[PULL REQUEST] initial profile printing support

[Tomaz Canabrava]

Lubomir,

As soon as I recover from the dives that I did this weekend ( fever, I
think I got a bit of Insulation) I'll speed up things, I already see a few
ways to speed things up. =)

Tomaz
Em 13/07/2013 12:57, "Lubomir I. Ivanov" <neolit123 at gmail.com> escreveu:

> the first two patches make fixes related to the table print. the page
> detection
> algorithm is now even slower..
>
> the rest of the series add experimental profile printing support.
> it can be accessed for now only via the '6 dives' option and what it does
> at the moment is to print each dive profile on a full page instead.
>
> grayscale printing is now supported both profile-internally and via bitmap
> coversation to grayscale (experimental). it's under question which one of
> the
> two methods is faster, but also which looks better. the profile-internal
> method gives more control, of course, as it reads the grayscale colors
> from the profile_colors[] table.
>
> in terms of performance both the table print and profile printing are
> much slower in comparison to the GTK build...
>
> QTextDocument aside (table printing), i can understand if QGraphicsScene
> is much more sophisticated than cairo, but under the Ubuntu VM here,
> by browsing the divelist it can take >3 seconds, where with GTK/cairo it
> took
> ~0 seconds. if you have a fast machine you may not notice this at all,
> but under a VM you may be measuring with something like a 1.5GHz single
> core.
>
> also if you test the new profile printing you may notice a blocking
> operation
> of N seconds, while all profiles are rendered. ~42 dive profiles, full page
> 300 DPI on A4, in color take ~16 seconds on my end.
>
> not sure if performance is much of an issue here..
>
> ---
> The following changes since commit
> a69e92d891726e7aa75024d313ec2295faa7cc72:
>
>   About: improve dialog layout (2013-07-11 09:22:20 -0300)
>
> are available in the git repository at:
>
>   git at github.com:neolit123/subsurface.git print
>
> for you to fetch changes up to b5ed72a705481b69b3d3459be8a747356f297f2c:
>
>   Colors: a couple of grayscale color tweaks (2013-07-13 18:31:22 +0300)
>
> ----------------------------------------------------------------
> Lubomir I. Ivanov (9):
>       Print: support any resolution for the table print
>       Print: improve new page detection in table print
>       Profile: use a printMode flag in ProfileGraphicsView
>       Print: add experimental code for printing profiles
>       Print: add method to convert profile to grayscale
>       Profile: add the isGrayscale flag
>       Print: pass grayscale flag to setPrintMode()
>       Profile: support grayscale plotting
>       Colors: a couple of grayscale color tweaks
>
>  qt-ui/graphicsview-common.cpp |  5 +--
>  qt-ui/printdialog.cpp         |  1 +
>  qt-ui/printlayout.cpp         | 88 +++++++++++++++++++++++++++++++++-----
>  qt-ui/printlayout.h           |  1 +
>  qt-ui/profilegraphics.cpp     | 98
> ++++++++++++++++++++++++++-----------------
>  qt-ui/profilegraphics.h       | 10 ++++-
>  6 files changed, 150 insertions(+), 53 deletions(-)
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