[TOOL][MOD][A12/A13] Unpack & repack OPlus splash image (logo.img) [LINUX][WINDOWS]

[AnierinB]

While researching about Run-length-encoding (RLE) and modifying the source code of the splash image tool for the OnePlus 6 series to be compatible with 8 series (which was starting to look promising), I ended up stumbling upon this GitHub repository for a tool that already accomplishes the unpacking and repacking process of logo.img for various OPlus (Oppo + OnePlus = OPlus) devices.

This has been tested on both OOS12 and OOS13 firmware. Compatibility with older versions of the logo.img from previous OOS versions (OOS11 and below) is unknown at the time of writing this.

Usage

Unpack oplus splash image:
./opsplash unpack -i orig-logo.img -o pic

Editing:
You'll want to make your edits to the output file named "boot". I noticed that if "boot" exceeds the default size it will not show up during power on and will instead display a black screen. It is advised to keep the bitmap file the same size or less to work properly.

Repack oplus splash image:
./opsplash repack -i orig-logo.img -o new-logo.img

Only read image info:
./opsplash readinfo -i orig-logo.img

Flashing
This will need to be done in fastbootd rather than fastboot (bootloader), since regular fastboot (bootloader) prevents flashing critical partitions.

Original logo:
fastboot flash --slot=all logo orig-logo.img

New logo:
fastboot flash --slot=all logo new-logo.img

Side note:
I seem to have found some rather unusual images in the logo.img for instantnoodlep. You'll just have to unpack it and see for yourself -_-

 

[AnierinB]

Reserved

 

[deepongi]

made this one, looks good. logo.img in attachment, plus original bmp, remove the *.pdf extension (xda impose upload rules)

 

[halloweenm925]

why do i keep getting this error my stock boot.bmp is 7.41 MB
the one i want to replace is 6.67 mb

but i keep running to this error

whould you know why?

 

[Rootk1t]

why do i keep getting this error my stock boot.bmp is 7.41 MB
the one i want to replace is 6.67 mb

but i keep running to this error

whould you know why?

Your bmp file does not pass checks:
1. You bmp file header is doesn't equal to 0x36.
2. BMP file itself seems to be wrong or corrypted.
Also try to rename it to contain no spaces in filename.