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diff --git a/agg/inc/agg_span_image_filter_gray.h b/agg/inc/agg_span_image_filter_gray.h
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+++ b/agg/inc/agg_span_image_filter_gray.h
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+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.3
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software
+// is granted provided this copyright notice appears in all copies.
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// 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_SPAN_IMAGE_FILTER_GRAY_INCLUDED
+#define AGG_SPAN_IMAGE_FILTER_GRAY_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_color_gray.h"
+#include "agg_span_image_filter.h"
+
+
+namespace agg
+{
+
+
+ //==============================================span_image_filter_gray_nn
+ template<class ColorT,
+ class Interpolator,
+ class Allocator = span_allocator<ColorT> >
+ class span_image_filter_gray_nn :
+ public span_image_filter<ColorT, Interpolator, Allocator>
+ {
+ public:
+ typedef ColorT color_type;
+ typedef Interpolator interpolator_type;
+ typedef Allocator alloc_type;
+ typedef span_image_filter<color_type, interpolator_type, alloc_type> base_type;
+ typedef typename color_type::value_type value_type;
+ typedef typename color_type::calc_type calc_type;
+ enum
+ {
+ base_shift = color_type::base_shift,
+ base_mask = color_type::base_mask
+ };
+
+ //--------------------------------------------------------------------
+ span_image_filter_gray_nn(alloc_type& alloc) : base_type(alloc) {}
+
+ //--------------------------------------------------------------------
+ span_image_filter_gray_nn(alloc_type& alloc,
+ const rendering_buffer& src,
+ const color_type& back_color,
+ interpolator_type& inter) :
+ base_type(alloc, src, back_color, inter, 0)
+ {}
+
+ //--------------------------------------------------------------------
+ color_type* generate(int x, int y, unsigned len)
+ {
+ base_type::interpolator().begin(x + base_type::filter_dx_dbl(),
+ y + base_type::filter_dy_dbl(), len);
+
+ calc_type fg;
+ calc_type src_alpha;
+
+ color_type* span = base_type::allocator().span();
+
+ int maxx = base_type::source_image().width() - 1;
+ int maxy = base_type::source_image().height() - 1;
+
+ do
+ {
+ base_type::interpolator().coordinates(&x, &y);
+
+ x >>= image_subpixel_shift;
+ y >>= image_subpixel_shift;
+
+ if(x >= 0 && y >= 0 &&
+ x <= maxx && y <= maxy)
+ {
+ fg = *((const value_type*)base_type::source_image().row(y) + x);
+ src_alpha = base_mask;
+ }
+ else
+ {
+ fg = base_type::background_color().v;
+ src_alpha = base_type::background_color().a;
+ }
+
+ span->v = (value_type)fg;
+ span->a = (value_type)src_alpha;
+ ++span;
+ ++base_type::interpolator();
+
+ } while(--len);
+
+ return base_type::allocator().span();
+ }
+ };
+
+
+
+
+ //========================================span_image_filter_gray_bilinear
+ template<class ColorT,
+ class Interpolator,
+ class Allocator = span_allocator<ColorT> >
+ class span_image_filter_gray_bilinear :
+ public span_image_filter<ColorT, Interpolator, Allocator>
+ {
+ public:
+ typedef ColorT color_type;
+ typedef Interpolator interpolator_type;
+ typedef Allocator alloc_type;
+ typedef span_image_filter<color_type, interpolator_type, alloc_type> base_type;
+ typedef typename color_type::value_type value_type;
+ typedef typename color_type::calc_type calc_type;
+ enum
+ {
+ base_shift = color_type::base_shift,
+ base_mask = color_type::base_mask
+ };
+
+ //--------------------------------------------------------------------
+ span_image_filter_gray_bilinear(alloc_type& alloc) : base_type(alloc) {}
+
+ //--------------------------------------------------------------------
+ span_image_filter_gray_bilinear(alloc_type& alloc,
+ const rendering_buffer& src,
+ const color_type& back_color,
+ interpolator_type& inter) :
+ base_type(alloc, src, back_color, inter, 0)
+ {}
+
+ //--------------------------------------------------------------------
+ color_type* generate(int x, int y, unsigned len)
+ {
+ base_type::interpolator().begin(x + base_type::filter_dx_dbl(),
+ y + base_type::filter_dy_dbl(), len);
+ calc_type fg;
+ calc_type src_alpha;
+ value_type back_v = base_type::background_color().v;
+ value_type back_a = base_type::background_color().a;
+
+ const value_type *fg_ptr;
+
+ color_type* span = base_type::allocator().span();
+
+ int maxx = base_type::source_image().width() - 1;
+ int maxy = base_type::source_image().height() - 1;
+
+ do
+ {
+ int x_hr;
+ int y_hr;
+
+ base_type::interpolator().coordinates(&x_hr, &y_hr);
+
+ x_hr -= base_type::filter_dx_int();
+ y_hr -= base_type::filter_dy_int();
+
+ int x_lr = x_hr >> image_subpixel_shift;
+ int y_lr = y_hr >> image_subpixel_shift;
+
+ if(x_lr >= 0 && y_lr >= 0 &&
+ x_lr < maxx && y_lr < maxy)
+ {
+ fg = image_subpixel_size * image_subpixel_size / 2;
+
+ x_hr &= image_subpixel_mask;
+ y_hr &= image_subpixel_mask;
+ fg_ptr = (const value_type*)base_type::source_image().row(y_lr) + x_lr;
+
+ fg += *fg_ptr++ * (image_subpixel_size - x_hr) * (image_subpixel_size - y_hr);
+ fg += *fg_ptr++ * (image_subpixel_size - y_hr) * x_hr;
+
+ fg_ptr = (const value_type*)base_type::source_image().next_row(fg_ptr - 2);
+
+ fg += *fg_ptr++ * (image_subpixel_size - x_hr) * y_hr;
+ fg += *fg_ptr++ * x_hr * y_hr;
+
+ fg >>= image_subpixel_shift * 2;
+ src_alpha = base_mask;
+ }
+ else
+ {
+ unsigned weight;
+ if(x_lr < -1 || y_lr < -1 ||
+ x_lr > maxx || y_lr > maxy)
+ {
+ fg = back_v;
+ src_alpha = back_a;
+ }
+ else
+ {
+ fg =
+ src_alpha = image_subpixel_size * image_subpixel_size / 2;
+
+ x_hr &= image_subpixel_mask;
+ y_hr &= image_subpixel_mask;
+
+ weight = (image_subpixel_size - x_hr) *
+ (image_subpixel_size - y_hr);
+ if(x_lr >= 0 && y_lr >= 0 &&
+ x_lr <= maxx && y_lr <= maxy)
+ {
+ fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr);
+ src_alpha += weight * base_mask;
+ }
+ else
+ {
+ fg += back_v * weight;
+ src_alpha += back_a * weight;
+ }
+
+ x_lr++;
+
+ weight = x_hr * (image_subpixel_size - y_hr);
+ if(x_lr >= 0 && y_lr >= 0 &&
+ x_lr <= maxx && y_lr <= maxy)
+ {
+ fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr);
+ src_alpha += weight * base_mask;
+ }
+ else
+ {
+ fg += back_v * weight;
+ src_alpha += back_a * weight;
+ }
+
+ x_lr--;
+ y_lr++;
+
+ weight = (image_subpixel_size - x_hr) * y_hr;
+ if(x_lr >= 0 && y_lr >= 0 &&
+ x_lr <= maxx && y_lr <= maxy)
+ {
+ fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr);
+ src_alpha += weight * base_mask;
+ }
+ else
+ {
+ fg += back_v * weight;
+ src_alpha += back_a * weight;
+ }
+
+ x_lr++;
+
+ weight = x_hr * y_hr;
+ if(x_lr >= 0 && y_lr >= 0 &&
+ x_lr <= maxx && y_lr <= maxy)
+ {
+ fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr);
+ src_alpha += weight * base_mask;
+ }
+ else
+ {
+ fg += back_v * weight;
+ src_alpha += back_a * weight;
+ }
+
+ fg >>= image_subpixel_shift * 2;
+ src_alpha >>= image_subpixel_shift * 2;
+ }
+ }
+
+ span->v = (value_type)fg;
+ span->a = (value_type)src_alpha;
+ ++span;
+ ++base_type::interpolator();
+
+ } while(--len);
+
+ return base_type::allocator().span();
+ }
+ };
+
+
+
+
+
+
+
+ //========================================span_image_filter_gray_2x2
+ template<class ColorT,
+ class Interpolator,
+ class Allocator = span_allocator<ColorT> >
+ class span_image_filter_gray_2x2 :
+ public span_image_filter<ColorT, Interpolator, Allocator>
+ {
+ public:
+ typedef ColorT color_type;
+ typedef Interpolator interpolator_type;
+ typedef Allocator alloc_type;
+ typedef span_image_filter<color_type, interpolator_type, alloc_type> base_type;
+ typedef typename color_type::value_type value_type;
+ typedef typename color_type::calc_type calc_type;
+ enum
+ {
+ base_shift = color_type::base_shift,
+ base_mask = color_type::base_mask
+ };
+
+ //--------------------------------------------------------------------
+ span_image_filter_gray_2x2(alloc_type& alloc) : base_type(alloc) {}
+
+ //--------------------------------------------------------------------
+ span_image_filter_gray_2x2(alloc_type& alloc,
+ const rendering_buffer& src,
+ const color_type& back_color,
+ interpolator_type& inter,
+ const image_filter_lut& filter) :
+ base_type(alloc, src, back_color, inter, &filter)
+ {}
+
+ //--------------------------------------------------------------------
+ color_type* generate(int x, int y, unsigned len)
+ {
+ base_type::interpolator().begin(x + base_type::filter_dx_dbl(),
+ y + base_type::filter_dy_dbl(), len);
+ calc_type fg;
+ calc_type src_alpha;
+ value_type back_v = base_type::background_color().v;
+ value_type back_a = base_type::background_color().a;
+
+ const value_type *fg_ptr;
+
+ color_type* span = base_type::allocator().span();
+ const int16* weight_array = base_type::filter().weight_array() +
+ ((base_type::filter().diameter()/2 - 1) <<
+ image_subpixel_shift);
+
+ int maxx = base_type::source_image().width() - 1;
+ int maxy = base_type::source_image().height() - 1;
+
+ do
+ {
+ int x_hr;
+ int y_hr;
+
+ base_type::interpolator().coordinates(&x_hr, &y_hr);
+
+ x_hr -= base_type::filter_dx_int();
+ y_hr -= base_type::filter_dy_int();
+
+ int x_lr = x_hr >> image_subpixel_shift;
+ int y_lr = y_hr >> image_subpixel_shift;
+
+ if(x_lr >= 0 && y_lr >= 0 &&
+ x_lr < maxx && y_lr < maxy)
+ {
+ fg = image_filter_size / 2;
+
+ x_hr &= image_subpixel_mask;
+ y_hr &= image_subpixel_mask;
+ fg_ptr = (const value_type*)base_type::source_image().row(y_lr) + x_lr;
+
+ fg += *fg_ptr++ * ((weight_array[x_hr + image_subpixel_size] *
+ weight_array[y_hr + image_subpixel_size] +
+ image_filter_size / 2) >>
+ image_filter_shift);
+ fg += *fg_ptr++ * ((weight_array[x_hr] *
+ weight_array[y_hr + image_subpixel_size] +
+ image_filter_size / 2) >>
+ image_filter_shift);
+
+ fg_ptr = (const value_type*)base_type::source_image().next_row(fg_ptr - 2);
+
+ fg += *fg_ptr++ * ((weight_array[x_hr + image_subpixel_size] *
+ weight_array[y_hr] +
+ image_filter_size / 2) >>
+ image_filter_shift);
+ fg += *fg_ptr++ * ((weight_array[x_hr] *
+ weight_array[y_hr] +
+ image_filter_size / 2) >>
+ image_filter_shift);
+
+ fg >>= image_filter_shift;
+ if(fg > base_mask) fg = base_mask;
+ src_alpha = base_mask;
+ }
+ else
+ {
+ unsigned weight;
+ if(x_lr < -1 || y_lr < -1 ||
+ x_lr > maxx || y_lr > maxy)
+ {
+ fg = back_v;
+ src_alpha = back_a;
+ }
+ else
+ {
+ fg = src_alpha = image_filter_size / 2;
+
+ x_hr &= image_subpixel_mask;
+ y_hr &= image_subpixel_mask;
+
+ weight = (weight_array[x_hr + image_subpixel_size] *
+ weight_array[y_hr + image_subpixel_size] +
+ image_filter_size / 2) >>
+ image_filter_shift;
+ if(x_lr >= 0 && y_lr >= 0 &&
+ x_lr <= maxx && y_lr <= maxy)
+ {
+ fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr);
+ src_alpha += weight * base_mask;
+ }
+ else
+ {
+ fg += back_v * weight;
+ src_alpha += back_a * weight;
+ }
+
+ x_lr++;
+
+ weight = (weight_array[x_hr] *
+ weight_array[y_hr + image_subpixel_size] +
+ image_filter_size / 2) >>
+ image_filter_shift;
+ if(x_lr >= 0 && y_lr >= 0 &&
+ x_lr <= maxx && y_lr <= maxy)
+ {
+ fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr);
+ src_alpha += weight * base_mask;
+ }
+ else
+ {
+ fg += back_v * weight;
+ src_alpha += back_a * weight;
+ }
+
+ x_lr--;
+ y_lr++;
+
+ weight = (weight_array[x_hr + image_subpixel_size] *
+ weight_array[y_hr] +
+ image_filter_size / 2) >>
+ image_filter_shift;
+ if(x_lr >= 0 && y_lr >= 0 &&
+ x_lr <= maxx && y_lr <= maxy)
+ {
+ fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr);
+ src_alpha += weight * base_mask;
+ }
+ else
+ {
+ fg += back_v * weight;
+ src_alpha += back_a * weight;
+ }
+
+ x_lr++;
+
+ weight = (weight_array[x_hr] *
+ weight_array[y_hr] +
+ image_filter_size / 2) >>
+ image_filter_shift;
+ if(x_lr >= 0 && y_lr >= 0 &&
+ x_lr <= maxx && y_lr <= maxy)
+ {
+ fg += weight * *((const value_type*)base_type::source_image().row(y_lr) + x_lr);
+ src_alpha += weight * base_mask;
+ }
+ else
+ {
+ fg += back_v * weight;
+ src_alpha += back_a * weight;
+ }
+ fg >>= image_filter_shift;
+ src_alpha >>= image_filter_shift;
+
+ if(src_alpha > base_mask) src_alpha = base_mask;
+ if(fg > src_alpha) fg = src_alpha;
+
+ }
+ }
+
+ span->v = (value_type)fg;
+ span->a = (value_type)src_alpha;
+ ++span;
+ ++base_type::interpolator();
+
+ } while(--len);
+
+ return base_type::allocator().span();
+ }
+ };
+
+
+
+
+
+
+
+
+
+
+
+
+ //================================================span_image_filter_gray
+ template<class ColorT,
+ class Interpolator,
+ class Allocator = span_allocator<ColorT> >
+ class span_image_filter_gray :
+ public span_image_filter<ColorT, Interpolator, Allocator>
+ {
+ public:
+ typedef ColorT color_type;
+ typedef Interpolator interpolator_type;
+ typedef Allocator alloc_type;
+ typedef span_image_filter<color_type, interpolator_type, alloc_type> base_type;
+ typedef typename color_type::value_type value_type;
+ typedef typename color_type::calc_type calc_type;
+ enum
+ {
+ base_shift = color_type::base_shift,
+ base_mask = color_type::base_mask
+ };
+
+ //--------------------------------------------------------------------
+ span_image_filter_gray(alloc_type& alloc) : base_type(alloc) {}
+
+ //--------------------------------------------------------------------
+ span_image_filter_gray(alloc_type& alloc,
+ const rendering_buffer& src,
+ const color_type& back_color,
+ interpolator_type& inter,
+ const image_filter_lut& filter) :
+ base_type(alloc, src, back_color, inter, &filter)
+ {}
+
+ //--------------------------------------------------------------------
+ color_type* generate(int x, int y, unsigned len)
+ {
+ base_type::interpolator().begin(x + base_type::filter_dx_dbl(),
+ y + base_type::filter_dy_dbl(), len);
+
+ int fg;
+ int src_alpha;
+ value_type back_v = base_type::background_color().v;
+ value_type back_a = base_type::background_color().a;
+
+ const value_type* fg_ptr;
+
+ unsigned diameter = base_type::filter().diameter();
+ int start = base_type::filter().start();
+ int start1 = start - 1;
+ const int16* weight_array = base_type::filter().weight_array();
+
+ color_type* span = base_type::allocator().span();
+
+ int maxx = base_type::source_image().width() + start - 2;
+ int maxy = base_type::source_image().height() + start - 2;
+
+ int maxx2 = base_type::source_image().width() - start - 1;
+ int maxy2 = base_type::source_image().height() - start - 1;
+
+ 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 = image_filter_size / 2;
+
+ int x_fract = x_hr & image_subpixel_mask;
+ unsigned y_count = diameter;
+
+ if(x_lr >= -start && y_lr >= -start &&
+ x_lr <= maxx && y_lr <= maxy)
+ {
+ y_hr = image_subpixel_mask - (y_hr & image_subpixel_mask);
+ fg_ptr = (const value_type*)base_type::source_image().row(y_lr + start) + x_lr + start;
+ do
+ {
+ x_count = diameter;
+ weight_y = weight_array[y_hr];
+ x_hr = image_subpixel_mask - x_fract;
+
+ do
+ {
+ fg += *fg_ptr++ * ((weight_y * weight_array[x_hr] +
+ image_filter_size / 2) >>
+ image_filter_shift);
+ x_hr += image_subpixel_size;
+
+ } while(--x_count);
+
+ y_hr += image_subpixel_size;
+ fg_ptr = (const value_type*)base_type::source_image().next_row(fg_ptr - diameter);
+
+ } while(--y_count);
+
+ fg >>= image_filter_shift;
+
+ if(fg < 0) fg = 0;
+ if(fg > base_mask) fg = base_mask;
+ src_alpha = base_mask;
+ }
+ else
+ {
+ if(x_lr < start1 || y_lr < start1 ||
+ x_lr > maxx2 || y_lr > maxy2)
+ {
+ fg = back_v;
+ src_alpha = back_a;
+ }
+ else
+ {
+ src_alpha = image_filter_size / 2;
+ y_lr = (y >> image_subpixel_shift) + start;
+ y_hr = image_subpixel_mask - (y_hr & image_subpixel_mask);
+
+ do
+ {
+ x_count = diameter;
+ weight_y = weight_array[y_hr];
+ x_lr = (x >> image_subpixel_shift) + start;
+ x_hr = image_subpixel_mask - x_fract;
+
+ do
+ {
+ int weight = (weight_y * weight_array[x_hr] +
+ image_filter_size / 2) >>
+ image_filter_shift;
+
+ if(x_lr >= 0 && y_lr >= 0 &&
+ x_lr < int(base_type::source_image().width()) &&
+ y_lr < int(base_type::source_image().height()))
+ {
+ fg_ptr = (const value_type*)base_type::source_image().row(y_lr) + x_lr;
+ fg += *fg_ptr++ * weight;
+ src_alpha += base_mask * weight;
+ }
+ else
+ {
+ fg += back_v * weight;
+ src_alpha += back_a * weight;
+ }
+ x_hr += image_subpixel_size;
+ x_lr++;
+
+ } while(--x_count);
+
+ y_hr += image_subpixel_size;
+ y_lr++;
+
+ } while(--y_count);
+
+
+ fg >>= image_filter_shift;
+ src_alpha >>= image_filter_shift;
+
+ if(fg < 0) fg = 0;
+ if(src_alpha < 0) src_alpha = 0;
+
+ if(src_alpha > base_mask) src_alpha = base_mask;
+ if(fg > src_alpha) fg = src_alpha;
+ }
+ }
+
+ span->v = (value_type)fg;
+ span->a = (value_type)src_alpha;
+
+ ++span;
+ ++base_type::interpolator();
+
+ } while(--len);
+
+ return base_type::allocator().span();
+ }
+ };
+
+
+
+}
+
+
+#endif
+
+
+
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