682f950796
This simplifies the implementation of Fl_Copy_Surface and Fl_Image_Surface which now are made to derive from Fl_Widget_Surface. git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11220 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
80 lines
2.4 KiB
C++
80 lines
2.4 KiB
C++
//
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// "$Id$"
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//
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// Draw-to-image code for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2016 by Bill Spitzak and others.
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//
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// This library is free software. Distribution and use rights are outlined in
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// the file "COPYING" which should have been included with this file. If this
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// file is missing or damaged, see the license at:
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//
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// http://www.fltk.org/COPYING.php
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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#ifndef Fl_Image_Surface_H
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#define Fl_Image_Surface_H
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#include <FL/Fl_Copy_Surface.H>
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#include <FL/Fl_Image.H>
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#include <FL/Fl_Shared_Image.H>
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/** Directs all graphics requests to an Fl_Image.
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After creation of an Fl_Image_Surface object, call set_current() on it, and all subsequent graphics requests
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will be recorded in the image. It's possible to draw widgets (using Fl_Image_Surface::draw())
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or to use any of the \ref fl_drawings or the \ref fl_attributes.
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Finally, call image() on the object to obtain a newly allocated Fl_RGB_Image object.
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<br> Fl_GL_Window objects can be drawn in the image as well.
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<br> Usage example:
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\code
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Fl_Widget *g = ...; // a widget you want to draw in an image
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Fl_Image_Surface *img_surf = new Fl_Image_Surface(g->w(), g->h()); // create an Fl_Image_Surface object
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img_surf->set_current(); // direct graphics requests to the image
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fl_color(FL_WHITE); fl_rectf(0, 0, g->w(), g->h()); // draw a white background
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img_surf->draw(g); // draw the g widget in the image
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Fl_RGB_Image* image = img_surf->image(); // get the resulting image
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delete img_surf; // delete the img_surf object
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Fl_Display_Device::display_device()->set_current(); // direct graphics requests back to the display
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\endcode
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*/
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class FL_EXPORT Fl_Image_Surface : public Fl_Widget_Surface {
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private:
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Fl_Offscreen offscreen;
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int width;
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int height;
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#ifdef __APPLE__ // PORTME: Fl_Surface_Driver - platform image surface driver
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#elif defined(WIN32)
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HDC _sgc;
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Window _sw;
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Fl_Surface_Device *_ss;
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int _savedc;
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#elif defined(FL_PORTING)
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# pragma message "FL_PORTING: define variables to hold image data for Fl_Image_Surface"
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#else
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Fl_Surface_Device *previous;
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Window pre_window;
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#endif
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protected:
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void translate(int x, int y);
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void untranslate();
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public:
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Fl_Image_Surface(int w, int h, int highres = 0);
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~Fl_Image_Surface();
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void set_current();
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Fl_RGB_Image *image();
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Fl_Shared_Image *highres_image();
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};
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#endif // Fl_Image_Surface_H
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//
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// End of "$Id$".
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//
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