Search found 115 matches

by DamageX
Nov 12, 2017 9:27
Forum: General
Topic: passing strings to external functions
Replies: 23
Views: 1087

passing strings to external functions

what is the difference between these three code snippets? I have found that only one of them works, but I don't know why. declare function SomeThing (byval as any ptr) as integer dim stuff as string stuff="cheerios" ? SomeThing(@stuff) declare function SomeThing (byref as string) as intege...
by DamageX
Oct 26, 2017 4:56
Forum: Game Dev
Topic: Ways in which I can embed a video player into GFX window?
Replies: 11
Views: 1838

Re: Ways in which I can embed a video player into GFX window?

Vorbis shouldn't have any patents. I think that was pretty much the whole point of it. It can also be used with AVI (Vorbis ACM codec). I'm not sure why you think AVI would take more space, it depends 98% on which codecs are used, not so much on the container.
by DamageX
Oct 23, 2017 8:32
Forum: Tips and Tricks
Topic: convert WAV files with ACM (win32)
Replies: 0
Views: 542

convert WAV files with ACM (win32)

Here is a program that converts a WAV file containing uncompressed PCM to one containing MP3 audio. This requires the LAME MP3 ACM codec being installed on your system. Specify the input file and output file names on the command line. ' convert PCM to LAME 160Kbps, CBR, 44KHz stereo ' compiled with ...
by DamageX
Oct 23, 2017 7:49
Forum: Game Dev
Topic: Ways in which I can embed a video player into GFX window?
Replies: 11
Views: 1838

Re: Ways in which I can embed a video player into GFX window?

Bink might be an option. It's really easy to use but you would have to use the .bik format for your cutscenes. Edit: Come to think of it. I believe you have to purchase a license if you want to distribute your game. So this may not be an option for you. Now that you mention it, wouldn't there be si...
by DamageX
Sep 30, 2017 9:17
Forum: General
Topic: Find the best 8 bit palette for an RGB image
Replies: 67
Views: 3488

Re: Find the best 8 bit palette for an RGB image

@D.J.Peters To use floyd-steinberg dithering you need a modifiable copy of the bitmap (or at least two raster lines at a time I guess). Could your function to convert to CGA colors pass a pointer to a bitmap instead of a single pixel? My program can already convert to CGA/EGA palette... http://www.h...
by DamageX
Sep 29, 2017 9:58
Forum: General
Topic: Find the best 8 bit palette for an RGB image
Replies: 67
Views: 3488

Re: Find the best 8 bit palette for an RGB image

actually I just noticed that irfanview also has a checkbox for Floyd-Steinberg which works well on my test image...
by DamageX
Sep 29, 2017 7:37
Forum: General
Topic: Find the best 8 bit palette for an RGB image
Replies: 67
Views: 3488

Re: Find the best 8 bit palette for an RGB image

My two cents... In the program "IMGTOOL" that I have posted previously there is a color reduction routine. I will explain the algorithm used: 1) count colors and sort by frequency 2) set threshold for "close enough" color distance 3) beginning with colors of least frequency, remo...
by DamageX
Sep 16, 2017 21:24
Forum: Windows
Topic: Streaming audio
Replies: 12
Views: 3184

Re: Streaming audio

Finaly I have discovered the simplest way to play a WAV music. Yes! Playing WAV data from memory buffer is also similar. The only thing needed from includes is a single declaration. Why didn't anybody tell me it was this easy? ' Windows PCM audio demo ' take care not to blow up your speaker declare...
by DamageX
Jul 16, 2017 7:40
Forum: Tips and Tricks
Topic: randomly generated graphics demo
Replies: 5
Views: 871

randomly generated graphics demo

I came up with this algorithm a while back when I was thinking about possibilities for the 4KB demo category. Of course, FB executable itself is much too big. I could have made it a Sega Saturn or DOS program... but I never did. Most of the parameters are randomly chosen but some are tunable by hand...
by DamageX
Jul 08, 2017 8:04
Forum: DOS
Topic: Executing a child 32bit DOS program and sharing a function
Replies: 7
Views: 1223

Re: Executing a child 32bit DOS program and sharing a function

I've never tried this, but I guess you would use DPMI function $0205 Set PM Interrupt Vector. And it seems that you can determine the address of an FB subroutine by using the syntax @SubName (as seen in FBWiki page for ThreadCreate). Then use inline assembly to put an iret instruction at the end of ...
by DamageX
Jan 30, 2017 9:03
Forum: General
Topic: Free library to read and write JPEG pics?
Replies: 12
Views: 1008

Re: Free library to read and write JPEG pics?

You may want to check out my posts in the "Tips and Tricks" section. I posted an example program which displays JPG on the screen, and one which converts BMP to JPG. The source code for my IMGTOOL also contains both routines but with assembly optimization (and possibly some bug fixes for t...
by DamageX
Oct 14, 2016 6:46
Forum: Projects
Topic: 3d model editor (and other stuff)
Replies: 7
Views: 2534

Re: 3d model editor

Here is an update to MBFAST. Changes include automatic memory management instead of manual, 4bpp screen support, probably some other things. I worked on the "drill" function which is now partially functional. I'm also including IMGTOOL, a bitmap editor. Has basic stuff like crop, resize, c...
by DamageX
Sep 27, 2016 6:25
Forum: DOS
Topic: Why are graphics so slow, especially in high resolution, in DOS?
Replies: 10
Views: 2327

Re: Why are graphics so slow, especially in high resolution, in DOS?

You might need to use utilities such as FASTVID or MTRRLFBE to enable write combining for faster screen updates under pure DOS.

With write combining enabled, sequential writes (eg. framebuffer copy) to video memory usually become 2-3x faster.
by DamageX
Jun 03, 2016 8:56
Forum: General
Topic: OOP or not OOP... That's the question! XD
Replies: 21
Views: 1641

Re: OOP or not OOP... That's the question! XD

I'm an assembly language programmer at heart. High level languages hide certain realities of the underlying hardware/OS and replace them with abstractions. There are some abstractions that I like. Not always having to micromanage CPU register usage is a time saver, for instance. There are other abst...
by DamageX
May 22, 2016 22:38
Forum: Community Discussion
Topic: Frustrated and need to discuss...
Replies: 69
Views: 4596

Re: Frustrated and need to discuss...

Here is a dirty, unoptimized PNG decoder. http://www.hyakushiki.net/misc/pngl.bas Only supports 8bit samples. No palettes. No CRC checking. Red and blue are backwards. Does not support static huffman tables (which aren't supposed to be used in PNGs but some programs use them anyway it seems) RFC 195...

Go to advanced search