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Fr4nz D13trich 2025-11-22 13:58:55 +01:00
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3party/agg/ctrl/agg_gamma_ctrl.h Normal file
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//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.4
// 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
//----------------------------------------------------------------------------
//
// class gamma_ctrl
//
//----------------------------------------------------------------------------
#ifndef AGG_GAMMA_CTRL_INCLUDED
#define AGG_GAMMA_CTRL_INCLUDED
#include "agg_basics.h"
#include "agg_gamma_spline.h"
#include "agg_ellipse.h"
#include "agg_conv_stroke.h"
#include "agg_gsv_text.h"
#include "agg_trans_affine.h"
#include "agg_color_rgba.h"
#include "agg_ctrl.h"
namespace agg
{
//------------------------------------------------------------------------
// Class that can be used to create an interactive control to set up
// gamma arrays.
//------------------------------------------------------------------------
class gamma_ctrl_impl : public ctrl
{
public:
gamma_ctrl_impl(double x1, double y1, double x2, double y2, bool flip_y=false);
// Set other parameters
void border_width(double t, double extra=0.0);
void curve_width(double t) { m_curve_width = t; }
void grid_width(double t) { m_grid_width = t; }
void text_thickness(double t) { m_text_thickness = t; }
void text_size(double h, double w=0.0);
void point_size(double s) { m_point_size = s; }
// Event handlers. Just call them if the respective events
// in your system occure. The functions return true if redrawing
// is required.
virtual bool in_rect(double x, double y) const;
virtual bool on_mouse_button_down(double x, double y);
virtual bool on_mouse_button_up(double x, double y);
virtual bool on_mouse_move(double x, double y, bool button_flag);
virtual bool on_arrow_keys(bool left, bool right, bool down, bool up);
void change_active_point();
// A copy of agg::gamma_spline interface
void values(double kx1, double ky1, double kx2, double ky2);
void values(double* kx1, double* ky1, double* kx2, double* ky2) const;
const unsigned char* gamma() const { return m_gamma_spline.gamma(); }
double y(double x) const { return m_gamma_spline.y(x); }
double operator() (double x) const { return m_gamma_spline.y(x); }
const gamma_spline& get_gamma_spline() const { return m_gamma_spline; }
// Vertex soutce interface
unsigned num_paths() { return 7; }
void rewind(unsigned idx);
unsigned vertex(double* x, double* y);
private:
void calc_spline_box();
void calc_points();
void calc_values();
gamma_spline m_gamma_spline;
double m_border_width;
double m_border_extra;
double m_curve_width;
double m_grid_width;
double m_text_thickness;
double m_point_size;
double m_text_height;
double m_text_width;
double m_xc1;
double m_yc1;
double m_xc2;
double m_yc2;
double m_xs1;
double m_ys1;
double m_xs2;
double m_ys2;
double m_xt1;
double m_yt1;
double m_xt2;
double m_yt2;
conv_stroke<gamma_spline> m_curve_poly;
ellipse m_ellipse;
gsv_text m_text;
conv_stroke<gsv_text> m_text_poly;
unsigned m_idx;
unsigned m_vertex;
double m_vx[32];
double m_vy[32];
double m_xp1;
double m_yp1;
double m_xp2;
double m_yp2;
bool m_p1_active;
unsigned m_mouse_point;
double m_pdx;
double m_pdy;
};
template<class ColorT> class gamma_ctrl : public gamma_ctrl_impl
{
public:
gamma_ctrl(double x1, double y1, double x2, double y2, bool flip_y=false) :
gamma_ctrl_impl(x1, y1, x2, y2, flip_y),
m_background_color(rgba(1.0, 1.0, 0.9)),
m_border_color(rgba(0.0, 0.0, 0.0)),
m_curve_color(rgba(0.0, 0.0, 0.0)),
m_grid_color(rgba(0.2, 0.2, 0.0)),
m_inactive_pnt_color(rgba(0.0, 0.0, 0.0)),
m_active_pnt_color(rgba(1.0, 0.0, 0.0)),
m_text_color(rgba(0.0, 0.0, 0.0))
{
m_colors[0] = &m_background_color;
m_colors[1] = &m_border_color;
m_colors[2] = &m_curve_color;
m_colors[3] = &m_grid_color;
m_colors[4] = &m_inactive_pnt_color;
m_colors[5] = &m_active_pnt_color;
m_colors[6] = &m_text_color;
}
// Set colors
void background_color(const ColorT& c) { m_background_color = c; }
void border_color(const ColorT& c) { m_border_color = c; }
void curve_color(const ColorT& c) { m_curve_color = c; }
void grid_color(const ColorT& c) { m_grid_color = c; }
void inactive_pnt_color(const ColorT& c) { m_inactive_pnt_color = c; }
void active_pnt_color(const ColorT& c) { m_active_pnt_color = c; }
void text_color(const ColorT& c) { m_text_color = c; }
const ColorT& color(unsigned i) const { return *m_colors[i]; }
private:
gamma_ctrl(const gamma_ctrl<ColorT>&);
const gamma_ctrl<ColorT>& operator = (const gamma_ctrl<ColorT>&);
ColorT m_background_color;
ColorT m_border_color;
ColorT m_curve_color;
ColorT m_grid_color;
ColorT m_inactive_pnt_color;
ColorT m_active_pnt_color;
ColorT m_text_color;
ColorT* m_colors[7];
};
}
#endif