Provided by: allegro5-doc_5.2.3.0-1_all 

NAME
al_get_d3d_system_texture - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro_direct3d.h>
LPDIRECT3DTEXTURE9 al_get_d3d_system_texture(ALLEGRO_BITMAP *bitmap)
DESCRIPTION
Returns the system texture (stored with the D3DPOOL_SYSTEMMEM flags). This texture is used for the ren‐
der-to-texture feature set.
Returns: A pointer to the Direct3D system texture.
Allegro reference manual al_get_d3d_system_texture(3alleg5)