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coalpy - compute abstraction layer for python

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# coalpy
Compute abstraction layer for python.

[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
[![Build Status](https://github.com/kecho/coalpy/actions/workflows/ci.yaml/badge.svg)](https://github.com/kecho/coalpy/actions/workflows/ci.yaml)

[CoalPy](https://coalpy.org) is a free low friction python (3.10, 3.11) native module for Windows and Linux. Coalpy's main goal is to make modern DirectX12 or Vulkan GPU compute software easy to write and deploy.

![seascape_example](https://raw.githubusercontent.com/kecho/coalpy/master/docs/images/seascape.png)

## Python module

Get started with API documentation here:
[coalpy.gpu documentation](https://coalpy.org/apidocs/0.51/coalpy.gpu.html)

To install, just run the pip command:

```
pip install coalpy
```

To check that coalpy is installed properly run the seascape example:

```
python -m coalpy.examples.seascape
```

And presto!

## About Contributing

The following section specifies guidelines for contributing to the coalpy project.

### Building requirements
* Install Python supported versions
    ** Preferably [3.11](https://www.python.org/downloads/release/python-3112/)
    ** Other versions include 3.10
* Ensure you have a version of visual studio with support for VC 
* Ensure you are on the latest and greatest version of windows 10

### Directories
* Source - everything inside here gets compiled by the build system.
    * modules - Internal c++ implementation of coalpy.
    * pymodules/gpu - The Python glue code, which translates the c++ coalpy module into public functions and types ready to be used in python.
    * scripts - Python scripts that get packaged with the coalpy module.
    * [libpng|libjpeg|zlib|imgui] - External libraries, which are compiled in source.
    * tests - Internal graphics and system test suites for coalpy, does not test the Python layer, only the internal layer.
* Build - Build scripts for the tundra build system.
* External - External precompiled libraries used.
* Tools - Executables and tools used to assist in building. In this case the tundra build system is contained here.
* docs - Documentation folder. This documentation utilizes github pages, which can be seen [here](https://kecho.github.io/coalpy/coalpy.gpu.html)

## Compiling in Windows

To compile in Windows, use the build.bat script file:

```
build.bat debug
```
for release mode
```
build.bat release
```

To generate a solution for visual studio, use the gensln.bat script:

```
gensln.bat
```

To run the internal c++ tests, run the coalpy_tests.exe program generated:

```
t2-output\win64-msvc-debug-default\coalpy_tests.exe
```

For information about the test suites commands, such as filters / repeating tests etc use the -h flag.

## Compiling in Linux (Ubuntu 20.x LTS+)
Before compiling into linux, the necessary dependencies must be installed.
For ubuntu apt package manager, you can run the script:

```
sudo ./linux-deps.sh
```

Then proceed to install vulkan lunar SDK as assigned below.

#### Vulkan Lunar SDK
Follow this by installing vulkan lunar SDK:
[vulkan lunar SDK](https://vulkan.lunarg.com/doc/view/latest/linux/getting_started_ubuntu.html)

### Compiling for Linux

To compile for Linux, use the build.sh script file:

```
./build.sh debug
```
for release mode
```
./build.sh release
```

## Creating Python package

cd into the t2-output\win64-msvc-[debug|release]-default\coalpy_pip directory. Run the command:

```
python -m build
```

Ensure you have the latest version of the build module. To configure metadata of the pip package modify things inside the Source/pipfiles folder.

## Updating documentation

All documentation of the coalpy Python API is self contained inside the Source/pymodules/gpu folder. Inside we fill doc strings inside types and functions exported to Python.
To generate the documentation, cd into the t2-output/win64-msvc-[release|debug|production]-default folder, and run the commands:

```
python -m pydoc -w coalpy
python -m pydoc -w coalpy.gpu
```

This will generate coalpy.html and coalpy.gpu.html which can be copied into the docs directory.

## Credits

Coalpy utilizes a few great open source libraries. Links with the authors and source provided here:

* [libjpeg - JPEG library by @LuaDist](https://github.com/LuaDist/libjpeg/)
* [libpng - PNG library by @glennrp](https://github.com/glennrp/libpng)
* [zlib - compression library by @madler](https://github.com/madler/zlib)
* [imgui - User interface library by @ocornut](https://github.com/ocornut/imgui)
* [DirectXShaderCompiler - hlsl compiler by @microsoft](https://github.com/microsoft/DirectXShaderCompiler)

Special thanks to my amazing wife Katie: I love you.

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