virtual void update_sub_picture(int picnum,int x,int y,int sx,int sy,int bytespixel,unsigned char *buf)=0
| Parameter | Type | Description |
|---|---|---|
| picnum | int | picture index |
| x | int | x offset |
| y | int | y offset |
| sx | int | size in x (no need to be power of 2) |
| sy | int | size in y (no need to be power of 2) |
| bytespixel | int | bytes per pixel (3 or 4) |
| buf | unsigned char * | picture pixels ((sx*bytespixel aligned to 4 bytes)*sy) |
None
This virtual function is used to update just a part of a picture in the texture manager. Only the sub-picture pixels are passed. If x and y are 0 and sx and sy the size of the image, it will work just like the update_picture function.