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DOS PNG support (Announce)

posted by DOS386, 12.12.2009, 13:40
(edited by DOS386 on 12.12.2009, 13:57)

> It still amazes me that RLE support within BMP's has never been used as
> much as it should have been. Not that I'm supporting the use of BMP's

Forget RLE in BMP's ;-)

> There's no need for sarcasm.... oh wait there is!
see below

> Well I was thinking of DOS viewer support. e.g. QV v2.58 doesn't support PNG

True, but not relevant

> PNG whereas PV v2.78 does support PNG.

Display supports PNG, PictView supports PNG, Blocek supports PNG (regrettably buggy), CSHOW reportedly supports PNG (crappy), NCONVERT supports PNG, my experimental PNG code supports (but what ??? :lol: ), ...

> looked at real old stuff like CSHOW etc but last time I checked

20 years ago :clap:

> that didn't support PNG!

It does, if you use the Time Dilatation Hack correctly to suppress the ERROR 200 BUG :-P

> I was not aware of attempts to get Firefox to under HX until I read your
> own posting about it, but clearly not even that looks like an option for
> viewing PNG under DOS right now.... and lets not add FF to the ZIP just to
> view a couple of PNG's.
See ^^^ above

> Indeed I have been following the HX threads with interest for sometime.
> I did note that Rugxulo and myself seem to be very aligned about
forgot to set the AC bit in EFLAGS ???

> id=7332 NOT using PNG's under DOS for the very good reasons we've pointed out

YES, the reasons are there, but are just invalid. But feel free to use PNG's under CP/M only :hungry:

> Ok, fine. Feel free to limit your audience

:-)

> Real world experience.... Indeed I vaguely remember writing for this code
> Type
> TGA_Head=Record
> ID_filed_Length:Byte; {1 1}
> ColorMapFlag:Byte; {1 2} {1 = paletted image, 0 = TrueColor}
> ImageType:Byte; {1 3}
> FirstColorMapEntry:Word; {2 5}
> ColorMapSize:Word; {2 7}
> ColorMapEntrySize:Byte; {1 9}
> X_Left:Word; {2 10 }
> Y_Upper:Word; {2 12 }
> PixelWidth:Word; {2 14 }
> PixelHeight:Word; {2 16 }
> Bits_Per_Pixel:Byte; {1 17 } {Number of bits per pixel for each
> plane}
> ImageDescriptorByte:Byte; {1 18}

Is it Fortran or Cobol ??? Supply a "well" compressed TGA :hungry:

> > > The documentation is going to be a .pdf but
> > you can't read PDF's in DOS :confused:
> But your progressive. Can't you read it with Firefox along with PNG's

NO. FireFox doesn't support PDF, RTFM :hungry:

> Try Halibut (or from its developer's site), it lets you write messy text files with a
> small amount of markup and converts them to proper text files and HTML
> documents and PDF documents (and some more).
Yeah :-|

> Even PCX has some wimpy optional compression, no?
YES, it's just dead (see far above) ;-)

> The only PNG viewers for DOS (off the top of my head) are Display,

:-)

> QV/PNG
???

> and Pictview.
Isn't it enough ???

> Nothing for < 386, though (probably moot but still ... I can't say I don't
> dream of writing / porting bzip2 [-2 at least], .png viewer, etc).
Me too :hungry:

> OGV -> search for the APEG thread

NO. Search for DUGL Player thread.

> 7-Zip -> 7za (Win32 binary w/ HX), DJGPP p7zip, my various 7zdec compiles
YES.

> You can definitely read .PDFs in DOS, just not easily (and I never bothered)

Didn't work for me. You can well use PNG, TAR, OGV and 7-ZIP in DOS, but not PDF.

> Acroread (only old old .PDFs, but my Falcon 4.0 CD has it!).
From 1992, < 1% of PDF's around.

> > The only PNG viewers for DOS (off the top of my head) are Display, QV/PNG,
> > and Pictview. Nothing for < 386, though (probably moot but still ...
> Useful background info thanks.
http://www.unet.univie.ac.at/~a0503736/php/drdoswiki/index.php?n=Main.GraphPaintCAD

> Yeah totally agree .TXT is best. Has to also have the .TXT extension as sadly
> as you know we lost the .DOC one a long time ago... !!!

Indeed.

FYI, the 2 PNG's in the ZIP can be losslessly optimized by factor 1.51 saving almost 4 KiB of bloat :-) :-) :-)

> Keep up the good work Jason!

Don't do this !!! Or at least don't come back into this thread, it's bloated, and you will never finish reading it all :-(

---
This is a LOGITECH mouse driver, but some software expect here
the following string:*** This is Copyright 1983 Microsoft ***

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