Import graphics/zimg, a scaling, colorspace conversion, and dithering

library.
ok op@ sthen@

The "z" library implements the commonly required image processing basics
of scaling, colorspace conversion, and depth conversion. A simple API
enables conversion between any supported formats to operate with minimal
knowledge from the programmer. All library routines were designed from
the ground-up with correctness, flexibility, and thread-safety as first
priorities. Allocation, buffering, and I/O are cleanly separated from
processing, allowing the programmer to adapt "z" to many scenarios.

graphics/zimg/Makefile

@@ -0,0 +1,27 @@
+COMMENT =	scaling, colorspace conversion, and dithering library
+CATEGORIES =	graphics
+
+SHARED_LIBS +=	zimg                      0.0 # 2.0
+
+GH_ACCOUNT =	sekrit-twc
+GH_PROJECT =	zimg
+GH_TAGNAME =	release-3.0.4
+
+MAINTAINER =	Brian Callahan <bcallah@openbsd.org>
+
+# WTFPL
+PERMIT_PACKAGE =	Yes
+
+WANTLIB += ${COMPILER_LIBCXX} m
+
+# C++14
+COMPILER =	base-clang ports-gcc
+
+CONFIGURE_STYLE =	autoreconf
+
+AUTOCONF_VERSION =	2.71
+AUTOMAKE_VERSION =	1.16
+
+FAKE_FLAGS =	exampledir="${PREFIX}/share/examples/zimg"
+
+.include <bsd.port.mk>

graphics/zimg/distinfo

@@ -0,0 +1,2 @@
+SHA256 (zimg-3.0.4.tar.gz) = IZ0bxrf94TVdcsm0BuvXMKSu2cIdp3lmDwpMhRJD4y8=
+SIZE (zimg-3.0.4.tar.gz) = 326578

graphics/zimg/patches/patch-Makefile_am

@@ -0,0 +1,14 @@
+Remove hardcoded -O2
+
+Index: Makefile.am
+--- Makefile.am.orig
++++ Makefile.am
+@@ -3,7 +3,7 @@ ACLOCAL_AMFLAGS = -I m4
+ SUBDIRS = $(CONFIG_SUBDIRS)
+ 
+ warningflags = -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
+-commonflags = -O2 $(warningflags) $(DEBUGCFLAGS) $(PTHREAD_CFLAGS)
++commonflags = $(warningflags) $(DEBUGCFLAGS) $(PTHREAD_CFLAGS)
+ AM_CXXFLAGS = -std=$(CXXSTD) $(commonflags)
+ AM_CFLAGS = -std=c89 $(commonflags)
+ LDADD = $(PTHREAD_LIBS)

graphics/zimg/pkg/DESCR

@@ -0,0 +1,7 @@
+The "z" library implements the commonly required image processing basics
+of scaling, colorspace conversion, and depth conversion. A simple API
+enables conversion between any supported formats to operate with minimal
+knowledge from the programmer. All library routines were designed from
+the ground-up with correctness, flexibility, and thread-safety as first
+priorities. Allocation, buffering, and I/O are cleanly separated from
+processing, allowing the programmer to adapt "z" to many scenarios.

graphics/zimg/pkg/PLIST

@@ -0,0 +1,25 @@
+include/zimg++.hpp
+include/zimg.h
+@static-lib lib/libzimg.a
+lib/libzimg.la
+@lib lib/libzimg.so.${LIBzimg_VERSION}
+lib/pkgconfig/zimg.pc
+share/doc/zimg/
+share/doc/zimg/COPYING
+share/doc/zimg/ChangeLog
+share/doc/zimg/README.md
+share/examples/zimg/
+share/examples/zimg/Makefile
+share/examples/zimg/api_example.cpp
+share/examples/zimg/api_example_c.c
+share/examples/zimg/hdr_example.cpp
+share/examples/zimg/interlace_example.cpp
+share/examples/zimg/misc/
+share/examples/zimg/misc/aligned_malloc.h
+share/examples/zimg/misc/argparse.cpp
+share/examples/zimg/misc/argparse.h
+share/examples/zimg/misc/mmap.cpp
+share/examples/zimg/misc/mmap.h
+share/examples/zimg/misc/win32_bitmap.cpp
+share/examples/zimg/misc/win32_bitmap.h
+share/examples/zimg/tile_example.cpp