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agg/include/agg_pixfmt_rgba.h

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//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.4
// 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.
//
//----------------------------------------------------------------------------
// Contact: mcseem@antigrain.com
// mcseemagg@yahoo.com
// http://www.antigrain.com
//----------------------------------------------------------------------------
//
// 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.
//
//----------------------------------------------------------------------------
#ifndef AGG_PIXFMT_RGBA_INCLUDED
#define AGG_PIXFMT_RGBA_INCLUDED
#include <cstring>
#include <cmath>
#include "agg_pixfmt_base.h"
#include "agg_rendering_buffer.h"
namespace agg
{
template<class T> inline T sd_min(T a, T b) { return (a < b) ? a : b; }
template<class T> inline T sd_max(T a, T b) { return (a > b) ? a : b; }
inline rgba & clip(rgba & c)
{
if (c.a > 1) c.a = 1; else if (c.a < 0) c.a = 0;
if (c.r > c.a) c.r = c.a; else if (c.r < 0) c.r = 0;
if (c.g > c.a) c.g = c.a; else if (c.g < 0) c.g = 0;
if (c.b > c.a) c.b = c.a; else if (c.b < 0) c.b = 0;
return c;
}
//=========================================================multiplier_rgba
template<class ColorT, class Order>
struct multiplier_rgba
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
//--------------------------------------------------------------------
static AGG_INLINE void premultiply(value_type* p)
{
value_type a = p[Order::A];
p[Order::R] = color_type::multiply(p[Order::R], a);
p[Order::G] = color_type::multiply(p[Order::G], a);
p[Order::B] = color_type::multiply(p[Order::B], a);
}
//--------------------------------------------------------------------
static AGG_INLINE void demultiply(value_type* p)
{
value_type a = p[Order::A];
p[Order::R] = color_type::demultiply(p[Order::R], a);
p[Order::G] = color_type::demultiply(p[Order::G], a);
p[Order::B] = color_type::demultiply(p[Order::B], a);
}
};
//=====================================================apply_gamma_dir_rgba
template<class ColorT, class Order, class GammaLut>
class apply_gamma_dir_rgba
{
public:
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
apply_gamma_dir_rgba(const GammaLut& gamma) : m_gamma(gamma) {}
AGG_INLINE void operator () (value_type* p)
{
p[Order::R] = m_gamma.dir(p[Order::R]);
p[Order::G] = m_gamma.dir(p[Order::G]);
p[Order::B] = m_gamma.dir(p[Order::B]);
}
private:
const GammaLut& m_gamma;
};
//=====================================================apply_gamma_inv_rgba
template<class ColorT, class Order, class GammaLut> class apply_gamma_inv_rgba
{
public:
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
apply_gamma_inv_rgba(const GammaLut& gamma) : m_gamma(gamma) {}
AGG_INLINE void operator () (value_type* p)
{
p[Order::R] = m_gamma.inv(p[Order::R]);
p[Order::G] = m_gamma.inv(p[Order::G]);
p[Order::B] = m_gamma.inv(p[Order::B]);
}
private:
const GammaLut& m_gamma;
};
template<class ColorT, class Order>
struct conv_rgba_pre
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
//--------------------------------------------------------------------
static AGG_INLINE void set_plain_color(value_type* p, color_type c)
{
c.premultiply();
p[Order::R] = c.r;
p[Order::G] = c.g;
p[Order::B] = c.b;
p[Order::A] = c.a;
}
//--------------------------------------------------------------------
static AGG_INLINE color_type get_plain_color(const value_type* p)
{
return color_type(
p[Order::R],
p[Order::G],
p[Order::B],
p[Order::A]).demultiply();
}
};
template<class ColorT, class Order>
struct conv_rgba_plain
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
//--------------------------------------------------------------------
static AGG_INLINE void set_plain_color(value_type* p, color_type c)
{
p[Order::R] = c.r;
p[Order::G] = c.g;
p[Order::B] = c.b;
p[Order::A] = c.a;
}
//--------------------------------------------------------------------
static AGG_INLINE color_type get_plain_color(const value_type* p)
{
return color_type(
p[Order::R],
p[Order::G],
p[Order::B],
p[Order::A]);
}
};
//=============================================================blender_rgba
// Blends "plain" (i.e. non-premultiplied) colors into a premultiplied buffer.
template<class ColorT, class Order>
struct blender_rgba : conv_rgba_pre<ColorT, Order>
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
// Blend pixels using the non-premultiplied form of Alvy-Ray Smith's
// compositing function. Since the render buffer is in fact premultiplied
// we omit the initial premultiplication and final demultiplication.
//--------------------------------------------------------------------
static AGG_INLINE void blend_pix(value_type* p,
value_type cr, value_type cg, value_type cb, value_type alpha, cover_type cover)
{
blend_pix(p, cr, cg, cb, color_type::mult_cover(alpha, cover));
}
//--------------------------------------------------------------------
static AGG_INLINE void blend_pix(value_type* p,
value_type cr, value_type cg, value_type cb, value_type alpha)
{
p[Order::R] = color_type::lerp(p[Order::R], cr, alpha);
p[Order::G] = color_type::lerp(p[Order::G], cg, alpha);
p[Order::B] = color_type::lerp(p[Order::B], cb, alpha);
p[Order::A] = color_type::prelerp(p[Order::A], alpha, alpha);
}
};
//========================================================blender_rgba_pre
// Blends premultiplied colors into a premultiplied buffer.
template<class ColorT, class Order>
struct blender_rgba_pre : conv_rgba_pre<ColorT, Order>
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
// Blend pixels using the premultiplied form of Alvy-Ray Smith's
// compositing function.
//--------------------------------------------------------------------
static AGG_INLINE void blend_pix(value_type* p,
value_type cr, value_type cg, value_type cb, value_type alpha, cover_type cover)
{
blend_pix(p,
color_type::mult_cover(cr, cover),
color_type::mult_cover(cg, cover),
color_type::mult_cover(cb, cover),
color_type::mult_cover(alpha, cover));
}
//--------------------------------------------------------------------
static AGG_INLINE void blend_pix(value_type* p,
value_type cr, value_type cg, value_type cb, value_type alpha)
{
p[Order::R] = color_type::prelerp(p[Order::R], cr, alpha);
p[Order::G] = color_type::prelerp(p[Order::G], cg, alpha);
p[Order::B] = color_type::prelerp(p[Order::B], cb, alpha);
p[Order::A] = color_type::prelerp(p[Order::A], alpha, alpha);
}
};
//======================================================blender_rgba_plain
// Blends "plain" (non-premultiplied) colors into a plain (non-premultiplied) buffer.
template<class ColorT, class Order>
struct blender_rgba_plain : conv_rgba_plain<ColorT, Order>
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
// Blend pixels using the non-premultiplied form of Alvy-Ray Smith's
// compositing function.
//--------------------------------------------------------------------
static AGG_INLINE void blend_pix(value_type* p,
value_type cr, value_type cg, value_type cb, value_type alpha, cover_type cover)
{
blend_pix(p, cr, cg, cb, color_type::mult_cover(alpha, cover));
}
//--------------------------------------------------------------------
static AGG_INLINE void blend_pix(value_type* p,
value_type cr, value_type cg, value_type cb, value_type alpha)
{
if (alpha > color_type::empty_value())
{
calc_type a = p[Order::A];
calc_type r = color_type::multiply(p[Order::R], a);
calc_type g = color_type::multiply(p[Order::G], a);
calc_type b = color_type::multiply(p[Order::B], a);
p[Order::R] = color_type::lerp(r, cr, alpha);
p[Order::G] = color_type::lerp(g, cg, alpha);
p[Order::B] = color_type::lerp(b, cb, alpha);
p[Order::A] = color_type::prelerp(a, alpha, alpha);
multiplier_rgba<ColorT, Order>::demultiply(p);
}
}
};
// SVG compositing operations.
// For specifications, see http://www.w3.org/TR/SVGCompositing/
//=========================================================comp_op_rgba_clear
template<class ColorT, class Order>
struct comp_op_rgba_clear : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = 0
// Da' = 0
static AGG_INLINE void blend_pix(value_type* p,
value_type, value_type, value_type, value_type, cover_type cover)
{
if (cover >= cover_full)
{
p[0] = p[1] = p[2] = p[3] = color_type::empty_value();
}
else if (cover > cover_none)
{
set(p, get(p, cover_full - cover));
}
}
};
//===========================================================comp_op_rgba_src
template<class ColorT, class Order>
struct comp_op_rgba_src : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Sca
// Da' = Sa
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
if (cover >= cover_full)
{
set(p, r, g, b, a);
}
else
{
rgba s = get(r, g, b, a, cover);
rgba d = get(p, cover_full - cover);
d.r += s.r;
d.g += s.g;
d.b += s.b;
d.a += s.a;
set(p, d);
}
}
};
//===========================================================comp_op_rgba_dst
template<class ColorT, class Order>
struct comp_op_rgba_dst : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
// Dca' = Dca.Sa + Dca.(1 - Sa) = Dca
// Da' = Da.Sa + Da.(1 - Sa) = Da
static AGG_INLINE void blend_pix(value_type*,
value_type, value_type, value_type, value_type, cover_type)
{
// Well, that was easy!
}
};
//======================================================comp_op_rgba_src_over
template<class ColorT, class Order>
struct comp_op_rgba_src_over : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Sca + Dca.(1 - Sa) = Dca + Sca - Dca.Sa
// Da' = Sa + Da - Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
#if 1
blender_rgba_pre<ColorT, Order>::blend_pix(p, r, g, b, a, cover);
#else
rgba s = get(r, g, b, a, cover);
rgba d = get(p);
d.r += s.r - d.r * s.a;
d.g += s.g - d.g * s.a;
d.b += s.b - d.b * s.a;
d.a += s.a - d.a * s.a;
set(p, d);
#endif
}
};
//======================================================comp_op_rgba_dst_over
template<class ColorT, class Order>
struct comp_op_rgba_dst_over : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Dca + Sca.(1 - Da)
// Da' = Sa + Da - Sa.Da = Da + Sa.(1 - Da)
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
rgba d = get(p);
double d1a = 1 - d.a;
d.r += s.r * d1a;
d.g += s.g * d1a;
d.b += s.b * d1a;
d.a += s.a * d1a;
set(p, d);
}
};
//======================================================comp_op_rgba_src_in
template<class ColorT, class Order>
struct comp_op_rgba_src_in : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Sca.Da
// Da' = Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
double da = ColorT::to_double(p[Order::A]);
if (da > 0)
{
rgba s = get(r, g, b, a, cover);
rgba d = get(p, cover_full - cover);
d.r += s.r * da;
d.g += s.g * da;
d.b += s.b * da;
d.a += s.a * da;
set(p, d);
}
}
};
//======================================================comp_op_rgba_dst_in
template<class ColorT, class Order>
struct comp_op_rgba_dst_in : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Dca.Sa
// Da' = Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
value_type, value_type, value_type, value_type a, cover_type cover)
{
double sa = ColorT::to_double(a);
rgba d = get(p, cover_full - cover);
rgba d2 = get(p, cover);
d.r += d2.r * sa;
d.g += d2.g * sa;
d.b += d2.b * sa;
d.a += d2.a * sa;
set(p, d);
}
};
//======================================================comp_op_rgba_src_out
template<class ColorT, class Order>
struct comp_op_rgba_src_out : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Sca.(1 - Da)
// Da' = Sa.(1 - Da)
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
rgba d = get(p, cover_full - cover);
double d1a = 1 - ColorT::to_double(p[Order::A]);
d.r += s.r * d1a;
d.g += s.g * d1a;
d.b += s.b * d1a;
d.a += s.a * d1a;
set(p, d);
}
};
//======================================================comp_op_rgba_dst_out
template<class ColorT, class Order>
struct comp_op_rgba_dst_out : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Dca.(1 - Sa)
// Da' = Da.(1 - Sa)
static AGG_INLINE void blend_pix(value_type* p,
value_type, value_type, value_type, value_type a, cover_type cover)
{
rgba d = get(p, cover_full - cover);
rgba dc = get(p, cover);
double s1a = 1 - ColorT::to_double(a);
d.r += dc.r * s1a;
d.g += dc.g * s1a;
d.b += dc.b * s1a;
d.a += dc.a * s1a;
set(p, d);
}
};
//=====================================================comp_op_rgba_src_atop
template<class ColorT, class Order>
struct comp_op_rgba_src_atop : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Sca.Da + Dca.(1 - Sa)
// Da' = Da
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
rgba d = get(p);
double s1a = 1 - s.a;
d.r = s.r * d.a + d.r * s1a;
d.g = s.g * d.a + d.g * s1a;
d.b = s.b * d.a + d.g * s1a;
set(p, d);
}
};
//=====================================================comp_op_rgba_dst_atop
template<class ColorT, class Order>
struct comp_op_rgba_dst_atop : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Dca.Sa + Sca.(1 - Da)
// Da' = Sa
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba sc = get(r, g, b, a, cover);
rgba dc = get(p, cover);
rgba d = get(p, cover_full - cover);
double sa = ColorT::to_double(a);
double d1a = 1 - ColorT::to_double(p[Order::A]);
d.r += dc.r * sa + sc.r * d1a;
d.g += dc.g * sa + sc.g * d1a;
d.b += dc.b * sa + sc.b * d1a;
d.a += sc.a;
set(p, d);
}
};
//=========================================================comp_op_rgba_xor
template<class ColorT, class Order>
struct comp_op_rgba_xor : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Sca.(1 - Da) + Dca.(1 - Sa)
// Da' = Sa + Da - 2.Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
rgba d = get(p);
double s1a = 1 - s.a;
double d1a = 1 - ColorT::to_double(p[Order::A]);
d.r = s.r * d1a + d.r * s1a;
d.g = s.g * d1a + d.g * s1a;
d.b = s.b * d1a + d.b * s1a;
d.a = s.a + d.a - 2 * s.a * d.a;
set(p, d);
}
};
//=========================================================comp_op_rgba_plus
template<class ColorT, class Order>
struct comp_op_rgba_plus : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Sca + Dca
// Da' = Sa + Da
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
d.a = sd_min(d.a + s.a, 1.0);
d.r = sd_min(d.r + s.r, d.a);
d.g = sd_min(d.g + s.g, d.a);
d.b = sd_min(d.b + s.b, d.a);
set(p, clip(d));
}
}
};
//========================================================comp_op_rgba_minus
// Note: not included in SVG spec.
template<class ColorT, class Order>
struct comp_op_rgba_minus : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Dca - Sca
// Da' = 1 - (1 - Sa).(1 - Da) = Da + Sa - Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
d.a += s.a - s.a * d.a;
d.r = sd_max(d.r - s.r, 0.0);
d.g = sd_max(d.g - s.g, 0.0);
d.b = sd_max(d.b - s.b, 0.0);
set(p, clip(d));
}
}
};
//=====================================================comp_op_rgba_multiply
template<class ColorT, class Order>
struct comp_op_rgba_multiply : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Sca.Dca + Sca.(1 - Da) + Dca.(1 - Sa)
// Da' = Sa + Da - Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
double s1a = 1 - s.a;
double d1a = 1 - d.a;
d.r = s.r * d.r + s.r * d1a + d.r * s1a;
d.g = s.g * d.g + s.g * d1a + d.g * s1a;
d.b = s.b * d.b + s.b * d1a + d.b * s1a;
d.a += s.a - s.a * d.a;
set(p, clip(d));
}
}
};
//=====================================================comp_op_rgba_screen
template<class ColorT, class Order>
struct comp_op_rgba_screen : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Sca + Dca - Sca.Dca
// Da' = Sa + Da - Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
d.r += s.r - s.r * d.r;
d.g += s.g - s.g * d.g;
d.b += s.b - s.b * d.b;
d.a += s.a - s.a * d.a;
set(p, clip(d));
}
}
};
//=====================================================comp_op_rgba_overlay
template<class ColorT, class Order>
struct comp_op_rgba_overlay : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// if 2.Dca <= Da
// Dca' = 2.Sca.Dca + Sca.(1 - Da) + Dca.(1 - Sa)
// otherwise
// Dca' = Sa.Da - 2.(Da - Dca).(Sa - Sca) + Sca.(1 - Da) + Dca.(1 - Sa)
//
// Da' = Sa + Da - Sa.Da
static AGG_INLINE double calc(double dca, double sca, double da, double sa, double sada, double d1a, double s1a)
{
return (2 * dca <= da) ?
2 * sca * dca + sca * d1a + dca * s1a :
sada - 2 * (da - dca) * (sa - sca) + sca * d1a + dca * s1a;
}
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
double d1a = 1 - d.a;
double s1a = 1 - s.a;
double sada = s.a * d.a;
d.r = calc(d.r, s.r, d.a, s.a, sada, d1a, s1a);
d.g = calc(d.g, s.g, d.a, s.a, sada, d1a, s1a);
d.b = calc(d.b, s.b, d.a, s.a, sada, d1a, s1a);
d.a += s.a - s.a * d.a;
set(p, clip(d));
}
}
};
//=====================================================comp_op_rgba_darken
template<class ColorT, class Order>
struct comp_op_rgba_darken : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = min(Sca.Da, Dca.Sa) + Sca.(1 - Da) + Dca.(1 - Sa)
// Da' = Sa + Da - Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
double d1a = 1 - d.a;
double s1a = 1 - s.a;
d.r = sd_min(s.r * d.a, d.r * s.a) + s.r * d1a + d.r * s1a;
d.g = sd_min(s.g * d.a, d.g * s.a) + s.g * d1a + d.g * s1a;
d.b = sd_min(s.b * d.a, d.b * s.a) + s.b * d1a + d.b * s1a;
d.a += s.a - s.a * d.a;
set(p, clip(d));
}
}
};
//=====================================================comp_op_rgba_lighten
template<class ColorT, class Order>
struct comp_op_rgba_lighten : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = max(Sca.Da, Dca.Sa) + Sca.(1 - Da) + Dca.(1 - Sa)
// Da' = Sa + Da - Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
double d1a = 1 - d.a;
double s1a = 1 - s.a;
d.r = sd_max(s.r * d.a, d.r * s.a) + s.r * d1a + d.r * s1a;
d.g = sd_max(s.g * d.a, d.g * s.a) + s.g * d1a + d.g * s1a;
d.b = sd_max(s.b * d.a, d.b * s.a) + s.b * d1a + d.b * s1a;
d.a += s.a - s.a * d.a;
set(p, clip(d));
}
}
};
//=====================================================comp_op_rgba_color_dodge
template<class ColorT, class Order>
struct comp_op_rgba_color_dodge : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// if Sca == Sa and Dca == 0
// Dca' = Sca.(1 - Da) + Dca.(1 - Sa) = Sca.(1 - Da)
// otherwise if Sca == Sa
// Dca' = Sa.Da + Sca.(1 - Da) + Dca.(1 - Sa)
// otherwise if Sca < Sa
// Dca' = Sa.Da.min(1, Dca/Da.Sa/(Sa - Sca)) + Sca.(1 - Da) + Dca.(1 - Sa)
//
// Da' = Sa + Da - Sa.Da
static AGG_INLINE double calc(double dca, double sca, double da, double sa, double sada, double d1a, double s1a)
{
if (sca < sa) return sada * sd_min(1.0, (dca / da) * sa / (sa - sca)) + sca * d1a + dca * s1a;
if (dca > 0) return sada + sca * d1a + dca * s1a;
return sca * d1a;
}
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
if (d.a > 0)
{
double sada = s.a * d.a;
double s1a = 1 - s.a;
double d1a = 1 - d.a;
d.r = calc(d.r, s.r, d.a, s.a, sada, d1a, s1a);
d.g = calc(d.g, s.g, d.a, s.a, sada, d1a, s1a);
d.b = calc(d.b, s.b, d.a, s.a, sada, d1a, s1a);
d.a += s.a - s.a * d.a;
set(p, clip(d));
}
else set(p, s);
}
}
};
//=====================================================comp_op_rgba_color_burn
template<class ColorT, class Order>
struct comp_op_rgba_color_burn : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// if Sca == 0 and Dca == Da
// Dca' = Sa.Da + Dca.(1 - Sa)
// otherwise if Sca == 0
// Dca' = Dca.(1 - Sa)
// otherwise if Sca > 0
// Dca' = Sa.Da.(1 - min(1, (1 - Dca/Da).Sa/Sca)) + Sca.(1 - Da) + Dca.(1 - Sa)
static AGG_INLINE double calc(double dca, double sca, double da, double sa, double sada, double d1a, double s1a)
{
if (sca > 0) return sada * (1 - sd_min(1.0, (1 - dca / da) * sa / sca)) + sca * d1a + dca * s1a;
if (dca > da) return sada + dca * s1a;
return dca * s1a;
}
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
if (d.a > 0)
{
double sada = s.a * d.a;
double s1a = 1 - s.a;
double d1a = 1 - d.a;
d.r = calc(d.r, s.r, d.a, s.a, sada, d1a, s1a);
d.g = calc(d.g, s.g, d.a, s.a, sada, d1a, s1a);
d.b = calc(d.b, s.b, d.a, s.a, sada, d1a, s1a);
d.a += s.a - sada;
set(p, clip(d));
}
else set(p, s);
}
}
};
//=====================================================comp_op_rgba_hard_light
template<class ColorT, class Order>
struct comp_op_rgba_hard_light : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// if 2.Sca < Sa
// Dca' = 2.Sca.Dca + Sca.(1 - Da) + Dca.(1 - Sa)
// otherwise
// Dca' = Sa.Da - 2.(Da - Dca).(Sa - Sca) + Sca.(1 - Da) + Dca.(1 - Sa)
//
// Da' = Sa + Da - Sa.Da
static AGG_INLINE double calc(double dca, double sca, double da, double sa, double sada, double d1a, double s1a)
{
return (2 * sca < sa) ?
2 * sca * dca + sca * d1a + dca * s1a :
sada - 2 * (da - dca) * (sa - sca) + sca * d1a + dca * s1a;
}
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
double d1a = 1 - d.a;
double s1a = 1 - s.a;
double sada = s.a * d.a;
d.r = calc(d.r, s.r, d.a, s.a, sada, d1a, s1a);
d.g = calc(d.g, s.g, d.a, s.a, sada, d1a, s1a);
d.b = calc(d.b, s.b, d.a, s.a, sada, d1a, s1a);
d.a += s.a - sada;
set(p, clip(d));
}
}
};
//=====================================================comp_op_rgba_soft_light
template<class ColorT, class Order>
struct comp_op_rgba_soft_light : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// if 2.Sca <= Sa
// Dca' = Dca.Sa - (Sa.Da - 2.Sca.Da).Dca.Sa.(Sa.Da - Dca.Sa) + Sca.(1 - Da) + Dca.(1 - Sa)
// otherwise if 2.Sca > Sa and 4.Dca <= Da
// Dca' = Dca.Sa + (2.Sca.Da - Sa.Da).((((16.Dsa.Sa - 12).Dsa.Sa + 4).Dsa.Da) - Dsa.Da) + Sca.(1 - Da) + Dca.(1 - Sa)
// otherwise if 2.Sca > Sa and 4.Dca > Da
// Dca' = Dca.Sa + (2.Sca.Da - Sa.Da).((Dca.Sa)^0.5 - Dca.Sa) + Sca.(1 - Da) + Dca.(1 - Sa)
//
// Da' = Sa + Da - Sa.Da
static AGG_INLINE double calc(double dca, double sca, double da, double sa, double sada, double d1a, double s1a)
{
double dcasa = dca * sa;
if (2 * sca <= sa) return dcasa - (sada - 2 * sca * da) * dcasa * (sada - dcasa) + sca * d1a + dca * s1a;
if (4 * dca <= da) return dcasa + (2 * sca * da - sada) * ((((16 * dcasa - 12) * dcasa + 4) * dca * da) - dca * da) + sca * d1a + dca * s1a;
return dcasa + (2 * sca * da - sada) * (std::sqrt(dcasa) - dcasa) + sca * d1a + dca * s1a;
}
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
if (d.a > 0)
{
double sada = s.a * d.a;
double s1a = 1 - s.a;
double d1a = 1 - d.a;
d.r = calc(d.r, s.r, d.a, s.a, sada, d1a, s1a);
d.g = calc(d.g, s.g, d.a, s.a, sada, d1a, s1a);
d.b = calc(d.b, s.b, d.a, s.a, sada, d1a, s1a);
d.a += s.a - sada;
set(p, clip(d));
}
else set(p, s);
}
}
};
//=====================================================comp_op_rgba_difference
template<class ColorT, class Order>
struct comp_op_rgba_difference : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = Sca + Dca - 2.min(Sca.Da, Dca.Sa)
// Da' = Sa + Da - Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
d.r += s.r - 2 * sd_min(s.r * d.a, d.r * s.a);
d.g += s.g - 2 * sd_min(s.g * d.a, d.g * s.a);
d.b += s.b - 2 * sd_min(s.b * d.a, d.b * s.a);
d.a += s.a - s.a * d.a;
set(p, clip(d));
}
}
};
//=====================================================comp_op_rgba_exclusion
template<class ColorT, class Order>
struct comp_op_rgba_exclusion : blender_base<ColorT, Order>
{
typedef ColorT color_type;
typedef typename color_type::value_type value_type;
using blender_base<ColorT, Order>::get;
using blender_base<ColorT, Order>::set;
// Dca' = (Sca.Da + Dca.Sa - 2.Sca.Dca) + Sca.(1 - Da) + Dca.(1 - Sa)
// Da' = Sa + Da - Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
rgba s = get(r, g, b, a, cover);
if (s.a > 0)
{
rgba d = get(p);
double d1a = 1 - d.a;
double s1a = 1 - s.a;
d.r = (s.r * d.a + d.r * s.a - 2 * s.r * d.r) + s.r * d1a + d.r * s1a;
d.g = (s.g * d.a + d.g * s.a - 2 * s.g * d.g) + s.g * d1a + d.g * s1a;
d.b = (s.b * d.a + d.b * s.a - 2 * s.b * d.b) + s.b * d1a + d.b * s1a;
d.a += s.a - s.a * d.a;
set(p, clip(d));
}
}
};
#if 0
//=====================================================comp_op_rgba_contrast
template<class ColorT, class Order> struct comp_op_rgba_contrast
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
enum base_scale_e
{
base_shift = color_type::base_shift,
base_mask = color_type::base_mask
};
static AGG_INLINE void blend_pix(value_type* p,
unsigned sr, unsigned sg, unsigned sb,
unsigned sa, unsigned cover)
{
if (cover < 255)
{
sr = (sr * cover + 255) >> 8;
sg = (sg * cover + 255) >> 8;
sb = (sb * cover + 255) >> 8;
sa = (sa * cover + 255) >> 8;
}
long_type dr = p[Order::R];
long_type dg = p[Order::G];
long_type db = p[Order::B];
int da = p[Order::A];
long_type d2a = da >> 1;
unsigned s2a = sa >> 1;
int r = (int)((((dr - d2a) * int((sr - s2a)*2 + base_mask)) >> base_shift) + d2a);
int g = (int)((((dg - d2a) * int((sg - s2a)*2 + base_mask)) >> base_shift) + d2a);
int b = (int)((((db - d2a) * int((sb - s2a)*2 + base_mask)) >> base_shift) + d2a);
r = (r < 0) ? 0 : r;
g = (g < 0) ? 0 : g;
b = (b < 0) ? 0 : b;
p[Order::R] = (value_type)((r > da) ? da : r);
p[Order::G] = (value_type)((g > da) ? da : g);
p[Order::B] = (value_type)((b > da) ? da : b);
}
};
//=====================================================comp_op_rgba_invert
template<class ColorT, class Order> struct comp_op_rgba_invert
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
enum base_scale_e
{
base_shift = color_type::base_shift,
base_mask = color_type::base_mask
};
// Dca' = (Da - Dca) * Sa + Dca.(1 - Sa)
// Da' = Sa + Da - Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
unsigned sr, unsigned sg, unsigned sb,
unsigned sa, unsigned cover)
{
sa = (sa * cover + 255) >> 8;
if (sa)
{
calc_type da = p[Order::A];
calc_type dr = ((da - p[Order::R]) * sa + base_mask) >> base_shift;
calc_type dg = ((da - p[Order::G]) * sa + base_mask) >> base_shift;
calc_type db = ((da - p[Order::B]) * sa + base_mask) >> base_shift;
calc_type s1a = base_mask - sa;
p[Order::R] = (value_type)(dr + ((p[Order::R] * s1a + base_mask) >> base_shift));
p[Order::G] = (value_type)(dg + ((p[Order::G] * s1a + base_mask) >> base_shift));
p[Order::B] = (value_type)(db + ((p[Order::B] * s1a + base_mask) >> base_shift));
p[Order::A] = (value_type)(sa + da - ((sa * da + base_mask) >> base_shift));
}
}
};
//=================================================comp_op_rgba_invert_rgb
template<class ColorT, class Order> struct comp_op_rgba_invert_rgb
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
enum base_scale_e
{
base_shift = color_type::base_shift,
base_mask = color_type::base_mask
};
// Dca' = (Da - Dca) * Sca + Dca.(1 - Sa)
// Da' = Sa + Da - Sa.Da
static AGG_INLINE void blend_pix(value_type* p,
unsigned sr, unsigned sg, unsigned sb,
unsigned sa, unsigned cover)
{
if (cover < 255)
{
sr = (sr * cover + 255) >> 8;
sg = (sg * cover + 255) >> 8;
sb = (sb * cover + 255) >> 8;
sa = (sa * cover + 255) >> 8;
}
if (sa)
{
calc_type da = p[Order::A];
calc_type dr = ((da - p[Order::R]) * sr + base_mask) >> base_shift;
calc_type dg = ((da - p[Order::G]) * sg + base_mask) >> base_shift;
calc_type db = ((da - p[Order::B]) * sb + base_mask) >> base_shift;
calc_type s1a = base_mask - sa;
p[Order::R] = (value_type)(dr + ((p[Order::R] * s1a + base_mask) >> base_shift));
p[Order::G] = (value_type)(dg + ((p[Order::G] * s1a + base_mask) >> base_shift));
p[Order::B] = (value_type)(db + ((p[Order::B] * s1a + base_mask) >> base_shift));
p[Order::A] = (value_type)(sa + da - ((sa * da + base_mask) >> base_shift));
}
}
};
#endif
//======================================================comp_op_table_rgba
template<class ColorT, class Order> struct comp_op_table_rgba
{
typedef typename ColorT::value_type value_type;
typedef typename ColorT::calc_type calc_type;
typedef void (*comp_op_func_type)(value_type* p,
value_type cr,
value_type cg,
value_type cb,
value_type ca,
cover_type cover);
static comp_op_func_type g_comp_op_func[];
};
//==========================================================g_comp_op_func
template<class ColorT, class Order>
typename comp_op_table_rgba<ColorT, Order>::comp_op_func_type
comp_op_table_rgba<ColorT, Order>::g_comp_op_func[] =
{
comp_op_rgba_clear <ColorT,Order>::blend_pix,
comp_op_rgba_src <ColorT,Order>::blend_pix,
comp_op_rgba_dst <ColorT,Order>::blend_pix,
comp_op_rgba_src_over <ColorT,Order>::blend_pix,
comp_op_rgba_dst_over <ColorT,Order>::blend_pix,
comp_op_rgba_src_in <ColorT,Order>::blend_pix,
comp_op_rgba_dst_in <ColorT,Order>::blend_pix,
comp_op_rgba_src_out <ColorT,Order>::blend_pix,
comp_op_rgba_dst_out <ColorT,Order>::blend_pix,
comp_op_rgba_src_atop <ColorT,Order>::blend_pix,
comp_op_rgba_dst_atop <ColorT,Order>::blend_pix,
comp_op_rgba_xor <ColorT,Order>::blend_pix,
comp_op_rgba_plus <ColorT,Order>::blend_pix,
//comp_op_rgba_minus <ColorT,Order>::blend_pix,
comp_op_rgba_multiply <ColorT,Order>::blend_pix,
comp_op_rgba_screen <ColorT,Order>::blend_pix,
comp_op_rgba_overlay <ColorT,Order>::blend_pix,
comp_op_rgba_darken <ColorT,Order>::blend_pix,
comp_op_rgba_lighten <ColorT,Order>::blend_pix,
comp_op_rgba_color_dodge<ColorT,Order>::blend_pix,
comp_op_rgba_color_burn <ColorT,Order>::blend_pix,
comp_op_rgba_hard_light <ColorT,Order>::blend_pix,
comp_op_rgba_soft_light <ColorT,Order>::blend_pix,
comp_op_rgba_difference <ColorT,Order>::blend_pix,
comp_op_rgba_exclusion <ColorT,Order>::blend_pix,
//comp_op_rgba_contrast <ColorT,Order>::blend_pix,
//comp_op_rgba_invert <ColorT,Order>::blend_pix,
//comp_op_rgba_invert_rgb <ColorT,Order>::blend_pix,
0
};
//==============================================================comp_op_e
enum comp_op_e
{
comp_op_clear, //----comp_op_clear
comp_op_src, //----comp_op_src
comp_op_dst, //----comp_op_dst
comp_op_src_over, //----comp_op_src_over
comp_op_dst_over, //----comp_op_dst_over
comp_op_src_in, //----comp_op_src_in
comp_op_dst_in, //----comp_op_dst_in
comp_op_src_out, //----comp_op_src_out
comp_op_dst_out, //----comp_op_dst_out
comp_op_src_atop, //----comp_op_src_atop
comp_op_dst_atop, //----comp_op_dst_atop
comp_op_xor, //----comp_op_xor
comp_op_plus, //----comp_op_plus
//comp_op_minus, //----comp_op_minus
comp_op_multiply, //----comp_op_multiply
comp_op_screen, //----comp_op_screen
comp_op_overlay, //----comp_op_overlay
comp_op_darken, //----comp_op_darken
comp_op_lighten, //----comp_op_lighten
comp_op_color_dodge, //----comp_op_color_dodge
comp_op_color_burn, //----comp_op_color_burn
comp_op_hard_light, //----comp_op_hard_light
comp_op_soft_light, //----comp_op_soft_light
comp_op_difference, //----comp_op_difference
comp_op_exclusion, //----comp_op_exclusion
//comp_op_contrast, //----comp_op_contrast
//comp_op_invert, //----comp_op_invert
//comp_op_invert_rgb, //----comp_op_invert_rgb
end_of_comp_op_e
};
//====================================================comp_op_adaptor_rgba
template<class ColorT, class Order>
struct comp_op_adaptor_rgba
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
static AGG_INLINE void blend_pix(unsigned op, value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
comp_op_table_rgba<ColorT, Order>::g_comp_op_func[op](p,
color_type::multiply(r, a),
color_type::multiply(g, a),
color_type::multiply(b, a),
a, cover);
}
};
//=========================================comp_op_adaptor_clip_to_dst_rgba
template<class ColorT, class Order>
struct comp_op_adaptor_clip_to_dst_rgba
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
static AGG_INLINE void blend_pix(unsigned op, value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
r = color_type::multiply(r, a);
g = color_type::multiply(g, a);
b = color_type::multiply(b, a);
value_type da = p[Order::A];
comp_op_table_rgba<ColorT, Order>::g_comp_op_func[op](p,
color_type::multiply(r, da),
color_type::multiply(g, da),
color_type::multiply(b, da),
color_type::multiply(a, da), cover);
}
};
//================================================comp_op_adaptor_rgba_pre
template<class ColorT, class Order>
struct comp_op_adaptor_rgba_pre
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
static AGG_INLINE void blend_pix(unsigned op, value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
comp_op_table_rgba<ColorT, Order>::g_comp_op_func[op](p, r, g, b, a, cover);
}
};
//=====================================comp_op_adaptor_clip_to_dst_rgba_pre
template<class ColorT, class Order>
struct comp_op_adaptor_clip_to_dst_rgba_pre
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
static AGG_INLINE void blend_pix(unsigned op, value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
value_type da = p[Order::A];
comp_op_table_rgba<ColorT, Order>::g_comp_op_func[op](p,
color_type::multiply(r, da),
color_type::multiply(g, da),
color_type::multiply(b, da),
color_type::multiply(a, da), cover);
}
};
//====================================================comp_op_adaptor_rgba_plain
template<class ColorT, class Order>
struct comp_op_adaptor_rgba_plain
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
static AGG_INLINE void blend_pix(unsigned op, value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
multiplier_rgba<ColorT, Order>::premultiply(p);
comp_op_adaptor_rgba<ColorT, Order>::blend_pix(op, p, r, g, b, a, cover);
multiplier_rgba<ColorT, Order>::demultiply(p);
}
};
//=========================================comp_op_adaptor_clip_to_dst_rgba_plain
template<class ColorT, class Order>
struct comp_op_adaptor_clip_to_dst_rgba_plain
{
typedef ColorT color_type;
typedef Order order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
static AGG_INLINE void blend_pix(unsigned op, value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
multiplier_rgba<ColorT, Order>::premultiply(p);
comp_op_adaptor_clip_to_dst_rgba<ColorT, Order>::blend_pix(op, p, r, g, b, a, cover);
multiplier_rgba<ColorT, Order>::demultiply(p);
}
};
//=======================================================comp_adaptor_rgba
template<class BlenderPre>
struct comp_adaptor_rgba
{
typedef typename BlenderPre::color_type color_type;
typedef typename BlenderPre::order_type order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
static AGG_INLINE void blend_pix(unsigned, value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
BlenderPre::blend_pix(p,
color_type::multiply(r, a),
color_type::multiply(g, a),
color_type::multiply(b, a),
a, cover);
}
};
//==========================================comp_adaptor_clip_to_dst_rgba
template<class BlenderPre>
struct comp_adaptor_clip_to_dst_rgba
{
typedef typename BlenderPre::color_type color_type;
typedef typename BlenderPre::order_type order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
static AGG_INLINE void blend_pix(unsigned, value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
r = color_type::multiply(r, a);
g = color_type::multiply(g, a);
b = color_type::multiply(b, a);
value_type da = p[order_type::A];
BlenderPre::blend_pix(p,
color_type::multiply(r, da),
color_type::multiply(g, da),
color_type::multiply(b, da),
color_type::multiply(a, da), cover);
}
};
//=======================================================comp_adaptor_rgba_pre
template<class BlenderPre>
struct comp_adaptor_rgba_pre
{
typedef typename BlenderPre::color_type color_type;
typedef typename BlenderPre::order_type order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
static AGG_INLINE void blend_pix(unsigned, value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
BlenderPre::blend_pix(p, r, g, b, a, cover);
}
};
//======================================comp_adaptor_clip_to_dst_rgba_pre
template<class BlenderPre>
struct comp_adaptor_clip_to_dst_rgba_pre
{
typedef typename BlenderPre::color_type color_type;
typedef typename BlenderPre::order_type order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
static AGG_INLINE void blend_pix(unsigned, value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
unsigned da = p[order_type::A];
BlenderPre::blend_pix(p,
color_type::multiply(r, da),
color_type::multiply(g, da),
color_type::multiply(b, da),
color_type::multiply(a, da),
cover);
}
};
//=======================================================comp_adaptor_rgba_plain
template<class BlenderPre>
struct comp_adaptor_rgba_plain
{
typedef typename BlenderPre::color_type color_type;
typedef typename BlenderPre::order_type order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
static AGG_INLINE void blend_pix(unsigned op, value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
multiplier_rgba<color_type, order_type>::premultiply(p);
comp_adaptor_rgba<BlenderPre>::blend_pix(op, p, r, g, b, a, cover);
multiplier_rgba<color_type, order_type>::demultiply(p);
}
};
//==========================================comp_adaptor_clip_to_dst_rgba_plain
template<class BlenderPre>
struct comp_adaptor_clip_to_dst_rgba_plain
{
typedef typename BlenderPre::color_type color_type;
typedef typename BlenderPre::order_type order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
typedef typename color_type::long_type long_type;
static AGG_INLINE void blend_pix(unsigned op, value_type* p,
value_type r, value_type g, value_type b, value_type a, cover_type cover)
{
multiplier_rgba<color_type, order_type>::premultiply(p);
comp_adaptor_clip_to_dst_rgba<BlenderPre>::blend_pix(op, p, r, g, b, a, cover);
multiplier_rgba<color_type, order_type>::demultiply(p);
}
};
//=================================================pixfmt_alpha_blend_rgba
template<class Blender, class RenBuf>
class pixfmt_alpha_blend_rgba
{
public:
typedef pixfmt_rgba_tag pixfmt_category;
typedef RenBuf rbuf_type;
typedef typename rbuf_type::row_data row_data;
typedef Blender blender_type;
typedef typename blender_type::color_type color_type;
typedef typename blender_type::order_type order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
enum
{
num_components = 4,
pix_step = 4,
pix_width = sizeof(value_type) * pix_step,
};
struct pixel_type
{
value_type c[num_components];
void set(value_type r, value_type g, value_type b, value_type a)
{
c[order_type::R] = r;
c[order_type::G] = g;
c[order_type::B] = b;
c[order_type::A] = a;
}
void set(const color_type& color)
{
set(color.r, color.g, color.b, color.a);
}
void get(value_type& r, value_type& g, value_type& b, value_type& a) const
{
r = c[order_type::R];
g = c[order_type::G];
b = c[order_type::B];
a = c[order_type::A];
}
color_type get() const
{
return color_type(
c[order_type::R],
c[order_type::G],
c[order_type::B],
c[order_type::A]);
}
pixel_type* next()
{
return (pixel_type*)(c + pix_step);
}
const pixel_type* next() const
{
return (const pixel_type*)(c + pix_step);
}
pixel_type* advance(int n)
{
return (pixel_type*)(c + n * pix_step);
}
const pixel_type* advance(int n) const
{
return (const pixel_type*)(c + n * pix_step);
}
};
private:
//--------------------------------------------------------------------
AGG_INLINE void blend_pix(pixel_type* p, const color_type& c, unsigned cover)
{
m_blender.blend_pix(p->c, c.r, c.g, c.b, c.a, cover);
}
//--------------------------------------------------------------------
AGG_INLINE void blend_pix(pixel_type* p, const color_type& c)
{
m_blender.blend_pix(p->c, c.r, c.g, c.b, c.a);
}
//--------------------------------------------------------------------
AGG_INLINE void copy_or_blend_pix(pixel_type* p, const color_type& c, unsigned cover)
{
if (!c.is_transparent())
{
if (c.is_opaque() && cover == cover_mask)
{
p->set(c.r, c.g, c.b, c.a);
}
else
{
m_blender.blend_pix(p->c, c.r, c.g, c.b, c.a, cover);
}
}
}
//--------------------------------------------------------------------
AGG_INLINE void copy_or_blend_pix(pixel_type* p, const color_type& c)
{
if (!c.is_transparent())
{
if (c.is_opaque())
{
p->set(c.r, c.g, c.b, c.a);
}
else
{
m_blender.blend_pix(p->c, c.r, c.g, c.b, c.a);
}
}
}
public:
//--------------------------------------------------------------------
pixfmt_alpha_blend_rgba() : m_rbuf(0) {}
explicit pixfmt_alpha_blend_rgba(rbuf_type& rb) : m_rbuf(&rb) {}
void attach(rbuf_type& rb) { m_rbuf = &rb; }
//--------------------------------------------------------------------
template<class PixFmt>
bool attach(PixFmt& pixf, int x1, int y1, int x2, int y2)
{
rect_i r(x1, y1, x2, y2);
if (r.clip(rect_i(0, 0, pixf.width()-1, pixf.height()-1)))
{
int stride = pixf.stride();
m_rbuf->attach(pixf.pix_ptr(r.x1, stride < 0 ? r.y2 : r.y1),
(r.x2 - r.x1) + 1,
(r.y2 - r.y1) + 1,
stride);
return true;
}
return false;
}
//--------------------------------------------------------------------
AGG_INLINE unsigned width() const { return m_rbuf->width(); }
AGG_INLINE unsigned height() const { return m_rbuf->height(); }
AGG_INLINE int stride() const { return m_rbuf->stride(); }
//--------------------------------------------------------------------
AGG_INLINE int8u* row_ptr(int y) { return m_rbuf->row_ptr(y); }
AGG_INLINE const int8u* row_ptr(int y) const { return m_rbuf->row_ptr(y); }
AGG_INLINE row_data row(int y) const { return m_rbuf->row(y); }
//--------------------------------------------------------------------
AGG_INLINE int8u* pix_ptr(int x, int y)
{
return m_rbuf->row_ptr(y) + sizeof(value_type) * (x * pix_step);
}
AGG_INLINE const int8u* pix_ptr(int x, int y) const
{
return m_rbuf->row_ptr(y) + sizeof(value_type) * (x * pix_step);
}
// Return pointer to pixel value, forcing row to be allocated.
AGG_INLINE pixel_type* pix_value_ptr(int x, int y, unsigned len)
{
return (pixel_type*)(m_rbuf->row_ptr(x, y, len) + sizeof(value_type) * (x * pix_step));
}
// Return pointer to pixel value, or null if row not allocated.
AGG_INLINE const pixel_type* pix_value_ptr(int x, int y) const
{
int8u* p = m_rbuf->row_ptr(y);
return p ? (pixel_type*)(p + sizeof(value_type) * (x * pix_step)) : 0;
}
// Get pixel pointer from raw buffer pointer.
AGG_INLINE static pixel_type* pix_value_ptr(void* p)
{
return (pixel_type*)p;
}
// Get pixel pointer from raw buffer pointer.
AGG_INLINE static const pixel_type* pix_value_ptr(const void* p)
{
return (const pixel_type*)p;
}
//--------------------------------------------------------------------
AGG_INLINE static void write_plain_color(void* p, color_type c)
{
blender_type::set_plain_color(pix_value_ptr(p)->c, c);
}
//--------------------------------------------------------------------
AGG_INLINE static color_type read_plain_color(const void* p)
{
return blender_type::get_plain_color(pix_value_ptr(p)->c);
}
//--------------------------------------------------------------------
AGG_INLINE static void make_pix(int8u* p, const color_type& c)
{
((pixel_type*)p)->set(c);
}
//--------------------------------------------------------------------
AGG_INLINE color_type pixel(int x, int y) const
{
if (const pixel_type* p = pix_value_ptr(x, y))
{
return p->get();
}
return color_type::no_color();
}
//--------------------------------------------------------------------
AGG_INLINE void copy_pixel(int x, int y, const color_type& c)
{
pix_value_ptr(x, y, 1)->set(c);
}
//--------------------------------------------------------------------
AGG_INLINE void blend_pixel(int x, int y, const color_type& c, int8u cover)
{
copy_or_blend_pix(pix_value_ptr(x, y, 1), c, cover);
}
//--------------------------------------------------------------------
AGG_INLINE void copy_hline(int x, int y,
unsigned len,
const color_type& c)
{
pixel_type v;
v.set(c);
pixel_type* p = pix_value_ptr(x, y, len);
do
{
*p = v;
p = p->next();
}
while (--len);
}
//--------------------------------------------------------------------
AGG_INLINE void copy_vline(int x, int y,
unsigned len,
const color_type& c)
{
pixel_type v;
v.set(c);
do
{
*pix_value_ptr(x, y++, 1) = v;
}
while (--len);
}
//--------------------------------------------------------------------
void blend_hline(int x, int y,
unsigned len,
const color_type& c,
int8u cover)
{
if (!c.is_transparent())
{
pixel_type* p = pix_value_ptr(x, y, len);
if (c.is_opaque() && cover == cover_mask)
{
pixel_type v;
v.set(c);
do
{
*p = v;
p = p->next();
}
while (--len);
}
else
{
if (cover == cover_mask)
{
do
{
blend_pix(p, c);
p = p->next();
}
while (--len);
}
else
{
do
{
blend_pix(p, c, cover);
p = p->next();
}
while (--len);
}
}
}
}
//--------------------------------------------------------------------
void blend_vline(int x, int y,
unsigned len,
const color_type& c,
int8u cover)
{
if (!c.is_transparent())
{
if (c.is_opaque() && cover == cover_mask)
{
pixel_type v;
v.set(c);
do
{
*pix_value_ptr(x, y++, 1) = v;
}
while (--len);
}
else
{
if (cover == cover_mask)
{
do
{
blend_pix(pix_value_ptr(x, y++, 1), c, c.a);
}
while (--len);
}
else
{
do
{
blend_pix(pix_value_ptr(x, y++, 1), c, cover);
}
while (--len);
}
}
}
}
//--------------------------------------------------------------------
void blend_solid_hspan(int x, int y,
unsigned len,
const color_type& c,
const int8u* covers)
{
if (!c.is_transparent())
{
pixel_type* p = pix_value_ptr(x, y, len);
do
{
if (c.is_opaque() && *covers == cover_mask)
{
p->set(c);
}
else
{
blend_pix(p, c, *covers);
}
p = p->next();
++covers;
}
while (--len);
}
}
//--------------------------------------------------------------------
void blend_solid_vspan(int x, int y,
unsigned len,
const color_type& c,
const int8u* covers)
{
if (!c.is_transparent())
{
do
{
pixel_type* p = pix_value_ptr(x, y++, 1);
if (c.is_opaque() && *covers == cover_mask)
{
p->set(c);
}
else
{
blend_pix(p, c, *covers);
}
++covers;
}
while (--len);
}
}
//--------------------------------------------------------------------
void copy_color_hspan(int x, int y,
unsigned len,
const color_type* colors)
{
pixel_type* p = pix_value_ptr(x, y, len);
do
{
p->set(*colors++);
p = p->next();
}
while (--len);
}
//--------------------------------------------------------------------
void copy_color_vspan(int x, int y,
unsigned len,
const color_type* colors)
{
do
{
pix_value_ptr(x, y++, 1)->set(*colors++);
}
while (--len);
}
//--------------------------------------------------------------------
void blend_color_hspan(int x, int y,
unsigned len,
const color_type* colors,
const int8u* covers,
int8u cover)
{
pixel_type* p = pix_value_ptr(x, y, len);
if (covers)
{
do
{
copy_or_blend_pix(p, *colors++, *covers++);
p = p->next();
}
while (--len);
}
else
{
if (cover == cover_mask)
{
do
{
copy_or_blend_pix(p, *colors++);
p = p->next();
}
while (--len);
}
else
{
do
{
copy_or_blend_pix(p, *colors++, cover);
p = p->next();
}
while (--len);
}
}
}
//--------------------------------------------------------------------
void blend_color_vspan(int x, int y,
unsigned len,
const color_type* colors,
const int8u* covers,
int8u cover)
{
if (covers)
{
do
{
copy_or_blend_pix(pix_value_ptr(x, y++, 1), *colors++, *covers++);
}
while (--len);
}
else
{
if (cover == cover_mask)
{
do
{
copy_or_blend_pix(pix_value_ptr(x, y++, 1), *colors++);
}
while (--len);
}
else
{
do
{
copy_or_blend_pix(pix_value_ptr(x, y++, 1), *colors++, cover);
}
while (--len);
}
}
}
//--------------------------------------------------------------------
template<class Function> void for_each_pixel(Function f)
{
for (unsigned y = 0; y < height(); ++y)
{
row_data r = m_rbuf->row(y);
if (r.ptr)
{
unsigned len = r.x2 - r.x1 + 1;
pixel_type* p = pix_value_ptr(r.x1, y, len);
do
{
f(p->c);
p = p->next();
}
while (--len);
}
}
}
//--------------------------------------------------------------------
void premultiply()
{
for_each_pixel(multiplier_rgba<color_type, order_type>::premultiply);
}
//--------------------------------------------------------------------
void demultiply()
{
for_each_pixel(multiplier_rgba<color_type, order_type>::demultiply);
}
//--------------------------------------------------------------------
template<class GammaLut> void apply_gamma_dir(const GammaLut& g)
{
for_each_pixel(apply_gamma_dir_rgba<color_type, order_type, GammaLut>(g));
}
//--------------------------------------------------------------------
template<class GammaLut> void apply_gamma_inv(const GammaLut& g)
{
for_each_pixel(apply_gamma_inv_rgba<color_type, order_type, GammaLut>(g));
}
//--------------------------------------------------------------------
template<class RenBuf2> void copy_from(const RenBuf2& from,
int xdst, int ydst,
int xsrc, int ysrc,
unsigned len)
{
if (const int8u* p = from.row_ptr(ysrc))
{
std::memmove(m_rbuf->row_ptr(xdst, ydst, len) + xdst * pix_width,
p + xsrc * pix_width,
len * pix_width);
}
}
//--------------------------------------------------------------------
// Blend from another RGBA surface.
template<class SrcPixelFormatRenderer>
void blend_from(const SrcPixelFormatRenderer& from,
int xdst, int ydst,
int xsrc, int ysrc,
unsigned len,
int8u cover)
{
typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type;
if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc))
{
pixel_type* pdst = pix_value_ptr(xdst, ydst, len);
int srcinc = 1;
int dstinc = 1;
if (xdst > xsrc)
{
psrc = psrc->advance(len - 1);
pdst = pdst->advance(len - 1);
srcinc = -1;
dstinc = -1;
}
if (cover == cover_mask)
{
do
{
copy_or_blend_pix(pdst, psrc->get());
psrc = psrc->advance(srcinc);
pdst = pdst->advance(dstinc);
}
while (--len);
}
else
{
do
{
copy_or_blend_pix(pdst, psrc->get(), cover);
psrc = psrc->advance(srcinc);
pdst = pdst->advance(dstinc);
}
while (--len);
}
}
}
//--------------------------------------------------------------------
// Combine single color with grayscale surface and blend.
template<class SrcPixelFormatRenderer>
void blend_from_color(const SrcPixelFormatRenderer& from,
const color_type& color,
int xdst, int ydst,
int xsrc, int ysrc,
unsigned len,
int8u cover)
{
typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type;
typedef typename SrcPixelFormatRenderer::color_type src_color_type;
if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc))
{
pixel_type* pdst = pix_value_ptr(xdst, ydst, len);
do
{
copy_or_blend_pix(pdst, color,
src_color_type::scale_cover(cover, psrc->c[0]));
psrc = psrc->next();
pdst = pdst->next();
}
while (--len);
}
}
//--------------------------------------------------------------------
// Blend from color table, using grayscale surface as indexes into table.
// Obviously, this only works for integer value types.
template<class SrcPixelFormatRenderer>
void blend_from_lut(const SrcPixelFormatRenderer& from,
const color_type* color_lut,
int xdst, int ydst,
int xsrc, int ysrc,
unsigned len,
int8u cover)
{
typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type;
if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc))
{
pixel_type* pdst = pix_value_ptr(xdst, ydst, len);
if (cover == cover_mask)
{
do
{
copy_or_blend_pix(pdst, color_lut[psrc->c[0]]);
psrc = psrc->next();
pdst = pdst->next();
}
while (--len);
}
else
{
do
{
copy_or_blend_pix(pdst, color_lut[psrc->c[0]], cover);
psrc = psrc->next();
pdst = pdst->next();
}
while (--len);
}
}
}
private:
rbuf_type* m_rbuf;
Blender m_blender;
};
//================================================pixfmt_custom_blend_rgba
template<class Blender, class RenBuf> class pixfmt_custom_blend_rgba
{
public:
typedef pixfmt_rgba_tag pixfmt_category;
typedef RenBuf rbuf_type;
typedef typename rbuf_type::row_data row_data;
typedef Blender blender_type;
typedef typename blender_type::color_type color_type;
typedef typename blender_type::order_type order_type;
typedef typename color_type::value_type value_type;
typedef typename color_type::calc_type calc_type;
enum
{
num_components = 4,
pix_step = 4,
pix_width = sizeof(value_type) * pix_step,
};
struct pixel_type
{
value_type c[num_components];
void set(value_type r, value_type g, value_type b, value_type a)
{
c[order_type::R] = r;
c[order_type::G] = g;
c[order_type::B] = b;
c[order_type::A] = a;
}
void set(const color_type& color)
{
set(color.r, color.g, color.b, color.a);
}
void get(value_type& r, value_type& g, value_type& b, value_type& a) const
{
r = c[order_type::R];
g = c[order_type::G];
b = c[order_type::B];
a = c[order_type::A];
}
color_type get() const
{
return color_type(
c[order_type::R],
c[order_type::G],
c[order_type::B],
c[order_type::A]);
}
pixel_type* next()
{
return (pixel_type*)(c + pix_step);
}
const pixel_type* next() const
{
return (const pixel_type*)(c + pix_step);
}
pixel_type* advance(int n)
{
return (pixel_type*)(c + n * pix_step);
}
const pixel_type* advance(int n) const
{
return (const pixel_type*)(c + n * pix_step);
}
};
private:
//--------------------------------------------------------------------
AGG_INLINE void blend_pix(pixel_type* p, const color_type& c, unsigned cover = cover_full)
{
m_blender.blend_pix(m_comp_op, p->c, c.r, c.g, c.b, c.a, cover);
}
//--------------------------------------------------------------------
AGG_INLINE void copy_or_blend_pix(pixel_type* p, const color_type& c, unsigned cover = cover_full)
{
if (!c.is_transparent())
{
if (c.is_opaque() && cover == cover_mask)
{
p->set(c.r, c.g, c.b, c.a);
}
else
{
blend_pix(p, c, cover);
}
}
}
public:
//--------------------------------------------------------------------
pixfmt_custom_blend_rgba() : m_rbuf(0), m_comp_op(3) {}
explicit pixfmt_custom_blend_rgba(rbuf_type& rb, unsigned comp_op=3) :
m_rbuf(&rb),
m_comp_op(comp_op)
{}
void attach(rbuf_type& rb) { m_rbuf = &rb; }
//--------------------------------------------------------------------
template<class PixFmt>
bool attach(PixFmt& pixf, int x1, int y1, int x2, int y2)
{
rect_i r(x1, y1, x2, y2);
if (r.clip(rect_i(0, 0, pixf.width()-1, pixf.height()-1)))
{
int stride = pixf.stride();
m_rbuf->attach(pixf.pix_ptr(r.x1, stride < 0 ? r.y2 : r.y1),
(r.x2 - r.x1) + 1,
(r.y2 - r.y1) + 1,
stride);
return true;
}
return false;
}
//--------------------------------------------------------------------
void comp_op(unsigned op) { m_comp_op = op; }
unsigned comp_op() const { return m_comp_op; }
//--------------------------------------------------------------------
AGG_INLINE unsigned width() const { return m_rbuf->width(); }
AGG_INLINE unsigned height() const { return m_rbuf->height(); }
AGG_INLINE int stride() const { return m_rbuf->stride(); }
//--------------------------------------------------------------------
AGG_INLINE int8u* row_ptr(int y) { return m_rbuf->row_ptr(y); }
AGG_INLINE const int8u* row_ptr(int y) const { return m_rbuf->row_ptr(y); }
AGG_INLINE row_data row(int y) const { return m_rbuf->row(y); }
//--------------------------------------------------------------------
AGG_INLINE int8u* pix_ptr(int x, int y)
{
return m_rbuf->row_ptr(y) + sizeof(value_type) * (x * pix_step);
}
AGG_INLINE const int8u* pix_ptr(int x, int y) const
{
return m_rbuf->row_ptr(y) + sizeof(value_type) * (x * pix_step);
}
// Return pointer to pixel value, forcing row to be allocated.
AGG_INLINE pixel_type* pix_value_ptr(int x, int y, unsigned len)
{
return (pixel_type*)(m_rbuf->row_ptr(x, y, len) + sizeof(value_type) * (x * pix_step));
}
// Return pointer to pixel value, or null if row not allocated.
AGG_INLINE const pixel_type* pix_value_ptr(int x, int y) const
{
int8u* p = m_rbuf->row_ptr(y);
return p ? (pixel_type*)(p + sizeof(value_type) * (x * pix_step)) : 0;
}
// Get pixel pointer from raw buffer pointer.
AGG_INLINE static pixel_type* pix_value_ptr(void* p)
{
return (pixel_type*)p;
}
// Get pixel pointer from raw buffer pointer.
AGG_INLINE static const pixel_type* pix_value_ptr(const void* p)
{
return (const pixel_type*)p;
}
//--------------------------------------------------------------------
AGG_INLINE static void make_pix(int8u* p, const color_type& c)
{
((pixel_type*)p)->set(c);
}
//--------------------------------------------------------------------
AGG_INLINE color_type pixel(int x, int y) const
{
if (const pixel_type* p = pix_value_ptr(x, y))
{
return p->get();
}
return color_type::no_color();
}
//--------------------------------------------------------------------
AGG_INLINE void copy_pixel(int x, int y, const color_type& c)
{
pix_value_ptr(x, y, 1)->set(c);
}
//--------------------------------------------------------------------
AGG_INLINE void blend_pixel(int x, int y, const color_type& c, int8u cover)
{
blend_pix(pix_value_ptr(x, y, 1), c, cover);
}
//--------------------------------------------------------------------
AGG_INLINE void copy_hline(int x, int y,
unsigned len,
const color_type& c)
{
pixel_type v;
v.set(c);
pixel_type* p = pix_value_ptr(x, y, len);
do
{
*p = v;
p = p->next();
}
while (--len);
}
//--------------------------------------------------------------------
AGG_INLINE void copy_vline(int x, int y,
unsigned len,
const color_type& c)
{
pixel_type v;
v.set(c);
do
{
*pix_value_ptr(x, y++, 1) = v;
}
while (--len);
}
//--------------------------------------------------------------------
void blend_hline(int x, int y, unsigned len,
const color_type& c, int8u cover)
{
pixel_type* p = pix_value_ptr(x, y, len);
do
{
blend_pix(p, c, cover);
p = p->next();
}
while (--len);
}
//--------------------------------------------------------------------
void blend_vline(int x, int y, unsigned len,
const color_type& c, int8u cover)
{
do
{
blend_pix(pix_value_ptr(x, y++, 1), c, cover);
}
while (--len);
}
//--------------------------------------------------------------------
void blend_solid_hspan(int x, int y, unsigned len,
const color_type& c, const int8u* covers)
{
pixel_type* p = pix_value_ptr(x, y, len);
do
{
blend_pix(p, c, *covers++);
p = p->next();
}
while (--len);
}
//--------------------------------------------------------------------
void blend_solid_vspan(int x, int y, unsigned len,
const color_type& c, const int8u* covers)
{
do
{
blend_pix(pix_value_ptr(x, y++, 1), c, *covers++);
}
while (--len);
}
//--------------------------------------------------------------------
void copy_color_hspan(int x, int y,
unsigned len,
const color_type* colors)
{
pixel_type* p = pix_value_ptr(x, y, len);
do
{
p->set(*colors++);
p = p->next();
}
while (--len);
}
//--------------------------------------------------------------------
void copy_color_vspan(int x, int y,
unsigned len,
const color_type* colors)
{
do
{
pix_value_ptr(x, y++, 1)->set(*colors++);
}
while (--len);
}
//--------------------------------------------------------------------
void blend_color_hspan(int x, int y, unsigned len,
const color_type* colors,
const int8u* covers,
int8u cover)
{
pixel_type* p = pix_value_ptr(x, y, len);
do
{
blend_pix(p, *colors++, covers ? *covers++ : cover);
p = p->next();
}
while (--len);
}
//--------------------------------------------------------------------
void blend_color_vspan(int x, int y, unsigned len,
const color_type* colors,
const int8u* covers,
int8u cover)
{
do
{
blend_pix(pix_value_ptr(x, y++, 1), *colors++, covers ? *covers++ : cover);
}
while (--len);
}
//--------------------------------------------------------------------
template<class Function> void for_each_pixel(Function f)
{
unsigned y;
for (y = 0; y < height(); ++y)
{
row_data r = m_rbuf->row(y);
if (r.ptr)
{
unsigned len = r.x2 - r.x1 + 1;
pixel_type* p = pix_value_ptr(r.x1, y, len);
do
{
f(p->c);
p = p->next();
}
while (--len);
}
}
}
//--------------------------------------------------------------------
void premultiply()
{
for_each_pixel(multiplier_rgba<color_type, order_type>::premultiply);
}
//--------------------------------------------------------------------
void demultiply()
{
for_each_pixel(multiplier_rgba<color_type, order_type>::demultiply);
}
//--------------------------------------------------------------------
template<class GammaLut> void apply_gamma_dir(const GammaLut& g)
{
for_each_pixel(apply_gamma_dir_rgba<color_type, order_type, GammaLut>(g));
}
//--------------------------------------------------------------------
template<class GammaLut> void apply_gamma_inv(const GammaLut& g)
{
for_each_pixel(apply_gamma_inv_rgba<color_type, order_type, GammaLut>(g));
}
//--------------------------------------------------------------------
template<class RenBuf2> void copy_from(const RenBuf2& from,
int xdst, int ydst,
int xsrc, int ysrc,
unsigned len)
{
if (const int8u* p = from.row_ptr(ysrc))
{
std::memmove(m_rbuf->row_ptr(xdst, ydst, len) + xdst * pix_width,
p + xsrc * pix_width,
len * pix_width);
}
}
//--------------------------------------------------------------------
// Blend from another RGBA surface.
template<class SrcPixelFormatRenderer>
void blend_from(const SrcPixelFormatRenderer& from,
int xdst, int ydst,
int xsrc, int ysrc,
unsigned len,
int8u cover)
{
typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type;
if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc))
{
pixel_type* pdst = pix_value_ptr(xdst, ydst, len);
int srcinc = 1;
int dstinc = 1;
if (xdst > xsrc)
{
psrc = psrc->advance(len - 1);
pdst = pdst->advance(len - 1);
srcinc = -1;
dstinc = -1;
}
do
{
blend_pix(pdst, psrc->get(), cover);
psrc = psrc->advance(srcinc);
pdst = pdst->advance(dstinc);
}
while (--len);
}
}
//--------------------------------------------------------------------
// Blend from single color, using grayscale surface as alpha channel.
template<class SrcPixelFormatRenderer>
void blend_from_color(const SrcPixelFormatRenderer& from,
const color_type& color,
int xdst, int ydst,
int xsrc, int ysrc,
unsigned len,
int8u cover)
{
typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type;
typedef typename SrcPixelFormatRenderer::color_type src_color_type;
if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc))
{
pixel_type* pdst = pix_value_ptr(xdst, ydst, len);
do
{
blend_pix(pdst, color,
src_color_type::scale_cover(cover, psrc->c[0]));
psrc = psrc->next();
pdst = pdst->next();
}
while (--len);
}
}
//--------------------------------------------------------------------
// Blend from color table, using grayscale surface as indexes into table.
// Obviously, this only works for integer value types.
template<class SrcPixelFormatRenderer>
void blend_from_lut(const SrcPixelFormatRenderer& from,
const color_type* color_lut,
int xdst, int ydst,
int xsrc, int ysrc,
unsigned len,
int8u cover)
{
typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type;
if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc))
{
pixel_type* pdst = pix_value_ptr(xdst, ydst, len);
do
{
blend_pix(pdst, color_lut[psrc->c[0]], cover);
psrc = psrc->next();
pdst = pdst->next();
}
while (--len);
}
}
private:
rbuf_type* m_rbuf;
Blender m_blender;
unsigned m_comp_op;
};
//-----------------------------------------------------------------------
typedef blender_rgba<rgba8, order_rgba> blender_rgba32;
typedef blender_rgba<rgba8, order_argb> blender_argb32;
typedef blender_rgba<rgba8, order_abgr> blender_abgr32;
typedef blender_rgba<rgba8, order_bgra> blender_bgra32;
typedef blender_rgba<srgba8, order_rgba> blender_srgba32;
typedef blender_rgba<srgba8, order_argb> blender_sargb32;
typedef blender_rgba<srgba8, order_abgr> blender_sabgr32;
typedef blender_rgba<srgba8, order_bgra> blender_sbgra32;
typedef blender_rgba_pre<rgba8, order_rgba> blender_rgba32_pre;
typedef blender_rgba_pre<rgba8, order_argb> blender_argb32_pre;
typedef blender_rgba_pre<rgba8, order_abgr> blender_abgr32_pre;
typedef blender_rgba_pre<rgba8, order_bgra> blender_bgra32_pre;
typedef blender_rgba_pre<srgba8, order_rgba> blender_srgba32_pre;
typedef blender_rgba_pre<srgba8, order_argb> blender_sargb32_pre;
typedef blender_rgba_pre<srgba8, order_abgr> blender_sabgr32_pre;
typedef blender_rgba_pre<srgba8, order_bgra> blender_sbgra32_pre;
typedef blender_rgba_plain<rgba8, order_rgba> blender_rgba32_plain;
typedef blender_rgba_plain<rgba8, order_argb> blender_argb32_plain;
typedef blender_rgba_plain<rgba8, order_abgr> blender_abgr32_plain;
typedef blender_rgba_plain<rgba8, order_bgra> blender_bgra32_plain;
typedef blender_rgba_plain<srgba8, order_rgba> blender_srgba32_plain;
typedef blender_rgba_plain<srgba8, order_argb> blender_sargb32_plain;
typedef blender_rgba_plain<srgba8, order_abgr> blender_sabgr32_plain;
typedef blender_rgba_plain<srgba8, order_bgra> blender_sbgra32_plain;
typedef blender_rgba<rgba16, order_rgba> blender_rgba64;
typedef blender_rgba<rgba16, order_argb> blender_argb64;
typedef blender_rgba<rgba16, order_abgr> blender_abgr64;
typedef blender_rgba<rgba16, order_bgra> blender_bgra64;
typedef blender_rgba_pre<rgba16, order_rgba> blender_rgba64_pre;
typedef blender_rgba_pre<rgba16, order_argb> blender_argb64_pre;
typedef blender_rgba_pre<rgba16, order_abgr> blender_abgr64_pre;
typedef blender_rgba_pre<rgba16, order_bgra> blender_bgra64_pre;
typedef blender_rgba_plain<rgba16, order_rgba> blender_rgba64_plain;
typedef blender_rgba_plain<rgba16, order_argb> blender_argb64_plain;
typedef blender_rgba_plain<rgba16, order_abgr> blender_abgr64_plain;
typedef blender_rgba_plain<rgba16, order_bgra> blender_bgra64_plain;
typedef blender_rgba<rgba32, order_rgba> blender_rgba128;
typedef blender_rgba<rgba32, order_argb> blender_argb128;
typedef blender_rgba<rgba32, order_abgr> blender_abgr128;
typedef blender_rgba<rgba32, order_bgra> blender_bgra128;
typedef blender_rgba_pre<rgba32, order_rgba> blender_rgba128_pre;
typedef blender_rgba_pre<rgba32, order_argb> blender_argb128_pre;
typedef blender_rgba_pre<rgba32, order_abgr> blender_abgr128_pre;
typedef blender_rgba_pre<rgba32, order_bgra> blender_bgra128_pre;
typedef blender_rgba_plain<rgba32, order_rgba> blender_rgba128_plain;
typedef blender_rgba_plain<rgba32, order_argb> blender_argb128_plain;
typedef blender_rgba_plain<rgba32, order_abgr> blender_abgr128_plain;
typedef blender_rgba_plain<rgba32, order_bgra> blender_bgra128_plain;
//-----------------------------------------------------------------------
typedef pixfmt_alpha_blend_rgba<blender_rgba32, rendering_buffer> pixfmt_rgba32;
typedef pixfmt_alpha_blend_rgba<blender_argb32, rendering_buffer> pixfmt_argb32;
typedef pixfmt_alpha_blend_rgba<blender_abgr32, rendering_buffer> pixfmt_abgr32;
typedef pixfmt_alpha_blend_rgba<blender_bgra32, rendering_buffer> pixfmt_bgra32;
typedef pixfmt_alpha_blend_rgba<blender_srgba32, rendering_buffer> pixfmt_srgba32;
typedef pixfmt_alpha_blend_rgba<blender_sargb32, rendering_buffer> pixfmt_sargb32;
typedef pixfmt_alpha_blend_rgba<blender_sabgr32, rendering_buffer> pixfmt_sabgr32;
typedef pixfmt_alpha_blend_rgba<blender_sbgra32, rendering_buffer> pixfmt_sbgra32;
typedef pixfmt_alpha_blend_rgba<blender_rgba32_pre, rendering_buffer> pixfmt_rgba32_pre;
typedef pixfmt_alpha_blend_rgba<blender_argb32_pre, rendering_buffer> pixfmt_argb32_pre;
typedef pixfmt_alpha_blend_rgba<blender_abgr32_pre, rendering_buffer> pixfmt_abgr32_pre;
typedef pixfmt_alpha_blend_rgba<blender_bgra32_pre, rendering_buffer> pixfmt_bgra32_pre;
typedef pixfmt_alpha_blend_rgba<blender_srgba32_pre, rendering_buffer> pixfmt_srgba32_pre;
typedef pixfmt_alpha_blend_rgba<blender_sargb32_pre, rendering_buffer> pixfmt_sargb32_pre;
typedef pixfmt_alpha_blend_rgba<blender_sabgr32_pre, rendering_buffer> pixfmt_sabgr32_pre;
typedef pixfmt_alpha_blend_rgba<blender_sbgra32_pre, rendering_buffer> pixfmt_sbgra32_pre;
typedef pixfmt_alpha_blend_rgba<blender_rgba32_plain, rendering_buffer> pixfmt_rgba32_plain;
typedef pixfmt_alpha_blend_rgba<blender_argb32_plain, rendering_buffer> pixfmt_argb32_plain;
typedef pixfmt_alpha_blend_rgba<blender_abgr32_plain, rendering_buffer> pixfmt_abgr32_plain;
typedef pixfmt_alpha_blend_rgba<blender_bgra32_plain, rendering_buffer> pixfmt_bgra32_plain;
typedef pixfmt_alpha_blend_rgba<blender_srgba32_plain, rendering_buffer> pixfmt_srgba32_plain;
typedef pixfmt_alpha_blend_rgba<blender_sargb32_plain, rendering_buffer> pixfmt_sargb32_plain;
typedef pixfmt_alpha_blend_rgba<blender_sabgr32_plain, rendering_buffer> pixfmt_sabgr32_plain;
typedef pixfmt_alpha_blend_rgba<blender_sbgra32_plain, rendering_buffer> pixfmt_sbgra32_plain;
typedef pixfmt_alpha_blend_rgba<blender_rgba64, rendering_buffer> pixfmt_rgba64;
typedef pixfmt_alpha_blend_rgba<blender_argb64, rendering_buffer> pixfmt_argb64;
typedef pixfmt_alpha_blend_rgba<blender_abgr64, rendering_buffer> pixfmt_abgr64;
typedef pixfmt_alpha_blend_rgba<blender_bgra64, rendering_buffer> pixfmt_bgra64;
typedef pixfmt_alpha_blend_rgba<blender_rgba64_pre, rendering_buffer> pixfmt_rgba64_pre;
typedef pixfmt_alpha_blend_rgba<blender_argb64_pre, rendering_buffer> pixfmt_argb64_pre;
typedef pixfmt_alpha_blend_rgba<blender_abgr64_pre, rendering_buffer> pixfmt_abgr64_pre;
typedef pixfmt_alpha_blend_rgba<blender_bgra64_pre, rendering_buffer> pixfmt_bgra64_pre;
typedef pixfmt_alpha_blend_rgba<blender_rgba64_plain, rendering_buffer> pixfmt_rgba64_plain;
typedef pixfmt_alpha_blend_rgba<blender_argb64_plain, rendering_buffer> pixfmt_argb64_plain;
typedef pixfmt_alpha_blend_rgba<blender_abgr64_plain, rendering_buffer> pixfmt_abgr64_plain;
typedef pixfmt_alpha_blend_rgba<blender_bgra64_plain, rendering_buffer> pixfmt_bgra64_plain;
typedef pixfmt_alpha_blend_rgba<blender_rgba128, rendering_buffer> pixfmt_rgba128;
typedef pixfmt_alpha_blend_rgba<blender_argb128, rendering_buffer> pixfmt_argb128;
typedef pixfmt_alpha_blend_rgba<blender_abgr128, rendering_buffer> pixfmt_abgr128;
typedef pixfmt_alpha_blend_rgba<blender_bgra128, rendering_buffer> pixfmt_bgra128;
typedef pixfmt_alpha_blend_rgba<blender_rgba128_pre, rendering_buffer> pixfmt_rgba128_pre;
typedef pixfmt_alpha_blend_rgba<blender_argb128_pre, rendering_buffer> pixfmt_argb128_pre;
typedef pixfmt_alpha_blend_rgba<blender_abgr128_pre, rendering_buffer> pixfmt_abgr128_pre;
typedef pixfmt_alpha_blend_rgba<blender_bgra128_pre, rendering_buffer> pixfmt_bgra128_pre;
typedef pixfmt_alpha_blend_rgba<blender_rgba128_plain, rendering_buffer> pixfmt_rgba128_plain;
typedef pixfmt_alpha_blend_rgba<blender_argb128_plain, rendering_buffer> pixfmt_argb128_plain;
typedef pixfmt_alpha_blend_rgba<blender_abgr128_plain, rendering_buffer> pixfmt_abgr128_plain;
typedef pixfmt_alpha_blend_rgba<blender_bgra128_plain, rendering_buffer> pixfmt_bgra128_plain;
}
#endif
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