[Mono-dev] System.Drawing.Graphics exceptions

[Sebastien Pouliot]

On Tue, 2009-07-14 at 14:29 -0500, Jon_James at Dell.com wrote:
> Hi Sebastien,
> 
> I'm able to login and open applications if that's what you're asking.
> Can you give me a test to try out?  

What's the output of xdpyinfo ?

> I can open gedit from console if that's what you're asking.

gedit is a GTK application. Do you have any (GUI) mono-based
applications running on that box ? if so which ones ?

> FYI: this is on RHEL5.3 64 bit.
> 
> Jon
> 
> -----Original Message-----
> From: Sebastien Pouliot [mailto:sebastien.pouliot at gmail.com] 
> Sent: Tuesday, July 14, 2009 2:22 PM
> To: James, Jon
> Cc: mono-devel-list at lists.ximian.com
> Subject: Re: [Mono-dev] System.Drawing.Graphics exceptions
> 
> Hello Jon,
> 
> The exception from your previous email* shows the problem:
> 
>         [root at localhost BTOAD]# mono RMScreenShot.exe test.jpg
>         >             BTOStudio RM Client ScreenShot Utility
>         < ERROR >     Fatal Error: System.NotImplementedException: 0bbp
>         depth not
>         supported.
> 
> So for some reason (is X running? remote access??) the current visual
> returns 0bbp which is unusable to create a screenshot. 
> 
> Are you able to run GUI (e.g. SWF) apps from your terminal session ?
> 
> Sebastien
> 
> * please note that this is a mailing-list, even if you're using it like
> a forum with nabble. As such it can be difficult to read your email
> thread if you don't include the text from previous one.
> 
> On Tue, 2009-07-14 at 11:37 -0700, Jon James wrote:
> > -bump-
> > 
> > Any thoughts around this problem?  I've gone through the
> > system.drawing.graphics source code. I'm thinking there is an issue with
> > this line:
> > 
> > 240: Bitmap bmp = new Bitmap (blockRegionSize.Width,
> > blockRegionSize.Height);  or the visual object that is created in the
> > method.  
> > 
> > or these lines:
> > 
> > 229: XVisualInfo visual = new XVisualInfo ();
> > 
> > /* Get XVisualInfo for this visual */
> > visual.visualid = GDIPlus.XVisualIDFromVisual(defvisual);
> > vPtr = GDIPlus.XGetVisualInfo (GDIPlus.Display, 0x1 /* VisualIDMask */, ref
> > visual, ref nitems);
> > visual = (XVisualInfo) Marshal.PtrToStructure(vPtr, typeof (XVisualInfo));
> > 
> > /* Sorry I do not have access to a computer with > deepth. Fell free to add
> > more pixel formats */	
> > image = GDIPlus.XGetImage (GDIPlus.Display, window, sourceX, sourceY,
> > blockRegionSize.Width,
> > 	blockRegionSize.Height, AllPlanes, 2 /* ZPixmap*/);
> > 				
> > Bitmap bmp = new Bitmap (blockRegionSize.Width, blockRegionSize.Height);
> > 	int red, blue, green;
> > 		for (int y = 0; y < blockRegionSize.Height; y++) {
> > 			for (int x = 0; x < blockRegionSize.Width; x++) {
> > 				pixel = GDIPlus.XGetPixel (image, x, y);
> > 
> > 				switch (visual.depth) {
> > 					case 16: /* 16bbp pixel transformation */
> > 						red = (int) ((pixel & visual.red_mask ) >> 8) & 0xff;
> > 						green = (int) (((pixel & visual.green_mask ) >> 3 )) & 0xff;
> > 						blue = (int) ((pixel & visual.blue_mask ) << 3 ) & 0xff;
> > 						break;
> > 					case 24:
> > 					case 32:
> > 						red = (int) ((pixel & visual.red_mask ) >> 16) & 0xff;
> > 						green = (int) (((pixel & visual.green_mask ) >> 8 )) & 0xff;
> > 						blue = (int) ((pixel & visual.blue_mask )) & 0xff;
> > 						break;
> > 					default:
> > 						string text = Locale.GetText ("{0}bbp depth not supported.",
> > visual.depth);
> > 						throw new NotImplementedException (text);
> > 				}
>