I found this in the manual under bmap_lock

After locking an uncompressed bitmap, you can access its texture content directly through the bmap.finalbits pointer. The texture size (in bytes) is given through (mybmap.finalwidth * mybmap.finalheight * bmap.finalbytespp). The texture size is normally a power of 2 and not identical to the original image size returned by bmap_width and bmap_height.


I just had to know why and what goes wrong