#include "main.h" // These tests address cases where box characters on two overlapping planes // interact in non-trivial ways. A simple example is a U2580 UPPER HALF BLOCK // (▀) with a white foreground and transparent background, above a U2584 LOWER // HALF BLOCK (▄) with a white foreground and transparent background. One might // expect the result to be an entirely white cell, but by typical Notcurses // rendering rules, we would instead get a white upper half and transparent // lower half: // // - after first cell, glyph is locked U2584, fg is locked white, bg transparent // - second cell can't override glyph nor fg, and background remains transparent // // we will instead special-case block-drawing characters. // see https://github.com/dankamongmen/notcurses/issues/1068 TEST_CASE("Stacking") { auto nc_ = testing_notcurses(); if(!nc_){ return; } if(!notcurses_canutf8(nc_)){ CHECK(0 == notcurses_stop(nc_)); return; } int dimy, dimx; struct ncplane* n_ = notcurses_stddim_yx(nc_, &dimy, &dimx); REQUIRE(nullptr != n_); SUBCASE("LowerAtopUpperWhite") { struct ncplane_options opts = { 0, 0, 1, 1, nullptr, "top", nullptr, 0, }; auto top = ncplane_create(n_, &opts); REQUIRE(nullptr != top); // create an ncvisual of 2 rows, 1 column, with the bottom 0xffffff const uint32_t topv[] = {htole(0), htole(0xffffffff)}; auto ncv = ncvisual_from_rgba(topv, 2, 4, 1); REQUIRE(nullptr != ncv); struct ncvisual_options vopts = { .n = top, .scaling = NCSCALE_NONE, .y = 0, .x = 0, .begy = 0, .begx = 0, .leny = 2, .lenx = 1, .blitter = NCBLIT_2x1, .flags = 0, }; CHECK(top == ncvisual_render(nc_, ncv, &vopts)); ncvisual_destroy(ncv); // create an ncvisual of 2 rows, 1 column, with the top 0xffffff const uint32_t botv[] = {htole(0xffffffff), htole(0)}; ncv = ncvisual_from_rgba(botv, 2, 4, 1); REQUIRE(nullptr != ncv); vopts.n = n_; CHECK(n_ == ncvisual_render(nc_, ncv, &vopts)); ncvisual_destroy(ncv); CHECK(0 == notcurses_render(nc_)); uint64_t channels; auto egc = notcurses_at_yx(nc_, 0, 0, nullptr, &channels); REQUIRE(nullptr != egc); // ought yield space with white background FIXME currently just yields // a lower half block CHECK(0 == strcmp("\u2584", egc)); CHECK(0xffffff == channels_fg_rgb(channels)); CHECK(0xffffff == channels_bg_rgb(channels)); ncplane_destroy(top); } SUBCASE("UpperAtopLowerWhite") { struct ncplane_options opts = { 0, 0, 1, 1, nullptr, "top", nullptr, 0, }; auto top = ncplane_create(n_, &opts); REQUIRE(nullptr != top); // create an ncvisual of 2 rows, 1 column, with the top 0xffffff const uint32_t topv[] = {htole(0xffffffff), htole(0)}; auto ncv = ncvisual_from_rgba(topv, 2, 4, 1); REQUIRE(nullptr != ncv); struct ncvisual_options vopts = { .n = top, .scaling = NCSCALE_NONE, .y = 0, .x = 0, .begy = 0, .begx = 0, .leny = 2, .lenx = 1, .blitter = NCBLIT_2x1, .flags = 0, }; CHECK(top == ncvisual_render(nc_, ncv, &vopts)); ncvisual_destroy(ncv); // create an ncvisual of 2 rows, 1 column, with the bottom 0xffffff const uint32_t botv[] = {htole(0), htole(0xffffffff)}; ncv = ncvisual_from_rgba(botv, 2, 4, 1); REQUIRE(nullptr != ncv); vopts.n = n_; CHECK(n_ == ncvisual_render(nc_, ncv, &vopts)); ncvisual_destroy(ncv); CHECK(0 == notcurses_render(nc_)); uint64_t channels; auto egc = notcurses_at_yx(nc_, 0, 0, nullptr, &channels); REQUIRE(nullptr != egc); // ought yield space with white background FIXME currently just yields // an upper half block CHECK(0 == strcmp("\u2580", egc)); CHECK(0xffffff == channels_fg_rgb(channels)); CHECK(0xffffff == channels_bg_rgb(channels)); ncplane_destroy(top); } SUBCASE("StackedQuadHalves") { struct ncplane_options opts = { 0, 0, 1, 1, nullptr, "top", nullptr, 0, }; auto top = ncplane_create(n_, &opts); REQUIRE(nullptr != top); // create an ncvisual of 2 rows, 2 columns, with the top 0xffffff const uint32_t topv[] = {htole(0xff00ff00), htole(0xff00ff00), htole(0), htole(0)}; auto ncv = ncvisual_from_rgba(topv, 2, 8, 2); REQUIRE(nullptr != ncv); struct ncvisual_options vopts = { .n = top, .scaling = NCSCALE_NONE, .y = 0, .x = 0, .begy = 0, .begx = 0, .leny = 2, .lenx = 2, .blitter = NCBLIT_2x2, .flags = 0, }; CHECK(top == ncvisual_render(nc_, ncv, &vopts)); ncvisual_destroy(ncv); // create an ncvisual of 2 rows, 2 columns, with the bottom 0xffffff const uint32_t botv[] = {htole(0), htole(0), htole(0xff00ff00), htole(0xff00ff00)}; ncv = ncvisual_from_rgba(botv, 2, 8, 2); REQUIRE(nullptr != ncv); vopts.n = n_; CHECK(n_ == ncvisual_render(nc_, ncv, &vopts)); ncvisual_destroy(ncv); CHECK(0 == notcurses_render(nc_)); uint64_t channels; auto egc = notcurses_at_yx(nc_, 0, 0, nullptr, &channels); REQUIRE(nullptr != egc); // ought yield space with white background FIXME currently just yields // an upper half block CHECK(0 == strcmp("\u2580", egc)); CHECK(0x00ff00 == channels_fg_rgb(channels)); CHECK(0x00ff00 == channels_bg_rgb(channels)); ncplane_destroy(top); } SUBCASE("StackedQuadCrossed") { ncplane_erase(n_); notcurses_refresh(nc_, nullptr, nullptr); struct ncplane_options opts = { 0, 0, 1, 1, nullptr, "top", nullptr, 0, }; auto top = ncplane_create(n_, &opts); REQUIRE(nullptr != top); // create an ncvisual of 2 rows, 2 columns, with the tl, br 0xffffff const uint32_t topv[] = {htole(0xffffffff), htole(0), htole(0), htole(0xffffffff)}; auto ncv = ncvisual_from_rgba(topv, 2, 8, 2); REQUIRE(nullptr != ncv); struct ncvisual_options vopts = { .n = top, .scaling = NCSCALE_NONE, .y = 0, .x = 0, .begy = 0, .begx = 0, .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); ncvisual_destroy(ncv); // create an ncvisual of 2 rows, 2 columns, with the tr, bl 0xffffff const uint32_t botv[] = {htole(0), htole(0xffffffff), htole(0xffffffff), htole(0)}; ncv = ncvisual_from_rgba(botv, 2, 8, 2); REQUIRE(nullptr != ncv); vopts.n = n_; CHECK(n_ == ncvisual_render(nc_, ncv, &vopts)); ncvisual_destroy(ncv); CHECK(0 == notcurses_render(nc_)); uint64_t channels; auto egc = notcurses_at_yx(nc_, 0, 0, nullptr, &channels); REQUIRE(nullptr != egc); // ought yield space with white background FIXME currently just yields // an upper half block CHECK(0 == strcmp("\u259a", egc)); // quadrant upper left and lower right CHECK(0xffffff == channels_fg_rgb(channels)); CHECK(0xffffff == channels_bg_rgb(channels)); ncplane_destroy(top); } // common teardown CHECK(0 == notcurses_stop(nc_)); }