[Bug 36723] New: [r300g, bisected] Unigine Sanctuary: fog is not rendered properly

[Bug 36723] New: [r300g, bisected] Unigine Sanctuary: fog is not rendered properly

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https://bugs.freedesktop.org/show_bug.cgi?id=36723

           Summary: [r300g, bisected] Unigine Sanctuary: fog is not
                    rendered properly
           Product: Mesa
           Version: git
          Platform: All
               URL: http://www.unigine.com/download/#sanctuary
        OS/Version: Linux (All)
            Status: NEW
          Keywords: regression
          Severity: minor
          Priority: medium
         Component: Drivers/Gallium/r300
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: pavel.ondracka@email.cz


Created an attachment (id=46198)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=46198)
screenshot of the problem

Fog in Unigine Sanctuary is not rendered properly, there are some "stripes" in
the fog, which weren't present before. Screenshot attached.

fe622bac0c1b5b9f2a9fcf9f35b51232a06bea42 is the first bad commit
commit fe622bac0c1b5b9f2a9fcf9f35b51232a06bea42
Author: Tom Stellard <tstellar@gmail.com>
Date:   Tue Jan 11 00:05:08 2011 -0800

    r300/compiler: Rewrite register allocator

    The new allocator uses ra and does swizzle packing.

    Also, a data structure (struct rc_variable) and associated functions have
    been added for generating UD and DU chains.

This may also be related to the floating textures, since the fog wasn't
rendered at all before the floating work was committed.

GPU: RV530
mesa: d7cf9833d7138daa1c2acdc489ab0c86c2ea7e41
kernel: 2.6.38.2

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[Bug 36723] [r300g, bisected] Unigine Sanctuary: fog is not rendered properly

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https://bugs.freedesktop.org/show_bug.cgi?id=36723

--- Comment #1 from Pavel Ondračka <pavel.ondracka@email.cz> 2011-08-29 02:44:41 PDT ---
Since "linker: Reject shaders that use too many varyings" most of the fog is
not rendered at all and the rest is fine.

Terminal output:
GLShader::compile(): error: shader uses too many varying components (36 > 32)
Material::create_shader(): can't compile
"core/shaders/volumes/vertex_box_fog_ambient.shader" vertex shader
defines:
UNKNOWN,QUALITY_LOW,MULTISAMPLE_0,USE_INSTANCING,USE_DEFERRED,OPENGL,USE_PSEUDO_INSTANCING,USE_PSEUDO_TRANSFORM,,NOISE,HEIGHT���
Material::create_shader(): can't compile
"core/shaders/volumes/fragment_box_fog_ambient.shader" fragment shader
defines:
UNKNOWN,QUALITY_LOW,MULTISAMPLE_0,USE_INSTANCING,USE_DEFERRED,OPENGL,USE_PSEUDO_INSTANCING,USE_PSEUDO_TRANSFORM,,NOISE,HEIGHT���
GLShader::compile(): error: shader uses too many varying components (36 > 32)
Material::create_shader(): can't compile
"core/shaders/volumes/vertex_sphere_fog_ambient.shader" vertex shader
defines:
UNKNOWN,QUALITY_LOW,MULTISAMPLE_0,USE_INSTANCING,USE_DEFERRED,OPENGL,USE_PSEUDO_INSTANCING,USE_PSEUDO_TRANSFORM,,NOISE,HEIGHT���
Material::create_shader(): can't compile
"core/shaders/volumes/fragment_sphere_fog_ambient.shader" fragment shader
defines:
UNKNOWN,QUALITY_LOW,MULTISAMPLE_0,USE_INSTANCING,USE_DEFERRED,OPENGL,USE_PSEUDO_INSTANCING,USE_PSEUDO_TRANSFORM,,NOISE,HEIGHT���


So the original bug is gone and the new one is a different problem. Is this too
many varying message a WONTFIX?

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[Bug 36723] [r300g, bisected] Unigine Sanctuary: fog is not rendered properly

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https://bugs.freedesktop.org/show_bug.cgi?id=36723

--- Comment #2 from Tomasz P. <son_of_the_osiris@interia.pl> ---
The problem still exists with current mesa-git ?

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[Bug 36723] [r300g, bisected] Unigine Sanctuary: fog is not rendered properly

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https://bugs.freedesktop.org/show_bug.cgi?id=36723

--- Comment #3 from Pavel Ondračka <pavel.ondracka@email.cz> ---
(In reply to comment #2)
> The problem still exists with current mesa-git ?

Yeah, the broken fog is still there.

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[Bug 36723] [r300g, bisected] Unigine Sanctuary: fog is not rendered properly

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https://bugs.freedesktop.org/show_bug.cgi?id=36723

--- Comment #4 from Marek Olšák <maraeo@gmail.com> ---
This is not a compiler issue. The fog isn't rendered properly, because there
are not enough varyings. I have a patch that reuses unused color varyings for
texcoords. It fixes the fog, but it also breaks a lot of other things.

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[Bug 36723] [r300g, bisected] Unigine Sanctuary: fog is not rendered properly

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https://bugs.freedesktop.org/show_bug.cgi?id=36723

Marek Olšák <maraeo@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #5 from Marek Olšák <maraeo@gmail.com> ---
Fixed with 85efb2fff0d4de56c31e414fd05a37d212211da1. Closing.

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