Add crc32.

[netwatch.git] / video / generic.c

diff --git a/video/generic.c b/video/generic.c
index 6168df20af5b459636f41a43c68443e2c78f052a..d8b320bfe9af4231061e755c29efe60efa066ba1 100644 (file)
--- a/video/generic.c
+++ b/video/generic.c
@@ -1,5 +1,6 @@
 #include <stdint.h>
 #include <fb.h>
+#include <crc32.h>
 
 uint32_t checksum_rect_generic32(int x, int y, int width, int height) {
 
@@ -8,17 +9,15 @@ uint32_t checksum_rect_generic32(int x, int y, int width, int height) {
         */
 
         int scanline = fb->curmode.xres * 4;
-        uint32_t * lineaddr;
-        int i, j;
+        unsigned char * lineaddr;
+        int i;
 
         uint32_t sum = 0;
 
         for (i = 0; i < height; i++) {
-                lineaddr = (uint32_t *)(fb->fbaddr + (i + y) * scanline);
+                lineaddr = fb->fbaddr + (i + y) * scanline;
 
-                for (j = 0; j < width; j++) {
-                        sum += lineaddr[j + x];
-                }
+                sum ^= crc32(lineaddr, width * 4);
         }
 
         return sum;
@@ -32,7 +31,7 @@ void copy_pixels_generic32(char *buf, int x, int y, int width, int height)
        for (cy = y; cy < (y + height); cy++)
        {
                fbuf = (unsigned int *)fb->fbaddr;
-               fbuf += y * (fb->curmode.xres) + x;
+               fbuf += cy * (fb->curmode.xres) + x;
                for (cx = x; cx < (x + width); cx++)
                        *(ibuf++) = *(fbuf++);
        }