Screenshot size

Feltzkrone · 31 October 2002, 15:10

Suggested is 320x256, but now...

(For the following text I assume HiRes mode with interlacing and PAL video standard...)

WinUAE uses a resolution of exactly 688x568 pixels (°), whose width of 688 pixels is fully used by the TRSI cracktro of Paladin 2. The Elfmania loading screen uses the full height of 568 pixels.

(°): Switch off that stupid (okay, it isn't stupid in most cases) horizontal and vertical screen centering, and let WinUAE run in a desktop window of 688x568 pixels, line doubling (or scanlines) and don't switch the LEDs on. You'll see most games / cracktros / whatever is centered pretty well.

With some tricks, it seems to be possible to enlarge the screen area of 640x512 pixels. Amiga graphics are normally displayed in a "playfield" of 640x512 pixels, but this playfield can be positioned freely in a range of 1024x768 pixels (in 2-pixel steps). Not to mention that standard TV modes are smaller than this, I don't know where this 1024x768 pixels wide area comes from...

I know it's much too late, but I would suggest a screenshot size of 344x284 pixels, as screenshots of games and other stuff using graphics tricks must be either resized (=blurred) or cropped (=shit).

For the screen centering shit:
It may look nice if a game which normally uses a playfield position which doesn't center it, is centered correctly through WinUAE, but... the same game won't be centered on your original Amiga machine conntected to TV or whatever. For me this is image manipulation, and I don't know if this / don't think that it is where HOL is aiming at.

By the way: WinFellow uses a 720x576 (TV mode conform) window. Now start Elfmania. The loading screen is 704x572 (h&v doubled). Oh yeah, you can try to define the same window size in WinUAE, but WinUAE aligns the produced image (with STATIC size, that's the problem!) to the upper right window corner, so that (720-688)/2 = 16 and (576-568)/2 = 4 pixels are missing on the right / on top.

In fact I wouldn't suggest 344x284 resolution for screenshots, but 360x288. The problem is that WinUAE crops the virtual image, at least at the top side (4 pixels) and right side (16 pixels). At least that was the way I used to find out the usable resolution of 688x568 pixels for WinUAE. I don't know why it comes to this (some amiga graphics chip restrictions?), but maybe Toni can explain.

Most beautiful would be a "virtual" resolution of 1024x768 which can be positioned freely in a smaller window in WinUAE.

CodyJarrett · 31 October 2002, 17:53

As you say, it's a bit late now for screenshot resolution changes. 320x256 works fine for 90% of Amiga games, so it isn't a big problem.

The idea of HOL screens in most cases is not perfect reproduction, but to give an idea of what the gameplay is like. That's how I originally intended it, anyway.

Walker · 31 October 2002, 18:31

Yup, HOL is an Amiga games database and not a preservation project. 99% of the screenshots are taken from emulated games, not the real thing. Screens and boxscans are resized to save bandwidth etc.

Feltzkrone · 31 October 2002, 20:44

Yes, ofcourse it's too late for changes. And most games only use the standard 320x240 playfield, which will be centered perfectly in WinUAE.

In the end it's information which may be useful for Toni. I got all these facts from AmigaRealm. It's got a really beautiful knowledge channel.

Just one question for my own interest:

On games which use higher screen resolutions do you crop the screenshot (take the centered 320x256 pixel field) or resize it?

CodyJarrett · 31 October 2002, 20:46

The screenshot is usually cropped, but it depends on the situation. Something like Sim City 2000, which is hi-res, would be resized.

haynor666 · 15 June 2016, 10:24

Topic is old but with recent WinUAE I have problem with setting proper native screenshot size. How do I have to set up WinUAE to get 320x256 or 320x240 screenshots ?

Predseda · 15 June 2016, 10:28

It is all about post-production. Just grab screenshots and then resize them externally. I use IrfanView batch functions.

haynor666 · 15 June 2016, 11:55

I've menaged to set WinUAE to 320x256 somehow :]

Toni Wilen · 15 June 2016, 13:13

WinUAE 3.3 has config-file only screenshot size/position options. Check beta changelogs for details. It may help.

Predseda · 15 June 2016, 14:00

BTW I opened this theme in February this year:

http://eab.abime.net/showthread.php?t=81750

haynor666 · 16 June 2016, 12:10

Ups, I missed this topic. Thanks guys

31 October 2002, 15:10	#1
Feltzkrone Junior Member Join Date: Apr 2002 Location: Germany Posts: 103	Screenshot size Suggested is 320x256, but now... (For the following text I assume HiRes mode with interlacing and PAL video standard...) WinUAE uses a resolution of exactly 688x568 pixels (°), whose width of 688 pixels is fully used by the TRSI cracktro of Paladin 2. The Elfmania loading screen uses the full height of 568 pixels. (°): Switch off that stupid (okay, it isn't stupid in most cases) horizontal and vertical screen centering, and let WinUAE run in a desktop window of 688x568 pixels, line doubling (or scanlines) and don't switch the LEDs on. You'll see most games / cracktros / whatever is centered pretty well. With some tricks, it seems to be possible to enlarge the screen area of 640x512 pixels. Amiga graphics are normally displayed in a "playfield" of 640x512 pixels, but this playfield can be positioned freely in a range of 1024x768 pixels (in 2-pixel steps). Not to mention that standard TV modes are smaller than this, I don't know where this 1024x768 pixels wide area comes from... I know it's much too late, but I would suggest a screenshot size of 344x284 pixels, as screenshots of games and other stuff using graphics tricks must be either resized (=blurred) or cropped (=shit). For the screen centering shit: It may look nice if a game which normally uses a playfield position which doesn't center it, is centered correctly through WinUAE, but... the same game won't be centered on your original Amiga machine conntected to TV or whatever. For me this is image manipulation, and I don't know if this / don't think that it is where HOL is aiming at. By the way: WinFellow uses a 720x576 (TV mode conform) window. Now start Elfmania. The loading screen is 704x572 (h&v doubled). Oh yeah, you can try to define the same window size in WinUAE, but WinUAE aligns the produced image (with STATIC size, that's the problem!) to the upper right window corner, so that (720-688)/2 = 16 and (576-568)/2 = 4 pixels are missing on the right / on top. In fact I wouldn't suggest 344x284 resolution for screenshots, but 360x288. The problem is that WinUAE crops the virtual image, at least at the top side (4 pixels) and right side (16 pixels). At least that was the way I used to find out the usable resolution of 688x568 pixels for WinUAE. I don't know why it comes to this (some amiga graphics chip restrictions?), but maybe Toni can explain. Most beautiful would be a "virtual" resolution of 1024x768 which can be positioned freely in a smaller window in WinUAE.

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31 October 2002, 17:53	#2
CodyJarrett Global Moderator Join Date: Mar 2001 Location: UK Age: 46 Posts: 6,161	As you say, it's a bit late now for screenshot resolution changes. 320x256 works fine for 90% of Amiga games, so it isn't a big problem. The idea of HOL screens in most cases is not perfect reproduction, but to give an idea of what the gameplay is like. That's how I originally intended it, anyway.

31 October 2002, 18:31	#3
Walker Junior Member Join Date: Jun 2001 Location: Sweden Age: 51 Posts: 595	Yup, HOL is an Amiga games database and not a preservation project. 99% of the screenshots are taken from emulated games, not the real thing. Screens and boxscans are resized to save bandwidth etc.

31 October 2002, 20:44	#4
Feltzkrone Junior Member Join Date: Apr 2002 Location: Germany Posts: 103	Yes, ofcourse it's too late for changes. And most games only use the standard 320x240 playfield, which will be centered perfectly in WinUAE. In the end it's information which may be useful for Toni. I got all these facts from AmigaRealm. It's got a really beautiful knowledge channel. Just one question for my own interest: On games which use higher screen resolutions do you crop the screenshot (take the centered 320x256 pixel field) or resize it?

31 October 2002, 20:46	#5
CodyJarrett Global Moderator Join Date: Mar 2001 Location: UK Age: 46 Posts: 6,161	The screenshot is usually cropped, but it depends on the situation. Something like Sim City 2000, which is hi-res, would be resized.

15 June 2016, 10:24	#6
haynor666 retro maniac Join Date: May 2002 Location: Tarnobrzeg/Poland Age: 45 Posts: 1,753	Topic is old but with recent WinUAE I have problem with setting proper native screenshot size. How do I have to set up WinUAE to get 320x256 or 320x240 screenshots ?

15 June 2016, 10:28	#7
Predseda Puttymoon inhabitant Join Date: Mar 2007 Location: Tromaville Age: 46 Posts: 7,552	It is all about post-production. Just grab screenshots and then resize them externally. I use IrfanView batch functions.

15 June 2016, 11:55	#8
haynor666 retro maniac Join Date: May 2002 Location: Tarnobrzeg/Poland Age: 45 Posts: 1,753	I've menaged to set WinUAE to 320x256 somehow :]

15 June 2016, 13:13	#9
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,534	WinUAE 3.3 has config-file only screenshot size/position options. Check beta changelogs for details. It may help.

15 June 2016, 14:00	#10
Predseda Puttymoon inhabitant Join Date: Mar 2007 Location: Tromaville Age: 46 Posts: 7,552	BTW I opened this theme in February this year: http://eab.abime.net/showthread.php?t=81750

16 June 2016, 12:10	#11
haynor666 retro maniac Join Date: May 2002 Location: Tarnobrzeg/Poland Age: 45 Posts: 1,753	Ups, I missed this topic. Thanks guys

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