The makeCurrent() call can fail if there is no underlying platform
window present anymore (due to close()).

Just continuing with the cleanup is wrong: There may be another context
current (from the application or from some other component of Qt) and
there are GL calls issued which would mess up the state in that context.
Therefore we ensure there's a context/surface by using a temporary
QOffscreenSurface.

Task-number: QTBUG-41942
Change-Id: I79f35a1f5bbe7a8a14943e8603764575ed119f93
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>

They would unconditionally call cleanupNodesOnShutdown on hide(), but
QQuickWindow::sceneGraphInvalidated would only be emitted if this was
the last window being hidden, leading to an inconsistent state in the
application.

Since the non-threaded render loops do not support releasing resources
(there is one OpenGL context and one QSGRenderContext shared between
all windows) we delay cleanup until the window is destroyed.

This change also make the render loops track the windows until they
are destroyed, similar to what the threaded one does. The purpose of
this is to, in the case of dangling windows, only trigger invalidation
of the scene graph when the last QQuickWindow is destroyed through
QSGRenderLoop::cleanup().

Task-number: QTBUG-41210
Change-Id: I7e12a4f726ebb3e7935c822b6046abb3590c583a
Reviewed-by: Ulf Hermann <ulf.hermann@digia.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

I've wanted this for a long time, but the animation system didn't
support it when mixed with timers/pauses. However, because of
dfc8f8b5d4a02f33c7f9063c2a28450902a9d863 and
0db3ea4048fe572a256deb343ea5e64a55d98de9 to qtbase, it is now
possible.

Change-Id: Ic70c181ce49eae90276bd4f22a2d299061f96087
Reviewed-by: Michael Brasser <michael.brasser@live.com>

Some features, like the memory profiler, create huge amounts of data.
Often enough, we're not actually interested in all the data available
from the profiler and collecting it all can lead to excessive memory
consumption. This change enables us to optionally turn various aspects
of QML profiling off.

Task-number: QTBUG-41118
Change-Id: I7bb223414e24eb903124ffa6e0896af6ce974e49
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>

- Renamed LICENSE.LGPL to LICENSE.LGPLv21
- Added LICENSE.LGPLv3 & LICENSE.GPLv2
- Removed LICENSE.GPL

Change-Id: I84a565e2e0caa3b76bf291a7d188a57a4b00e1b0
Reviewed-by: Jani Heikkinen <jani.heikkinen@digia.com>

The default remains OpenGLSurface.

Change-Id: I96b400b7aa9c2b0435ea0614598e1b1f32b6d6b2
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

Change-Id: I438c33a1dc83fd0cd1ec08bb4e4a1257a3216ca2
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

windowDestroyed() triggers a sendPostedEvent(DeferredDelete) to
cleanup GL resources. If the window was deleted through deleteLater()
it will also be deleted at this point.

Change-Id: I3b0cc0f36c4a543c5fbaa4af107dc4aa0c8b6725
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>

The swap time was treated as absolute by the qCDebug output, but was
actually relative.

Change-Id: Ia1539b8f8305ca37430022803419eb12a05934cb
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>

Previously the polish timings were collected incorrectly from the
windows render loop and not at all from the basic render loop. By
collecting the polish times at the right places we can get rid of
the 2-argument profile macro as well.

Task-number: QTBUG-39876
Change-Id: I0b4aaf87162c652b8dcea6cd4f54db053f8312fe
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>

Change-Id: I865ee838b0fd6c257b7189f24130012b98206fd1
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>

Instead of sending multiple touch updates per frame, we
store the last one and flush the pending events just before
we enter into the scene graph sync phase.

[ChangeLog][QtQuick] QQuickWindow will compresses touch events
and delivers at most one touch event per frame.

Done-with: Robin Burchell <robin.burchell@jollamobile.com>
Change-Id: Ia0169bc4a3f0da67709b91ca65c326934b55d372
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>

Task-number: QTBUG-38564
Change-Id: Ice1170339f7d650fcb6accfccf325471629343d6
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

This removes QSGContext::sharedOpenGLContext and replace its uses
with QOpenGLContextPrivate::globalShareContext, which is also going
to be used by QOpenGLWidget and QQuickWidget.

Change-Id: I1e296c3e6832f717caaf31ba7d7b27c06249219b
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

Doing it on 'aboutToQuit' meant we would clean it up whenever an
application ran QCoreApp::exec() which could be multiple times
per application run.

Change-Id: I59e06398a551ae7979e3832dff811937037fa106
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>

Multiply by window->devicePixelRatio() at all
qt_gl_read_framebuffer() call sites.

Task-number: QTBUG-35962
Change-Id: If58e4f97fc5d931ba2e222f8cb1a0641d52c3257
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>

The cleanup() function would deregister the render loop from all
windows the render loop had seen, but the render loop doesn't see
windows until the window gets a showEvent and for some implementations
it was removed as a result of hideEvent. So add explicit tracking to
QSGRenderLoop which is managed by QQuickWindow's constructor and
destructor. With this, we no longer need the lists from the
subclasses, so these functions are removed again.

Change-Id: I05e5507ad57e23c80bacd99752654cc7d0890dc1
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>

This does in the QSGGuiThreadRenderLoop what 403045a5

 did for the
QSGThreadedRenderLoop. Fix a memory corruption in Mesa's dri2 EGL
when setting a window current after deleting the previous current
one.

Change-Id: I8df0bacdf12f71e969a9ea39842a402c9a2a303f
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>

e13547c5

 used a global static to clean
up QSGRenderLoop which is triggered very late, potentially after
SG backend API plugins have been unloaded. This results in crashes
when used in combination with scenegraph-playgrounds's customcontext.

Partially revert the change and instead clean up at the time of
QApp::aboutToQuit and make sure we also disconnect cleanly from
all QQuickWindows.

This change also ensures that QSGRenderLoop::windowDestroyed() gets
called for all QQuickWindows registered with the render loop. This
ensures that rendering stops and that scene graph nodes and resources
will be cleaned up regardless of whether the application has
remembered to delete the window or not. This is a good thing as it
makes the scene graph shutdown a bit cleaner.

Change-Id: I9cb9093979f8eac05542f118a6ff9cfe5c84f745
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>

Add QQuickWidget::sceneGraphError() equivalent to
QQuickWindow::sceneGraphError(), move message formatting code
to QQuickWindowPrivate.

Change-Id: I18cd4d7e0f6ee1011c29375218dc6a044b0d2cf2
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

The error signal patch added some usages of QOpenGLFunctions::isES().
These need to be temporarily removed.

Change-Id: Ibd1d8094059020708aefe4b3502ba56d624928b3
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>

Also marked the new afterAnimation() signal as \since 5.3 and
introduced proper revisioning on the new signals.

[Changelog][QtQuick] Added QQuickWindow::afterSynchronizing(),
openglContextCreated(), sceneGraphAboutToStop(). Useful for
deeper integration with the rendering.

Change-Id: I5532b310506c2432325595e55ef9307b8934abee
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

The assert before test not if the scoped pointer is null but the pointer
which was holding the scoping pointer.

Task-number: QTBUG-36932
Change-Id: I7a5e51752446556c1796bb677fe69cbceffdd3e0
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>

When nothing is connected to this signal, an error will be printed or,
in case of Windows, a message box will be shown. If there is something
connected, it is up to the application to handle the error.

[ChangeLog] Added a new sceneGraphError() signal to QQuickWindow
which applications can use to detect errors like OpenGL context creation
failures and react in their own custom ways.

Task-number: QTBUG-36138
Change-Id: I33b1e5e0e3f25872af67c5bb5ae937e3470b25f3
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>

[ChangeLog] QQuickWindow will now emit the afterAnimating() signal
from the gui thread before each scenegraph sync request.

Change-Id: I4897c82f75066238e781455d4fce4fb6bbe2558e
Reviewed-by: Pasi Keränen <pasi.keranen@digia.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

The QtQuick parts of the QML profiler service thus become a proper
global profiler which can be independently enabled and disabled.

Change-Id: Ifad03801cab2be66a264fc46fdebdae582fcc99b
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

Without this change, it is not possible to implement a custom context
without also implementing a renderloop.

Change-Id: Iac2aa732251cdf7221b28f665394cdd336a3d846
Reviewed-by: Michael Brasser <michael.brasser@live.com>

s_instance is created with new and never deleted which causes several
destructors to never be called.

Task-number: QTBUG-35731
Change-Id: Icccb19186958f8bb74c5fd2b4b41165255debc46
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>

Allow multiple detailTypes in each packet and extend the profiling code
to make use of that. Note that this changes the usual order of
pixmapSizeKnown and PixmapLoadingFinished events. As far as I can see
this doesn't affect the QML profiler frontend and the order of these
events isn't specified anywhere.

Change-Id: Id39ad98594ccf35add4415e08daf9e92ab561237
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>

Don't needlessly duplicate information about the profiler being available
and allow inlining. Use macros to check availability of the profiler
in calling code and generally simplify the code.

Task-number: QTBUG-35315
Change-Id: I0a9daec4a95f74b9db795ef2918a01fb772ea107
Reviewed-by: Michael Brasser <michael.brasser@live.com>
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

If another GL context is bound to another surface on the GUI
thread, we can run into issues while cleaning up the SG nodes.

Task-number: QTBUG-34898
Change-Id: Ifa02b7cdbc7ab38b3a149a21452cc5071498a7d1
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

Task-number: QTBUG-33363
(cherry-picked from commit 12eab916

)

Change-Id: Ia2b0c329157786cb4ec703989f12d2fdb1ce6bc8
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

Add an exhaust delay to QSGGuiThreadRenderLoop. Some updates
may be done with posted events, and maybeUpdate event competed
with those, leading to partial updates and frames drawn twice.

Change-Id: I532bff692c597eeba5bbd6def89ae68c80fdd69b
Done-with: Mikko Harju <mikko.harju@jollamobile.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>

Task-number: QTBUG-33363

Change-Id: Ia2b0c329157786cb4ec703989f12d2fdb1ce6bc8
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

Task-number: QTBUG-34806
Change-Id: I5013baaff0ca86357292474976944c1a3056f219
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>

Change-Id: I12bc0bc475b3e99185aefcd58eef5a0fb5e9852e
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>

This API is primarily a hook which is needed by the Qt WebEngine to
set up sharing with the scene graph's OpenGL contexts.

Change-Id: I5bb03abd9ab99f502db8e413fe838a8b30365b8d
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

See the task for the full reasoning behind this patch.

The threaded renderloop has been refactored to have one window per
thread. This is mostly a simplification of the current code path where
for loops over multiple windows are turned into if (window).

The QSGContext has been split into two classes, QSGRenderContext
for which there is one per OpenGLContext.

The rest of the patch is name changes and a couple of cleanups
in the hopes of simplifying this change.

Task-number: QTBUG-33993

Change-Id: I31c81f9694d7da7474a72333169be38de62613c4
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

Change-Id: I3750c47640bf21c3567c5fa1c4667e3e2552942e
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

Change-Id: Icd612b243cdfe1248d1b94964c53f5102f9558d2
Reviewed-by: Gunnar Sletta <gunnar.sletta@digia.com>