PRI file format

makepri.exe is a limited, closed-source command-line tool and the PRI file format is not documented. This is an attempt at making UWP resource editing possible beyond what the original tooling supports. Lots of half-baked reverse engineering notes in here for yet another project I probably will never finish. Feel free to dig into it, it's all experimental stuff for now.

resources.pri

18911528 bytes (0x01209128) checksum: 1912541329 (0x71FF1091)

Header

6D 72 6D 5F 70 72 69 32 "mrm_pri2" (8 bytes) 00 00 01 00 28 91 20 01 total file size (18911528 bytes) 20 00 00 00 header size (32 bytes) 20 15 00 00 A8 00 FF FF checksum? 00 00 00 00

Body

5B 6D 72 6D 5F 64 65 63 6E 5F 69 6E 66 6F 5D 00 "[mrm_decn_info]" (16 bytes) 00 00 00 00 00 00 00 00 00 00 00 00 18 11 00 00 (4376)

5B 6D 72 6D 5F 70 72 69 64 65 73 63 65 78 5D 00 "[mrm_pridescex]" (16 bytes) 00 00 00 00 00 00 00 00 18 11 00 00 (4376) 90 01 00 00 (400)

5B 6D 72 6D 5F 70 72 69 64 65 73 63 65 78 5D 00 "[mrm_pridescex]" (16 bytes) 00 00 00 00 00 00 00 00 90 01 00 00 (400) 00 00 00 00

02 00 FF FF 00 00 01 00 01 00 01 00 03 00 00 00 A4 00 00 00 02 00 00 00 03 00 04 00 05 00 06 00 07 00 08 00 09 00 0A 00 0B 00 0C 00 0D 00 0E 00 0F 00 10 00 11 00 12 00

5B 6D 72 6D 5F 68 73 63 68 65 6D 61 65 78 5D 20 "[mrm_hschemaex] " (16 bytes) 00 00 00 00 00 00 00 00 A8 12 00 00 30 D5 00 00

5B 6D 72 6D 5F 68 73 63 68 65 6D 61 65 78 5D 20 "[mrm_hschemaex] " (16 bytes) 00 00 00 00 00 00 00 00 30 D5 00 00 00 00 00 00

01 00 25 00 1A 00 00 00

5B 6D 72 6D 5F 72 65 73 5F 6D 61 70 32 5F 5D 00 "[mrm_res_map2_]" (16 bytes) 00 00 00 00 00 00 00 00 D8 E7 00 00 60 6C 01 00

5B 6D 72 6D 5F 72 65 73 5F 6D 61 70 32 5F 5D 00 "[mrm_res_map2_]" (16 bytes) 00 00 00 00 00 00 00 00 60 6C 01 00 00 00 00 00 00 00 00 00 02 00 00 00 00 00 07 00 01 00 01 00 05 04 00 00 78 2B 00 00 00 00 00 00 00 00 00 00 04 00 00 00 00 00 00 00 04 00 00 00 01 00 00 00 04 00 00 00 02 00 00 00 04 00 00 00 03 00 00 00 04 00 00 00 04 00 00 00

5B 64 65 66 5F 68 6E 61 6D 65 73 78 5D 20 20 00 "[def_hnamesx]" (16 bytes) 01 00 00 00 00 00 00 00 99 C5 BC F3 C0 01 00 00

Data

5B 6D 72 6D 5F 64 61 74 61 69 74 65 6D 5D 20 00 "[mrm_dataitem] " (16 bytes) 00 00 00 00 00 00 00 00 38 54 02 00 (152632) E0 0A 00 00 (2784)

5B 6D 72 6D 5F 64 61 74 61 69 74 65 6D 5D 20 00 "[mrm_dataitem] " (16 bytes) 00 00 00 00 00 00 00 00 E0 0A 00 00 (2784) 00 00 00 00 (0)

5B 6D 72 6D 5F 64 65 63 6E 5F 69 6E 66 6F 5D 00 "[mrm_decn_info]" (16 bytes) 00 00 00 00 00 00 00 00 18 11 00 00 data size 00 00 00 00

offset: 0x1520 (5408), length: 0x1118 (4376)

Definitions

5B 64 65 66 5F 68 6E 61 6D 65 73 78 5D 20 20 00 "[def_hnamesx]" (16 bytes) 01 00 00 00 00 00 00 00 99 C5 BC F3 C0 01 00 00 (448)

05 04 00 00 (1029) "ms-appx://Microsoft.WindowsTerminal/Microsoft.WindowsTerminal" 6D 00 73 00 2D 00 61 00 70 00 70 00 78 00 3A 00 2F 00 2F 00 4D 00 69 00 63 00 72 00 6F 00 73 00 6F 00 66 00 74 00 2E 00 57 00 69 00 6E 00 64 00 6F 00 77 00 73 00 54 00 65 00 72 00 6D 00 69 00 6E 00 61 00 6C 00 2F 00 00 00 4D 00 69 00 63 00 72 00 6F 00 73 00 6F 00 66 00 74 00 2E 00 57 00 69 00 6E 00 64 00 6F 00 77 00 73 00 54 00 65 00 72 00 6D 00 69 00 6E 00 61 00 6C 00

00 00 00 00 90 00 00 00 (144) *** C5 05 00 00 (1477) C0 01 00 00 (448)

05 04 00 00 (1029) 00 00 00 00 58 D4 00 00 (54360) *** F1 78 00 00 (30961) 00 00 00 00 00 00 00 10 00 00 00 00 00 00 05 00 46 00 05 30 1D 00 03 00 00 00 1A 00 4D 00 1A 30 ED 31 A9 01 00 00 22 00 4D 00 22 30 B9 0A 66 00 00 00 21 00 4D 00 21 30 8D 0A 64 00 00 00 25 00 4D 00 25 30 51 00 08 00 00 00 11 00 4D 00 11 30 01 00 01 00 00 00 09 00 52 00 09 30 3C 34 BD 01 00 00 0B 00 54 00 0B 30 81 00 0A 00 01 00 0D 00 41 00 07 20 59 59 BC 01 01 00 13 00 44 00 0D 20 E3 78 04 04 01 00 0C 00 49 00 06 30 46 34 BE 01 01 00 20 00 4D 00 1A 30 21 34 BC 01 01 00 28 00 4D 00 22 30 CA 31 A8 01 01 00 17 00 4D 00 11 30 23 00 04 00 01 00 11 00 4E 00 0B 20 BB 77 FB 03 01 00 12 00 50 00 0C 30 4D 34 BF 01 01 00 11 00 54 00 0B 30 81 0A 63 00 0B 00 1A 00 4C 00 0D 20 EA 76 F0 03 0B 00 1F 00 4C 00 12 20 F8 76 F1 03 0B 00 1A 00 53 00 0D 20 0B 77 F2 03 0B 00 1D 00

//

53 00 10 20 19 77 F3 03 0B 00 22 00 53 00 15 20 2A 77 F4 03 0B 00 20 00 53 00 13 20 40 77 F5 03 0B 00 1A 00 53 00 0D 20 54 77 F6 03 0B 00 19 00 54 00 0C 20 62 77 F7 03 0B 00 28 00 54 00 1B 20 6F 77 F8 03 0B 00 28 00 54 00 1B 20 8B 77 F9 03 0B 00 20 00 57 00 13 20 A7 77 FA 03 0C 00 35 00

Footer

DE FA FF DE (0xDEFFFADE) 28 91 20 01 total file size (18911528 bytes) 6D 72 6D 5F 70 72 69 32 "mrm_pri2" (8 bytes)