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Library with colormaps for C++

License: GNU General Public License v3.0

C++ 94.07% CMake 4.17% Python 1.76%

colorbrewer colormap cpp cppmat python python3

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cppcolormap's Issues

Read/write JSON files

Please complete the JSON file functionality.

Failing to build python bindings

Hi! Built the tests fine, but gcc doesn't seem to like the signatures in the python bindings

error: invalid 'static_cast' from type '<unresolved overloaded function type>' to type 'std::string (*)(const xt::pytensor<double, 1, xt::layout_type::dynamic>&)' {aka 'std::__cxx11::basic_string<char> (*)(const xt::pytensor<dou
       │ ble, 1, xt::layout_type::dynamic>&)'}
  69   │    61 |         static_cast<std::string (*)(const xt::pytensor<double, 1>&)>(&cppcolormap::rgb2hex),

Logs: https://gist.github.com/SomeoneSerge/2507244e5bc3b11982948ff0ed86a681
Getting the same error with gcc11 and gcc12.
Pybind11 version: pybind11-2.10.3/include (found version "2.10.3")
Built with: SomeoneSerge/pkgs@b0274d7

Update clang-format

https://stackoverflow.com/a/59574671/2646505

Apply PackConstructorInitializers and remove

// clang-format off
...
// clang-format on

I have some problems when I try to compile cppcolormap on my Linux machine. On my windows machine everything compiles without errors. Is there a simple solution to fix this issue?
Some of the errors occur several times so I attached only a snippet of them.

Architecture is:
Ubuntu 18.04.5 LTS x86_64

Used package versions:
xtl-0.6.11
xtensor-0.21.3

/opt/xtensor-win/include/xtensor/xutils.hpp:347:17: note:   no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘xt::fixed_shape<>&’
In file included from /home/espu/Desktop/AMADEUS.u/plain_cpp_headers/helper_headers/Intensity_To_RGB_Converter.h:22:0,
                 from /home/espu/Desktop/AMADEUS.u/plain_cpp_sources/helper_sources/Intensity_To_RGB_Converter.cpp:1:
/home/espu/Desktop/AMADEUS.u/plain_cpp_headers/helper_headers/cppcolormap.h: In function ‘xt::xtensor<double, 2> cppcolormap::Accent_r(size_t)’:
/home/espu/Desktop/AMADEUS.u/plain_cpp_headers/helper_headers/cppcolormap.h:3144:70: error: could not convert ‘xt::flip<xt::xtensor_container<xt::uvector<double, std::allocator<double> >, 2, (xt::layout_type)1, xt::xtensor_expression_tag> >(cppcolormap::Accent(size_t)(), 0)’ from ‘void’ to ‘xt::xtensor<double, 2> {aka xt::xtensor_container<xt::uvector<double, std::allocator<double> >, 2, (xt::layout_type)1, xt::xtensor_expression_tag>}’
 nline xt::xtensor<double,2> Accent_r(size_t N = 8) { return xt::flip(Accent(N), 0); }
                                                             ~~~~~~~~^~~~~~~~~~~~~~
/home/espu/Desktop/AMADEUS.u/plain_cpp_headers/helper_headers/cppcolormap.h: In function ‘xt::xtensor<double, 2> cppcolormap::Dark2_r(size_t)’:
/home/espu/Desktop/AMADEUS.u/plain_cpp_headers/helper_headers/cppcolormap.h:3145:69: error: could not convert ‘xt::flip<xt::xtensor_container<xt::uvector<double, std::allocator<double> >, 2, (xt::layout_type)1, xt::xtensor_expression_tag> >(cppcolormap::Dark2(size_t)(), 0)’ from ‘void’ to ‘xt::xtensor<double, 2> {aka xt::xtensor_container<xt::uvector<double, std::allocator<double> >, 2, (xt::layout_type)1, xt::xtensor_expression_tag>}’
 inline xt::xtensor<double,2> Dark2_r(size_t N = 8) { return xt::flip(Dark2(N), 0); }
                                                             ~~~~~~~~^~~~~~~~~~~~~
/home/espu/Desktop/AMADEUS.u/plain_cpp_headers/helper_headers/cppcolormap.h: In function ‘xt::xtensor<double, 2> cppcolormap::Paired_r(size_t)’:
/home/espu/Desktop/AMADEUS.u/plain_cpp_headers/helper_headers/cppcolormap.h:3146:71: error: could not convert ‘xt::flip<xt::xtensor_container<xt::uvector<double, std::allocator<double> >, 2, (xt::layout_type)1, xt::xtensor_expression_tag> >(cppcolormap::Paired(size_t)(), 0)’ from ‘void’ to ‘xt::xtensor<double, 2> {aka xt::xtensor_container<xt::uvector<double, std::allocator<double> >, 2, (xt::layout_type)1, xt::xtensor_expression_tag>}’
 line xt::xtensor<double,2> Paired_r(size_t N = 12) { return xt::flip(Paired(N), 0); }
                                                             ~~~~~~~~^~~~~~~~~~~~~~
/home/espu/Desktop/AMADEUS.u/plain_cpp_headers/helper_headers/cppcolormap.h: In function ‘xt::xtensor<double, 2> cppcolormap::Spectral_r(size_t)’:
/home/espu/Desktop/AMADEUS.u/plain_cpp_headers/helper_headers/cppcolormap.h:3147:73: error: could not convert ‘xt::flip<xt::xtensor_container<xt::uvector<double, std::allocator<double> >, 2, (xt::layout_type)1, xt::xtensor_expression_tag> >(cppcolormap::Spectral(size_t)(), 0)’ from ‘void’ to ‘xt::xtensor<double, 2> {aka xt::xtensor_container<xt::uvector<double, std::allocator<double> >, 2, (xt::layout_type)1, xt::xtensor_expression_tag>}’
 ne xt::xtensor<double,2> Spectral_r(size_t N = 11) { return xt::flip(Spectral(   ), 0); }
                                                             ~~~~~~~~^~~~~~~~~~~~~~~~~~

home/espu/Desktop/AMADEUS.u/plain_cpp_headers/helper_headers/cppcolormap.h: In function ‘xt::xtensor<double, 2> cppcolormap::YellowOrange(size_t)’:
/home/espu/Desktop/AMADEUS.u/plain_cpp_headers/helper_headers/cppcolormap.h:3137:24: error: no match for ‘operator/’ (operand types are ‘xt::xtensor<double, 2> {aka xt::xtensor_container<xt::uvector<double, std::allocator<double> >, 2, (xt::layout_type)1, xt::xtensor_expression_tag>}’ and ‘double’)
     return interp(data / 255.0, N);

Update CI + readme

Use conda prefix in CI to install
Add compile instructions

Add basic tests + CI (+readme badge)

High-level API

I was looking for a way to use cppcolormap to convert a 2D xarray into a 3D xarray (the added dimension being RGB), as you would do with matplotlib, e.g.:

# in python using matplotlib
a2 = plt.cm.viridis(a1)

I think using xt::vectorize is the way to go, but I'm not sure. Or maybe it already exists in this library and I missed it?

Update readme with new colormaps

Confirm save before quit

Add a dialog to prompt the user to save the modified results before the program is closed.

Map to terminal colors

This is not entirely serious, but could be a cool feature:

Modern terminals can handle 256 colors, which are mapped to some values here: https://jonasjacek.github.io/colors/

This website also has a JSON file.

What I am wondering is wether we could map the (interpolated) RGB colors to terminal colors and then return a vector colormap of terminal colors so that we could plot a heatmap like this with different color schemes:

Add autodoc

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