kill off-by-one in pixel scaling #1558

src/lib/visual.c

@@ -665,10 +665,10 @@ ncplane* ncvisual_render_pixels(notcurses* nc, ncvisual* ncv, const struct blits
       disprows *= nc->tcache.cellpixy;
       clamp_to_sixelmax(&nc->tcache, &disprows, &dispcols);
       if(!(flags & NCVISUAL_OPTION_HORALIGNED)){
-        dispcols -= (placex * nc->tcache.cellpixx + 1);
+        dispcols -= placex * nc->tcache.cellpixx;
       }
       if(!(flags & NCVISUAL_OPTION_VERALIGNED)){
-        disprows -= (placey * nc->tcache.cellpixy + 1);
+        disprows -= placey * nc->tcache.cellpixy;
       }
     }
   }

src/tests/bitmap.cpp

@@ -70,7 +70,7 @@ TEST_CASE("Bitmaps") {
       .userptr = nullptr, .name = "bigp", .resizecb = nullptr,
       .flags = 0, .margin_b = 0, .margin_r = 0,
     };
-    vopts.scaling = NCSCALE_STRETCH;
+    vopts.scaling = NCSCALE_SCALE;
     vopts.n = ncplane_create(n_, &nopts);
     REQUIRE(vopts.n);
     uint64_t white = CHANNELS_RGB_INITIALIZER(0xff, 0xff, 0xff, 0xff, 0xff, 0xff);