When widget::draw() is called it asks the ThemeEngine to redraw the background
first and then the widget gets redrawn in drawWidget(). The ThemeEngine uses
an extended rect to restore the background to include bevel and shadow effects.
However if this extended rect overlaps with other widgets, since those other
widgets are not redrawn, a part of those will be missing. See for example
bug #6394: GUI: List View save page drawns over font.
In case we get overlap we might need to change the way widgets are drawn so
that all widgets intersecting the area where the backgroud is restored are
redrawn. This commit simply seperate the bevel and shadow effects, and uses
the shadow offset only to extend the bottom and right sides of the rectangle
(while the bevel offset is still used to extend all four sides). This
results in a smaller extended rectangle (if the shadow offset is bigger than
the bevel offset, which is the case of the list view) and thus decrease the
risk of the issue happening. The particular cases described in bug #6394
are all fixed with this change.
This fixes at least the character selection screen in QFG4CD,
where the sound for the torches is supposed to loop, but wasn't
because kDoSoundSetLoop would bail out before setting the loop
property on the soundObj.
Upon investigation of Sound code across SCI32 games, it was
determined that there are actually (at least) 3 different
revisions, not just a single SCI2.1 version. This patch only
changes the parts of Sound code that are relevant to the correct
use of Audio32.
Fixes Trac#9736, Trac#9756, Trac#9767, Trac#9791.
The previous code for attenuating audio channels was not accurate,
so samples were quieter than they were supposed to be when mixed
together. Robots were also being mixed without attenuation, which
was incorrect.
This is done for consistency so that all the games in the Magic Tales
series are named in a consistent way. This is also how they are named
on the wiki (and on amazon).
