quadblitter/dualblitter unit test bases

tests/visual.cpp

@@ -9,6 +9,8 @@ TEST_CASE("Visual") {
   }
   ncplane* ncp_ = notcurses_stdplane(nc_);
   REQUIRE(ncp_);
+  auto n_ = notcurses_stdplane(nc_);
+  REQUIRE(n_);
 
 #ifndef USE_MULTIMEDIA
   SUBCASE("VisualDisabled"){
@@ -163,5 +165,55 @@ TEST_CASE("Visual") {
     CHECK(0 == notcurses_render(nc_));
   }
 
+  // write a checkerboard pattern and verify the NCBLIT_2x1 output
+  SUBCASE("Dualblitter") {
+    constexpr int DIMY = 10;
+    constexpr int DIMX = 11; // odd number to get checkerboard effect
+    auto rgba = new uint32_t[DIMY * DIMX];
+    for(int i = 0 ; i < DIMY * DIMX ; ++i){
+      CHECK(0 == ncpixel_set_a(&rgba[i], 0xff));
+      if(i % 2){
+        CHECK(0 == ncpixel_set_g(&rgba[i], 0xff));
+      }else{
+        CHECK(0 == ncpixel_set_r(&rgba[i], 0xff));
+      }
+    }
+    auto ncv = ncvisual_from_rgba(rgba, DIMY, DIMX * sizeof(uint32_t), DIMX);
+    REQUIRE(nullptr != ncv);
+    struct ncvisual_options vopts{};
+    vopts.n = n_;
+    vopts.blitter = NCBLIT_2x1;
+    vopts.flags = NCVISUAL_OPTION_NODEGRADE;
+    CHECK(n_ == ncvisual_render(nc_, ncv, &vopts));
+    CHECK(0 == notcurses_render(nc_));
+    // FIXME check output
+    delete[] rgba;
+  }
+
+  // write a checkerboard pattern and verify the NCBLIT_2x2 output
+  SUBCASE("Quadblitter") {
+    constexpr int DIMY = 10;
+    constexpr int DIMX = 11; // odd number to get checkerboard effect
+    auto rgba = new uint32_t[DIMY * DIMX];
+    for(int i = 0 ; i < DIMY * DIMX ; ++i){
+      CHECK(0 == ncpixel_set_a(&rgba[i], 0xff));
+      if(i % 2){
+        CHECK(0 == ncpixel_set_g(&rgba[i], 0xff));
+      }else{
+        CHECK(0 == ncpixel_set_r(&rgba[i], 0xff));
+      }
+    }
+    auto ncv = ncvisual_from_rgba(rgba, DIMY, DIMX * sizeof(uint32_t), DIMX);
+    REQUIRE(nullptr != ncv);
+    struct ncvisual_options vopts{};
+    vopts.n = n_;
+    vopts.blitter = NCBLIT_2x2;
+    vopts.flags = NCVISUAL_OPTION_NODEGRADE;
+    CHECK(n_ == ncvisual_render(nc_, ncv, &vopts));
+    CHECK(0 == notcurses_render(nc_));
+    // FIXME check output
+    delete[] rgba;
+  }
+
   CHECK(!notcurses_stop(nc_));
 }