Expose glfwGetProcAddress in Context

[kivutar]

See https://www.glfw.org/docs/latest/group__context.html#ga35f1837e6f666781842483937612f163

[tapir]

function pointers and cgo are very messy to implement. what use case do you have for it?
is go-gl/gl missing something?

[kivutar]

I have a use case where I need to let a shared library call GetProcAddress. https://github.com/libretro/ludo/pull/91/files#diff-6a7f136db4c2e8bb2b91f3fa3b4079bdR374

This is a C version of this: https://github.com/heuripedes/sdlarch/blob/master/sdlarch.c#L582
That I'm trying to adapt to go.

[tapir]

you can't call the function that you get the adress for though. you need an intermediary C function where you call it thus it makes more sense to have specific C functions for the job and wrap them instead of getProcAddress.

…

On Wed, 2 Jan 2019, 06:28 Jean-André Santoni ***@***.*** wrote: I have a use case where I need to let a shared library call GetProcAddress. https://github.com/libretro/ludo/pull/91/files#diff-6a7f136db4c2e8bb2b91f3fa3b4079bdR374 This is a C version of this: https://github.com/heuripedes/sdlarch/blob/master/sdlarch.c#L582 That I'm trying to adapt to go. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#234 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AANq8OfVhnmzb-wnQluOuwrvLf-huPoiks5u_CdWgaJpZM4Zk0vY> .

[kivutar]

I need to avoid using glfw functions in my libretro package, because this package is a go binding for a C library and it has to remain agnostic. Some people may want to use it with SDL, some other with pure Windows or Apple rendering libs.

[GeertJohan]

I believe the Drakirus/go-flutter-desktop-embedder project would benefit from a properly exported glfwGetProcAddress. Please see go-flutter-desktop/go-flutter#68 for more details.

The go code over there doesn't need to call the functions that are returned by glfwGetProcAddress, but it does need to provide a callback wrapper around glfwGetProcAddress so that the third party library (Flutter) may properly resolve GL functions via glfw.

[GeertJohan]

Thanks @tapir