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