https://bugs.freedesktop.org/show_bug.cgi?id=56826
Priority: medium
Bug ID: 56826
Assignee: mesa-dev@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+freedesk...@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).
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