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Diffstat (limited to 'common/fltk/FL/Fl_Shared_Image.H')
| -rw-r--r-- | common/fltk/FL/Fl_Shared_Image.H | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/common/fltk/FL/Fl_Shared_Image.H b/common/fltk/FL/Fl_Shared_Image.H new file mode 100644 index 00000000..a6beb0dd --- /dev/null +++ b/common/fltk/FL/Fl_Shared_Image.H @@ -0,0 +1,114 @@ +// +// "$Id: Fl_Shared_Image.H 8306 2011-01-24 17:04:22Z matt $" +// +// Shared image header file for the Fast Light Tool Kit (FLTK). +// +// Copyright 1998-2010 by Bill Spitzak and others. +// +// This library is free software; you can redistribute it and/or +// modify it under the terms of the GNU Library General Public +// License as published by the Free Software Foundation; either +// version 2 of the License, or (at your option) any later version. +// +// This library is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +// Library General Public License for more details. +// +// You should have received a copy of the GNU Library General Public +// License along with this library; if not, write to the Free Software +// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 +// USA. +// +// Please report all bugs and problems on the following page: +// +// http://www.fltk.org/str.php +// + +/** \file + Fl_Shared_Image class. */ + +#ifndef Fl_Shared_Image_H +# define Fl_Shared_Image_H + +# include "Fl_Image.H" + + +// Test function for adding new formats +typedef Fl_Image *(*Fl_Shared_Handler)(const char *name, uchar *header, + int headerlen); + +// Shared images class. +/** + This class supports caching, loading, + and drawing of image files. Most applications will also want to + link against the fltk_images library and call the + fl_register_images() + function to support standard image formats such as BMP, GIF, JPEG, and PNG. +*/ +class FL_EXPORT Fl_Shared_Image : public Fl_Image { + + friend class Fl_JPEG_Image; + friend class Fl_PNG_Image; + +protected: + + static Fl_Shared_Image **images_; // Shared images + static int num_images_; // Number of shared images + static int alloc_images_; // Allocated shared images + static Fl_Shared_Handler *handlers_; // Additional format handlers + static int num_handlers_; // Number of format handlers + static int alloc_handlers_; // Allocated format handlers + + const char *name_; // Name of image file + int original_; // Original image? + int refcount_; // Number of times this image has been used + Fl_Image *image_; // The image that is shared + int alloc_image_; // Was the image allocated? + + static int compare(Fl_Shared_Image **i0, Fl_Shared_Image **i1); + + // Use get() and release() to load/delete images in memory... + Fl_Shared_Image(); + Fl_Shared_Image(const char *n, Fl_Image *img = 0); + virtual ~Fl_Shared_Image(); + void add(); + void update(); + + public: + /** Returns the filename of the shared image */ + const char *name() { return name_; } + /** Returns the number of references of this shared image. When reference is below 1, the image is deleted. */ + int refcount() { return refcount_; } + void release(); + void reload(); + + virtual Fl_Image *copy(int W, int H); + Fl_Image *copy() { return copy(w(), h()); } + virtual void color_average(Fl_Color c, float i); + virtual void desaturate(); + virtual void draw(int X, int Y, int W, int H, int cx, int cy); + void draw(int X, int Y) { draw(X, Y, w(), h(), 0, 0); } + virtual void uncache(); + + static Fl_Shared_Image *find(const char *n, int W = 0, int H = 0); + static Fl_Shared_Image *get(const char *n, int W = 0, int H = 0); + static Fl_Shared_Image **images(); + static int num_images(); + static void add_handler(Fl_Shared_Handler f); + static void remove_handler(Fl_Shared_Handler f); +}; + +// +// The following function is provided in the fltk_images library and +// registers all of the "extra" image file formats that are not part +// of the core FLTK library... +// + +FL_EXPORT extern void fl_register_images(); + +#endif // !Fl_Shared_Image_H + +// +// End of "$Id: Fl_Shared_Image.H 8306 2011-01-24 17:04:22Z matt $" +// |