Loading textures and Allocating memory

[Newbie]

I have a doubt on two functions :

Allocation in the PVR :

Code: Select all

  pvr_ptr_t pvr_mem_malloc(size_t size);

Loading a texture in the PVR :

Code: Select all

  void pvr_txr_load(void * src, pvr_ptr_t dst, uint32 count);

The pvr_mem_malloc seems to use in size parameter the size of a texture in bytes.

The pvr_txr_load seems to use in count parameter the size of a texture in Uint16s.

Assuming we have a 8*8 pixel squared texture :

we must use pvr_mem_malloc with size = 8*8*2 bytes and pvr_txr_load with count = 8*8

Is that correct ?

Thanks for help.

[BlueCrab]

The count of pvr_txr_load() is in bytes. See the documentation here.

pvr_txr_load() pretty much simply calls on sq_cpy(), which also is just a byte copy with the store queues (although, the number of bytes passed into it must be divisible by 32). So, the same applies to pvr_txr_load(), the count must be divisible by 32. If you want to copy a smaller amount than that for some reason (there shouldn't be much reason to, since the smallest texture size supported by the PVR is 8x8 anyway), you can just use a regular memcpy, as the pointer returned from pvr_mem_malloc() is completely valid to access in that manner.