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Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-10-18, 20:43

Strange situation about Spellcasting 101 and its EGA resolution (640x350), i somehow prefer openglnb mode aspect ratio despite garbled pixels The situation is not favourable for the patch: the game's resolution is relatively large(640x350), the pixel aspect ratio (1.37) highly incommensurable, and …

Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-09-09, 19:45

ZakMcKracken , No, I don't think that such a specific scaler is within the scope of the generic library that is SDL . It should be implemented in DOSBox , preferably as a pixel shader. Upgrading to the latest SDL seems to me a task of medium difficulty. By the way, the new SDL supports hardware- …

Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-09-05, 11:37

Interesting, still looks good to me (screenshots were taken in opengl graphics mode) Here is screenshot in Normal (no scaling) graphics mode. Снимок экрана (173).png It has some extremely rude glitches in the vertical direction. Just compare it with the original . Look, for example, at the "Options …

Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-09-05, 10:55

That is your opinion. The misleading use of the term pixel-perfect for something that is not so, is not a matter of opinion. The term pixel-perfect refers to sharp, regular pixels of identical size undistorted by any interpolation. I find wrong aspect ratio to be terribly jarring, for example. …

Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-09-05, 10:21

Wouldn't pixel-perfect scaling of 320x200 using square pixel flat panels result in wrong aspect ratios? It is possible but not necessary. My patch, for example, will try to keep the right aspect ratio or at least to minimise the error. It can use 4:5 scaling (with a 4% error is aspect ratio) or 5:6 …

Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-09-05, 09:24

@ant_222, here you go, btw, screenshots from latest ScummVM build (aspect correction on, 1080p) Bad news: both the screenshots use nearest-neighbor interpolation and have irregular pixel magnification, which means that the ScummVM developers not only have failed to implement pixel-perfect scaling, …

Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-09-04, 20:43

I do not see such an argument. An efficient implementation is actually possible even with the obsolete SDL 1.2 that the official DOSBox uses, if one takes advantage of the built-in nearest-neighbor scaling in OpenGL mode and confines the output area to one whose size is a multiple of the original …

Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-09-04, 11:15

ScummVM has added pixel-perfect mode (in daily builds) a year ago, i guess. Works as intended Please, post several ScummVM screenshots of different sizes taken in pixel-perfect mode. I will tell you the algorithm. My understanding from Ant's explanation is that openglnb applies the same 'duplicate …

Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-09-03, 22:18

Please don't stop. I will try... Your patch is one of the main reasons I continue to use DOSBox over ScummVM (btw, does ScummVM have anything similar to the pixel perfect patch at this point, or is the PAR still messed up when playing games with ScummVM?) I think not, and it is very strange that …

Re: DOSBox ECE (for Windows & Linux)

Posted on 2019-08-26, 12:53

I think that a minimal English page with a list of features/patches and a download URL would be very good. If you have a constant link to the latest version of the patch, I can host such a page myself and also link to it from the title post of the Pixel-Perfect thread.

Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-08-24, 15:31

Are there any builds for OSX that has this patch included? It’s awesome on Windows. I am very glad you like it, but don't know of any OS X build with my patch. Currently I see three ways to pixel-perfect display in DOSBox : A pixel shader for pixel-perfect scaling, BladeSk's patch , and My patch. I …

Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-08-12, 10:06

Unfortunately, the Vsync option wasn't the culprit, the problem persist with the attached build. I'll try to record the problem and ask in the OBS forums, though I doubt they'll have a solution without OBS showing an errr. But who knows? Thank you. OBS is open-source. If they are very kind to us, …

Re: DOSBox ECE (for Windows & Linux)

Posted on 2019-08-07, 20:53

I can see some loss in brightness (and maybe contrast), but no blur. Maybe the slightest hint of blur, but nothing I'd actually recognize as blur without constantly switching between the two images. I took two screenshots of a 320x200 game scene at 1440p and bumped the brightness and contrast with …

Re: VIDEO Patch for pixel-perfect scaling (SDL1)

Posted on 2019-08-01, 21:05

I could try but the log files of OBS shows no errors, so it'll be as hard to diagnoe ofr them as it is for you. Not quite, for they can investigate the problem from the other side and see what happens inside OBS that prevents proper video capture. And yes, the thought that the problem came up when …

Re: DOSBox ECE (for Windows & Linux)

Posted on 2019-07-29, 20:20

YP80, have you seen my question in the thread for the pixel-perfect patch, where I ask if you can contact the OBS guys and kindly ask them to diagnose the freezing during at resolution switch? Even if they can't solve it, maybe they can suggest what I should look for in the DOSBox code...

Re: DOSBox ECE (for Windows & Linux)

Posted on 2019-07-29, 20:10

That is what surfacenp does, albeit slowly. But I dislike the result because of interpolative artefacts and am of the opinion that the one true way of upscaling pixel-art is by integer scaling without any subsequent interpolation. Oops, I missed that. Yep, it indeed does. It looks very clear to me …

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