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When there is no user driver or any matching display drivers we fall
back to the default driver. This patch lets us have a list of default
drivers instead of just one. The drivers are loaded in turn and we
attempt to initialize the display. If it fails we unload the driver
and move on to the next one.
Compared to the display driver mechanism, this avoids loading a number
of drivers and then only using one. Also, we call Initialize to see
if the driver will work instead of relying on Probe. To know for sure
that a driver will work, Probe really have to do a full Initialize, so
we will just use Initialize directly.
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The function can be used by a driver to check each search path of EGL.
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Put a note that the macros define functions and should not be ended with
a semicolon when used.
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There are standard typecast functions that are common to most drivers.
They are used to typecast, for example, an _EGLSurface to a
driver-defined type.
This commits define _EGL_DRIVER_STANDARD_TYPECASTS and
_EGL_DRIVER_TYPECAST that should hopefully save some typings for driver
writers.
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Mainly to remove eglcurrent.h and egldisplay.h from eglglobals.h.
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_eglCloseDriver is no-op and _eglOpenDriver does nothing but call
_eglMatchDriver. Export _eglMatchDriver directly.
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This function is not used and should have been removed by last commit.
My mistake.
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In current design, multiple drivers will probe the same display and the
best driver is determined. The cache can be used by the drivers to
store and share the probed data.
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Make drv->Probe return a score so that the matching can be done by
finding the driver with the highest score.
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Remove _eglPreloadDriver, _eglLookupDriver, and _eglSplitDisplayString.
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It can be used to load the user driver specified by EGL_DRIVER, or a set
of drivers specified by EGL_DISPLAY, or the default driver, and in that
order.
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Mark EGL API and driver functions as PUBLIC.
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
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libX11 is used to determine the screen number, which is in turned used
to determine the DRI driver. However, the sysfs interface for
determining the DRI driver is gone, and no working driver depends on
this mechanism.
Display string parsing is moved to a new function,
_eglSplitDisplayString.
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
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Move some fields of _EGLDriver to _EGLDisplay. It also becomes
unnecessary to pass _EGLDisplay to drivers when _eglMain is called.
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
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Driver is chosen and preloaded when eglGetDisplay is called. Later when
eglInitialize is called, the same driver is matched to initialize the
display. Also, add new, but unused, hooks to EGLDriver to allow a
driver to probe a display or unload itself.
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
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The motivation is so that drivers do not need to look up and check for
bad display, context, and etc. It also becomes unnecessary for drivers
to call the link functions.
This commit makes eglapi.[ch] do the lookup and check. As a result, the
driver API is overhauled, and almost all sources and drivers need
update. The updates are mainly find and replace with human brains.
Signed-off-by: Chia-I Wu <olvaffe@gmail.com>
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The idea is to pass the call down to the device driver where an API-specific
query can be made. Untested.
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through EGL_VERSION string
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Seems to be mostly working. Not all of egl API is implemented.
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