[Bug 30784] New: CodeJock's XTPToolBar renders transparent areas of icons black

http://bugs.winehq.org/show_bug.cgi?id=30784

Bug #: 30784
           Summary: CodeJock's XTPToolBar renders transparent areas of
                    icons black
           Product: Wine
           Version: 1.5.5
          Platform: x86
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdi32
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]
    Classification: Unclassified

This was found while testing bug 28646, which has same symptom but different
cause.

Affects commercial apps based on CodeJock's "Xtreme ToolkitPro",
e.g. apps from tannereda.com and securenetterm.com.

To reproduce:

wget http://www.codejock.com/download/win32/TabbedToolbar.zip
unzip TabbedToolbar.zip
rm -rf ~/.wine
winetricks mfc42
wine TabbedToolbar.exe
Click on 'Other' tab

The fifth icon on the toolbar (with an envelope and a clock) has a black
background in current wine, but looks good in wine-1.5.4 and earlier.

bisect reveals

b81a7d976e3c3de36a01401d125871d3014e6c67 is the first bad commit
commit b81a7d976e3c3de36a01401d125871d3014e6c67
Author: Alexandre Julliard 
Date:   Fri May 25 11:47:46 2012 +0200

gdi32: Always use the DIB engine for monochrome bitmap rendering.