f79c2375da
git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@2257 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
101 lines
2.6 KiB
C++
101 lines
2.6 KiB
C++
//
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// "$Id: Fl_JPEG_Image.cxx,v 1.1.2.5 2002/05/25 02:56:59 easysw Exp $"
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//
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// Fl_JPEG_Image routines.
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//
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// Copyright 1997-2002 by Easy Software Products.
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// Image support donated by Matthias Melcher, Copyright 2000.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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//
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// Please report all bugs and problems to "fltk-bugs@fltk.org".
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//
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// Contents:
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//
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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_JPEG_Image.H>
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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extern "C"
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{
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#ifdef HAVE_LIBJPEG
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# include <jpeglib.h>
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#endif // HAVE_LIBJPEG
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}
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//
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// 'Fl_JPEG_Image::Fl_JPEG_Image()' - Load a JPEG image file.
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//
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Fl_JPEG_Image::Fl_JPEG_Image(const char *jpeg) // I - File to load
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: Fl_RGB_Image(0,0,0) {
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#ifdef HAVE_LIBJPEG
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FILE *fp; // File pointer
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struct jpeg_decompress_struct cinfo; // Decompressor info
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struct jpeg_error_mgr jerr; // Error handler info
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JSAMPROW row; // Sample row pointer
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if ((fp = fopen(jpeg, "rb")) == NULL) return;
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cinfo.err = jpeg_std_error(&jerr);
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jpeg_create_decompress(&cinfo);
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jpeg_stdio_src(&cinfo, fp);
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jpeg_read_header(&cinfo, 1);
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cinfo.quantize_colors = (boolean)FALSE;
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cinfo.out_color_space = JCS_RGB;
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cinfo.out_color_components = 3;
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cinfo.output_components = 3;
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jpeg_calc_output_dimensions(&cinfo);
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w(cinfo.output_width);
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h(cinfo.output_height);
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d(cinfo.output_components);
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array = new uchar[w() * h() * d()];
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alloc_array = 1;
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jpeg_start_decompress(&cinfo);
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while (cinfo.output_scanline < cinfo.output_height)
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{
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row = (JSAMPROW)(array +
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cinfo.output_scanline * cinfo.output_width *
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cinfo.output_components);
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jpeg_read_scanlines(&cinfo, &row, (JDIMENSION)1);
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}
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jpeg_finish_decompress(&cinfo);
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jpeg_destroy_decompress(&cinfo);
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fclose(fp);
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#endif // HAVE_LIBJPEG
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}
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//
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// End of "$Id: Fl_JPEG_Image.cxx,v 1.1.2.5 2002/05/25 02:56:59 easysw Exp $".
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//
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