[Bug 15505] New: STM_SETIMAGE does not handle bitmaps with alpha correctly

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=15505

           Summary: STM_SETIMAGE does not handle bitmaps with alpha
                    correctly
           Product: Wine
           Version: 1.1.5
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P2
         Component: user32
        AssignedTo: wine-bugs at winehq.org
        ReportedBy: thestig at google.com


In XP, STM_SETIMAGE makes a copy of bitmaps with alpha, which allows
applications to delete the bitmaps they passed in. Many programmers expect this
as the default behavior, since they don't test on older Windows platforms.

Our STM_SETIMAGE implementation still follows the pre-XP behavior, which may
cause rendering problems for apps that use STM_SETIMAGE extensively.

I don't have a minimal test case just yet...


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