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Glow

Glow is an OpenGL binding generator for Go. Glow parses the OpenGL XML API registry to produce a machine-generated cgo bridge between Go functions and native OpenGL functions. Glow is a fork of GoGL2.

Features:

  • Go functions that mirror the C specification using Go types.
  • Support for multiple OpenGL APIs (GL/GLES/EGL/WGL/GLX/EGL), versions, and profiles.
  • Support for extensions (including debug callbacks).

See the open issues for caveats about the current state of the implementation.

Generated Packages

Generated OpenGL binding packages are available in the go-gl/gl repository.

Custom Packages

If the prebuilt, go-gettable packages are not suitable for your needs you can build your own. For example,

go get github.com/go-gl/glow
cd $GOPATH/src/github.com/go-gl/glow
go build
./glow download
./glow generate -api=gl -version=3.3 -profile=core -remext=GL_ARB_cl_event
go install ./gl-core/3.3/gl

A few notes about the flags to generate:

  • api: One of gl, gles1, gles2, egl, wgl, or glx.
  • version: The API version to generate. The all pseudo-version includes all functions and enumerations for the specified API.
  • profile: For gl packages with version 3.2 or higher, core or compatibility (explanation).
  • xml: The XML directory.
  • tmpl: The template directory.
  • out: The output directory for generated files.
  • addext: If non-empty, a regular expression describing which extensions to include in addition to those supported by the selected profile. Empty by default, including nothing additional. Takes precedence over explicit removal.
  • remext: If non-empty, a regular expression describing which extensions to exclude. Empty by default, excluding nothing.
  • restrict: A JSON file that explicitly lists what enumerations / functions that Glow should generate (see example.json).
  • lenientInit: Flag to disable strict function availability checks at Init time. By default if any non-extension function pointer cannot be loaded then initialization fails; when this flag is set initialization will succeed with missing functions. Note that on some platforms unavailable functions will load successfully even but fail upon invocation so check against the OpenGL context what is supported.

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Go binding generator and bindings for OpenGL

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