OS_SpriteOp 39 (changes)
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OS SWI Calls
» OS_SpriteOp
» OS_SpriteOp 39 – Create/read/remove sprite MetaData
OS_SpriteOp 39 – Create/read/remove sprite MetaData
(SWI &2E)
| Entry | |
|---|---|
| R0 | 39 (Reason code) + Area value |
| R1 | Sprite area (as defined by area value in R0) |
| R2 | Sprite name/pointer (as defined by area value in R0) |
| R3 | -1 → Read MetaData |
| else Length of MetaData | |
| R4 | -1 → Remove MetaData |
| 0 → zero-initialise | |
| else uPtr to MetaData to write | |
| R5 | FourCC identifier |
| or 1-based index |
| Exit | |
|---|---|
| If R3 = -1 on entry: | |
| R3 | Size of MetaData (bytes), 0 if none |
| R4 | aPtr to MetaData, or 0 if none |
| R5 | FourCC identifier |
| All other registers preserved | |
Use
This call allows MetaData to be added or removed from a sprite, or for the size and location of MetaData to be read.
Notes
This SpriteOp is provided by Cerilica’s MetaSprite module.MetaSprite module.
See also
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