Re: Problem with Gorm

[Germán Arias]

If the problem disappears with "debug=yes". Could be the cause a code
line inside a #ifdef DEBUG? A code line that should be outside of that
ifdef?

On lun, 2011-07-04 at 10:41 +0200, Fred Kiefer wrote:
> Which backend are you using? That will result in different methods being 
> called next and most likely the problem is one level deeper.
> 
> 
> I had a quick look into these new methods and didn't like too much what 
> I saw there. We have a lot of code duplication between these two 
> methods, but we also have differences there which I don't understand. 
> Why do we use scaling for the native drawing but not for the gui drawing?
> Anyway, the code in native drawing should not check for 
> isDrawingToScreen. When drawing to a PDF or PostScript surface we should 
> be able to composite or dissolve, we just need to package that up 
> correctly as backend operations. And of course need to have the PS and 
> PDF context report back that they are able to support this.
> 
> I also noticed that the new code wont fill the cached image rep with the 
> image background colour. Why isn't this done and does this match the 
> Cocoa behaviour?
> Why does the old code (guiDrawInRect:...) use PSgsave and PSgrestore 
> around the cache drawing? We wont do any other operations on the cache 
> and don't need to restore the old state.
> 
> I think that we should start a discussion about this whole drawing code. 
> Hopefully we end up with a deeper understanding of what should happen 
> here and will then be able to package it up with a nice and clean call 
> to the backend and three or four (almost?) correct implementations for 
> this in GSContext, GSStreamContext and GSCairoContext. But then I may be 
> completely wrong here, as I really don't understand much of this new code.
> 
> On 03.07.2011 01:49, Germán Arias wrote:
> > Well, after compiling gui with "debug=yes" all works fine. But then,
> > recompiling gui just with "make" the problem is there again.
> >
> >
> > On sáb, 2011-07-02 at 11:36 -0600, Eric Wasylishen wrote:
> >> Hey German,
> >> I wasn't able to reproduce that in Gorm or Gemas, but it looks like it's 
> >> coming from code I've worked on lately...
> >> Frame 1 of the backtrace is just the line which redirects -drawInRect: to 
> >> -guiDrawInRect:, but frame 0 has no debug info. Would you be able to 
> >> recompile -gui (and maybe -back as well) with debugging on (just make 
> >> clean and make debug=yes), and see if it you can get a better backtrace? 
> >> Thanks.
> >> Eric
> >>
> >>
> >> On 2011-07-01, at 4:20 PM, Germán Arias wrote:
> >>
> >>> When I select "Containers Palette" the app crash. The backtrace is:
> >>>
> >>> Program received signal SIGSEGV, Segmentation fault.
> >>> [Switching to Thread 0xb669fb30 (LWP 6463)]
> >>> 0x0847ac03 in ?? ()
> >>> (gdb) backtrace
> >>> #0  0x0847ac03 in ?? ()
> >>> #1  0xb7344734 in -[NSImage drawInRect:fromRect:operation:fraction:] (
> >>>     self=0x86385f8, _cmd=0xb759a358, dstRect=
> >>>         {origin = {x = 0, y = 0}, size = {width = 0, height = 0}},
> >>> srcRect=
> >>>         {origin = {x = 0, y = 0}, size = {width = 0, height = 0}},
> >>>     op=NSCompositeSourceOver, delta=1) at NSImage.m:1297
> >>> #2  0xb73405dd in -[NSImage drawAtPoint:fromRect:operation:fraction:] (
> >>>     self=0x86385f8, _cmd=0xb759a320, point={x = 0, y = 0}, srcRect=
> >>>         {origin = {x = 0, y = 0}, size = {width = 0, height = 0}},
> >>>     op=NSCompositeSourceOver, delta=1) at NSImage.m:925
> >>> #3  0xb7344650 in -[NSImage
> >>> compositeToPoint:fromRect:operation:fraction:] (
> >>>     self=0x86385f8, _cmd=0xb759a2d0, aPoint={x = 0, y = 9}, srcRect=
> >>>         {origin = {x = 0, y = 0}, size = {width = 0, height = 0}},
> >>>     op=NSCompositeSourceOver, delta=1) at NSImage.m:864
> >>> #4  0xb73402a1 in -[NSImage compositeToPoint:operation:]
> >>> (self=0x86385f8,
> >>>     _cmd=0xb756f658, aPoint={x = 0, y = 9}, op=NSCompositeSourceOver)
> >>>     at NSImage.m:811
> >>> #5  0xb72df7dc in -[NSCell drawInteriorWithFrame:inView:]
> >>> (self=0x8600bf0,
> >>>     _cmd=0xb756f668, cellFrame=
> >>>         {origin = {x = 0, y = 0}, size = {width = 9, height = 9}},
> >>>     controlView=0x86393f0) at NSCell.m:2031
> >>> #6  0x086385f8 in ?? ()
> >>> #7  0xb756f658 in _OBJC_SELECTOR_TABLE ()
> >>>    from /usr/GNUstep/Local/Library/Libraries/libgnustep-gui.so.0.21
> >>> ---Type<return>  to continue, or q<return>  to quit---
> >>> #8  0x00000000 in ?? ()
> >>> (gdb)
> >>>
> >>> FisicaLab also crash, when you open the help panel, with a similar
> >>> backtrace.
> 
> 
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