[Bug 30122] New: r600 scrambled render when using 2d texture sample for 1d texture co-ord in fragment shader

[bugzilla-daemon@freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=30122

           Summary: r600 scrambled render when using 2d texture sample for
                    1d texture co-ord in fragment shader
           Product: Mesa
           Version: git
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: thomas.jones@utoronto.ca


Created an attachment (id=38612)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=38612)
small program that triggers the bug

Using a shader like this results in a strange scrambled rendering:


uniform sampler2D src;
uniform sampler1D pal;
void main() {
    gl_FragColor = texture1D(pal, texture2D(src, gl_TexCoord[0].xy).x);
}

it looks like in addition to just being messed up it also gets the texture
co-ordinates wrong (I'm rending with GL_QUADS, the two triangles that make up
the quad seem to be interpolating differently across the middle)

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