Constant fermium::hints::SDL_HINT_OPENGL_ES_DRIVER

pub const SDL_HINT_OPENGL_ES_DRIVER: &[u8];

A variable controlling what driver to use for OpenGL ES contexts.

On some platforms, currently Windows and X11, OpenGL drivers may support creating contexts with an OpenGL ES profile. By default SDL uses these profiles, when available, otherwise it attempts to load an OpenGL ES library, e.g. that provided by the ANGLE project. This variable controls whether SDL follows this default behavior or will always load an OpenGL ES library.

Circumstances where this is useful include

• Testing an app with a particular OpenGL ES implementation, e.g ANGLE, or emulator, e.g. those from ARM, Imagination or Qualcomm.
• Resolving OpenGL ES function addresses at link time by linking with the OpenGL ES library instead of querying them at run time with SDL_GL_GetProcAddress().

Caution: for an application to work with the default behavior across different OpenGL drivers it must query the OpenGL ES function addresses at run time using SDL_GL_GetProcAddress.

This variable is ignored on most platforms because OpenGL ES is native or not supported.

This variable can be set to the following values:

• “0”: Use ES profile of OpenGL, if available. (Default when not set.)
• “1”: Load OpenGL ES library using the default library names.