99 lines
2.1 KiB
Awk
99 lines
2.1 KiB
Awk
#!/usr/bin/awk -f
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BEGIN {
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print "";
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test_standard_colors();
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print "";
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test_base16_colorscheme();
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print "";
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test_6x6x6_cube();
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print "";
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test_grayscale();
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print "";
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test_true_color();
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print "";
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}
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function print_color(color) {
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printf "\033[48;5;%sm \033[0m", color
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}
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function test_standard_colors() {
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print "16 standard colors:";
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for (color = 0; color < 16; color += 1) print_color(color);
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print "";
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}
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function test_base16_colorscheme() {
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print "base16 colorscheme:";
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split("0 18 19 8 20 7 21 15 1 16 3 2 6 4 5 17", colors, " ");
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for (i = 1; i <= length(colors); i++) print_color(colors[i]);
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print "";
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}
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function test_6x6x6_cube() {
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print "6x6x6 cube (216 colors):";
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block_grid_w = 3;
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block_grid_h = 2;
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for (block_y = 0; block_y < block_grid_h; block_y++) {
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for (row = 0; row < 6; row++) {
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for (block_x = 0; block_x < block_grid_w; block_x++) {
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for (col = 0; col < 6; col++) {
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print_color(16 + col + 6*row + 6*6*block_x + block_grid_w*6*6*block_y);
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}
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}
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print "";
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}
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}
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}
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function test_grayscale() {
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print "grayscale from black to white in 24 steps:";
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for (color = 0; color < 24; color += 1) {
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print_color(16 + 6*6*6 + color)
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}
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print "";
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}
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function test_true_color() {
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print "24-bit true color test:"
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colors_count = 360;
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for (h = 0; h < colors_count; h++) {
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hsv2rgb(h / colors_count, 1, 1, rgb);
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for (i = 0; i < 3; i++) rgb[i] = int(rgb[i] * 255);
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r = rgb[0];
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g = rgb[1];
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b = rgb[2];
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printf "\033[48;2;%d;%d;%dm", r,g,b;
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printf " \033[0m";
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}
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print "";
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}
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function hsv2rgb(h, s, v, rgb) {
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if (s == 0) {
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r = g = b = v;
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} else {
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h *= 6;
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i = int(h);
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f = h - i;
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p = v * (1 - s);
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q = v * (1 - s * f);
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t = v * (1 - s * (1 - f));
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if (i == 0) {
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r = v; g = t; b = p;
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} else if (i == 1) {
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r = q; g = v; b = p;
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} else if (i == 2) {
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r = p; g = v; b = t;
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} else if (i == 3) {
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r = p; g = q; b = v;
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} else if (i == 4) {
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r = t; g = p; b = v;
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} else if (i == 5) {
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r = v; g = p; b = q;
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}
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}
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rgb[0] = r; rgb[1] = g; rgb[2] = b;
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}
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