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diff --git a/agg/inc/agg_span_pattern_resample_gray.h b/agg/inc/agg_span_pattern_resample_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
+//----------------------------------------------------------------------------
+
+#ifndef AGG_SPAN_PATTERN_RESAMPLE_GRAY_INCLUDED
+#define AGG_SPAN_PATTERN_RESAMPLE_GRAY_INCLUDED
+
+#include "agg_color_gray.h"
+#include "agg_span_image_resample.h"
+
+namespace agg
+{
+
+ //=======================================span_pattern_resample_gray_affine
+ template<class ColorT,
+ class WrapModeX,
+ class WrapModeY,
+ class Allocator = span_allocator<ColorT> >
+ class span_pattern_resample_gray_affine :
+ public span_image_resample_affine<ColorT, Allocator>
+ {
+ public:
+ typedef ColorT color_type;
+ typedef Allocator alloc_type;
+ typedef span_image_resample_affine<color_type, alloc_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_shift = color_type::base_shift,
+ base_mask = color_type::base_mask,
+ downscale_shift = image_filter_shift
+ };
+
+ //--------------------------------------------------------------------
+ span_pattern_resample_gray_affine(alloc_type& alloc) :
+ base_type(alloc),
+ m_wrap_mode_x(1),
+ m_wrap_mode_y(1)
+ {}
+
+ //--------------------------------------------------------------------
+ span_pattern_resample_gray_affine(alloc_type& alloc,
+ const rendering_buffer& src,
+ interpolator_type& inter,
+ const image_filter_lut& filter) :
+ base_type(alloc, src, color_type(0,0), inter, filter),
+ m_wrap_mode_x(src.width()),
+ m_wrap_mode_y(src.height())
+ {}
+
+ //--------------------------------------------------------------------
+ void source_image(const rendering_buffer& src)
+ {
+ base_type::source_image(src);
+ m_wrap_mode_x = WrapModeX(src.width());
+ m_wrap_mode_y = WrapModeX(src.height());
+ }
+
+ //--------------------------------------------------------------------
+ color_type* generate(int x, int y, unsigned len)
+ {
+ color_type* span = base_type::allocator().span();
+ interpolator_type& intr = base_type::interpolator();
+ intr.begin(x + base_type::filter_dx_dbl(),
+ y + base_type::filter_dy_dbl(), len);
+ long_type fg;
+
+ int diameter = base_type::filter().diameter();
+ int filter_size = diameter << image_subpixel_shift;
+ int radius_x = (diameter * base_type::m_rx) >> 1;
+ int radius_y = (diameter * base_type::m_ry) >> 1;
+ int maxx = base_type::source_image().width() - 1;
+ int maxy = base_type::source_image().height() - 1;
+ const int16* weight_array = base_type::filter().weight_array();
+
+ do
+ {
+ intr.coordinates(&x, &y);
+
+ x += base_type::filter_dx_int() - radius_x;
+ y += base_type::filter_dy_int() - radius_y;
+
+ fg = image_filter_size / 2;
+
+ int y_lr = m_wrap_mode_y(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_ini = x >> image_subpixel_shift;
+ int x_hr_ini = ((image_subpixel_mask - (x & image_subpixel_mask)) *
+ base_type::m_rx_inv) >>
+ image_subpixel_shift;
+ do
+ {
+ int weight_y = weight_array[y_hr];
+ int x_lr = m_wrap_mode_x(x_lr_ini);
+ int x_hr = x_hr_ini;
+ const value_type* row_ptr = (const value_type*)base_type::source_image().row(y_lr);
+ do
+ {
+ const value_type* fg_ptr = row_ptr + x_lr;
+ int weight = (weight_y * weight_array[x_hr] +
+ image_filter_size / 2) >>
+ downscale_shift;
+
+ fg += *fg_ptr * weight;
+ total_weight += weight;
+ x_hr += base_type::m_rx_inv;
+ x_lr = ++m_wrap_mode_x;
+ }
+ while(x_hr < filter_size);
+
+ y_hr += base_type::m_ry_inv;
+ y_lr = ++m_wrap_mode_y;
+ } while(y_hr < filter_size);
+
+ fg /= total_weight;
+
+ if(fg < 0) fg = 0;
+ if(fg > base_mask) fg = base_mask;
+
+ span->v = (value_type)fg;
+ span->a = (value_type)base_mask;
+
+ ++span;
+ ++intr;
+ } while(--len);
+ return base_type::allocator().span();
+ }
+
+ private:
+ WrapModeX m_wrap_mode_x;
+ WrapModeY m_wrap_mode_y;
+ };
+
+
+
+
+
+
+
+ //============================================span_pattern_resample_gray
+ template<class ColorT,
+ class Interpolator,
+ class WrapModeX,
+ class WrapModeY,
+ class Allocator = span_allocator<ColorT> >
+ class span_pattern_resample_gray :
+ public span_image_resample<ColorT, Interpolator, Allocator>
+ {
+ public:
+ typedef ColorT color_type;
+ typedef Interpolator interpolator_type;
+ typedef Allocator alloc_type;
+ typedef span_image_resample<color_type, interpolator_type, alloc_type> base_type;
+ typedef typename color_type::value_type value_type;
+ typedef typename color_type::long_type long_type;
+ enum
+ {
+ base_shift = color_type::base_shift,
+ base_mask = color_type::base_mask,
+ downscale_shift = image_filter_shift
+ };
+
+ //--------------------------------------------------------------------
+ span_pattern_resample_gray(alloc_type& alloc) :
+ base_type(alloc),
+ m_wrap_mode_x(1),
+ m_wrap_mode_y(1)
+ {}
+
+ //--------------------------------------------------------------------
+ span_pattern_resample_gray(alloc_type& alloc,
+ const rendering_buffer& src,
+ interpolator_type& inter,
+ const image_filter_lut& filter) :
+ base_type(alloc, src, color_type(0,0), inter, filter),
+ m_wrap_mode_x(src.width()),
+ m_wrap_mode_y(src.height())
+ {}
+
+ //--------------------------------------------------------------------
+ void source_image(const rendering_buffer& src)
+ {
+ base_type::source_image(src);
+ m_wrap_mode_x = WrapModeX(src.width());
+ m_wrap_mode_y = WrapModeX(src.height());
+ }
+
+ //--------------------------------------------------------------------
+ color_type* generate(int x, int y, unsigned len)
+ {
+ color_type* span = base_type::allocator().span();
+ interpolator_type& intr = base_type::interpolator();
+ intr.begin(x + base_type::filter_dx_dbl(),
+ y + base_type::filter_dy_dbl(), len);
+ long_type fg;
+
+ int diameter = base_type::filter().diameter();
+ int filter_size = diameter << image_subpixel_shift;
+ const int16* weight_array = base_type::filter().weight_array();
+
+ do
+ {
+ int rx;
+ int ry;
+ int rx_inv = image_subpixel_size;
+ int ry_inv = image_subpixel_size;
+ intr.coordinates(&x, &y);
+ intr.local_scale(&rx, &ry);
+
+ rx = (rx * base_type::m_blur_x) >> image_subpixel_shift;
+ ry = (ry * base_type::m_blur_y) >> image_subpixel_shift;
+
+ if(rx < image_subpixel_size)
+ {
+ rx = image_subpixel_size;
+ }
+ else
+ {
+ if(rx > image_subpixel_size * base_type::m_scale_limit)
+ {
+ rx = image_subpixel_size * base_type::m_scale_limit;
+ }
+ rx_inv = image_subpixel_size * image_subpixel_size / rx;
+ }
+
+ if(ry < image_subpixel_size)
+ {
+ ry = image_subpixel_size;
+ }
+ else
+ {
+ if(ry > image_subpixel_size * base_type::m_scale_limit)
+ {
+ ry = image_subpixel_size * base_type::m_scale_limit;
+ }
+ ry_inv = image_subpixel_size * image_subpixel_size / ry;
+ }
+
+ int radius_x = (diameter * rx) >> 1;
+ int radius_y = (diameter * ry) >> 1;
+ int maxx = base_type::source_image().width() - 1;
+ int maxy = base_type::source_image().height() - 1;
+
+ x += base_type::filter_dx_int() - radius_x;
+ y += base_type::filter_dy_int() - radius_y;
+
+ fg = image_filter_size / 2;
+
+ int y_lr = m_wrap_mode_y(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_ini = x >> image_subpixel_shift;
+ int x_hr_ini = ((image_subpixel_mask - (x & image_subpixel_mask)) *
+ rx_inv) >>
+ image_subpixel_shift;
+
+ do
+ {
+ int weight_y = weight_array[y_hr];
+ int x_lr = m_wrap_mode_x(x_lr_ini);
+ int x_hr = x_hr_ini;
+ const value_type* row_ptr = (const value_type*)base_type::source_image().row(y_lr);
+ do
+ {
+ const value_type* fg_ptr = row_ptr + x_lr;
+ int weight = (weight_y * weight_array[x_hr] +
+ image_filter_size / 2) >>
+ downscale_shift;
+ fg += *fg_ptr * weight;
+ total_weight += weight;
+ x_hr += rx_inv;
+ x_lr = ++m_wrap_mode_x;
+ }
+ while(x_hr < filter_size);
+ y_hr += ry_inv;
+ y_lr = ++m_wrap_mode_y;
+ }
+ while(y_hr < filter_size);
+
+ fg /= total_weight;
+
+ if(fg < 0) fg = 0;
+ if(fg > base_mask) fg = base_mask;
+
+ span->v = (value_type)fg;
+ span->a = (value_type)base_mask;
+
+ ++span;
+ ++intr;
+ } while(--len);
+ return base_type::allocator().span();
+ }
+
+ private:
+ WrapModeX m_wrap_mode_x;
+ WrapModeY m_wrap_mode_y;
+ };
+
+}
+
+
+#endif