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RicBent: CTPK file format
2017-11-24T23:10:30Z
<p>CTPK file format</p>
<p><b>New page</b></p><div>[[Category:File formats]]<br />
'''CTPK - CTR Texture PacKage'''<br />
<br />
CTPK is a container file for one or multiple textures that are in various formats readable by the 3ds system.<br />
Offsets are relative to the beginning of the header section unless specified.<br />
<br />
== CTPK Header ==<br />
{| class="wikitable"<br />
|-<br />
! Offset<br />
! Length<br />
! Description<br />
|-<br />
| 0x0<br />
| 0x4<br />
| Magic "CTPK"<br />
|-<br />
| 0x4<br />
| 0x2<br />
| Version?<br />
|-<br />
| 0x6<br />
| 0x2<br />
| Number of Texture Entries<br />
|-<br />
| 0x8<br />
| 0x4<br />
| Texture Data section offset<br />
|-<br />
| 0xC<br />
| 0x4<br />
| Texture Data section size<br />
|-<br />
| 0x10<br />
| 0x4<br />
| Hash section offset<br />
|-<br />
| 0x14<br />
| 0x4<br />
| Conversion Info section offset<br />
|-<br />
| 0x18<br />
| 0x8<br />
| Padding<br />
|}<br />
<br />
== Texture Info Entry ==<br />
The Header block is followed by a texture info entry for each texture in the container.<br />
This block is usually followed by the bitmap size arrays and then the file paths.<br />
0x20 byte aligned.<br />
{| class="wikitable"<br />
|-<br />
! Offset<br />
! Length<br />
! Description<br />
|-<br />
| 0x0<br />
| 0x4<br />
| File path Offset<br />
|-<br />
| 0x4<br />
| 0x4<br />
| Texture Data Size<br />
|-<br />
| 0x8<br />
| 0x4<br />
| Texture Data Offset (Relative to texture data block offset)<br />
|-<br />
| 0xC<br />
| 0x4<br />
| Texture Format<br />
|-<br />
| 0x10<br />
| 0x2<br />
| Width<br />
|-<br />
| 0x12<br />
| 0x2<br />
| Height<br />
|-<br />
| 0x14<br />
| 0x1<br />
| Mip Level<br />
|-<br />
| 0x15<br />
| 0x1<br />
| Type (0: Cube Map, 1: 1D, 2: 2D)<br />
|-<br />
| 0x16<br />
| 0x2<br />
| Cube Map Related<br />
|-<br />
| 0x18<br />
| 0x4<br />
| Bitmap Size Array Offset (Relative to to this block)<br />
|-<br />
| 0x1C<br />
| 0x4<br />
| Unix Timestamp<br />
|}<br />
<br />
== Hash Block Entry ==<br />
The texture info block is followed by a hash entry for each texture entry.<br />
0x8 byte aligned.<br />
{| class="wikitable"<br />
|-<br />
! Offset<br />
! Length<br />
! Description<br />
|-<br />
| 0x0<br />
| 0x4<br />
| Crc32 of the file path<br />
|-<br />
| 0x4<br />
| 0x4<br />
| Index<br />
|}<br />
<br />
== Conversion Info Block Entry ==<br />
The hash block is followed by a conversion info entry for each texture entry.<br />
0x4 byte aligned.<br />
{| class="wikitable"<br />
|-<br />
! Offset<br />
! Length<br />
! Description<br />
|-<br />
| 0x0<br />
| 0x1<br />
| Texture Format<br />
|-<br />
| 0x1<br />
| 0x1<br />
| Unknown<br />
|-<br />
| 0x2<br />
| 0x1<br />
| Compressed<br />
|-<br />
| 0x3<br />
| 0x1<br />
| ETC1 Related (Quality?)<br />
|}<br />
<br />
== Texture Data Block ==<br />
This block and all it's texture entries are 0x80 byte aligned.<br />
<br />
== Texture Formats ==<br />
{| class="wikitable"<br />
|-<br />
! Value<br />
! Description<br />
|-<br />
| 0x0<br />
| RGBA8888<br />
|-<br />
| 0x1<br />
| RGB888<br />
|-<br />
| 0x2<br />
| RGBA5551<br />
|-<br />
| 0x3<br />
| RGB565<br />
|-<br />
| 0x4<br />
| RGBA4444<br />
|-<br />
| 0xC<br />
| ETC1<br />
|-<br />
| 0xD<br />
| ETC1 + Alpha<br />
|}</div>
RicBent