🚀 go-pugleaf

On 11-Apr-96 13:28:54, Trixter / Hornet <trixter@MCS.COM> wrote:
>(This has been crossposted to amiga.demos and amiga.graphics)

>In article <4kgqme$2dh@sparcserver.lrz-muenchen.de>,
>DAVID LIEBERMANN  <deel@ldvgpi02.eikon.e-technik.tu-muenchen.de> wrote:
>>
>>I have collected quite some pictures from competitions and from other
>>sources and I just lately wondered if there is a special program around
>>to view all pictures in the correct aspect ratio. For example, I wonder
>>what resolution is best for strange sizes like 640x512 (like lots of
>>competition entries) or 320x256 (Exactly half in x&y. Maybe there is a
>>640x512 resolution (with doublescan in both x and y ??) that my card
>>doesn't know..). And I also got some pictures in 368x283. Where are
>>those from ??

>Those are mostly Amiga modes, with the last one looking vaguely
>like a C64 resolution.

  These are perfectly normal Amiga resolutions.  640x512 is PAL hires laced or
doublescan, and 320x256 is PAL lores.  368x283 is PAL lores overscan.

  Overscan is commonly used in video applications, and what it does is extend
the screen resolution (and image) to the edge of the screen (and beyond),
without changing the size of the pixels.


>I think it's about time I coded up a small PC .GIF/.LBM viewer for
>these pictures... This question has popped up too many times.  I've
>figured out some of the odd ones, like 320x256, and with Liket's
>help I'm sure I can figure out the others.

>So, 320x200, 320x400, 320x256, 320x512... Any others?  I want this
>to work on a standard VGA card, so no 640x(>400) modes (only 256K of
>video memory), but I'd be happy to support any of the other modes
>out there, and I can get 640x200 and 640x256 working, I'm sure.
>Are there any other modes/resolutions that I'm forgetting?

  Hires overscan goes to 768x566 in PAL, or x486 in NTSC.  Pictures of this
resolution, or one of the other overscan sizes (752 for D2, 720 for D1) are
common for video capture images and animations.

  You also might need some sort of converter for images with greater than 256
colors, which is pretty common for demos & artwork.

  Obviously, there are resolutions that far exceed a standard VGA display.  But
you should be able to handle many of them by using a higher resolution mode;
SVGA 800x600 24 bit should cover any of the video-compatible image modes.

--
*-__________________________ | *Starfire* | _________________________-*
Jeff Jones  email:jeffsj@execpc.com  *//* Amiga Lives! |Born
*TFG* *Starfire* Design Studio        *\\//* 1985-1994,    |again 1995!
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