560 lines
18 KiB
C++
560 lines
18 KiB
C++
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/*M///////////////////////////////////////////////////////////////////////////////////////
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//
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// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
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//
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// By downloading, copying, installing or using the software you agree to this license.
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// If you do not agree to this license, do not download, install,
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// copy or use the software.
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//
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//
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// License Agreement
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// For Open Source Computer Vision Library
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//
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
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// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
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// Third party copyrights are property of their respective owners.
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//
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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//
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// * Redistribution's of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// * Redistribution's in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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//
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// * The name of the copyright holders may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// This software is provided by the copyright holders and contributors "as is" and
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// any express or implied warranties, including, but not limited to, the implied
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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// In no event shall the Intel Corporation or contributors be liable for any direct,
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// indirect, incidental, special, exemplary, or consequential damages
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// (including, but not limited to, procurement of substitute goods or services;
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// loss of use, data, or profits; or business interruption) however caused
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// and on any theory of liability, whether in contract, strict liability,
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// or tort (including negligence or otherwise) arising in any way out of
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// the use of this software, even if advised of the possibility of such damage.
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//
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//M*/
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#include "precomp.hpp"
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#include "grfmt_bmp.hpp"
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namespace cv
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{
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static const char* fmtSignBmp = "BM";
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/************************ BMP decoder *****************************/
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BmpDecoder::BmpDecoder()
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{
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m_signature = fmtSignBmp;
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m_offset = -1;
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m_buf_supported = true;
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}
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BmpDecoder::~BmpDecoder()
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{
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}
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void BmpDecoder::close()
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{
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m_strm.close();
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}
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ImageDecoder BmpDecoder::newDecoder() const
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{
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return new BmpDecoder;
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}
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bool BmpDecoder::readHeader()
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{
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bool result = false;
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bool iscolor = false;
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if( !m_buf.empty() )
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{
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if( !m_strm.open( m_buf ) )
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return false;
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}
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else if( !m_strm.open( m_filename ))
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return false;
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try
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{
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m_strm.skip( 10 );
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m_offset = m_strm.getDWord();
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int size = m_strm.getDWord();
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if( size >= 36 )
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{
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m_width = m_strm.getDWord();
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m_height = m_strm.getDWord();
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m_bpp = m_strm.getDWord() >> 16;
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m_rle_code = (BmpCompression)m_strm.getDWord();
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m_strm.skip(12);
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int clrused = m_strm.getDWord();
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m_strm.skip( size - 36 );
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if( m_width > 0 && m_height > 0 &&
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(((m_bpp == 1 || m_bpp == 4 || m_bpp == 8 ||
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m_bpp == 24 || m_bpp == 32 ) && m_rle_code == BMP_RGB) ||
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(m_bpp == 16 && (m_rle_code == BMP_RGB || m_rle_code == BMP_BITFIELDS)) ||
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(m_bpp == 4 && m_rle_code == BMP_RLE4) ||
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(m_bpp == 8 && m_rle_code == BMP_RLE8)))
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{
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iscolor = true;
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result = true;
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if( m_bpp <= 8 )
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{
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memset( m_palette, 0, sizeof(m_palette));
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m_strm.getBytes( m_palette, (clrused == 0? 1<<m_bpp : clrused)*4 );
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iscolor = IsColorPalette( m_palette, m_bpp );
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}
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else if( m_bpp == 16 && m_rle_code == BMP_BITFIELDS )
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{
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int redmask = m_strm.getDWord();
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int greenmask = m_strm.getDWord();
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int bluemask = m_strm.getDWord();
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if( bluemask == 0x1f && greenmask == 0x3e0 && redmask == 0x7c00 )
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m_bpp = 15;
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else if( bluemask == 0x1f && greenmask == 0x7e0 && redmask == 0xf800 )
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;
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else
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result = false;
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}
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else if( m_bpp == 16 && m_rle_code == BMP_RGB )
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m_bpp = 15;
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}
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}
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else if( size == 12 )
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{
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m_width = m_strm.getWord();
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m_height = m_strm.getWord();
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m_bpp = m_strm.getDWord() >> 16;
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m_rle_code = BMP_RGB;
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if( m_width > 0 && m_height > 0 &&
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(m_bpp == 1 || m_bpp == 4 || m_bpp == 8 ||
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m_bpp == 24 || m_bpp == 32 ))
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{
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if( m_bpp <= 8 )
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{
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uchar buffer[256*3];
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int j, clrused = 1 << m_bpp;
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m_strm.getBytes( buffer, clrused*3 );
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for( j = 0; j < clrused; j++ )
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{
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m_palette[j].b = buffer[3*j+0];
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m_palette[j].g = buffer[3*j+1];
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m_palette[j].r = buffer[3*j+2];
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}
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}
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result = true;
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}
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}
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}
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catch(...)
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{
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}
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m_type = iscolor ? CV_8UC3 : CV_8UC1;
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if( !result )
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{
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m_offset = -1;
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m_width = m_height = -1;
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m_strm.close();
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}
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return result;
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}
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bool BmpDecoder::readData( Mat& img )
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{
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uchar* data = img.data;
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int step = img.step;
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bool color = img.channels() > 1;
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uchar gray_palette[256];
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bool result = false;
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int src_pitch = ((m_width*(m_bpp != 15 ? m_bpp : 16) + 7)/8 + 3) & -4;
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int nch = color ? 3 : 1;
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int y, width3 = m_width*nch;
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if( m_offset < 0 || !m_strm.isOpened())
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return false;
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data += (m_height - 1)*step;
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step = -step;
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AutoBuffer<uchar> _src, _bgr;
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if( (m_bpp != 24 || !color) )
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_src.allocate(src_pitch + 32);
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if( !color )
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{
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if( m_bpp <= 8 )
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{
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CvtPaletteToGray( m_palette, gray_palette, 1 << m_bpp );
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}
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_bgr.allocate(m_width*3 + 32);
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}
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uchar *src = _src, *bgr = _bgr;
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try
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{
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m_strm.setPos( m_offset );
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switch( m_bpp )
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{
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/************************* 1 BPP ************************/
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case 1:
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for( y = 0; y < m_height; y++, data += step )
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{
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m_strm.getBytes( src, src_pitch );
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FillColorRow1( color ? data : bgr, src, m_width, m_palette );
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if( !color )
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icvCvt_BGR2Gray_8u_C3C1R( bgr, 0, data, 0, cvSize(m_width,1) );
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}
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result = true;
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break;
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/************************* 4 BPP ************************/
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case 4:
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if( m_rle_code == BMP_RGB )
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{
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for( y = 0; y < m_height; y++, data += step )
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{
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m_strm.getBytes( src, src_pitch );
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if( color )
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FillColorRow4( data, src, m_width, m_palette );
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else
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FillGrayRow4( data, src, m_width, gray_palette );
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}
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result = true;
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}
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else if( m_rle_code == BMP_RLE4 ) // rle4 compression
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{
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uchar* line_end = data + width3;
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y = 0;
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for(;;)
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{
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int code = m_strm.getWord();
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int len = code & 255;
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code >>= 8;
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if( len != 0 ) // encoded mode
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{
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PaletteEntry clr[2];
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uchar gray_clr[2];
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int t = 0;
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clr[0] = m_palette[code >> 4];
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clr[1] = m_palette[code & 15];
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gray_clr[0] = gray_palette[code >> 4];
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gray_clr[1] = gray_palette[code & 15];
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uchar* end = data + len*nch;
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if( end > line_end ) goto decode_rle4_bad;
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do
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{
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if( color )
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WRITE_PIX( data, clr[t] );
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else
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*data = gray_clr[t];
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t ^= 1;
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}
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while( (data += nch) < end );
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}
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else if( code > 2 ) // absolute mode
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{
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if( data + code*nch > line_end ) goto decode_rle4_bad;
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m_strm.getBytes( src, (((code + 1)>>1) + 1) & -2 );
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if( color )
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data = FillColorRow4( data, src, code, m_palette );
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else
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data = FillGrayRow4( data, src, code, gray_palette );
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}
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else
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{
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int x_shift3 = (int)(line_end - data);
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int y_shift = m_height - y;
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if( code == 2 )
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{
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x_shift3 = m_strm.getByte()*nch;
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y_shift = m_strm.getByte();
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}
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len = x_shift3 + ((y_shift * width3) & ((code == 0) - 1));
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if( color )
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data = FillUniColor( data, line_end, step, width3,
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y, m_height, x_shift3,
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m_palette[0] );
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else
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data = FillUniGray( data, line_end, step, width3,
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y, m_height, x_shift3,
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gray_palette[0] );
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if( y >= m_height )
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break;
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}
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}
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result = true;
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decode_rle4_bad: ;
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}
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break;
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/************************* 8 BPP ************************/
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case 8:
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if( m_rle_code == BMP_RGB )
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{
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for( y = 0; y < m_height; y++, data += step )
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{
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m_strm.getBytes( src, src_pitch );
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if( color )
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FillColorRow8( data, src, m_width, m_palette );
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else
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FillGrayRow8( data, src, m_width, gray_palette );
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}
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result = true;
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}
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else if( m_rle_code == BMP_RLE8 ) // rle8 compression
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{
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uchar* line_end = data + width3;
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int line_end_flag = 0;
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y = 0;
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for(;;)
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{
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int code = m_strm.getWord();
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int len = code & 255;
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code >>= 8;
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if( len != 0 ) // encoded mode
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{
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int prev_y = y;
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len *= nch;
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if( data + len > line_end )
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goto decode_rle8_bad;
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if( color )
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data = FillUniColor( data, line_end, step, width3,
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y, m_height, len,
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m_palette[code] );
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else
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data = FillUniGray( data, line_end, step, width3,
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y, m_height, len,
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gray_palette[code] );
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line_end_flag = y - prev_y;
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}
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else if( code > 2 ) // absolute mode
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{
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int prev_y = y;
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int code3 = code*nch;
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if( data + code3 > line_end )
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goto decode_rle8_bad;
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m_strm.getBytes( src, (code + 1) & -2 );
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if( color )
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data = FillColorRow8( data, src, code, m_palette );
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else
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data = FillGrayRow8( data, src, code, gray_palette );
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line_end_flag = y - prev_y;
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}
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else
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{
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int x_shift3 = (int)(line_end - data);
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int y_shift = m_height - y;
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|
|
||
|
|
if( code || !line_end_flag || x_shift3 < width3 )
|
||
|
|
{
|
||
|
|
if( code == 2 )
|
||
|
|
{
|
||
|
|
x_shift3 = m_strm.getByte()*nch;
|
||
|
|
y_shift = m_strm.getByte();
|
||
|
|
}
|
||
|
|
|
||
|
|
x_shift3 += (y_shift * width3) & ((code == 0) - 1);
|
||
|
|
|
||
|
|
if( y >= m_height )
|
||
|
|
break;
|
||
|
|
|
||
|
|
if( color )
|
||
|
|
data = FillUniColor( data, line_end, step, width3,
|
||
|
|
y, m_height, x_shift3,
|
||
|
|
m_palette[0] );
|
||
|
|
else
|
||
|
|
data = FillUniGray( data, line_end, step, width3,
|
||
|
|
y, m_height, x_shift3,
|
||
|
|
gray_palette[0] );
|
||
|
|
|
||
|
|
if( y >= m_height )
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
line_end_flag = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
result = true;
|
||
|
|
decode_rle8_bad: ;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
/************************* 15 BPP ************************/
|
||
|
|
case 15:
|
||
|
|
for( y = 0; y < m_height; y++, data += step )
|
||
|
|
{
|
||
|
|
m_strm.getBytes( src, src_pitch );
|
||
|
|
if( !color )
|
||
|
|
icvCvt_BGR5552Gray_8u_C2C1R( src, 0, data, 0, cvSize(m_width,1) );
|
||
|
|
else
|
||
|
|
icvCvt_BGR5552BGR_8u_C2C3R( src, 0, data, 0, cvSize(m_width,1) );
|
||
|
|
}
|
||
|
|
result = true;
|
||
|
|
break;
|
||
|
|
/************************* 16 BPP ************************/
|
||
|
|
case 16:
|
||
|
|
for( y = 0; y < m_height; y++, data += step )
|
||
|
|
{
|
||
|
|
m_strm.getBytes( src, src_pitch );
|
||
|
|
if( !color )
|
||
|
|
icvCvt_BGR5652Gray_8u_C2C1R( src, 0, data, 0, cvSize(m_width,1) );
|
||
|
|
else
|
||
|
|
icvCvt_BGR5652BGR_8u_C2C3R( src, 0, data, 0, cvSize(m_width,1) );
|
||
|
|
}
|
||
|
|
result = true;
|
||
|
|
break;
|
||
|
|
/************************* 24 BPP ************************/
|
||
|
|
case 24:
|
||
|
|
for( y = 0; y < m_height; y++, data += step )
|
||
|
|
{
|
||
|
|
m_strm.getBytes( src, src_pitch );
|
||
|
|
if(!color)
|
||
|
|
icvCvt_BGR2Gray_8u_C3C1R( src, 0, data, 0, cvSize(m_width,1) );
|
||
|
|
else
|
||
|
|
memcpy( data, src, m_width*3 );
|
||
|
|
}
|
||
|
|
result = true;
|
||
|
|
break;
|
||
|
|
/************************* 32 BPP ************************/
|
||
|
|
case 32:
|
||
|
|
for( y = 0; y < m_height; y++, data += step )
|
||
|
|
{
|
||
|
|
m_strm.getBytes( src, src_pitch );
|
||
|
|
|
||
|
|
if( !color )
|
||
|
|
icvCvt_BGRA2Gray_8u_C4C1R( src, 0, data, 0, cvSize(m_width,1) );
|
||
|
|
else
|
||
|
|
icvCvt_BGRA2BGR_8u_C4C3R( src, 0, data, 0, cvSize(m_width,1) );
|
||
|
|
}
|
||
|
|
result = true;
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
assert(0);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
catch(...)
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
//////////////////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
BmpEncoder::BmpEncoder()
|
||
|
|
{
|
||
|
|
m_description = "Windows bitmap (*.bmp;*.dib)";
|
||
|
|
m_buf_supported = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
BmpEncoder::~BmpEncoder()
|
||
|
|
{
|
||
|
|
}
|
||
|
|
|
||
|
|
ImageEncoder BmpEncoder::newEncoder() const
|
||
|
|
{
|
||
|
|
return new BmpEncoder;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool BmpEncoder::write( const Mat& img, const vector<int>& )
|
||
|
|
{
|
||
|
|
int width = img.cols, height = img.rows, channels = img.channels();
|
||
|
|
int fileStep = (width*channels + 3) & -4;
|
||
|
|
uchar zeropad[] = "\0\0\0\0";
|
||
|
|
WLByteStream strm;
|
||
|
|
|
||
|
|
if( m_buf )
|
||
|
|
{
|
||
|
|
if( !strm.open( *m_buf ) )
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
else if( !strm.open( m_filename ))
|
||
|
|
return false;
|
||
|
|
|
||
|
|
int bitmapHeaderSize = 40;
|
||
|
|
int paletteSize = channels > 1 ? 0 : 1024;
|
||
|
|
int headerSize = 14 /* fileheader */ + bitmapHeaderSize + paletteSize;
|
||
|
|
int fileSize = fileStep*height + headerSize;
|
||
|
|
PaletteEntry palette[256];
|
||
|
|
|
||
|
|
if( m_buf )
|
||
|
|
m_buf->reserve( alignSize(fileSize + 16, 256) );
|
||
|
|
|
||
|
|
// write signature 'BM'
|
||
|
|
strm.putBytes( fmtSignBmp, (int)strlen(fmtSignBmp) );
|
||
|
|
|
||
|
|
// write file header
|
||
|
|
strm.putDWord( fileSize ); // file size
|
||
|
|
strm.putDWord( 0 );
|
||
|
|
strm.putDWord( headerSize );
|
||
|
|
|
||
|
|
// write bitmap header
|
||
|
|
strm.putDWord( bitmapHeaderSize );
|
||
|
|
strm.putDWord( width );
|
||
|
|
strm.putDWord( height );
|
||
|
|
strm.putWord( 1 );
|
||
|
|
strm.putWord( channels << 3 );
|
||
|
|
strm.putDWord( BMP_RGB );
|
||
|
|
strm.putDWord( 0 );
|
||
|
|
strm.putDWord( 0 );
|
||
|
|
strm.putDWord( 0 );
|
||
|
|
strm.putDWord( 0 );
|
||
|
|
strm.putDWord( 0 );
|
||
|
|
|
||
|
|
if( channels == 1 )
|
||
|
|
{
|
||
|
|
FillGrayPalette( palette, 8 );
|
||
|
|
strm.putBytes( palette, sizeof(palette));
|
||
|
|
}
|
||
|
|
|
||
|
|
width *= channels;
|
||
|
|
for( int y = height - 1; y >= 0; y-- )
|
||
|
|
{
|
||
|
|
strm.putBytes( img.data + img.step*y, width );
|
||
|
|
if( fileStep > width )
|
||
|
|
strm.putBytes( zeropad, fileStep - width );
|
||
|
|
}
|
||
|
|
|
||
|
|
strm.close();
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
}
|
||
|
|
|