Re: Hires Graphics trouble

["Mark Cummings" <NOTfigjams@primus.com.au>]

Mousepaint is for Hires Images only, 8K files=280x192 pixels. Dazzle Draw
uses Double Hires Images 16K files=560 x 192 pixels. The reason you see
stripes when you load a Mousepaint image with the program below, is that
Double Hires images are interlaced every 7 pixels. In other words you get 7
horizontal pixels from one byte of main memory, followed by 7 pixels from
one byte in Auxilliary memory. Since the Mousepaint image is only 8K, the
rest of the memory is not loaded with an image, just whatever was left in
there before, mostly $FF I guess, which display as black IIRC. The picture
is probably mostly white, so that's why you see stripes.

Hope this is



"Simon Williams" <ludditetech@mac.com> wrote in message
9f61cf69.0207012031.7bb5f57d@posting.google.com">news:9f61cf69.0207012031.7bb5f57d@posting.google.com...
> > D$=CHR$(4)
> > PRINT D$;"PR#3"
> > PRINT D$;"BLOAD MY.DHR.FILE,A$2000"
> > PRINT D$;"BSAVE /RAM/DHR.TEMP,A$2000,L$2000"
> > PRINT D$;"BSAVE /RAM/DHR.TEMP.2,A$4000,L$2000"
> > PRINT D$;"BLOAD /RAM/DHR.TEMP.2,A$2000"
> > PRINT D$;"DELETE /RAM/DHR.TEMP.2"
> > PRINT D$;"DELETE /RAM/DHR.TEMP"
> > POKE 49232,0
> > POKE 49234,0
> > POKE 49239,0
> > POKE 49246,0
>
> That works perfectly for Dazzle Draw images, but Mousepaint pictures
> come up with vertical bands of 'garbage'... obviously the two formats
> are incompatible as neither application can open the other's files, so
> I suppose they would require different methods of loading.
> By the looks of how Mousepaint treats Dazzle Draw images, I'd say the
> two don't even use the same screen resolution...
>
> Anyone have the original docs for Mousepaint? Maybe there's an answer
> in there...
>
> SW
>
> PS thanks for all the help/suggestions.