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//
// "$Id$"
//
// implementation of Fl_Device class for the Fast Light Tool Kit (FLTK).
//
// Copyright 2010-2016 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 to:
//
// http://www.fltk.org/str.php
//
#include <FL/Fl.H>
#include "config_lib.h"
#include <FL/Fl_Device.H>
#include <FL/Fl_Graphics_Driver.H>
/* Attempt at an inheritance diagram.
+- Fl_Surface_Device: any kind of surface that we can draw onto -> uses an Fl_Graphics_Driver
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+- Fl_Display_Device: some kind of video device
+- Fl_Copy_Surface: create an image for dnd or copy/paste
+- Fl_Image_Surface: create an RGB Image
+- Fl_Paged_Device: output to a printer or similar
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+- Fl_..._Surface_: platform specific driver
+- Fl_Printer: user can instantiate this to gain access to a printer
+- Fl_System_Printer:
+- Fl_PostScript_File_Device
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+- Fl_PostScript_Printer
+- Fl_Graphics_Driver
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+- Fl_..._Graphics_Driver: platform specific graphics driver
TODO:
Window Device to handle creation of surfaces and manage events
System Device to handle file system acces, standard dialogs, etc.
*/
Fl_Surface_Device *Fl_Surface_Device::pre_surface_ = NULL;
/** \brief Make this surface the current drawing surface.
This surface will receive all future graphics requests. */
void Fl_Surface_Device::set_current(void)
{
if (pre_surface_) pre_surface_->end_current_();
fl_graphics_driver = pGraphicsDriver;
surface_ = this;
pGraphicsDriver->global_gc();
pre_surface_ = this;
}
Fl_Surface_Device* Fl_Surface_Device::surface_; // the current target surface of graphics operations
Fl_Surface_Device::~Fl_Surface_Device()
{
if (pre_surface_ == this) pre_surface_ = NULL;
}
/** A constructor that sets the graphics driver used by the display */
Fl_Display_Device::Fl_Display_Device(Fl_Graphics_Driver *graphics_driver) : Fl_Surface_Device(graphics_driver) {
this->set_current();
};
/** Returns a pointer to the unique display device */
Fl_Display_Device *Fl_Display_Device::display_device() {
static Fl_Display_Device *display = new Fl_Display_Device(Fl_Graphics_Driver::newMainGraphicsDriver());
return display;
};
Fl_Surface_Device *Fl_Surface_Device::default_surface()
{
return Fl_Display_Device::display_device();
}
//
// End of "$Id$".
//
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