Qt Quick

Tuukka Turunen

Performance Improvements with Qt 5.9 LTS

Published Wednesday May 31st, 2017 | 10 Comments on Performance Improvements with Qt 5.9 LTS
Posted in Biz Circuit & Dev Loop, Boot time, Embedded, Graphics, Qt, Qt Quick, Releases

Qt 5.9 LTS improves Qt Quick and QML performance significantly, especially with Linux on ARM. We have worked hard to improve the performance in multiple areas: within the QML engine, Qt Quick graphics, QML Compiler and in the Qt Quick Controls, to name some examples. Performance has improved significantly across all areas, with some items […]

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Thomas Hartmann

Qt Quick Designer in Qt Creator 4.3

Published Wednesday May 24th, 2017 | 1 Comment on Qt Quick Designer in Qt Creator 4.3
Posted in Declarative UI, Qt Quick, Qt Quick 2, Qt Quick 2.0, Qt Quick Controls, QtCreator, Styles | Tags: , , ,

For Qt Creator 4.3 we added many new features to the Qt Quick Designer. Integrated text editor The most obvious addition is an integrated text editor in the Design mode that also allows editing the QML code side by side with the form editor as a preview. Besides being able to edit QML code while […]

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Laszlo Agocs

Qt from git on the Tinkerboard (with Wayland)

Published Wednesday May 3rd, 2017 | 6 Comments on Qt from git on the Tinkerboard (with Wayland)
Posted in Dev Loop, Embedded, Graphics, OpenGL, QPA, Qt Quick

The Asus Tinkerboard is a nice little board for Embedded Linux (or Android, for that matter), based on the Rockchip RK3288 SoC including a quad-core ARM Cortex-A17 CPU and a Mali-T760 MP4 (T764) GPU. Besides being quite powerful, it has the advantage of being available locally in many countries, avoiding the need to import the […]

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Andy Nichols (nezticle)

Getting more out of Qt Quick with OpenVG

Published Friday March 31st, 2017 | 4 Comments on Getting more out of Qt Quick with OpenVG
Posted in Declarative UI, Dev Loop, Embedded, Graphics, Qt Quick

In Qt 5.9 is now possible to render Qt Quick applications with OpenVG when using hardware that supports it. This is made possible by a new scene graph adaptation that uses EGL and OpenVG to render Qt Quick scenes.  When using Qt for Device Creation, it means that it now be possible to run with graphics hardware […]

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Laszlo Agocs

Boosting performance with shader binary caching in Qt 5.9

Published Thursday March 23rd, 2017 | 3 Comments on Boosting performance with shader binary caching in Qt 5.9
Posted in Dev Loop, Graphics, OpenGL, Painting, Qt Quick

Now that Qt 5.9 is getting closer, let’s take a look at a minor but immensely useful improvement to the basic OpenGL enablers that form the foundation of Qt Quick and the optional OpenGL-based rendering path of QPainter. Those looking at the documentation snapshots for 5.9 may have already come across some new functions in […]

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Andy Nichols (nezticle)

Making Movies with QML

Published Tuesday February 21st, 2017 | 10 Comments on Making Movies with QML
Posted in Dev Loop, Graphics, Qt Quick

One of the interesting things about working with Qt is seeing all the unexpected ways our users use the APIs we create.  Last year I got a bug report requesting an API to set a custom frame rate for QML animations when using QQuickRenderControl.  The reason was that the user was using QQuickRenderControl as an engine to […]

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Laszlo Agocs

Inside QImage (with a touch of Qt Quick and OpenGL)

Published Friday January 20th, 2017 | 4 Comments on Inside QImage (with a touch of Qt Quick and OpenGL)
Posted in C++, Dev Loop, Graphics, OpenGL, Painting, Qt Quick | Tags: ,

QImage is the most common container for image data in Qt applications. Getting a QImage that contains the pixel data of an image loaded from a file is fairly self-explanatory: QImage img; img.load(“some_image.png”); This can then be used with QPainter, can be passed to widgets, and can also be utilized in Qt Quick scenes via […]

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Laszlo Agocs

Which OpenGL implementation is my Qt Quick app using today?

Published Wednesday January 18th, 2017 | 4 Comments on Which OpenGL implementation is my Qt Quick app using today?
Posted in Declarative UI, Dev Loop, Embedded, Graphics, Performance, Qt Quick

Qt Quick-based user interfaces have traditionally been requiring OpenGL, quite unsurprisingly, since the foundation of it all, the Qt Quick 2 scenegraph, is designed exclusively with OpenGL ES 2.0 (the top of the line for mobile/embedded at the time) in mind. As you may have heard, the graphics API story is a bit more inclusive […]

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Laszlo Agocs

Qt on the NVIDIA Jetson TX1 – Device Creation Style

Published Thursday November 10th, 2016 | 4 Comments on Qt on the NVIDIA Jetson TX1 – Device Creation Style
Posted in Dev Loop, Embedded, OpenGL, QPA, Qt, Qt Quick

NVIDIA’s Jetson line of development platforms is not new to Qt; a while ago we already talked about how to utilize OpenGL and CUDA in Qt applications on the Jetson TK1. Since then, most of Qt’s focus has been on the bigger brothers, namely the automotive-oriented DRIVE CX and PX systems. However, this does not […]

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