A very minimal OpenGL ES 2.0 library for Zig. Opens you a window and let's you draw things. Comes with a pixel-perfect 2D renderer and maybe some day even with a bit of a 3D api.

Very work in progress. Right now it's more a proof of concept than everything else

• Support the following platforms
  • Wasm
  • Linux Desktop
  • Windows Desktop (not tested, but should work via SDL2)
  • Android
• Create an OpenGL ES 2.0 context
• Provide input events
  • Single pointer motion (finger or mouse)
  • Single click event (finger, mouse)
  • Text input for keyboard (utf-8 encoded)
• Provide window events
  • Resize
  • Close
• Provide access to the underlying backend
• Allow creation of single-file applications
  • Single executable for easy distribution
  • Embedded resources

• Pixel perfect drawing of
  • Lines
  • Rectangles
  • Images
    • Basic "copy full texture to rectangle"
    • Copy portion of texture ("atlas rendering")
• TTF font rendering via stb_ttf
• Image loading via zigimg
• Stack based/nested scissoring

• Support for desktop linux
• Mobile linux (PinePhone) supported as well
• Browser support via Wasm
• coming soon: Android support
• Pixel perfect 2D rendering

• SDL2

• js glue code

• Android SDK
• Android NDK
• Android Build Tools
• OpenJDK
• some other tools

Requires SDL2 to be installed.

zig build run

A window should open with the application in fullscreen.

Includes a teeny tiny web server for debugging.

zig build install run-wasm

Now visit http://127.0.0.1:8000/index.htm to see the demo.

Connect your phone first and install both a JDK as well as the Android SDK with NDK included. The ZeroGraphics build system will tell you if it couldn't auto-detect the SDK paths.

zig build -Denable-android run-app

The app should now be installed and started on your phone.