mirror of
https://github.com/processing/processing4.git
synced 2026-02-13 02:20:45 +01:00
619 lines
21 KiB
C++
619 lines
21 KiB
C++
//----------------------------------------------------------------------------
|
|
// Anti-Grain Geometry - Version 2.3
|
|
// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
|
|
//
|
|
// Permission to copy, use, modify, sell and distribute this software
|
|
// is granted provided this copyright notice appears in all copies.
|
|
// This software is provided "as is" without express or implied
|
|
// warranty, and with no claim as to its suitability for any purpose.
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
//
|
|
// Adaptation for high precision colors has been sponsored by
|
|
// Liberty Technology Systems, Inc., visit http://lib-sys.com
|
|
//
|
|
// Liberty Technology Systems, Inc. is the provider of
|
|
// PostScript and PDF technology for software developers.
|
|
//
|
|
//----------------------------------------------------------------------------
|
|
// Contact: mcseem@antigrain.com
|
|
// mcseemagg@yahoo.com
|
|
// http://www.antigrain.com
|
|
//----------------------------------------------------------------------------
|
|
|
|
#ifndef AGG_COLOR_RGBA_INCLUDED
|
|
#define AGG_COLOR_RGBA_INCLUDED
|
|
|
|
#include <math.h>
|
|
#include "agg_basics.h"
|
|
|
|
namespace agg
|
|
{
|
|
// Supported byte orders for RGB and RGBA pixel formats
|
|
//=======================================================================
|
|
struct order_rgb { enum rgb_e { R=0, G=1, B=2, rgb_tag }; }; //----order_rgb
|
|
struct order_bgr { enum bgr_e { B=0, G=1, R=2, rgb_tag }; }; //----order_bgr
|
|
struct order_rgba { enum rgba_e { R=0, G=1, B=2, A=3, rgba_tag }; }; //----order_rgba
|
|
struct order_argb { enum argb_e { A=0, R=1, G=2, B=3, rgba_tag }; }; //----order_argb
|
|
struct order_abgr { enum abgr_e { A=0, B=1, G=2, R=3, rgba_tag }; }; //----order_abgr
|
|
struct order_bgra { enum bgra_e { B=0, G=1, R=2, A=3, rgba_tag }; }; //----order_bgra
|
|
|
|
//====================================================================rgba
|
|
struct rgba
|
|
{
|
|
typedef double value_type;
|
|
|
|
double r;
|
|
double g;
|
|
double b;
|
|
double a;
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba() {}
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba(double r_, double g_, double b_, double a_=1.0) :
|
|
r(r_), g(g_), b(b_), a(a_) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba(const rgba& c, double a_) : r(c.r), g(c.g), b(c.b), a(a_) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
void clear()
|
|
{
|
|
r = g = b = a = 0;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const rgba& transparent()
|
|
{
|
|
a = 0.0;
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const rgba& opacity(double a_)
|
|
{
|
|
if(a_ < 0.0) a_ = 0.0;
|
|
if(a_ > 1.0) a_ = 1.0;
|
|
a = a_;
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
double opacity() const
|
|
{
|
|
return a;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const rgba& premultiply()
|
|
{
|
|
r *= a;
|
|
g *= a;
|
|
b *= a;
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const rgba& premultiply(double a_)
|
|
{
|
|
if(a <= 0.0 || a_ <= 0.0)
|
|
{
|
|
r = g = b = a = 0.0;
|
|
return *this;
|
|
}
|
|
a_ /= a;
|
|
r *= a_;
|
|
g *= a_;
|
|
b *= a_;
|
|
a = a_;
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const rgba& demultiply()
|
|
{
|
|
if(a == 0)
|
|
{
|
|
r = g = b = 0;
|
|
return *this;
|
|
}
|
|
double a_ = 1.0 / a;
|
|
r *= a_;
|
|
g *= a_;
|
|
b *= a_;
|
|
return *this;
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba gradient(rgba c, double k) const
|
|
{
|
|
rgba ret;
|
|
ret.r = r + (c.r - r) * k;
|
|
ret.g = g + (c.g - g) * k;
|
|
ret.b = b + (c.b - b) * k;
|
|
ret.a = a + (c.a - a) * k;
|
|
return ret;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
static rgba no_color() { return rgba(0,0,0,0); }
|
|
|
|
//--------------------------------------------------------------------
|
|
static rgba from_wavelength(double wl, double gamma = 1.0);
|
|
|
|
//--------------------------------------------------------------------
|
|
explicit rgba(double wavelen, double gamma=1.0)
|
|
{
|
|
*this = from_wavelength(wavelen, gamma);
|
|
}
|
|
|
|
};
|
|
|
|
//----------------------------------------------------------------rgba_pre
|
|
inline rgba rgba_pre(double r, double g, double b, double a=1.0)
|
|
{
|
|
return rgba(r, g, b, a).premultiply();
|
|
}
|
|
inline rgba rgba_pre(const rgba& c)
|
|
{
|
|
return rgba(c).premultiply();
|
|
}
|
|
inline rgba rgba_pre(const rgba& c, double a)
|
|
{
|
|
return rgba(c, a).premultiply();
|
|
}
|
|
|
|
//------------------------------------------------------------------------
|
|
inline rgba rgba::from_wavelength(double wl, double gamma)
|
|
{
|
|
rgba t(0.0, 0.0, 0.0);
|
|
|
|
if(wl >= 380.0 && wl <= 440.0)
|
|
{
|
|
t.r = -1.0 * (wl - 440.0) / (440.0 - 380.0);
|
|
t.b = 1.0;
|
|
}
|
|
else
|
|
if(wl >= 440.0 && wl <= 490.0)
|
|
{
|
|
t.g = (wl - 440.0) / (490.0 - 440.0);
|
|
t.b = 1.0;
|
|
}
|
|
else
|
|
if(wl >= 490.0 && wl <= 510.0)
|
|
{
|
|
t.g = 1.0;
|
|
t.b = -1.0 * (wl - 510.0) / (510.0 - 490.0);
|
|
}
|
|
else
|
|
if(wl >= 510.0 && wl <= 580.0)
|
|
{
|
|
t.r = (wl - 510.0) / (580.0 - 510.0);
|
|
t.g = 1.0;
|
|
}
|
|
else
|
|
if(wl >= 580.0 && wl <= 645.0)
|
|
{
|
|
t.r = 1.0;
|
|
t.g = -1.0 * (wl - 645.0) / (645.0 - 580.0);
|
|
}
|
|
else
|
|
if(wl >= 645.0 && wl <= 780.0)
|
|
{
|
|
t.r = 1.0;
|
|
}
|
|
|
|
double s = 1.0;
|
|
if(wl > 700.0) s = 0.3 + 0.7 * (780.0 - wl) / (780.0 - 700.0);
|
|
else if(wl < 420.0) s = 0.3 + 0.7 * (wl - 380.0) / (420.0 - 380.0);
|
|
|
|
t.r = pow(t.r * s, gamma);
|
|
t.g = pow(t.g * s, gamma);
|
|
t.b = pow(t.b * s, gamma);
|
|
return t;
|
|
}
|
|
|
|
|
|
|
|
|
|
//===================================================================rgba8
|
|
struct rgba8
|
|
{
|
|
typedef int8u value_type;
|
|
typedef int32u calc_type;
|
|
typedef int32 long_type;
|
|
enum base_scale_e
|
|
{
|
|
base_shift = 8,
|
|
base_size = 1 << base_shift,
|
|
base_mask = base_size - 1
|
|
};
|
|
typedef rgba8 self_type;
|
|
|
|
|
|
value_type r;
|
|
value_type g;
|
|
value_type b;
|
|
value_type a;
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba8() {}
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba8(unsigned r_, unsigned g_, unsigned b_, unsigned a_=base_mask) :
|
|
r(value_type(r_)),
|
|
g(value_type(g_)),
|
|
b(value_type(b_)),
|
|
a(value_type(a_)) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba8(const rgba& c, double a_) :
|
|
r(value_type(c.r * double(base_mask) + 0.5)),
|
|
g(value_type(c.g * double(base_mask) + 0.5)),
|
|
b(value_type(c.b * double(base_mask) + 0.5)),
|
|
a(value_type(a_ * double(base_mask) + 0.5)) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba8(const self_type& c, unsigned a_) :
|
|
r(c.r), g(c.g), b(c.b), a(value_type(a_)) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba8(const rgba& c) :
|
|
r(value_type(c.r * double(base_mask) + 0.5)),
|
|
g(value_type(c.g * double(base_mask) + 0.5)),
|
|
b(value_type(c.b * double(base_mask) + 0.5)),
|
|
a(value_type(c.a * double(base_mask) + 0.5)) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
void clear()
|
|
{
|
|
r = g = b = a = 0;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const self_type& transparent()
|
|
{
|
|
a = 0;
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const self_type& opacity(double a_)
|
|
{
|
|
if(a_ < 0.0) a_ = 0.0;
|
|
if(a_ > 1.0) a_ = 1.0;
|
|
a = value_type(a_ * double(base_mask) + 0.5);
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
double opacity() const
|
|
{
|
|
return double(a) / double(base_mask);
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const self_type& premultiply()
|
|
{
|
|
if(a == base_mask) return *this;
|
|
if(a == 0)
|
|
{
|
|
r = g = b = 0;
|
|
return *this;
|
|
}
|
|
r = value_type((calc_type(r) * a) >> base_shift);
|
|
g = value_type((calc_type(g) * a) >> base_shift);
|
|
b = value_type((calc_type(b) * a) >> base_shift);
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const self_type& premultiply(unsigned a_)
|
|
{
|
|
if(a == base_mask && a_ >= base_mask) return *this;
|
|
if(a == 0 || a_ == 0)
|
|
{
|
|
r = g = b = a = 0;
|
|
return *this;
|
|
}
|
|
calc_type r_ = (calc_type(r) * a_) / a;
|
|
calc_type g_ = (calc_type(g) * a_) / a;
|
|
calc_type b_ = (calc_type(b) * a_) / a;
|
|
r = value_type((r_ > a_) ? a_ : r_);
|
|
g = value_type((g_ > a_) ? a_ : g_);
|
|
b = value_type((b_ > a_) ? a_ : b_);
|
|
a = value_type(a_);
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const self_type& demultiply()
|
|
{
|
|
if(a == base_mask) return *this;
|
|
if(a == 0)
|
|
{
|
|
r = g = b = 0;
|
|
return *this;
|
|
}
|
|
calc_type r_ = (calc_type(r) * base_mask) / a;
|
|
calc_type g_ = (calc_type(g) * base_mask) / a;
|
|
calc_type b_ = (calc_type(b) * base_mask) / a;
|
|
r = value_type((r_ > base_mask) ? base_mask : r_);
|
|
g = value_type((g_ > base_mask) ? base_mask : g_);
|
|
b = value_type((b_ > base_mask) ? base_mask : b_);
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
self_type gradient(const self_type& c, double k) const
|
|
{
|
|
self_type ret;
|
|
calc_type ik = calc_type(k * base_size);
|
|
ret.r = value_type(calc_type(r) + (((calc_type(c.r) - r) * ik) >> base_shift));
|
|
ret.g = value_type(calc_type(g) + (((calc_type(c.g) - g) * ik) >> base_shift));
|
|
ret.b = value_type(calc_type(b) + (((calc_type(c.b) - b) * ik) >> base_shift));
|
|
ret.a = value_type(calc_type(a) + (((calc_type(c.a) - a) * ik) >> base_shift));
|
|
return ret;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
static self_type no_color() { return self_type(0,0,0,0); }
|
|
|
|
//--------------------------------------------------------------------
|
|
static self_type from_wavelength(double wl, double gamma = 1.0)
|
|
{
|
|
return self_type(rgba::from_wavelength(wl, gamma));
|
|
}
|
|
};
|
|
|
|
|
|
//-------------------------------------------------------------rgba8_pre
|
|
inline rgba8 rgba8_pre(unsigned r, unsigned g, unsigned b,
|
|
unsigned a = rgba8::base_mask)
|
|
{
|
|
return rgba8(r,g,b,a).premultiply();
|
|
}
|
|
inline rgba8 rgba8_pre(const rgba8& c)
|
|
{
|
|
return rgba8(c).premultiply();
|
|
}
|
|
inline rgba8 rgba8_pre(const rgba8& c, unsigned a)
|
|
{
|
|
return rgba8(c,a).premultiply();
|
|
}
|
|
inline rgba8 rgba8_pre(const rgba& c)
|
|
{
|
|
return rgba8(c).premultiply();
|
|
}
|
|
inline rgba8 rgba8_pre(const rgba& c, double a)
|
|
{
|
|
return rgba8(c,a).premultiply();
|
|
}
|
|
|
|
|
|
//-----------------------------------------------------------rgb8_packed
|
|
inline rgba8 rgb8_packed(unsigned v)
|
|
{
|
|
return rgba8((v >> 16) & 0xFF, (v >> 8) & 0xFF, v & 0xFF);
|
|
}
|
|
|
|
//-----------------------------------------------------------bgr8_packed
|
|
inline rgba8 bgr8_packed(unsigned v)
|
|
{
|
|
return rgba8(v & 0xFF, (v >> 8) & 0xFF, (v >> 16) & 0xFF);
|
|
}
|
|
|
|
//----------------------------------------------------------argb8_packed
|
|
inline rgba8 argb8_packed(unsigned v)
|
|
{
|
|
return rgba8((v >> 16) & 0xFF, (v >> 8) & 0xFF, v & 0xFF, v >> 24);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//=================================================================rgba16
|
|
struct rgba16
|
|
{
|
|
typedef int16u value_type;
|
|
typedef int32u calc_type;
|
|
typedef int64 long_type;
|
|
enum base_scale_e
|
|
{
|
|
base_shift = 16,
|
|
base_size = 1 << base_shift,
|
|
base_mask = base_size - 1
|
|
};
|
|
typedef rgba16 self_type;
|
|
|
|
value_type r;
|
|
value_type g;
|
|
value_type b;
|
|
value_type a;
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba16() {}
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba16(unsigned r_, unsigned g_, unsigned b_, unsigned a_=base_mask) :
|
|
r(value_type(r_)),
|
|
g(value_type(g_)),
|
|
b(value_type(b_)),
|
|
a(value_type(a_)) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba16(const self_type& c, unsigned a_) :
|
|
r(c.r), g(c.g), b(c.b), a(value_type(a_)) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba16(const rgba& c) :
|
|
r(value_type(c.r * double(base_mask) + 0.5)),
|
|
g(value_type(c.g * double(base_mask) + 0.5)),
|
|
b(value_type(c.b * double(base_mask) + 0.5)),
|
|
a(value_type(c.a * double(base_mask) + 0.5)) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba16(const rgba& c, double a_) :
|
|
r(value_type(c.r * double(base_mask) + 0.5)),
|
|
g(value_type(c.g * double(base_mask) + 0.5)),
|
|
b(value_type(c.b * double(base_mask) + 0.5)),
|
|
a(value_type(a_ * double(base_mask) + 0.5)) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba16(const rgba8& c) :
|
|
r(value_type((value_type(c.r) << 8) | c.r)),
|
|
g(value_type((value_type(c.g) << 8) | c.g)),
|
|
b(value_type((value_type(c.b) << 8) | c.b)),
|
|
a(value_type((value_type(c.a) << 8) | c.a)) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
rgba16(const rgba8& c, unsigned a_) :
|
|
r(value_type((value_type(c.r) << 8) | c.r)),
|
|
g(value_type((value_type(c.g) << 8) | c.g)),
|
|
b(value_type((value_type(c.b) << 8) | c.b)),
|
|
a(value_type(( a_ << 8) | c.a)) {}
|
|
|
|
//--------------------------------------------------------------------
|
|
void clear()
|
|
{
|
|
r = g = b = a = 0;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const self_type& transparent()
|
|
{
|
|
a = 0;
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const self_type& opacity(double a_)
|
|
{
|
|
if(a_ < 0.0) a_ = 0.0;
|
|
if(a_ > 1.0) a_ = 1.0;
|
|
a = value_type(a_ * double(base_mask) + 0.5);
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
double opacity() const
|
|
{
|
|
return double(a) / double(base_mask);
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const self_type& premultiply()
|
|
{
|
|
if(a == base_mask) return *this;
|
|
if(a == 0)
|
|
{
|
|
r = g = b = 0;
|
|
return *this;
|
|
}
|
|
r = value_type((calc_type(r) * a) >> base_shift);
|
|
g = value_type((calc_type(g) * a) >> base_shift);
|
|
b = value_type((calc_type(b) * a) >> base_shift);
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const self_type& premultiply(unsigned a_)
|
|
{
|
|
if(a == base_mask && a_ >= base_mask) return *this;
|
|
if(a == 0 || a_ == 0)
|
|
{
|
|
r = g = b = a = 0;
|
|
return *this;
|
|
}
|
|
calc_type r_ = (calc_type(r) * a_) / a;
|
|
calc_type g_ = (calc_type(g) * a_) / a;
|
|
calc_type b_ = (calc_type(b) * a_) / a;
|
|
r = value_type((r_ > a_) ? a_ : r_);
|
|
g = value_type((g_ > a_) ? a_ : g_);
|
|
b = value_type((b_ > a_) ? a_ : b_);
|
|
a = value_type(a_);
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
const self_type& demultiply()
|
|
{
|
|
if(a == base_mask) return *this;
|
|
if(a == 0)
|
|
{
|
|
r = g = b = 0;
|
|
return *this;
|
|
}
|
|
calc_type r_ = (calc_type(r) * base_mask) / a;
|
|
calc_type g_ = (calc_type(g) * base_mask) / a;
|
|
calc_type b_ = (calc_type(b) * base_mask) / a;
|
|
r = value_type((r_ > base_mask) ? base_mask : r_);
|
|
g = value_type((g_ > base_mask) ? base_mask : g_);
|
|
b = value_type((b_ > base_mask) ? base_mask : b_);
|
|
return *this;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
self_type gradient(const self_type& c, double k) const
|
|
{
|
|
self_type ret;
|
|
calc_type ik = calc_type(k * base_size);
|
|
ret.r = value_type(calc_type(r) + (((calc_type(c.r) - r) * ik) >> base_shift));
|
|
ret.g = value_type(calc_type(g) + (((calc_type(c.g) - g) * ik) >> base_shift));
|
|
ret.b = value_type(calc_type(b) + (((calc_type(c.b) - b) * ik) >> base_shift));
|
|
ret.a = value_type(calc_type(a) + (((calc_type(c.a) - a) * ik) >> base_shift));
|
|
return ret;
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
static self_type no_color() { return self_type(0,0,0,0); }
|
|
|
|
//--------------------------------------------------------------------
|
|
static self_type from_wavelength(double wl, double gamma = 1.0)
|
|
{
|
|
return self_type(rgba::from_wavelength(wl, gamma));
|
|
}
|
|
};
|
|
|
|
|
|
|
|
//--------------------------------------------------------------rgba16_pre
|
|
inline rgba16 rgba16_pre(unsigned r, unsigned g, unsigned b,
|
|
unsigned a = rgba16::base_mask)
|
|
{
|
|
return rgba16(r,g,b,a).premultiply();
|
|
}
|
|
inline rgba16 rgba16_pre(const rgba16& c, unsigned a)
|
|
{
|
|
return rgba16(c,a).premultiply();
|
|
}
|
|
inline rgba16 rgba16_pre(const rgba& c)
|
|
{
|
|
return rgba16(c).premultiply();
|
|
}
|
|
inline rgba16 rgba16_pre(const rgba& c, double a)
|
|
{
|
|
return rgba16(c,a).premultiply();
|
|
}
|
|
inline rgba16 rgba16_pre(const rgba8& c)
|
|
{
|
|
return rgba16(c).premultiply();
|
|
}
|
|
inline rgba16 rgba16_pre(const rgba8& c, unsigned a)
|
|
{
|
|
return rgba16(c,a).premultiply();
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|