4f4a8fc3c7
(to clarify static exception LGPL by changing license references) git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@8864 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
98 lines
2.3 KiB
C++
98 lines
2.3 KiB
C++
//
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// "$Id$"
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//
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// FLTK images library core.
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//
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// Copyright 1997-2010 by Easy Software Products.
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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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// Contents:
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//
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// fl_register_images() - Register the image formats.
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// fl_check_images() - Check for a supported image format.
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//
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//
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// Include necessary header files...
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//
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#include <FL/Fl_Shared_Image.H>
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#include <FL/Fl_BMP_Image.H>
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#include <FL/Fl_GIF_Image.H>
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#include <FL/Fl_JPEG_Image.H>
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#include <FL/Fl_PNG_Image.H>
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#include <FL/Fl_PNM_Image.H>
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#include <stdio.h>
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#include <stdlib.h>
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#include "flstring.h"
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//
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// Define a simple global image registration function that registers
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// the extra image formats that aren't part of the core FLTK library.
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//
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static Fl_Image *fl_check_images(const char *name, uchar *header, int headerlen);
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/**
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\brief Register the image formats.
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*
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This function is provided in the fltk_images library and
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registers all of the "extra" image file formats that are not part
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of the core FLTK library.
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*/
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void fl_register_images() {
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Fl_Shared_Image::add_handler(fl_check_images);
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}
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//
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// 'fl_check_images()' - Check for a supported image format.
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//
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Fl_Image * // O - Image, if found
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fl_check_images(const char *name, // I - Filename
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uchar *header, // I - Header data from file
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int) { // I - Amount of data (not used)
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if (memcmp(header, "GIF87a", 6) == 0 ||
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memcmp(header, "GIF89a", 6) == 0) // GIF file
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return new Fl_GIF_Image(name);
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if (memcmp(header, "BM", 2) == 0) // BMP file
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return new Fl_BMP_Image(name);
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if (header[0] == 'P' && header[1] >= '1' && header[1] <= '7')
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// Portable anymap
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return new Fl_PNM_Image(name);
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#ifdef HAVE_LIBPNG
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if (memcmp(header, "\211PNG", 4) == 0)// PNG file
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return new Fl_PNG_Image(name);
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#endif // HAVE_LIBPNG
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#ifdef HAVE_LIBJPEG
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if (memcmp(header, "\377\330\377", 3) == 0 &&
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// Start-of-Image
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header[3] >= 0xc0 && header[3] <= 0xef)
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// APPn for JPEG file
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return new Fl_JPEG_Image(name);
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#endif // HAVE_LIBJPEG
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return 0;
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}
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//
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// End of "$Id$".
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//
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