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//
// "$Id$"
//
// 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
//
#include <FL/Fl_Image_Surface.H>
#include <FL/Fl_Printer.H>
#include <FL/Fl.H>
const char *Fl_Image_Surface::class_id = "Fl_Image_Surface";
/** The constructor.
\param w and \param h give the size in pixels of the resulting image.
*/
Fl_Image_Surface::Fl_Image_Surface(int w, int h) : Fl_Surface_Device(NULL) {
width = w;
height = h;
#if !(defined(__APPLE__) || defined(WIN32))
gc = 0;
if (!fl_display) { // allows use of this class before any window is shown
fl_open_display();
gc = XCreateGC(fl_display, RootWindow(fl_display, fl_screen), 0, 0);
fl_gc = gc;
}
#endif
offscreen = fl_create_offscreen(w, h);
#ifdef __APPLE__
helper = new Fl_Quartz_Flipped_Surface_(width, height);
driver(helper->driver());
#elif defined(WIN32)
helper = new Fl_GDI_Surface_();
driver(helper->driver());
#else
helper = new Fl_Xlib_Surface_();
driver(helper->driver());
#endif
}
/** The destructor.
*/
Fl_Image_Surface::~Fl_Image_Surface() {
fl_delete_offscreen(offscreen);
#ifdef __APPLE__
delete (Fl_Quartz_Flipped_Surface_*)helper;
#elif defined(WIN32)
delete (Fl_GDI_Surface_*)helper;
#else
if (gc) { XFreeGC(fl_display, gc); fl_gc = 0; }
delete (Fl_Xlib_Surface_*)helper;
#endif
}
/** Returns an image made of all drawings sent to the Fl_Image_Surface object.
The returned object contains its own copy of the RGB data.
*/
Fl_RGB_Image* Fl_Image_Surface::image()
{
unsigned char *data;
#ifdef __APPLE__
CGContextFlush(offscreen);
data = fl_read_image(NULL, 0, 0, width, height, 0);
fl_end_offscreen();
#elif defined(WIN32)
fl_pop_clip();
data = fl_read_image(NULL, 0, 0, width, height, 0);
RestoreDC(fl_gc, _savedc);
DeleteDC(fl_gc);
_ss->set_current();
fl_window=_sw;
fl_gc = _sgc;
#else
fl_pop_clip();
data = fl_read_image(NULL, 0, 0, width, height, 0);
fl_window = pre_window;
previous->set_current();
#endif
Fl_RGB_Image *image = new Fl_RGB_Image(data, width, height);
image->alloc_array = 1;
return image;
}
/** Draws a widget in the image surface
\param widget any FLTK widget (e.g., standard, custom, window, GL view) to draw in the image
\param delta_x and \param delta_y give
the position in the image of the top-left corner of the widget
*/
void Fl_Image_Surface::draw(Fl_Widget *widget, int delta_x, int delta_y)
{
helper->print_widget(widget, delta_x, delta_y);
}
void Fl_Image_Surface::set_current()
{
#if defined(__APPLE__)
fl_begin_offscreen(offscreen);
fl_pop_clip();
Fl_Surface_Device::set_current();
fl_push_no_clip();
#elif defined(WIN32)
_sgc=fl_gc;
_sw=fl_window;
_ss = Fl_Surface_Device::surface();
Fl_Surface_Device::set_current();
fl_gc = fl_makeDC(offscreen);
_savedc = SaveDC(fl_gc);
fl_window=(HWND)offscreen;
fl_push_no_clip();
#else
pre_window = fl_window;
fl_window = offscreen;
previous = Fl_Surface_Device::surface();
Fl_Surface_Device::set_current();
fl_push_no_clip();
#endif
}
#if defined(__APPLE__)
Fl_Quartz_Flipped_Surface_::Fl_Quartz_Flipped_Surface_(int w, int h) : Fl_Quartz_Surface_(w, h) {
}
void Fl_Quartz_Flipped_Surface_::translate(int x, int y) {
CGContextRestoreGState(fl_gc);
CGContextSaveGState(fl_gc);
CGContextTranslateCTM(fl_gc, x, -y);
CGContextSaveGState(fl_gc);
CGContextTranslateCTM(fl_gc, 0, height);
CGContextScaleCTM(fl_gc, 1.0f, -1.0f);
}
void Fl_Quartz_Flipped_Surface_::untranslate() {
CGContextRestoreGState(fl_gc);
}
const char *Fl_Quartz_Flipped_Surface_::class_id = "Fl_Quartz_Flipped_Surface_";
#endif // __APPLE__
//
// End of "$Id$".
//
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