paint(): need invert bits not logic for stacked blitters #1068

src/lib/render.c

@@ -312,7 +312,8 @@ paint(const ncplane* p, struct crender* rvec, int dstleny, int dstlenx,
       // Evaluate the background first, in case we have HIGHCONTRAST fg text.
       if(cell_bg_alpha(targc) > CELL_ALPHA_OPAQUE){
         const nccell* vis = &p->fb[nfbcellidx(p, y, x)];
-        if(!((!crender->s.blittedquads) & cell_blittedquadrants(vis))){
+//fprintf(stderr, "y/x: %d/%d crenderbq: 0x%x visbq: 0x%x\n", y, x, crender->s.blittedquads, cell_blittedquadrants(vis));
+        if(!((~crender->s.blittedquads) & cell_blittedquadrants(vis))){
           if(cell_bg_default_p(vis)){
             vis = &p->basecell;
           }

tests/stacking.cpp

@@ -154,11 +154,9 @@ TEST_CASE("Stacking") {
       .leny = 2, .lenx = 2, .blitter = NCBLIT_2x2, .flags = 0,
     };
     CHECK(top == ncvisual_render(nc_, ncv, &vopts));
-    /*
-cell c = CELL_TRIVIAL_INITIALIZER;
-ncplane_at_yx_cell(top, 0, 0, &c);
-fprintf(stderr, "[[[%s]]] %016lx\n", cell_extended_gcluster(top, &c), c.channels);
-*/
+//cell c = CELL_TRIVIAL_INITIALIZER;
+//ncplane_at_yx_cell(top, 0, 0, &c);
+//fprintf(stderr, "[[[%s]]] %016lx\n", cell_extended_gcluster(top, &c), c.channels);
     ncvisual_destroy(ncv);
 
     // create an ncvisual of 2 rows, 2 columns, with the tr, bl 0xffffff