[Bug 106053] Drawing at screen boundary is very slow.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106053

            Bug ID: 106053
           Summary: Drawing at screen boundary is very slow.
           Product: Mesa
           Version: unspecified
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r300
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: cosiekvfj at o2.pl
        QA Contact: dri-devel at lists.freedesktop.org
                CC: alexdeucher at gmail.com, emil.l.velikov at gmail.com,
                    Hi-Angel at yandex.ru, lemody at gmail.com,
                    madbiologist2016 at outlook.com, maraeo at gmail.com,
                    mark.a.janes at intel.com, michel at daenzer.net,
                    nhaehnle at gmail.com, notasas at gmail.com

Created attachment 138844
  --> https://bugs.freedesktop.org/attachment.cgi?id=138844&action=edit
bitmap for testing

When a partially visible sprites are drawn to the screen, fps drops really
badly.


code tested:
https://gist.github.com/vfjpl/bd442e34036547e4ccb05200762fa274

fully visible = 73.8 fps
fully invisible = 394 fps
partially visible = 5.75 fps


The same situation is happening on Allegro library. I don't know enough OpenGL
to test it directly.

I can provide more test results. Just ask me to do it.

Extended renderer info (GLX_MESA_query_renderer):
    Vendor: X.Org R300 Project (0x1002)
    Device: ATI RC410 (0x5a62)
    Version: 17.3.7
    Accelerated: yes
    Video memory: 128MB
    Unified memory: no
    Preferred profile: compat (0x2)
    Max core profile version: 0.0
    Max compat profile version: 2.1
    Max GLES1 profile version: 1.1
    Max GLES[23] profile version: 2.0


And small question. Why Max core profile shows 0.0? Should I open another
bug-report?

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