mirror of
https://github.com/processing/processing4.git
synced 2026-02-03 21:59:20 +01:00
321 lines
12 KiB
C++
321 lines
12 KiB
C++
//----------------------------------------------------------------------------
|
|
// 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_scale_e
|
|
{
|
|
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 = WrapModeY(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_scale_e
|
|
{
|
|
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 = WrapModeY(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
|