rotate-sol.c

SSD6 练习5的原版正确答案

#include <stdio.h>
#include <stdlib.h>
#include "defs.h"
#include "cache.h"


/* Here is an our naive implementation */
char rotate_descr[] = "Naive Row-wise Traversal of src";
void rotate(int dim, pixel *src, pixel *dst) {
	int i, j;

	for(i=0; i < dim; i++) {
		for(j=0; j < dim; j++) {
			COPY(&dst[PIXEL(dim-1-j,i,dim)], &src[PIXEL(i,j,dim)]);
		}
	}

	return;
}


char rotate_sol_descr[] = "ROTATE: reference solution";
void rotate_sol(int dim, pixel* src, pixel* dst) {
	int i, j, ii=0, jj=0, hbsize=dim, vbsize=dim;
	hbsize = vbsize = 4;
	for(ii=0; ii<dim; ii += hbsize) {
		for(jj=0; jj<dim; jj += vbsize) {
			for(i=ii; i<ii+hbsize; i++) {
				for(j=jj; j<jj+vbsize; j++) {
					COPY(&dst[PIXEL((dim-1-j),i,dim)],&src[PIXEL(i,j,dim)]);
				}
			}
		}
	}

}



/* Add additional functions to test here */
void register_rotate_functions() {
	add_rotate_function(&rotate, rotate_descr);
	add_rotate_function(&rotate_sol, rotate_sol_descr);
	
}