[Bug 101451] [G33] ES2-CTS.functional.clipping.polygon regression

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101451

            Bug ID: 101451
           Summary: [G33] ES2-CTS.functional.clipping.polygon regression
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: ville.syrjala at linux.intel.com
          Reporter: mark.a.janes at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org
                CC: mirlan.ax.tokonbekov at intel.com

Bisected to:
mesa c1eedb43f32f6a3733f26e7918eb028f68bd60a4
Author:     Ville Syrjälä <ville.syrjala at linux.intel.com>

i915: Fix wpos_tex vs. -1 comparison

wpos_tex used to be a GLuint so assigning -1 to it and
later comparing with -1 worked correctly, but commit
c349031c27b7 ("i915: Fix texcoord vs. varying collision in
fragment programs") changed wpos_tex to uint8_t and hence
broke the comparison. To fix this define a more explicit
invalid value for wpos_tex.

Failing tests:
ES2-CTS.functional.clipping.polygon.multiple_0
ES2-CTS.functional.clipping.polygon.multiple_0_viewport_center
ES2-CTS.functional.clipping.polygon.multiple_0_viewport_corner
ES2-CTS.functional.clipping.polygon.multiple_1
ES2-CTS.functional.clipping.polygon.multiple_1_viewport_center
ES2-CTS.functional.clipping.polygon.multiple_1_viewport_corner
ES2-CTS.functional.clipping.polygon.poly_attrib_clip
ES2-CTS.functional.clipping.polygon.poly_attrib_clip_viewport_center
ES2-CTS.functional.clipping.polygon.poly_attrib_clip_viewport_corner
ES2-CTS.functional.rasterization.interpolation.projected.line_loop
ES2-CTS.functional.rasterization.interpolation.projected.line_strip
ES2-CTS.functional.rasterization.interpolation.projected.lines
ES2-CTS.functional.rasterization.interpolation.projected.triangle_fan
ES2-CTS.functional.rasterization.interpolation.projected.triangle_strip
ES2-CTS.functional.rasterization.interpolation.projected.triangles
ES2-CTS.functional.clipping.polygon.multiple_1
Standard Output:

Render target size: 400x300
Viewport: left=0        bottom=0        width=200       height=200
Rendering triangles. Coordinates:
        v0 (x=-0.2      y=-0.3  z=0     w=1)            (red)
        v1 (x=0.2       y=-0.3  z=0     w=1)            (yellow)
        v2 (x=0 y=-0.9  z=2     w=1)            (+Z clip)       (blue)
        v0 (x=0.6       y=1.2   z=0     w=1)            (+Y clip)       (red)
        v1 (x=1.2       y=0.6   z=0     w=1)            (+X clip)      
(yellow)
        v2 (x=0.6       y=0.6   z=0     w=1)            (blue)
        v0 (x=0.6       y=-1.2  z=0     w=1)            (-Y clip)       (red)
        v1 (x=1.2       y=-0.6  z=0     w=1)            (+X clip)      
(yellow)
        v2 (x=9.6       y=-9.6  z=0     w=16)           (blue)
        v0 (x=0.6       y=1.2   z=0     w=1)            (+Y clip)       (red)
        v1 (x=1.2       y=0.6   z=0     w=1)            (+X clip)      
(yellow)
        v2 (x=9.6       y=9.6   z=0     w=16)           (blue)
        v0 (x=-0.6      y=1.2   z=0     w=1)            (+Y clip)       (red)
        v1 (x=-1.2      y=0.6   z=0     w=1)            (-X clip)      
(yellow)
        v2 (x=-9.6      y=9.6   z=0     w=16)           (blue)
        v0 (x=-0.6      y=-1.2  z=0     w=1)            (-Y clip)       (red)
        v1 (x=-1.2      y=-0.6  z=0     w=1)            (-X clip)      
(yellow)
        v2 (x=-9.6      y=-9.6  z=0     w=16)           (blue)
Comparing images... 
Deviation within radius of 1 is allowed.
6 faulty pixels are allowed.
80 deviating pixel(s) found.
4588 faulty pixel(s) found.
Got 4588 faulty pixel(s).


Sample output:
ES2-CTS.functional.clipping.polygon.multiple_1
Standard Output:

Render target size: 400x300
Viewport: left=0        bottom=0        width=200       height=200
Rendering triangles. Coordinates:
        v0 (x=-0.2      y=-0.3  z=0     w=1)            (red)
        v1 (x=0.2       y=-0.3  z=0     w=1)            (yellow)
        v2 (x=0 y=-0.9  z=2     w=1)            (+Z clip)       (blue)
        v0 (x=0.6       y=1.2   z=0     w=1)            (+Y clip)       (red)
        v1 (x=1.2       y=0.6   z=0     w=1)            (+X clip)      
(yellow)
        v2 (x=0.6       y=0.6   z=0     w=1)            (blue)
        v0 (x=0.6       y=-1.2  z=0     w=1)            (-Y clip)       (red)
        v1 (x=1.2       y=-0.6  z=0     w=1)            (+X clip)      
(yellow)
        v2 (x=9.6       y=-9.6  z=0     w=16)           (blue)
        v0 (x=0.6       y=1.2   z=0     w=1)            (+Y clip)       (red)
        v1 (x=1.2       y=0.6   z=0     w=1)            (+X clip)      
(yellow)
        v2 (x=9.6       y=9.6   z=0     w=16)           (blue)
        v0 (x=-0.6      y=1.2   z=0     w=1)            (+Y clip)       (red)
        v1 (x=-1.2      y=0.6   z=0     w=1)            (-X clip)      
(yellow)
        v2 (x=-9.6      y=9.6   z=0     w=16)           (blue)
        v0 (x=-0.6      y=-1.2  z=0     w=1)            (-Y clip)       (red)
        v1 (x=-1.2      y=-0.6  z=0     w=1)            (-X clip)      
(yellow)
        v2 (x=-9.6      y=-9.6  z=0     w=16)           (blue)
Comparing images... 
Deviation within radius of 1 is allowed.
6 faulty pixels are allowed.
80 deviating pixel(s) found.
4588 faulty pixel(s) found.
Got 4588 faulty pixel(s).

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