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From big-request specification:
"This extension defines a mechanism for extending the length
field beyond 16 bits. If the normal 16-bit length field of the protocol
request is zero, then an additional 32-bit field containing the actual
length (in 4-byte units) is inserted into the request, immediately
following the 16-bit length field."
Meaning that the request requires 4 additional bytes. This patch provides
a convenience API for calculating maximum request data size.
Besides fixing QTBUG-73044, it was also discovered that calculations
for xcb_image_put (in QXcbBackingStoreImage::flushPixmap) were wrong.
The code assumed that xcb_get_maximum_request_length() returns bytes,
but what it actually returns is length which is measured in four-byte
units. This means that we were sending 4x less bytes than allowed by
the protocol. Furthermore, use the actual 'stride' (bytes per line) value
when calculating rows_per_put. The new stride value was introduced
by 760b2929a3b268e2edf14a561329bdb78fbdc26e, but was not updated in
rows_per_put calculations.
Fixes: QTBUG-73044
Done-with: JiDe Zhang <zccrs@live.com>
Done-with: Mikhail Svetkin <mikhail.svetkin@qt.io>
Change-Id: I06beb6082da3e8bc78225a87603914e796fe5878
Reviewed-by: Błażej Szczygieł <spaz16@wp.pl>
Reviewed-by: JiDe Zhang <zccrs@live.com>
Reviewed-by: Mikhail Svetkin <mikhail.svetkin@qt.io>
Reviewed-by: Uli Schlachter <psychon@znc.in>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
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Fixes: QTBUG-72957
Change-Id: Ia698eef5dae4e2d35ca2e565fbdc23da40c83d8a
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>
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Its been available by default since at least libxcb 1.5, and in Qt 5.12
we have even increased the minimal required libxcb version to 1.9.
Having configure switches for extensions is a legacy from Qt 4. There
are still few exceptions in Qt5, where the reason is that we have to
support Linux distributions that don't ship recent enough libxcb.
Task-number: QTBUG-30939
Change-Id: I0a02d93b6411119ec018b0cb8fe5c63beeab62ee
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
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This patch amends d67214302f269242ae3d8d2b962fd91ec42c979e.
The issue was caused by mistakenly interchanging
m_hasXRender <-> m_hasXRandr. Also renamed
selectXRandrEvents() -> xrandrSelectEvents() to be more
consistent with xi2Select*() API. And moved the xrandrSelectEvents()
to QXcbConnection ctor for the same reason.
Fixes: QTBUG-71305
Change-Id: I26f9bac3ae1f997f53134eb97f3569fb6d3c13fe
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
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A basic base class that creates a connection and initializes
extensions. The goal was to reduce the size of qxcbconnection.h/cpp.
Made QXcbAtom into a class that handles atom initialization and
exposes the relevant APIs. Before this patch, all of that logic
was inside of qxcbconnection.h/cpp.
Change-Id: Ia893c3b31e2343dfbe62fe2aa6bfd0017abf46ea
Reviewed-by: Gatis Paeglis <gatis.paeglis@qt.io>
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