[Bug 42646] New: GdipDrawPath call raises " Invalid floating point operation." exception

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=42646

            Bug ID: 42646
           Summary: GdipDrawPath call raises "Invalid floating point
                    operation." exception
           Product: Wine
           Version: 2.3
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gdiplus
          Assignee: wine-bugs at winehq.org
          Reporter: remk_1 at yahoo.com
      Distribution: ---

Created attachment 57579
  --> https://bugs.winehq.org/attachment.cgi?id=57579
Testcase - Unzip and run under Wine to see the error

Applications calling GdipDrawPath function (part of gdiplus.dll) raise "Invalid
floating point operation." exception when the following two conditions are met:

- pen width used to draw the path is 1 (the shape is drawed correctly when the
pen is wider)
- the graphics object used to draw the shape is a bitmap (when it is drawn
directly on a form canvas without the temporary bitmap, there is no exception
raised)

  See the attached WineGdipBug.exe file that demonstrates the problem. I attach
also a very simple Delphi XE2 source code used to build the testcase.

  Under native Windows, the testcase application correctly displays simple form
with a rectangle drawn inside it.

  In wine-2.0 or higher, including wine-2.3, the application displays exception
window with a message "Invalid floating point operation." The message is shown
several times, whenever the form has to be repainted.

  In older Wine versions up to wine-1.9.9, the exceptions are not risen, but
the path rectangle was not drawn either. Shell windows shows a warning
"fixme:gdiplus:GdipDrawPath graphics object has no HDC", which is probably
related to the bug. Needless to say that the missing frame and warning was just
a little annoyance compared to the current Wine versions, that makes affected
applications almost unusable.

Tested at Fedora 24 and Ubuntu 16.04 LTS

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