On 12/23/2011 07:20 AM, Jose Fonseca wrote:
----- Original Message -----
Hi list,
Multiple driver support in EGL is hard to get right, if not
impossible.
On Linux desktop, we almost always want to use egl_dri2. It allows
EGL
to loads DRI2 drivers, thus allowing it to share DRI2 drivers with
libGL.
In one case where the app wants to use OpenVG, libEGL needs to load
egl_gallium instead. The problem comes from that we cannot know that
an
OpenVG context is to be created until it is created. But before a
context can be created, EGL needs to be initialized and an EGLConfig
needs to be chosen. So when EGL is to be initialized, we need to
load
and initilaize all EGL drivers. When an EGLConfig is to be picked,
we
need to pick it from all drivers.
Couldn't we restructure this such that OpenVG (and all other state
trackers on Linux) still use a dri2 driver, but one which exposes an
additional (gallium specific) interface?
I was going to suggest something similar. I think we want fewer EGL
backends to test and maintain, not more. Right?
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