// ============================================================ // // // // File : AW_rgb.cxx // // Purpose : // // // // Coded by Ralf Westram (coder@reallysoft.de) in June 2016 // // http://www.arb-home.de/ // // // // ============================================================ // #include "aw_rgb.hxx" static AW_rgb16 CRAZY_PINK("#C0C"); static AW_rgb16 convert_xcolorname(const char *xcolorname, bool& failed); void AW_rgb16::rescale(uint16_t my_max) { float scale = MAX/my_max; R = R*scale + 0.5; G = G*scale + 0.5; B = B*scale + 0.5; } AW_rgb16::AW_rgb16(const char *colorname) { /*! converts colorname * @param colorname either color hexstring (allowed for orange: '#F80', '#ff8800', '#fFF888000' or '#ffff88880000') or X color name (e.g. "green") */ bool failed = (colorname[0] != '#'); if (!failed) { const char *end; unsigned long num = strtoul(colorname+1, const_cast(&end), 16); int length = end-colorname-1; switch (length) { case 3: R = num >> 8; G = (num >> 4) & 0xf; B = num & 0xf; rescale(0xf); break; case 6: R = num >> 16; G = (num >> 8) & 0xff; B = num & 0xff; rescale(0xff); break; case 9: R = num >> 24; G = (num >> 12) & 0xfff; B = num & 0xfff; rescale(0xfff); break; case 12: R = num >> 32; G = (num >> 16) & 0xffff; B = num & 0xffff; break; default: aw_assert(0); // hex color spec has invalid length failed = true; break; } } if (failed) *this = convert_xcolorname(colorname, failed); if (failed) { fprintf(stderr, "Warning: Failed to interpret color '%s' - fallback to crazy pink\n", colorname); *this = CRAZY_PINK; } } const char *AW_rgb16::ascii() const { const int FIXEDLEN = 1+3*4; static char buffer[FIXEDLEN+1]; #if defined(ASSERTION_USED) int printed = #endif sprintf(buffer, "#%04x%04x%04x", R, G, B); aw_assert(printed == FIXEDLEN); return buffer; } // -------------------------------------------------------------------------------- #ifdef UNIT_TESTS #ifndef TEST_UNIT_H #include #endif #include #define TEST_ASCII_COLOR_CONVERT(i,o) TEST_EXPECT_EQUAL(AW_rgb16(i).ascii(),o) #define TEST_ASCII_COLOR_IDENT(c) TEST_ASCII_COLOR_CONVERT(c,c); #define TEST_NORMALIZED_CONVERSION(c) TEST_EXPECT_EQUAL(AW_rgb16(AW_rgb_normalized(AW_rgb16(c))).ascii(), c); #define TEST_NORMALIZED_CONTAINS(col,expected) TEST_EXPECT_EQUAL(GBS_global_string("(%.2f,%.2f,%.2f)", \ (col).r(), (col).g(), (col).b()), \ expected) #define TEST_DIFF_CONTAINS(diff,expected) TEST_NORMALIZED_CONTAINS(diff,expected) void TEST_rgb() { // Note: more related tests in AW_preset.cxx@RGB_TESTS // check construction from diff.-length color specifications AW_rgb16 orange4("#f80"); AW_rgb16 orange8("#ff8800"); AW_rgb16 orange12("#fff888000"); AW_rgb16 orange16("#ffff88880000"); TEST_EXPECT(orange16 == AW_rgb16(65535, 34952, 0)); TEST_EXPECT(orange12 == orange16); TEST_EXPECT(orange8 == orange12); TEST_EXPECT(orange4 == orange8); AW_rgb16 lblue4("#004"); AW_rgb16 lblue8("#000044"); AW_rgb16 lblue12("#000000444"); AW_rgb16 lblue16("#000000004444"); TEST_EXPECT(lblue16 == AW_rgb16(0, 0, 17476)); TEST_EXPECT(lblue12 == lblue16); TEST_EXPECT(lblue8 == lblue12); TEST_EXPECT(lblue4 == lblue8); TEST_EXPECT_EQUAL(lblue8.ascii(), "#000000004444"); TEST_ASCII_COLOR_CONVERT("#1" "2" "3", "#1111" "2222" "3333"); TEST_ASCII_COLOR_CONVERT("#45" "67" "89", "#4545" "6767" "8989"); TEST_ASCII_COLOR_CONVERT("#678" "9ab" "cde", "#6786" "9ab9" "cdec"); TEST_ASCII_COLOR_CONVERT("#001" "010" "100", "#0010" "0100" "1001"); TEST_ASCII_COLOR_IDENT("#0123456789ab"); TEST_ASCII_COLOR_IDENT("#fedcba987654"); // conversion normalized -> 16bit for special values TEST_EXPECT_EQUAL(AW_rgb16(AW_rgb_normalized(0.25, 0.5, 0.75 )).ascii(), "#3fff" "7fff" "bfff"); TEST_EXPECT_EQUAL(AW_rgb16(AW_rgb_normalized(1./3, 1./5, 1./7 )).ascii(), "#5555" "3333" "2492"); TEST_EXPECT_EQUAL(AW_rgb16(AW_rgb_normalized(.1, .01, .001 )).ascii(), "#1999" "028f" "0041"); TEST_EXPECT_EQUAL(AW_rgb16(AW_rgb_normalized(.0001, .00005, .00002)).ascii(), "#0006" "0003" "0001"); // test conversion 16bit -> normalized -> 16bit is stable TEST_NORMALIZED_CONVERSION("#000000000000"); TEST_NORMALIZED_CONVERSION("#0123456789ab"); TEST_NORMALIZED_CONVERSION("#ffffffffffff"); // invalid colors TEST_EXPECT(AW_rgb16("kashdkjasdh") == CRAZY_PINK); TEST_EXPECT(AW_rgb16("") == CRAZY_PINK); } void TEST_rgb_diff() { AW_rgb16 orange("#f80"); AW_rgb16 blue("#004"); AW_rgb_diff blue2orange = orange - blue; AW_rgb16 calc_orange = blue + blue2orange; TEST_EXPECT(calc_orange == orange); AW_rgb_diff orange2blue = -blue2orange; AW_rgb16 calc_blue = orange + orange2blue; TEST_EXPECT(calc_blue == blue); for (float part = 0.1; part<1.0; part += 0.1) { AW_rgb16 mix1 = orange + part * orange2blue; AW_rgb16 mix2 = blue + (1-part) * blue2orange; TEST_EXPECT(mix1 == mix2); } // check that color calculation does not overflow: AW_rgb16 black("#000"); AW_rgb16 white("#fff"); AW_rgb_diff black2white = white-black; AW_rgb16 whiter = white + black2white; TEST_EXPECT_EQUAL(whiter.ascii(), "#ffffffffffff"); TEST_EXPECT(whiter == white); AW_rgb16 blacker = black - black2white; TEST_EXPECT_EQUAL(blacker.ascii(), "#000000000000"); TEST_EXPECT(blacker == black); // summarized diff: AW_rgb16 red("#f00"); AW_rgb16 green("#0f0"); AW_rgb_diff blue2red = red-blue; AW_rgb_diff blue2green = green-blue; TEST_DIFF_CONTAINS(blue2red, "(1.00,0.00,-0.27)"); TEST_DIFF_CONTAINS(blue2green, "(0.00,1.00,-0.27)"); TEST_DIFF_CONTAINS(blue2green.abs(), "(0.00,1.00,0.27)"); { AW_rgb_diff sum = blue2red + blue2green; AW_rgb_diff abssum = blue2red.abs() + blue2green.abs(); AW_rgb_diff maxabsdiff = max(blue2red.abs(), blue2green.abs()); TEST_DIFF_CONTAINS(sum, "(1.00,1.00,-0.53)"); TEST_DIFF_CONTAINS(abssum, "(1.00,1.00,0.53)"); TEST_DIFF_CONTAINS(maxabsdiff, "(1.00,1.00,0.27)"); } AW_rgb16 magenta("#f0f"); AW_rgb16 cyan("#0ff"); AW_rgb_diff orange2magenta = magenta-orange; AW_rgb_diff orange2cyan = cyan-orange; TEST_DIFF_CONTAINS(orange2magenta, "(0.00,-0.53,1.00)"); TEST_DIFF_CONTAINS(orange2cyan, "(-1.00,0.47,1.00)"); { AW_rgb_diff sum = orange2magenta + orange2cyan; AW_rgb_diff abssum = orange2magenta.abs() + orange2cyan.abs(); AW_rgb_diff maxabsdiff = max(orange2magenta.abs(), orange2cyan.abs()); TEST_DIFF_CONTAINS(sum, "(-1.00,-0.07,2.00)"); TEST_DIFF_CONTAINS(abssum, "(1.00,1.00,2.00)"); TEST_DIFF_CONTAINS(maxabsdiff, "(1.00,0.53,1.00)"); } } #endif // UNIT_TESTS // -------------------------------------------------------------------------------- #include "aw_root.hxx" #include "aw_window.hxx" #include "aw_window_Xm.hxx" static AW_rgb16 convert_xcolorname(const char *xcolorname, bool& failed) { XColor col, unused; if (AW_root::SINGLETON) { // only works if window was set (by caller) AW_root_Motif *mroot = AW_root::SINGLETON->prvt; failed = !XLookupColor(mroot->display, mroot->colormap, xcolorname, &col, // exact color &unused); // screen-color } else { failed = true; } return failed ? AW_rgb16() : AW_rgb16(col.red, col.green, col.blue); }