1.5 Web Browser...

Ok, next optimisation: CLUT tables.
The engine now supports T8 clut table rendering, meaning that we can quarter RAM usage again. T8 clut tables work by using a single char to represent a value 0-255 which is stored on a table, instead of 4 char values 0-255 for A,R,G,B.
Gif files natively only support a maximum of 256 colours, which makes them a prime candidate for this optimisation:
http://i8.photobucket.com/albums/a4/...lutexample.jpg
These are two gif files (one has transparency, the other does not). Both these gif files are using 1/4 the RAM of before, with no colour loss.

So we know, I haven't dropped off the face of the earth. I just (a week a ago) took a new job in california (was in NC), and I left my PSP with my brother in NC. Once I get settled in here, and a new psp, development will resume.

Thanks,
Michael

That's good to hear, planetusa.
Be careful when selecting your new PSP though, as you'll need 1.5, and only some 2.6 PSPs are downgradable, the newer 2.6 ones have different hardware that would brick on downgrading. See forums for advice on this.


In other news, I've done another optimisation. I now have jpeg images optimised to use a CLUT palette. This almost quarters RAM usage once more:
http://i8.photobucket.com/albums/a4/...sionsample.jpg
Note that the +1KB is for the palette, which is an array of 256 ints, totalling 1024bytes.
This means that from the unoptimised version of 64KB, it can be reduced to 5KB - almost a 1/16th of the original usage!
The image used in the example is not very big nor colourful, other images may lose colour when reduced to 256 colours.

This procedure uses the jpeg's built in quantiser, which means that the palette is optimised for each image, giving the best image quality for 256 colours. The png library does not have such a function, so it is likely i'm going to have to code my own.

I've only just got 'Dev status', but have been watching this topic since it was created, so I'd just like to wish you good luck with it and congratulate you on the amazing work so far. :)

OK cool, you're really gonna start making some progress now!

Just an update.
Still working on getting quantization working for .png files. I've got a floyd-steinberg dither working, but it's getting a palette from the image which is proving troublesome. I've tried to use a neural net quantizer from the internet, but it doesn't want to work for me, whatever the settings.

Any updates on this?

AT told me it was on hold temporarly... he also told me they are about 60% through the project.

nice - this will be good by the sounds of it.

So what are they on now? Or is it still on hold?

Actually, I've been beavering away on a new build of the core engine over the past month. The engine has been re-coded from the ground up for stability and to make it more likely to actually reach final release.
When I'm ready, I'll make a new thread, detailing the new additions and the features I've axed in order to make it viable.

Zitat:

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Zitat von AnonymousTipster

Actually, I've been beavering away on a new build of the core engine over the past month. The engine has been re-coded from the ground up for stability and to make it more likely to actually reach final release.
When I'm ready, I'll make a new thread, detailing the new additions and the features I've axed in order to make it viable.

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is it going to be better than the 3.0 Browser

Any kind of time estimate?

Zitat:

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Zitat von Chump Bucket Soda

is it going to be better than the 3.0 Browser

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It will be better in some aspects, but worse in others. For example, Eclipse won't be able to support flash like the 3.0 browser. Does the 3.0 browser still stop you from browsing when downloading? I haven't tried it yet, but Eclipse should allow asynchronous downloading :)

Zitat:

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Zitat von Glynnder

Any kind of time estimate?

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No idea, still. :(

Thanks for the update

is the 3.00 browser any different to the 2.71 one

Discussion has now been moved to the new development thread (not a release thread).

http://forums.qj.net/f-developers-du...ead-84692.html