When the Ex memory regions are close to full, it is possible for
the game to fail to purge objects and then crash with an OOM error
even if it isn't actually out of memory. This patch calculates the
amount of free memory truly needed when allocating to Ex memory to
allow exactly the entire frame & text regions to be used, instead
previously where a hard-coded amount of free space to maintain was
used, which guaranteed that the entire memory region could not
actually be used by the game.
This change may be masking some underlying memory leak, or it may
just be that near the end of the game the game naturally comes
close to reaching the maximum memory region size. For the moment,
I am assuming the latter.
This commit also adds some assertion checks to the memory transfer
functions to make sure the regions don't quietly overflow in other
cases, since pickupConts performs transfers in a manner that
doesn't ensure enough free memory exists for them to be successful.
Fixes Trac#6820.
Since lua_pushlightuserdata and lua_touserdata operate on (void *)
values, it is tricky to fix these warnings "correctly" without looking
at invasive changes to a significant amount of Lua internal code.
Since these pointers to consts are already being recast to drop the
const qualifications, then removing the const on the underlying value
declaration does not further expose this to change and stops the
compiler warnings associated with this.
Anyone with a better fix for this can restore the const
qualifications later.
Due to the need to calculate the audio duration with millisecond
precision from the file size, it is possible to overflow a 32-bit
integer in games with long background audio loops, like RAMA,
during the calculation of the duration.
It is also not necessary to give some framerate here, so eliminate
the unnecessary explicit Timestamp construction with the second
argument.
The game reads until it sees 0xFF, which is not until frame 14 for
some animations in the first interactive room of the game. This
happened to work previously because the struct is packed so it
would read into the b31.. members, but this was still technically
an out-of-bounds read.
Since those GraphcisManager initialize the cursor position to (0,0) when
created the cursor was jumping to the top left corner and then moving
back to its initial position as soon as the mouse was moved. Now it
stays at its initial position.
There are still some issues with it when changing between OpenGL and
SurfaceSDL at the same time as toggling fullscreen. But it is not worse
than before.
If we do not update the area below the message, it is just blitted on top
of itself again and again and gets progressively less transparent. It also
causes artefacts when the mouse pass below the OSD message.
Willem Jan Palenstijn
Bastien Bouclet
Eugene Sandulenko
Paul Gilbert
Colin Snover
Thierry Crozat
D G Turner
Walter van Niftrik
Ben Castricum
Filippos Karapetis