395 lines
8 KiB
C++
395 lines
8 KiB
C++
/*************************************************************************/
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/* color.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "color.h"
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#include "color_names.inc"
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#include "map.h"
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#include "math_funcs.h"
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#include "print_string.h"
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uint32_t Color::to_ARGB32() const {
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uint32_t c = (uint8_t)(a * 255);
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c <<= 8;
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c |= (uint8_t)(r * 255);
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c <<= 8;
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c |= (uint8_t)(g * 255);
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c <<= 8;
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c |= (uint8_t)(b * 255);
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return c;
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}
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uint32_t Color::to_32() const {
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uint32_t c = (uint8_t)(a * 255);
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c <<= 8;
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c |= (uint8_t)(r * 255);
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c <<= 8;
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c |= (uint8_t)(g * 255);
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c <<= 8;
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c |= (uint8_t)(b * 255);
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return c;
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}
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float Color::get_h() const {
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float min = MIN(r, g);
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min = MIN(min, b);
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float max = MAX(r, g);
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max = MAX(max, b);
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float delta = max - min;
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if (delta == 0)
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return 0;
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float h;
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if (r == max)
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h = (g - b) / delta; // between yellow & magenta
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else if (g == max)
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h = 2 + (b - r) / delta; // between cyan & yellow
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else
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h = 4 + (r - g) / delta; // between magenta & cyan
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h /= 6.0;
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if (h < 0)
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h += 1.0;
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return h;
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}
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float Color::get_s() const {
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float min = MIN(r, g);
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min = MIN(min, b);
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float max = MAX(r, g);
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max = MAX(max, b);
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float delta = max - min;
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return (max != 0) ? (delta / max) : 0;
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}
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float Color::get_v() const {
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float max = MAX(r, g);
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max = MAX(max, b);
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return max;
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}
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void Color::set_hsv(float p_h, float p_s, float p_v, float p_alpha) {
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int i;
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float f, p, q, t;
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a = p_alpha;
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if (p_s == 0) {
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// acp_hromatic (grey)
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r = g = b = p_v;
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return;
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}
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p_h *= 6.0;
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p_h = Math::fmod(p_h, 6);
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i = Math::floor(p_h);
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f = p_h - i;
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p = p_v * (1 - p_s);
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q = p_v * (1 - p_s * f);
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t = p_v * (1 - p_s * (1 - f));
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switch (i) {
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case 0: // Red is the dominant color
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r = p_v;
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g = t;
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b = p;
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break;
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case 1: // Green is the dominant color
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r = q;
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g = p_v;
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b = p;
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break;
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case 2:
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r = p;
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g = p_v;
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b = t;
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break;
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case 3: // Blue is the dominant color
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r = p;
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g = q;
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b = p_v;
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break;
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case 4:
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r = t;
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g = p;
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b = p_v;
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break;
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default: // (5) Red is the dominant color
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r = p_v;
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g = p;
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b = q;
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break;
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}
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}
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void Color::invert() {
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r = 1.0 - r;
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g = 1.0 - g;
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b = 1.0 - b;
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}
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void Color::contrast() {
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r = Math::fmod(r + 0.5, 1.0);
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g = Math::fmod(g + 0.5, 1.0);
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b = Math::fmod(b + 0.5, 1.0);
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}
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Color Color::hex(uint32_t p_hex) {
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float a = (p_hex & 0xFF) / 255.0;
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p_hex >>= 8;
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float b = (p_hex & 0xFF) / 255.0;
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p_hex >>= 8;
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float g = (p_hex & 0xFF) / 255.0;
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p_hex >>= 8;
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float r = (p_hex & 0xFF) / 255.0;
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return Color(r, g, b, a);
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}
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static float _parse_col(const String &p_str, int p_ofs) {
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int ig = 0;
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for (int i = 0; i < 2; i++) {
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int c = p_str[i + p_ofs];
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int v = 0;
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if (c >= '0' && c <= '9') {
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v = c - '0';
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} else if (c >= 'a' && c <= 'f') {
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v = c - 'a';
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v += 10;
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} else if (c >= 'A' && c <= 'F') {
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v = c - 'A';
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v += 10;
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} else {
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return -1;
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}
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if (i == 0)
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ig += v * 16;
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else
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ig += v;
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}
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return ig;
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}
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Color Color::inverted() const {
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Color c = *this;
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c.invert();
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return c;
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}
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Color Color::contrasted() const {
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Color c = *this;
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c.contrast();
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return c;
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}
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Color Color::html(const String &p_color) {
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String color = p_color;
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if (color.length() == 0)
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return Color();
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if (color[0] == '#')
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color = color.substr(1, color.length() - 1);
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bool alpha = false;
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if (color.length() == 8) {
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alpha = true;
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} else if (color.length() == 6) {
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alpha = false;
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} else {
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ERR_EXPLAIN("Invalid Color Code: " + p_color);
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ERR_FAIL_V(Color());
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}
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int a = 255;
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if (alpha) {
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a = _parse_col(color, 0);
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if (a < 0) {
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ERR_EXPLAIN("Invalid Color Code: " + p_color);
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ERR_FAIL_V(Color());
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}
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}
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int from = alpha ? 2 : 0;
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int r = _parse_col(color, from + 0);
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if (r < 0) {
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ERR_EXPLAIN("Invalid Color Code: " + p_color);
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ERR_FAIL_V(Color());
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}
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int g = _parse_col(color, from + 2);
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if (g < 0) {
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ERR_EXPLAIN("Invalid Color Code: " + p_color);
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ERR_FAIL_V(Color());
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}
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int b = _parse_col(color, from + 4);
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if (b < 0) {
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ERR_EXPLAIN("Invalid Color Code: " + p_color);
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ERR_FAIL_V(Color());
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}
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return Color(r / 255.0, g / 255.0, b / 255.0, a / 255.0);
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}
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bool Color::html_is_valid(const String &p_color) {
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String color = p_color;
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if (color.length() == 0)
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return false;
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if (color[0] == '#')
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color = color.substr(1, color.length() - 1);
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bool alpha = false;
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if (color.length() == 8) {
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alpha = true;
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} else if (color.length() == 6) {
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alpha = false;
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} else {
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return false;
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}
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int a = 255;
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if (alpha) {
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a = _parse_col(color, 0);
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if (a < 0) {
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return false;
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}
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}
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int from = alpha ? 2 : 0;
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int r = _parse_col(color, from + 0);
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if (r < 0) {
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return false;
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}
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int g = _parse_col(color, from + 2);
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if (g < 0) {
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return false;
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}
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int b = _parse_col(color, from + 4);
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if (b < 0) {
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return false;
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}
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return true;
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}
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Color Color::named(const String &p_name) {
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if (_named_colors.empty()) _populate_named_colors(); // from color_names.inc
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String name = p_name;
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// Normalize name
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name = name.replace(" ", "");
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name = name.replace("-", "");
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name = name.replace("_", "");
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name = name.replace("'", "");
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name = name.replace(".", "");
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name = name.to_lower();
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const Map<String, Color>::Element *color = _named_colors.find(name);
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if (color) {
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return color->value();
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} else {
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ERR_EXPLAIN("Invalid Color Name: " + p_name);
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ERR_FAIL_V(Color());
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}
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}
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void Color::cleanup() {
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_named_colors.clear();
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}
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String _to_hex(float p_val) {
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int v = p_val * 255;
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v = CLAMP(v, 0, 255);
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String ret;
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for (int i = 0; i < 2; i++) {
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CharType c[2] = { 0, 0 };
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int lv = v & 0xF;
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if (lv < 10)
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c[0] = '0' + lv;
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else
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c[0] = 'a' + lv - 10;
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v >>= 4;
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String cs = (const CharType *)c;
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ret = cs + ret;
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}
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return ret;
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}
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String Color::to_html(bool p_alpha) const {
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String txt;
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txt += _to_hex(r);
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txt += _to_hex(g);
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txt += _to_hex(b);
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if (p_alpha)
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txt = _to_hex(a) + txt;
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return txt;
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}
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float Color::gray() const {
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return (r + g + b) / 3.0;
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}
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Color::operator String() const {
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return rtos(r) + ", " + rtos(g) + ", " + rtos(b) + ", " + rtos(a);
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}
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