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galogen's Introduction

Galogen

Galogen generates code to load OpenGL entry points for the exact API version, profile and extensions that you specify.

Please visit http://galogen.gpfault.net/ for more info.

Usage:

galogen <path to GL registry XML file> [options]

Options:

  • --api - should be "gl" for OpenGL, "gles1" for OpenGL ES 1, or "gles2" for OpenGL ES 2 or 3.
  • --ver - version of the API, e.g. 4.5 for OpenGL 4.5. Default is 4.0 for desktop OpenGL, 2.0 for OpenGL ES.
  • --profile - which API profile to use. Set to "core" for core profile, "compatibility" for compatibility profile. Default is "compatibility".
  • --exts - comma-separated list of extensions to add. Default is empty.
  • --filename - name for generated file(s). Default is "gl".

Example:

./galogen gl.xml --api gl --ver 4.5 --profile core --filename gl_core_45

Disclaimer

This is not an official Google product (experimental or otherwise), it is just code that happens to be owned by Google.

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galogen's Issues

VS2017 compile error when looking up wglGetProcAddress

I'm getting a compile error in VS2017 where wglGetProcAddress is looked up from opengl32.dll:

1>gl.c
1>c:\projects\sokol-samples\sapp\gl.c(12): error C2220: warning treated as error - no 'object' file generated
1>c:\projects\sokol-samples\sapp\gl.c(12): warning C4113: 'FARPROC' differs in parameter lists from 'PROC (__cdecl *)(LPCSTR)'
1>c:\projects\sokol-samples\sapp\gl.c(12): warning C4047: '=': 'PROC (__cdecl *)(LPCSTR)' differs in levels of indirection from 'FARPROC'

Changing the (PROC) cast to the function signature fixes the problem:

    wgl_get_proc_address = (PROC(WINAPI*)(LPCSTR))GetProcAddress(opengl32module, "wglGetProcAddress");

After that fix, everything worked :)

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