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//
// Definition of OpenGL graphics driver
// for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2016 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// https://www.fltk.org/COPYING.php
//
// Please see the following page on how to report bugs and issues:
//
// https://www.fltk.org/bugs.php
//
/**
\file Fl_OpenGL_Graphics_Driver.H
\brief Definition of OpenGL graphics driver.
*/
#ifndef FL_OPENGL_GRAPHICS_DRIVER_H
#define FL_OPENGL_GRAPHICS_DRIVER_H
#include <FL/Fl_Graphics_Driver.H>
#include <FL/fl_draw.H>
/**
\brief OpenGL specific graphics class.
*/
class Fl_OpenGL_Graphics_Driver : public Fl_Graphics_Driver {
public:
float pixels_per_unit_;
float line_width_;
int line_stipple_;
Fl_OpenGL_Graphics_Driver() :
pixels_per_unit_(1.0f),
line_width_(1.0f),
line_stipple_(FL_SOLID) { }
// --- line and polygon drawing with integer coordinates
void point(int x, int y);
void rect(int x, int y, int w, int h);
void rectf(int x, int y, int w, int h);
void line(int x, int y, int x1, int y1);
void line(int x, int y, int x1, int y1, int x2, int y2);
void xyline(int x, int y, int x1);
void xyline(int x, int y, int x1, int y2);
void xyline(int x, int y, int x1, int y2, int x3);
void yxline(int x, int y, int y1);
void yxline(int x, int y, int y1, int x2);
void yxline(int x, int y, int y1, int x2, int y3);
void loop(int x0, int y0, int x1, int y1, int x2, int y2);
void loop(int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3);
void polygon(int x0, int y0, int x1, int y1, int x2, int y2);
void polygon(int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3);
void focus_rect(int x, int y, int w, int h);
// ---- clipping
void push_clip(int x, int y, int w, int h);
void pop_clip();
void push_no_clip();
Fl_Region clip_region();
void clip_region(Fl_Region r);
void restore_clip();
int not_clipped(int x, int y, int w, int h);
int clip_box(int x, int y, int w, int h, int &X, int &Y, int &W, int &H);
// ---- matrix transformed drawing
void transformed_vertex(double xf, double yf);
void begin_points();
void end_points();
void begin_line();
void end_line();
void begin_loop();
void end_loop();
void begin_polygon();
void end_polygon();
void begin_complex_polygon();
void gap();
void end_complex_polygon();
void fixloop();
void circle(double x, double y, double r);
void arc(int x, int y, int w, int h, double a1, double a2);
void arc(double x, double y, double r, double start, double end);
void pie(int x, int y, int w, int h, double a1, double a2);
void line_style(int style, int width=0, char* dashes=0);
void color(Fl_Color c);
Fl_Color color() { return color_; }
void color(uchar r, uchar g, uchar b);
// --- implementation is in Fl_OpenGL_Graphics_Driver_font.cxx
void font(Fl_Font face, Fl_Fontsize fsize);
Fl_Font font();
void draw(const char *str, int n, int x, int y);
void draw(const char *str, int n, float x, float y);
void draw(int angle, const char *str, int n, int x, int y);
double width(const char *str, int n);
double width(unsigned int c);
void text_extents(const char*, int n, int& dx, int& dy, int& w, int& h);
int height();
int descent();
};
#endif // FL_OPENGL_GRAPHICS_DRIVER_H
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