Demos

Since a few days ago, ScummVM also supports a few BAT- and SCN-based non-interactive demos,
namely for Inca 2, Woodruff, Urban Runner and Playtoons. The interesting thing about them is that, strictly speaking, they’re not Gob-based, but are just either a BAT file that calls a small program for IMD playback; or a small interpreter for a simple SCN script with VMD playback capabilities. Either way, they practically just consist of IMD/VMD videos.
If you find a Coktel Vision demo that doesn’t yet work with the latest daily build of ScummVM, I’d be interested in getting my hands on it. 🙂

Sparked by the resulting demo exchange and discussion in #scummvm, sanguinehearts also set up an unified hosting site for demos (which we’ve been missing) and started uploading all demos already known to the team.
Similar to above, we’d like to get any yet unknown demos for ScummVM-supported games you might have.

More Beauties to Dither

This is just a quick follow-up to the dithering post.

Firstly: Yeah, it’s kinda late. Unfortunately, I have been busy with RL and didn’t have much time to work on Gob.

Secondly: Sorry Seldon, but I didn’t get much out of your posts. As far as I understood, it’ll only lead to a lookup that’s far too complex for my needs. The point is a bit moot now anyways, as you can see below. But thanks all the same! 🙂

The actual reason reason for this blog entry is that I did fiddle with the code a bit, though. In some spare minutes, I’ve asked my coworkers/bosses about my problem and they’ve suggested using a more crude approximation of the distance function, namely
ABS(x1 – x2) + ABS(y1 – y2) + ABS(z1 – z2)
This would remove the need for the costly multiplication. Whether it still looks good is a thing to try out. Which I did, and it does. Continue reading

Dithering Beauty

As a start, I’d like to talk a bit about dithering.
When I found out that Urban Runner’s VMD use the Indeo 3 codec for video frame data, I was a bit crushed: The resulting frames are in true color (in the YUV colorspace) and ScummVM doesn’t (yet?) support a true color mode for game graphics — only paletted 8-bit colors.

So at first, to test the Indeo 3 decoder (copied from the great FFmpeg project), I just wrote the frame to files. The results looked, after fiddling a bit, like that: Continue reading

Introduction

Well… Apparently, I’ve finally given in to peer pressure and started my own ScummVM-related blog… You can stop smirking like that, clone! ;P

I doubt many people will read this, but it’ll give me a place to vent when I’ve found another stupid (or vile, in many cases) thing in the disassembly of one of the Coktel Vision games. Maybe something I write here will even be educational, interesting and/or funny to some people — not very likely, but we’ll see…