New subject: [Bug 52440] GdipRotateWorldTransform+GdipDrawImage draws wrong

22 Jan 2022


      https://bugs.winehq.org/show_bug.cgi?id=52440
Bug ID: 52440
           Summary: GdipRotateWorldTransform+GdipDrawImage draws wrong
           Product: Wine
           Version: 7.0
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gdiplus
          Assignee: wine-bugs@winehq.org
          Reporter: hjkl@quantentunnel.de
      Distribution: ---
Created attachment 71713
  --> https://bugs.winehq.org/attachment.cgi?id=71713
Example to reproduce issue
The image output of GdipDrawImage is wrong if applying a rotation with
GdipRotateWorldTransform.
I attached an example to reproduce the issue.
The .zip file contains:
WindowsOutput.png: screenshot of how Windows paints it
WineOutput.png: screenshot of how Wine paints it (on Debian 11.2)
source: the according source code (Visual C++ 2019 solution),
source\x64\Release\Example.exe is the compiled EXE.
The example loads "image.png" from the same directory (just a 16x16 pixels red
block) and shows it with the rotation.
This is the critical code:
Gdiplus::DllExports::GdipRotateWorldTransform(pGr, 10,
Gdiplus::MatrixOrderAppend);
Gdiplus::DllExports::GdipDrawImage(pGr, g_pImg, 100, 50);
Thanks in advance!
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[Bug 52440] New: GdipRotateWorldTransform+GdipDrawImage draws wrong