[How to] ++ Modify BootImage (HelloMoto picture) ++

[eakrin]

License : Distributed and use for free and Personal use only. don't use for commercial

Boot Image is a first image that appear before splash animation display when power on phone. It is a GIF 89a image encoded to smg file. pack/unpackBootImage.pl is perl scripts that use to packing and unpacking gif image from and into smg file.

Requirements.
1. Perl Interpreter from ActivePerl
2. pack/unpackBootImage.pl from here.

How to unpack bootimage.smg to gif image.
1. rename cg file to bootimage.smg
2. put pack/unpackBootImage.pl into the same folder as bootimage.smg.
3. double click on unpackBootImage.pl to extract smg file.
4. 2 files should apprear in bootimage folder. bootimage.gif and cgversion.txt bootimage.gif is a gif image file. cgversion.txt is a text file that indicated version of your cg.

How to pack gif image to bootimage.smg
1. check in bootimage folder that It have bootimage.gif and cgversion.txt.
2. double click on packBootImage.pl
3. new bootimage cg file should be in new_bootimage.smg.

PS. you can get bootimage.smg from firmware by use sbf codec extract cg39 from E6 and A1200 f/w.

cheer!
eakrin

** I tested on my A1200. It's ok **
++ thank to Imahottguy for how to edit this cg ++

I forgot to tell Bootimage file structure.
CG39 (A1200, E6) have 131072 bytes size (128k). It contain
1. 2048 bytes of FF
2. GIF89a image file.
3. FF chars (between end of gif and text)
4. CG version text.

[GreenHorn]

For A780 too??

There is it cg37!? And it´s a ".img.gz"-file!?

[eakrin]

I cannot extract E680i/ A780 f/w. so If It structure like I said above. so It can use. try looking at A780's cg37 with Hex Editor. or send it ot me.

but I think It should be the same structure.

[GreenHorn]

http://www.motorolafans.com/forums/viewtopic.php?t=592

The cg37 and the gif I like to convert. The link is a little help. I have tried, but it shows only 8 colors or the phone didn´t boot..

[DAGr8]

I figure this means I could replace cg39 with CG39 I get form doing this and f.w would work perfect right ?


Simply awesome !!

[eakrin]

http://www.motorolafans.com/forums/viewtopic.php?t=592

The cg37 and the gif I like to convert. The link is a little help. I have tried, but it shows only 8 colors or the phone didn´t boot..

your file is too large for bootimage cg. It's only 128K in size. you need to cut only 1st frame for create a bootimage cg. and use all of them to create splash for continuous startup animation.

[GreenHorn]

Yes. I have it done, but as I say. If it boot it has only 8 or 16 colors..
But I tried it with 'KolourPaint' on KDE!?

[telectroguy]

im having a rokr e6 can ive packed the cg39 with the new boot image and replaced the old cg39 and compled the sbf file using the sbf codec...and flashed it plashing=success but my phone wont start can u tell me hoe to replace the original cg39....with the modded one...............

[MANUP456]

Once i edit the file how do i put the firmware back together?O.k i got flashed restart nothing.Where can i get some 240x320 128k gif images?

[Konig]

The issue here is that when u flash the sbf file, CG39 will have to be exactly 131072 bytes. In order to do this, you will need to insert blocks of FF characters in there using a hex-editor. Ill see if i can put together a more detailed guide later today. Its time consuming to get it right if u use this procedure. Honestly, the mtd tools method is faster, but whatever rocks ur boat