Export dives to UDDF file

This patch implements exporting dives from Subsurface to UDDF format.
Events and cylinder info are the most remarkable things still missing
from the export.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Add macros for text sizes

This replaces the hardcoded sizes all over the sources.

Make the size in the text_render_options_t a double - With this you can
compile Subsurface with

make CLCFLAGS=-DTEXT_SCALE=1.5

and the fonts in the profile are 50% bigger. Very nice on a high-pixel
density display.

Also remove the unused text_render_options for event text.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Color print: Show SAC lines in a color different from white

Also make the profile border color the same as the depth grid color.

Fixes #97

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Print dialog: Fix inaccessible controls on Windows

The window which holds the custom print options tab appears to have
unchangeable dimensions on Windows OS (unless hacked in some way).
This makes the sliders in the custom tab not accessible unless
we add the entire dialog into a GtkScrolledWindow and return that
for the "create-custom-widget" event.

The patch also makes the contents of the "Layout Options" frame
packed vertically (with a GtkVBox) instead of horizontally, so that
the entire tab contents are "mostly" scrollable vertically instead
of horizontally.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Gases and events support for UDDF export

This patch generates a gases section on UDDF export. The section
consists of all the unique gas mixes sawn on the dive log.

The latter part includes events to the export. Gas change and heading
events are properly translated to respective UDDF naming. Other events
are copied over as is. Some of the events are the same (ascent, deco,
rbt, surface) in UDDF some are not available.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Fix pressures on UDDF export

Examples on UDDF specification indicate that pressures are reported in
Pascal. Also prefer the sample data from first dive computer for start
and end tank pressures.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Fix end pressure on DLD export

While working on UDDF export I noticed that the grabbing of last
sample pressure was not working properly. This will fix it for DLD
export.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
B/W Print: Make sure that all colors are monochrome

Some colors such as the ones for ceiling were still green on B/W
print. This patch makes all colors in the second row
of profile.c:profile_color monochrome.

Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Check if DLD contains non-ascii characters

Valid divelogs.de export might contain non-ascii characters in CDATA
fields as long as these characters are found in iso-8859-1. So we'll
have to test to make sure the content is fully ascii before calling
xmlStringLenDecodeEntities to decode possible character references.

Acked-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>