On 02/25/2013 11:58 PM, Pekka Paalanen wrote: > On Mon, 25 Feb 2013 09:09:22 -0800 > Chad Versace <chad.vers...@linux.intel.com> wrote:
> Thank you for the reply. Indeed, that dance to check for the extension > is non-trivial, and I think it might be good to explain somehow in the > spec, maybe in the Q&A section? Yes, I'll add the topic to the Issues section. > I quickly checked the EGL 1.4 spec, and could not spot any mention of > whether eglGetProcAddress needs a valid context or display or anything. > Does it require any initialization? Well, should not matter much I > guess, since in any case you have to open a display first to get the > extensions string. > > Btw. what is EGL_DEFAULT_DISPLAY in Mesa, what does it give us? Ah, that is complicated. In the Mesa configuration that nearly everyone uses, eglGetDisplay(EGL_DEFAULT_DISPLAY) calls XOpenDisplay(NULL) to acquire the display. If Mesa is configured as Wayland-centric, though, then eglGetDisplay(EGL_DEFAULT_DISPLAY) calls wayland_display_connect(NULL) to acquire the display. It's also possible to select to which platform EGL_DEFAULT_DISPLAY belongs with the env var EGL_PLATFORM, but, according to Kristian, that method is deprecated. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
