Crispy Doom

Crispy Doom is a limit-removing enhanced-resolution Doom source port based on Chocolate Doom.

Its name means that its internal 640x400 resolution looks "crisp" and is also a slight reference to its origin.

Synopsis

Crispy Doom is a friendly fork of Chocolate Doom that provides a higher display resolution, removes the static limits of the Doom engine and offers further optional visual, tactical and physical enhancements while remaining entirely config file, savegame, netplay and demo compatible with the original.

Objectives and features

Crispy Doom is a source port that aims to provide a faithful Doom gaming experience while also featuring some user-requested improvements and enhancements. It is forked off of Chocolate Doom to take advantage of its free and open-source code base, portability, accuracy and compatibility with Vanilla Doom.

Its core features are:

Enhanced 640x400 display resolution, with the original 320x200 resolution still available in the "High Resolution Rendering: Off" mode.
Widescreen rendering for using all the available horizontal space of screens with aspect ratios up to 24:9.
Uncapped rendering framerate with interpolation and optional vertical synchronization (VSync) with the screen refresh rate.
Intermediate gamma correction levels (0.5, 1.5, 2.5 and 3.5).
Removal of all static engine limits, or at least raising of the less crucial ones.
Full support for the "Doom Classic" WADs shipped with the "Doom 3: BFG Edition", especially the "No Rest For The Living" episode shipped in the NERVE.WAD file.
Support for all versions of John Romero's Episode 5: Sigil for Ultimate Doom.

Furthermore, the following optional user-visible and audible features are available:

Jumping.
Free vertical looking, including mouse look and vertical aiming.
Aiming support by a crosshair that may get directly rendered into the game world.
A new minimal Crispy HUD, displaying only the status bar numbers.
Clean Screenshot feature, enabling to take screenshots without HUD elements and even without status bar numbers and weapon sprites at higher screen sizes.
Colorized status bar numbers, HUD texts and blood sprites for certain monsters.
Translucency for certain sprites and status bar elements in the Crispy HUD.
Randomly mirrored death animations and corpse sprites.
Command line options to allow for playing with flipped player weapon sprites and/or entirely flipped level geometry.
Players may walk over or under monsters and hanging corpses.
Centered Weapons when firing, weapon recoil thrust and pitch.
Reports whenever a secret is revealed.
Level statistics and extended coloring in the Automap.
Playing sounds in full length, and misc. other sound fixes.
Demo recording and/or playback timers and progress bar.
Demo continue and take-over features, handing controls over to the player when demo playback is finished or interrupted.

Most of these features are disabled by default and need to get enabled either in the in-game "Crispness" menu, in the crispy-doom-setup tool or as command line parameters. They are implemented in a way that preserves demo-compatibility with Vanilla Doom and network game compatibility with Chocolate Doom. Furthermore, Crispy Doom's savegames and config files are compatible, though not identical (see the Compatibility section in the Wiki), to Vanilla Doom's.

Crispy Doom strives for maximum compatibility with all "limit-removing Vanilla" maps -- but not Boom or ZDoom maps. More specifically, Crispy Doom supports some select advanced features such as ANIMATED and SWITCHES lumps, MBF sky transfers, SMMU swirling flats and MUSINFO -- but neither generalized linedef and sector types nor DECORATE and MAPINFO.

Many additional less user-visible features have been implemented, e.g. fixed engine limitations and crashes, fixed rendering bugs, fixed harmless game logic bugs, full support for DEHACKED files and lumps in BEX format, additional and improved cheat codes, an improved Automap, and many more! Due to the extra DEHACKED states added from MBF, Crispy Doom supports enhancer mods that can make the gameplay even more pleasing to the eyes. For a detailed list of features and changes please refer to the release notes below.

New controls (with default bindings)

Move Forward (alt.) W
Move Backward (alt.) S
Strafe Left (alt.) A
Strafe Right (alt.) D
Jump (bindable to joystick and mouse buttons as well) / (as in Hexen and Strife)
Quick Reverse (bindable to mouse buttons as well)
Mouse Look (bindable to mouse buttons or permanent)
Look up (bindable to joystick axes as well) PgDn (as in Heretic)
Look down (bindable to joystick axes as well) Del (as in Heretic)
Center view End (as in Heretic)
Toggle always run ⇪
Toggle vertical mouse movement (new in 5.4)
Delete savegame Del
Go to next level
Reload current level
Save a clean screenshot
Toggle Automap overlay mode O
Toggle Automap rotate mode R
Resurrect from savegame (single player mode only) "Run" + "Use"

New command line parameters

-dm3 specifies the Deathmatch 3.0 rules (weapons stay, items respawn) for netgames (since 4.1).
-episode 1 launches Hell on Earth and -episode 2 launches No Rest for the Living episode if the Doom 2 IWAD shipped with the Doom 3: BFG Edition is used.
-warp 1a warps to the secret level E1M10: Sewers of XBox Doom IWAD (since 2.3).
-mergedump <file> merges the PWAD file(s) given on the command line with the IWAD file and writes the resulting data into the <file> given as argument. May be considered as a replacement for the DEUSF.EXE tool (since 2.3).
-lumpdump dumps raw content of a lump into a file (since 5.7).
-blockmap forces a (re-)building of the BLOCKMAP lumps for loaded maps (since 2.3).
-playdemo demoname -warp N plays back fast-forward up to the requested map (since 3.0).
-loadgame N -record demoname and -loadgame N -playdemo demoname allow to record and play demos starting from a savegame instead of the level start (since 4.0).
-playdemo demoname1 -record demoname2 plays back fast-forward until the end of demoname1 and continues recording as demoname2 (new in 5.5).
-fliplevels loads mirrored versions of the maps (this was the default on April 1st up to version 5.0).
-flipweapons flips the player's weapons (new in 5.3).
-levelstat prints a levelstat.txt file with statistics for each completed level (new in 5.9.0).
-pistolstart reset health, armor and inventory at start of each level in Doom (new in 5.9.2)
-wandstart reset health, armor and inventory at start of each level in Heretic (new in 5.9.2)
-doubleammo doubles ammo pickup rate in Doom and Strife (new in 5.11).
-moreammo increases ammo pickup rate by 50% in Heretic (new in 5.11).
-moremana increases mana pickup rate by 50% in Hexen (new in 5.11).
-fast enables fast monsters in Heretic and Hexen (new in 5.11).
-autohealth enables automatic use of Quartz flasks and Mystic urns in Heretic and Hexen (new in 5.11).
-keysloc enables display of keys on the automap in Heretic (new in 5.11).

New cheat codes

TNTWEAP followed by a weapon number gives or removes this weapon (8 = Chainsaw, 9 = SSG). TNTWEAP0 takes away all weapons and ammo except for the pistol and 50 bullets. Try to load Doom 1 with DOOM2.WAD as a PWAD and type TNTWEAP9 to play the SSG in Doom 1.
TNTEM, KILLEM or FHHALL kill all monsters on the current map (and disables all cube spitters).
SPECHITS triggers all Linedef actions on a map at once, no matter if they are enabled by pushing, walking over or shooting or whether they require a key or not. It also triggers all boss monster and Commander Keen actions if possible.
NOTARGET or FHSHH toggle deaf and blind monsters that do not act until attacked.
TNTHOM toggles the flashing HOM indicator (disabled by default).
SHOWFPS or IDRATE toggle printing the FPS in the upper right corner.
NOMOMENTUM toggles a debug aid for pixel-perfect positioning on a map (not recommended to use in-game).
GOOBERS triggers an easter egg, i.e. an "homage to an old friend". ;-)
IDBEHOLD0 disables all currently active power-ups (since 2.2).
IDCLEV00 restarts the current level (since 2.0).
IDMUS00 restarts the current music (new in 5.1).
VERSION shows the engine version, build date and SDL version (new in 5.1).
SKILL shows the current skill level (new in 5.5.2).

Download

Source code and Windows binaries (compatible with both x86 and x64 editions) for the latest release can be found on the Release page.

The most recent list of changes can be found in the Changelog.

A complete history of changes and releases can be found in the Wiki or on the Releases page.

To install on Ubuntu ("Eoan Ermine" 19.10 and later)/Debian ("Buster" 10 and later) based systems:

sudo apt-get install crispy-doom

Daily builds of Crispy Doom can be found here: http://latest.chocolate-doom.org/

Crispy Doom can play nearly all variants of Doom. If you don't own any, you may download the Shareware version of Doom, extract it and copy the DOOM1.WAD file into your Crispy Doom directory. Alternatively, you may want to play Crispy Doom with Freedoom and a MegaWAD.

Sources

The Crispy Doom source code is available at GitHub: https://github.com/fabiangreffrath/crispy-doom. It can be downloaded in either ZIP or TAR.GZ format or cloned via

 git clone https://github.com/fabiangreffrath/crispy-doom.git

Brief instructions to set up a build system on Windows can be found in the Crispy Doom Wiki. A much more detailed guide is provided in the Chocolate Doom Wiki, but applies to Crispy Doom as well for most parts.

Compilation on Debian systems (Debian 10 "buster" or later) should be as simple as

 sudo apt install build-essential automake git
 sudo apt build-dep crispy-doom

to install the prerequisites and then

 cd crispy-doom
 autoreconf -fiv
 ./configure
 make

After successful compilation the resulting binaries can be found in the src/ directory.

Contact

The canonical homepage for Crispy Doom is https://github.com/fabiangreffrath/crispy-doom

Crispy Doom is maintained by Fabian Greffrath.

Please report any bugs, glitches or crashes that you encounter to the GitHub Issue Tracker.

Acknowledgement

Although I have played the thought of hacking on Chocolate Doom's renderer for quite some time already, it was Brad Harding's Doom Retro that provided the incentive to finally do it. However, his fork aims at a different direction and I did not take a single line of code from it. Lee Killough's MBF was studied and used to debug the code, especially in the form of Team Eternity's WinMBF source port, which made it easier to compile and run on my machine. And of course there is fraggle's Chocolate Doom with its exceptionally clean and legible source code. Please let me take this opportunity to appreciate all these authors for their work!

Also, thanks to plums of the Doomworld forums for beta testing, "release manager" Zodomaniac and "art director" JNechaevsky for the continuous flow of support and inspiration during the post-3.x development cycle and (last but not the least) Cacodemon9000 for his Infested Outpost map that helped to track down quite a few bugs!

Furthermore, thanks to VGA for his aid with adding support for his two mods: PerK & NightFright's Black Ops smooth weapons add-on converted to DEHACKED and Gifty's Smooth Doom smooth monster animations converted to DEHACKED that can make the gameplay even more pleasing to the eyes.

Legalese

Doom is © 1993-1996 Id Software, Inc.; Boom 2.02 is © 1999 id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman; PrBoom+ is © 1999 id Software, Chi Hoang, Lee Killough, Jim Flynn, Rand Phares, Ty Halderman, © 1999-2000 Jess Haas, Nicolas Kalkhof, Colin Phipps, Florian Schulze, © 2005-2006 Florian Schulze, Colin Phipps, Neil Stevens, Andrey Budko; Chocolate Doom is © 1993-1996 Id Software, Inc., © 2005 Simon Howard; Chocolate Hexen is © 1993-1996 Id Software, Inc., © 1993-2008 Raven Software, © 2008 Simon Howard; Strawberry Doom is © 1993-1996 Id Software, Inc., © 2005 Simon Howard, © 2008-2010 GhostlyDeath; Crispy Doom is additionally © 2014-2019 Fabian Greffrath; all of the above are released under the GPL-2+.

Secret Rabbit Code (libsamplerate) is © 2002-2011 Erik de Castro Lopo and is released under the GPL-2+. Libpng is © 1998-2014 Glenn Randers-Pehrson, © 1996-1997 Andreas Dilger, © 1995-1996 Guy Eric Schalnat, Group 42, Inc. and is released under the libpng license. Zlib is © 1995-2013 Jean-loup Gailly and Mark Adler and is released under the zlib license.

The Crispy Doom icon (as shown at the top of this page) has been contributed by Philip.

Nightwolf-47 / crispy-doom