DOjS, eine JavaScript Engine for DOS

Moins,

ich habe drei Tage Coding-Marathon hinter mir und will kurz vorstellen was ich gebaut habe:
DOjS ist ein JavaScript-Interpreter fuer DOS (MS-DOS und FreeDOS).
Die Scripte haben folgende Funktionen zur Verfuegung:

• 640x480x24 Bildschirm
• Abfragen von Maus- und Tastaturevents
• Laden und zeichnen von BMP Bildern
• Laden und zeichnen von GRX-Fonts
• Laden und abspielen von WAV-Files
• FM-Sounds

Das Ganze basiert auf MuJS, GRX und dem Beispielcode von Steven Don.
Entwickelt habe ich unter Win10 mit VSCode, compiliert mit DJGPP unter WSL und getestet mit DOSBox.

Wenn ich den Code aufgeraeumt und ein bissel Dokumentiert habe kommt das Ganze auf mein Giithub.

Beispiel 1: Einfaches Malprogramm auf meinem AMD K6-II 500MHz

Beispiel 2: Game of life

Gruss Ilu

Inzwischen gibt es das zweite Release auf GitHub: https://github.com/SuperIlu/DOjS

Version 0.6 (the 2nd coming)

• Added CHANGELOG
• Now linking with DJGPP FPU emulation (`-lemu`)
• Added support for file reading/writing (see `Read()` and `File()`)
• Fixed Makefile.unix
• Reformated the whole code. I didn't notice my notebook had different settings in VSCode when releasing v0.5
• added `Read()` and `Require()`
• Finally some stack traces in the logfile in case of errors
• improved logfile output for detected hardware
• switched to new script format with `Setup()` and `Loop()`
• Added `MouseSetCursorMode()`
• Fixed object creation
• Added MIDI playing
• Added IPX networking

Inzwischen gibt es das dritte Release auf GitHub: github.com/SuperIlu/DOjS

Version 0.7 (the third installment)

• Wrote a text editor for in-line script editing.
• Added inline-help and logfile viewer.
• Added frame rate limit and `GetFramerate()` and `SetFramerate()`
• Added `Gc()` which can log to `JSLOG.TXT`
• Made command line override for SBlaster autodetection.
• Added font resizing.
• Added color mask functionality from GRX.
• Added NO_COLOR to predefined colors.
• Hopefully fixed Makefile dependency tracking
• Added PNG loading.
• Added command line parameters to select screen mode.
• Added PNG and BMP saving.
• Added `List()` and `Stat()` for directory traversal.
• Shortened key codes in `jsboot/func.js` and added `CharCode()`
• DOjS now has a mascot.
• Makefile now had ZIP target.

Laenger her das ich ein Update geschrieben habe: Wer noch eine 3dfx Voodoo-Karte sein eigen nennt, der kann die jetzt mit JavaScript unter MS-DOS programmieren.

https://github.com/SuperIlu/DOjS/releases/tag/v0.99

Hier das komplette Changelog seit 0.7:

Version 0.9.9 (the voodoo vision)

• Fixed typo in the GetXRotateMatrix() functions.
• Sped up several 3D math function by implementing them in C (native JS functions still available by prefixing 'N').
• Added Bitmap.DrawAdvanced() for scaled bitmap drawing.
• Fixed CTRL-C handling on FreeDOS, now copy & paste works there as well.
• You can now pass command line parameters to your scripts.
• Added String.startsWith() and String.endsWith() from MDN.
• Added HSBColor() to native API.
• Fixed SizeX() and SizeY() after using SetRenderBitmap()
• Added joystick functions.
• Fixed "new sketch" template.
• Added 3Dfx/Glide support for Voodoo1/2/3/4/5/Banshee/Rush
• Improved error reporting from Allegro
• Added automatic fallback to 24bbp when 32bbp are not available
• Fixed the remote logviewer and some examples

Version 0.9.8 (the expanded dimension)

• updated help.txt and README.md
• added sound input functions.
• finished 3D drawing functions, zbuffer functions and 3D math functions.
• You can now render to Bitmaps created by new Bitmap(width, height)
• Color() now also works with three arguments (alpha is 255 for missing value).
• Fixed missing documentation.

Version 0.9.7 (the latest lament)

• fixed rect().
• added Bitmap.DrawTrans() for 32bit TGA images w/ alpha.
• Added Cut, Copy & Paste to the editor.
• Added auto indent and backtab handling.
• Started working on allegro 3D fuctions (unfinished, untested)!

Version 0.9.6 (the crashing creation)

• Fixed massive crash when using the builtin font in p5 compatibility layer
• Some API improvements
• Even more examples and a DOjS presentation done with DOjS
• Small fixes for image(), arc() and text() in p5 compatibility layer
• Enabled transparency for 24bpp and 32bpp mode (was only 32bpp before).
• Added useable alpha value to the return value of GetPixel()
• As always: more examples
• updated MuJS to latest version from http://git.ghostscript.com/?p=mujs.git;a=summary

Version 0.9.5 (the changed creation)

• Replaced libmikmod, GRX and all sound code by Allegro 4.2.2.
• Transparency/RGBA now works.
• added TransparencyEnabled() to switch during runtime.
• Internal API changed quite much due to the switch to Allegro.
• p5js compatibility improved because of the better color handling.
• Added command line switch to disable transparency for speed reasons.
• PNGs are no longer supported, Allegro comes with PCX, TGA and BMP support only.
• Text printing lost a lot of its options due to the switch to Allegro.
• SHIFT-F4 now clears the logfile before running the script.
• Improved internal debugging features.
• Splitted func.c into gfx.c and func.c.
• Implemented push() and pop() in p5js compatibility layer.
• Added a test-folder with scripts dedicated to test the API.
• Added translate(), rotate(), shearX(), shearY(), resetMatrix(), scale() and applyMatrix() in p5js compatibility layer.

Version 0.9.1 (the fixed foreboding)

• Fixed libmikmod creating a WAV file when no soundcard is detected.
• Added logging to another machine using IPX. set REMOTE_DEBUG=true and start jsboot/logview.js on other machine.
• Added GetPixel() which returns the Color of an on-screen pixel.
• Added Bitmap.GetPixel() which returns the Color of an image pixel.
• Fixed/added some stuff in GRX.

Version 0.9 (the fifth foreboding)

• Fixed millis() in p5js compatibility layer.
• Improved mouse display (still flickering, though).
• Fixed MouseShowCursor(false) (sort of).
• Added node discovery and address helpers to IPX module.
• Fixed mousePressed() and implemented mouseDragged()in p5js compatibility layer.
• Added HSL and HSB color mode to p5js compatibility layer.
• Added very simple syntax highlighting to the editor.
• Added CustomLine(), CustomBox(), etc to native API
• Added strokeWeight() to p5js compatibility layer.
• Renamed tests/ to examples/
• Fixed Makefile on OSX.
• Switched to libmikmod for MOD and WAV sound output.

Version 0.8 (the fourth forecoming)

• Tuned the compiler flags to pentium class CPUs
• Added command line option to turn off SoundBlaster code
• Added double buffering to video output to reduce the flickering
• Added more examples
• Added MemoryInfo()
• Changed Print() to Println(), added Print() w/o NEWLINE.
• Added Include() which loads a module into top level context.
• Added Debug() and DEBUG to support conditional debug output.
• Changed Require() to search modules in jsboot/ and the current directory.
• File.ReadByte() now returns null at EOF.
• Improved documentation.
• Improved detection of missing SoundBlaster.
• Added Processing/p5js compatibility layer.
• Added some examples from the p5js example library.

Es gab dann im letzten Jahr noch ein/zwei Releases

Fertige Binaries weiterhin auf der GitHub Release-Seite: https://github.com/SuperIlu/DOjS/releases