Minor image centering bug in Double & Scanlines display setting

xxxxx · 01 December 2014, 17:54

I know this is minor, but I'd rather post it anyway, if it is quick to fix. As was discussed in detail recently on ADA and on EAB, the maximum display height is 287 pixels (286 regular lines plus one that can only show background color). As a control freak, I of course want to watch every pixel on the screen. But in WinUAE i came across this thing:

In windowed mode, when setting the display to double or scanline, and the height is set to 574 (2*287), the image is offset a single pixel too high. This leaves a single black line at the bottom of the window that I wouldn't have expected there.

When setting the display to single, and setting the height to 287, the image is perfectly centered, as I expect.

Toni Wilen · 01 December 2014, 20:32

Thanks, fixed. (off by one in internal buffer height calculation)

xxxxx · 02 December 2014, 02:05

Thank you. Looking forward to it :-)

Toni Wilen · 02 December 2014, 20:30

http://www.winuae.net/files/b/winuae.zip already includes it if you want to play dangerous

xxxxx · 07 December 2014, 09:17

This works great. I will happily live life on the edge for a one pixel offset :-)

01 December 2014, 17:54	#1
xxxxx Registered User Join Date: Jan 2012 Location: N/A Posts: 38	Minor image centering bug in Double & Scanlines display setting I know this is minor, but I'd rather post it anyway, if it is quick to fix. As was discussed in detail recently on ADA and on EAB, the maximum display height is 287 pixels (286 regular lines plus one that can only show background color). As a control freak, I of course want to watch every pixel on the screen. But in WinUAE i came across this thing: In windowed mode, when setting the display to double or scanline, and the height is set to 574 (2*287), the image is offset a single pixel too high. This leaves a single black line at the bottom of the window that I wouldn't have expected there. When setting the display to single, and setting the height to 287, the image is perfectly centered, as I expect.

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01 December 2014, 20:32	#2
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,502	Thanks, fixed. (off by one in internal buffer height calculation)

02 December 2014, 02:05	#3
xxxxx Registered User Join Date: Jan 2012 Location: N/A Posts: 38	Thank you. Looking forward to it :-)

02 December 2014, 20:30	#4
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,502	http://www.winuae.net/files/b/winuae.zip already includes it if you want to play dangerous

07 December 2014, 09:17	#5
xxxxx Registered User Join Date: Jan 2012 Location: N/A Posts: 38	This works great. I will happily live life on the edge for a one pixel offset :-)

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