Rotate feature should be added to JPEG viewer.

[MajiKool Dragonâ„¢]

i'd like to see the ability to rotate images very much.

so i can rotate images to more efficiently fit the screen.

[MajiKool Dragonâ„¢]

i would like to bring this topic back to life because, i've talked to several of my rockbox user friends, and they all agree this feature is much needed.



i might actually try to code this one my self! yay   (though i'd rather someone who actually knows how to do it to do it)
just tell me what exactly i need to do... and hopefully at some point i might actually figure out how to do it.

[saratoga]

just tell me what exactly i need to do... and hopefully at some point i might actually figure out how to do it.

Take the output of the JPEG decoder and flip the rows and columns as needed to rotate the image.  Not much else to it.

[MajiKool Dragonâ„¢]

ahhh.... and how do i do that


also i'm not quite sure what you meant but i would like to be able to rotate the image within the viewer on the go

[Chronon]

Basically, you want to transpose the data.  I don't know C very well, so I don't know the most efficient way of doing this, but that's the game here.  Take the first row and turn it into the first column, etc.

[saratoga]

ahhh.... and how do i do that


also i'm not quite sure what you meant but i would like to be able to rotate the image within the viewer on the go

I'm guessing this is probably not something you're going to be able to do yourself then.

[robin0800]

Don't expect it helps, but there is a rotate display menu item for the Sansa C250, not sure if this is hardware or software. The OF doesn't have this.

[MajiKool Dragonâ„¢]

Don't expect it helps, but there is a rotate display menu item for the Sansa C250, not sure if this is hardware or software. The OF doesn't have this.

no... doesn't really help...

that only flips it upside down.

ahhh.... and how do i do that


also i'm not quite sure what you meant but i would like to be able to rotate the image within the viewer on the go

I'm guessing this is probably not something you're going to be able to do yourself then.

ya.... i might try. but ya...

[gratt]

I added a rotate option to the jpeg viewer FS#9497
It is tested on sansa e200 and should work on colout targets.
More work is required for Zoom and moving around pictures.

Credit to Rene Peinthor and Adam Gashlin with additions by me
for the rotate function from sansa_video.patch FS# 6675

GRaTT

[MajiKool Dragonâ„¢]

awesome...
good work

thanks! 


edit:
hope this gets accepted into official build