Printing issues

[Gehad Elrobey]

On Mon, Aug 31, 2015 at 10:56 AM, Lubomir I. Ivanov <neolit123 at gmail.com>
wrote:

> On 30 August 2015 at 21:43, Miika Turkia <miika.turkia at gmail.com> wrote:
> > I seem to be having some trouble when trying to print preview my logs.
> > When doing this in color, I run out of memory. And when print
> > previewing in black and white the profile is quite interesting, as
> > shown below (this was 6/page). I suppose there should be some special
> > handling when printing a couple of hundred dives in one go.
> >
> > 60 dives works ok, but that is quit slow freezing the whole UI in the
> > process. But the resulting profiles look OK both B&W and in color.
> >
>
> i'm able to print the 200+ dives in the following divelist (attached
> XML) fine in color, but i can get it to crash in b&w mode.
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0d095a6d in QRasterPlatformPixmap::createPixmapForImage (this=0x42ca8e88,
>     sourceImage=..., flags=..., inPlace=false) at
> image\qpixmap_raster.cpp:366
> 366     image\qpixmap_raster.cpp: No such file or directory.
> (gdb) bt
> #0  0x0d095a6d in QRasterPlatformPixmap::createPixmapForImage (
>     this=0x42ca8e88, sourceImage=..., flags=..., inPlace=false)
>     at image\qpixmap_raster.cpp:366
> #1  0x0d094f77 in QRasterPlatformPixmap::fromImage (this=0x42ca8e88,
>     sourceImage=..., flags=...) at image\qpixmap_raster.cpp:139
> #2  0x0d0950aa in QRasterPlatformPixmap::copy (this=0x42ca8e88, data=
> ...
>
> #28 0x34874e9c in QWebFrame::render (this=0x3cb07990, painter=0x288b74,
>     layer=..., clip=...) at WebKit\qt\WidgetApi\qwebframe.cpp:646
> #29 0x00494ca3 in Printer::render (this=0x3ca5cc58, Pages=299)
>     at C:\dev\subsurface\printer.cpp:154
> #30 0x004957e5 in Printer::print (this=0x3ca5cc58)
>     at C:\dev\subsurface\printer.cpp:241
>
> the crash is somewhere deep in Qt, but it's due to the actual
> Printer::render().
>
> i also get thousand instances of these two warnings in GDB, but not in
> the standard console:
>
> QFont::setPointSizeF: Point size <= 0 (0.000000), must be greater than 0
> QTransform::fromTranslate with NaN called
>
> Gehad, you can check if you are allocating a lot of objects and if
> such can be freed in the appropriate location (try re-using objects,
> etc.), but if these are Qt memory leaks and bugs it's a much more
> complicated situation.
>
> also, since we are doing some "hacks" to be able to b&w print, i'm
> considering the proposal to remove the b&w print completely if that's
> the only *real* problematic mode!
> please, let me know if that's the case.
>
>
Miika, has reported that the same problem took place when printing in
colors as well, I didn't get to test the code with your xml log yet, I will
look into this later today.

-- 
regards,

Gehad
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