These hints allow an acceleration architecture to optimize allocation of certain
types of pixmaps, such as pixmaps that will serve as backing pixmaps for
redirected windows.
This reverts commit 1365aeff54.
It defeated the optimization for drivers that don't provide a CreatePixmap
hook. The optimization makes no sense for drivers that do anyway, so disable
it for them completely.
This adds hooks for the driver to access Create/DestroyPixmap and ModifyPixmapHe
ader.
It allocates a 0 sized pixmap using fb and calls the driver routine to do
work of allocating the actual memory.
ModifyPixmapHeader is mainly required for hooking the screen pixmap which
isn't create by normal methods
Not sure what I was thinking when I wrote this... it would cause the box
coordinates to be off for exaCopyNtoNTwoDir or fallbacks.
Thanks to Tilman Sauerbeck for pointing out the problem on IRC and testing the
fix.
If the driver isn't compatible to the server, all bets are off anyway wrt
the contents of the fields that we're validating, which can lead to bogus
error messages.
This was an attempt to avoid scratch gc creation and validation for paintwin
because that was expensive. This is not the case in current servers, and the
danger of failure to implement it correctly (as seen in all previous
implementations) is high enough to justify removing it. No performance
difference detected with x11perf -create -move -resize -circulate on Xvfb.
Leave the screen hooks for PaintWindow* in for now to avoid ABI change.
Improve exaShmPutImage performance and reuse its core in exaPutImage as it
seems faster than the previous code when the driver doesn't provide an
UploadToScreen hook.
Make sure all damage records are notified of the damage incurred by actual
ShmPutImage calls.
Remove superfluous manual damage tracking for actual PutImage calls.
Exclude bits that will be overwritten from migration.
Use exaGlyphs even when Composite can't be accelerated, to avoid PolyFillRect
roundtrip via offscreen memory.
Initialize mask pixmap in exaGlyphs in FB in addition to system if the driver
provides Composite hooks to avoid migration overhead.
Remove manual damage tracking where superfluous.
Initialize system and FB copy in exaFillRegionSolid and adapt
exaGetPixmapFirstPixel to the new migration infrastructure.
This should mostly eliminate migration overhead for these, whether they are
used for acceleration or fallbacks.
As we can't actually accelerate anything interesting here, just migrate out
once and call fbSolidBoxClipped instead of taking a round trip via offscreen
memory with exaSolidBoxClipped.
Reuse pending damage region for extents and to prevent any actual migration of
pixmap contents when we're overwriting the whole pending damage region.
Remove superfluous manual damage tracking.
Only migrate once in exaTrapezoids/Triangles instead of every time in
exaRasterizeTrapezoid/AddTriangles. Adapt manual damage tracking to new
infrastructure.
Also move definition of NeedsComponent() closer to where it's used.
We finally want to catch all cases where the pixmap pointer is dereferenced
outside of exaPrepare/FinishAccess.
Also fix a couple of such cases exposed by this change.
The initiator of migration can pass in a region that defines the relevant area
of each source pixmap or the irrelevant area of the destination pixmap. By
default, the pending damage region is assumed relevant for the destination
pixmap, and everything for source pixmaps.
Thanks to Jarno Manninen for reassuring me that my own ideas for this were
feasible and for providing additional ideas.
