/************************************************************************* ** ColorTest.cpp ** ** ** ** This file is part of dvisvgm -- a fast DVI to SVG converter ** ** Copyright (C) 2005-2023 Martin Gieseking ** ** ** ** This program is free software; you can redistribute it and/or ** ** modify it under the terms of the GNU General Public License as ** ** published by the Free Software Foundation; either version 3 of ** ** the License, or (at your option) any later version. ** ** ** ** This program is distributed in the hope that it will be useful, but ** ** WITHOUT ANY WARRANTY; without even the implied warranty of ** ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ** ** GNU General Public License for more details. ** ** ** ** You should have received a copy of the GNU General Public License ** ** along with this program; if not, see . ** *************************************************************************/ #include #include "Color.hpp" using namespace std; TEST(ColorTest, construct) { EXPECT_EQ(Color(uint8_t(1), uint8_t(2), uint8_t(3)).rgbString(), "#010203"); EXPECT_EQ(Color(1.0/255, 2.0/255, 3.0/255).rgbString(), "#010203"); EXPECT_EQ(Color("Blue").rgbString(), "#00f"); EXPECT_EQ(Color("blue").rgbString(), "#00f"); EXPECT_EQ(Color("invalid").rgbString(), "#000"); } TEST(ColorTest, gray) { Color c; c.setGray(10.0/255); EXPECT_EQ(c.rgbString(), "#0a0a0a"); c.setGray(uint8_t(15)); EXPECT_EQ(c.rgbString(), "#0f0f0f"); } TEST(ColorTest, hsb) { Color c; c.setHSB(20.0/360, 0.75, 0.8); // i==0 EXPECT_EQ(c.rgbString(), "#c63"); c.setHSB(60.0/360, 0.75, 0.8); // i==1 EXPECT_EQ(c.rgbString(), "#cc3"); c.setHSB(120.0/360, 1.0, 1.0); // i==2 EXPECT_EQ(c.rgbString(), "#0f0"); c.setHSB(180.0/360, 1.0, 1.0); // i==3 EXPECT_EQ(c.rgbString(), "#0ff"); c.setHSB(240.0/360, 0.75, 0.8); // i==4 EXPECT_EQ(c.rgbString(), "#33c"); c.setHSB(300.0/360, 0.75, 0.8); // i==5 EXPECT_EQ(c.rgbString(), "#c3c"); c.setHSB(0.0, 1.0, 1.0); EXPECT_EQ(c.rgbString(), "#f00"); c.setHSB(20.0/360, 0, 0.2); // s==0 EXPECT_EQ(c.rgbString(), "#333"); } TEST(ColorTest, cmyk) { Color color; color.setCMYK(0.5, 0.4, 0.6, 0.2); EXPECT_EQ(color.rgbString(), "#667a52"); double c, m, y, k; color.setRGB(0.0, 0.0, 0.0); color.getCMYK(c, m, y, k); EXPECT_DOUBLE_EQ(c, 0.0); EXPECT_DOUBLE_EQ(m, 0.0); EXPECT_DOUBLE_EQ(y, 0.0); EXPECT_DOUBLE_EQ(k, 1.0); color.setRGB(1.0, 0.0, 0.0); color.getCMYK(c, m, y, k); EXPECT_DOUBLE_EQ(c, 0.0); EXPECT_DOUBLE_EQ(m, 1.0); EXPECT_DOUBLE_EQ(y, 1.0); EXPECT_DOUBLE_EQ(k, 0.0); } TEST(ColorTest, name) { Color c; EXPECT_TRUE(c.setPSName("Magenta")); EXPECT_EQ(c.rgbString(), "#f0f"); EXPECT_FALSE(c.setPSName("mulberry")); EXPECT_TRUE(c.setPSName("mulberry", false)); EXPECT_EQ(c.rgbString(), "#a314f9"); EXPECT_FALSE(c.setPSName("#Magenta")); EXPECT_FALSE(c.setPSName("#bcdefg")); EXPECT_TRUE(c.setPSName("#abcdef")); EXPECT_EQ(c.rgbString(), "#abcdef"); EXPECT_TRUE(c.setPSName("#89A")); EXPECT_EQ(c.rgbString(), "#00089a"); EXPECT_TRUE(c.setPSName("#A98 \n ")); EXPECT_EQ(c.rgbString(), "#000a98"); } TEST(ColorTest, getXYZ) { Color c; double x, y, z; c.setRGB(1.0, 0, 0); c.getXYZ(x, y, z); EXPECT_NEAR(x, 0.412456, 0.000001); EXPECT_NEAR(y, 0.212673, 0.000001); EXPECT_NEAR(z, 0.019334, 0.000001); c.setRGB(0, 1.0, 0); c.getXYZ(x, y, z); EXPECT_NEAR(x, 0.357576, 0.000001); EXPECT_NEAR(y, 0.715152, 0.000001); EXPECT_NEAR(z, 0.119192, 0.000001); c.setRGB(0, 0, 1.0); c.getXYZ(x, y, z); EXPECT_NEAR(x, 0.180437, 0.000001); EXPECT_NEAR(y, 0.072175, 0.000001); EXPECT_NEAR(z, 0.950304, 0.000001); valarray rgb(3), xyz(3); rgb[0] = 0.2; rgb[1] = 0.75; rgb[2] = 0.9; Color::RGB2XYZ(rgb, xyz); EXPECT_NEAR(xyz[0], 0.342574, 0.000001); EXPECT_NEAR(xyz[1], 0.437554, 0.000001); EXPECT_NEAR(xyz[2], 0.811202, 0.000001); } TEST(ColorTest, getLab) { Color c; double l, a, b; c.setRGB(1.0, 0, 0); c.getLab(l, a, b); EXPECT_NEAR(l, 53.2408, 0.0001); EXPECT_NEAR(a, 80.0925, 0.0001); EXPECT_NEAR(b, 67.2032, 0.0001); c.setRGB(0, 1.0, 0); c.getLab(l, a, b); EXPECT_NEAR(l, 87.7347, 0.0001); EXPECT_NEAR(a, -86.1827, 0.0001); EXPECT_NEAR(b, 83.1793, 0.0001); c.setRGB(0, 0, 1.0); c.getLab(l, a, b); EXPECT_NEAR(l, 32.2970, 0.0001); EXPECT_NEAR(a, 79.1875, 0.0001); EXPECT_NEAR(b, -107.8602, 0.0001); valarray rgb(3), lab(3); rgb[0] = 0.2; rgb[1] = 0.75; rgb[2] = 0.9; Color::RGB2Lab(rgb, lab); EXPECT_NEAR(lab[0], 72.0647, 0.0001); EXPECT_NEAR(lab[1], -23.7597, 0.0001); EXPECT_NEAR(lab[2], -29.4733, 0.0001); } TEST(ColorTest, svgColorString) { EXPECT_EQ(Color(uint32_t(0x000000)).svgColorString(false), "black"); EXPECT_EQ(Color(uint32_t(0xffffff)).svgColorString(false), "white"); EXPECT_EQ(Color(uint32_t(0xff0000)).svgColorString(false), "red"); EXPECT_EQ(Color(uint32_t(0x9400d3)).svgColorString(false), "darkviolet"); EXPECT_EQ(Color(uint32_t(0x000001)).svgColorString(false), "#000001"); EXPECT_EQ(Color(uint32_t(0x000000)).svgColorString(true), "#000"); EXPECT_EQ(Color(uint32_t(0xffffff)).svgColorString(true), "#fff"); EXPECT_EQ(Color(uint32_t(0xff0000)).svgColorString(true), "#f00"); EXPECT_EQ(Color(uint32_t(0x9400d3)).svgColorString(true), "#9400d3"); EXPECT_EQ(Color(uint32_t(0x000001)).svgColorString(true), "#000001"); } TEST(ColorTest, components) { EXPECT_EQ(Color::numComponents(Color::ColorSpace::GRAY), 1); EXPECT_EQ(Color::numComponents(Color::ColorSpace::RGB), 3); EXPECT_EQ(Color::numComponents(Color::ColorSpace::LAB), 3); EXPECT_EQ(Color::numComponents(Color::ColorSpace::CMYK), 4); } TEST(ColorTest, scale) { EXPECT_EQ((Color(uint32_t(0x123456)) *= 0.0).rgbString(), "#000"); EXPECT_EQ((Color(uint32_t(0x123456)) *= 1.0).rgbString(), "#123456"); EXPECT_EQ((Color(uint32_t(0x123456)) *= 3.0).rgbString(), "#369d02"); EXPECT_EQ((Color(uint32_t(0x123456)) *= 0.5).rgbString(), "#091a2b"); } TEST(ColorTest, set) { Color color; vector vec{0.1, 0.2, 0.3, 0.4}; VectorIterator it(vec); color.set(Color::ColorSpace::GRAY, it); EXPECT_EQ(uint32_t(color), 0x1a1a1au); it.reset(); color.set(Color::ColorSpace::RGB, it); EXPECT_EQ(uint32_t(color), 0x1a334du); it.reset(); color.set(Color::ColorSpace::CMYK, it); EXPECT_EQ(uint32_t(color), 0x8a7a6bu); it.reset(); color.set(Color::ColorSpace::LAB, it); EXPECT_EQ(uint32_t(color), 0x010000u); }