The BFLIM file format (Binary caFe Layout IMage) is used to store layout images.

Header

The header is at the end of the file (to align the image data without the need for additional padding). It is always 0x14 bytes.

Offset	Size	Type	Description
0x00	4	Char[4]	File magic. Always FLIM in ASCII.
0x04	2	UInt16	Byte Order Mark (BOM): 0xFEFF for big endian and 0xFFFE for little endian. Not handled on consoles, so the file data must be stored in the endianness of the target console (e.g. big endian for the Wii U).
0x06	2	UInt16	Header size, always 0x14.
0x08	4	UInt32	Version of this file.
0x0C	4	UInt32	File size in bytes.
0x10	2	UInt16	Number of data blocks, always 0x01.
0x12	2	UInt16	Padding. Seems to reflect upper 2 bytes of filesize (apparently uninitialized memory garbage from file generator).
0x14	End of FLIM header

Image Information

A section containing image information comes directly after header. It is always 0x14 bytes long.

Offset	Size	Type	Description
0x14	4	Char[4]	Section magic. Always imag in ASCII.
0x18	4	UInt32	Parse information size (total block size), always 0x10 (this and next 0xC bytes).
0x1C	2	UInt16	Width of the texture in pixels.
0x1E	2	UInt16	Height of the texture in pixels.
0x20	2	UInt16	File alignment, always a power of 2.
0x22	1	Byte	Format, how the data is stored.
0x23	1	Byte	Tile mode and Swizzle, packed as bits SSSTTTTT. TTTTT maps to GX2TileMode (line 795 here). Typically GX2_TILE_MODE_2D_TILED_THIN1 (4). SSS is the initial swizzle value. Could be anything from 0 to 7.
0x24	4	UInt32	Raw data size, always 0xC minus 0x28 (the header).
0x28	End of Image header

ID	Name	Type	Bits Per Pixel (BPP)
0x00	L8_UNORM	Luminance	8
0x01	A8_UNORM	Alpha	8
0x02	LA4_UNORM	Luminance + Alpha	8
0x03	LA8_UNORM	Luminance + Alpha	16
0x04	HILO8	?	16
0x05	RGB565_UNORM	Color	16
0x06	RGBX8_UNORM	Color	32
0x07	RGB5A1_UNORM	Color + Alpha	16
0x08	RGBA4_UNORM	Color + Alpha	16
0x09	RGBA8_UNORM	Color + Alpha	32
0x0A	ETC1_UNORM	Color	4
0x0B	ETC1A4_UNORM	Color + Alpha	8
0x0C	BC1_UNORM	Color + Alpha	4
0x0D	BC2_UNORM	Color + Alpha	8
0x0E	BC3_UNORM	Color + Alpha	8
0x0F	BC4L_UNORM	Luminance	4
0x10	BC4A_UNORM	Alpha	4
0x11	BC5_UNORM	Red + Green + Alpha	8
0x12	L4_UNORM	Luminance	4
0x13	A4_UNORM	Alpha	4
0x14	RGBA8_SRGB	Color + Alpha	32
0x15	BC1_SRGB	Color + Alpha	4
0x16	BC2_SRGB	Color + Alpha	8
0x17	BC3_SRGB	Color + Alpha	8
0x18	RGB10A2_UNORM	Color + Alpha	32
0x19	RGB565_INDIRECT_UNORM	Color?	16

The following tools can handle BFLIM files: