I'm using 'imx6-sabresd_qt5_defconfig' on i.Mx6 (buildroot) and qt app is QT box demo.
When I run app, it show this error:
error: This example requires Qt to be configured with -opengl desktop
How to fix this? Do I need to add something in menucofig?
Your platform provides an OpenGL ES (OpenGl for embedded systems) implementation. This example requires a full OpenGL implementation. It is just not a suitable for your platform.
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Is it possible to connect to WiFi from QML (without writing some C++ code)?
According to this article it is possible. And this article starts right away with import B2Qt.Wifi 1.0, implying that such module is available, but I get an error module "B2Qt.Wifi" is not installed.
I have a commercial Qt 5.7 and I installed all the components, so it should be there. However, there is no module with such name in the entire installation directory.
I tried to do it on Windows and Linux with the same result.
Maybe I need to download this module from somewhere else? That would be weird though.
B2Qt means 'Boot to Qt'. It's for the devices where you prepare an image and then flash it onto the device.
So, it uses a specific network manager that is built into that image. And there is a B2Qt.Wifi module to configure that specific network manager.
I think it won't work with the network managers on desktop Linux, Mac or Windows.
I want to build a sample included in Vulkan SDK.
I downloaded the SDK from http://vulkan.lunarg.com and install it.
Then I opened the Visual Studio (I have a 2013 version), I open the solution from this path: (C:\VulkanSDK\1.0.13.0\Demos). I choose DEMOS.sln file. Then when I click on LocalWindowsDebugger this message pops up:
vkCreateInstance Failure:
vkEnumerateInstanceExtensionProperties failed to find the VK_KHR_surface extention.
Do you have a compatible Vulkan installable client driver (ICD) insatalled? Please look at the Getting Started guide for additional information.
I have never worked with vulkan, but as it named "Demo", I think that everything inside of it should be set in order to work.
I searched the web, but as it is new, there are few resources talked about it.
What is ICD? and how to install it? (is it different from installer of VulkanSDK?) OR this error is about completely different property? like setting properties of VisualStudio?
ICD is basically your GPU driver...
Both the SDK and driver install vulkaninfo app. Use it to determine what extensions you have and whatnot.
BTW Some time ago AMD drivers forgot to export the extensions like VK_KHR_surface. Make sure you are using the latest driver (16.5.2.1 on AMD and 365.19 on NVIDIA as of time of writing).
Also you need supported GPU. Consult:
NVIDIA supported GPUs
AMD supported GPUs
Khronos maintained list
BTW: All the demos work for me.
Do you have a compatible Vulkan installable client driver (ICD) installed?
This message tells you that Vulkan's loader wasn't able to find a Vulkan driver on your device. ICD is the installable client driver that comes with the driver of your graphics card.
What GPU are you using and do you have a driver installed that actually supports Vulkan? Note that while your card may support OpenGL it may not support Vulkan.
Check NVIDIA(performance mode) is selected at "Nvidia X Server Settings" application if you are using ubuntu.
I am using the Kinect for Xbox and I am planning on using the OpenNI framework along with the Point Cloud Library for processing but I am having trouble getting OpenNI to recognize my Kinect for Xbox and I wanted to make sure that it is actually compatible with the device.
For some reason I haven't been able to find any documentation on this exact topic.
PCL does indeed work with OpenNI. I've managed to easily compile the OpenNI Grabber Sample on Windows (using the All In One installer). I must admit I haven't managed the same on osx (had some issues with various versions of VTK being installed on the machine).
By the looks of it the issue doesn't look like it's on the PCL side, but on the OpenNI driver side. Can you run any of the samples ? If not, what error messages are you getting ?
I recommend cleaning up (uninstalling OpenNI, NITE, SensorKinect) and installing the unstable versions, but try installing in this order:
OpenNI 1.5.4.0
Nite 1.5.2.21
Avin's SensorKinect
Which version of OpenNI that you use?
If you use version 1.5.4, I think there is no problem because OpenNI interact directly with your Kinect Xbox.
However, if you use OpenNI version 2.x, it will interact with your device via Kinect SDK (http://social.msdn.microsoft.com/Forums/en-US/kinectsdk/thread/a11ff6d9-7fbe-4636-8ff0-92d6220ac3f8/) Since there is no Kinect SDK on linux, you can't make OpenNI 2 to recognize your device.
I have an app using a render engine which can switch between D3D and OpenGL (on Windows at least!) We also use XULRunner for embedded web-browser functionality. XULRunner also appears to use D3D and when our engine is in D3D mode, XUL stops working - it just renders black the whole time.
"Use OpenGL" isn't the answer I'm looking for, so what can I do? We are using D3D9.
edit: Apparently GL support is immature, on non-Windows platforms no hardware acceleration is used by default. We've tried to disable it but either there is another bug, or we're not using the right flags. I can't find a good reference for them.
edit: Current release versions of XULRunner as used in FF 3.x don't support hardware acceleration. And yet still, the moment a D3D9 device is created, the Gecko render engine starts painting solid black.
An old question, but both these threads have answers:
DirectX Firefox Plugin rendering artifacts
Writing a plugin using NPAPI + D3D. It works on Firefox, but the browser blacks out. Why?
I've noticed that all betas for Dropbox are released simultaneously for Windows, Mac and Linux. How do they do that? Anyone knows which platform they're using? I'm aware that there are many native -very impressive, actually- functions in each of the platform clients, but they seem to release critical bug fixes efortlessly for all platforms.
So any idea of which GUI platform they're using?
The Linux version includes files such as wx._windows_.so, libwx_gtk2*.so, etc. (I haven't checked the others), so I suspect Dropbox uses wxWidgets.
Qt is a popular cross-platform application and GUI framework with native look-and-feel.
I don't know what Dropbox uses for all its supported platforms, but it looks like its linux client uses at least Gtk: Dropbox linux System Requirements.