[Bug 39730] New: FillRect() confuses 16bit brush handles with color constants

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=39730

            Bug ID: 39730
           Summary: FillRect() confuses 16bit brush handles with color
                    constants
           Product: Wine
           Version: 1.8-rc2
          Hardware: x86
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs at winehq.org
          Reporter: bunglehead at gmail.com
      Distribution: ---

Background window filling breaks because FillRect() gives special treatment for
predefined color constants, that could be used instead of brush handles.

If background brush is set with GetStockObject(WHITE_BRUSH) (or any brush
created early enough really), it's possible that this window background will be
filled using wrong color. What happens is that handle truncation leads to small
enough 16bit handle values that trigger special color path in FillRect().

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