The glColorMask call was troublesome. In addition, the Qt::WA_TranslucentBackground
was misinterpreted and recommended misleadingly in the documentation. The hellogl2
example's --transparent argument was disfunctional in practice.
Replace glColorMask with glBlendFuncSeparate. The hellogl2 example and the docs are
now corrected wrt enabling semi-transparency in a QOpenGLWidget that is not a top-level
(which is the most common case).
Task-number: QTBUG-47276
Change-Id: I6f40e732d455f5efcf158649ac9a52ff9f240e85
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@theqtcompany.com>
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>
Add some extra rotations and offsets, to show off the power of
what you can do with a single draw call. Also use QGLWindow instead
of QGLWidget. This improves performance from 23 FPS to 30 FPS on a
4k monitor with integrated Intel graphics.
Change-Id: Iedac1c14cc6057959aa15faaacdf29da91f36ab1
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
Using the approach we already do for some GLES 3.0 functions we can provide a cross-platform,
cross-GL-GLES wrapper for ES 3.0 and 3.1 functions too.
Applications only have to take extra care about the version requests (context version
and version directives in shader code), the rest of their code can stay the same across
desktop/mobile/embedded, even when ES 3 functions are used.
The new functions are placed to a new subclass which is placed between QOpenGLFunctions
and the internal QOpenGLExtensions. This is necessary because, unlike with QOpenGLFunctions,
there is no guarantee that these functions are always available in all configurations.
When running on desktop OpenGL, we resolve as usual. If the OpenGL version contains the
function in question, either in core or as an extension, it will all just work. This is
handy because it does not rely on 4.x extensions like GL_ARB_ESx_compatibility, and so
ES 3.0 functions will be functional on OpenGL 3.x systems too by just setting a 3.x version
number in the QSurfaceFormat.
We will no longer qFatal on broken systems where the driver returns a 3.0 or 3.1 context without
the corresponding functions present. Instead, we show a warning and gracefully fall back to
resolving as usual, via eglGetProcAddress or similar. For functions that are available in ES2 as
an extension this may just work fine.
Added also an example that runs identically both with OpenGL and OpenGL ES 3 and utilizes some
ES 3.0 features like instanced drawing.
[ChangeLog] Added QOpenGLExtraFunctions providing OpenGL ES 3.0 and 3.1 function wrappers in
a cross-platform manner.
Task-number: QTBUG-46161
Change-Id: I9f929eb61946c35c415b178c4d6ab2c1c958684e
Reviewed-by: Paul Olav Tvete <paul.tvete@theqtcompany.com>
The Hello GL2 Example was using the older Signal/Slot syntax that made
use of the macros `SIGNAL()` and `SLOT()`. I changed it to the newer
one.
Change-Id: I8e55015383847a04b07f751fe9fc94b81956a896
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
Introduce support for the widgets' clipRect(). Right now render-to-texture widgets
in scroll areas placed close to each other result in broken (non-existent) clipping.
Similarly, stack-on-top widgets fail to clip when placed inside a scroll area.
This is now corrected and the qopenglwidget example is enhanced to utilize a scroll
area.
Task-number: QTBUG-45860
Change-Id: I859a63d61a50d64ba9e87244f83c5969dce12337
Reviewed-by: Jørgen Lind <jorgen.lind@theqtcompany.com>
Add dynamic GL and remove warning about ANGLE since that
package no longer exists.
Task-number: QTBUG-46103
Change-Id: Icf93d1105434395a3c9ad61bb8c921fcedfc7137
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
Fix Library not loaded/image not found error on application
startup.
With @rpath enabled (commit 6e18f57a) qmake now requires
a correct target.path in order to emit correct -rpath @loader_path
linker directives.
Change-Id: Ia32b038ad2d64819477be5cd9d1ed36768e2251b
Reviewed-by: Jake Petroules <jake.petroules@petroules.com>
Qt copyrights are now in The Qt Company, so we could update the source
code headers accordingly. In the same go we should also fix the links to
point to qt.io.
Outdated header.LGPL removed (use header.LGPL21 instead)
Old header.LGPL3 renamed to header.LGPL3-COMM to match actual licensing
combination. New header.LGPL-COMM taken in the use file which were
using old header.LGPL3 (src/plugins/platforms/android/extract.cpp)
Added new header.LGPL3 containing Commercial + LGPLv3 + GPLv2 license
combination
Change-Id: I6f49b819a8a20cc4f88b794a8f6726d975e8ffbe
Reviewed-by: Matti Paaso <matti.paaso@theqtcompany.com>
Also make the fragment shader a bit simpler
Change-Id: Ie50940da0a4f896504c9f5962cdb6c455983302f
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
This patch replaces the old Qt logo with the new, flatter one.
The PNGs were optimized via: optipng -o7 -strip "all"
Task-number: QTBUG-41685
Change-Id: I51983a45144373bf7aee31a32990ecbb2582f488
Reviewed-by: Robert Loehning <robert.loehning@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Kai Koehne <kai.koehne@theqtcompany.com>
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Platforms like eglfs allow a single window per screen. Thus the behavior of
--multiple is not suitable since it tries to open multiple windows on the
primary screen. Instead, introduce --multiscreen.
Add also --timeout to quit the app after 10 seconds. This is essential on
platforms that do not have windows with decorations that can be used to
close windows.
With eglfs' kms/drm hooks, starting with --multiscreen will now show a
rotating logo on all connected displays, with some random background color.
Change-Id: I53f2651f05620e752c289038a9b3ff4508273173
Reviewed-by: Louai Al-Khanji <louai.al-khanji@digia.com>
Reviewed-by: Andy Nichols <andy.nichols@digia.com>
Retrieve vendor/renderer name similar to context info
and exclude renderers that do not support threaded
Open GL (ANGLE/noveau).
Change-Id: I690c2fc277538bf28bf1f6032c2e017ede15e434
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Trying to be smart and minimizing the amount of GL calls per frame
to provide a good example was a mistake (in a way): There are
components, like the eglfs mouse cursor, that change the context state.
To make sure the example work in these cases, set the state upon
each frame.
Change-Id: Ief1fd7bbb0fb1955a64dac97a071b7a3d9d506d4
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
Like in all other places. This way the resulting QMenu is correctly
parented so it will show up at the proper position even on platforms
which do not have a way to position top-level windows.
Task-number: QTBUG-29025
Change-Id: I2aa6fe73699379029c44a3f379366a2133753190
Reviewed-by: Robin Burchell <robin.burchell@viroteck.net>
Use showMaximized(). Just calling show() without setting a size can result
in a zero-sized, invisible window on some platforms.
Change-Id: Ifa48258060e3d651c2fac3a1409a26a2c3db6bdb
Reviewed-by: Robin Burchell <robin.burchell@viroteck.net>
On systems that give alpha configs by default writing alpha values of
less than 1.0 is a bad idea since it will lead to the content behind the
window becoming visible, even though this is not the example's intention.
Change-Id: I23cdfc1fb78d77b1cbc192d2aba5d6665a7acfcc
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
While we will cover the entire surface with our textured quads, the clear
is still necessary in order to make top-levels with TranslucentBackground
render correctly: We don't want to blend transparent areas with undefined
content that is in the surface's framebuffer.
Blending is problematic for alpha values. We now prevent the blended alpha
from being written out. This ensures that in examples like qquickviewcomparison,
where the backingstore image contains an alpha of 0.5 while the QQuickWidget
texture 1.0, the result is still an alpha value of 1.0 in the final image.
Writing out an alpha of 0.5 would break on systems where windows get an alpha
buffer by default.
hellogl2 can now take a --transparent parameter which makes the QOpenGLWidget
being cleared to transparent in order to verify it works in combination
with Qt::WA_TranslucentBackground.
The swapped red and blue problem is also corrected. RGBA8888 does not need
swizzling. The only format that needs this is RGB32.
Task-number: QTBUG-40716
Change-Id: I54a9fd3a91a1b59575b38cdb908835315514e40f
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
Change them to use QOpenGLWidget and QOpenGLTexture.
Advocate also the usage of VBOs.
Hopeless examples, that rely on the fixed pipeline and will
not compile or work in ES and dynamic builds, are moved to
a "legacy" directory. The documentation pages for these are
removed. This long due change avoids the confusion newcomers
experience when trying to get started with Qt 5 and OpenGL.
hellowindow's behavior is changed to open a single window only
by default. The old default behavior, that opened three windows
on platforms that supported both MultipleWindows & ThreadedOpenGL,
can be requested by passing --multiple. --single is removed since it
is the default now. This plays much nicer with drivers that have
issues with threading.
In addition, say hello to hellogl2.
This is the old hellogl example updated to use QOpenGLWidget and
OpenGL 2. It also has a mainwindow with multiple (un)dockable widgets
containing the OpenGL widgets. This helps testing the behavior when
the top-level of the QOpenGLWidget changes and provides a very
important example of how to do proper resource management in this case.
(must use aboutToBeDestroyed() of the context, since the context goes
away and is replaced by a new one on every dock/undock)
As a bonus, the logo is now real 3D, no more orthographic nonsense.
Launch with --multisample to request 4x MSAA.
Launch with --coreprofile to request 3.2 Core. In this particular example
the shaders are present in both versions and there is a VAO so the application
is functional with core profile contexts.
Change-Id: Id780a80cb0708ef164cc172450ed74050f065596
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
1. Use includes without module prefixes, as is the custom in examples.
2. No inline functions to make it more readable.
3. Pause animation on pressing P and document our signal connection a bit more.
Change-Id: I68dc3d4c74b639cf3fec17b63b7f49626db58bdb
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
[ChangeLog] Added QOpenGLWindow. This serves as a convenience class for
creating windows showing OpenGL content via an API similar to QGLWidget
and without any widget dependencies.
Done-with: Jorgen Lind <jorgen.lind@digia.com>
Task-number: QTBUG-36899
Change-Id: I52e9bc61acb129dbfd3841b3adeffab2dbcf7f05
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
QOpenGLWidget is now public.
In addition Qt::WA_AlwaysStackOnTop is introduced to support the
special case of semi-transparent QOpenGLWidget or QQuickWidget on
top of regular widgets.
hellogl_es2 becomes the qopenglwidget example. This example performs
painting both via QPainter and native GL commands and has the OpenGL
widget combined with other, normal widgets.
The widget stack receives some changes when it comes to renderToTexture
widgets like QQuickWidget and QOpenGLWidget. Calling update() will now
result in a paint event, which is essential for QOpenGLWidget since we
want it to behave like a regular widget. The dirty region handling is
extended specially for such widgets due to performance reasons.
(an OpenGL content update must not result in any backingstore painting,
and is thus handled as a different kind of dirtiness)
[ChangeLog] Added QOpenGLWidget. This widget serves as a replacement for QGLWidget.
Task-number: QTBUG-36899
Task-number: QTBUG-40086
Change-Id: Ibf7f82fea99b39edfffd2fc088e7e0eadbca25cf
Reviewed-by: Paul Olav Tvete <paul.tvete@digia.com>
Q_DECL_OVERRIDE (which expands to 'override' for supported compiler)
helps to declare the intent (that it is an overridden function) and
force compilation error when there is no such virtual function in the
base class.
The examples should show the best practice of having it, as it may save
the programmer quite some time in case of change of API or typo in the
function name or arguments.
This change was done automatically with
clang-modernize -add-override -override-macros
And fixed MSVC compilation by removing inline for TorrentViewDelegate::paint
Change-Id: Ice66ae93fae571266f908703d5b8892b2c1ebb1a
Reviewed-by: Jędrzej Nowacki <jedrzej.nowacki@digia.com>
This is causing compilation errors on some Windows CE
configurations:
mainwidget.cpp(130) : error C3861: 'setlocale': identifier not found
mainwidget.cpp(149) : error C3861: 'setlocale': identifier not found
Change-Id: Ie863cd7c9c53cfef4074dabffe157d9068654a1c
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
No reason to restrict it to desktop only, the code works on ES2 too.
Task-number: QTBUG-35730
Change-Id: I915a88cbf3c95a941d6bafd88ed57fef0b6a25b9
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
Platforms like eglfs will not allow opening more than one OpenGL-based
window. To prevent aborting the hellowindow example when invoked without
--single, enhance the capability check to include also WindowManagement
in addition to ThreadedOpenGL.
Change-Id: I147d90b31d9fd94912c36339d36af3f311aaa874
Reviewed-by: Andy Nichols <andy.nichols@digia.com>
This introduces the ability to indirectly invoke all common GL1-GLES2
functions via QOpenGLFunctions. The GL1 functions are not yet resolved,
since this would not work anyway when linking to an OpenGL implementation
directly. However this may change later but that will be a completely
internal change without affecting any public APIs.
Also migrate some of the opengl examples to use QOpenGLFunctions for
everything. Once dynamic GL loading becomes available on some platforms,
these examples should continue to function without any changes since they
do not anymore invoke any OpenGL functions directly.
Task-number: QTBUG-36483
Change-Id: Ie630029651e5a4863a480aac5306edd67ee36813
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
Remove the opengl proxy for now. Later it will either be moved into
a separate library or replaced by a QOpenGLFunctions-based approach.
This means that the -opengl dynamic configuration is not usable
for the time being. The rest of the enablers remain in place.
The convenience function QOpenGLFunctions::isES() is now moved to
QOpenGLContext and is changed to check the renderable type. This is
extremely useful since besides supporting dynamic GL it solves also
the problem of GL_ARB_ES2_compatibility (i.e. it triggers the real ES
path when creating an ES-compatible context with a desktop OpenGL
implementation).
Task-number: QTBUG-36483
Task-number: QTBUG-37172
Change-Id: I045be3fc16e9043e1528cf48e6bf0903da4fa7ca
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
Besides serving as an example for performing OpenGL rendering inside
a window container in a way that it works across all GL versions,
this is an extremely useful tool for developers and users alike
since it allows quick and easy checking of what sort of context a
particular driver returns for a particular QSurfaceFormat.
NB! Depending on the OpenGL driver, some surprises can be expected.
The handling of core/compatibility profiles, the fwdcompat bit,
the supported GLSL versions, etc. tend to be somewhat different
across the different OpenGL implementations.
Task-number: QTBUG-37071
Change-Id: Iae4328e66cd0bb19f74a77fefef93ea5a3221e31
Reviewed-by: Jørgen Lind <jorgen.lind@digia.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
