There are modern-ish (Open GL 3/3.2) SWT components maintained here: https://github.com/LWJGLX/lwjgl3-swt
Ned Twigg Lead Software Engineer, DiffPlug LLC 540-336-8043 (cell) 888-513-6870 (fax) 340 S Lemon Ave #3433, Walnut, CA 91789 ᐧ On Tue, Apr 20, 2021 at 12:09 PM Nick Edgar <n.a.ed...@gmail.com> wrote: > For OpenGL stuff, you want to avoid Image / ImageData and keep as much of > the rendering in OpenGL as possible, running on the graphics card. Copying > memory between GPU and main memory (Java heap) will be slow. > SWT has bindings to some OpenGL libraries, but I don’t think they’ve been > updated in quite a while. Have a look though: > https://www.eclipse.org/swt/opengl/ > > Best, Nick > On Apr 20, 2021, 2:15 PM -0400, Christoph Läubrich <lae...@laeubi-soft.de>, > wrote: > > Hi Nick, > > currently I don't have any measures and just trying to collect some > information. My use case is to integrate a software OpenGL render (jGL) > and for that I need to store the rendered pixels somewhere and of course > later I need to paint them. > > I just wondering if I could short-circuit some of the steps > (imagedata>image>gc) and maybe write directly inside some kind of > direct-buffer. > > For example if I look at > > org.eclipse.swt.graphics.Image.init(ImageData) for GTK there seem to > happen some more action than simply keeping a reference to the image > data, e.g. a scale factor is computed, copy of data is involved, color > transformation and so on are performed. > > Maybe as you mention it does not matter, on the other hand the faster > the better here (maybe) this also is a bit depending on the effort to > make this happen here of course but I'd like to investigate a bit if I > should take some internals into account before starting to implement the > actual thing. > > > Am 20.04.21 um 19:19 schrieb Nick Edgar: > > Hi Christoph, > > That approach is generally the recommended way to paint images > < > https://www.eclipse.org/articles/Article-SWT-images/graphics-resources.html > > in > SWT. Painting of a pre-created Image should be as fast as the OS allows. > Have you measured the times involved? Which phase do you need to speed up: > > 1. creating ImageData, > 2. creating Image from ImageData, or > 3. painting Image? > > If 1, see if you can directly manipulate the ImageData’s data, or using > setPixels > < > https://github.com/eclipse/eclipse.platform.swt/blob/eae1f39bbc4fdd01ac0416927ed3fa2d50ec9a9f/bundles/org.eclipse.swt/Eclipse%20SWT/common/org/eclipse/swt/graphics/ImageData.java#L1307 > >. > If 2, check which image format you’re using — it may not map directly to > the native display, and thus be expensive to convert. > If 3, I’d be surprised, but it would be good to know details and the > times for 1,2,3. > > Best, Nick > On Apr 19, 2021, 5:20 AM -0400, Christoph Läubrich > <lae...@laeubi-soft.de>, wrote: > > I have a pixel-buffer and like it o be painted in the most performant > way onto a SWT Canvas. > > Current approach is to convert this into an ImageData, create an image > and then paint it inside PaintListener to the GC. > > Is there a way to avoid this intermediate steps? I won't mind if I need > to provide platform-specific implementations if it is possible to gain > performance here. > _______________________________________________ > platform-dev mailing list > platform-dev@eclipse.org > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/platform-dev > > > _______________________________________________ > platform-dev mailing list > platform-dev@eclipse.org > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/platform-dev > > _______________________________________________ > platform-dev mailing list > platform-dev@eclipse.org > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/platform-dev > > _______________________________________________ > platform-dev mailing list > platform-dev@eclipse.org > To unsubscribe from this list, visit > https://www.eclipse.org/mailman/listinfo/platform-dev >
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