2 // "$Id: Fl_Shared_Image.H 8306 2011-01-24 17:04:22Z matt $"
4 // Shared image header file for the Fast Light Tool Kit (FLTK).
6 // Copyright 1998-2010 by Bill Spitzak and others.
8 // This library is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU Library General Public
10 // License as published by the Free Software Foundation; either
11 // version 2 of the License, or (at your option) any later version.
13 // This library is distributed in the hope that it will be useful,
14 // but WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // Library General Public License for more details.
18 // You should have received a copy of the GNU Library General Public
19 // License along with this library; if not, write to the Free Software
20 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
23 // Please report all bugs and problems on the following page:
25 // http://www.fltk.org/str.php
29 Fl_Shared_Image class. */
31 #ifndef Fl_Shared_Image_H
32 # define Fl_Shared_Image_H
34 # include "Fl_Image.H"
37 // Test function for adding new formats
38 typedef Fl_Image *(*Fl_Shared_Handler)(const char *name, uchar *header,
41 // Shared images class.
43 This class supports caching, loading,
44 and drawing of image files. Most applications will also want to
45 link against the fltk_images library and call the
47 function to support standard image formats such as BMP, GIF, JPEG, and PNG.
49 class FL_EXPORT Fl_Shared_Image : public Fl_Image {
51 friend class Fl_JPEG_Image;
52 friend class Fl_PNG_Image;
56 static Fl_Shared_Image **images_; // Shared images
57 static int num_images_; // Number of shared images
58 static int alloc_images_; // Allocated shared images
59 static Fl_Shared_Handler *handlers_; // Additional format handlers
60 static int num_handlers_; // Number of format handlers
61 static int alloc_handlers_; // Allocated format handlers
63 const char *name_; // Name of image file
64 int original_; // Original image?
65 int refcount_; // Number of times this image has been used
66 Fl_Image *image_; // The image that is shared
67 int alloc_image_; // Was the image allocated?
69 static int compare(Fl_Shared_Image **i0, Fl_Shared_Image **i1);
71 // Use get() and release() to load/delete images in memory...
73 Fl_Shared_Image(const char *n, Fl_Image *img = 0);
74 virtual ~Fl_Shared_Image();
79 /** Returns the filename of the shared image */
80 const char *name() { return name_; }
81 /** Returns the number of references of this shared image. When reference is below 1, the image is deleted. */
82 int refcount() { return refcount_; }
86 virtual Fl_Image *copy(int W, int H);
87 Fl_Image *copy() { return copy(w(), h()); }
88 virtual void color_average(Fl_Color c, float i);
89 virtual void desaturate();
90 virtual void draw(int X, int Y, int W, int H, int cx, int cy);
91 void draw(int X, int Y) { draw(X, Y, w(), h(), 0, 0); }
92 virtual void uncache();
94 static Fl_Shared_Image *find(const char *n, int W = 0, int H = 0);
95 static Fl_Shared_Image *get(const char *n, int W = 0, int H = 0);
96 static Fl_Shared_Image **images();
97 static int num_images();
98 static void add_handler(Fl_Shared_Handler f);
99 static void remove_handler(Fl_Shared_Handler f);
103 // The following function is provided in the fltk_images library and
104 // registers all of the "extra" image file formats that are not part
105 // of the core FLTK library...
108 FL_EXPORT extern void fl_register_images();
110 #endif // !Fl_Shared_Image_H
113 // End of "$Id: Fl_Shared_Image.H 8306 2011-01-24 17:04:22Z matt $"