[Mesa-dev] [Bug 56826] New: Not specifying user data for gluTessVertex causes NULL pointer to vertex callback.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56826

          Priority: medium
            Bug ID: 56826
          Assignee: mesa-dev at lists.freedesktop.org
           Summary: Not specifying user data for gluTessVertex causes NULL
                    pointer to vertex callback.
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: noname+freedesktop at nurd.se
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: git
         Component: GLU
           Product: Mesa

Created attachment 69647
  --> https://bugs.freedesktop.org/attachment.cgi?id=69647&action=edit
Reproduces bug in libtess.

Overview
When setting up a callback function for the polygon tesselator (libtess), the
received pointer (which should point to a vertex) is NULL if the third argument
(a pointer to user data) is NULL.

Steps to reproduce
  1) Create GLUtesselator object
  2) Specify a GLU_TESS_VERTEX or GLU_TESS_VERTEX_DATA callback
  3) Tessellate a polygon

  Or see attached file.

Actual results
Supplied vertex callback argument is NULL.

Expected results
Supplied vertex callback argument should point to valid vertex data.

Build Date & Platform
git 2012-11-06, Ubuntu Linux 12.04

Additional Information
Attached test which runs the tessellation in 2 runs, first with the user data
pointer set to a reference to a dummy integer (works), and then with the user
data pointer set to NULL (doesn't work).

-- 
You are receiving this mail because:
You are the assignee for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/mesa-dev/attachments/20121106/0882f9d2/attachment.html>