Bug 36083

Summary:	Feature wish: EXT_gpu_shader4
Product:	Mesa	Reporter:	s3734770
Component:	Mesa core	Assignee:	mesa-dev
Status:	RESOLVED FIXED	QA Contact:
Severity:	enhancement
Priority:	medium
Version:	git
Hardware:	Other
OS:	All
Whiteboard:
i915 platform:		i915 features:
Attachments:	First start

Description s3734770 2011-04-08 09:25:54 UTC

I would like to have the EXT_gpu_shader4 implemented into mesa for the following reasons:
 - gl_InstanceID is defined for GLSL then
 - Integers for shaders
 - Introducing of geometry shaders to run gs demos

as a spin-off, GL_EXT_geometry_shader4 would be implemented

Implementing this extension is hard, but please do it. Modern game engines are depending on it, engines like Unigine.

Comment 1 s3734770 2011-04-16 00:26:01 UTC

Created attachment 45694 [details] [review]
First start

This patch does a first step towards implementing gpu_shader4: gl_InstanceID

Even if it's a small change, please review the patch. It also fixes a issue with Unigine Heaven.

Comment 2 Marek Olšák 2011-04-16 00:59:00 UTC

If you are fixing a driver by this, let's just disable the extension until gl_InstanceID is supported.

I can disable it for r600g if you like.

Comment 3 s3734770 2011-04-16 01:14:32 UTC

i'm not fixing a driver, 
Unigine Heaven uses EXT_gpu_shader4 without checking for it.

So disabling an extension would not solve the problem.

I'm serious. This is the start of implementing EXT_gpu_shader4 in mesa.

Comment 4 Marek Olšák 2011-04-16 01:24:51 UTC

No, Heaven doesn't use EXT_gpu_shader4. Or maybe it does, but it doesn't require it if the extension is not exposed by a driver. Heaven is only incorrectly using GL_ARB_draw_instanced.

Note that Heaven works on r300g and r600g has a very similar extension list, so it should work too.

Comment 5 s3734770 2011-04-16 01:29:36 UTC

But that's not Topic of this bug report.
Should I open an other one to fix the Unigine Heaven problem?

This bug report should stay for gpu_shader4 issues

Comment 6 Tapani Pälli 2014-08-19 10:27:59 UTC

AFAIK the features listed in comment #1 exist, please reopen if not.

Comment 7 Matt Turner 2014-08-19 17:14:19 UTC

Well, neither EXT_gpu_shader4 nor GL_EXT_geometry_shader4 exist, but GL 3.2 has the features he mentions.

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