Commit graph

61 commits

Author SHA1 Message Date
Christoph Oelckers
a03b947729 - WildMidi generally working, some cleanup left to do... 2015-11-28 20:58:14 +01:00
Christoph Oelckers
dccd35ef29 - uncoupled OpenAL music updates from UpdateSounds.
UpdateSounds will not be called during screen wipes and the entire setup of this function suggests that this is not advisable at all.
The OpenAL stream updates were done deep inside this function implicitly.
This caused music to stop while a wipe was in progress. So in order to allow uninterrupted music playback during screen wipes the music updates need to be handled separately from sound updates and be called both in the main loop and the wipe loop.

I think that the OpenAL music updating should be offloaded to a separate thread but at least it's working now without causing interruptions during wipes.
2015-04-25 10:26:14 +02:00
Chris Robinson
ff6eb6df5c Merge remote-tracking branch 'zdoom/master' into openal
Conflicts:
	src/s_sound.cpp
2014-09-09 14:45:53 -07:00
Randy Heit
449a17c2f4 Correctly assign the sample rate for all Blood SFX formats
- Blood can do 44100 Hz sounds!
2014-07-29 21:09:29 -05:00
Chris Robinson
1a40c95f84 Rename some FMOD references to be generic sound system
Since they relates to other sound backends as well, there's no need to single
out FMOD in these places.
2014-06-26 16:58:18 -07:00
Randy Heit
1b9c71b252 - Added S_ChangeSoundVolume() to change the volume of an already playing sound, accessible
through the new ACS function SoundVolume.

SVN r4318 (trunk)
2013-06-01 17:46:50 +00:00
Randy Heit
971eca7d61 - Fixed: Player sounds that explicitly use dsempty will now properly silence the sound instead of
looking for a more audible version.

SVN r3938 (trunk)
2012-11-03 03:43:05 +00:00
Randy Heit
0ac94c5265 - Precache player sounds at level load.
SVN r3841 (trunk)
2012-08-22 23:46:47 +00:00
Randy Heit
625482aaeb - Added actors' BounceSound, WallBounceSound, and CrushPainSound to preloading.
- Moved marking of actor sounds for precaching into a virtual Actor function.

SVN r3838 (trunk)
2012-08-22 23:17:49 +00:00
Randy Heit
45027e4620 - Added SNDINFO $attenuation command. This multiplies the attenuation passed to S_Sound. e.g.
$attenuation Boom 0
  Will make the "Boom" sound play with 0 attenuation, or in other words, at full volume throughout
  the level.

SVN r3629 (trunk)
2012-05-07 01:16:56 +00:00
Randy Heit
1579fd1c1c - Fixed: Selecting TiMidity++ as a MIDI device without a working timidity.exe, then switching to a different MIDI device would leave music silent until a new song was started.
(The discrepancy between mus_playing.handle and currSong is one which should probably be handled properly at some point.)

SVN r3212 (trunk)
2011-05-20 00:26:22 +00:00
Christoph Oelckers
f0f17e531c - move static AM color initialization into the AM_StaticInit function.
- move D_LoadWadSettings to keysections.cpp.
- made some more data reloadable.
- data structures filled by P_SetupLevel should be cleared before loading the level. They can remain non-empty in case of an error. There's probably more to fix here...
- fixed: MidiDevices and MusicAliases were not cleared before reloading local SNDINFOs.
- fixed signed/unsigned warnings in AddSwitchPair for real (GCC really allows -1u? MSVC prints a warning for that.)


SVN r3036 (trunk)
2010-12-14 00:50:02 +00:00
Christoph Oelckers
2fcf1af21b - added a $musicalias command to SNDINFO that allows remapping of music tracks. Mapping to 'none' means that starting the remapped song will have no effect at all. There's one limitation though: If you load a WAD with the same music name after the one with the SNDINFO lump the mapping will be ignored. This is so that music resources can use this command without interfering with WADs that replace the music with their own.
SVN r3002 (trunk)
2010-11-08 17:24:27 +00:00
Christoph Oelckers
e2c105b447 - fixed: XMI music files were not converted for playback with FMod or Timidity++.
- Was there any reason why the MIDI_GUS device was so well hidden from the user? It sure does not sound broken. Added it to MIDI menu and $mididevice.


SVN r2862 (trunk)
2010-09-29 00:35:47 +00:00
Christoph Oelckers
eed5812799 - added 'fluidsynth' option for $mididevice command.
SVN r2598 (trunk)
2010-08-26 16:46:01 +00:00
Randy Heit
99a2014ead - Added support for custom loop points for songs. This does not work with MP3 because of the
way MP3 obfuscates custom tags. Vorbis and FLAC are fine. (I could make it work with MP3,
  but you should be using Vorbis instead.) They are:
  * LOOP_START: Start time for the loop. If omitted, the song repeats from the beginning.
  * LOOP_END: End time for the loop. If omitted, the song loops at the end. (If you need to specify this, why aren't you using a shorter song.)
  You only need to specify one of these tags to set the custom loop. Naturally, you can set
  them both, as well. The format for each tag is the same:
  * If it contains a colon (:), it specifies by time. This may be of the form 00:00:00.00
    (HH:MM:SS.ss) to specify by play. Various parts may be left off. e.g. To start the loop
    at 20 seconds in, you can use ":20", 0:20", "00:00:20", ":20.0", etc. Values after the
    decimal are fractions of a second and accurate to one millisecond.
  * If you don't include a colon but just have a raw number, then it's the number of PCM
    samples at which to loop.
  * Any characters other than digits (0-9), colons (:), or a single decimal point for the
    seconds portion will result in the tag being ignored.

SVN r2424 (trunk)
2010-07-10 02:59:34 +00:00
Christoph Oelckers
4d86ebddf9 - Added support for Risen3D/PrBoom+'s MUSINFO lump.
SVN r2366 (trunk)
2010-06-13 08:47:38 +00:00
Randy Heit
740d52cf5b - Added support for Blood's SFX loop start markers.
SVN r2221 (trunk)
2010-03-18 04:26:22 +00:00
Randy Heit
c079a3ea5b - Add more parameters to the ambient sound things:
* Second argument: Volume scalar. 0 and 128 are normal volume. (Where "normal" is whatever
    it was defined with in SNDINFO.) Other values scale it accordingly.
  * Third argument: Minimum distance before volume fading starts.
  * Fourth argument: Maximum distance at which the sound is audible. Setting either of these to 0
    will use whatever they were defined with in SNDINFO.

SVN r2214 (trunk)
2010-03-18 00:32:35 +00:00
Christoph Oelckers
6c9748b603 - ported a few cleanup changes from Gez's recent GZDoom patch.
- fixed: The sound channel structure should not store the sound table's entries' addresses which are stored in a TArray by pointer. In case the array gets reallocated very bad things can happen. This caused some bad crashes when GZDoom's FraggleScript implementation created new sound entries.


SVN r2114 (trunk)
2010-01-16 07:51:50 +00:00
Randy Heit
fb74d9b1ec - Added virtual status and audibility to the noise debug display.
SVN r1961 (trunk)
2009-11-04 02:07:39 +00:00
Randy Heit
466b6e4535 - Moved SetSoundPaused() out of i_input.cpp and into s_sound.cpp.
SVN r1598 (trunk)
2009-05-23 03:09:50 +00:00
Randy Heit
749de6c156 - Fixed: SetSoundPaused() still needs to call S_PauseSound() to pause music
that isn't piped through the digital sound system. (Was removed in r1004.)


SVN r1595 (trunk)
2009-05-20 02:52:07 +00:00
Christoph Oelckers
4b064d9b5d - Added a range parameter to SNDINFO's $limit.
- Restored Dehacked music name replacement.


SVN r1416 (trunk)
2009-02-08 11:28:30 +00:00
Randy Heit
cbe0c57911 - Removed S_MarkSoundChannels(), as it caused all non-actor sounds to
have their origins zeroed during collections.
- WI_drawLF() now draws the level name at the top of the screen, always.


SVN r1296 (trunk)
2008-11-27 18:46:09 +00:00
Randy Heit
3b4479df44 - Removed GC barriers from the sound channels. If we must, we can always
do it the old way and scan every channel to see if it matches an actor/
  entchannel pair.
- Fixed: S_RelinkSounds() did not move the SoundChans bitfield to the new
  actor.
- Fixed: Stolen channels could be kept around by the high-level channels
  indefinitely.


SVN r1289 (trunk)
2008-11-15 01:01:04 +00:00
Christoph Oelckers
a8a3aca601 - Added read and write barriers to the actor pointer in the sound channel
structure.
- Fixed: Items which should stay but had an IF_ALWAYSPICKUP flag were removed.
- Fixed: The pickup flash must only play when an item is picked up so the 
  correct place to spawn it is in AInventory::Touch, not in AInventory::GoAway.


SVN r1278 (trunk)
2008-10-26 17:06:47 +00:00
Christoph Oelckers
d1f8518a79 - Separated low level sound code from all high level dependencies.
SVN r1228 (trunk)
2008-09-15 18:18:04 +00:00
Christoph Oelckers
5d9483b632 - Moved some more high level sound logic out of FMODSoundRenderer:
The rolloff and channel ended callbacks now call functions in s_sound.cpp
  instead of working on the data itself and GSnd->StopSound has been replaced
  with S_StopChannel.


SVN r1227 (trunk)
2008-09-15 16:02:05 +00:00
Christoph Oelckers
db5723997c - Cleaned up some include dependencies.
SVN r1224 (trunk)
2008-09-14 23:54:38 +00:00
Christoph Oelckers
d02097976e - Fixed: The new rolloff values being stored in FSoundChan need to be serialized
for savegames.


SVN r1209 (trunk)
2008-09-09 21:23:09 +00:00
Christoph Oelckers
e033cbf9f8 - Since loading of the sound lump is now done in S_LoadSound I added an IsNull
method to the SoundRenderer class so that this function doesn't need to 
  load the sound for the NullSoundRenderer.
- Took some more non-FMOD related code out of fmodsound.cpp, including the
  code that checks for raw and Doom sounds. This means that sfxinfo_t is no
  longer needed in the SoundRenderer class so I took out all references to it.


SVN r1208 (trunk)
2008-09-09 20:49:53 +00:00
Christoph Oelckers
3b35ad2db2 - Fixed: FMODSoundRenderer::StartSound3D must set the static variable pointing
to the rolloff information back to NULL when starting the sound fails.
- Fixed: Rolloff information was taken from the sfxinfo that contained the
  actual sound data, not the one that was used for starting the sound.



SVN r1206 (trunk)
2008-09-09 09:22:47 +00:00
Christoph Oelckers
2df65c70cb - Fixed: GetMSLength didn't resolve random and player sounds.
- Moved sound aliasing code out of fmodsound.cpp into S_LoadSound.


SVN r1203 (trunk)
2008-09-07 14:45:50 +00:00
Christoph Oelckers
bcbd2162b7 - Changed sound interface so that all references to game data like actors
and sectors are done in s_sound.cpp and not in fmodsound.cpp. Also removed
  several 'sector' parameters because they were never used inside the sound code.


SVN r1200 (trunk)
2008-09-06 11:07:27 +00:00
Randy Heit
78890d57bc - Fixed: Screenwipes now pause sounds, since there can be sounds playing
during it.
- UI sounds are now omitted from savegames.
- Fixed: Menu sounds had been restricted to one at a time again.
- Moved the P_SerializeSounds() call to the end of G_SerializeLevel() so that
  it will occur after the players are loaded.
- Added fixes from FreeBSD for 0-length and very large string buffers
  passed to myvsnprintf.


SVN r1063 (trunk)
2008-07-05 03:32:44 +00:00
Randy Heit
a3e8a0cefd - Removed the S_Sound() variant that allows for pointing the origin at an
arbitrary point. It has been replaced with a variant that takes a polyobject
  as a source, since that was the only use that couldn't be rewritten with the
  other variants. This also fixes the bug that polyobject sounds were not
  successfully saved and caused a crash when reloading the game. Note that
  this is a significant change to how equality of sound sources is determined,
  so some things may not behave quite the same as before. (Which would be a
  bug, but hopefully everything still sounds the same.)


SVN r1059 (trunk)
2008-07-01 04:06:56 +00:00
Randy Heit
d0b2c41270 - The sound code now handles restarting looping sounds itself. As far as
the rest of the game is concerned, these sounds will never stop once they
  have been started until they are explicitly stopped. If they are evicted
  from their channels, the sound code will restart them as soon as possible.
  This means that instead of this:
	if (!S_IsActorPlayingSomething(actor, CHAN_WEAPON, -1))
	{
		S_Sound(actor, CHAN_WEAPON|CHAN_LOOP, soundid, 1, ATTN_NORM);
	}
  The following is now just as effective:
	S_Sound(actor, CHAN_WEAPON|CHAN_LOOP, soundid, 1, ATTN_NORM);
  There are also a couple of other ramifications presented by this change:
    * The full state of the sound system (sans music) is now stored in save
      games. Any sounds that were playing when you saved will still be
      playing when you load. (Try saving while Korax is making a speech in
      Hexen to hear it.)
    * Using snd_reset will also preserve any playing sounds.
    * Movie playback is disabled, probably forever. I did not want to 
      update the MovieDisable/ResumeSound stuff for the new eviction
      tracking code. A properly updated movie player will use the VMR,
      which doesn't need these functions, since it would pipe the sound
      straight through the sound system like everything else, so I decided
      to dump them now, which leaves the movie player in a totally unworkable
      state.

June 26, 2008
- Changed S_Sound() to take the same floating point attenuation that the
  internal S_StartSound() uses. Now ambient sounds can use the public
  S_Sound() interface.
- Fixed: S_RelinkSound() compared the points of the channels against the
  from actor's point, rather than checking the channels' mover.
- Changed Strife's animated doors so that their sounds originate from the
  interior of the sector making them and not from the entire vertical height
  of the map.


SVN r1055 (trunk)
2008-06-29 04:19:38 +00:00
Randy Heit
9e42cdaf08 - Replaced the naive area sound implementation with one that takes into
consideration the size and shape of the sector producing the sound. See
  the lifts on Doom 2 MAP30 and compare with previous versions.
- Fixed: The stop sound for sector-based sound sequences was not played with
  the CHAN_AREA flag.
- Removed the distinction between S_Sound() and S_SoundID() functions. Use
  S_Sound() for both names and IDs from now on.


SVN r1034 (trunk)
2008-06-15 02:25:09 +00:00
Randy Heit
4a1cb412f1 - Add environment 255, 255 as a way to get the software underwater effect in
any zone you want.
- Using a too-recent version of FMOD now gives an error, since there may be
  breaking changes to the API from one version to the next (excluding
  revisions in stable branches, which only represent bug fixes).
- Updated fmod_wrap.h for FMOD 4.16 and corrected a bug that had gone
  unnoticed before: The delayhi and delaylo parameters for Channel::setDelay()
  and getDelay() were swapped.


SVN r1032 (trunk)
2008-06-12 23:47:27 +00:00
Randy Heit
5b8055bfc7 - Since KDIZD is the only mapset I know of that used reverb, and it didn't
define any new ones of its own, I'm pre-emptively renaming the SNDEAX lump
  to REVERBS to remove any possible misunderstanding that this is something
  that requires EAX hardware support. (Ideally, it would have been REVERBDEF,
  but that's 10 characters long.) The eaxedit console command has also been
  renamed to reverbedit for the same reason.
- Fixed: The Palette part of FRemapTable was not initialized with alpha values
  other than 0. I'm not sure if it would be better to fix this in the game
  palette that it copies from or not, but right now, they get set
  unconditionally to 255.

SVN r983 (trunk)
2008-05-20 04:02:49 +00:00
Randy Heit
03b4f71edf - Reduced the range that area sounds require to interpolate between 2D and
3D panning.
- The listener's velocity is now set at 0 for the sound engine. The player
  moves so fast that you can hear the doppler shift just by running around,
  otherwise.
- Changed the sound code so that all sounds that start playing on a single
  tic actually start playing at the exact same sample position.


SVN r927 (trunk)
2008-04-19 22:47:54 +00:00
Christoph Oelckers
868782a843 - Fixed: The HIRESTEX parser didn't check if a graphic specified in a remap
command actually existed.
- Fixed: My $Limit fix from yesterday didn't work because NearLimit was
  an unsigned byte and the comparisons with -1 didn't work. Made it a
  signed word instead.
- Made sfxinfo_t::Link an unsigned int because it limited the amount of 
  usable sounds to 65535. 

SVN r869 (trunk)
2008-03-30 08:32:44 +00:00
Christoph Oelckers
6420d82a58 - Fixed: After starting new music the music volume has to be reset so that
the song's relative volume takes effect.
- Removed the arbitrary 1024 bytes limit when the file being played is a MIDI
  file. I had a D_DM2TTL that's only 990 bytes.
- Restructured I_RegisterSong so that $mididevice works again and also supports
  selecting FMOD.


SVN r857 (trunk)
2008-03-27 00:05:32 +00:00
Randy Heit
aef34f9aa5 - Removed xlat_parser.h from the repository. Lemon was always being run on
xlat_parser.y because both files had the same time stamp after an update,
  and Lemon only rewrites the header file if it's changed.
- Added $volume SNDINFO command. This is multiplied with the volume the sound
  is played at to arrive at the final volume (before distance attenuation).
- Added the CHAN_AREA flag to disable 3D panning within the min distance of a
  sound. Sector sound sequences (except doors) use this flag.
- Added the CHAN_LOOP flag to replace the S_Looped* sound functions.
- Restored the sound limiting.


SVN r849 (trunk)
2008-03-25 04:42:26 +00:00
Randy Heit
84d125cf21 - Fixed: Actor-less sounds that aren't played on CHAN_AUTO should still be
subject to channel overriding.
- Re-added priority selection based on sound usage.
- Reduced the number of virtual channels to match the number of real
  channels.
- Added customizable rolloff, including Doom's standard linear gain rolloff.
  SNDINFO commands are:
    $rolloff <sound> <min distance> <max distance>          -- linear gain (like Doom)
    $rolloff <sound> linear <min distance> <max distance>   -- linear volume
    $rolloff <sound> log <min distance> <rolloff factor>    -- logarithmic
    $rolloff <sound> custom <min distance> <max distance>   -- use SNDCURVE lump
  Anything closer than min distance is full volume and anything further than
  max distance is inaudible. Logarithmic rolloff does not have a maximum
  distance; it has a scalar that controls how quickly the volume drops off
  instead.


SVN r834 (trunk)
2008-03-22 03:33:41 +00:00
Randy Heit
10920ffe75 - Removed some debug output from SBarInfo::ParseSBarInfo().
- Fixed: Heretic linetype translations included the wrong file.
- Removed all 2D sound positioning code from s_sound.cpp. Everything uses
  FMOD's 3D engine now.
- Removed all the channel selection code from s_sound.cpp. FMOD has code to
  handle this sort of thing, so let's use it.
- Replaced S_StopSoundID() with S_CheckSingular(). There is no longer a limit
  on the number of copies of a particular sound that can be playing at once,
  aside from Strife's special singular sounds. (Sorry, Heretic and Hexen.)
  Consequently, the SNDINFO $limit command is now ignored.
- Removed ATTN_SURROUND, since FMOD Ex doesn't exactly support it, and it
  only worked as intended on stereo speakers anyway.
- Cleaned out ancient crud from i_sound.cpp.


SVN r826 (trunk)
2008-03-21 05:13:59 +00:00
Randy Heit
087e34bbb3 - Fixed: The source no longer built with GCC.
- Added a cheap pitch shifting for underwater environments that should be fairly
  close to Duke's. It sounds okay for some sounds, but others like the BFG, where
  the timing of the sound actually matters, don't sound good. I shall have to
  replace it with a real pitch shifter DSP unit.


SVN r819 (trunk)
2008-03-19 23:03:14 +00:00
Randy Heit
2b721975dd VERY IMPORTANT NOTE FOR ANYBODY BUILDING FROM THE TRUNK: This commit adds support
for FMOD Ex while at the same time removing support for FMOD 3. Be sure to update
your SDKs. GCC users, be sure to do a "make cleandep && make clean" before
building, or you will likely get inexplicable errors.

- Fixed: If you wanted to make cleandep with MinGW, you had to specifically
  specify Makefile.mingw as the makefile to use.
- Added a normalizer to the OPL synth. It helped bring up the volume a little,
  but not nearly as much as I would have liked.
- Removed MIDI Mapper references. It doesn't work with the stream API, and
  it doesn't really exist on NT kernels, either.
- Reworked music volume: Except for MIDI, all music volume is controlled
  through GSnd and not at the individual song level.
- Removed the mididevice global variable.
- Removed snd_midivolume. Now that all music uses a linear volume scale,
  there's no need for two separate music volume controls.
- Increased snd_samplerate default up to 48000.
- Added snd_format, defaulting to "PCM-16".
- Added snd_speakermode, defaulting to "Auto".
- Replaced snd_fpu with snd_resampler, defaulting to "Linear".
- Bumped the snd_channels default up from a pitiful 12 to 32.
- Changed snd_3d default to true. The new cvar snd_hw3d determines if
  hardware 3D support is used and default to false.
- Removed the libFLAC source, since FMOD Ex has native FLAC support.
- Removed the altsound code, since it was terribly gimped in comparison to
  the FMOD code. It's original purpose was to have been as a springboard for
  writing a non-FMOD sound system for Unix-y systems, but that never
  happened.
- Finished preliminary FMOD Ex support.


SVN r789 (trunk)
2008-03-09 03:13:49 +00:00
Randy Heit
e5572a1c4e - Updated lempar.c to v1.31.
- Added .txt files to the list of types (wad, zip, and pk3) that can be
  loaded without listing them after -file.
- Fonts that are created by the ACS setfont command to wrap a texture now
  support animated textures.
- FON2 fonts can now use their full palette for CR_UNTRANSLATED when drawn
  with the hardware 2D path instead of being restricted to the game palette.
- Fixed: Toggling vid_vsync would reset the displayed fullscreen gamma to 1
  on a Radeon 9000.
- Added back the off-by-one palette handling, but in a much more limited
  scope than before. The skipped entry is assumed to always be at 248, and
  it is assumed that all Shader Model 1.4 cards suffer from this. That's
  because all SM1.4 cards are based on variants of the ATI R200 core, and the
  RV250 in a Radeon 9000 craps up like this. I see no reason to assume that
  other flavors of the R200 are any different. (Interesting note: With the
  Radeon 9000, D3DTADDRESS_CLAMP is an invalid address mode when using the
  debug Direct3D 9 runtime, but it works perfectly fine with the retail
  Direct3D 9 runtime.) (Insight: The R200 probably uses bytes for all its
  math inside pixel shaders. That would explain perfectly why I can't use
  constants greater than 1 with PS1.4 and why it can't do an exact mapping to
  every entry in the color palette.
- Fixed: The software shaded drawer did not work for 2D, because its selected
  "color"map was replaced with the identitymap before being used.
- Fixed: I cannot use Printf to output messages before the framebuffer was
  completely setup, meaning that Shader Model 1.4 cards could not change
  resolution.
- I have decided to let remap palettes specify variable alpha values for
  their colors. D3DFB no longer forces them to 255.
- Updated re2c to version 0.12.3.
- Fixed: A_Wander used threshold as a timer, when it should have used
  reactiontime.
- Fixed: A_CustomRailgun would not fire at all for actors without a target
  when the aim parameter was disabled.
- Made the warp command work in multiplayer, again courtesy of Karate Chris.
- Fixed: Trying to spawn a bot while not in a game made for a crashing time.
  (Patch courtesy of Karate Chris.)
- Removed some floating point math from hu_scores.cpp that somebody's GCC
  gave warnings for (not mine, though).
- Fixed: The SBarInfo drawbar command crashed if the sprite image was
  unavailable.
- Fixed: FString::operator=(const char *) did not release its old buffer when
  being assigned to the null string.
- The scanner no longer has an upper limit on the length of strings it
  accepts, though short strings will be faster than long ones.
- Moved all the text scanning functions into a class. Mainly, this means that
  multiple script scanner states can be stored without being forced to do so
  recursively. I think I might be taking advantage of that in the near
  future. Possibly. Maybe.
- Removed some potential buffer overflows from the decal parser.
- Applied Blzut3's SBARINFO update #9:
  * Fixed: When using even length values in drawnumber it would cap to a 98
    value instead of a 99 as intended.
  * The SBarInfo parser can now accept negatives for coordinates. This
    doesn't allow much right now, but later I plan to add better fullscreen
    hud support in which the negatives will be more useful. This also cleans
    up the source a bit since all calls for (x, y) coordinates are with the
    function getCoordinates().
- Added support for stencilling actors.
- Added support for non-black colors specified with DTA_ColorOverlay to the
  software renderer.
- Fixed: The inverse, gold, red, and green fixed colormaps each allocated
  space for 32 different colormaps, even though each only used the first one.
- Added two new blending flags to make reverse subtract blending more useful:
  STYLEF_InvertSource and STYLEF_InvertOverlay. These invert the color that
  gets blended with the background, since that seems like a good idea for
  reverse subtraction. They also work with the other two blending operations.
- Added subtract and reverse subtract blending operations to the renderer.
  Since the ERenderStyle enumeration was getting rather unwieldy, I converted
  it into a new FRenderStyle structure that lets each parameter of the
  blending equation be set separately. This simplified the set up for the
  blend quite a bit, and it means a number of new combinations are available
  by setting the parameters properly.


SVN r710 (trunk)
2008-01-25 23:57:44 +00:00