-specific compilation flag ("all warnings on")]
# [see %devstudio%\vc\include\win32.mak for cvars macro definition]
O = .obj
E = .exe
RLDFLAGS = -nologo -subsystem:windows
WLDFLAGS = -nologo
RPNG = rpng-win
RPNG2 = rpng2-win
WPNG = wpng
ROBJS = $(RPNG)$(O) readpng$(O)
ROBJS2 = $(RPNG2)$(O) readpng2$(O)
WOBJS = $(WPNG)$(O) writepng$(O)
EXES = $(RPNG)$(E) $(RPNG2)$(E) $(WPNG)$(E)
# implicit make rules -------------------------------------------------------
.c$(O):
$(CC) -c $(CPPFLAGS) $(CFLAGS) $<
# dependencies --------------------------------------------------------------
all: $(EXES)
$(RPNG)$(E): $(ROBJS)
$(LD) $(RLDFLAGS) -out:$@ $(ROBJS) $(RLIBS)
$(RPNG2)$(E): $(ROBJS2)
$(LD) $(RLDFLAGS) -out:$@ $(ROBJS2) $(RLIBS)
$(WPNG)$(E): $(WOBJS)
$(LD) $(WLDFLAGS) -out:$@ $(WOBJS) $(WLIBS)
$(RPNG)$(O): $(RPNG).c readpng.h
$(RPNG2)$(O): $(RPNG2).c readpng2.h
$(WPNG)$(O): $(WPNG).c writepng.h
readpng$(O): readpng.c readpng.h
readpng2$(O): readpng2.c readpng2.h
writepng$(O): writepng.c writepng.h
# maintenance ---------------------------------------------------------------
clean:
# ideally we could just do this:
# $(RM) $(EXES) $(ROBJS) $(ROBJS2) $(WOBJS)
# ...but the Windows "DEL" command is none too bright, so:
$(RM) r*$(E)
$(RM) w*$(E)
$(RM) r*$(O)
$(RM) w*$(O)
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===========================
PNG: The Definitive Guide
===========================
Source Code
Chapters 13, 14 and 15 of "PNG: The Definitive Guide" discuss three free,
cross-platform demo programs that show how to use the libpng reference
library: rpng, rpng2 and wpng. rpng and rpng2 are viewers; the first is
a very simple example that that shows how a standard file-viewer might use
libpng, while the second is designed to process streaming data and shows
how a web browser might be written. wpng is a simple command-line program
that reads binary PGM and PPM files (the ``raw'' grayscale and RGB subsets
of PBMPLUS/NetPBM) and converts them to PNG.
The source code for all three demo programs currently compiles under
Unix, OpenVMS, and 32-bit Windows. (Special thanks to Martin Zinser,
zinser@decus.de, for making the necessary changes for OpenVMS and for
providing an appropriate build script.) Build instructions can be found
below.
Files:
README this file
LICENSE terms of distribution and reuse (BSD-like or GNU GPL)
COPYING GNU General Public License (GPL)
Makefile.unx Unix makefile
Makefile.w32 Windows (MSVC) makefile
makevms.com OpenVMS build script
rpng-win.c Windows front end for the basic viewer
rpng-x.c X Window System (Unix, OpenVMS) front end
readpng.c generic back end for the basic viewer
readpng.h header file for the basic viewer
rpng2-win.c Windows front end for the progressive viewer
rpng2-x.c X front end for the progressive viewer
readpng2.c generic back end for the progressive viewer
readpng2.h header file for the progressive viewer
wpng.c generic (text) front end for the converter
writepng.c generic back end for the converter
writepng.h header file for the converter
toucan.png transparent PNG for testing (by Stefan Schneider)
Note that, although the programs are designed to be functional, their
primary purpose is to illustrate how to use libpng to add PNG support to
other programs. As such, their user interfaces are crude and definitely
are not intended for everyday use.
Please see http://www.libpng.org/pub/png/pngbook.html for further infor-
mation and links to the latest version of the source code, and Chapters
13-15 of the book for detailed discussion of the three programs.
Greg Roelofs
http://pobox.com/~newt/greg_contact.html
16 March 2008
BUILD INSTRUCTIONS
- Prerequisites (in order of compilation):
- zlib http://zlib.net/
- libpng http://www.libpng.org/pub/png/libpng.html
- pngbook http://www.libpng.org/pub/png/book/sources.html
The pngbook demo programs are explicitly designed to demonstrate proper
coding techniques for using the libpng reference library. As a result,
you need to download and build both zlib (on which libpng depends) and
libpng. A common build setup is to place the zlib, libpng and pngbook
subdirectory trees ("folders") in the same parent directory. Then the
libpng build can refer to files in ../zlib (or ..\zlib or [-.zlib]),
and similarly for the pngbook build.
Note that all three packages are designed to be built from a command
line by default; those who wish to use a graphical or other integrated
development environments are on their own.
- Unix:
Unpack the latest pngbook sources (which should correspond to this
README file) into a directory and change into that directory.
Copy Makefile.unx to Makefile and edit the PNG* and Z* variables
appropriately (possibly also the X* variables if necessary).
make
There is no "install" target, so copy the three executables somewhere
in your path or run them from the current directory. All three will
print a basic usage screen when run without any command-line arguments;
see the book for more details.
- Windows:
Unpack the latest pngbook sources (which should correspond to this
README file) into a folder, open a "DOS shell" or "command prompt"
or equivalent command-line window, and cd into the folder where you
unpacked the source code.
For MSVC, set up the necessary environment variables by invoking
%devstudio%\vc\bin\vcvars32.bat
where where %devstudio% is the installation directory for MSVC /
DevStudio. If you get "environment out of space" errors under 95/98,
create a desktop shortcut with "c:\windows\command.com /e:4096" as
the program command line and set the working directory to the pngbook
directory. Then double-click to open the new DOS-prompt window with
a bigger environment and retry the commands above.
Copy Makefile.w32 to Makefile and edit the PNGPATH and ZPATH variables
appropriately (possibly also the "INC" and "LIB" variables if needed).
Note that the names of the dynamic and static libpng and zlib libraries
used in the makefile may change in later releases of the libraries.
Also note that, as of libpng version 1.0.5, MSVC DLL builds do not work.
This makefile therefore builds statically linked executables, but if
the DLL problems ever get fixed, uncommenting the appropriate PNGLIB
and ZLIB lines will build dynamically linked executables instead.
Do the build by typing
nmake
The result should be three executables: rpng-win.exe, rpng2-win.exe,
and wpng.exe. Copy them somewhere in your PATH or run them from the
current folder. Like the Unix versions, the two windowed programs
(rpng and rpng2) now display a usage screen in a console window when
invoked without command-line arguments; this is new behavior as of
the June 2001 release. Note that the programs use the Unix-style "-"
character to specify options, instead of the more common DOS/Windows
"/" character. (For example: "rpng2-win -bgpat 4 foo.png", not
"rpng2-win /bgpat 4 foo.png")
- OpenVMS:
Unpack the pngbook sources into a subdirectory and change into that
subdirectory.
Edit makevms.com appropriately, specifically the zpath and pngpath
variables.
@makevms
To run the programs, they probably first need to be set up as "foreign
symbols," with "disk" and "dir" set appropriately:
$ rpng == "$disk:[dir]rpng-x.exe"
$ rpng2 == "$disk:[dir]rpng2-x.exe"
$ wpng == "$disk:[dir]wpng.exe"
All three will print a basic usage screen when run without any command-
line arguments; see the book for more details. Note that the options
style is Unix-like, i.e., preceded by "-" rather than "/".
RUNNING THE PROGRAMS: (VERY) BRIEF INTRO
rpng is a simple PNG viewer that can display transparent PNGs with a
specified background color; for example,
rpng -bgcolor \#ff0000 toucan.png
would display the image with a red background. rpng2 is a progressive
viewer that simulates a web browser in some respects; it can display
images against either a background color or a dynamically generated
background image. For example:
rpng2 -bgpat 16 toucan.png
wpng is a purely command-line image converter from binary PBMPLUS/NetPBM
format (.pgm or .ppm) to PNG; for example,
wpng -time < toucan-notrans.ppm > toucan-notrans.png
would convert the specified PPM file (using redirection) to PNG, auto-
matically setting the PNG modification-time chunk.
All options can be abbreviated to the shortest unique value; for example,
"-bgc" for -bgcolor (versus "-bgp" for -bgpat), or "-g" for -gamma.
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$!------------------------------------------------------------------------------
$! make "PNG: The Definitive Guide" demo programs (for X) under OpenVMS
$!
$! Script created by Martin Zinser for libpng; modified by Greg Roelofs
$! for standalone pngbook source distribution.
$!
$!
$! Set locations where zlib and libpng sources live.
$!
$ zpath = ""
$ pngpath = ""
$!
$ if f$search("[---.zlib]zlib.h").nes."" then zpath = "[---.zlib]"
$ if f$search("[--]png.h").nes."" then pngpath = "[--]"
$!
$ if f$search("[-.zlib]zlib.h").nes."" then zpath = "[-.zlib]"
$ if f$search("[-.libpng]png.h").nes."" then pngpath = "[-.libpng]"
$!
$ if zpath .eqs. ""
$ then
$ write sys$output "zlib include not found. Exiting..."
$ exit 2
$ endif
$!
$ if pngpath .eqs. ""
$ then
$ write sys$output "libpng include not found. Exiting..."
$ exit 2
$ endif
$!
$! Look for the compiler used.
$!
$ ccopt="/include=(''zpath',''pngpath')"
$ if f$getsyi("HW_MODEL").ge.1024
$ then
$ ccopt = "/prefix=all"+ccopt
$ comp = "__decc__=1"
$ if f$trnlnm("SYS").eqs."" then define sys sys$library:
$ else
$ if f$search("SYS$SYSTEM:DECC$COMPILER.EXE").eqs.""
$ then
$ if f$trnlnm("SYS").eqs."" then define sys sys$library:
$ if f$search("SYS$SYSTEM:VAXC.EXE").eqs.""
$ then
$ comp = "__gcc__=1"
$ CC :== GCC
$ else
$ comp = "__vaxc__=1"
$ endif
$ else
$ if f$trnlnm("SYS").eqs."" then define sys decc$library_include:
$ ccopt = "/decc/prefix=all"+ccopt
$ comp = "__decc__=1"
$ endif
$ endif
$ open/write lopt lib.opt
$ write lopt "''pngpath'libpng.olb/lib"
$ write lopt "''zpath'libz.olb/lib"
$ close lopt
$ open/write xopt x11.opt
$ write xopt "sys$library:decw$xlibshr.exe/share"
$ close xopt
$!
$! Build 'em.
$!
$ write sys$output "Compiling PNG book programs ..."
$ CALL MAKE readpng.OBJ "cc ''CCOPT' readpng" -
readpng.c readpng.h
$ CALL MAKE readpng2.OBJ "cc ''CCOPT' readpng2" -
readpng2.c readpng2.h
$ CALL MAKE writepng.OBJ "cc ''CCOPT' writepng" -
writepng.c writepng.h
$ write sys$output "Building rpng-x..."
$ CALL MAKE rpng-x.OBJ "cc ''CCOPT' rpng-x" -
rpng-x.c readpng.h
$ call make rpng-x.exe -
"LINK rpng-x,readpng,lib.opt/opt,x11.opt/opt" -
rpng-x.obj readpng.obj
$ write sys$output "Building rpng2-x..."
$ CALL MAKE rpng2-x.OBJ "cc ''CCOPT' rpng2-x" -
rpng2-x.c readpng2.h
$ call make rpng2-x.exe -
"LINK rpng2-x,readpng2,lib.opt/opt,x11.opt/opt" -
rpng2-x.obj readpng2.obj
$ write sys$output "Building wpng..."
$ CALL MAKE wpng.OBJ "cc ''CCOPT' wpng" -
wpng.c writepng.h
$ call make wpng.exe -
"LINK wpng,writepng,lib.opt/opt" -
wpng.obj writepng.obj
$ exit
$!
$!
$MAKE: SUBROUTINE !SUBROUTINE TO CHECK DEPENDENCIES
$ V = 'F$Verify(0)
$! P1 = What we are trying to make
$! P2 = Command to make it
$! P3 - P8 What it depends on
$
$ If F$Search(P1) .Eqs. "" Then Goto Makeit
$ Time = F$CvTime(F$File(P1,"RDT"))
$arg=3
$Loop:
$ Argument = P'arg
$ If Argument .Eqs. "" Then Goto Exit
$ El=0
$Loop2:
$ File = F$Element(El," ",Argument)
$ If File .Eqs. " " Then Goto Endl
$ AFile = ""
$Loop3:
$ OFile = AFile
$ AFile = F$Search(File)
$ If AFile .Eqs. "" .Or. AFile .Eqs. OFile Then Goto NextEl
$ If F$CvTime(F$File(AFile,"RDT")) .Ges. Time Then Goto Makeit
$ Goto Loop3
$NextEL:
$ El = El + 1
$ Goto Loop2
$EndL:
$ arg=arg+1
$ If arg .Le. 8 Then Goto Loop
$ Goto Exit
$
$Makeit:
$ VV=F$VERIFY(0)
$ write sys$output P2
$ 'P2
$ VV='F$Verify(VV)
$Exit:
$ If V Then Set Verify
$ENDSUBROUTINE
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/*---------------------------------------------------------------------------
rpng - simple PNG display program readpng.h
---------------------------------------------------------------------------
Copyright (c) 1998-2007 Greg Roelofs. All rights reserved.
This software is provided "as is," without warranty of any kind,
express or implied. In no event shall the author or contributors
be held liable for any damages arising in any way from the use of
this software.
The contents of this file are DUAL-LICENSED. You may modify and/or
redistribute this software according to the terms of one of the
following two licenses (at your option):
LICENSE 1 ("BSD-like with advertising clause"):
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute
it freely, subject to the following restrictions:
1. Redistributions of source code must retain the above copyright
notice, disclaimer, and this list of conditions.
2. Redistributions in binary form must reproduce the above copyright
notice, disclaimer, and this list of conditions in the documenta-
tion and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this
software must display the following acknowledgment:
This product includes software developed by Greg Roelofs
and contributors for the book, "PNG: The Definitive Guide,"
published by O'Reilly and Associates.
LICENSE 2 (GNU GPL v2 or later):
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
---------------------------------------------------------------------------*/
#ifndef TRUE
# define TRUE 1
# define FALSE 0
#endif
#ifndef MAX
# define MAX(a,b) ((a) > (b)? (a) : (b))
# define MIN(a,b) ((a) < (b)? (a) : (b))
#endif
#ifdef DEBUG
# define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);}
#else
# define Trace(x) ;
#endif
typedef unsigned char uch;
typedef unsigned short ush;
typedef unsigned long ulg;
/* prototypes for public functions in readpng.c */
void readpng_version_info(void);
int readpng_init(FILE *infile, ulg *pWidth, ulg *pHeight);
int readpng_get_bgcolor(uch *bg_red, uch *bg_green, uch *bg_blue);
uch *readpng_get_image(double display_exponent, int *pChannels,
ulg *pRowbytes);
void readpng_cleanup(int free_image_data);
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/*---------------------------------------------------------------------------
rpng2 - progressive-model PNG display program readpng2.h
---------------------------------------------------------------------------
Copyright (c) 1998-2008 Greg Roelofs. All rights reserved.
This software is provided "as is," without warranty of any kind,
express or implied. In no event shall the author or contributors
be held liable for any damages arising in any way from the use of
this software.
The contents of this file are DUAL-LICENSED. You may modify and/or
redistribute this software according to the terms of one of the
following two licenses (at your option):
LICENSE 1 ("BSD-like with advertising clause"):
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute
it freely, subject to the following restrictions:
1. Redistributions of source code must retain the above copyright
notice, disclaimer, and this list of conditions.
2. Redistributions in binary form must reproduce the above copyright
notice, disclaimer, and this list of conditions in the documenta-
tion and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this
software must display the following acknowledgment:
This product includes software developed by Greg Roelofs
and contributors for the book, "PNG: The Definitive Guide,"
published by O'Reilly and Associates.
LICENSE 2 (GNU GPL v2 or later):
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
---------------------------------------------------------------------------*/
#ifndef TRUE
# define TRUE 1
# define FALSE 0
#endif
#ifndef MAX
# define MAX(a,b) ((a) > (b)? (a) : (b))
# define MIN(a,b) ((a) < (b)? (a) : (b))
#endif
#ifdef DEBUG
# define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);}
#else
# define Trace(x) ;
#endif
enum rpng2_states {
kPreInit = 0,
kWindowInit,
kDone
};
typedef unsigned char uch;
typedef unsigned short ush;
typedef unsigned long ulg;
typedef struct _mainprog_info {
double display_exponent;
ulg width;
ulg height;
void *png_ptr;
void *info_ptr;
void (*mainprog_init)(void);
void (*mainprog_display_row)(ulg row_num);
void (*mainprog_finish_display)(void);
uch *image_data;
uch **row_pointers;
jmp_buf jmpbuf;
int passes; /* not used */
int pass;
int rowbytes;
int channels;
int need_bgcolor;
int state;
uch bg_red;
uch bg_green;
uch bg_blue;
} mainprog_info;
/* prototypes for public functions in readpng2.c */
void readpng2_version_info(void);
int readpng2_check_sig(uch *sig, int num);
int readpng2_init(mainprog_info *mainprog_ptr);
int readpng2_decode_data(mainprog_info *mainprog_ptr, uch *rawbuf, ulg length);
void readpng2_cleanup(mainprog_info *mainprog_ptr);
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/*---------------------------------------------------------------------------
wpng - simple PNG-writing program writepng.h
---------------------------------------------------------------------------
Copyright (c) 1998-2007 Greg Roelofs. All rights reserved.
This software is provided "as is," without warranty of any kind,
express or implied. In no event shall the author or contributors
be held liable for any damages arising in any way from the use of
this software.
The contents of this file are DUAL-LICENSED. You may modify and/or
redistribute this software according to the terms of one of the
following two licenses (at your option):
LICENSE 1 ("BSD-like with advertising clause"):
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute
it freely, subject to the following restrictions:
1. Redistributions of source code must retain the above copyright
notice, disclaimer, and this list of conditions.
2. Redistributions in binary form must reproduce the above copyright
notice, disclaimer, and this list of conditions in the documenta-
tion and/or other materials provided with the distribution.
3. All advertising materials mentioning features or use of this
software must display the following acknowledgment:
This product includes software developed by Greg Roelofs
and contributors for the book, "PNG: The Definitive Guide,"
published by O'Reilly and Associates.
LICENSE 2 (GNU GPL v2 or later):
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
---------------------------------------------------------------------------*/
#ifndef TRUE
# define TRUE 1
# define FALSE 0
#endif
#ifndef MAX
# define MAX(a,b) ((a) > (b)? (a) : (b))
# define MIN(a,b) ((a) < (b)? (a) : (b))
#endif
#ifdef DEBUG
# define Trace(x) {fprintf x ; fflush(stderr); fflush(stdout);}
#else
# define Trace(x) ;
#endif
#define TEXT_TITLE 0x01
#define TEXT_AUTHOR 0x02
#define TEXT_DESC 0x04
#define TEXT_COPY 0x08
#define TEXT_EMAIL 0x10
#define TEXT_URL 0x20
#define TEXT_TITLE_OFFSET 0
#define TEXT_AUTHOR_OFFSET 72
#define TEXT_COPY_OFFSET (2*72)
#define TEXT_EMAIL_OFFSET (3*72)
#define TEXT_URL_OFFSET (4*72)
#define TEXT_DESC_OFFSET (5*72)
typedef unsigned char uch;
typedef unsigned short ush;
typedef unsigned long ulg;
typedef struct _mainprog_info {
double gamma;
long width;
long height;
time_t modtime;
FILE *infile;
FILE *outfile;
void *png_ptr;
void *info_ptr;
uch *image_data;
uch **row_pointers;
char *title;
char *author;
char *desc;
char *copyright;
char *email;
char *url;
int filter; /* command-line-filter flag, not PNG row filter! */
int pnmtype;
int sample_depth;
int interlaced;
int have_bg;
int have_time;
int have_text;
jmp_buf jmpbuf;
uch bg_red;
uch bg_green;
uch bg_blue;
} mainprog_info;
/* prototypes for public functions in writepng.c */
void writepng_version_info(void);
int writepng_init(mainprog_info *mainprog_ptr);
int writepng_encode_image(mainprog_info *mainprog_ptr);
int writepng_encode_row(mainprog_info *mainprog_ptr);
int writepng_encode_finish(mainprog_info *mainprog_ptr);
void writepng_cleanup(mainprog_info *mainprog_ptr);
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