Hi
How can I replace the logo displayed on boot with my custom logo?In the SDK, kernel folder there are 2 logo.bmp files.
You can just replace them and rebuilt the firmware.
It’s easier to just use one logo and rename the other one so it’s not loaded to decrease the boot time.
Replacing existing firmware logo is not that easy.
In the past you could just unpack the resource.img file and then put your own logo in there, repack it and flash this single partition back. But I think from Android Pie onwards it doesn’t work that way anymore since the resource partition is merged with the boot.img partition.
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@mo123 I have a resource partition in my partition table, how can I dump the resource partition from u-boot?
kedge# mmc dev 0
switch to partitions #0, OK
mmc0(part 0) is current device
kedge# mmc part
Partition Map for MMC device 0 -- Partition Type: EFI
Part Start LBA End LBA Name
Attributes
Type GUID
Partition GUID
1 0x00004000 0x00005fff "uboot"
attrs: 0x0000000000000000
type: 5c7fe954-4a32-4378-bda0-de3a12c6ede6
guid: 94b7f94f-f139-4115-c74f-afbb0d23b695
2 0x00006000 0x00007fff "trust"
attrs: 0x0000000000000000
type: b3e4ae7e-305f-400b-ca48-82e510904ad0
guid: bd479d09-ba16-483f-d4d3-c5c50b443ec5
3 0x00008000 0x00009fff "misc"
attrs: 0x0000000000000000
type: 63d33208-b649-44ee-ff27-11dc7febd9f2
guid: 3ba82700-2214-400e-adb7-c35c57c18419
4 0x0000a000 0x00011fff "resource"
attrs: 0x0000000000000000
type: f5300126-805f-4cac-ea72-5a297d358213
guid: e8e7a655-da71-4099-d054-ea342a9f1b77
5 0x00012000 0x00021fff "kernel"
attrs: 0x0000000000000000
type: 0528581c-e623-4bfe-bcd8-6aa22b802173
guid: d3b79b2c-d156-4f12-db5d-e39e34158d49
6 0x00022000 0x00023fff "dtb"
attrs: 0x0000000000000000
type: a92ea12c-085d-42af-f5a6-c6484437f6d5
guid: 4447ff57-ee49-4eb9-e3e9-b69b7d75f306
7 0x00024000 0x00025fff "dtbo"
attrs: 0x0000000000000000
type: cd9ddf18-7b61-4d9e-b11b-e7476e0d8cec
guid: f62ed426-c03f-4c36-ee06-48043f410bb9
8 0x00026000 0x000267ff "vbmeta"
attrs: 0x0000000000000000
type: c3abcc5d-b46b-4c80-bf85-ccb7294839e3
guid: 345db86b-5432-42df-9349-f8052ee6d9b4
9 0x00026800 0x000367ff "boot"
attrs: 0x0000000000000000
type: fa6e9d36-8154-4300-f115-7969478d717e
guid: 48abba1f-4b7e-4441-b4b1-959025add8ee
10 0x00036800 0x000567ff "recovery"
attrs: 0x0000000000000000
type: e58d7c06-a81a-4542-8c02-2c5367dbd2b2
guid: 54f5f33a-790f-44b4-cc53-d3983dbc9a75
11 0x00056800 0x0008e7ff "backup"
attrs: 0x0000000000000000
type: 8a72504f-a608-49b6-bddc-94a52d6b6a59
guid: acbda654-0550-4cac-9964-b8f1641725f1
12 0x0008e800 0x000907ff "security"
attrs: 0x0000000000000000
type: bb468d28-cd44-4645-b0ea-9c6321284d83
guid: 3a17a757-c452-4607-cf43-b21f2e038d34
13 0x00090800 0x001907ff "cache"
attrs: 0x0000000000000000
type: 4fc03513-3a18-4377-80bb-10e453c44ad8
guid: ec7f8355-d771-4823-ea7b-d79d3260e6a5
14 0x00190800 0x006907ff "system"
attrs: 0x0000000000000000
type: 1fd65b5e-7a46-4ab9-f85a-b2905465fdba
guid: f27a696f-bf63-49ec-bc5e-a12a6f0b3a61
15 0x00690800 0x006987ff "metadata"
attrs: 0x0000000000000000
type: 5e6ba34c-384a-4a6e-eaed-3f194135aa99
guid: 0000df51-101f-4404-c90e-54e43d613ea3
16 0x00698800 0x007987ff "vendor"
attrs: 0x0000000000000000
type: ff3c7352-3550-45c4-b8e0-d6ee732d6561
guid: 9eb6201c-cf71-419f-e31a-e1a66154eccf
17 0x00798800 0x008987ff "oem"
attrs: 0x0000000000000000
type: 3a27f847-173d-4656-9aa3-86ff2f782cfd
guid: 67bd5456-0e48-4caa-813b-8dbd7175fb6a
18 0x00898800 0x00898bff "frp"
attrs: 0x0000000000000000
type: 3c0dca3e-7d13-4d11-f3b2-32f379a89100
guid: cf7b575b-fb15-47de-9020-d398145bd4d1
19 0x00898c00 0x03a3dfde "userdata"
attrs: 0x0000000000000000
type: befbe875-8b32-4e03-9fc9-14d60446fef6
guid: 16b7bd2d-b519-4da0-f1c7-b1b962d36d1fYou can load the firmware image into AndroidTool v2.6x-v2.69, last tab in Windows and click Unpack to split the firmware into the different partitions. In Linux in the rockdev folder the is also an unpack.sh script.
You can then flash the changed resource.img back with the 1st tap of AndroidTool, click the bottom ‘Dev’ button to read the offsets of the partitions and check the boot partition checkbox and load your changed resource.img.
Send me your logos and resource.img then I can change it for you.
This will work with Nougat but for Pie, I think the images are stored in the boot.img or part of the system which can’t be modified. But send the link of the whole firmware too you use, maybe I can try to change it.
AndroidTool also have a useful dump image.
In the last tab, you put in the offset for the partition and the size which you can get from the parameter.txt file you can also dump.
Here is a guide:
Some other firmware dump utility:
https://forum.xda-developers.com/showthread.php?t=2749082
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