mirror of https://github.com/fltk/fltk
91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
//
|
|
// "$Id$"
|
|
//
|
|
// Draw-to-image code for the Fast Light Tool Kit (FLTK).
|
|
//
|
|
// Copyright 1998-2014 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_Copy_Surface.H>
|
|
#include <FL/Fl_Image.H>
|
|
|
|
|
|
/** 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_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_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_Image_Surface : public Fl_Surface_Device {
|
|
private:
|
|
Fl_Offscreen offscreen;
|
|
int width;
|
|
int height;
|
|
Fl_Paged_Device *helper;
|
|
#ifdef __APPLE__
|
|
#elif defined(WIN32)
|
|
HDC _sgc;
|
|
Window _sw;
|
|
Fl_Surface_Device *_ss;
|
|
int _savedc;
|
|
#else
|
|
Fl_Surface_Device *previous;
|
|
Window pre_window;
|
|
GC gc;
|
|
#endif
|
|
public:
|
|
static const char *class_id;
|
|
const char *class_name() {return class_id;};
|
|
Fl_Image_Surface(int w, int h);
|
|
~Fl_Image_Surface();
|
|
void set_current();
|
|
void draw(Fl_Widget*, int delta_x = 0, int delta_y = 0);
|
|
Fl_Image *image();
|
|
};
|
|
|
|
#ifdef __APPLE__
|
|
/* Mac class to implement translate()/untranslate() for a flipped bitmap graphics context */
|
|
class Fl_Quartz_Flipped_Surface_ : public Fl_Quartz_Surface_ {
|
|
public:
|
|
static const char *class_id;
|
|
const char *class_name() {return class_id;};
|
|
Fl_Quartz_Flipped_Surface_(int w, int h);
|
|
void translate(int x, int y);
|
|
void untranslate();
|
|
virtual ~Fl_Quartz_Flipped_Surface_() {};
|
|
};
|
|
#endif
|
|
|
|
#endif // Fl_Image_Surface_H
|
|
|
|
//
|
|
// End of "$Id$".
|
|
//
|