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FLTK 1.3.3
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Directs all graphics requests to an Fl_Image. More...
#include <Fl_Image_Surface.H>
Public Member Functions | |
| const char * | class_name () |
| Returns the name of the class of this object. More... | |
| void | draw (Fl_Widget *, int delta_x=0, int delta_y=0) |
| Draws a widget in the image surface. More... | |
| Fl_Image_Surface (int w, int h) | |
| The constructor. More... | |
| Fl_RGB_Image * | image () |
| Returns an image made of all drawings sent to the Fl_Image_Surface object. More... | |
| void | set_current () |
| Use this drawing surface for future graphics requests. More... | |
| ~Fl_Image_Surface () | |
| The destructor. | |
Public Member Functions inherited from Fl_Surface_Device | |
| void | driver (Fl_Graphics_Driver *graphics_driver) |
| Sets the graphics driver of this drawing surface. More... | |
| Fl_Graphics_Driver * | driver () |
| Returns the graphics driver of this drawing surface. More... | |
| virtual | ~Fl_Surface_Device () |
| The destructor. More... | |
Public Member Functions inherited from Fl_Device | |
| virtual | ~Fl_Device () |
| Virtual destructor. More... | |
Static Public Attributes | |
| static const char * | class_id = "Fl_Image_Surface" |
Static Public Attributes inherited from Fl_Surface_Device | |
| static const char * | class_id = "Fl_Surface_Device" |
Static Public Attributes inherited from Fl_Device | |
| static const char * | class_id = "Fl_Device" |
| A string that identifies each subclass of Fl_Device. More... | |
Additional Inherited Members | |
Static Public Member Functions inherited from Fl_Surface_Device | |
| static Fl_Surface_Device * | surface () |
| the surface that currently receives graphics output | |
Protected Member Functions inherited from Fl_Surface_Device | |
| Fl_Surface_Device (Fl_Graphics_Driver *graphics_driver) | |
| Constructor that sets the graphics driver to use for the created surface. More... | |
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 Drawing functions or the Color & Font functions. Finally, call image() on the object to obtain a newly allocated Fl_RGB_Image object.
Fl_GL_Window objects can be drawn in the image as well.
Usage example:
| Fl_Image_Surface::Fl_Image_Surface | ( | int | w, |
| int | h | ||
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The constructor.
| w | and |
| h | give the size in pixels of the resulting image. |
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inlinevirtual |
Returns the name of the class of this object.
Use of the class_name() function is discouraged because it will be removed from future FLTK versions.
The class of an instance of an Fl_Device subclass can be checked with code such as:
Reimplemented from Fl_Surface_Device.
| void Fl_Image_Surface::draw | ( | Fl_Widget * | widget, |
| int | delta_x = 0, |
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| int | delta_y = 0 |
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Draws a widget in the image surface.
| widget | any FLTK widget (e.g., standard, custom, window, GL view) to draw in the image |
| delta_x | and |
| delta_y | give the position in the image of the top-left corner of the widget |
| Fl_RGB_Image * Fl_Image_Surface::image | ( | ) |
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.
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virtual |
Use this drawing surface for future graphics requests.
Reimplemented from Fl_Surface_Device.