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TextCanvas.hpp
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TextCanvas.hpp
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// TextCanvas.hpp --- TextCanvas by katahiromz
///////////////////////////////////////////////////////////////////////////
#ifndef TEXT_CANVAS_HPP_
#define TEXT_CANVAS_HPP_ 33 // Version 33
#if _MSC_VER > 1000
#pragma once
#endif
#include <algorithm> // for std::swap
#include <cassert> // for assert macro
#include <cmath> // for std::sqrt, std::atan2, std::fmod, ...
#include <cstring> // for std::memset, std::memcpy, ...
#include <set> // for std::set
#include <string> // for std::string
#include <vector> // for std::vector
#if __cplusplus >= 201103L
#include <cstdint> // uint8_t, uint16_t, ...
#else
#include "pstdint.h" // uint8_t, uint16_t, ...
#endif
#include "japanese.hpp"
#define TEXTCANVAS_NO_N88_FONTS
#define TEXTCANVAS_NO_QBASIC_FONTS
///////////////////////////////////////////////////////////////////////////
namespace textcanvas {
typedef std::string string_type;
typedef string_type::value_type char_type;
typedef char_type color_t;
typedef std::ptrdiff_t coord_t;
#ifdef M_PI
static const double pi = M_PI;
#else
static const double pi = 3.14159265358979323846;
#endif
static const double epsilon = 0.00001;
static const color_t zero = color_t(0);
static const color_t one = color_t(1);
static const color_t space = color_t(' ');
static const color_t newline = color_t('\n');
static const color_t asterisk = color_t('*');
static const color_t sharp = color_t('#');
///////////////////////////////////////////////////////////////////////////
struct Point;
class XbmImage;
class XbmFont;
class TextCanvas;
///////////////////////////////////////////////////////////////////////////
// Point and Points
struct Point
{
coord_t x, y;
Point() {}
Point(coord_t x_, coord_t y_)
: x(x_)
, y(y_)
{}
};
typedef Point Size;
typedef std::vector<Point> Points;
inline bool
operator==(const Point& p0, const Point& p1)
{
return p0.x == p1.x && p0.y == p1.y;
}
inline bool
operator!=(const Point& p0, const Point& p1)
{
return p0.x != p1.x || p0.y != p1.y;
}
struct point_less
{
inline bool operator()(const Point& p0, const Point& p1) const
{
if (p0.x < p1.x)
return true;
return p0.x == p1.x && p0.y < p1.y;
}
};
///////////////////////////////////////////////////////////////////////////
// functions
inline coord_t
do_round(double d)
{
return coord_t(d + 0.5);
}
double
normalize_radian(double radian);
bool
get_polygon_box(Point& p0, Point& p1, size_t num_points, const Point* points);
size_t
crossing_number(const Point& p, const Points& points);
coord_t
winding_number(const Point& p, const Points& points);
bool
check_range(double at, bool clockwise, double a0, double a1);
///////////////////////////////////////////////////////////////////////////
// XbmImage
class XbmImage
{
public:
typedef uint8_t value_type;
XbmImage(coord_t width,
coord_t height,
const void* data = NULL,
void* alloc = NULL)
: m_data(NULL)
, m_alloc(NULL)
{
reset(width, height, data, alloc);
}
XbmImage(const XbmImage& image)
: m_data(NULL)
, m_alloc(NULL)
{
*this = image;
}
XbmImage& operator=(const XbmImage& image);
virtual ~XbmImage() { clear(); }
void clear()
{
delete[] m_alloc;
m_alloc = NULL;
}
void reset(coord_t width,
coord_t height,
const void* data = NULL,
void* alloc = NULL);
value_type* cast(const void* data) const
{
return reinterpret_cast<value_type*>(const_cast<void*>(data));
}
coord_t width() const { return m_width; }
coord_t height() const { return m_height; }
coord_t stride() const { return m_stride; }
coord_t size() const { return stride() * height(); }
value_type* data() { return m_data; }
const value_type* data() const { return m_data; }
bool in_range(coord_t x, coord_t y) const;
bool get_dot(coord_t x, coord_t y) const;
void put_dot(coord_t x, coord_t y, bool dot);
std::string to_str(const char* name) const;
void get_subimage(TextCanvas& image,
coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1) const;
void get_subimage(XbmImage& image,
coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1) const;
void put_subimage(coord_t x0, coord_t y0, const TextCanvas& image);
void put_subimage(coord_t x0, coord_t y0, const XbmImage& image);
protected:
value_type* m_data;
value_type* m_alloc;
coord_t m_width;
coord_t m_height;
coord_t m_stride;
};
///////////////////////////////////////////////////////////////////////////
// XbmFont
class XbmFont : public XbmImage
{
public:
XbmFont(coord_t width,
coord_t height,
const void* data,
coord_t columns,
coord_t rows,
coord_t cell_width,
coord_t cell_height)
: XbmImage(width, height, data)
, m_columns(columns)
, m_rows(rows)
, m_cell_width(cell_width)
, m_cell_height(cell_height)
{}
coord_t columns() const { return m_columns; }
coord_t rows() const { return m_rows; }
coord_t cell_width() const { return m_cell_width; }
coord_t cell_height() const { return m_cell_height; }
protected:
coord_t m_columns;
coord_t m_rows;
coord_t m_cell_width;
coord_t m_cell_height;
};
///////////////////////////////////////////////////////////////////////////
// supported fonts
#ifndef TEXTCANVAS_NO_QBASIC_FONTS
inline const XbmFont&
qbasic8x16_font()
{
// QBasic 8x16 bitmap font
#include "fonts/qbasic8x16_chars.xbm"
static const XbmFont qbasic8x16_chars(qbasic8x16_chars_width,
qbasic8x16_chars_height,
qbasic8x16_chars_bits,
16,
16,
8,
16);
return qbasic8x16_chars;
}
#endif
#ifndef TEXTCANVAS_NO_N88_FONTS
inline const XbmFont&
n88_normal_font()
{
// PC-8801 bitmap font
#include "fonts/n88_normal_chars.xbm"
static const XbmFont n88_normal_chars(n88_normal_chars_width,
n88_normal_chars_height,
n88_normal_chars_bits,
256,
1,
8,
16);
return n88_normal_chars;
}
inline const XbmFont&
n88_quality_font()
{
// PC-9801 bitmap font
#include "fonts/n88_quality_chars.xbm"
static const XbmFont n88_quality_chars(n88_quality_chars_width,
n88_quality_chars_height,
n88_quality_chars_bits,
256,
1,
8,
16);
return n88_quality_chars;
}
inline const XbmFont&
n88_graph_font()
{
// PC-8801 graphical bitmap font
#include "fonts/n88_graph_chars.xbm"
static const XbmFont n88_graph_chars(n88_graph_chars_width,
n88_graph_chars_height,
n88_graph_chars_bits,
256,
1,
8,
16);
return n88_graph_chars;
}
inline const XbmFont&
n88_quarter_font()
{
// PC-9801 quarter bitmap font
#include "fonts/n88_quarter_chars.xbm"
static const XbmFont n88_quarter_chars(n88_quarter_chars_width,
n88_quarter_chars_height,
n88_quarter_chars_bits,
256,
1,
8,
8);
return n88_quarter_chars;
}
#endif
#ifndef TEXTCANVAS_NO_KHDOTFONT
inline const XbmFont&
kh_dot_zenkaku_font()
{
// "KH Dot Kodenmachou 16 Ki" Zenkaku font
#include "fonts/KH-Dot-Kodenmachou-16-Ki.xbm"
static const XbmFont kh_dot_font_zenkaku_chars(
KH_Dot_Kodenmachou_16_Ki_width,
KH_Dot_Kodenmachou_16_Ki_height,
KH_Dot_Kodenmachou_16_Ki_bits,
0x7E - 0x21 + 1,
0x7E - 0x21 + 1,
16,
16);
return kh_dot_font_zenkaku_chars;
}
inline const XbmFont&
kh_dot_hankaku_font()
{
// "KH Dot Kodenmachou 16 Ki" Hankaku font
#include "fonts/KH-Dot-Kodenmachou-16-Ki-ASCII.xbm"
static const XbmFont kh_dot_font_hankaku_chars(
KH_Dot_Kodenmachou_16_Ki_ASCII_width,
KH_Dot_Kodenmachou_16_Ki_ASCII_height,
KH_Dot_Kodenmachou_16_Ki_ASCII_bits,
16,
16,
8,
16);
return kh_dot_font_hankaku_chars;
}
#endif
///////////////////////////////////////////////////////////////////////////
// TextCanvas
class TextCanvas
{
public:
TextCanvas();
TextCanvas(coord_t width,
coord_t height,
color_t fore_color = sharp,
color_t back_color = space);
TextCanvas(const XbmImage& binary,
color_t fore_color = sharp,
color_t back_color = space);
TextCanvas(const TextCanvas& tc);
TextCanvas& operator=(const TextCanvas& tc);
virtual ~TextCanvas();
protected:
coord_t m_width;
coord_t m_height;
string_type m_text;
color_t m_fore_color;
color_t m_back_color;
Point m_pos;
public:
coord_t width() const;
coord_t height() const;
coord_t count() const;
Point& pos();
const Point& pos() const;
color_t& operator[](size_t index);
const color_t& operator[](size_t index) const;
string_type to_str() const;
bool in_range(coord_t x, coord_t y) const;
bool in_range(const Point& p) const;
string_type& data();
const string_type& data() const;
bool same_size(const TextCanvas& tc) const;
void clear();
void clear(color_t ch);
void reset(coord_t width, coord_t height);
void reset(coord_t width, coord_t height, color_t ch);
void resize(coord_t width_, coord_t height_);
void resize(coord_t width_, coord_t height_, color_t ch);
color_t get_pixel(coord_t x, coord_t y) const;
color_t get_pixel(const Point& p) const;
void put_pixel(coord_t x, coord_t y, color_t ch);
void put_pixel(const Point& p, color_t ch);
void put_pixel(coord_t x, coord_t y);
void put_pixel(const Point& p);
bool get_dot(coord_t x, coord_t y) const;
void put_dot(coord_t x, coord_t y, bool dot);
color_t fore_color() const;
void fore_color(color_t ch);
color_t back_color() const;
void back_color(color_t ch);
friend TextCanvas operator!(const TextCanvas& bin);
friend TextCanvas operator&(const TextCanvas& bin1, const TextCanvas& bin2);
friend TextCanvas operator|(const TextCanvas& bin1, const TextCanvas& bin2);
friend TextCanvas operator^(const TextCanvas& bin1, const TextCanvas& bin2);
void fill(const TextCanvas& bin);
void do_mask(const TextCanvas& image, const TextCanvas& mask);
void get_subimage(TextCanvas& image,
coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1) const;
void get_subimage(TextCanvas& image, Point& p0, Point& p1) const;
void get_subimage(XbmImage& image,
coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1) const;
void get_subimage(XbmImage& image, Point& p0, Point& p1) const;
void put_subimage(coord_t x0, coord_t y0, const TextCanvas& image);
void put_subimage(coord_t x0, coord_t y0, const XbmImage& image);
template<typename T_PUTTER0, typename T_PUTTER1>
void put_subimage(coord_t x0,
coord_t y0,
const TextCanvas& image,
T_PUTTER0& fore,
T_PUTTER1& back);
template<typename T_PUTTER0, typename T_PUTTER1>
void put_subimage(coord_t x0,
coord_t y0,
const XbmImage& image,
T_PUTTER0& fore,
T_PUTTER1& back);
Size put_char(coord_t x0,
coord_t y0,
const XbmFont& font,
coord_t char_code);
Size put_char(coord_t x0,
coord_t y0,
const XbmFont& font,
coord_t iColumn,
coord_t iRow);
template<typename T_CONVERTER>
Size put_char(coord_t x0,
coord_t y0,
const XbmFont& font,
coord_t char_code,
T_CONVERTER& conv);
template<typename T_CONVERTER>
Size put_char(coord_t x0,
coord_t y0,
const XbmFont& font,
coord_t iColumn,
coord_t iRow,
T_CONVERTER& conv);
template<typename T_CONVERTER, typename T_PUTTER0, typename T_PUTTER1>
Size put_char(coord_t x0,
coord_t y0,
const XbmFont& font,
coord_t char_code,
T_CONVERTER& conv,
T_PUTTER0& fore,
T_PUTTER1& back);
template<typename T_CONVERTER, typename T_PUTTER0, typename T_PUTTER1>
Size put_char(coord_t x0,
coord_t y0,
const XbmFont& font,
coord_t iColumn,
coord_t iRow,
T_CONVERTER& conv,
T_PUTTER0& fore,
T_PUTTER1& back);
Size jis_put_char(coord_t x0,
coord_t y0,
const XbmFont& font,
coord_t jis_code);
Size jis_put_char(coord_t x0,
coord_t y0,
const XbmFont& font,
coord_t iColumn,
coord_t iRow);
template<typename T_CONVERTER>
Size jis_put_char(coord_t x0,
coord_t y0,
const XbmFont& font,
coord_t jis_code,
T_CONVERTER& conv);
template<typename T_CONVERTER>
Size jis_put_char(coord_t x0,
coord_t y0,
const XbmFont& font,
coord_t iColumn,
coord_t iRow,
T_CONVERTER& conv);
template<typename T_CONVERTER, typename T_PUTTER0, typename T_PUTTER1>
Size jis_put_char(coord_t x0,
coord_t y0,
const XbmFont& font,
coord_t jis_code,
T_CONVERTER& conv,
T_PUTTER0& fore,
T_PUTTER1& back);
template<typename T_CONVERTER, typename T_PUTTER0, typename T_PUTTER1>
Size jis_put_char(coord_t x0,
coord_t y0,
const XbmFont& font,
coord_t iColumn,
coord_t iRow,
T_CONVERTER& conv,
T_PUTTER0& fore,
T_PUTTER1& back);
// draw text rightward
void text_to_right(coord_t x0,
coord_t y0,
const XbmFont& font,
const string_type& text);
void text_to_right(const Point& p0,
const XbmFont& font,
const string_type& text);
template<typename T_CONVERTER>
void text_to_right(coord_t x0,
coord_t y0,
const XbmFont& font,
const string_type& text,
T_CONVERTER& conv);
template<typename T_CONVERTER>
void text_to_right(const Point& p0,
const XbmFont& font,
const string_type& text,
T_CONVERTER& conv);
// japanese draw text rightward
void sjis_text_to_right(coord_t x0,
coord_t y0,
const XbmFont& zenkaku_font,
const XbmFont& hankaku_font,
const string_type& text);
void sjis_text_to_right(const Point& p0,
const XbmFont& zenkaku_font,
const XbmFont& hankaku_font,
const string_type& text);
template<typename T_CONVERTER>
void sjis_text_to_right(coord_t x0,
coord_t y0,
const XbmFont& zenkaku_font,
const XbmFont& hankaku_font,
const string_type& text,
T_CONVERTER& conv);
template<typename T_CONVERTER>
void sjis_text_to_right(const Point& p0,
const XbmFont& zenkaku_font,
const XbmFont& hankaku_font,
const string_type& text,
T_CONVERTER& conv);
void flood_fill(coord_t x, coord_t y, color_t ch, bool surface = false);
void flood_fill(const Point& p, color_t ch, bool surface = false);
void flood_fill_bordered(coord_t x, coord_t y, color_t border_ch);
void flood_fill_bordered(const Point& p, color_t border_ch);
void flood_fill_surface(coord_t x, coord_t y, color_t surface_ch);
void flood_fill_surface(const Point& p, color_t surface_ch);
void move_to(coord_t x, coord_t y);
void move_to(const Point& p);
void line_to(coord_t x, coord_t y);
void line_to(const Point& p);
template<typename T_PUTTER>
void line_to(coord_t x, coord_t y, T_PUTTER& putter);
template<typename T_PUTTER>
void line_to(const Point& p, T_PUTTER& putter);
void line(coord_t x0, coord_t y0, coord_t x1, coord_t y1);
void line(const Point& p0, const Point& p1);
template<typename T_PUTTER>
void line(coord_t x0, coord_t y0, coord_t x1, coord_t y1, T_PUTTER& putter);
void rectangle(coord_t x0, coord_t y0, coord_t x1, coord_t y1);
void rectangle(const Point& p0, const Point& p1);
template<typename T_PUTTER>
void rectangle(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
T_PUTTER& putter);
void fill_rectangle(coord_t x0, coord_t y0, coord_t x1, coord_t y1);
void fill_rectangle(const Point& p0, const Point& p1);
template<typename T_PUTTER>
void fill_rectangle(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
T_PUTTER& putter);
void circle(coord_t x0, coord_t y0, coord_t r);
void circle(const Point& c, coord_t r);
template<typename T_PUTTER>
void circle(coord_t x0, coord_t y0, coord_t r, T_PUTTER& putter);
void fill_circle(coord_t x0, coord_t y0, coord_t r);
void fill_circle(const Point& c, coord_t r);
template<typename T_PUTTER>
void fill_circle(coord_t x0, coord_t y0, coord_t r, T_PUTTER& putter);
void ellipse(coord_t x0, coord_t y0, coord_t x1, coord_t y1);
void ellipse(const Point& p0, const Point& p1);
template<typename T_PUTTER>
void ellipse(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
T_PUTTER& putter);
void fill_ellipse(coord_t x0, coord_t y0, coord_t x1, coord_t y1);
void fill_ellipse(const Point& p0, const Point& p1);
template<typename T_PUTTER>
void fill_ellipse(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
T_PUTTER& putter);
void arc(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
double start_radian,
double end_radian,
bool clockwise = false);
void arc(const Point& p0,
const Point& p1,
double start_radian,
double end_radian,
bool clockwise = false);
template<typename T_PUTTER>
void arc(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
double start_radian,
double end_radian,
bool clockwise,
T_PUTTER& putter);
void arc_to(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
double start_radian,
double end_radian,
bool clockwise = false);
void arc_to(const Point& p0,
const Point& p1,
double start_radian,
double end_radian,
bool clockwise = false);
template<typename T_PUTTER>
void arc_to(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
double start_radian,
double end_radian,
bool clockwise,
T_PUTTER& putter);
void pie(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
double start_radian,
double end_radian);
void pie(const Point& p0,
const Point& p1,
double start_radian,
double end_radian);
template<typename T_PUTTER>
void pie(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
double start_radian,
double end_radian,
T_PUTTER& putter);
void fill_pie(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
double start_radian,
double end_radian,
bool clockwise = false);
void fill_pie(const Point& p0,
const Point& p1,
double start_radian,
double end_radian,
bool clockwise = false);
template<typename T_PUTTER>
void fill_pie(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
double start_radian,
double end_radian,
bool clockwise,
T_PUTTER& putter);
void round_rect(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
coord_t rx,
coord_t ry);
void round_rect(const Point& p0, const Point& p1, coord_t rx, coord_t ry);
template<typename T_PUTTER>
void round_rect(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
coord_t rx,
coord_t ry,
T_PUTTER& putter);
void fill_round_rect(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
coord_t rx,
coord_t ry);
void fill_round_rect(const Point& p0,
const Point& p1,
coord_t rx,
coord_t ry);
template<typename T_PUTTER>
void fill_round_rect(coord_t x0,
coord_t y0,
coord_t x1,
coord_t y1,
coord_t rx,
coord_t ry,
T_PUTTER& putter);
void lines(size_t num_points, const Point* points);
void lines(const Points& points);
template<typename T_PUTTER>
void lines(size_t num_points, const Point* points, T_PUTTER& putter);
void polyline(size_t num_points, const Point* points);
void polyline(const Points& points);
template<typename T_PUTTER>
void polyline(size_t num_points, const Point* points, T_PUTTER& putter);
void polygon(size_t num_points, const Point* points);
void polygon(const Points& points);
template<typename T_PUTTER>
void polygon(size_t num_points, const Point* points, T_PUTTER& putter);
void fill_polygon(size_t num_points,
const Point* points,
bool alternate = false);
void fill_polygon(const Points& points, bool alternate = false);
template<typename T_PUTTER>
void fill_polygon(size_t num_points,
const Point* points,
bool alternate,
T_PUTTER& putter);
template<typename T_PUTTER>
void fill_polygon_alternate(size_t num_points,
const Point* points,
T_PUTTER& putter);
template<typename T_PUTTER>
void fill_polygon_alternate(const Points& points, T_PUTTER& putter);
template<typename T_PUTTER>
void fill_polygon_winding(size_t num_points,
const Point* points,
T_PUTTER& putter);
template<typename T_PUTTER>
void fill_polygon_winding(const Points& points, T_PUTTER& putter);
void swap(TextCanvas& other);
void rotate_left(const TextCanvas& other);
void rotate_right(const TextCanvas& other);
void rotate_180(const TextCanvas& other);
void rotate_left();
void rotate_right();
void rotate_180();
void scale(const TextCanvas& other, coord_t width, coord_t height);
void scale(coord_t width, coord_t height);
void scale_cross(const TextCanvas& other, coord_t x_multi, coord_t y_multi);
void scale_cross(coord_t x_multi, coord_t y_multi);
void scale_percent(const TextCanvas& other,
coord_t x_percent,
coord_t y_percent);
void scale_percent(coord_t x_percent, coord_t y_percent);
void mirror_h(const TextCanvas& other);
void mirror_v(const TextCanvas& other);
void mirror_h();
void mirror_v();
};
///////////////////////////////////////////////////////////////////////////
// pixel putters
struct NonePutter
{
NonePutter() {}
void operator()(coord_t x, coord_t y) {}
};
struct SimplePutter
{
TextCanvas& m_tc;
SimplePutter(TextCanvas& tc)
: m_tc(tc)
{}
void operator()(coord_t x, coord_t y) { m_tc.put_pixel(x, y); }
};
struct ColorPutter
{
TextCanvas& m_tc;
color_t m_color;
ColorPutter(TextCanvas& tc, color_t color)
: m_tc(tc)
, m_color(color)
{}
void operator()(coord_t x, coord_t y) { m_tc.put_pixel(x, y, m_color); }
};
struct XorPutter
{
TextCanvas& m_tc;
XorPutter(TextCanvas& tc)
: m_tc(tc)
{}
void operator()(coord_t x, coord_t y)
{
color_t c = m_tc.get_pixel(x, y);
m_tc.put_pixel(x, y, c ^ m_tc.fore_color());
}
};
struct WidenPutter
{
TextCanvas& m_tc;
WidenPutter(TextCanvas& tc)
: m_tc(tc)
{}
void operator()(coord_t x, coord_t y)
{
m_tc.put_pixel(x, y);
m_tc.put_pixel(x - 1, y);
m_tc.put_pixel(x + 1, y);
m_tc.put_pixel(x, y - 1);
m_tc.put_pixel(x, y + 1);
}
};
///////////////////////////////////////////////////////////////////////////
// image converters
struct NoneConverter
{
void operator()(TextCanvas& tc) {}
};
struct YokoNibaiKaku
{
void operator()(TextCanvas& tc) { tc.scale_cross(2, 1); }
};
struct TateNibaiKaku
{
void operator()(TextCanvas& tc) { tc.scale_cross(1, 2); }
};
struct YonBaiKaku
{
void operator()(TextCanvas& tc) { tc.scale_cross(2, 2); }
};
struct LeftRotator
{
void operator()(TextCanvas& tc) { tc.rotate_left(); }
};
struct RightRotator
{
void operator()(TextCanvas& tc) { tc.rotate_right(); }
};
template<typename T_LEFT_CONV, typename T_RIGHT_CONV>
struct PairConverter
{
T_LEFT_CONV& m_left;
T_RIGHT_CONV& m_right;
PairConverter(T_LEFT_CONV& left, T_RIGHT_CONV& right)
: m_left(left)
, m_right(right)
{}
void operator()(TextCanvas& tc)
{
m_left(tc);
m_right(tc);
}
};
///////////////////////////////////////////////////////////////////////////
inline double
normalize_radian(double radian)
{
radian = fmod(radian, 2 * pi);
if (radian < -pi)
radian += 2 * pi;
else if (radian > pi)
radian -= 2 * pi;
return radian;
}
inline bool
check_range(double at, bool clockwise, double a0, double a1)
{
if (clockwise) {
if ((-pi <= at && at <= a0 + epsilon) ||
(a1 - epsilon <= at && at <= pi)) {
return true;
}
} else {
if (a0 - epsilon <= at && at <= a1 + epsilon) {
return true;
}
}
return false;
}
inline bool
get_polygon_box(Point& p0, Point& p1, size_t num_points, const Point* points)
{
if (num_points == 0)
return false;
p0 = p1 = points[0];
for (size_t i = 1; i < num_points; ++i) {
coord_t x = points[i].x;
if (x < p0.x)
p0.x = x;
if (x > p1.x)
p1.x = x;
coord_t y = points[i].y;
if (y < p0.y)
p0.y = y;
if (y > p1.y)
p1.y = y;
}
return true;
}
inline size_t
crossing_number(const Point& p, const Points& points)
{
size_t ret = 0;
for (size_t i = 0; i < points.size() - 1; ++i) {
if ((points[i].y <= p.y && points[i + 1].y > p.y) ||
(points[i].y > p.y && points[i + 1].y <= p.y)) {
double f =
double(p.y - points[i].y) / (points[i + 1].y - points[i].y);
if (p.x - points[i].x < f * (points[i + 1].x - points[i].x)) {
++ret;
}
}
}
return ret;
}
inline coord_t
winding_number(const Point& p, const Points& points)
{
coord_t ret = 0;
for (size_t i = 0; i < points.size() - 1; ++i) {
if (points[i].y <= p.y && points[i + 1].y > p.y) {
double f =
double(p.y - points[i].y) / (points[i + 1].y - points[i].y);
if (p.x - points[i].x < f * (points[i + 1].x - points[i].x))
++ret;
} else if (points[i].y > p.y && points[i + 1].y <= p.y) {
double f =
double(p.y - points[i].y) / (points[i + 1].y - points[i].y);
if (p.x - points[i].x < f * (points[i + 1].x - points[i].x))
--ret;
}
}