add open_htj2k_support

[osamu620]

related to #3

[palemieux]

@osamu620 Does OpenHTJ2K require Cxx17 by any chance?

Compilation dies on #include <filesystem>

[osamu620]

@osamu620 Does OpenHTJ2K require Cxx17 by any chance?

Compilation dies on #include <filesystem>

Yes. The threadpool class uses C++17 features.

[palemieux]

@osamu620 Does OpenHTJ2K require Cxx17 by any chance?

Compilation dies on #include <filesystem>

Yes. The threadpool class uses C++17 features.

Which version of GCC should I use?

[palemieux]

@osamu620 Does OpenHTJ2K require Cxx17 by any chance?

Compilation dies on #include <filesystem>

Yes. The threadpool class uses C++17 features.

Which version of GCC should I use?

It looks like GCC10 should work.

[osamu620]

@palemieux
I have confirmed GCC10 (gcc-10 (Ubuntu 10.3.0-15ubuntu1) 10.3.0) works.

[palemieux]

@osamu620 j2k_ht_ohtj2k fails on RGBA images

./build/libench j2k_ht_ohtj2k src/test/resources/images/rgba.png

[palemieux]

@osamu620 Can you add j2k_ht_ohtj2k to the Python script:

f0aa58d

[michaeldsmith]

why not just add this line to CMakeLists.txt to require C++ 17 for all platforms?

set(CMAKE_CXX_STANDARD 17)

[palemieux]

why not just add this line to CMakeLists.txt to require C++ 17 for all platforms?

Not all Linux distributions ship with a GCC toolchain that support C++ 17.

[osamu620]

@palemieux @michaeldsmith
A bug on RGBA images in OpenHTJ2K is fixed. And I have modified some C++17 or C++14-specific features. Now, C++11 compilers can compile OpenHTJ2K.

[palemieux]

@osamu620 You might have forgotten to update the OpenHTJ2K submodule. Also, the library outputs Tile num x = 1, y = 1 repeatedly to stdout. How can the latter be suppressed?