Rockbox

I like the idea.
i white blank screen at maximum brightness would be useful as a plugin.

Try this. I don’t know if it really works, I haven’t tried. I don’t use it myself. It only tooks ~2-3 minutes to implement it. It turns on the blacklight, set the background to white. Press any button to quit. That’s all.

   flashlight.patch (3.1 KiB)

I can try it, but I’ll need to learn how to apply patches to Rockbox.

As an alternative, if you run the RockPaint application, it opens with a white screen by default, so maybe the need for this isn’t as great as originally thought.

However, I do still like the flashlight application idea.

I love the idea, I’m going to try using this patch if I can figure out how to implement it. Sorry, Vuong, but you’re talking to a bunch of people who don’t really know what we’re doing, haha.

I’ll update with information if I get it to work. If it does, I’d love to try changing it around to different colors. I play around with photography and would kill for something like this if it works out.

Another benefit of this would be the option to turn the scrollwheel on, as a lot of users turn it off. Therefore a white background (with maximum brightness) and a blue scrollwheel come in handy when there’s no electricity (like in my country, 3 days without power).

Uploaded a new version, which changes (if possible) the brightness to the highest value to increase the flashlight’ablity even more :)

   flashlight_v2.patch (4.4 KiB)

This looks like a pretty useful plugin, especially if there’s a blackout and you don’t have a real flashlight handy. :)

Will try to compile it with one of my DAPs.

Ok, this one should actually work when one has a backdrop set. Also, I cleaned the code up a little and changed the header properly.

Tested on e200.

   flashlight_v3.patch (4.8 KiB)

After some fun discussions in IRC and some boredom I’ve extended this plugin. Now it contains something to adjust the colour. There was kind of a request to be able to select a red light (night vision) so you can continue seeing things in the dark after using it (e.g. for viewing starmaps and such at night).

Usage:
To change the colour on targets with a colour display use the left and right buttons (and the touch wheels, pads, scroll wheels where available). Any other button quits the plugin.

On targets without a colour display simply press/touch any button to quit the plugin.

Tested on iPod Video.

Note: The algorithm used to convert a hsv color to a rgb one probably can be optimized, because i didn’t really used the value and saturation values. But i wasn’t that bored ;-P

   flashlight_v4.patch (8.8 KiB)

Oops… I broke the non colour targets.

   flashlight_v5.patch (8.9 KiB)

The latest version yields the following for me:

$ patch –dry-run -p0 <flashlight_v5.patch
patching file apps/plugins/CATEGORIES
Hunk #1 succeeded at 96 (offset 1 line).
patching file apps/plugins/SOURCES
patching file apps/plugins/flashlight.c
patch: malformed patch at line 227:

Is that an “ignorable” error?

No, malformed patches means that the diff contains wrong info. I.e. @@ +1,7 -1,7 @@ means that it deletes 7 lines of the original and writes 7 into it (6 of those don’t differ). That’s the header of each hunk. But, if the body wants to delete 8 lines and write 9 lines, the header and the body dismatch, resulting in a malformed patch.

I suggest you to read some tutorials about diff.

Oh, yea, and malformed patch results in not applying cleanly (all hunks including and after the faulty line are not applied at all). So, it’s definitely not ignorable.

Resync (r17055)

   flashlight_v6.patch (2.4 KiB)

I forgot to svn add. Sorry

Whoever considers to commit it: I haven’t bumped the plugin api since it changes often and i don’t want to sync this patch everytime something changes. So you’d have to do it before committing

   flashlight_v7.patch (8.9 KiB)