use 64 bit operations to update boolean bitmaps

diff --git a/lib/pdf/BitmapOutputDev.cc b/lib/pdf/BitmapOutputDev.cc
index e1cb3d3..49f5e3c 100644 (file)
--- a/lib/pdf/BitmapOutputDev.cc
+++ b/lib/pdf/BitmapOutputDev.cc
@@ -468,13 +468,35 @@ static void update_bitmap(SplashBitmap*bitmap, SplashBitmap*update, int x1, int
            u += width8;
        }
     } else {
-       int x,y;
-       for(y=0;y<yspan;y++) {
-           for(x=0;x<xspan;x++) {
-               b[x] |= u[x];
+       if(((ptroff_t)b&7)==((ptroff_t)u&7)) {
+           int x,y;
+           for(y=0;y<yspan;y++) {
+               Guchar*e1 = b+xspan-8;
+               Guchar*e2 = b+xspan;
+               while(((ptroff_t)b&7) && b<e1) {
+                   *b |= *u;
+                   b++;u++;
+               }
+               while(b<e1) {
+                   *(long long*)b |= *(long long*)u;
+                   b+=8;u+=8;
+               }
+               while(b<e2) {
+                   *b |= *u;
+                   b++;u++;
+               }
+               b += width8-xspan;
+               u += width8-xspan;
+           }
+       } else {
+           int x,y;
+           for(y=0;y<yspan;y++) {
+               for(x=0;x<xspan;x++) {
+                   b[x] |= u[x];
+               }
+               b += width8;
+               u += width8;
            }
-           b += width8;
-           u += width8;
        }
     }
 }