793 lines
28 KiB
C++
793 lines
28 KiB
C++
//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.4
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
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//
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// Permission to copy, use, modify, sell and distribute this software
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// is granted provided this copyright notice appears in all copies.
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// This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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//----------------------------------------------------------------------------
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://www.antigrain.com
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//----------------------------------------------------------------------------
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//
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// Adaptation for high precision colors has been sponsored by
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// Liberty Technology Systems, Inc., visit http://lib-sys.com
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//
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// Liberty Technology Systems, Inc. is the provider of
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// PostScript and PDF technology for software developers.
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//
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//----------------------------------------------------------------------------
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#ifndef AGG_PIXFMT_RGB_INCLUDED
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#define AGG_PIXFMT_RGB_INCLUDED
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#include <string.h>
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#include "agg_basics.h"
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#include "agg_color_rgba.h"
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#include "agg_rendering_buffer.h"
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namespace agg
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{
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//=====================================================apply_gamma_dir_rgb
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template<class ColorT, class Order, class GammaLut> class apply_gamma_dir_rgb
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{
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public:
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typedef typename ColorT::value_type value_type;
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apply_gamma_dir_rgb(const GammaLut& gamma) : m_gamma(gamma) {}
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AGG_INLINE void operator () (value_type* p)
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{
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p[Order::R] = m_gamma.dir(p[Order::R]);
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p[Order::G] = m_gamma.dir(p[Order::G]);
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p[Order::B] = m_gamma.dir(p[Order::B]);
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}
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private:
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const GammaLut& m_gamma;
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};
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//=====================================================apply_gamma_inv_rgb
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template<class ColorT, class Order, class GammaLut> class apply_gamma_inv_rgb
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{
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public:
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typedef typename ColorT::value_type value_type;
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apply_gamma_inv_rgb(const GammaLut& gamma) : m_gamma(gamma) {}
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AGG_INLINE void operator () (value_type* p)
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{
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p[Order::R] = m_gamma.inv(p[Order::R]);
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p[Order::G] = m_gamma.inv(p[Order::G]);
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p[Order::B] = m_gamma.inv(p[Order::B]);
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}
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private:
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const GammaLut& m_gamma;
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};
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//=========================================================blender_rgb
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template<class ColorT, class Order> struct blender_rgb
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{
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typedef ColorT color_type;
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typedef Order order_type;
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typedef typename color_type::value_type value_type;
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typedef typename color_type::calc_type calc_type;
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enum base_scale_e { base_shift = color_type::base_shift };
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//--------------------------------------------------------------------
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static AGG_INLINE void blend_pix(value_type* p,
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unsigned cr, unsigned cg, unsigned cb,
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unsigned alpha,
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unsigned cover=0)
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{
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p[Order::R] += (value_type)(((cr - p[Order::R]) * alpha) >> base_shift);
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p[Order::G] += (value_type)(((cg - p[Order::G]) * alpha) >> base_shift);
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p[Order::B] += (value_type)(((cb - p[Order::B]) * alpha) >> base_shift);
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}
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};
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//======================================================blender_rgb_pre
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template<class ColorT, class Order> struct blender_rgb_pre
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{
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typedef ColorT color_type;
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typedef Order order_type;
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typedef typename color_type::value_type value_type;
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typedef typename color_type::calc_type calc_type;
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enum base_scale_e { base_shift = color_type::base_shift };
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//--------------------------------------------------------------------
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static AGG_INLINE void blend_pix(value_type* p,
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unsigned cr, unsigned cg, unsigned cb,
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unsigned alpha,
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unsigned cover)
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{
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alpha = color_type::base_mask - alpha;
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cover = (cover + 1) << (base_shift - 8);
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p[Order::R] = (value_type)((p[Order::R] * alpha + cr * cover) >> base_shift);
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p[Order::G] = (value_type)((p[Order::G] * alpha + cg * cover) >> base_shift);
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p[Order::B] = (value_type)((p[Order::B] * alpha + cb * cover) >> base_shift);
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}
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//--------------------------------------------------------------------
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static AGG_INLINE void blend_pix(value_type* p,
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unsigned cr, unsigned cg, unsigned cb,
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unsigned alpha)
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{
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alpha = color_type::base_mask - alpha;
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p[Order::R] = (value_type)(((p[Order::R] * alpha) >> base_shift) + cr);
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p[Order::G] = (value_type)(((p[Order::G] * alpha) >> base_shift) + cg);
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p[Order::B] = (value_type)(((p[Order::B] * alpha) >> base_shift) + cb);
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}
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};
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//===================================================blender_rgb_gamma
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template<class ColorT, class Order, class Gamma> class blender_rgb_gamma
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{
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public:
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typedef ColorT color_type;
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typedef Order order_type;
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typedef Gamma gamma_type;
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typedef typename color_type::value_type value_type;
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typedef typename color_type::calc_type calc_type;
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enum base_scale_e { base_shift = color_type::base_shift };
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//--------------------------------------------------------------------
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blender_rgb_gamma() : m_gamma(0) {}
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void gamma(const gamma_type& g) { m_gamma = &g; }
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//--------------------------------------------------------------------
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AGG_INLINE void blend_pix(value_type* p,
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unsigned cr, unsigned cg, unsigned cb,
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unsigned alpha,
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unsigned cover=0)
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{
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calc_type r = m_gamma->dir(p[Order::R]);
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calc_type g = m_gamma->dir(p[Order::G]);
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calc_type b = m_gamma->dir(p[Order::B]);
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p[Order::R] = m_gamma->inv((((m_gamma->dir(cr) - r) * alpha) >> base_shift) + r);
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p[Order::G] = m_gamma->inv((((m_gamma->dir(cg) - g) * alpha) >> base_shift) + g);
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p[Order::B] = m_gamma->inv((((m_gamma->dir(cb) - b) * alpha) >> base_shift) + b);
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}
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private:
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const gamma_type* m_gamma;
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};
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//==================================================pixfmt_alpha_blend_rgb
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template<class Blender, class RenBuf> class pixfmt_alpha_blend_rgb
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{
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public:
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typedef RenBuf rbuf_type;
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typedef Blender blender_type;
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typedef typename rbuf_type::row_data row_data;
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typedef typename blender_type::color_type color_type;
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typedef typename blender_type::order_type order_type;
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typedef typename color_type::value_type value_type;
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typedef typename color_type::calc_type calc_type;
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enum base_scale_e
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{
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base_shift = color_type::base_shift,
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base_scale = color_type::base_scale,
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base_mask = color_type::base_mask,
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pix_width = sizeof(value_type) * 3
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};
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private:
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//--------------------------------------------------------------------
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AGG_INLINE void copy_or_blend_pix(value_type* p,
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const color_type& c,
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unsigned cover)
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{
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if (c.a)
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{
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calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
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if(alpha == base_mask)
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{
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p[order_type::R] = c.r;
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p[order_type::G] = c.g;
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p[order_type::B] = c.b;
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}
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else
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{
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m_blender.blend_pix(p, c.r, c.g, c.b, alpha, cover);
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}
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}
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}
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//--------------------------------------------------------------------
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AGG_INLINE void copy_or_blend_pix(value_type* p,
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const color_type& c)
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{
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if (c.a)
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{
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if(c.a == base_mask)
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{
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p[order_type::R] = c.r;
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p[order_type::G] = c.g;
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p[order_type::B] = c.b;
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}
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else
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{
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m_blender.blend_pix(p, c.r, c.g, c.b, c.a);
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}
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}
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}
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public:
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//--------------------------------------------------------------------
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pixfmt_alpha_blend_rgb(rbuf_type& rb) :
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m_rbuf(&rb)
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{}
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void attach(rbuf_type& rb) { m_rbuf = &rb; }
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//--------------------------------------------------------------------
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template<class PixFmt>
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bool attach(PixFmt& pixf, int x1, int y1, int x2, int y2)
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{
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rect_i r(x1, y1, x2, y2);
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if(r.clip(rect_i(0, 0, pixf.width()-1, pixf.height()-1)))
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{
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int stride = pixf.stride();
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m_rbuf->attach(pixf.pix_ptr(r.x1, stride < 0 ? r.y2 : r.y1),
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(r.x2 - r.x1) + 1,
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(r.y2 - r.y1) + 1,
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stride);
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return true;
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}
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return false;
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}
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//--------------------------------------------------------------------
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Blender& blender() { return m_blender; }
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//--------------------------------------------------------------------
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AGG_INLINE unsigned width() const { return m_rbuf->width(); }
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AGG_INLINE unsigned height() const { return m_rbuf->height(); }
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AGG_INLINE int stride() const { return m_rbuf->stride(); }
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//--------------------------------------------------------------------
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AGG_INLINE int8u* row_ptr(int y) { return m_rbuf->row_ptr(y); }
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AGG_INLINE const int8u* row_ptr(int y) const { return m_rbuf->row_ptr(y); }
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AGG_INLINE row_data row(int y) const { return m_rbuf->row(y); }
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//--------------------------------------------------------------------
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AGG_INLINE int8u* pix_ptr(int x, int y)
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{
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return m_rbuf->row_ptr(y) + x * pix_width;
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}
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AGG_INLINE const int8u* pix_ptr(int x, int y) const
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{
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return m_rbuf->row_ptr(y) + x * pix_width;
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}
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//--------------------------------------------------------------------
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AGG_INLINE static void make_pix(int8u* p, const color_type& c)
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{
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((value_type*)p)[order_type::R] = c.r;
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((value_type*)p)[order_type::G] = c.g;
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((value_type*)p)[order_type::B] = c.b;
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}
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//--------------------------------------------------------------------
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AGG_INLINE color_type pixel(int x, int y) const
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{
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value_type* p = (value_type*)m_rbuf->row_ptr(y) + x + x + x;
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return color_type(p[order_type::R],
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p[order_type::G],
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p[order_type::B]);
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}
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//--------------------------------------------------------------------
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AGG_INLINE void copy_pixel(int x, int y, const color_type& c)
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{
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value_type* p = (value_type*)m_rbuf->row_ptr(x, y, 1) + x + x + x;
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p[order_type::R] = c.r;
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p[order_type::G] = c.g;
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p[order_type::B] = c.b;
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}
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//--------------------------------------------------------------------
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AGG_INLINE void blend_pixel(int x, int y, const color_type& c, int8u cover)
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{
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copy_or_blend_pix((value_type*)m_rbuf->row_ptr(x, y, 1) + x + x + x, c, cover);
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}
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//--------------------------------------------------------------------
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AGG_INLINE void copy_hline(int x, int y,
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unsigned len,
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const color_type& c)
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{
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value_type* p = (value_type*)m_rbuf->row_ptr(x, y, len) + x + x + x;
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do
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{
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p[order_type::R] = c.r;
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p[order_type::G] = c.g;
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p[order_type::B] = c.b;
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p += 3;
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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AGG_INLINE void copy_vline(int x, int y,
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unsigned len,
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const color_type& c)
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{
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do
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x + x + x;
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p[order_type::R] = c.r;
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p[order_type::G] = c.g;
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p[order_type::B] = c.b;
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void blend_hline(int x, int y,
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unsigned len,
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const color_type& c,
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int8u cover)
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{
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if (c.a)
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y, len) + x + x + x;
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calc_type alpha = (calc_type(c.a) * (calc_type(cover) + 1)) >> 8;
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if(alpha == base_mask)
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{
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do
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{
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p[order_type::R] = c.r;
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p[order_type::G] = c.g;
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p[order_type::B] = c.b;
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p += 3;
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}
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while(--len);
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}
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else
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{
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do
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{
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m_blender.blend_pix(p, c.r, c.g, c.b, alpha, cover);
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p += 3;
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}
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while(--len);
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}
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}
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}
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//--------------------------------------------------------------------
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void blend_vline(int x, int y,
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unsigned len,
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const color_type& c,
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int8u cover)
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{
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if (c.a)
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{
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value_type* p;
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calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
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if(alpha == base_mask)
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{
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do
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{
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p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x + x + x;
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p[order_type::R] = c.r;
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p[order_type::G] = c.g;
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p[order_type::B] = c.b;
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}
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while(--len);
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}
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else
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{
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do
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{
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p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x + x + x;
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m_blender.blend_pix(p, c.r, c.g, c.b, alpha, cover);
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}
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while(--len);
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}
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}
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}
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//--------------------------------------------------------------------
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void blend_solid_hspan(int x, int y,
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unsigned len,
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const color_type& c,
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const int8u* covers)
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{
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if (c.a)
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y, len) + x + x + x;
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do
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{
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calc_type alpha = (calc_type(c.a) * (calc_type(*covers) + 1)) >> 8;
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if(alpha == base_mask)
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{
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p[order_type::R] = c.r;
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p[order_type::G] = c.g;
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p[order_type::B] = c.b;
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}
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else
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{
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m_blender.blend_pix(p, c.r, c.g, c.b, alpha, *covers);
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}
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p += 3;
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++covers;
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}
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while(--len);
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}
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}
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//--------------------------------------------------------------------
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void blend_solid_vspan(int x, int y,
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unsigned len,
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const color_type& c,
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const int8u* covers)
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{
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if (c.a)
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{
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do
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x + x + x;
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calc_type alpha = (calc_type(c.a) * (calc_type(*covers) + 1)) >> 8;
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if(alpha == base_mask)
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{
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p[order_type::R] = c.r;
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p[order_type::G] = c.g;
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p[order_type::B] = c.b;
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}
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else
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{
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m_blender.blend_pix(p, c.r, c.g, c.b, alpha, *covers);
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}
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++covers;
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}
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while(--len);
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}
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}
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//--------------------------------------------------------------------
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void copy_color_hspan(int x, int y,
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unsigned len,
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const color_type* colors)
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y, len) + x + x + x;
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do
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{
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p[order_type::R] = colors->r;
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p[order_type::G] = colors->g;
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p[order_type::B] = colors->b;
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++colors;
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p += 3;
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void copy_color_vspan(int x, int y,
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unsigned len,
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const color_type* colors)
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{
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do
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y++, 1) + x + x + x;
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p[order_type::R] = colors->r;
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p[order_type::G] = colors->g;
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p[order_type::B] = colors->b;
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++colors;
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}
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while(--len);
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}
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//--------------------------------------------------------------------
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void blend_color_hspan(int x, int y,
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unsigned len,
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const color_type* colors,
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const int8u* covers,
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int8u cover)
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{
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value_type* p = (value_type*)
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m_rbuf->row_ptr(x, y, len) + x + x + x;
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|
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if(covers)
|
|
{
|
|
do
|
|
{
|
|
copy_or_blend_pix(p, *colors++, *covers++);
|
|
p += 3;
|
|
}
|
|
while(--len);
|
|
}
|
|
else
|
|
{
|
|
if(cover == 255)
|
|
{
|
|
do
|
|
{
|
|
copy_or_blend_pix(p, *colors++);
|
|
p += 3;
|
|
}
|
|
while(--len);
|
|
}
|
|
else
|
|
{
|
|
do
|
|
{
|
|
copy_or_blend_pix(p, *colors++, cover);
|
|
p += 3;
|
|
}
|
|
while(--len);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
void blend_color_vspan(int x, int y,
|
|
unsigned len,
|
|
const color_type* colors,
|
|
const int8u* covers,
|
|
int8u cover)
|
|
{
|
|
value_type* p;
|
|
if(covers)
|
|
{
|
|
do
|
|
{
|
|
p = (value_type*)
|
|
m_rbuf->row_ptr(x, y++, 1) + x + x + x;
|
|
|
|
copy_or_blend_pix(p, *colors++, *covers++);
|
|
}
|
|
while(--len);
|
|
}
|
|
else
|
|
{
|
|
if(cover == 255)
|
|
{
|
|
do
|
|
{
|
|
p = (value_type*)
|
|
m_rbuf->row_ptr(x, y++, 1) + x + x + x;
|
|
|
|
copy_or_blend_pix(p, *colors++);
|
|
}
|
|
while(--len);
|
|
}
|
|
else
|
|
{
|
|
do
|
|
{
|
|
p = (value_type*)
|
|
m_rbuf->row_ptr(x, y++, 1) + x + x + x;
|
|
|
|
copy_or_blend_pix(p, *colors++, 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;
|
|
value_type* p = (value_type*)
|
|
m_rbuf->row_ptr(r.x1, y, len) + r.x1 * 3;
|
|
do
|
|
{
|
|
f(p);
|
|
p += 3;
|
|
}
|
|
while(--len);
|
|
}
|
|
}
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<class GammaLut> void apply_gamma_dir(const GammaLut& g)
|
|
{
|
|
for_each_pixel(apply_gamma_dir_rgb<color_type, order_type, GammaLut>(g));
|
|
}
|
|
|
|
//--------------------------------------------------------------------
|
|
template<class GammaLut> void apply_gamma_inv(const GammaLut& g)
|
|
{
|
|
for_each_pixel(apply_gamma_inv_rgb<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)
|
|
{
|
|
const int8u* p = from.row_ptr(ysrc);
|
|
if(p)
|
|
{
|
|
memmove(m_rbuf->row_ptr(xdst, ydst, len) + xdst * pix_width,
|
|
p + xsrc * pix_width,
|
|
len * pix_width);
|
|
}
|
|
}
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
template<class SrcPixelFormatRenderer>
|
|
void blend_from(const SrcPixelFormatRenderer& from,
|
|
int xdst, int ydst,
|
|
int xsrc, int ysrc,
|
|
unsigned len,
|
|
int8u cover)
|
|
{
|
|
typedef typename SrcPixelFormatRenderer::order_type src_order;
|
|
|
|
const value_type* psrc = (const value_type*)from.row_ptr(ysrc);
|
|
if(psrc)
|
|
{
|
|
psrc += xsrc * 4;
|
|
value_type* pdst =
|
|
(value_type*)m_rbuf->row_ptr(xdst, ydst, len) + xdst * 3;
|
|
|
|
if(cover == 255)
|
|
{
|
|
do
|
|
{
|
|
value_type alpha = psrc[src_order::A];
|
|
if(alpha)
|
|
{
|
|
if(alpha == base_mask)
|
|
{
|
|
pdst[order_type::R] = psrc[src_order::R];
|
|
pdst[order_type::G] = psrc[src_order::G];
|
|
pdst[order_type::B] = psrc[src_order::B];
|
|
}
|
|
else
|
|
{
|
|
m_blender.blend_pix(pdst,
|
|
psrc[src_order::R],
|
|
psrc[src_order::G],
|
|
psrc[src_order::B],
|
|
alpha);
|
|
}
|
|
}
|
|
psrc += 4;
|
|
pdst += 3;
|
|
}
|
|
while(--len);
|
|
}
|
|
else
|
|
{
|
|
color_type color;
|
|
do
|
|
{
|
|
color.r = psrc[src_order::R];
|
|
color.g = psrc[src_order::G];
|
|
color.b = psrc[src_order::B];
|
|
color.a = psrc[src_order::A];
|
|
copy_or_blend_pix(pdst, color, cover);
|
|
psrc += 4;
|
|
pdst += 3;
|
|
}
|
|
while(--len);
|
|
}
|
|
}
|
|
}
|
|
|
|
private:
|
|
rbuf_type* m_rbuf;
|
|
Blender m_blender;
|
|
};
|
|
|
|
typedef pixfmt_alpha_blend_rgb<blender_rgb<rgba8, order_rgb>, rendering_buffer> pixfmt_rgb24; //----pixfmt_rgb24
|
|
typedef pixfmt_alpha_blend_rgb<blender_rgb<rgba8, order_bgr>, rendering_buffer> pixfmt_bgr24; //----pixfmt_bgr24
|
|
typedef pixfmt_alpha_blend_rgb<blender_rgb<rgba16, order_rgb>, rendering_buffer> pixfmt_rgb48; //----pixfmt_rgb48
|
|
typedef pixfmt_alpha_blend_rgb<blender_rgb<rgba16, order_bgr>, rendering_buffer> pixfmt_bgr48; //----pixfmt_bgr48
|
|
|
|
typedef pixfmt_alpha_blend_rgb<blender_rgb_pre<rgba8, order_rgb>, rendering_buffer> pixfmt_rgb24_pre; //----pixfmt_rgb24_pre
|
|
typedef pixfmt_alpha_blend_rgb<blender_rgb_pre<rgba8, order_bgr>, rendering_buffer> pixfmt_bgr24_pre; //----pixfmt_bgr24_pre
|
|
typedef pixfmt_alpha_blend_rgb<blender_rgb_pre<rgba16, order_rgb>, rendering_buffer> pixfmt_rgb48_pre; //----pixfmt_rgb48_pre
|
|
typedef pixfmt_alpha_blend_rgb<blender_rgb_pre<rgba16, order_bgr>, rendering_buffer> pixfmt_bgr48_pre; //----pixfmt_bgr48_pre
|
|
|
|
//-----------------------------------------------------pixfmt_rgb24_gamma
|
|
template<class Gamma> class pixfmt_rgb24_gamma :
|
|
public pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba8, order_rgb, Gamma>, rendering_buffer>
|
|
{
|
|
public:
|
|
pixfmt_rgb24_gamma(rendering_buffer& rb, const Gamma& g) :
|
|
pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba8, order_rgb, Gamma>, rendering_buffer>(rb)
|
|
{
|
|
this->blender().gamma(g);
|
|
}
|
|
};
|
|
|
|
//-----------------------------------------------------pixfmt_bgr24_gamma
|
|
template<class Gamma> class pixfmt_bgr24_gamma :
|
|
public pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba8, order_bgr, Gamma>, rendering_buffer>
|
|
{
|
|
public:
|
|
pixfmt_bgr24_gamma(rendering_buffer& rb, const Gamma& g) :
|
|
pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba8, order_bgr, Gamma>, rendering_buffer>(rb)
|
|
{
|
|
this->blender().gamma(g);
|
|
}
|
|
};
|
|
|
|
//-----------------------------------------------------pixfmt_rgb48_gamma
|
|
template<class Gamma> class pixfmt_rgb48_gamma :
|
|
public pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba16, order_rgb, Gamma>, rendering_buffer>
|
|
{
|
|
public:
|
|
pixfmt_rgb48_gamma(rendering_buffer& rb, const Gamma& g) :
|
|
pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba16, order_rgb, Gamma>, rendering_buffer>(rb)
|
|
{
|
|
this->blender().gamma(g);
|
|
}
|
|
};
|
|
|
|
//-----------------------------------------------------pixfmt_bgr48_gamma
|
|
template<class Gamma> class pixfmt_bgr48_gamma :
|
|
public pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba16, order_bgr, Gamma>, rendering_buffer>
|
|
{
|
|
public:
|
|
pixfmt_bgr48_gamma(rendering_buffer& rb, const Gamma& g) :
|
|
pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba16, order_bgr, Gamma>, rendering_buffer>(rb)
|
|
{
|
|
this->blender().gamma(g);
|
|
}
|
|
};
|
|
|
|
|
|
}
|
|
|
|
#endif
|
|
|