02.06.2016 
Anaheim, California 2016-07-24 2016-07-28 Anaheim, July 24th – 28th Meet us at the biggest graphics event in the world: SIGGRAPH2016! KDAB will be there and KDAB’s Dr Sean Harmer will be delivering a talk on Qt 3D.
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Very explicit operator bool Is the Safe Bool Idiom still useful in C++11 / C++14?
From time to time I scroll through Qt-related forums and mailing lists, and whenever possible I try to help fellow developers out. The other day a StackOverflow thread caught my attention: a developer was asking “What is the purpose of operator RestrictedBool in QScopedPointer?” Indeed, looking at QScopedPointer‘s implementation, one notices the strange RestrictedBool usage. […]
Faster than Fast String Search in Qt
Is your code burning a lot of cycles hunting for strings? Maybe you need to find the proper charset nestled in a chunk of HTML, or look for the dimensions in an XPM image file, or locate the email attachment boundaries in a block of MIME. If you string search a lot and performance is […]
Qt on Android: How to use Android Toast
To get you started on this, we’ll be using KDAB’s Android utils with the humble Toast. Toasts are small popups which are used to show the user some feedback. Check Google’s API guide for more info about toasts. The easiest way to show a toast is to use Toast.makeText(Context context, CharSequence text, int duration) static […]
QRegion will be iterable in Qt 5.8 - seamless integration with C++11 range-for
A novel solution to an old problem The QRegion class specifies a clip region for a painter. You can also query a QPaintEvent for the region() to limit the paint operations necessary in partial repaints. A region can be anything from a simple rectangle to a bitmap mask, but virtually all code that inspects a […]
Qt on Android: How to convert Qt images to Android Images and vice-versa
Sometimes we need to exchange images from Android world to Qt world and vice-versa, therefore in this article we’re going to see how to convert a QImage to an Android Bitmap and how to convert an Android bitmap and an Android Drawable into a QImage. To get access to Android Bitmap data & info we’re […]
Physically Based Rendering (PBR) in 10 minutes Understanding a new rendering model for realistic and consistent graphics
If you happened to be at the NVIDIA GTC conference last week, you may have seen a Qt demo we developed showing a Dodge Viper in the Toradex booth. If that Viper looked especially cool, that’s partially because it was displayed using Physically Based Rendering (PBR). Alright… what exactly is PBR, and can I use it in my […]
Windows Dressing The Abbreviated Guide to Running Qt on Embedded Windows
Microsoft Windows has a long history of embedded operating systems going back to 1996, branded as Windows Embedded Compact, Windows Embedded CE, Windows CE, Windows Compact, Windows Phone, Windows Runtime, and an assortment of others. One of these fine platforms might even form the basis of your embedded product. Trouble is, with the shiny new […]
Qt on Android: How to create a zero-copy Android SurfaceTexture QML item
Motivation: Android SurfaceTexture is used by all Android classes that need to display (a lot of) frames, it can be used to display media player, camera, etc. You can also use it in combination with other players: OpenMAX, VLC, etc. (well, VLC and other C++ player are using MediaCodec) to decode the images directly to […]
KDAB contributions to Qt 5.6
Qt 5.6 has just been released! Packed with incredible new features, 5.6 is also the first long term support release of Qt: it will be supported for the next 3 years, giving developers a solid foundation for their current and upcoming projects. Once more, KDAB is confirmed to be the largest independent contributor to Qt, […]