Home Menu/Themes

This page describes the formats/structure of the data stored in RomFS for Home Menu DLC, for themes.

Control Content

The control content has content-index 0. It's unknown what if any of this is Home Menu specific.

RomFS structure:

• "MetaDataContentHeader.bin": Unknown, size is 0x44-bytes.
• "ContentInfoArchive_<region>_<lang>.bin" Contains the list of all DLC content available under this DLC title(which can include DLC that's not yet accessible via the shop). <region> can be "USA", etc. <lang>, for the US title: "en", "es", "fr", and "pt".
• "icons/<decimal_id>.icn" Contains the raw DLC icon image data, without any header. 48*48 RGB565.

ContentInfoArchive entry format, size 0xC8(this file contains the following entry for each of the DLC content):

Relative offset	Size	Description
0x0	0x4	Content index - 1
0x4	0x4	0x0 = disabled, 0x1 = enabled.
0x8	0x40	char string for the title text.
0x48	0x88	char string for the description text.

The first entry is a "header": contentindex val=1, second word = <total DLC content excluding DLC control content>. The two strings are set to dummy text.

Theme Content

RomFS structure:

• "bgm.bcstm": Background music, see here.
• "body_LZ.bin": LZ11 compressed blob containing the rest of the theme data(graphics + optional CWAVs).

Decompressed body_LZ.bin structure

Offset	Size	Description
0x0	0x4	Version (Must be 1)
0x4	0x1	Unknown
0x5	0x1	0 = unknown, non-zero = unknown.
0x8	0x4	?
0xC	0x4	Must be <4.
0x10	0x4	Top Screen Frame Count (If 0 then solid color at 0x14, else texture at 0x18)
0x14	0x4	Offset for the top screen solid color data, with format RGB888.
0x18	0x4	Top Screen Texture offset (Rgb565 at (512*(Top Screen Frame Count))*240)
0x1C	0x4	?
0x20	0x4	Bottom Screen Frame Count, must be <4.
0x24	0x4	Bottom Screen Type (0=SolidColor, 2=Rgb565)
0x28	0x4	Bottom Screen Solid Color/Texture offset (Rgb565 at 256x240)
0x2C	0x4	Must be <2.
0x34	0x4	Must be <2.
0x3C	0x4	Must be <2.
0x48	0x4	Must be <2.
0x50	0x4	Must be <2.
0x4C	0x4	Must be <2.
0x64	0x4	Must be <2.
0x6C	0x4	Must be <2.
0x78	0x4	Must be <3.
0x80	0x4	Must be <2.
0x88	0x4	Must be <2.
0x90	0x4	Must be <2.
0x98	0x4	Must be <2.
0xA0	0x4	Must be <2.
0xA8	0x4	Must be <2.
0xB0	0x4	Must be <2. 1 = the word at offset 0xB4 is used, otherwise it's not used.
0xB4	0x4	Must be <=6.
0xB8	0x4	Must be <2. 1 = below audio data section is used, otherwise it's not used.
0xBC	0x4	Audio data section size, this must be <=0x2DC00.
0xC0	0x4	Offset for the audio data section.

The filesize is aligned to 0x10-bytes. The filesize must be at least 0xC4-bytes. The size of the above header is 0xD0-bytes(0xC4-bytes aligned to 0x10-bytes?).

Audio data section

Offset	Size	Description
0x0	0x4	Unknown
0x4	0x4	Unknown
0x8		Beginning of the audio data entries.

The audio data section contains the sound effects for this theme.

Audio data entry structure:

Offset	Size	Description
0x0	0x4	CWAV size.
0x4	0x4	Unknown
0x8		CWAV

In certain cases there may be more data starting at offset 0x8 than what's listed above, before the CWAV.

Built-in themes

The built-in themes are stored at Home Menu RomFS:/theme/<Color>_LZ.bin, the format appears to be the same as body_LZ.bin in the theme DLC content.