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I've recently started exploring the guts of VirtualBox's Guest Extensions on my Ubuntu Guest. Mostly from curiosity. Partly due to "OpenGL Warning: ... not found in mesa table" warnings. I noticed they are using Chromium OpenGL implementation. I have a two part question.
1.How do I get rid of those warnings? Are they indications of a larger problem? I'm noticing repaint issues which lead me down this path.
2.Am I missing something are is this a 12 year old project last touched 6 years ago!? Is it being actively developed some where else? Will it support OpenGL 3?
Online references would be appreciated as I'm having a hard time finding anything other than these below.
http://sourceforge.net/p/chromium/discussion/stats
http://chromium.sourceforge.net/doc/index.html
The chromium project is basically dead since 2008 or so. There is no support for GL3.x, and it is not planned. Actually, implementing the main purpose of chromium (application-transparent distributed rendering by manipulating the GL command stream) is incredibly hard to outright impossible with the programmable pipeline and modern GL features.
I'm not really familiar with virtualbox, but I am aware that they just used parts of the chromium project to implement a hw-accelerated guest GL simply by forwarding the GL command stream to the host. Such a task is much easier to adapt to modern GL, as no real stream manipulation is to be done. But I'm not aware of how far they have come on that path. So consider this only half of an answer to your question.
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Can I distribute any Directx based application commercially? Do I need to get any permission from Microsoft? Actually I'm developing a software such like "Rendering Engine". But I don't know much about the EULA.
I also have the same issue with OPENGL and Metal.
Note: I'm not using Visual Studio for the development.
Can I distribute any Directx based application commercially?
Yes.
Do I need to get any permission from Microsoft?
No.
I also have the same issue with OpenGL and Metal.
It's not an issue at all. DirectX, OpenGL, Metal, and so on are merely APIs. For one it has been legally ruled out that the use of publicly documented APIs can be subjected to licensing. A particular implementation of an API may have licensing strings atteched to it. But just the interface itself, not so much.
As of writing this there's a lawsuit between Oracle and Google if independently reimplementing an API without permission is a copyright violation (in this case the Java runtime implemented in Android vs. the original Java runtime of the Sun/Oracle). But a lot of people agree, that it's probably not copyright-able.
As for APIs like DirectX, OpenGL, Metal and so on: There is a very stong interest for the creators of these APIs for them to be actually used. So there are no roalities attached to them.
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I need some unbiased views from experts. I bought BobCAD a couple months ago. It did run fine while evaluating and also after installation. Now, after some use it starts crashing with multiple "null Pointer" exceptions on closing the simulation mode.
Tech support is telling me that it is the graphic card that behaves (I quote:) "unpredictable". They say an integrated graphic card is only good for word and internet browsing.
However BobCad once run fine, I can perfectly play games, use CAD or other applications on my computer without crashing it. This leads me to having a hard time to believe this. BobCad does not use a lot of resources contrary to what they claim. There is no lagging or signs of useng my computer at the limit of what it is capable of.
From what I know you do not program the graphic card directly anymore - and certainly not in a CAM application, so those problems with graphic cards should be gone.
From what I see BobCad is a WPF application presumably written in C++
Please tell me, are they right? Is my suspicion of them not being very competent wrong?
Help me out with your experiences.
Best Regards
Leo
A expensive dedicated graphic card is usually better than an integrated,
but that doesn´t means that integrated ones can´t do any real work.
Gc´s are directly programmed, even today (usage is even rising).
But, probably not in a WPF application...
Anyway, that all is no excuse for Nullpointerexceptions delivered to the user.
That´s simply a programming error, doesnt´t matter what your Gc is capable of.
If the program says "The Gc is too weak" it´s one thing, but crashing is inacceptable.
(And, incomptent support people are nothing unusual, sadly.)
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I really need info about Nokia developing. Can I program Nokia (Symbian) devices only with C++, or I need Qt too? (I have Nokia Qt SDK). I'm not really sure about GUI programing, so I ask for help :)
Also it would be really helpful, if you could tell me how to make something like cmd-style on Nokia (Symbian) <--(this is an optional question)
There are probably multiple ways to accomplish what you're trying to write (as Bala.C pointed out, you can use java), but the latest releases of the symbian OS have really encouraged people to write with Qt and specific with QML. That will likely have the fastest and smoothest interface to the device, because they've spent a fair amount of time optimizing it for the platform. Plus it'll make your application more portable to their N9 and other Qt based phones (the yet-to-ship non-windows Lumia).
I'm sure there is likely an API to tie directly into their lower-level architecture for drawing on the screen as well, but I suspect it's both not-well documented (unlike Qt) and subject to change from release to release as they don't expect developers to be using it as much.
Well, I don't think only C++ will do, but with Java it will be great.
Please go through the following link, it could help you equip yourself for Nokia Symbian Development.
http://www.developer.nokia.com/Develop/Web/Web_runtime.xhtml
Good luck
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Is is possible to do Open GL development and run programs on a computer with out a graphics card? (e.g. my netbook running Ubuntu)
Update This was many years ago, the link is not available anymore, and there are probably newer, better, builds now.
Yes, you can use MESA.
For your convenience, I've compiled it in both 32- and 64bit at:
http://dl.dropbox.com/u/9496269/mesa.zip
Simply put them where your executable file is located.
Sure. Many software only implementations of OpenGL exist. Check out the Mesa project at http://www.mesa3d.org/ for one of the most popular. There are parts of the shading language not fully supported, and it tends to lag the standard a bit in general, but that is the case of all software API emulators. Its still very full featured and can be used in production code for many common uses.
You can use OpenGL on many integrated GPUs, mostly AMD chips like the Ryzen 3 3200G, which has a GPU that is the same as a GTX 1050 for around £100.
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How can I get QNX C/C++ sample code?
Since QNX is proprietary, it can be hard to get a "jump start".
But as Research In Motion (the makers of BlackBerry) acquired it and are heavily investing on it - in the hopes to get as many developers as possible to jump on the new BBX platform, you may benefit from learning QNX via RIM - and maybe even winning a free Playbook tablet.
You can download the Native Development Kit (NDK) from this website: https://bdsc.webapps.blackberry.com/native/
It is a slightly modified version of Eclipse called Momentics. Using the Playbook simulator (which runs under a - hopefully - free version of VMWare) you can write, compile and run your QNX softwares.
I suggest you taking a close look at PPS objects. They are the most outstanding "idiosyncrasy" of QNX and mastering it will pretty much enable you as a QNX developer. Also, try to register for Foundry27 on QNX website and there you will find handful of (unfortunately almost hidden from Google) resources on QNX.
I hope that helps!
EDIT: and with the NDK it comes with a handful of examples. You will find them pretty much similar to POSIX.
QNX Community Resources is always a good source of help and sample code for QNX.
Usually, library reference entries have a small sample code, e.g. MsgDeliverEvent.
If you go to QNX.com, download the QDE/Momentics trial, you'll get an Eclipse-CDT which will have examples available from the start page.
QNX Neutrino is also similar enough to Linux/Unix systems that most software examples (for example socket and terminal io code) will be equally applicable to QNX as they are for their Unix system.