On Tue, Nov 10, 2015 at 12:01 PM, Ian Romanick <i...@freedesktop.org> wrote: > On 11/09/2015 04:29 PM, Ilia Mirkin wrote: >> On Mon, Nov 9, 2015 at 7:10 PM, Ian Romanick <i...@freedesktop.org> wrote: >>> On 11/04/2015 03:26 PM, Ryan Houdek wrote: >>>> I'm hoping to potentially convince about lowering the minimum >>>> requirement of EXT_buffer_storage from ES 3.1 to ES 3.0. >>>> The only thing that causes it to require ES 3.1 is glMemoryBarrier, >>>> which shouldn't really be a hard requirement since the extension can be >>>> used without it. >>>> This is also a similar situation with ARB_buffer_storage which Mesa >>>> currently exposes to all GL versions even though it should require GL 4.2. >>>> I have my attempt at a change to the spec as follows. I've never tried >>>> changing a spec page before so it's a bit new to me. >>> >>> I think all of the drivers that support ARB_buffer_storage also support >>> ARB_texture_barrier. At the very least I think you'd need to require >>> GL_MAP_CHOERENT_BIT with GL_MAP_PERSISTENT_BIT. >> >> Not freedreno (and only very recently for i965). Although I guess it >> shouldn't be too hard to stick a gmem2mem step into the queue for such >> an occasion without interrupting the tiling. >> >>> Also... Mesa is really close to getting OpenGL ES 3.1. Are there any >>> drivers with which you want to use this extension that won't have GLES 3.1? >> >> It'll be quite a while before freedreno supports GLES 3.1, and it's >> unclear to me that the a3xx hardware will even be capable of it >> (although it quite possibly may be). > > The goal was that GLES 3.1 would be implementable on any hardware on > which vendors had shipped GLES 3.0. Although wikipedia > (https://en.wikipedia.org/wiki/Adreno) thinks only A4xx can do GLES 3.1. > Given that it also lists OpenCL 1.1 and DX 11.1 (although it does also > say only feature level 9_3 is supported), I think the hardware can do > it, but Qualcomm just didn't have customer demand to implement it.
Well A4xx has shipping drivers for ES 3.1, but I believe Qualcomm's position is that they won't be providing updated drivers supporting ES 3.1 for A3xx. Having looked over the various ES 3.1 features, I believe that a3xx will be able to eventually support it with an acceptable quantity of software emulation (like indirect draws). But it'll be a while before freedreno gets there... just pushing GL 3.1 out the door :) I wonder if we'll be able to support ES 3.1 on Intel Sandy Bridge, NVIDIA Tesla family (G80-GT218), or ATI R600/R700 GPU's, all of which support ES 3.0 today. OTOH, they're unlikely targets for ES software. -ilia _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
