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godot/core/color.cpp
Rémi Verschelde 3890256fc5 Style: Cleanups, added headers, renamed files 
Made sure files in core/ and tools/ have a proper Godot license header
when written by us. Also renamed aabb.{cpp,h} and object_type_db.{cpp,h}
to rect3.{cpp,h} and class_db.{cpp,h} respectively.

Also added a proper header to core/io/base64.{c,h} after clarifying
the licensing with the original author (public domain).
2017-01-16 08:04:23 +01:00

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/*************************************************************************/
/* color.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 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"
#include "map.h"
#include "color_names.inc"
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;
p_h = Math::fmod(p_h,6);
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: // Red is the dominant color
r = p_v;
g = t;
b = p;
break;
case 1: // Green is the dominant color
r = q;
g = p_v;
b = p;
break;
case 2:
r = p;
g = p_v;
b = t;
break;
case 3: // Blue is the dominant color
r = p;
g = q;
b = p_v;
break;
case 4:
r = t;
g = p;
b = p_v;
break;
default: // (5) Red is the dominant color
r = p_v;
g = p;
b = q;
break;
}
}
void Color::invert() {
r=1.0-r;
g=1.0-g;
b=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.contrast();
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;
}
Color Color::named(const String &p_name) {
if (_named_colors.empty()) _populate_named_colors(); // from color_names.inc
String name = p_name;
// Normalize name
name = name.replace(" ", "");
name = name.replace("-", "");
name = name.replace("_", "");
name = name.replace("'", "");
name = name.replace(".", "");
name = name.to_lower();
const Map<String, Color>::Element* color = _named_colors.find(name);
if(color) {
return color->value();
} else {
ERR_EXPLAIN("Invalid Color Name: "+p_name);
ERR_FAIL_V(Color());
}
}
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);
}
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