140 lines
4.5 KiB
C++
140 lines
4.5 KiB
C++
//
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// Support for Cairo graphics for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 2021 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// https://www.fltk.org/COPYING.php
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//
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// Please see the following page on how to report bugs and issues:
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//
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// https://www.fltk.org/bugs.php
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//
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/* \file
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Declaration of class Fl_Cairo_Graphics_Driver.
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*/
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#include <FL/Fl_Graphics_Driver.H>
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typedef struct _cairo cairo_t;
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typedef struct _PangoLayout PangoLayout;
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typedef struct _PangoFontDescription PangoFontDescription;
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class FL_EXPORT Fl_Cairo_Graphics_Driver : public Fl_Graphics_Driver {
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protected:
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cairo_t *cairo_;
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PangoLayout *pango_layout_;
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void draw_rgb_bitmap_(Fl_Image *img,int XP, int YP, int WP, int HP, int cx, int cy);
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public:
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Fl_Cairo_Graphics_Driver();
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virtual ~Fl_Cairo_Graphics_Driver();
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enum SHAPE {NONE=0, LINE, LOOP, POLYGON, POINTS};
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class Clip {
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public:
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int x, y, w, h;
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Clip *prev;
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};
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Clip * clip_;
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int lang_level_;
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int gap_;
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int pages_;
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cairo_t *cr() { return cairo_; }
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PangoLayout *pango_layout() {return pango_layout_;};
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void check_status(void);
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enum SHAPE shape_;
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int linewidth_;// need for clipping, lang level 1-2
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int linestyle_;//
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unsigned char cr_,cg_,cb_;
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char linedash_[256];//should be enough
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void concat(); // transform ror scalable dradings...
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void reconcat(); //invert
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void recover(); //recovers the state after grestore (such as line styles...)
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void reset();
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float scale_x;
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float scale_y;
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float angle;
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int left_margin;
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int top_margin;
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double pw_, ph_;
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uchar bg_r, bg_g, bg_b;
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void transformed_draw(const char* s, int n, double x, double y); //precise text placing
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// implementation of drawing methods
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void color(Fl_Color c);
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void color(uchar r, uchar g, uchar b);
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Fl_Color color();
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void push_clip(int x, int y, int w, int h);
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void push_no_clip();
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void pop_clip();
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void line_style(int style, int width=0, char* dashes=0);
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void rect(int x, int y, int w, int h);
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void rectf(int x, int y, int w, int h);
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void xyline(int x, int y, int x1);
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void xyline(int x, int y, int x1, int y2);
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void xyline(int x, int y, int x1, int y2, int x3);
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void yxline(int x, int y, int y1);
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void yxline(int x, int y, int y1, int x2);
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void yxline(int x, int y, int y1, int x2, int y3);
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void line(int x1, int y1, int x2, int y2);
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void line(int x1, int y1, int x2, int y2, int x3, int y3);
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void loop(int x0, int y0, int x1, int y1, int x2, int y2);
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void loop(int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3);
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void polygon(int x0, int y0, int x1, int y1, int x2, int y2);
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void polygon(int x0, int y0, int x1, int y1, int x2, int y2, int x3, int y3);
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void begin_points();
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void begin_line();
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void begin_loop();
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void begin_polygon();
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void vertex(double x, double y);
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void curve(double x, double y, double x1, double y1, double x2, double y2, double x3, double y3);
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void circle(double x, double y, double r);
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void arc(double x, double y, double r, double start, double a);
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void arc(int x, int y, int w, int h, double a1, double a2);
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void pie(int x, int y, int w, int h, double a1, double a2);
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void end_points();
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void end_line();
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void end_loop();
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void end_polygon();
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void begin_complex_polygon(){begin_polygon();};
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void gap(){gap_=1;};
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void end_complex_polygon(){end_polygon();};
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void transformed_vertex(double x, double y);
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void draw_image_mono(const uchar* d, int x,int y,int w,int h, int delta=1, int ld=0);
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void draw_image(Fl_Draw_Image_Cb call, void* data, int x,int y, int w, int h, int delta=3);
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void draw_image_mono(Fl_Draw_Image_Cb call, void* data, int x,int y, int w, int h, int delta=1);
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void draw(const char* s, int nBytes, int x, int y) {transformed_draw(s,nBytes,x,y); };
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void draw(const char* s, int nBytes, float x, float y) {transformed_draw(s,nBytes,x,y); };
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void draw(int angle, const char *str, int n, int x, int y);
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void rtl_draw(const char* s, int n, int x, int y);
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void draw_pixmap(Fl_Pixmap * pxm,int XP, int YP, int WP, int HP, int cx, int cy);
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void draw_bitmap(Fl_Bitmap * bitmap,int XP, int YP, int WP, int HP, int cx, int cy);
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void draw_rgb(Fl_RGB_Image * rgb,int XP, int YP, int WP, int HP, int cx, int cy);
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// ---
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Fl_Bitmask create_bitmask(int w, int h, const uchar *array) { return 0L; }
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void ps_origin(int x, int y);
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void ps_translate(int, int);
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void ps_untranslate();
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};
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