-
Notifications
You must be signed in to change notification settings - Fork 24
PVR Texture
A PVR texture is the native texture format of the Dreamcast.
This header is optional and may not be present in the texture.
| Offset | Length (bytes) | Description |
|---|---|---|
| 0x0 | 4 | "GBIX" magic code |
| 0x4 | 4 | 8 |
| 0x8 | 4 | Global index |
| 0xC | 4 | Filled with 0 or Filled with 0x20 |
| Offset | Length (bytes) | Description |
|---|---|---|
| 0x0 | 4 | "PVRT" magic code |
| 0x4 | 4 | Length of the PVRT chunk minus 24 |
| 0x8 | 1 | Pixel format |
| 0x9 | 1 | Data format |
| 0xA | 2 | 0 |
| 0xC | 2 | Texture width |
| 0xE | 2 | Texture height |
For textures that contain an internal palette (which is only the case for VQ based textures), the palette will be located after the PVRT header.
| Offset | Length (bytes) | Description |
|---|---|---|
| 0x0 | Varies | Palette data |
The texture data is the last thing stored in a PVR texture. For textures that contains mipmaps, the textures will be stored from smallest to largest. That is, the 1x1 mipmap will be stored first, and the base texture will be stored last.
| Offset | Length (bytes) | Description |
|---|---|---|
| 0x0 | Varies | Texture data |
These are the pixel formats that are currently supported by Puyo Tools.
| Value | Name |
|---|---|
| 0x0 | ARGB1555 |
| 0x1 | RGB565 |
| 0x2 | ARGB4444 |
This pixel format supports 1-bit alpha, followed by 5-bits each for the red, green, and blue components. This pixel format is best for textures that contain alpha that is either opaque or fully transparent.
This pixel format supports 5-bits for both the red and blue components, and 6-bits for the green component. This pixel format is best for textures that do not contain transparency.
This pixel format supports 4-bit alpha for the alpha, red, green, and blue components. This pixel format is best for textures that contain partial transparency.
These are the data formats that are currently supported by Puyo Tools.
| Value | Name |
|---|---|
| 0x01 | Square twiddled |
| 0x02 | Square twiddled with mipmaps |
| 0x03 | VQ |
| 0x04 | VQ with mipmaps |
| 0x05 | 4-bit indexed with external palette |
| 0x07 | 8-bit indexed with external palette |
| 0x09 | Rectangle |
| 0x0D | Rectangle twiddled |
| 0x10 | Small VQ |
| 0x11 | Small VQ with mipmaps |
| 0x12 | Square twiddled with mipmaps (alternate) |
This format requires a square texture (that is, the width and height are the same), and the contents are twiddled.
This format requires a square texture (that is, the width and height are the same), and the contents are twiddled. This format contains mipmaps. There are 2 bytes filled with 0 before the 1x1 mipmap.