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54 lines
1.8 KiB
C++
54 lines
1.8 KiB
C++
#include "main.h"
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// These tests address cases where box characters on two overlapping planes
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// interact in non-trivial ways. A simple example is a U2580 UPPER HALF BLOCK
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// (▀) with a white foreground and transparent background, above a U2584 LOWER
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// HALF BLOCK (▄) with a white foreground and transparent background. One might
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// expect the result to be an entirely white cell, but by typical Notcurses
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// rendering rules, we would instead get a white upper half and transparent
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// lower half:
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//
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// - after first cell, glyph is locked U2584, fg is locked white, bg transparent
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// - second cell can't override glyph nor fg, and background remains transparent
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//
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// we will instead special-case block-drawing characters.
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// see https://github.com/dankamongmen/notcurses/issues/1068
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TEST_CASE("Stacking") {
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auto nc_ = testing_notcurses();
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if(!nc_){
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return;
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}
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if(!notcurses_canutf8(nc_)){
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CHECK(0 == notcurses_stop(nc_));
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return;
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}
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int dimy, dimx;
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struct ncplane* n_ = notcurses_stddim_yx(nc_, &dimy, &dimx);
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REQUIRE(nullptr != n_);
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SUBCASE("UpperAtopLowerWhite") {
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struct ncplane_options opts = {
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0, 0, 1, 1, nullptr, "top", nullptr, 0,
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};
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auto top = ncplane_create(n_, &opts);
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REQUIRE(nullptr != top);
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CHECK(0 == ncplane_set_fg_rgb(top, 0xffffff));
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CHECK(0 == ncplane_set_fg_rgb(n_, 0xffffff));
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CHECK(1 == ncplane_putwc(top, L'\u2580'));
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CHECK(1 == ncplane_putwc(n_, L'\u2584'));
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CHECK(0 == notcurses_render(nc_));
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uint64_t channels;
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auto egc = notcurses_at_yx(nc_, 0, 0, nullptr, &channels);
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REQUIRE(nullptr != egc);
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// ought yield space with white background
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WARN(0 == strcmp(" ", egc));
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WARN(0xffffff == channels_fg_rgb(channels));
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WARN(0xffffff == channels_bg_rgb(channels));
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ncplane_destroy(top);
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}
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// common teardown
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CHECK(0 == notcurses_stop(nc_));
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}
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