Legal notices updated

Rename contrib -> third-party intendes to express the origin and purpose
of that part of the code better. I plan to readd contrib/ again but with
more in-project things like bash-completions, dev workflow scripts etc.

6 files changed, 235 insertions, 0 deletions

diff --git a/third-party/libpng/1.zlib.patch b/third-party/libpng/1.zlib.patch
new file mode 100644
index 0000000..7a225e9
--- /dev/null
+++ b/third-party/libpng/1.zlib.patch
@@ -0,0 +1,41 @@
+diff '--color=auto' -aru a/CMakeLists.txt b/CMakeLists.txt
+--- a/CMakeLists.txt	2024-03-03 01:47:51.488773684 +0100
++++ b/CMakeLists.txt	2024-03-03 01:49:14.398777099 +0100
+@@ -37,10 +37,6 @@
+ set(PNGLIB_NAME libpng${PNGLIB_MAJOR}${PNGLIB_MINOR})
+ set(PNGLIB_VERSION ${PNGLIB_MAJOR}.${PNGLIB_MINOR}.${PNGLIB_RELEASE})
+ 
+-# needed packages
+-find_package(ZLIB REQUIRED)
+-include_directories(${ZLIB_INCLUDE_DIR})
+-
+ if(NOT WIN32)
+   find_library(M_LIBRARY
+     NAMES m
+@@ -182,7 +178,7 @@
+ endif()
+ 
+ # NOW BUILD OUR TARGET
+-include_directories(${CMAKE_CURRENT_SOURCE_DIR} ${ZLIB_INCLUDE_DIR})
++include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+ 
+ if(PNG_SHARED)
+   add_library(${PNG_LIB_NAME} SHARED ${libpng_sources})
+@@ -191,7 +187,7 @@
+     set_target_properties(${PNG_LIB_NAME} PROPERTIES PREFIX "lib")
+     set_target_properties(${PNG_LIB_NAME} PROPERTIES IMPORT_PREFIX "lib")
+   endif()
+-  target_link_libraries(${PNG_LIB_NAME} ${ZLIB_LIBRARY} ${M_LIBRARY})
++  target_link_libraries(${PNG_LIB_NAME} Zlib::zlib ${M_LIBRARY})
+ endif()
+ 
+ if(PNG_STATIC)
+@@ -202,7 +198,7 @@
+     # msvc does not append 'lib' - do it here to have consistent name
+     set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES PREFIX "lib")
+   endif()
+-  target_link_libraries(${PNG_LIB_NAME_STATIC} ${ZLIB_LIBRARY} ${M_LIBRARY})
++  target_link_libraries(${PNG_LIB_NAME_STATIC} Zlib::zlibstatic ${M_LIBRARY})
+ endif()
+ 
+ 
diff --git a/third-party/libpng/2.export.patch b/third-party/libpng/2.export.patch
new file mode 100644
index 0000000..089ff85
--- /dev/null
+++ b/third-party/libpng/2.export.patch
@@ -0,0 +1,16 @@
+diff '--color=auto' -arNu a/CMakeLists.txt b/CMakeLists.txt
+--- a/CMakeLists.txt	2024-03-03 02:11:53.952166254 +0100
++++ b/CMakeLists.txt	2024-03-03 02:11:16.832164723 +0100
+@@ -380,12 +380,6 @@
+           DESTINATION bin)
+ endif()
+ 
+-# On versions of CMake that support it, create an export file CMake
+-# users can include() to import our targets
+-if(PNG_EXPORT_RULE AND NOT SKIP_INSTALL_EXPORT AND NOT SKIP_INSTALL_ALL )
+-  install(EXPORT libpng DESTINATION lib/libpng FILE lib${PNG_LIB_NAME}.cmake)
+-endif()
+-
+ # what's with libpng-$VER%.txt and all the extra files?
+ 
+ 
diff --git a/third-party/libpng/3.includes.patch b/third-party/libpng/3.includes.patch
new file mode 100644
index 0000000..c48e163
--- /dev/null
+++ b/third-party/libpng/3.includes.patch
@@ -0,0 +1,37 @@
+diff '--color=auto' -arNu a/CMakeLists.txt b/CMakeLists.txt
+--- a/CMakeLists.txt	2024-03-03 02:11:16.832164723 +0100
++++ b/CMakeLists.txt	2024-03-03 02:19:25.775518136 +0100
+@@ -106,7 +106,6 @@
+ # Use the prebuilt pnglibconf.h file from the scripts folder
+ configure_file(${CMAKE_CURRENT_SOURCE_DIR}/scripts/pnglibconf.h.prebuilt
+                ${CMAKE_CURRENT_BINARY_DIR}/pnglibconf.h)
+-include_directories(${CMAKE_CURRENT_BINARY_DIR})
+ 
+ # OUR SOURCES
+ set(libpng_public_hdrs
+@@ -177,9 +176,6 @@
+   add_definitions(-DPNG_NO_FLOATING_POINT_SUPPORTED)
+ endif()
+ 
+-# NOW BUILD OUR TARGET
+-include_directories(${CMAKE_CURRENT_SOURCE_DIR})
+-
+ if(PNG_SHARED)
+   add_library(${PNG_LIB_NAME} SHARED ${libpng_sources})
+   if(MSVC)
+@@ -187,6 +183,7 @@
+     set_target_properties(${PNG_LIB_NAME} PROPERTIES PREFIX "lib")
+     set_target_properties(${PNG_LIB_NAME} PROPERTIES IMPORT_PREFIX "lib")
+   endif()
++  target_include_directories(${PNG_LIB_NAME} PUBLIC ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
+   target_link_libraries(${PNG_LIB_NAME} Zlib::zlib ${M_LIBRARY})
+ endif()
+ 
+@@ -198,6 +195,7 @@
+     # msvc does not append 'lib' - do it here to have consistent name
+     set_target_properties(${PNG_LIB_NAME_STATIC} PROPERTIES PREFIX "lib")
+   endif()
++  target_include_directories(${PNG_LIB_NAME_STATIC} PUBLIC ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
+   target_link_libraries(${PNG_LIB_NAME_STATIC} Zlib::zlibstatic ${M_LIBRARY})
+ endif()
+ 
diff --git a/third-party/libpng/4.aliases.patch b/third-party/libpng/4.aliases.patch
new file mode 100644
index 0000000..14d81d4
--- /dev/null
+++ b/third-party/libpng/4.aliases.patch
@@ -0,0 +1,19 @@
+diff '--color=auto' -arNu a/CMakeLists.txt b/CMakeLists.txt
+--- a/CMakeLists.txt	2024-03-03 12:45:31.540235890 +0100
++++ b/CMakeLists.txt	2024-03-03 12:46:11.986903772 +0100
+@@ -185,6 +185,7 @@
+   endif()
+   target_include_directories(${PNG_LIB_NAME} PUBLIC ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
+   target_link_libraries(${PNG_LIB_NAME} Zlib::zlib ${M_LIBRARY})
++  add_library(Png::png ALIAS ${PNG_LIB_NAME})
+ endif()
+ 
+ if(PNG_STATIC)
+@@ -197,6 +198,7 @@
+   endif()
+   target_include_directories(${PNG_LIB_NAME_STATIC} PUBLIC ${CMAKE_CURRENT_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR})
+   target_link_libraries(${PNG_LIB_NAME_STATIC} Zlib::zlibstatic ${M_LIBRARY})
++  add_library(Png::pngstatic ALIAS ${PNG_LIB_NAME_STATIC})
+ endif()
+ 
+ 
diff --git a/third-party/libpng/CMakeLists.txt b/third-party/libpng/CMakeLists.txt
new file mode 100644
index 0000000..c8aafb6
--- /dev/null
+++ b/third-party/libpng/CMakeLists.txt
@@ -0,0 +1,11 @@
+FetchContent_Declare(
+	libpng
+	URL
+		https://download.sourceforge.net/libpng/libpng-1.5.1.tar.gz
+		https://ftp.ignore.pl/starshatter/resources/mirror/libpng-1.5.1.tar.gz
+	URL_HASH SHA1=29afc7422d4d8af1066f8783ae148e298520d5ba
+	PATCH_COMMAND ${CMAKE_COMMAND} -D "PATCH_FILE=${CMAKE_CURRENT_SOURCE_DIR}/1.zlib.patch" -P ${PATCH_SCRIPT}
+	PATCH_COMMAND ${CMAKE_COMMAND} -D "PATCH_FILE=${CMAKE_CURRENT_SOURCE_DIR}/2.export.patch" -P ${PATCH_SCRIPT}
+	PATCH_COMMAND ${CMAKE_COMMAND} -D "PATCH_FILE=${CMAKE_CURRENT_SOURCE_DIR}/3.includes.patch" -P ${PATCH_SCRIPT}
+	PATCH_COMMAND ${CMAKE_COMMAND} -D "PATCH_FILE=${CMAKE_CURRENT_SOURCE_DIR}/4.aliases.patch" -P ${PATCH_SCRIPT}
+	DOWNLOAD_EXTRACT_TIMESTAMP No)
diff --git a/third-party/libpng/LICENSE b/third-party/libpng/LICENSE
new file mode 100644
index 0000000..b28f15c
--- /dev/null
+++ b/third-party/libpng/LICENSE
@@ -0,0 +1,111 @@
+
+This copy of the libpng notices is provided for your convenience.  In case of
+any discrepancy between this copy and the notices in the file png.h that is
+included in the libpng distribution, the latter shall prevail.
+
+COPYRIGHT NOTICE, DISCLAIMER, and LICENSE:
+
+If you modify libpng you may insert additional notices immediately following
+this sentence.
+
+This code is released under the libpng license.
+
+libpng versions 1.2.6, August 15, 2004, through 1.5.1, February 3, 2011, are
+Copyright (c) 2004, 2006-2011 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
+
+   Simon-Pierre Cadieux
+   Eric S. Raymond
+   Gilles Vollant
+
+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.
+
+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:
+
+   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:
+
+   John Bowler
+   Kevin Bracey
+   Sam Bushell
+   Magnus Holmgren
+   Greg Roelofs
+   Tom Tanner
+
+libpng versions 0.5, May 1995, through 0.88, January 1996, are
+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:
+
+   Andreas Dilger
+   Dave Martindale
+   Guy Eric Schalnat
+   Paul Schmidt
+   Tim Wegner
+
+The PNG Reference Library is supplied "AS IS".  The Contributing Authors
+and Group 42, Inc. disclaim all warranties, expressed or implied,
+including, without limitation, the warranties of merchantability and of
+fitness for any purpose.  The Contributing Authors and Group 42, Inc.
+assume no liability for direct, indirect, incidental, special, exemplary,
+or consequential damages, which may result from the use of the PNG
+Reference Library, even if advised of the possibility of such damage.
+
+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.
+
+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.
+
+The Contributing Authors and Group 42, Inc. specifically permit, without
+fee, and encourage the use of this source code as a component to
+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));
+
+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.
+
+Glenn Randers-Pehrson
+glennrp at users.sourceforge.net
+February 3, 2011