[Mono-bugs] [Bug 349800] New: Exception in FromUnManagedMemoryToPoint (IntPtr prt, PointF [] pts)
bugzilla_noreply at novell.com
bugzilla_noreply at novell.com
Wed Dec 19 09:52:03 EST 2007
https://bugzilla.novell.com/show_bug.cgi?id=349800
Summary: Exception in FromUnManagedMemoryToPoint (IntPtr prt,
PointF [] pts)
Product: Mono: Class Libraries
Version: 1.2.4
Platform: All
OS/Version: All
Status: NEW
Severity: Major
Priority: P5 - None
Component: Sys.Drawing.
AssignedTo: mono-bugs at ximian.com
ReportedBy: nikki at trumphurst.com
QAContact: mono-bugs at ximian.com
Found By: Customer
The code for FromUnManagedMemoryToPoint (IntPtr prt, PointF [] pts) contains
the following typo:
pts[i] = (PointF) Marshal.PtrToStructure(pos, typeof(Point));
which is obviously wrong (you can't cast a Point to a PointF)
Perhaps it should read:
pts[i] = (PointF) Marshal.PtrToStructure(pos, typeof(PointF));
or maybe it should be:
Point p = Marshal.PtrToStructure(pos, typeof(PointF));
pts[i] = new PointF(p.X, p.Y);
(depending what is actually in prt, two floats or two ints)
The existing code throws an exception when you call any method that uses this
e.g.
void Transform(Graphics g, PointF [] transformed) {
g.TransformPoints(System.Drawing.Drawing2D.CoordinateSpace.Page,
System.Drawing.Drawing2D.CoordinateSpace.Device, transformed);
}
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