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//
// "$Id$"
//
// 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:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.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/x.H> // for Fl_Offscreen
/** Directs all graphics requests to an Fl_Image.
After creation of an Fl_Image_Surface object, call set_current() on it, and all subsequent graphics requests
will be recorded in the image. It's possible to draw widgets (using Fl_Image_Surface::draw())
or to use any of the \ref fl_drawings or the \ref fl_attributes.
Finally, call image() on the object to obtain a newly allocated Fl_RGB_Image object.
<br> Fl_GL_Window objects can be drawn in the image as well.
<br> Usage example:
\code
Fl_Widget *g = ...; // a widget you want to draw in an image
Fl_Image_Surface *img_surf = new Fl_Image_Surface(g->w(), g->h()); // create an Fl_Image_Surface object
img_surf->set_current(); // direct graphics requests to the image
fl_color(FL_WHITE); fl_rectf(0, 0, g->w(), g->h()); // draw a white background
img_surf->draw(g); // draw the g widget in the image
Fl_RGB_Image* image = img_surf->image(); // get the resulting image
delete img_surf; // delete the img_surf object
Fl_Display_Device::display_device()->set_current(); // direct graphics requests back to the display
\endcode
*/
class FL_EXPORT Fl_Image_Surface : public Fl_Widget_Surface {
friend Fl_Offscreen fl_create_offscreen(int w, int h);
friend void fl_begin_offscreen(Fl_Offscreen ctx);
friend void fl_end_offscreen(void);
friend void fl_delete_offscreen(Fl_Offscreen ctx);
private:
class Helper;
Helper *platform_surface;
Fl_Offscreen offscreen();
protected:
void translate(int x, int y);
void untranslate();
public:
Fl_Image_Surface(int w, int h, int high_res = 0);
Fl_Image_Surface(Fl_Offscreen off, int w, int h);
~Fl_Image_Surface();
void set_current();
void end_current();
Fl_RGB_Image *image();
Fl_Shared_Image *highres_image();
void origin(int *x, int *y);
void origin(int x, int y);
int printable_rect(int *w, int *h);
Fl_Offscreen get_offscreen_before_delete();
};
#endif // Fl_Image_Surface_H
//
// End of "$Id$".
//
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