1 #include<graphics.h>
2 #include<conio.h>
3
4 void Mosaic(IMAGE *img, int size, int sx, int sy)
5 {
6 int width = img->getheight();//获取图形的宽
7 int height = img->getwidth();
8 int redsum;//红色的值的和
9 int bluesum;//蓝色值的和
10 int greensum;//绿色值和
11 int counnt;//每个小方块内的像素数量
12 int color;//每个像素的颜色
13 int x, y, tx, ty;
14 DWORD* p = GetImageBuffer(img);//获取指向显存的指针
15
16 //求左上角第一个樊哙的坐标
17 sx = (sx%size==0?0:sx%size-size);
18 sy = (sy%size == 0 ? 0 : sy%size - size);
19 //循环小方块
20 for (y = sy; y < height;y+=size)
21 {
22 for (x = sx; x < width;x+=size)
23 {
24 redsum = greensum = bluesum = counnt = 0;
25 //遍历像素点
26 for (ty = min(y + size, height) - 1; ty >= max(y, 0); ty--)
27 {
28 for (tx = min(x + size, width)-1; tx >= max(x, 0); tx--)
29 {
30 color = p[ty*width + tx];
31 redsum += GetRValue(color);
32 greensum+=GetGValue(color);
33 bluesum += GetBValue(color);
34 counnt++;
35 }
36 }
37
38
39 redsum /= counnt;
40 greensum /= counnt;
41 bluesum /= counnt;
42 color = RGB(redsum, greensum, bluesum);
43 for (ty = min(y + size, height) - 1; ty >= max(y, 0); ty--)
44 {
45 for (tx = min(x + size, width) - 1; tx >= max(x, 0); tx--)
46 {
47 p[ty*width + tx] = color;
48 }
49 }
50
51 }
52 }
53
54 }
55
56 int main()
57 {
58 //搭建绘图环境
59 initgraph(640, 480);
60 //setbkcolor(RED);
61 //cleardevice();
62 IMAGE img;
63 loadimage(&img,L"11.jpg", 640, 480);
64 putimage(0, 0, &img);
65 _getch();
66 Mosaic(&img, 5, 0, 0);
67 putimage(0,0,&img);
68 //loadimage(NULL,L"11.jpg");
69 _getch();
70 return 0;
71 }
