X-Git-Url: https://vcs.maemo.org/git/?a=blobdiff_plain;f=src%2Fhighgui%2Fgrfmt_bmp.cpp;fp=src%2Fhighgui%2Fgrfmt_bmp.cpp;h=9d0dbc1bd93e492389683550957dce692188a393;hb=e4c14cdbdf2fe805e79cd96ded236f57e7b89060;hp=0000000000000000000000000000000000000000;hpb=454138ff8a20f6edb9b65a910101403d8b520643;p=opencv diff --git a/src/highgui/grfmt_bmp.cpp b/src/highgui/grfmt_bmp.cpp new file mode 100644 index 0000000..9d0dbc1 --- /dev/null +++ b/src/highgui/grfmt_bmp.cpp @@ -0,0 +1,557 @@ +/*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<> 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 _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 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; +} + +} +