X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~yarrgweb/git?p=ypp-sc-tools.db-test.git;a=blobdiff_plain;f=pctb%2Fstructure.h;h=f3fbb72ed2d157ea01a3b103e2d2854544bb2f85;hp=0ad92a618e62386844f2ac50ebf652ac981ce754;hb=9334b48a221df6f96a88933be8fde35e2ef41b35;hpb=4c375a59891a4161e30bd67709a1ad5d1950a850

diff --git a/pctb/structure.h b/pctb/structure.h
index 0ad92a6..f3fbb72 100644
--- a/pctb/structure.h
+++ b/pctb/structure.h
@@ -53,23 +53,32 @@ CanonImage *alloc_canon_image(int w, int h);
      * each pixel in reading order.				\
      */								\
     (im)= alloc_canon_image((w), (h));				\
+    (im)->rgb= alloc_rgb_image((w), (h));			\
 								\
     int x,y;							\
+    unsigned long last_rgb= ~0UL;				\
+    int last_c= -1;						\
     for (y=0; y<(h); y++) {					\
       for (x=0; x<(w); x++) {					\
         const CanonColourInfo *cci;				\
         unsigned long rgb;					\
 	COMPUTE_RGB;						\
-	for (cci=canoncolourinfos; cci->c; cci++) {		\
-	  if (cci->rgb == rgb) {				\
-	    (im)->d[y*(w) + x]= cci->c;				\
-	    break;						\
+        CANONIMG_ALSO_STORERGB((im)->rgb);			\
+	if (rgb == last_rgb) {					\
+	  (im)->d[y*(w) + x]= last_c;				\
+	} else {						\
+	  for (cci=canoncolourinfos; cci->c; cci++) {		\
+	    if (cci->rgb == rgb) {				\
+	      last_rgb= rgb;					\
+	      (im)->d[y*(w) + x]= last_c= cci->c;		\
+	      break;						\
+	    }							\
 	  }							\
 	}							\
       }								\
       if (DEBUGP(rect)) {					\
 	fprintf(debug, "%4d ",y);				\
-	fwrite(im->d + y*w, 1,w, debug);			\
+	fwrite(im->d + y*(w), 1,(w), debug);			\
 	fputc('\n',debug);					\
       }								\
     }								\