On Feb 25, 2013, at 8:22 PM, George Wright <[email protected]> wrote:
> On 02/23/2013 04:00 PM, Andreas Gal wrote: >> OpenVG is a Khronos standard API for GPU accelerated 2D rendering. Its very >> similar to OpenGL in design. In fact, its an alternative API to OpenGL ES on >> top of EGL. It looks like that OpenVG is supported on most Android devices >> and is used there by Flash (or well used to be used). B2G devices have >> OpenVG support as well. There are also a number of open source >> implementations of OpenVG that use OpenGL to accelerate 2D operations that >> might be interesting for the desktop. OpenVG is pretty similar to Cairo and >> Skia when it comes to the actual operations offered. The biggest drawback of >> OpenVG is that it doesn't mix well with OpenGL. Its possible to render with >> OpenVG to a texture and then composite that with OpenGL, but its not >> possible to do mixed rendering with VG and GL to the same surface. That >> having said, I still think we should consider adding an OpenVG backend. It >> would potentially significantly speed up rendering on mobile hardware. >> OpenVG is quite a bit more seasone d t >> han Skia/SkiaGL, and explicitly targets mobile, whereas SkiaGL seems to be >> mostly optimized for the desktop (at least so far). A particular advantage >> of OpenVG is that it can take advantage of dedicated 2D acceleration >> hardware (Mali and Adreno both have special 2D hardware OpenVG uses). SkiaGL >> on the other hand is limited to using GLES to accelerate 2D drawing >> operations. What do people think. Should we add a OpenVG backed? >> > > My (very limited) knowledge about OpenVG is that people in the industry > at the vendor level tend to not care about it. I think the reason for > this is basically that there aren't any significant users of OpenVG > (WebKit used to have a VG backend but it only had one user and has now > been disowned). As a result of this indifference from the vendors, my > understanding is that there aren't any actual hardware accelerated VG > implementations. I think Qualcomm used to have one, but if I remember > correctly they didn't really want to keep maintaining it. I am trying to get feedback from 3 different chipset vendors. We should know pretty soon what the support level looks like these days. Andreas _______________________________________________ dev-platform mailing list [email protected] https://lists.mozilla.org/listinfo/dev-platform
