[Bug 51989] New: pen-related tests (gdiplus:graphics and gdiplus:graphicspath) fail on latest Windows 10

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=51989

            Bug ID: 51989
           Summary: pen-related tests (gdiplus:graphics and
                    gdiplus:graphicspath) fail on latest Windows 10
           Product: Wine
           Version: 6.17
          Hardware: x86-64
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdiplus
          Assignee: wine-bugs at winehq.org
          Reporter: madewokherd at gmail.com
      Distribution: ---

We had some new test failures appear in Windows 10 on November 2.

https://test.winehq.org/data/20f1a677b664b3d0d3dc038ffb9ab4f4e4aa6274/win21H1_cw-rx460-21H1-32/gdiplus:graphics.html
https://test.winehq.org/data/20f1a677b664b3d0d3dc038ffb9ab4f4e4aa6274/win21H1_cw-rx460-21H1-32/gdiplus:graphicspath.html

It appears that Pen objects with a width of 0.0 and a unit of UnitPixel now
draw with 1.0 width. Previously, they did not draw.

Pen objects with UnitWorld would always draw with a minimum width of 1.0, so
possibly this brings other units' behavior in line with UnitWorld.

The C# and C++ wrappers only allow creating Pen objects with UnitWorld, other
units can only be used through the C API.

We also had the following Mono tests start failing around the same time:
MonoTests.System.Drawing.PenTest:Constructor_Brush_Float_Negative
MonoTests.System.Drawing.PenTest:Constructor_Brush_Float_Zero
MonoTests.System.Drawing.PenTest:Constructor_Color_Float_Negative
MonoTests.System.Drawing.PenTest:Constructor_Color_Float_Zero
MonoTests.System.Drawing.PenTest:Width

In these cases, the test creates a UnitWorld Pen with width < 1.0 and expects
to get the same width back. Instead, current native gdiplus reports a width of
1.0.

I'm not sure whether we should update to this new behavior. It seems likely to
cause a regression if it applies to other units (a half-pixel Pen doesn't make
much sense, but half-inch Pen does).

-- 
Do not reply to this email, post in Bugzilla using the
above URL to reply.
You are receiving this mail because:
You are watching all bug changes.