fl_draw.H

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//
// Portable drawing function header file for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2020 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
//

#ifndef fl_draw_H
#define fl_draw_H

#include <FL/Enumerations.H>  // for the color names
#include <FL/Fl_Graphics_Driver.H>     // for fl_graphics_driver + Fl_Region

// Image class...
class Fl_Image;
class Fl_Window;

// Label flags...
FL_EXPORT extern char fl_draw_shortcut;

// Colors:
inline void     fl_color(Fl_Color c) {fl_graphics_driver->color(c); } // select indexed color
inline void fl_color(int c) {fl_color((Fl_Color)c);}
inline void     fl_color(uchar r, uchar g, uchar b) {fl_graphics_driver->color(r,g,b); } // select actual color
inline Fl_Color fl_color() {return fl_graphics_driver->color();}
// clip:
inline void fl_push_clip(int x, int y, int w, int h) {fl_graphics_driver->push_clip(x,y,w,h); }
#define fl_clip fl_push_clip

inline void fl_push_no_clip() {fl_graphics_driver->push_no_clip(); }
inline void fl_pop_clip() {fl_graphics_driver->pop_clip(); }

inline int fl_not_clipped(int x, int y, int w, int h) {
  return fl_graphics_driver->not_clipped(x, y, w, h);
}

inline int fl_clip_box(int x, int y, int w, int h, int& X, int& Y, int& W, int& H) {
  return fl_graphics_driver->clip_box(x, y, w, h, X, Y, W, H);
}

inline void fl_restore_clip() {
  fl_graphics_driver->restore_clip();
}

inline void fl_clip_region(Fl_Region r) { fl_graphics_driver->clip_region(r); }

inline Fl_Region fl_clip_region() { return fl_graphics_driver->clip_region(); }


// points:
inline void fl_point(int x, int y) { fl_graphics_driver->point(x,y); }

// line type:
inline void fl_line_style(int style, int width=0, char* dashes=0) {fl_graphics_driver->line_style(style,width,dashes); }
enum {
  FL_SOLID      = 0,            
  FL_DASH       = 1,            
  FL_DOT        = 2,            
  FL_DASHDOT    = 3,            
  FL_DASHDOTDOT = 4,            

  FL_CAP_FLAT   = 0x100,        
  FL_CAP_ROUND  = 0x200,        
  FL_CAP_SQUARE = 0x300,        

  FL_JOIN_MITER = 0x1000,       
  FL_JOIN_ROUND = 0x2000,       
  FL_JOIN_BEVEL = 0x3000        
};

// rectangles tweaked to exactly fill the pixel rectangle:

inline void fl_rect(int x, int y, int w, int h) { fl_graphics_driver->rect(x,y,w,h); }

inline void fl_focus_rect(int x, int y, int w, int h) { fl_graphics_driver->focus_rect(x, y, w, h); }
inline void fl_rect(int x, int y, int w, int h, Fl_Color c) {fl_color(c); fl_rect(x,y,w,h);}
inline void fl_rectf(int x, int y, int w, int h) { fl_graphics_driver->rectf(x,y,w,h); }
inline void fl_rectf(int x, int y, int w, int h, Fl_Color c) {fl_color(c); fl_rectf(x,y,w,h);}

/* note: doxygen comment here to avoid triplication in os-speciic files */
FL_EXPORT void fl_rectf(int x, int y, int w, int h, uchar r, uchar g, uchar b);

// line segments:
inline void fl_line(int x, int y, int x1, int y1) {fl_graphics_driver->line(x,y,x1,y1); }
inline void fl_line(int x, int y, int x1, int y1, int x2, int y2) {fl_graphics_driver->line(x,y,x1,y1,x2,y2); }

// closed line segments:
inline void fl_loop(int x, int y, int x1, int y1, int x2, int y2) {fl_graphics_driver->loop(x,y,x1,y1,x2,y2); }
inline void fl_loop(int x, int y, int x1, int y1, int x2, int y2, int x3, int y3)
  {fl_graphics_driver->loop(x,y,x1,y1,x2,y2,x3,y3); }

// filled polygons
inline void fl_polygon(int x, int y, int x1, int y1, int x2, int y2) {fl_graphics_driver->polygon(x,y,x1,y1,x2,y2); }
inline void fl_polygon(int x, int y, int x1, int y1, int x2, int y2, int x3, int y3)
  { fl_graphics_driver->polygon(x,y,x1,y1,x2,y2,x3,y3); }

// draw rectilinear lines, horizontal segment first:
inline void fl_xyline(int x, int y, int x1) {fl_graphics_driver->xyline(x,y,x1);}
inline void fl_xyline(int x, int y, int x1, int y2) {fl_graphics_driver->xyline(x,y,x1,y2);}
inline void fl_xyline(int x, int y, int x1, int y2, int x3) {fl_graphics_driver->xyline(x,y,x1,y2,x3);}

// draw rectilinear lines, vertical segment first:
inline void fl_yxline(int x, int y, int y1) {fl_graphics_driver->yxline(x,y,y1);}
inline void fl_yxline(int x, int y, int y1, int x2) {fl_graphics_driver->yxline(x,y,y1,x2);}
inline void fl_yxline(int x, int y, int y1, int x2, int y3) {fl_graphics_driver->yxline(x,y,y1,x2,y3);}

// circular lines and pie slices (code in fl_arci.C):
inline void fl_arc(int x, int y, int w, int h, double a1, double a2) {fl_graphics_driver->arc(x,y,w,h,a1,a2); }
inline void fl_pie(int x, int y, int w, int h, double a1, double a2) {fl_graphics_driver->pie(x,y,w,h,a1,a2); }
FL_EXPORT void fl_chord(int x, int y, int w, int h, double a1, double a2); // nyi

// scalable drawing code (code in fl_vertex.C and fl_arc.C):
inline void fl_push_matrix() { fl_graphics_driver->push_matrix(); }
inline void fl_pop_matrix() { fl_graphics_driver->pop_matrix(); }
inline void fl_scale(double x, double y) {
  fl_graphics_driver->mult_matrix(x,0,0,y,0,0);
}
inline void fl_scale(double x) {
  fl_graphics_driver->mult_matrix(x,0,0,x,0,0);
}
inline void fl_translate(double x, double y) { fl_graphics_driver->translate(x, y); }
inline void fl_rotate(double d) { fl_graphics_driver->rotate(d); }
inline void fl_mult_matrix(double a, double b, double c, double d, double x,double y)
        { fl_graphics_driver->mult_matrix(a, b, c, d, x, y); }
inline void fl_begin_points() {fl_graphics_driver->begin_points(); }
inline void fl_begin_line() {fl_graphics_driver->begin_line(); }
inline void fl_begin_loop() {fl_graphics_driver->begin_loop(); }
inline void fl_begin_polygon() {fl_graphics_driver->begin_polygon(); }
inline void fl_vertex(double x, double y) {fl_graphics_driver->vertex(x,y); }
inline void fl_curve(double X0, double Y0, double X1, double Y1, double X2, double Y2, double X3, double Y3)
  {fl_graphics_driver->curve(X0,Y0,X1,Y1,X2,Y2,X3,Y3); }
inline void fl_arc(double x, double y, double r, double start, double end) {fl_graphics_driver->arc(x,y,r,start,end); }
inline void fl_circle(double x, double y, double r) {fl_graphics_driver->circle(x,y,r); }
inline void fl_end_points() {fl_graphics_driver->end_points(); }
inline void fl_end_line() {fl_graphics_driver->end_line(); }
inline void fl_end_loop() {fl_graphics_driver->end_loop(); }
inline void fl_end_polygon() {fl_graphics_driver->end_polygon(); }
inline void fl_begin_complex_polygon() {fl_graphics_driver->begin_complex_polygon(); }
inline void fl_gap() {fl_graphics_driver->gap(); }
inline void fl_end_complex_polygon() {fl_graphics_driver->end_complex_polygon(); }
// get and use transformed positions:
inline double fl_transform_x(double x, double y) {return fl_graphics_driver->transform_x(x, y); }
inline double fl_transform_y(double x, double y) {return fl_graphics_driver->transform_y(x, y); }
inline double fl_transform_dx(double x, double y) {return fl_graphics_driver->transform_dx(x, y); }
inline double fl_transform_dy(double x, double y) {return fl_graphics_driver->transform_dy(x, y); }
inline void fl_transformed_vertex(double xf, double yf) {fl_graphics_driver->transformed_vertex(xf,yf); }

inline void fl_copy_offscreen(int x, int y, int w, int h, Fl_Offscreen pixmap, int srcx, int srcy) {
    fl_graphics_driver->copy_offscreen(x, y, w, h, pixmap, srcx, srcy);
}

FL_EXPORT Fl_Offscreen fl_create_offscreen(int w, int h);
FL_EXPORT void fl_begin_offscreen(Fl_Offscreen b);
FL_EXPORT void fl_end_offscreen(void);
FL_EXPORT void fl_delete_offscreen(Fl_Offscreen bitmap);
FL_EXPORT void fl_rescale_offscreen(Fl_Offscreen &ctx);

/* NOTE: doxygen comments here to avoid triplication in os-specific sources */

// Fonts:
/*
  Sets the current font, which is then used in various drawing routines.
  Implemented and documented in src/fl_draw.cxx
*/
FL_EXPORT void fl_font(Fl_Font face, Fl_Fontsize fsize);

inline Fl_Font fl_font() {return fl_graphics_driver->font();}
inline Fl_Fontsize fl_size() {return fl_graphics_driver->size();}

// information you can get about the current font:
inline int fl_height() {return fl_graphics_driver->height();}
FL_EXPORT int fl_height(int font, int size);
inline int  fl_descent() {return fl_graphics_driver->descent();}
FL_EXPORT double fl_width(const char* txt);
inline double fl_width(const char* txt, int n) {return fl_graphics_driver->width(txt, n);}
inline double fl_width(unsigned int c)  {return fl_graphics_driver->width(c);}
FL_EXPORT void fl_text_extents(const char*, int& dx, int& dy, int& w, int& h); // NO fltk symbol expansion will be performed
inline void fl_text_extents(const char *t, int n, int& dx, int& dy, int& w, int& h)
  {fl_graphics_driver->text_extents(t, n, dx, dy, w, h);}

// font encoding:
// Note: doxygen comments here to avoid duplication for os-sepecific cases
FL_EXPORT const char *fl_latin1_to_local(const char *t, int n=-1);
FL_EXPORT const char *fl_local_to_latin1(const char *t, int n=-1);
FL_EXPORT const char *fl_mac_roman_to_local(const char *t, int n=-1);
FL_EXPORT const char *fl_local_to_mac_roman(const char *t, int n=-1);
FL_EXPORT void fl_draw(const char* str, int x, int y);
FL_EXPORT void fl_draw(int angle, const char* str, int x, int y);
inline void fl_draw(const char* str, int n, int x, int y) {fl_graphics_driver->draw(str,n,x,y); }
inline void fl_draw(int angle, const char* str, int n, int x, int y) {fl_graphics_driver->draw(angle,str,n,x,y); }
inline void fl_rtl_draw(const char* str, int n, int x, int y) {fl_graphics_driver->rtl_draw(str,n,x,y); }
FL_EXPORT void fl_measure(const char* str, int& x, int& y,
                          int draw_symbols = 1);
FL_EXPORT void fl_draw(const char* str, int x, int y, int w, int h,
                       Fl_Align align,
                       Fl_Image* img=0, int draw_symbols = 1);
FL_EXPORT void fl_draw(const char* str, int x, int y, int w, int h,
                       Fl_Align align,
                       void (*callthis)(const char *,int,int,int),
                       Fl_Image* img=0, int draw_symbols = 1);

// boxtypes:
FL_EXPORT void fl_frame(const char* s, int x, int y, int w, int h);
FL_EXPORT void fl_frame2(const char* s, int x, int y, int w, int h);
FL_EXPORT void fl_draw_box(Fl_Boxtype, int x, int y, int w, int h, Fl_Color);

// images:

inline void fl_draw_image(const uchar* buf, int X,int Y,int W,int H, int D=3, int L=0)
  { fl_graphics_driver->draw_image(buf, X, Y, W, H, D, L); }

inline void fl_draw_image_mono(const uchar* buf, int X,int Y,int W,int H, int D=1, int L=0)
  { fl_graphics_driver->draw_image_mono(buf, X, Y, W, H, D, L); }

inline void fl_draw_image(Fl_Draw_Image_Cb cb, void* data, int X,int Y,int W,int H, int D=3)
  { fl_graphics_driver->draw_image(cb, data, X, Y, W, H, D); }

inline void fl_draw_image_mono(Fl_Draw_Image_Cb cb, void* data, int X,int Y,int W,int H, int D=1)
  { fl_graphics_driver->draw_image_mono(cb, data, X, Y, W, H, D); }

inline char fl_can_do_alpha_blending() {return Fl_Graphics_Driver::default_driver().can_do_alpha_blending();}

FL_EXPORT uchar *fl_read_image(uchar *p,int X,int Y,int W,int H,int alpha=0);
FL_EXPORT Fl_RGB_Image *fl_capture_window_part(Fl_Window *win, int x, int y, int w, int h);

// pixmaps:
FL_EXPORT int fl_draw_pixmap(const char* const* data, int x,int y,Fl_Color bg=FL_GRAY);
inline int fl_draw_pixmap(/*const*/ char* const* data, int x, int y, Fl_Color bg=FL_GRAY)
{
  return fl_draw_pixmap((const char*const*)data,x,y,bg);
}
FL_EXPORT int fl_measure_pixmap(/*const*/ char* const* data, int &w, int &h);
FL_EXPORT int fl_measure_pixmap(const char* const* cdata, int &w, int &h);

// other:
FL_EXPORT void fl_scroll(int X, int Y, int W, int H, int dx, int dy,
                         void (*draw_area)(void*, int,int,int,int), void* data);
FL_EXPORT const char* fl_shortcut_label(unsigned int shortcut);
FL_EXPORT const char* fl_shortcut_label(unsigned int shortcut, const char **eom);
FL_EXPORT unsigned int fl_old_shortcut(const char* s);
FL_EXPORT void fl_overlay_rect(int x,int y,int w,int h);
FL_EXPORT void fl_overlay_clear();
FL_EXPORT void fl_cursor(Fl_Cursor);
FL_EXPORT void fl_cursor(Fl_Cursor, Fl_Color fg, Fl_Color bg=FL_WHITE);
FL_EXPORT const char* fl_expand_text(const char* from, char* buf, int maxbuf,
                                     double maxw, int& n, double &width,
                                     int wrap, int draw_symbols = 0);

// XIM:
FL_EXPORT void fl_set_status(int X, int Y, int W, int H);
FL_EXPORT void fl_set_spot(int font, int size, int X, int Y, int W, int H, Fl_Window *win=0);
FL_EXPORT void fl_reset_spot(void);



// XForms symbols:
FL_EXPORT int fl_draw_symbol(const char* label,int x,int y,int w,int h, Fl_Color);
FL_EXPORT int fl_add_symbol(const char* name, void (*drawit)(Fl_Color), int scalable);
#endif