NCGR (NITRO-System Character Graphics for Runtime) 2D engine character or bitmap graphics. When they store character graphics they will usually have the NCGR extension, and for bitmap graphics will have the NCBR extension. It follows the NNS G2D Binary File Format. NCGR files use file signature 'NCGR'.
CHAR Block#
The CHAR block stores the graphics data for the file. The structure of this block is as follows:
| Offset | Type | Meaning |
|---|---|---|
| 0x00 | u16 | Width of graphics in characters. If the file is storing graphics with 1D mapping mode, this field is not used and usually set to 0xFFFF. |
| 0x02 | u16 | Height of graphics in characters. Unused in 1D mapping mode. |
| 0x04 | u32 | Color format. This is the same as the texture formats used in TEXIMAGE_PARAM, where only values of 3 and 4 (palette16 and palette256) are used. |
| 0x08 | u32 | Mapping mode. This can be 2D (0x000000), 1D 32K (0x000010), 1D 64K (0x100010), 1D 128K (0x200010), or 1D 128K (0x300010). |
| 0x0C | u32 | Graphics type. For character graphics, this will be 0. For bitmap graphics, this will be 1. |
| 0x10 | u32 | Size of graphics data. |
| 0x14 | void * | Pointer to graphics data. This is relative to the start of this structure and fixed up at load time. |
CPOS Block#
The CPOS (character position) block stores information about how to load the file into VRAM for a background layer. This block allows for loading only part of the graphics data into VRAM. This block is structures as follows:
| Offset | Type | Meaning |
|---|---|---|
| 0x00 | u16 | X (should be 0). |
| 0x02 | u16 | Y |
| 0x04 | u16 | Width |
| 0x06 | u16 | Height |
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This page (revision-2) was last changed on 01-May-2024 19:00 by Garhoogin
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