[Bug 40902] New: Simple 3D Text screen saver does not show expected graphics

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=40902

            Bug ID: 40902
           Summary: Simple 3D Text screen saver does not show expected
                    graphics
           Product: Wine
           Version: 1.9.13
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: opengl
          Assignee: wine-bugs at winehq.org
          Reporter: carlo.bramix at libero.it
      Distribution: ---

I tried to run some screensavers with WINE and I have seen an unexpected result
with ReactOS 3D Text screensaver.

This screensaver should show a text in a 3D format and rotating over the axis,
see the attached screenshot "Run on Windows.png". WINE is able to execute it,
but it shows a 2D text instead, see the attached screenshot "Run on WINE.png".

I tried to debug a bit the source code of the wglUseFontOutlines() function and
in my opinion there is at least a brutal memory leak here. If you look into:

https://github.com/wine-mirror/wine/blob/master/dlls/opengl32/wgl.c#L1638

there is an HeapAlloc() for allocating the vertices, but later it seems to me
that this pointer is lost because it is changed in some places, see for
example:

https://github.com/wine-mirror/wine/blob/master/dlls/opengl32/wgl.c#L1662

so the next HeapFree() is also directed to a wrong address.
I did a quick fix but, as I expected, this is not the cause of the original
problem, there is something else which causes the text to not be 3D.

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