libjpeg is a pain in the ass, especially due to Ubuntu shipping
libjpeg-turbo in jpeg8 mode as their default libjpeg, while every other
distro I checked (including debian!) ships libjpeg-turbo in jpeg6.2 mode
Thankfully stb_image.h exists - just a single header and it even
has a (much!) friendlier API.
It's not like Doom3 (or any of the mods I checked) actually use JPEGs,
but I'm sure if I'd drop support completely, someone would complain
(perhaps rightfully so).
When selecting a texture in Inspectors -> Media -> Textures that doesn't
really exist (.mtr defines it, but referenced image files are missing),
the game/editor used to crash.
The problem was that somehow people thought the best way to communicate
that a file wasn't found was by setting the timestamp to 0xFFFFFFFF
and then checking for that - sometimes (incorrectly) by comparing it to -1.
That worked for 32bit ID_TIME_T (typedefed to time_t), but not with 64bit
time_t, which now seems to be the default for Win32 in VS.
So I replaced a few -1 and 0xFF... with FILE_NOT_FOUND_TIMESTAMP and now it
works.
FILE_NOT_FOUND_TIMESTAMP is still defined as 0xFFFFFFFF, maybe I should
change that, unsure if that'd break anything though..
When changing it one should keep in mind that time_t might still be 32bit
on some platforms (Linux x86?) so that should still work.. (-1 could work)
Because Debian Squeeze's libjpeg6 didn't have jpeg_mem_src(), we added
jpeg_memory_src() to provide the functionality.
This shouldn't be needed anymore and without it we can drop libjpeg code
from our repo.
Fixes#110
Found another copy in renderer/Cinematic.cpp. Move the
newer implementation from renderer/Image_files.cpp in its
own file and use the libjpeg v8c license blob (which is where
this code comes from).
Adapt README too with the v8c license.
This function only exists starting with libjpeg8.
Check for existence and provide an implementation if necessary.
This allows libjpeg6 to be used.
Code borrowed from libjpeg8, adapt copyright in README
accordingly.
Don't include the lazy precompiled.h everywhere, only what's
required for the compilation unit.
platform.h needs to be included instead to provide all essential
defines and types.
All includes use the relative path to the neo or the game
specific root.
Move all idlib related includes from idlib/Lib.h to precompiled.h.
precompiled.h still exists for the MFC stuff in tools/.
Add some missing header guards.
The unused WriteLossless() was using libjpeg internals found in
jpegint.h. This header is available with libjpeg8, but not shipped
by most distros. Disable the relevant code - no functional
changes.
