channels_blend() : don't blend in wide status #260

include/notcurses.h

@@ -1114,13 +1114,15 @@ channels_set_bg_default(uint64_t* channels){
 // it will not be used (unless 'blends' is 0).
 static inline unsigned
 channels_blend(unsigned c1, unsigned c2, unsigned blends){
+  unsigned rsum, gsum, bsum;
   if(blends == 0){
-    return c2;
-  }
-  if(!channel_default_p(c2) && !channel_default_p(c1)){
-    int rsum = (channel_r(c1) * blends + channel_r(c2)) / (blends + 1);
-    int gsum = (channel_g(c1) * blends + channel_g(c2)) / (blends + 1);
-    int bsum = (channel_b(c1) * blends + channel_b(c2)) / (blends + 1);
+    // don't just return c2, or you set wide status and all kinds of crap
+    channel_rgb(c2, &rsum, &gsum, &bsum);
+    channel_set_rgb(&c1, rsum, gsum, bsum);
+  }else if(!channel_default_p(c2) && !channel_default_p(c1)){
+    rsum = (channel_r(c1) * blends + channel_r(c2)) / (blends + 1);
+    gsum = (channel_g(c1) * blends + channel_g(c2)) / (blends + 1);
+    bsum = (channel_b(c1) * blends + channel_b(c2)) / (blends + 1);
     channel_set_rgb(&c1, rsum, gsum, bsum);
   }
   return c1;

src/lib/render.c

@@ -516,6 +516,8 @@ notcurses_render_internal(notcurses* nc){
       }
       if(depth > 0){ // we are above the previous source plane
         if(inright){ // wipe out the character to the left
+          // FIXME do this by keeping an offset for the memstream, and
+          // truncating it (via lseek()), methinks
           cell* prev = &nc->lastframe[fbcellidx(nc->stdscr, y, x - 1)];
           pool_release(&nc->pool, prev);
           cell_init(prev);