lancemk / pyglfw

Python bindings for GLFW

pyGLFW

This module provides Python bindings for GLFW (on GitHub: glfw/glfw). It is a ctypes wrapper which keeps very close to the original GLFW API, except for:

• function names use the pythonic words_with_underscores notation instead of camelCase
• GLFW_ and glfw prefixes have been removed, as their function is replaced by the module namespace (you can use from glfw.GLFW import * if you prefer the naming convention used by the GLFW C API)
• structs have been replaced with Python sequences and namedtuples
• functions like glfwGetMonitors return a list instead of a pointer and an object count
• Gamma ramps use floats between 0.0 and 1.0 instead of unsigned shorts (use glfw.NORMALIZE_GAMMA_RAMPS=False to disable this)
• GLFW errors are reported as glfw.GLFWError warnings if no error callback is set (use glfw.ERROR_REPORTING=False to disable this, set it to 'warn' instead to issue warnings, set it to 'log' to log it using the 'glfw' logger or set it to a dict to define the behavior for specific error codes)
• instead of a sequence for GLFWimage structs, PIL/pillow Image objects can be used

Installation

pyGLFW can be installed using pip:

pip install glfw

Windows

The GLFW shared library and Visual C++ runtime are included in the Python wheels.

To use a different GLFW library, you can set PYGLFW_LIBRARY to its location.

macOS

The GLFW shared library for 64-bit is included in the Python wheels for macOS.

If you are using a 32-bit Python installation or otherwise cannot use the library downloaded with the wheel, you can build and install it yourself by compiling GLFW from source (use -DBUILD_SHARED_LIBS=ON).

pyGLFW will search for the library in a list of search paths (including those in DYLD_LIBRARY_PATH). If you want to use a specific library, you can set the PYGLFW_LIBRARY environment variable to its path.

Linux

The GLFW shared library is included in the Python wheels for Linux.

If you cannot use these on your system, you can install the GLFW shared library using a package management system (e.g. apt install libglfw3 on Debian or Ubuntu) or you can build and install it yourself by compiling GLFW from source (use -DBUILD_SHARED_LIBS=ON).

pyGLFW will search for the library in a list of search paths (including those in LD_LIBRARY_PATH). If you want to use a specific library, you can set the PYGLFW_LIBRARY environment variable to its path.

Development Version

If you are using the development version of GLFW and would like to use wrappers for currently unreleased macros and functions, you can instead install:

pip install glfw[preview]

or set the PYGLFW_PREVIEW environment variable.

Note, however, that there will be a slight delay between the development version of GLFW and the wrappers provided by this package.

Example Code

The example from the GLFW documentation ported to pyGLFW:

import glfw

def main():
    # Initialize the library
    if not glfw.init():
        return
    # Create a windowed mode window and its OpenGL context
    window = glfw.create_window(640, 480, "Hello World", None, None)
    if not window:
        glfw.terminate()
        return

    # Make the window's context current
    glfw.make_context_current(window)

    # Loop until the user closes the window
    while not glfw.window_should_close(window):
        # Render here, e.g. using pyOpenGL

        # Swap front and back buffers
        glfw.swap_buffers(window)

        # Poll for and process events
        glfw.poll_events()

    glfw.terminate()

if __name__ == "__main__":
    main()