Bug 29522 - [i965] no vertex shader textures supported
Summary: [i965] no vertex shader textures supported
Status: VERIFIED FIXED
Alias: None
Product: Mesa
Classification: Unclassified
Component: Drivers/DRI/i965 (show other bugs)
Version: git
Hardware: All All
: medium enhancement
Assignee: Eric Anholt
QA Contact:
URL:
Whiteboard:
Keywords:
: 31506 36728 43359 43360 (view as bug list)
Depends on:
Blocks:
 
Reported: 2010-08-11 19:49 UTC by Gordon Jin
Modified: 2011-12-25 23:34 UTC (History)
5 users (show)

See Also:
i915 platform:
i915 features:

Attachments

Description Gordon Jin 2010-08-11 19:49:59 UTC 
src/mesa/drivers/dri/i965/brw_context.c:
   ctx->Const.MaxVertexTextureImageUnits = 0; /* no vertex shader textures */


This gets mesa glsl demo vert-tex fail under i965 with below error (while pass under swrast):
Error: no vertex shader texture units supported.
Comment 1 Eric Anholt 2010-08-17 14:59:39 UTC 
Not supporting vertex textures is within spec, but something we plan to change as we work towards GL 3.0.
Comment 2 Eric Anholt 2010-11-09 11:51:41 UTC 
*** Bug 31506 has been marked as a duplicate of this bug. ***
Comment 3 Christopher Egert 2011-05-14 15:53:53 UTC 
*** Bug 36728 has been marked as a duplicate of this bug. ***
Comment 4 Md Imam Hossain 2011-08-11 02:27:39 UTC 
Just to express some finding:

Using,

Linux 3.0.1-030001-generic
X.Org X Server 1.10.1
libdrm-2.4.26
xf86-video-intel-2.16.0
mesa-fa351bd2e0aecccd5ed6ef8744d5ba4a6dbf5d2c

and software rendering of Gallium 0.4 on llvmpipe (LLVM 0x208)
by exporting LIBGL_ALWAYS_SOFTWARE=1 before app

vertex textures demo from "GPU Caps Viewer" program by WINE

runs fairly well around 4 fps, I can remember even on Windows on the same hardware it hardly go over 2 fps.

So, I am just wondering, is there any possibility to integrate this Gallium software rendering to Intel Mesa driver only for this functionality, since hardware does not support it.

Thank you
Comment 5 Ian Romanick 2011-12-23 17:35:01 UTC 
*** Bug 43359 has been marked as a duplicate of this bug. ***
Comment 6 Ian Romanick 2011-12-23 17:35:35 UTC 
*** Bug 43360 has been marked as a duplicate of this bug. ***
Comment 7 Ian Romanick 2011-12-23 17:37:07 UTC 
This should be fixed by:

commit 37d24a70daa41bbad9c7a85dd432f561a172e858
Author: Kenneth Graunke <kenneth@whitecape.org>
Date:   Thu Oct 27 21:57:48 2011 -0700

    i965: Advertise our vertex shader texture units.
    
    Previously, we advertised 0 VS texture units.  Now that we have proper
    support for using the sampling engine in the VS, we can advertise 16,
    which is conveniently the number required for OpenGL 3.0.
    
    v2: Enable on Gen4.  I hacked up my tests to not use flat ivec varyings
        and they pass.
    
    Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
    Reviewed-by: Eric Anholt <eric@anholt.net>
    Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Comment 8 Ian Romanick 2011-12-23 17:39:26 UTC 
*** Bug 41609 has been marked as a duplicate of this bug. ***
Comment 9 fangxun 2011-12-25 23:34:38 UTC 
Verified with mesa master commit ec4851253bbf7fd7d11c5570f19f9733a885e471.

Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.