new VisualCellGeometryNoScaling unit test

src/tests/visual.cpp

@@ -113,6 +113,28 @@ TEST_CASE("Visual") {
     CHECK(NCBLIT_DEFAULT != g.blitter); // we must not revolve to default
   }
 
+  // build a simple ncvisual and check the calculated geometries for various
+  // cell blitters in the absence of scaling
+  SUBCASE("VisualCellGeometryNoScaling") {
+    std::vector v(80, 0xfffffffflu);
+    auto ncv = ncvisual_from_rgba(v.data(), 8, 10 * sizeof(decltype(v)::value_type), 10);
+    REQUIRE(nullptr != ncv);
+    struct ncvisual_options vopts{};
+    ncvgeom g{};
+    vopts.blitter = NCBLIT_1x1;
+    CHECK(0 == ncvisual_geom(nullptr, ncv, &vopts, &g));
+    ncvisual_destroy(ncv);
+    CHECK(8 == g.pixy);
+    CHECK(10 == g.pixx);
+    CHECK(1 == g.scaley);
+    CHECK(1 == g.scalex);
+    CHECK(8 == g.rpixy);
+    CHECK(10 == g.rpixx);
+    CHECK(8 == g.rcelly);
+    CHECK(10 == g.rcellx);
+    CHECK(NCBLIT_DEFAULT == g.blitter);
+  }
+
   // check that we properly populate RGB + A -> RGBA from 35x4 (see #1806)
   SUBCASE("VisualFromRGBPacked35x4") {
     unsigned char rgb[4 * 35 * 3] = "";