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To support easy buffer exchange at glamor layer, glamor
added a new API glamor_egl_exchange_buffers() to exchange
two pixmaps' EGL image and fbos and textures without
recreating any of them. But this simple method's requirement
is that there are two pixmaps. A exceptional case is:
If we are using triple buffer when do page flipping, we
will have an extra back_buffer which doesn't have a pixmap
attached to it. Then each time we set that buffer to a
pixmap, we will have to call the create_egl_textured_pixmap
to create the corresponding EGL image and fbo and texture
for it. This is not efficient.
To fix this issue, this commit introduces a new back_pixmap
to intel structure to hold the back buffer and corresponding
glamor resources. Then we will just need to do the light
weight buffer exchanging at both DDX and glamor layer.
As the new back pixmap is similar to the screen pixmap
and need to be handled carefully when close screen. As the
glamor data structure is a per screen data, and will be
released at its close screen method. The glamor's close
screen method must cleanup the screen pixmap and back
pixmap's glamor resources. screen pixmap is easy to get,
but there is no good way to store the back pixmap.
So the glamor add a new API glamor_egl_create_textured_screen_ext
function to pass the back pixmap's pointer to glamor layer.
This commit make us depend on glamor commit: 4e58c4f.
And we increased the required glamor version from 0.3.0 to 0.3.1
Signed-off-by: Zhigang Gong <zhigang.gong@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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Signed-off-by: Zhigang Gong <zhigang.gong@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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If we failed to create textured pixmap from BO's handle, we
turn to create a new glamor pixmap by call glamor_create_pixmap
rather than fallback to in-memory pixmap. Have to introduce
a new wrapper function intel_glamor_create_pixmap.
Signed-off-by: Zhigang Gong <zhigang.gong@linux.intel.com>
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Added one configuration option --enable-glamor to control
whether use glamor. Added one new file intel_glamor.c to
wrap glamor egl API for intel driver's usage.
This commit doesn't really change the driver's control path.
It just adds necessary files for glamor and change some
configuration.
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Signed-off-by: Zhigang Gong <zhigang.gong@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
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