Fixed unfinished edit of xlib.H
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3-porting@11030 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
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Matthias Melcher
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cdf6493d95
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@ -84,103 +84,6 @@ protected:
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void restore_clip();
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};
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#endif
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/**
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A drawing surface that's susceptible to receive graphical output.
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Any FLTK application has at any time a current drawing surface to which all drawing requests are directed.
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The current surface is given by Fl_Surface_Device::surface().
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When main() begins running, the current drawing surface has been set to the computer's display,
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an instance of the Fl_Display_Device class.
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A drawing surface other than the computer's display, is typically used as follows:
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<ol><li> Create \c surface, an object from a particular Fl_Surface_Device derived class (e.g., Fl_Copy_Surface, Fl_Printer).
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<li> Memorize what is the current drawing surface with <tt> Fl_Surface_Device *old_current = Fl_Surface_Device::surface();</tt>
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<li> Call \c surface->set_current(); to redirect all graphics requests to \c surface which becomes the new
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current drawing surface (not necessary with class Fl_Printer because it is done by Fl_Printer::start_job()).
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<li> At this point any of the \ref fl_drawings (e.g., fl_rect()) or the \ref fl_attributes or \ref drawing_images functions
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(e.g., fl_draw_image(), Fl_Image::draw()) operates on the new current drawing surface.
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Certain drawing surfaces allow additional ways to draw to them (e.g., Fl_Printer::print_widget(), Fl_Image_Surface::draw()).
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<li> After all drawing requests have been performed, redirect graphics requests back to their previous destination
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with \c old_current->set_current();.
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<li> Delete \c surface.
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</ol>
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*/
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class FL_EXPORT Fl_Surface_Device : public Fl_Device {
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/** \brief The graphics driver in use by this surface. */
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Fl_Graphics_Driver *_driver;
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static Fl_Surface_Device *_surface; // the surface that currently receives graphics output
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static Fl_Surface_Device *default_surface(); // create surface is none exists yet
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protected:
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/** \brief Constructor that sets the graphics driver to use for the created surface. */
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Fl_Surface_Device(Fl_Graphics_Driver *graphics_driver) {_driver = graphics_driver; };
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public:
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static const char *class_id;
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const char *class_name() {return class_id;};
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virtual void set_current(void);
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/** \brief Sets the graphics driver of this drawing surface. */
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inline void driver(Fl_Graphics_Driver *graphics_driver) {_driver = graphics_driver;};
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/** \brief Returns the graphics driver of this drawing surface. */
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inline Fl_Graphics_Driver *driver() {return _driver; };
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/** The current drawing surface.
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In other words, the Fl_Surface_Device object that currently receives all graphics output */
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static inline Fl_Surface_Device *surface() {
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return _surface ? _surface : default_surface();
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};
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/** \brief The destructor. */
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virtual ~Fl_Surface_Device() {}
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};
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/**
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A display to which the computer can draw.
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When the program begins running, an Fl_Display_Device instance has been created and made the current drawing surface.
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There is no need to create any other object of this class.
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*/
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class FL_EXPORT Fl_Display_Device : public Fl_Surface_Device {
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friend class Fl_Quartz_Graphics_Driver;
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static Fl_Display_Device *_display; // the platform display device
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#ifdef __APPLE__
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friend class Fl_X;
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friend class Fl_Graphics_Driver;
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static bool high_res_window_; //< true when drawing to a window of a retina display (Mac OS X only)
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static bool high_resolution() {return high_res_window_;}
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#elif defined(WIN32)
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#elif defined(FL_PORTING)
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# pragma message "FL_PORTING: implement functions for extra high res drawing if your platform supports it"
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#else
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#endif
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public:
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static const char *class_id;
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const char *class_name() {return class_id;};
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Fl_Display_Device(Fl_Graphics_Driver *graphics_driver);
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static Fl_Display_Device *display_device();
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};
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/**
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This plugin socket allows the integration of new device drivers for special
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window or screen types. It is currently used to provide an automated printing
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service and screen capture for OpenGL windows, if linked with fltk_gl.
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*/
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class FL_EXPORT Fl_Device_Plugin : public Fl_Plugin {
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public:
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/** \brief The constructor */
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Fl_Device_Plugin(const char *pluginName)
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: Fl_Plugin(klass(), pluginName) { }
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/** \brief Returns the class name */
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virtual const char *klass() { return "fltk:device"; }
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/** \brief Returns the plugin name */
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virtual const char *name() = 0;
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/** \brief Prints a widget
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\param w the widget
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\param x,y offsets where to print relatively to coordinates origin
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\param height height of the current drawing area
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*/
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virtual int print(Fl_Widget* w, int x, int y, int height) = 0;
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/** captures a rectangle of a widget as an image
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\return The captured pixels as an RGB image
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*/
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virtual Fl_RGB_Image* rectangle_capture(Fl_Widget *widget, int x, int y, int w, int h) = 0;
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};
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#endif // FL_CFG_GFX_XLIB_H
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