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When doing copy swapbuffers using drm, throttle on outstanding copy operations.
Introduces a new environment variable, EGL_THROTTLE_FENCES that the
user can use to indicate the desired number of outstanding swapbuffers, or
disable throttling using EGL_THROTTLE_FENCES=0.
This can and perhaps should be extended to the pageflip case as well, since
with some hardware pageflips can be pipelined. In case the pageflip syncs, the
throttle operation will be a no-op anyway.
Update copyright notices.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
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Use the pageflip ioctl when available.
Otherwise, or when the backbuffer contents need to be preserved,
fall back to a copy operation.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
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This makes it usable also for native helpers.
Also add inline functions to access the context and to
uninit the native display structure.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
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We try to load a DRI driver if this fails so don't confuse users.
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The idea is to be able to match a driver using the following order
try egl_gallium with hw renderer
try egl_dri2
try egl_gallium with sw renderer
try egl_glx
given the module list
egl_gallium
egl_dri2
egl_glx
For that, UseFallback initialization option is added. The module list
is matched twice: with the option unset and with the option set. In the
first pass, egl_gallium skips its sw renderer and egl_glx rejects to
initialize since UseFallback is not set. In the second pass,
egl_gallium skips its hw renderer and egl_dri2 rejects to initialize
since UseFallback is set. The process stops at the first driver that
initializes the display.
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native_display_buffer is just a wrapper to resource_{from,get}_handle
for drm backend.
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They are deprecated by native_surface::present and there is no user of
them.
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The callback presents the given attachment to the native engine. It
allows the swap behavior and interval to be controlled. It will replace
native_surface::flush_frontbuffer and native_surface::swap_buffers
shortly.
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Define the unit to match _EGLMode's.
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s/kms/drm/, s/kdpy/drmdpy/, and so forth.
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The main use of the backend is to support EGL_MESA_drm_display. drm
should be a better name.
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