/* Copyright (C) 2018 June McEnroe * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero 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 Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see . */ #include #include #include #include #include #include #include #include #include #include static const struct Hsv { double h, s, v; } R = { 0.0, 1.0, 1.0 }, Y = { 60.0, 1.0, 1.0 }, G = { 120.0, 1.0, 1.0 }, C = { 180.0, 1.0, 1.0 }, B = { 240.0, 1.0, 1.0 }, M = { 300.0, 1.0, 1.0 }; static struct Hsv x(struct Hsv o, double hd, double sf, double vf) { return (struct Hsv) { o.h + hd, o.s * sf, o.v * vf }; } struct Ansi { enum { BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE }; struct Hsv dark[8]; struct Hsv light[8]; }; struct Terminal { struct Ansi ansi; struct Hsv background, text, bold, selection, cursor; }; #define HSV_LEN(x) (sizeof(x) / sizeof(struct Hsv)) struct Scheme { size_t len; union { struct Hsv hsv; struct Ansi ansi; struct Terminal terminal; }; }; static struct Scheme ansi(void) { struct Ansi a = { .light = { [BLACK] = x(R, +45.0, 0.3, 0.3), [RED] = x(R, +10.0, 0.9, 0.8), [GREEN] = x(G, -55.0, 0.8, 0.6), [YELLOW] = x(Y, -20.0, 0.8, 0.8), [BLUE] = x(B, -55.0, 0.4, 0.5), [MAGENTA] = x(M, +45.0, 0.4, 0.6), [CYAN] = x(C, -60.0, 0.3, 0.6), [WHITE] = x(R, +45.0, 0.3, 0.8), }, }; a.dark[BLACK] = x(a.light[BLACK], 0.0, 1.0, 0.3); a.dark[WHITE] = x(a.light[WHITE], 0.0, 1.0, 0.6); for (int i = RED; i < WHITE; ++i) { a.dark[i] = x(a.light[i], 0.0, 1.0, 0.8); } return (struct Scheme) { .len = HSV_LEN(a), .ansi = a }; } static struct Scheme terminal(void) { struct Ansi a = ansi().ansi; struct Terminal t = { .ansi = a, .background = x(a.dark[BLACK], 0.0, 1.0, 0.9), .text = x(a.light[WHITE], 0.0, 1.0, 0.9), .bold = x(a.light[WHITE], 0.0, 1.0, 1.0), .selection = x(a.light[RED], +10.0, 1.0, 0.8), .cursor = x(a.dark[WHITE], 0.0, 1.0, 0.8), }; return (struct Scheme) { .len = HSV_LEN(t), .terminal = t }; } static void hsv(const struct Hsv *hsv, size_t len) { for (size_t i = 0; i < len; ++i) { printf("%g,%g,%g\n", hsv[i].h, hsv[i].s, hsv[i].v); } } struct Rgb { uint8_t r, g, b; }; static struct Rgb toRgb(struct Hsv hsv) { double c = hsv.v * hsv.s; double h = hsv.h / 60.0; double x = c * (1.0 - fabs(fmod(h, 2.0) - 1.0)); double m = hsv.v - c; double r = m, g = m, b = m; if (h <= 1.0) { r += c; g += x; } else if (h <= 2.0) { r += x; g += c; } else if (h <= 3.0) { g += c; b += x; } else if (h <= 4.0) { g += x; b += c; } else if (h <= 5.0) { r += x; b += c; } else if (h <= 6.0) { r += c; b += x; } return (struct Rgb) { r * 255.0, g * 255.0, b * 255.0 }; } static void hex(const struct Hsv *hsv, size_t len) { for (size_t i = 0; i < len; ++i) { struct Rgb rgb = toRgb(hsv[i]); printf("%02x%02x%02x\n", rgb.r, rgb.g, rgb.b); } } static void linux(const struct Hsv *hsv, size_t len) { if (len > 16) len = 16; for (size_t i = 0; i < len; ++i) { struct Rgb rgb = toRgb(hsv[i]); printf("\x1B]P%zx%02x%02x%02x", i, rgb.r, rgb.g, rgb.b); } } static uint32_t crc; static void pngWrite(const void *ptr, size_t size) { fwrite(ptr, size, 1, stdout); if (ferror(stdout)) err(EX_IOERR, "(stdout)"); crc = crc32(crc, ptr, size); } static void pngInt(uint32_t host) { uint32_t net = htonl(host); pngWrite(&net, 4); } static void pngChunk(const char *type, uint32_t size) { pngInt(size); crc = crc32(0, Z_NULL, 0); pngWrite(type, 4); } static void png(const struct Hsv *hsv, size_t len) { if (len > 256) len = 256; uint32_t swatchWidth = 64; uint32_t swatchHeight = 64; uint32_t columns = 8; uint32_t rows = (len + columns - 1) / columns; uint32_t width = swatchWidth * columns; uint32_t height = swatchHeight * rows; pngWrite("\x89PNG\r\n\x1A\n", 8); pngChunk("IHDR", 13); pngInt(width); pngInt(height); pngWrite("\x08\x03\0\0\0", 5); pngInt(crc); pngChunk("PLTE", 3 * len); for (uint32_t i = 0; i < len; ++i) { struct Rgb rgb = toRgb(hsv[i]); pngWrite(&rgb, 3); } pngInt(crc); uint8_t data[height][1 + width]; memset(data, 0, sizeof(data)); for (uint32_t y = 0; y < height; ++y) { enum { NONE, SUB, UP, AVERAGE, PAETH }; data[y][0] = (y % swatchHeight) ? UP : SUB; } for (uint32_t i = 0; i < len; ++i) { uint32_t y = swatchHeight * (i / columns); uint32_t x = swatchWidth * (i % columns); data[y][1 + x] = x ? 1 : i; } uLong size = compressBound(sizeof(data)); uint8_t deflate[size]; int error = compress(deflate, &size, (Byte *)data, sizeof(data)); if (error != Z_OK) errx(EX_SOFTWARE, "compress: %d", error); pngChunk("IDAT", size); pngWrite(deflate, size); pngInt(crc); pngChunk("IEND", 0); pngInt(crc); } int main(int argc, char *argv[]) { struct Scheme (*gen)(void) = ansi; void (*out)(const struct Hsv *, size_t len) = hex; int opt; while (0 < (opt = getopt(argc, argv, "aghltx"))) { switch (opt) { case 'a': gen = ansi; break; case 'g': out = png; break; case 'h': out = hsv; break; case 'l': out = linux; break; case 't': gen = terminal; break; case 'x': out = hex; break; default: return EX_USAGE; } } struct Scheme scheme = gen(); out(&scheme.hsv, scheme.len); return EX_OK; }