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Added Color.h

pull/7/head
Karroffel 2017-03-03 04:10:23 +01:00
parent db011d8f2c
commit 1d61c9df93
1 changed files with 467 additions and 0 deletions
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include/godot/core/Color.h Normal file
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#ifndef COLOR_H
#define COLOR_H
#include <godot/godot_color.h>
#include <cmath>
#include <String.h>
namespace godot {
// @Todo move these to a more global file.
// or should I? 🤔
#define MIN(a, b) (a < b ? a : b)
#define MAX(a, b) (a > b ? a : b)
struct Color {
private:
static float _parse_col(const String& p_str, int p_ofs) {
int ig=0;
for(int i=0;i<2;i++) {
int c= (int) (wchar_t) 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;
}
public:
union {
struct {
float r;
float g;
float b;
float a;
};
float components[4];
};
bool operator==(const Color &p_color) const { return (r==p_color.r && g==p_color.g && b==p_color.b && a==p_color.a ); }
bool operator!=(const Color &p_color) const { return (r!=p_color.r || g!=p_color.g || b!=p_color.b || a!=p_color.a ); }
uint32_t 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;
}
uint32_t 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;
}
float gray() const
{
return (r+g+b)/3.0;
}
float 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 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 get_v() const
{
float max = MAX( r, g );
max = MAX( max, b );
return max;
}
void set_hsv(float p_h, float p_s, float p_v, float p_alpha=1.0)
{
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 = ::fmod(p_h,6);
i = ::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;
}
}
float& operator[](int idx) {
return components[idx];
}
const float& operator[](int idx) const {
return components[idx];
}
void invert()
{
r=1.0-r;
g=1.0-g;
b=1.0-b;
}
void contrast()
{
r=::fmod(r+0.5,1.0);
g=::fmod(g+0.5,1.0);
b=::fmod(b+0.5,1.0);
}
Color inverted() const
{
Color c=*this;
c.invert();
return c;
}
Color contrasted() const
{
Color c=*this;
c.contrast();
return c;
}
Color linear_interpolate(const Color& p_b, float p_t) const {
Color res=*this;
res.r+= (p_t * (p_b.r-r));
res.g+= (p_t * (p_b.g-g));
res.b+= (p_t * (p_b.b-b));
res.a+= (p_t * (p_b.a-a));
return res;
}
Color blend(const Color& p_over) const {
Color res;
float sa = 1.0 - p_over.a;
res.a = a*sa+p_over.a;
if (res.a==0) {
return Color(0,0,0,0);
} else {
res.r = (r*a*sa + p_over.r * p_over.a)/res.a;
res.g = (g*a*sa + p_over.g * p_over.a)/res.a;
res.b = (b*a*sa + p_over.b * p_over.a)/res.a;
}
return res;
}
Color to_linear() const {
return Color(
r<0.04045 ? r * (1.0 / 12.92) : ::pow((r + 0.055) * (1.0 / (1 + 0.055)), 2.4),
g<0.04045 ? g * (1.0 / 12.92) : ::pow((g + 0.055) * (1.0 / (1 + 0.055)), 2.4),
b<0.04045 ? b * (1.0 / 12.92) : ::pow((b + 0.055) * (1.0 / (1 + 0.055)), 2.4),
a
);
}
static 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 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 {
// @Todo error reporting
// ERR_EXPLAIN("Invalid Color Code: "+p_color);
// ERR_FAIL_V(Color());
return Color();
}
int a=255;
if (alpha) {
a=_parse_col(color,0);
if (a<0) {
// @Todo error reporting
// ERR_EXPLAIN("Invalid Color Code: "+p_color);
// ERR_FAIL_V(Color());
return Color();
}
}
int from=alpha?2:0;
int r=_parse_col(color,from+0);
if (r<0) {
// @Todo error reporting
// ERR_EXPLAIN("Invalid Color Code: "+p_color);
// ERR_FAIL_V(Color());
return Color();
}
int g=_parse_col(color,from+2);
if (g<0) {
// @Todo error reporting
// ERR_EXPLAIN("Invalid Color Code: "+p_color);
// ERR_FAIL_V(Color());
return Color();
}
int b=_parse_col(color,from+4);
if (b<0) {
// @Todo error reporting
// ERR_EXPLAIN("Invalid Color Code: "+p_color);
// ERR_FAIL_V(Color());
return Color();
}
return Color(r/255.0,g/255.0,b/255.0,a/255.0);
}
static bool 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;
}
private:
#ifndef CLAMP
#define CLAMP(m_a,m_min,m_max) (((m_a)<(m_min))?(m_min):(((m_a)>(m_max))?m_max:m_a))
#endif
static 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++) {
wchar_t 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 wchar_t*)c;
ret = cs + ret;
}
return ret;
}
public:
String to_html(bool p_alpha=true) 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;
}
bool operator<(const Color& p_color) const; //used in set keys
operator String() const
{
return String(); // @Todo
}
/**
* No construct parameters, r=0, g=0, b=0. a=255
*/
Color() {
r=0; g=0; b=0; a=1.0;
}
/**
* RGB / RGBA construct parameters. Alpha is optional, but defaults to 1.0
*/
Color(float p_r,float p_g,float p_b,float p_a=1.0) { r=p_r; g=p_g; b=p_b; a=p_a; }
};
bool Color::operator<(const Color& p_color) const {
if (r==p_color.r) {
if (g==p_color.g) {
if(b==p_color.b) {
return (a<p_color.a);
} else
return (b<p_color.b);
} else
return g<p_color.g;
} else
return r<p_color.r;
}
}
#endif // COLOR_H