canvas_cairo.h

   1
   2 ////////////////////////////////////////////////////////////////////
   3 // START_IP_HEADER                                                //
   4 //                                                                //
   5 // Written by Francois Fleuret                                    //
   6 // Contact <francois.fleuret@idiap.ch> for comments & bug reports //
   7 //                                                                //
   8 // END_IP_HEADER                                                  //
   9 ////////////////////////////////////////////////////////////////////
  10
  11 #ifndef CANVAS_CAIRO_H
  12 #define CANVAS_CAIRO_H
  13
  14 #include "canvas.h"
  15
  16 #include <stdio.h>
  17 #include <cairo.h>
  18
  19 class CanvasCairo : public Canvas {
  20   unsigned char *_data;
  21   cairo_surface_t *_image;
  22   cairo_t *_context_resource;
  23
  24 public:
  25   CanvasCairo(scalar_t scale, int width, int height);
  26   ~CanvasCairo();
  27
  28   virtual void set_line_width(scalar_t w);
  29   virtual void set_drawing_color(scalar_t r, scalar_t g, scalar_t b);
  30   virtual void draw_polygon(int filled, int nb, scalar_t *x, scalar_t *y);
  31   virtual void write_png(FILE *file);
  32 };
  33
  34 #endif