These routines are meant to provide a high level mechanism to create and manipulate pixel canvases. ... Multithreading Level : Unsafe. flag kwin _compute_pc_subimage ( KPixCanvas canvas , int x_off, int y_off, int x_pixels, int y_pixels, int cache_width, int cache_height, CONST char *slice, CONST uaddr *hoffsets, CONST uaddr *voffsets, unsigned int image_width, unsigned int image_height, unsigned int type, unsigned int conv_type, unsigned int num_pixels, ...