Initial commit

user_proc.c

@@ -0,0 +1,27 @@
+#include <stdint.h>
+#include "user_proc.h"
+//绘制十字交叉线
+void draw_cross(GrayImage *img, int x, int y, int size, uint8_t color){
+    if(!img || !img->data) return;
+    //获取图像宽度和高度
+    int w = img->width;
+    int h = img->height;
+    if(x<0 || x>=w || y<0 || y>=h) return;
+    //定义一个二维数组指针方便访问像素 
+    uint8_t **image = img->rows;
+    for(int dx=-size;dx<=size;dx++){
+        int nx = x + dx;
+        if(nx>=0 && nx<w){
+            image[y][nx] = color;
+        }
+    }
+    for(int dy=-size;dy<=size;dy++){
+        int ny = y + dy;
+        if(ny>=0 && ny<h){
+            image[ny][x] = color;
+        }
+    }
+}
+void img_proc(GrayImage *img){
+    draw_cross(img, img->width/2, img->height/2, 20, 0);
+}