| /*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. |
| // |
| // |
| // Intel License Agreement |
| // For Open Source Computer Vision Library |
| // |
| // Copyright (C) 2000, Intel Corporation, 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 Intel Corporation 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" |
| |
| static const char* fmtSignBmp = "BM"; |
| |
| GrFmtBmp::GrFmtBmp() |
| { |
| m_sign_len = 2; |
| m_signature = fmtSignBmp; |
| m_description = "Windows bitmap (*.bmp;*.dib)"; |
| } |
| |
| |
| GrFmtBmp::~GrFmtBmp() |
| { |
| } |
| |
| |
| GrFmtReader* GrFmtBmp::NewReader( const char* filename ) |
| { |
| return new GrFmtBmpReader( filename ); |
| } |
| |
| |
| GrFmtWriter* GrFmtBmp::NewWriter( const char* filename ) |
| { |
| return new GrFmtBmpWriter( filename ); |
| } |
| |
| |
| /************************ BMP reader *****************************/ |
| |
| GrFmtBmpReader::GrFmtBmpReader( const char* filename ) : GrFmtReader( filename ) |
| { |
| m_offset = -1; |
| } |
| |
| |
| GrFmtBmpReader::~GrFmtBmpReader() |
| { |
| } |
| |
| |
| void GrFmtBmpReader::Close() |
| { |
| m_strm.Close(); |
| GrFmtReader::Close(); |
| } |
| |
| |
| bool GrFmtBmpReader::ReadHeader() |
| { |
| bool result = false; |
| |
| assert( strlen(m_filename) != 0 ); |
| if( !m_strm.Open( m_filename )) return false; |
| |
| if( setjmp( m_strm.JmpBuf()) == 0 ) |
| { |
| 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))) |
| { |
| m_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 ); |
| m_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; |
| } |
| } |
| } |
| |
| if( !result ) |
| { |
| m_offset = -1; |
| m_width = m_height = -1; |
| m_strm.Close(); |
| } |
| return result; |
| } |
| |
| |
| bool GrFmtBmpReader::ReadData( uchar* data, int step, int color ) |
| { |
| const int buffer_size = 1 << 12; |
| uchar buffer[buffer_size]; |
| uchar bgr_buffer[buffer_size]; |
| uchar gray_palette[256]; |
| bool result = false; |
| uchar* src = buffer; |
| uchar* bgr = bgr_buffer; |
| int src_pitch = ((m_width*(m_bpp != 15 ? m_bpp : 16) + 7)/8 + 3) & -4; |
| int nch = color ? 3 : 1; |
| int width3 = m_width*nch; |
| int y; |
| |
| if( m_offset < 0 || !m_strm.IsOpened()) |
| return false; |
| |
| data += (m_height - 1)*step; |
| step = -step; |
| |
| if( (m_bpp != 24 || !color) && src_pitch+32 > buffer_size ) |
| src = new uchar[src_pitch+32]; |
| |
| if( !color ) |
| { |
| if( m_bpp <= 8 ) |
| { |
| CvtPaletteToGray( m_palette, gray_palette, 1 << m_bpp ); |
| } |
| if( m_width*3 + 32 > buffer_size ) bgr = new uchar[m_width*3 + 32]; |
| } |
| |
| if( setjmp( m_strm.JmpBuf()) == 0 ) |
| { |
| 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); |
| } |
| } |
| |
| if( src != buffer ) delete[] src; |
| if( bgr != bgr_buffer ) delete[] bgr; |
| return result; |
| } |
| |
| |
| ////////////////////////////////////////////////////////////////////////////////////////// |
| |
| GrFmtBmpWriter::GrFmtBmpWriter( const char* filename ) : GrFmtWriter( filename ) |
| { |
| } |
| |
| |
| GrFmtBmpWriter::~GrFmtBmpWriter() |
| { |
| } |
| |
| |
| bool GrFmtBmpWriter::WriteImage( const uchar* data, int step, |
| int width, int height, int /*depth*/, int channels ) |
| { |
| bool result = false; |
| int fileStep = (width*channels + 3) & -4; |
| uchar zeropad[] = "\0\0\0\0"; |
| |
| assert( data && width > 0 && height > 0 && step >= fileStep ); |
| |
| if( m_strm.Open( m_filename ) ) |
| { |
| int bitmapHeaderSize = 40; |
| int paletteSize = channels > 1 ? 0 : 1024; |
| int headerSize = 14 /* fileheader */ + bitmapHeaderSize + paletteSize; |
| PaletteEntry palette[256]; |
| |
| // write signature 'BM' |
| m_strm.PutBytes( fmtSignBmp, (int)strlen(fmtSignBmp) ); |
| |
| // write file header |
| m_strm.PutDWord( fileStep*height + headerSize ); // file size |
| m_strm.PutDWord( 0 ); |
| m_strm.PutDWord( headerSize ); |
| |
| // write bitmap header |
| m_strm.PutDWord( bitmapHeaderSize ); |
| m_strm.PutDWord( width ); |
| m_strm.PutDWord( height ); |
| m_strm.PutWord( 1 ); |
| m_strm.PutWord( channels << 3 ); |
| m_strm.PutDWord( BMP_RGB ); |
| m_strm.PutDWord( 0 ); |
| m_strm.PutDWord( 0 ); |
| m_strm.PutDWord( 0 ); |
| m_strm.PutDWord( 0 ); |
| m_strm.PutDWord( 0 ); |
| |
| if( channels == 1 ) |
| { |
| FillGrayPalette( palette, 8 ); |
| m_strm.PutBytes( palette, sizeof(palette)); |
| } |
| |
| width *= channels; |
| data += step*(height - 1); |
| for( ; height--; data -= step ) |
| { |
| m_strm.PutBytes( data, width ); |
| if( fileStep > width ) |
| m_strm.PutBytes( zeropad, fileStep - width ); |
| } |
| |
| m_strm.Close(); |
| result = true; |
| } |
| return result; |
| } |
| |
| |
