[Mesa-dev] [PATCH] egl: Introduce eglGetDisplayMESA()
brianp at vmware.com
Thu May 27 08:57:43 PDT 2010
Kristian Høgsberg wrote:
> This patch introduces a new extension to allow different ways to
> create an EGLDisplay to exist within the same libEGL.so. The new
> extension, EGL_MESA_get_display, introduces a new entrypoint:
> EGLDisplay eglGetDisplayMESA(EGLint type, void *display)
> which takes an integer to identify the type of display to get and a
> void pointer to provide extra parameters for the display type in
> question. At this point, three different display types are supported,
> EGLNativeDisplayType, DRM display and XCB display.
> Since an application needs to have an EGLDisplay before it can query
> for extensions, the way to discover this extension is to just use
> Ok, thinking about this some more, the whole deal with passing in a
> custom struct to eglGetDisplay() and relying on the layout of the X
> Display struct was just a little too magic. And since any application
> using that needs to know about those structs and the display type
> defines anyway, we may just as well make a new entrypoint. This feels
> a lot simpler and more robust, and we trade the eglplatform.h
> additions that Chia-I didn't like for a new extension in eglext.h.
I haven't had time to follow the EGL work much lately.
Could you write an extensions spec for this? See docs/MESA_*.spec for
In the spec, could you explain in more detail what problem this
extension solves and maybe give an example of how it would be used?
Should the dri2_get_driver_for_fd() function and related code be put
into a separate source file? It seems it might be useful in other
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