1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
|
//----------------------------------------------------------------------------
// 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
//----------------------------------------------------------------------------
//
// Image transformations with filtering. Span generator base class
//
//----------------------------------------------------------------------------
#ifndef AGG_SPAN_IMAGE_FILTER_INCLUDED
#define AGG_SPAN_IMAGE_FILTER_INCLUDED
#include "agg_basics.h"
#include "agg_image_filters.h"
#include "agg_rendering_buffer.h"
#include "agg_span_generator.h"
namespace agg
{
//--------------------------------------------------span_image_filter
template<class ColorT, class Interpolator, class Allocator>
class span_image_filter : public span_generator<ColorT, Allocator>
{
public:
typedef ColorT color_type;
typedef Allocator alloc_type;
typedef Interpolator interpolator_type;
typedef span_generator<color_type, alloc_type> base_type;
//----------------------------------------------------------------
span_image_filter(alloc_type& alloc) :
span_generator<color_type, alloc_type>(alloc)
{}
//----------------------------------------------------------------
span_image_filter(alloc_type& alloc,
const rendering_buffer& src,
const color_type& back_color,
interpolator_type& interpolator_,
const image_filter_lut* filter_) :
span_generator<color_type, alloc_type>(alloc),
m_src(&src),
m_back_color(back_color),
m_interpolator(&interpolator_),
m_filter(filter_),
m_dx_dbl(0.5),
m_dy_dbl(0.5),
m_dx_int(image_subpixel_size / 2),
m_dy_int(image_subpixel_size / 2)
{}
//----------------------------------------------------------------
const rendering_buffer& source_image() const { return *m_src; }
const color_type& background_color() const { return m_back_color; }
const image_filter_lut& filter() const { return *m_filter; }
int filter_dx_int() const { return m_dx_int; }
int filter_dy_int() const { return m_dy_int; }
double filter_dx_dbl() const { return m_dx_dbl; }
double filter_dy_dbl() const { return m_dy_dbl; }
//----------------------------------------------------------------
void source_image(const rendering_buffer& v) { m_src = &v; }
void background_color(const color_type& v) { m_back_color = v; }
void interpolator(interpolator_type& v) { m_interpolator = &v; }
void filter(const image_filter_lut& v) { m_filter = &v; }
void filter_offset(double dx, double dy)
{
m_dx_dbl = dx;
m_dy_dbl = dy;
m_dx_int = int(dx * image_subpixel_size);
m_dy_int = int(dy * image_subpixel_size);
}
void filter_offset(double d) { filter_offset(d, d); }
//----------------------------------------------------------------
interpolator_type& interpolator() { return *m_interpolator; }
//--------------------------------------------------------------------
void prepare(unsigned max_span_len)
{
base_type::prepare(max_span_len);
}
//----------------------------------------------------------------
private:
const rendering_buffer* m_src;
color_type m_back_color;
interpolator_type* m_interpolator;
const image_filter_lut* m_filter;
double m_dx_dbl;
double m_dy_dbl;
unsigned m_dx_int;
unsigned m_dy_int;
};
}
#endif
|
