[Bug 106532] AA does not work when drawing lines using Shader under MSAA disable

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106532

            Bug ID: 106532
           Summary: AA does not work when drawing lines using Shader under
                    MSAA disable
           Product: Mesa
           Version: 17.1
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: kiuchi at dux.co.jp
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Anti alias (GL_LINE_SMOOTH) does not work when drawing lines using Shader in
OpenGL.
As a result of our investigation, the context in which MSAA
(MultiSampleAntiAliasing) is enabled, Then It seems that the anti-aliasing will
work if you create it.

So the question is how could we make the anti-aliasing to work under MSAA
disable mode?

For your reference, if you use AMD driver to run it, The anti-aliasing function
works well even when MSAA is disable.

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