ref: 75e062c7753c7dd4229f00932ffa34f87fd7fead
dir: /DoConfig/fltk/src/fl_images_core.cxx/
// // "$Id$" // // FLTK images library core. // // Copyright 1997-2010 by Easy Software Products. // // This library is free software. Distribution and use rights are outlined in // the file "COPYING" which should have been included with this file. If this // file is missing or damaged, see the license at: // // http://www.fltk.org/COPYING.php // // Please report all bugs and problems on the following page: // // http://www.fltk.org/str.php // // Contents: // // fl_register_images() - Register the image formats. // fl_check_images() - Check for a supported image format. // // // Include necessary header files... // #include <FL/Fl_Shared_Image.H> #include <FL/Fl_BMP_Image.H> #include <FL/Fl_GIF_Image.H> #include <FL/Fl_JPEG_Image.H> #include <FL/Fl_PNG_Image.H> #include <FL/Fl_PNM_Image.H> #include <stdio.h> #include <stdlib.h> #include "flstring.h" // // Define a simple global image registration function that registers // the extra image formats that aren't part of the core FLTK library. // static Fl_Image *fl_check_images(const char *name, uchar *header, int headerlen); /** \brief Register the image formats. * This 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. */ void fl_register_images() { Fl_Shared_Image::add_handler(fl_check_images); } // // 'fl_check_images()' - Check for a supported image format. // Fl_Image * // O - Image, if found fl_check_images(const char *name, // I - Filename uchar *header, // I - Header data from file int) { // I - Amount of data (not used) if (memcmp(header, "GIF87a", 6) == 0 || memcmp(header, "GIF89a", 6) == 0) // GIF file return new Fl_GIF_Image(name); if (memcmp(header, "BM", 2) == 0) // BMP file return new Fl_BMP_Image(name); if (header[0] == 'P' && header[1] >= '1' && header[1] <= '7') // Portable anymap return new Fl_PNM_Image(name); #ifdef HAVE_LIBPNG if (memcmp(header, "\211PNG", 4) == 0)// PNG file return new Fl_PNG_Image(name); #endif // HAVE_LIBPNG #ifdef HAVE_LIBJPEG if (memcmp(header, "\377\330\377", 3) == 0 && // Start-of-Image header[3] >= 0xc0 && header[3] <= 0xef) // APPn for JPEG file return new Fl_JPEG_Image(name); #endif // HAVE_LIBJPEG return 0; } // // End of "$Id$". //