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