zz.c

source 为程序源代码文件目录 exe 为可执行文件目录 pics 为所有处理好的图片的目录 需要预先安装MinGW MinGW为Mini Gnu for Windows 里面包含gcc

#include <stdio.h>
#include <stdlib.h>
#include <memory.h>
#include "hdr.h"

struct bmphdr *hdr;
unsigned char *bitmap, *to;
char buf[2048];
int di[8] = {0,  0, 1, 1,  1, -1, -1, -1};
int dj[8] = {1, -1, 0, 1, -1,  0,  1, -1};
unsigned char tmp[9];

inline int cmp(const void *a, const void *b)
{
	unsigned char *t1, *t2;
	t1 = (unsigned char *)a;
	t2 = (unsigned char *)b;
	if (*t1 < *t2)
		return -1;
	else if (*t1 > *t2)
		return 1;
	else
		return 0;
}

int main(int argc, char *argv[])
{
	int i, j, k, nr_pixels;
 	FILE *fp, *fpnew;
	unsigned pj, px;
	int ii, jj;
	
	if (argc != 3) {
		printf("Usage: %s <file_from> <file_to>\n", argv[0]);
		exit(1);
	}
	
	hdr = get_header(argv[1]);

	if (!hdr) exit(1);

	fp = fopen(argv[1], "rb");
	
	if (!fp) {
		printf("File open error!\n");
		exit(1);
	}

	fseek(fp, hdr->offset, SEEK_SET);
	nr_pixels = hdr->width * hdr->height;
	bitmap = malloc(nr_pixels);
	fread(bitmap, nr_pixels, 1, fp);
	fclose(fp);

	to = malloc(nr_pixels);
	for (i = 0; i < hdr->height; i++)
		for (j = 0; j < hdr->width; j++) {
			if (i == 0 || i == hdr->height - 1 || j == 0 || j == hdr->width - 1) {
				to[i * hdr->width + j] = bitmap[i * hdr->width + j];	
			} else {
				for (k = 0; k < 8; k++) {
					ii = i + di[k];
					jj = j + dj[k];
					tmp[k] = bitmap[ii * hdr->width + jj];
				}
				tmp[8] = bitmap[i * hdr->width + j];
				qsort(tmp, 9, 1, cmp);
				to[i * hdr->width + j] = tmp[4];
			}
		}
	
	fpnew = fopen(argv[2], "wb+");
	
	if (!fpnew) {
		printf("File create error!\n");
		exit(1);
	}

	fwrite(hdr->signature, 2, 1, fpnew);
	fwrite(&hdr->size, 4, 1, fpnew);
	fwrite(hdr->reserved, 4, 1, fpnew);
	fwrite(&hdr->offset, 4, 1, fpnew);
	fwrite(&hdr->hdr_size, 4, 1, fpnew);
	fwrite(&hdr->width, 4, 1, fpnew);
	fwrite(&hdr->height, 4, 1, fpnew);
	fwrite(&hdr->nr_planes, 2, 1, fpnew);
	fwrite(&hdr->bits_per_pixel, 2, 1, fpnew);
	fwrite(&hdr->compress_type, 4, 1, fpnew);
	fwrite(&hdr->data_size, 4, 1, fpnew);
	fwrite(&hdr->resol_hori, 4, 1, fpnew);
	fwrite(&hdr->resol_vert, 4, 1, fpnew);
	fwrite(&hdr->nr_colors, 4, 1, fpnew);
	fwrite(&hdr->important_color, 4, 1, fpnew);
	if (hdr->offset > 54)
		fwrite(hdr->info, hdr->offset - 54, 1, fpnew);
	fwrite(to, nr_pixels, 1, fpnew);
	
	fclose(fpnew);
	free(hdr);
	free(bitmap);

	return 0;
}