Online Screen Saver refresh problem

hellogareth · 08-15-2021, 11:43 AM

Hi there.

Thanks to everyone who has contributed towards the plugins in question. I am having some trouble with the Online Screen Saver. I was hoping maybe someone could point me in the right direction.

I am using a PW2 5.12.2.1.1.

I am updating a single PNG image from a Firebase storage bucket that overwrites the 'bg_ss00.png' in the 'screensavers' folder. The image renders correctly on first load, but when it refreshes it renders a black rectangle over the top two thirds of the screen - which does show some of the updated image data.

The image is being rendered using HTML5 canvas and creates a base64 url that get's encoded to a PNG file (768 x 1024).

I'm not sure if this is something I am doing wrong with the encoding of the image, or some eips config that I need to tweak.

Thanks.
Gareth

NiLuJe · 08-15-2021, 03:19 PM

eips (and the native framework) are very capricious about hwo the image has to be encoded (... and they both have different quirks).

Check how the ScreenSavers's hack cover mode encodes 'em for all the gory details (because I don't actually remember them all xD).

hellogareth · 08-16-2021, 04:52 PM

Quote:

Originally Posted by NiLuJe

eips (and the native framework) are very capricious about hwo the image has to be encoded (... and they both have different quirks).

Check how the ScreenSavers's hack cover mode encodes 'em for all the gory details (because I don't actually remember them all xD).

Great. Thanks, NiLuJe. I'm using a PNG encoder to simplify the process as image encoding from canvas for this very specific case is beyond me. The visual artefacts are mostly resolved - just need to work out a scaling bug, it seems!

08-15-2021, 11:43 AM	#1
hellogareth Junior Member Posts: 5 Karma: 10 Join Date: Aug 2021 Device: PW2	Online Screen Saver refresh problem Hi there. Thanks to everyone who has contributed towards the plugins in question. I am having some trouble with the Online Screen Saver. I was hoping maybe someone could point me in the right direction. I am using a PW2 5.12.2.1.1. I am updating a single PNG image from a Firebase storage bucket that overwrites the 'bg_ss00.png' in the 'screensavers' folder. The image renders correctly on first load, but when it refreshes it renders a black rectangle over the top two thirds of the screen - which does show some of the updated image data. The image is being rendered using HTML5 canvas and creates a base64 url that get's encoded to a PNG file (768 x 1024). I'm not sure if this is something I am doing wrong with the encoding of the image, or some eips config that I need to tweak. Thanks. Gareth

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08-15-2021, 03:19 PM	#2
NiLuJe BLAM! Posts: 13,506 Karma: 26047190 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	eips (and the native framework) are very capricious about hwo the image has to be encoded (... and they both have different quirks). Check how the ScreenSavers's hack cover mode encodes 'em for all the gory details (because I don't actually remember them all xD).

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