891 lines
36 KiB
C++
891 lines
36 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_SPAN_IMAGE_FILTER_RGBA_INCLUDED
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#define AGG_SPAN_IMAGE_FILTER_RGBA_INCLUDED
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#include "agg_basics.h"
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#include "agg_color_rgba.h"
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#include "agg_span_image_filter.h"
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namespace agg
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{
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//==============================================span_image_filter_rgba_nn
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template<class Source, class Interpolator>
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class span_image_filter_rgba_nn :
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public span_image_filter<Source, Interpolator>
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{
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public:
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typedef Source source_type;
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typedef typename source_type::color_type color_type;
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typedef typename source_type::order_type order_type;
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typedef Interpolator interpolator_type;
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typedef span_image_filter<source_type, interpolator_type> base_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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typedef typename color_type::long_type long_type;
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//--------------------------------------------------------------------
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span_image_filter_rgba_nn() {}
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span_image_filter_rgba_nn(source_type& src,
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interpolator_type& inter) :
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base_type(src, inter, 0)
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{}
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//--------------------------------------------------------------------
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void generate(color_type* span, int x, int y, unsigned len)
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{
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base_type::interpolator().begin(x + base_type::filter_dx_dbl(),
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y + base_type::filter_dy_dbl(), len);
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do
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{
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base_type::interpolator().coordinates(&x, &y);
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const value_type* fg_ptr = (const value_type*)
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base_type::source().span(x >> image_subpixel_shift,
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y >> image_subpixel_shift,
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1);
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span->r = fg_ptr[order_type::R];
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span->g = fg_ptr[order_type::G];
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span->b = fg_ptr[order_type::B];
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span->a = fg_ptr[order_type::A];
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++span;
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++base_type::interpolator();
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} while(--len);
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}
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};
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//=========================================span_image_filter_rgba_bilinear
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template<class Source, class Interpolator>
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class span_image_filter_rgba_bilinear :
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public span_image_filter<Source, Interpolator>
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{
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public:
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typedef Source source_type;
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typedef typename source_type::color_type color_type;
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typedef typename source_type::order_type order_type;
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typedef Interpolator interpolator_type;
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typedef span_image_filter<source_type, interpolator_type> base_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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typedef typename color_type::long_type long_type;
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//--------------------------------------------------------------------
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span_image_filter_rgba_bilinear() {}
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span_image_filter_rgba_bilinear(source_type& src,
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interpolator_type& inter) :
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base_type(src, inter, 0)
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{}
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//--------------------------------------------------------------------
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void generate(color_type* span, int x, int y, unsigned len)
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{
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base_type::interpolator().begin(x + base_type::filter_dx_dbl(),
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y + base_type::filter_dy_dbl(), len);
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long_type fg[4];
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const value_type *fg_ptr;
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do
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{
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int x_hr;
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int y_hr;
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base_type::interpolator().coordinates(&x_hr, &y_hr);
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x_hr -= base_type::filter_dx_int();
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y_hr -= base_type::filter_dy_int();
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int x_lr = x_hr >> image_subpixel_shift;
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int y_lr = y_hr >> image_subpixel_shift;
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unsigned weight;
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fg[0] =
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fg[1] =
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fg[2] =
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fg[3] = image_subpixel_scale * image_subpixel_scale / 2;
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x_hr &= image_subpixel_mask;
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y_hr &= image_subpixel_mask;
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fg_ptr = (const value_type*)base_type::source().span(x_lr, y_lr, 2);
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weight = (image_subpixel_scale - x_hr) *
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(image_subpixel_scale - y_hr);
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr;
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fg_ptr = (const value_type*)base_type::source().next_x();
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weight = x_hr * (image_subpixel_scale - y_hr);
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr;
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fg_ptr = (const value_type*)base_type::source().next_y();
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weight = (image_subpixel_scale - x_hr) * y_hr;
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr;
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fg_ptr = (const value_type*)base_type::source().next_x();
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weight = x_hr * y_hr;
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr;
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span->r = value_type(color_type::downshift(fg[order_type::R], image_subpixel_shift * 2));
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span->g = value_type(color_type::downshift(fg[order_type::G], image_subpixel_shift * 2));
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span->b = value_type(color_type::downshift(fg[order_type::B], image_subpixel_shift * 2));
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span->a = value_type(color_type::downshift(fg[order_type::A], image_subpixel_shift * 2));
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++span;
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++base_type::interpolator();
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} while(--len);
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}
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};
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//====================================span_image_filter_rgba_bilinear_clip
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template<class Source, class Interpolator>
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class span_image_filter_rgba_bilinear_clip :
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public span_image_filter<Source, Interpolator>
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{
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public:
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typedef Source source_type;
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typedef typename source_type::color_type color_type;
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typedef typename source_type::order_type order_type;
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typedef Interpolator interpolator_type;
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typedef span_image_filter<source_type, interpolator_type> base_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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typedef typename color_type::long_type long_type;
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//--------------------------------------------------------------------
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span_image_filter_rgba_bilinear_clip() {}
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span_image_filter_rgba_bilinear_clip(source_type& src,
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const color_type& back_color,
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interpolator_type& inter) :
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base_type(src, inter, 0),
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m_back_color(back_color)
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{}
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const color_type& background_color() const { return m_back_color; }
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void background_color(const color_type& v) { m_back_color = v; }
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//--------------------------------------------------------------------
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void generate(color_type* span, int x, int y, unsigned len)
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{
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base_type::interpolator().begin(x + base_type::filter_dx_dbl(),
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y + base_type::filter_dy_dbl(), len);
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long_type fg[4];
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value_type back_r = m_back_color.r;
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value_type back_g = m_back_color.g;
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value_type back_b = m_back_color.b;
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value_type back_a = m_back_color.a;
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const value_type *fg_ptr;
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int maxx = base_type::source().width() - 1;
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int maxy = base_type::source().height() - 1;
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do
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{
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int x_hr;
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int y_hr;
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base_type::interpolator().coordinates(&x_hr, &y_hr);
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x_hr -= base_type::filter_dx_int();
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y_hr -= base_type::filter_dy_int();
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int x_lr = x_hr >> image_subpixel_shift;
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int y_lr = y_hr >> image_subpixel_shift;
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unsigned weight;
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if(x_lr >= 0 && y_lr >= 0 &&
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x_lr < maxx && y_lr < maxy)
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{
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fg[0] = fg[1] = fg[2] = fg[3] = 0;
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x_hr &= image_subpixel_mask;
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y_hr &= image_subpixel_mask;
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fg_ptr = (const value_type*)
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base_type::source().row_ptr(y_lr) + (x_lr << 2);
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weight = (image_subpixel_scale - x_hr) *
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(image_subpixel_scale - y_hr);
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr++;
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weight = x_hr * (image_subpixel_scale - y_hr);
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr++;
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++y_lr;
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fg_ptr = (const value_type*)
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base_type::source().row_ptr(y_lr) + (x_lr << 2);
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weight = (image_subpixel_scale - x_hr) * y_hr;
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr++;
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weight = x_hr * y_hr;
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr++;
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fg[0] = color_type::downshift(fg[0], image_subpixel_shift * 2);
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fg[1] = color_type::downshift(fg[1], image_subpixel_shift * 2);
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fg[2] = color_type::downshift(fg[2], image_subpixel_shift * 2);
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fg[3] = color_type::downshift(fg[3], image_subpixel_shift * 2);
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}
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else
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{
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if(x_lr < -1 || y_lr < -1 ||
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x_lr > maxx || y_lr > maxy)
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{
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fg[order_type::R] = back_r;
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fg[order_type::G] = back_g;
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fg[order_type::B] = back_b;
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fg[order_type::A] = back_a;
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}
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else
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{
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fg[0] = fg[1] = fg[2] = fg[3] = 0;
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x_hr &= image_subpixel_mask;
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y_hr &= image_subpixel_mask;
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weight = (image_subpixel_scale - x_hr) *
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(image_subpixel_scale - y_hr);
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if(x_lr >= 0 && y_lr >= 0 &&
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x_lr <= maxx && y_lr <= maxy)
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{
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fg_ptr = (const value_type*)
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base_type::source().row_ptr(y_lr) + (x_lr << 2);
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr++;
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}
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else
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{
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fg[order_type::R] += back_r * weight;
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fg[order_type::G] += back_g * weight;
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fg[order_type::B] += back_b * weight;
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fg[order_type::A] += back_a * weight;
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}
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x_lr++;
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weight = x_hr * (image_subpixel_scale - y_hr);
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if(x_lr >= 0 && y_lr >= 0 &&
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x_lr <= maxx && y_lr <= maxy)
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{
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fg_ptr = (const value_type*)
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base_type::source().row_ptr(y_lr) + (x_lr << 2);
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr++;
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}
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else
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{
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fg[order_type::R] += back_r * weight;
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fg[order_type::G] += back_g * weight;
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fg[order_type::B] += back_b * weight;
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fg[order_type::A] += back_a * weight;
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}
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x_lr--;
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y_lr++;
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weight = (image_subpixel_scale - x_hr) * y_hr;
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if(x_lr >= 0 && y_lr >= 0 &&
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x_lr <= maxx && y_lr <= maxy)
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{
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fg_ptr = (const value_type*)
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base_type::source().row_ptr(y_lr) + (x_lr << 2);
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr++;
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}
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else
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{
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fg[order_type::R] += back_r * weight;
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fg[order_type::G] += back_g * weight;
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fg[order_type::B] += back_b * weight;
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fg[order_type::A] += back_a * weight;
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}
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x_lr++;
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weight = x_hr * y_hr;
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if(x_lr >= 0 && y_lr >= 0 &&
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x_lr <= maxx && y_lr <= maxy)
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{
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fg_ptr = (const value_type*)
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base_type::source().row_ptr(y_lr) + (x_lr << 2);
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr++;
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}
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else
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{
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fg[order_type::R] += back_r * weight;
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fg[order_type::G] += back_g * weight;
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fg[order_type::B] += back_b * weight;
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fg[order_type::A] += back_a * weight;
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}
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fg[0] = color_type::downshift(fg[0], image_subpixel_shift * 2);
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fg[1] = color_type::downshift(fg[1], image_subpixel_shift * 2);
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fg[2] = color_type::downshift(fg[2], image_subpixel_shift * 2);
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fg[3] = color_type::downshift(fg[3], image_subpixel_shift * 2);
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}
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}
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span->r = (value_type)fg[order_type::R];
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span->g = (value_type)fg[order_type::G];
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span->b = (value_type)fg[order_type::B];
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span->a = (value_type)fg[order_type::A];
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++span;
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++base_type::interpolator();
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} while(--len);
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}
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private:
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color_type m_back_color;
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};
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//==============================================span_image_filter_rgba_2x2
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template<class Source, class Interpolator>
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class span_image_filter_rgba_2x2 :
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public span_image_filter<Source, Interpolator>
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{
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public:
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typedef Source source_type;
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typedef typename source_type::color_type color_type;
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typedef typename source_type::order_type order_type;
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typedef Interpolator interpolator_type;
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typedef span_image_filter<source_type, interpolator_type> base_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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typedef typename color_type::long_type long_type;
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//--------------------------------------------------------------------
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span_image_filter_rgba_2x2() {}
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span_image_filter_rgba_2x2(source_type& src,
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interpolator_type& inter,
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image_filter_lut& filter) :
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base_type(src, inter, &filter)
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{}
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//--------------------------------------------------------------------
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void generate(color_type* span, int x, int y, unsigned len)
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{
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base_type::interpolator().begin(x + base_type::filter_dx_dbl(),
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y + base_type::filter_dy_dbl(), len);
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long_type fg[4];
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const value_type *fg_ptr;
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const int16* weight_array = base_type::filter().weight_array() +
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((base_type::filter().diameter()/2 - 1) <<
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image_subpixel_shift);
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do
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{
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int x_hr;
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int y_hr;
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base_type::interpolator().coordinates(&x_hr, &y_hr);
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x_hr -= base_type::filter_dx_int();
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y_hr -= base_type::filter_dy_int();
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int x_lr = x_hr >> image_subpixel_shift;
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int y_lr = y_hr >> image_subpixel_shift;
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unsigned weight;
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fg[0] = fg[1] = fg[2] = fg[3] = 0;
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x_hr &= image_subpixel_mask;
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y_hr &= image_subpixel_mask;
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fg_ptr = (const value_type*)base_type::source().span(x_lr, y_lr, 2);
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weight = (weight_array[x_hr + image_subpixel_scale] *
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weight_array[y_hr + image_subpixel_scale] +
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image_filter_scale / 2) >>
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image_filter_shift;
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr;
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fg_ptr = (const value_type*)base_type::source().next_x();
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weight = (weight_array[x_hr] *
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weight_array[y_hr + image_subpixel_scale] +
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image_filter_scale / 2) >>
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image_filter_shift;
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fg[0] += weight * *fg_ptr++;
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fg[1] += weight * *fg_ptr++;
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fg[2] += weight * *fg_ptr++;
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fg[3] += weight * *fg_ptr;
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|
|
|
fg_ptr = (const value_type*)base_type::source().next_y();
|
|
weight = (weight_array[x_hr + image_subpixel_scale] *
|
|
weight_array[y_hr] +
|
|
image_filter_scale / 2) >>
|
|
image_filter_shift;
|
|
fg[0] += weight * *fg_ptr++;
|
|
fg[1] += weight * *fg_ptr++;
|
|
fg[2] += weight * *fg_ptr++;
|
|
fg[3] += weight * *fg_ptr;
|
|
|
|
fg_ptr = (const value_type*)base_type::source().next_x();
|
|
weight = (weight_array[x_hr] *
|
|
weight_array[y_hr] +
|
|
image_filter_scale / 2) >>
|
|
image_filter_shift;
|
|
fg[0] += weight * *fg_ptr++;
|
|
fg[1] += weight * *fg_ptr++;
|
|
fg[2] += weight * *fg_ptr++;
|
|
fg[3] += weight * *fg_ptr;
|
|
|
|
fg[0] = color_type::downshift(fg[0], image_filter_shift);
|
|
fg[1] = color_type::downshift(fg[1], image_filter_shift);
|
|
fg[2] = color_type::downshift(fg[2], image_filter_shift);
|
|
fg[3] = color_type::downshift(fg[3], image_filter_shift);
|
|
|
|
if(fg[order_type::A] > color_type::full_value()) fg[order_type::A] = color_type::full_value();
|
|
if(fg[order_type::R] > fg[order_type::A]) fg[order_type::R] = fg[order_type::A];
|
|
if(fg[order_type::G] > fg[order_type::A]) fg[order_type::G] = fg[order_type::A];
|
|
if(fg[order_type::B] > fg[order_type::A]) fg[order_type::B] = fg[order_type::A];
|
|
|
|
span->r = (value_type)fg[order_type::R];
|
|
span->g = (value_type)fg[order_type::G];
|
|
span->b = (value_type)fg[order_type::B];
|
|
span->a = (value_type)fg[order_type::A];
|
|
++span;
|
|
++base_type::interpolator();
|
|
|
|
} while(--len);
|
|
}
|
|
};
|
|
|
|
|
|
|
|
//==================================================span_image_filter_rgba
|
|
template<class Source, class Interpolator>
|
|
class span_image_filter_rgba :
|
|
public span_image_filter<Source, Interpolator>
|
|
{
|
|
public:
|
|
typedef Source source_type;
|
|
typedef typename source_type::color_type color_type;
|
|
typedef typename source_type::order_type order_type;
|
|
typedef Interpolator interpolator_type;
|
|
typedef span_image_filter<source_type, interpolator_type> base_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;
|
|
|
|
//--------------------------------------------------------------------
|
|
span_image_filter_rgba() {}
|
|
span_image_filter_rgba(source_type& src,
|
|
interpolator_type& inter,
|
|
image_filter_lut& filter) :
|
|
base_type(src, inter, &filter)
|
|
{}
|
|
|
|
//--------------------------------------------------------------------
|
|
void generate(color_type* span, int x, int y, unsigned len)
|
|
{
|
|
base_type::interpolator().begin(x + base_type::filter_dx_dbl(),
|
|
y + base_type::filter_dy_dbl(), len);
|
|
|
|
long_type fg[4];
|
|
const value_type *fg_ptr;
|
|
|
|
unsigned diameter = base_type::filter().diameter();
|
|
int start = base_type::filter().start();
|
|
const int16* weight_array = base_type::filter().weight_array();
|
|
|
|
int x_count;
|
|
int weight_y;
|
|
|
|
do
|
|
{
|
|
base_type::interpolator().coordinates(&x, &y);
|
|
|
|
x -= base_type::filter_dx_int();
|
|
y -= base_type::filter_dy_int();
|
|
|
|
int x_hr = x;
|
|
int y_hr = y;
|
|
|
|
int x_lr = x_hr >> image_subpixel_shift;
|
|
int y_lr = y_hr >> image_subpixel_shift;
|
|
|
|
fg[0] = fg[1] = fg[2] = fg[3] = 0;
|
|
|
|
int x_fract = x_hr & image_subpixel_mask;
|
|
unsigned y_count = diameter;
|
|
|
|
y_hr = image_subpixel_mask - (y_hr & image_subpixel_mask);
|
|
fg_ptr = (const value_type*)base_type::source().span(x_lr + start,
|
|
y_lr + start,
|
|
diameter);
|
|
for(;;)
|
|
{
|
|
x_count = diameter;
|
|
weight_y = weight_array[y_hr];
|
|
x_hr = image_subpixel_mask - x_fract;
|
|
for(;;)
|
|
{
|
|
int weight = (weight_y * weight_array[x_hr] +
|
|
image_filter_scale / 2) >>
|
|
image_filter_shift;
|
|
|
|
fg[0] += weight * *fg_ptr++;
|
|
fg[1] += weight * *fg_ptr++;
|
|
fg[2] += weight * *fg_ptr++;
|
|
fg[3] += weight * *fg_ptr;
|
|
|
|
if(--x_count == 0) break;
|
|
x_hr += image_subpixel_scale;
|
|
fg_ptr = (const value_type*)base_type::source().next_x();
|
|
}
|
|
|
|
if(--y_count == 0) break;
|
|
y_hr += image_subpixel_scale;
|
|
fg_ptr = (const value_type*)base_type::source().next_y();
|
|
}
|
|
|
|
fg[0] = color_type::downshift(fg[0], image_filter_shift);
|
|
fg[1] = color_type::downshift(fg[1], image_filter_shift);
|
|
fg[2] = color_type::downshift(fg[2], image_filter_shift);
|
|
fg[3] = color_type::downshift(fg[3], image_filter_shift);
|
|
|
|
if(fg[0] < 0) fg[0] = 0;
|
|
if(fg[1] < 0) fg[1] = 0;
|
|
if(fg[2] < 0) fg[2] = 0;
|
|
if(fg[3] < 0) fg[3] = 0;
|
|
|
|
if(fg[order_type::A] > color_type::full_value()) fg[order_type::A] = color_type::full_value();
|
|
if(fg[order_type::R] > fg[order_type::A]) fg[order_type::R] = fg[order_type::A];
|
|
if(fg[order_type::G] > fg[order_type::A]) fg[order_type::G] = fg[order_type::A];
|
|
if(fg[order_type::B] > fg[order_type::A]) fg[order_type::B] = fg[order_type::A];
|
|
|
|
span->r = (value_type)fg[order_type::R];
|
|
span->g = (value_type)fg[order_type::G];
|
|
span->b = (value_type)fg[order_type::B];
|
|
span->a = (value_type)fg[order_type::A];
|
|
++span;
|
|
++base_type::interpolator();
|
|
|
|
} while(--len);
|
|
}
|
|
};
|
|
|
|
|
|
|
|
//========================================span_image_resample_rgba_affine
|
|
template<class Source>
|
|
class span_image_resample_rgba_affine :
|
|
public span_image_resample_affine<Source>
|
|
{
|
|
public:
|
|
typedef Source source_type;
|
|
typedef typename source_type::color_type color_type;
|
|
typedef typename source_type::order_type order_type;
|
|
typedef span_image_resample_affine<source_type> base_type;
|
|
typedef typename base_type::interpolator_type interpolator_type;
|
|
typedef typename color_type::value_type value_type;
|
|
typedef typename color_type::long_type long_type;
|
|
enum base_scale_e
|
|
{
|
|
downscale_shift = image_filter_shift
|
|
};
|
|
|
|
//--------------------------------------------------------------------
|
|
span_image_resample_rgba_affine() {}
|
|
span_image_resample_rgba_affine(source_type& src,
|
|
interpolator_type& inter,
|
|
image_filter_lut& filter) :
|
|
base_type(src, inter, filter)
|
|
{}
|
|
|
|
|
|
//--------------------------------------------------------------------
|
|
void generate(color_type* span, int x, int y, unsigned len)
|
|
{
|
|
base_type::interpolator().begin(x + base_type::filter_dx_dbl(),
|
|
y + base_type::filter_dy_dbl(), len);
|
|
|
|
long_type fg[4];
|
|
|
|
int diameter = base_type::filter().diameter();
|
|
int filter_scale = diameter << image_subpixel_shift;
|
|
int radius_x = (diameter * base_type::m_rx) >> 1;
|
|
int radius_y = (diameter * base_type::m_ry) >> 1;
|
|
int len_x_lr =
|
|
(diameter * base_type::m_rx + image_subpixel_mask) >>
|
|
image_subpixel_shift;
|
|
|
|
const int16* weight_array = base_type::filter().weight_array();
|
|
|
|
do
|
|
{
|
|
base_type::interpolator().coordinates(&x, &y);
|
|
|
|
x += base_type::filter_dx_int() - radius_x;
|
|
y += base_type::filter_dy_int() - radius_y;
|
|
|
|
fg[0] = fg[1] = fg[2] = fg[3] = 0;
|
|
|
|
int y_lr = y >> image_subpixel_shift;
|
|
int y_hr = ((image_subpixel_mask - (y & image_subpixel_mask)) *
|
|
base_type::m_ry_inv) >>
|
|
image_subpixel_shift;
|
|
int total_weight = 0;
|
|
int x_lr = x >> image_subpixel_shift;
|
|
int x_hr = ((image_subpixel_mask - (x & image_subpixel_mask)) *
|
|
base_type::m_rx_inv) >>
|
|
image_subpixel_shift;
|
|
|
|
int x_hr2 = x_hr;
|
|
const value_type* fg_ptr =
|
|
(const value_type*)base_type::source().span(x_lr, y_lr, len_x_lr);
|
|
for(;;)
|
|
{
|
|
int weight_y = weight_array[y_hr];
|
|
x_hr = x_hr2;
|
|
for(;;)
|
|
{
|
|
int weight = (weight_y * weight_array[x_hr] +
|
|
image_filter_scale / 2) >>
|
|
downscale_shift;
|
|
|
|
fg[0] += *fg_ptr++ * weight;
|
|
fg[1] += *fg_ptr++ * weight;
|
|
fg[2] += *fg_ptr++ * weight;
|
|
fg[3] += *fg_ptr++ * weight;
|
|
total_weight += weight;
|
|
x_hr += base_type::m_rx_inv;
|
|
if(x_hr >= filter_scale) break;
|
|
fg_ptr = (const value_type*)base_type::source().next_x();
|
|
}
|
|
y_hr += base_type::m_ry_inv;
|
|
if(y_hr >= filter_scale) break;
|
|
fg_ptr = (const value_type*)base_type::source().next_y();
|
|
}
|
|
|
|
fg[0] /= total_weight;
|
|
fg[1] /= total_weight;
|
|
fg[2] /= total_weight;
|
|
fg[3] /= total_weight;
|
|
|
|
if(fg[0] < 0) fg[0] = 0;
|
|
if(fg[1] < 0) fg[1] = 0;
|
|
if(fg[2] < 0) fg[2] = 0;
|
|
if(fg[3] < 0) fg[3] = 0;
|
|
|
|
if(fg[order_type::A] > color_type::full_value()) fg[order_type::A] = color_type::full_value();
|
|
if(fg[order_type::R] > fg[order_type::A]) fg[order_type::R] = fg[order_type::A];
|
|
if(fg[order_type::G] > fg[order_type::A]) fg[order_type::G] = fg[order_type::A];
|
|
if(fg[order_type::B] > fg[order_type::A]) fg[order_type::B] = fg[order_type::A];
|
|
|
|
span->r = (value_type)fg[order_type::R];
|
|
span->g = (value_type)fg[order_type::G];
|
|
span->b = (value_type)fg[order_type::B];
|
|
span->a = (value_type)fg[order_type::A];
|
|
|
|
++span;
|
|
++base_type::interpolator();
|
|
} while(--len);
|
|
}
|
|
};
|
|
|
|
|
|
|
|
//==============================================span_image_resample_rgba
|
|
template<class Source, class Interpolator>
|
|
class span_image_resample_rgba :
|
|
public span_image_resample<Source, Interpolator>
|
|
{
|
|
public:
|
|
typedef Source source_type;
|
|
typedef typename source_type::color_type color_type;
|
|
typedef typename source_type::order_type order_type;
|
|
typedef Interpolator interpolator_type;
|
|
typedef span_image_resample<source_type, interpolator_type> base_type;
|
|
typedef typename color_type::value_type value_type;
|
|
typedef typename color_type::long_type long_type;
|
|
enum base_scale_e
|
|
{
|
|
downscale_shift = image_filter_shift
|
|
};
|
|
|
|
//--------------------------------------------------------------------
|
|
span_image_resample_rgba() {}
|
|
span_image_resample_rgba(source_type& src,
|
|
interpolator_type& inter,
|
|
image_filter_lut& filter) :
|
|
base_type(src, inter, filter)
|
|
{}
|
|
|
|
//--------------------------------------------------------------------
|
|
void generate(color_type* span, int x, int y, unsigned len)
|
|
{
|
|
base_type::interpolator().begin(x + base_type::filter_dx_dbl(),
|
|
y + base_type::filter_dy_dbl(), len);
|
|
long_type fg[4];
|
|
|
|
int diameter = base_type::filter().diameter();
|
|
int filter_scale = diameter << image_subpixel_shift;
|
|
|
|
const int16* weight_array = base_type::filter().weight_array();
|
|
do
|
|
{
|
|
int rx;
|
|
int ry;
|
|
int rx_inv = image_subpixel_scale;
|
|
int ry_inv = image_subpixel_scale;
|
|
base_type::interpolator().coordinates(&x, &y);
|
|
base_type::interpolator().local_scale(&rx, &ry);
|
|
base_type::adjust_scale(&rx, &ry);
|
|
|
|
rx_inv = image_subpixel_scale * image_subpixel_scale / rx;
|
|
ry_inv = image_subpixel_scale * image_subpixel_scale / ry;
|
|
|
|
int radius_x = (diameter * rx) >> 1;
|
|
int radius_y = (diameter * ry) >> 1;
|
|
int len_x_lr =
|
|
(diameter * rx + image_subpixel_mask) >>
|
|
image_subpixel_shift;
|
|
|
|
x += base_type::filter_dx_int() - radius_x;
|
|
y += base_type::filter_dy_int() - radius_y;
|
|
|
|
fg[0] = fg[1] = fg[2] = fg[3] = 0;
|
|
|
|
int y_lr = y >> image_subpixel_shift;
|
|
int y_hr = ((image_subpixel_mask - (y & image_subpixel_mask)) *
|
|
ry_inv) >>
|
|
image_subpixel_shift;
|
|
int total_weight = 0;
|
|
int x_lr = x >> image_subpixel_shift;
|
|
int x_hr = ((image_subpixel_mask - (x & image_subpixel_mask)) *
|
|
rx_inv) >>
|
|
image_subpixel_shift;
|
|
int x_hr2 = x_hr;
|
|
const value_type* fg_ptr =
|
|
(const value_type*)base_type::source().span(x_lr, y_lr, len_x_lr);
|
|
|
|
for(;;)
|
|
{
|
|
int weight_y = weight_array[y_hr];
|
|
x_hr = x_hr2;
|
|
for(;;)
|
|
{
|
|
int weight = (weight_y * weight_array[x_hr] +
|
|
image_filter_scale / 2) >>
|
|
downscale_shift;
|
|
fg[0] += *fg_ptr++ * weight;
|
|
fg[1] += *fg_ptr++ * weight;
|
|
fg[2] += *fg_ptr++ * weight;
|
|
fg[3] += *fg_ptr++ * weight;
|
|
total_weight += weight;
|
|
x_hr += rx_inv;
|
|
if(x_hr >= filter_scale) break;
|
|
fg_ptr = (const value_type*)base_type::source().next_x();
|
|
}
|
|
y_hr += ry_inv;
|
|
if(y_hr >= filter_scale) break;
|
|
fg_ptr = (const value_type*)base_type::source().next_y();
|
|
}
|
|
|
|
fg[0] /= total_weight;
|
|
fg[1] /= total_weight;
|
|
fg[2] /= total_weight;
|
|
fg[3] /= total_weight;
|
|
|
|
if(fg[0] < 0) fg[0] = 0;
|
|
if(fg[1] < 0) fg[1] = 0;
|
|
if(fg[2] < 0) fg[2] = 0;
|
|
if(fg[3] < 0) fg[3] = 0;
|
|
|
|
if(fg[order_type::A] > color_type::full_value()) fg[order_type::A] = color_type::full_value();
|
|
if(fg[order_type::R] > fg[order_type::R]) fg[order_type::R] = fg[order_type::R];
|
|
if(fg[order_type::G] > fg[order_type::G]) fg[order_type::G] = fg[order_type::G];
|
|
if(fg[order_type::B] > fg[order_type::B]) fg[order_type::B] = fg[order_type::B];
|
|
|
|
span->r = (value_type)fg[order_type::R];
|
|
span->g = (value_type)fg[order_type::G];
|
|
span->b = (value_type)fg[order_type::B];
|
|
span->a = (value_type)fg[order_type::A];
|
|
|
|
++span;
|
|
++base_type::interpolator();
|
|
} while(--len);
|
|
}
|
|
};
|
|
|
|
|
|
}
|
|
|
|
|
|
#endif
|
|
|
|
|
|
|