[Mono-bugs] [Bug 61964][Nor] New - System hangs when drawing text to a bitmap

bugzilla-daemon@bugzilla.ximian.com bugzilla-daemon@bugzilla.ximian.com
Mon, 26 Jul 2004 14:52:43 -0400 (EDT)


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Changed by cnuernberger@extendthereach.com.

http://bugzilla.ximian.com/show_bug.cgi?id=61964

--- shadow/61964	2004-07-26 14:52:43.000000000 -0400
+++ shadow/61964.tmp.6207	2004-07-26 14:52:43.000000000 -0400
@@ -0,0 +1,79 @@
+Bug#: 61964
+Product: Mono: Class Libraries
+Version: unspecified
+OS: GNU/Linux [Other]
+OS Details: Gentoo 
+Status: NEW   
+Resolution: 
+Severity: Unknown
+Priority: Normal
+Component: Sys.Drawing.
+AssignedTo: mono-bugs@ximian.com                            
+ReportedBy: cnuernberger@extendthereach.com               
+QAContact: mono-bugs@ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: System hangs when drawing text to a bitmap
+
+Please fill in this template when reporting a bug, unless you know what you
+are doing.
+Description of Problem: Computer hangs.  It appears the libgdi stuff is
+hanging when drawing to a bitmap.
+
+
+Steps to reproduce the problem:
+1. Run program listed below
+============================================================
+using System;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+using System.Drawing.Imaging;
+class TestMain
+{
+	public static void Main()
+	{
+		Image img = new Bitmap( 300, 300,
+PixelFormat.Format32bppPArgb );
+		Graphics graphics = Graphics.FromImage( img );
+		// Get an array of the available font families.
+		FontFamily[] families = FontFamily.GetFamilies(graphics);
+		// Draw text using each of the font families.
+		Font familiesFont;
+		string familyString;
+		float spacing = 0;
+		foreach (FontFamily family in families)
+		{
+			try 
+			{
+				familiesFont = new Font(family, 16,
+FontStyle.Bold);
+				familyString = "This is the " + family.Name
++ "family.";
+				graphics.DrawString(
+					familyString,
+					familiesFont,
+					Brushes.Black,
+					new PointF(0, spacing));
+				spacing += familiesFont.Height;
+			}
+			catch ( Exception e )
+			{
+			}
+		}
+		img.Save( "test.png", ImageFormat.Png );
+	}
+}
+================================================================
+Actual Results: System hung
+
+
+Expected Results: An image where the program was run with a white
+background and with text naming the font family on each line.
+
+
+How often does this happen?  Every time.
+
+
+Additional Information: This also happens when someone tries to calculate
+the needed size of a text item, the Graphics.MeasureString method.