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In vwm it was only necessary to relatively increase/decrease the sample
rate.
With vmon being primarily a cli tool, explicit setting of the rate is
desirable. This commit reworks things a little de-specializing the zero
value of overlays->sampling_interval, while switching this to instead of
being an index into the intervals table simply contain the float interval
itself. The math.h INFINITY macro becomes the new paused/zero value, and
simply gets an entry of its own in the intervals table as the lowest one.
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In vwm we were always doing a transparent overlay to preserve underlying
window visibility. With vmon this is undesirable and we just want to
copy the currently cached composited contents to the window, which is
also substantially less costly to perform.
Parameterize the operation so vwm and vmon can specify what's appropriate.
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I'm no longer fond of combining one-line conditional statements on
the same line as their conditional expression.
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- Move vmon_proc_t under vwm_overlay_t.
- Privatize vwm_overlay_t.
- Update xwindow.c to dynamically create and destroy overlays.
- Cease supplying vwm_t to vwm_overlays_create(), now just
pass in the bare vwm_xserver_t.
- Update all vwm_overlay_* functions to operate on vwm_overlays_t and
vwm_overlay_t. Only vwm_overlays_create() receives the xserver,
which it then embeds within the returned vwm_overlay_t.
- Eliminate _xwin_ flavors of overlay functions, largely mechanical
rename eliminating the _xwin_ from the names during the previous
pass of switching from vwm_t & vwm_xwindow_t to vwm_overlays_t &
vwm_overlay_t parameters.
- Change vwm_overlay_compose() to store damage in supplied pointer,
the caller is expected to make use of the damage information now
because the overlay code doesn't know about the window its coordinate
space.
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Introduce vwm_overlays_t and create/destroy functions, use in vwm_startup()
and vwm_shutdown(). Supply to methods operating on the global overlays
state vwm_overlays_update(), vwm_overlays_rate_increase(),
vwm_overlays_rate_decrease().
This is a fairly minimal adoption of these changes with vwm_t still being
supplyed to the overlay functions.
A future commit will further cleanup the interactions and cease all
knowledge of vwm_t in overlays.c, but for now everything overlay-oriented
still accesses the overlays_t instance via vwm_t. Instead of supplying the
vwm_t to vwm_overlays_create() the bare vwm_xserver_t will be supplied, as
this is the future shared component across vmon and vwm (in addition to
overlays).
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In preparation for vwm_overlays_* encapsulation of overlay global state
and general cleanup therein.
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