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al_destroy_shader - Allegro 5 API
#include <allegro5/allegro.h> void al_destroy_shader(ALLEGRO_SHADER *shader)
Destroy a shader. Any bitmaps which currently use the shader will implicitly stop using the shader. In multi-threaded programs, be careful that no such bitmaps are being accessed by other threads at the time. As a convenience, if the target bitmap of the calling thread is using the shader then the shader is implicitly unused before being destroyed. This function does nothing if the shader argument is NULL.