al_get_opengl_texture
GLuint al_get_opengl_texture(ALLEGRO_BITMAP *bitmap)
Returns the OpenGL texture id internally used by the given bitmap if it uses one, else 0.
Example:
bitmap = al_load_bitmap("my_texture.png");
texture = al_get_opengl_texture(bitmap);
if (texture != 0)
glBindTexture(GL_TEXTURE_2D, texture);Examples: ex_gldepth, ex_opengl_pixel_shader
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