Fl_Image_Surface.H

//
// Draw-to-image code 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
//
 
#ifndef Fl_Image_Surface_H
#define Fl_Image_Surface_H
 
#include <FL/Fl_Widget_Surface.H>
#include <FL/Fl_Image.H>
#include <FL/Fl_Shared_Image.H>
#include <FL/platform_types.h> // for Fl_Offscreen
 
 
class FL_EXPORT Fl_Image_Surface : public Fl_Widget_Surface {
  friend class Fl_Graphics_Driver;
private:
  class Fl_Image_Surface_Driver *platform_surface;
  Fl_Offscreen get_offscreen_before_delete_();
protected:
  void translate(int x, int y) FL_OVERRIDE;
  void untranslate() FL_OVERRIDE;
public:
  Fl_Image_Surface(int w, int h, int high_res = 0, Fl_Offscreen off = 0);
  ~Fl_Image_Surface();
  void set_current() FL_OVERRIDE;
  bool is_current() FL_OVERRIDE;
  Fl_RGB_Image *image();
  Fl_Shared_Image *highres_image();
  void origin(int *x, int *y) FL_OVERRIDE;
  void origin(int x, int y) FL_OVERRIDE;
  int printable_rect(int *w, int *h) FL_OVERRIDE;
  Fl_Offscreen offscreen();
  void rescale();
  void mask(const Fl_RGB_Image *);
};
 
 
class Fl_Image_Surface_Driver : public Fl_Widget_Surface {
  friend class Fl_Image_Surface;
private:
  Fl_Image_Surface *image_surface_;
protected:
  int width;
  int height;
  Fl_Offscreen offscreen;
  int external_offscreen;
  Fl_Image_Surface_Driver(int w, int h, int /*high_res*/, Fl_Offscreen off) : Fl_Widget_Surface(NULL), width(w), height(h), offscreen(off) {external_offscreen = (off != 0);}
  virtual ~Fl_Image_Surface_Driver() {}
  static void copy_with_mask(Fl_RGB_Image* mask, uchar *dib_dst, uchar *dib_src,
                             int line_size, bool bottom_to_top);
  static Fl_RGB_Image *RGB3_to_RGB1(const Fl_RGB_Image *rgb3, int W, int H);
  void set_current() FL_OVERRIDE = 0;
  void translate(int x, int y) FL_OVERRIDE = 0;
  void untranslate() FL_OVERRIDE = 0;
  int printable_rect(int *w, int *h) FL_OVERRIDE;
  virtual Fl_RGB_Image *image() = 0;
  virtual void mask(const Fl_RGB_Image *) {}
  static Fl_Image_Surface_Driver *newImageSurfaceDriver(int w, int h, int high_res, Fl_Offscreen off);
public:
  Fl_Image_Surface *image_surface() { return image_surface_; }
};
 
#endif // Fl_Image_Surface_H