mirror of https://github.com/opencv/opencv.git
Open Source Computer Vision Library
https://opencv.org/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
229 lines
15 KiB
229 lines
15 KiB
| CI | Stable | Develop | |
|
|:---|:-------|:--------| |
|
| GitHub Actions | [](https://github.com/zlib-ng/zlib-ng/actions/workflows/cmake.yml?query=branch%3Astable) <br> [](https://github.com/zlib-ng/zlib-ng/actions/workflows/configure.yml?query=branch%3Astable) <br> [](https://github.com/zlib-ng/zlib-ng/actions/workflows/nmake.yml?query=branch%3Astable) | [](https://github.com/zlib-ng/zlib-ng/actions/workflows/cmake.yml?query=branch%3Adevelop) <br> [](https://github.com/zlib-ng/zlib-ng/actions/workflows/configure.yml?query=branch%3Adevelop) <br> [](https://github.com/zlib-ng/zlib-ng/actions/workflows/nmake.yml?query=branch%3Adevelop) | |
|
| CodeFactor | [](https://www.codefactor.io/repository/github/zlib-ng/zlib-ng/overview/stable) | [](https://www.codefactor.io/repository/github/zlib-ng/zlib-ng/overview/develop) | |
|
| OSS-Fuzz | [](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:zlib-ng) | [](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:zlib-ng) | |
|
| Codecov | [](https://codecov.io/github/zlib-ng/zlib-ng/tree/stable) | [](https://codecov.io/github/zlib-ng/zlib-ng/tree/develop) | |
|
|
|
## zlib-ng |
|
*zlib data compression library for the next generation systems* |
|
|
|
Maintained by Hans Kristian Rosbach |
|
aka Dead2 (zlib-ng àt circlestorm dót org) |
|
|
|
Features |
|
-------- |
|
|
|
* Zlib compatible API with support for dual-linking |
|
* Modernized native API based on zlib API for ease of porting |
|
* Modern C11 syntax and a clean code layout |
|
* Deflate medium and quick algorithms based on Intel’s zlib fork |
|
* Support for CPU intrinsics when available |
|
* Adler32 implementation using SSSE3, AVX2, AVX512, AVX512-VNNI, Neon, VMX & VSX |
|
* CRC32-B implementation using PCLMULQDQ, VPCLMULQDQ, ACLE, & IBM Z |
|
* Slide hash implementations using SSE2, AVX2, ARMv6, Neon, VMX & VSX |
|
* Compare256 implementations using SSE2, AVX2, Neon, POWER9 & RVV |
|
* Inflate chunk copying using SSE2, SSSE3, AVX, Neon & VSX |
|
* Support for hardware-accelerated deflate using IBM Z DFLTCC |
|
* Unaligned memory read/writes and large bit buffer improvements |
|
* Includes improvements from Cloudflare and Intel forks |
|
* Configure, CMake, and NMake build system support |
|
* Comprehensive set of CMake unit tests |
|
* Code sanitizers, fuzzing, and coverage |
|
* GitHub Actions continuous integration on Windows, macOS, and Linux |
|
* Emulated CI for ARM, AARCH64, PPC, PPC64, RISCV, SPARC64, S390x using qemu |
|
|
|
|
|
History |
|
------- |
|
|
|
The motivation for this fork was seeing several 3rd party contributions with new optimizations not getting |
|
implemented into the official zlib repository. |
|
|
|
Mark Adler has been maintaining zlib for a very long time, and he has done a great job and hopefully he will continue |
|
for a long time yet. The idea of zlib-ng is not to replace zlib, but to co-exist as a drop-in replacement with a |
|
lower threshold for code change. |
|
|
|
zlib has a long history and is incredibly portable, even supporting many systems that predate the Internet.<br> |
|
That is great, but it can complicate further development and maintainability. The zlib code contains many workarounds |
|
for really old compilers or to accommodate systems with limitations such as operating in a 16-bit environment. |
|
|
|
Many of these workarounds are only maintenance burdens, some of them are pretty huge code-wise. With many workarounds |
|
cluttered throughout the code, it makes it harder for new programmers with an idea/interest for zlib to contribute. |
|
|
|
I decided to make a fork, merge all the Intel optimizations, some of the Cloudflare optimizations, plus a couple other |
|
smaller patches. Then started cleaning out workarounds, various dead code, all contrib and example code.<br> |
|
The result is a better performing and easier to maintain zlib-ng. |
|
|
|
A lot of improvements have gone into zlib-ng since its start, and numerous people and companies have contributed both |
|
small and big improvements, or valuable testing. |
|
|
|
|
|
Build |
|
----- |
|
<sup>Please read LICENSE.md, it is very simple and very liberal.</sup> |
|
|
|
There are two ways to build zlib-ng: |
|
|
|
### Cmake |
|
|
|
To build zlib-ng using the cross-platform makefile generator cmake. |
|
|
|
``` |
|
cmake . |
|
cmake --build . --config Release |
|
ctest --verbose -C Release |
|
``` |
|
|
|
Alternatively, you can use the cmake configuration GUI tool ccmake: |
|
|
|
``` |
|
ccmake . |
|
``` |
|
|
|
### Configure |
|
|
|
To build zlib-ng using the bash configure script: |
|
|
|
``` |
|
./configure |
|
make |
|
make test |
|
``` |
|
|
|
Build Options |
|
------------- |
|
|
|
| CMake | configure | Description | Default | |
|
|:---------------------------|:-------------------------|:------------------------------------------------------------------------------------|---------| |
|
| ZLIB_COMPAT | --zlib-compat | Compile with zlib compatible API | OFF | |
|
| ZLIB_ENABLE_TESTS | | Build test binaries | ON | |
|
| WITH_GZFILEOP | --without-gzfileops | Compile with support for gzFile related functions | ON | |
|
| WITH_OPTIM | --without-optimizations | Build with optimisations | ON | |
|
| WITH_NEW_STRATEGIES | --without-new-strategies | Use new strategies | ON | |
|
| WITH_NATIVE_INSTRUCTIONS | | Compiles with full instruction set supported on this host (gcc/clang -march=native) | OFF | |
|
| WITH_RUNTIME_CPU_DETECTION | | Compiles with runtime CPU detection | ON | |
|
| WITH_SANITIZER | | Build with sanitizer (memory, address, undefined) | OFF | |
|
| WITH_GTEST | | Build gtest_zlib | ON | |
|
| WITH_FUZZERS | | Build test/fuzz | OFF | |
|
| WITH_BENCHMARKS | | Build test/benchmarks | OFF | |
|
| WITH_MAINTAINER_WARNINGS | | Build with project maintainer warnings | OFF | |
|
| WITH_CODE_COVERAGE | | Enable code coverage reporting | OFF | |
|
|
|
|
|
Install |
|
------- |
|
|
|
WARNING: We do not recommend manually installing unless you really know what you are doing, because this can |
|
potentially override the system default zlib library, and any incompatibility or wrong configuration of zlib-ng |
|
can make the whole system unusable, requiring recovery or reinstall. |
|
If you still want a manual install, we recommend using the /opt/ path prefix. |
|
|
|
For Linux distros, an alternative way to use zlib-ng (if compiled in zlib-compat mode) instead of zlib, is through |
|
the use of the _LD_PRELOAD_ environment variable. If the program is dynamically linked with zlib, then the program |
|
will temporarily attempt to use zlib-ng instead, without risking system-wide instability. |
|
|
|
``` |
|
LD_PRELOAD=/opt/zlib-ng/libz.so.1.2.13.zlib-ng /usr/bin/program |
|
``` |
|
|
|
### Cmake |
|
|
|
To install zlib-ng system-wide using cmake: |
|
|
|
```sh or powershell |
|
cmake --build . --target install |
|
``` |
|
|
|
### Configure |
|
|
|
To install zlib-ng system-wide using the configure script: |
|
|
|
```sh |
|
make install |
|
``` |
|
|
|
### CPack |
|
|
|
After building with cmake, an installation package can be created using cpack. By default a tgz package is created, |
|
but you can append `-G <format>` to each command to generate alternative packages types (TGZ, ZIP, RPM, DEB). To easily |
|
create a rpm or deb package, you would use `-G RPM` or `-G DEB` respectively. |
|
|
|
```sh or powershell |
|
cd build |
|
cpack --config CPackConfig.cmake |
|
cpack --config CPackSourceConfig.cmake |
|
``` |
|
|
|
### Vcpkg |
|
|
|
Alternatively, you can build and install zlib-ng using the [vcpkg](https://github.com/Microsoft/vcpkg/) dependency manager: |
|
|
|
```sh or powershell |
|
git clone https://github.com/Microsoft/vcpkg.git |
|
cd vcpkg |
|
./bootstrap-vcpkg.sh # "./bootstrap-vcpkg.bat" for powershell |
|
./vcpkg integrate install |
|
./vcpkg install zlib-ng |
|
``` |
|
|
|
The zlib-ng port in vcpkg is kept up to date by Microsoft team members and community contributors. |
|
If the version is out of date, please [create an issue or pull request](https://github.com/Microsoft/vcpkg) on the vcpkg repository. |
|
|
|
Contributing |
|
------------ |
|
|
|
Zlib-ng is aiming to be open to contributions, and we would be delighted to receive pull requests on github. |
|
Help with testing and reviewing pull requests etc is also very much appreciated. |
|
|
|
Please check the Wiki for more info: [Contributing](https://github.com/zlib-ng/zlib-ng/wiki/Contributing) |
|
|
|
Acknowledgments |
|
---------------- |
|
|
|
Thanks go out to all the people and companies who have taken the time to contribute |
|
code reviews, testing and/or patches. Zlib-ng would not have been nearly as good without you. |
|
|
|
The deflate format used by zlib was defined by Phil Katz.<br> |
|
The deflate and zlib specifications were written by L. Peter Deutsch. |
|
|
|
zlib was originally created by Jean-loup Gailly (compression) and Mark Adler (decompression). |
|
|
|
|
|
Advanced Build Options |
|
---------------------- |
|
|
|
| CMake | configure | Description | Default | |
|
|:--------------------------------|:----------------------|:--------------------------------------------------------------------|------------------------| |
|
| FORCE_SSE2 | --force-sse2 | Skip runtime check for SSE2 instructions (Always on for x86_64) | OFF (x86) | |
|
| WITH_AVX2 | | Build with AVX2 intrinsics | ON | |
|
| WITH_AVX512 | | Build with AVX512 intrinsics | ON | |
|
| WITH_AVX512VNNI | | Build with AVX512VNNI intrinsics | ON | |
|
| WITH_SSE2 | | Build with SSE2 intrinsics | ON | |
|
| WITH_SSSE3 | | Build with SSSE3 intrinsics | ON | |
|
| WITH_SSE42 | | Build with SSE42 intrinsics | ON | |
|
| WITH_PCLMULQDQ | | Build with PCLMULQDQ intrinsics | ON | |
|
| WITH_VPCLMULQDQ | --without-vpclmulqdq | Build with VPCLMULQDQ intrinsics | ON | |
|
| WITH_ACLE | --without-acle | Build with ACLE intrinsics | ON | |
|
| WITH_NEON | --without-neon | Build with NEON intrinsics | ON | |
|
| WITH_ARMV6 | --without-armv6 | Build with ARMv6 intrinsics | ON | |
|
| WITH_ALTIVEC | --without-altivec | Build with AltiVec (VMX) intrinsics | ON | |
|
| WITH_POWER8 | --without-power8 | Build with POWER8 optimisations | ON | |
|
| WITH_RVV | | Build with RVV intrinsics | ON | |
|
| WITH_CRC32_VX | --without-crc32-vx | Build with vectorized CRC32 on IBM Z | ON | |
|
| WITH_DFLTCC_DEFLATE | --with-dfltcc-deflate | Build with DFLTCC intrinsics for compression on IBM Z | OFF | |
|
| WITH_DFLTCC_INFLATE | --with-dfltcc-inflate | Build with DFLTCC intrinsics for decompression on IBM Z | OFF | |
|
| WITH_UNALIGNED | --without-unaligned | Allow optimizations that use unaligned reads if safe on current arch| ON | |
|
| WITH_INFLATE_STRICT | | Build with strict inflate distance checking | OFF | |
|
| WITH_INFLATE_ALLOW_INVALID_DIST | | Build with zero fill for inflate invalid distances | OFF | |
|
| INSTALL_UTILS | | Copy minigzip and minideflate during install | OFF | |
|
| ZLIBNG_ENABLE_TESTS | | Test zlib-ng specific API | ON | |
|
|
|
|
|
Related Projects |
|
---------------- |
|
|
|
* Fork of the popular minizip https://github.com/zlib-ng/minizip-ng |
|
* Python tool to benchmark minigzip/minideflate https://github.com/zlib-ng/deflatebench |
|
* Python tool to benchmark pigz https://github.com/zlib-ng/pigzbench |
|
* 3rd party patches for zlib-ng compatibility https://github.com/zlib-ng/patches
|
|
|