50 lines
1.6 KiB
C++
50 lines
1.6 KiB
C++
#include "colour.hpp"
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#include "tap.hpp"
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int
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main (int, char**)
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{
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util::TAP::logger tap;
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// Check casting works between intergral and floating formats
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{
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util::colour4f f (1);
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util::colour<4,uint8_t> u (255);
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tap.expect_eq (f.cast<uint8_t> (), u, "cast float to u8");
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tap.expect_eq (u.cast<float> (), f, "cast u8 to float");
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}
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// Check lookups are working
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tap.expect_eq (util::colour4f::from_html ("white"), util::colour4f {1}, "HTML lookup");
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tap.expect_eq ( util::colour4f::from_x11 ("white"), util::colour4f {1}, "X11 lookup");
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// Check HSV conversions
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{
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// white: hue is undefined
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auto white = util::rgb_to_hsv ({1,1,1});
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tap.expect (util::exactly_zero (white.s) && util::exactly_equal (white.v, 1), "white hsv");
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// black: hue is undefined
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auto black = util::rgb_to_hsv ({0,0,0});
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tap.expect (util::exactly_zero (black.s) && util::exactly_zero (black.v), "black hsv");
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struct {
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const char *name;
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util::colour3f rgb;
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util::colour3f hsv;
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} TESTS[] = {
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{ "red", { 1, 0, 0, }, { 0, 1, 1, } }, // red
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{ "green", { 0, 1, 0, }, { 120, 1, 1, } }, // green
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{ "blue", { 0, 0, 1, }, { 240, 1, 1, } }, // blue
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{ "misc", { 0.75f, 0.25f, 0.75f }, { 300, 2/3.f, 0.75f } },
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};
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for (auto i: TESTS) {
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tap.expect_eq (util::rgb_to_hsv (i.rgb), i.hsv, "rgb-to-hsv %s", i.name);
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tap.expect_eq (util::hsv_to_rgb (i.hsv), i.rgb, "hsv-to-rgb %s", i.name);
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}
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}
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}
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