--- /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 "utils.h"
+#include "grfmt_pxm.h"
+
+namespace cv
+{
+
+///////////////////////// P?M reader //////////////////////////////
+
+static int ReadNumber( RLByteStream& strm, int maxdigits )
+{
+ int code;
+ int val = 0;
+ int digits = 0;
+
+ code = strm.getByte();
+
+ if( !isdigit(code))
+ {
+ do
+ {
+ if( code == '#' )
+ {
+ do
+ {
+ code = strm.getByte();
+ }
+ while( code != '\n' && code != '\r' );
+ }
+
+ code = strm.getByte();
+
+ while( isspace(code))
+ code = strm.getByte();
+ }
+ while( !isdigit( code ));
+ }
+
+ do
+ {
+ val = val*10 + code - '0';
+ if( ++digits >= maxdigits ) break;
+ code = strm.getByte();
+ }
+ while( isdigit(code));
+
+ return val;
+}
+
+
+PxMDecoder::PxMDecoder()
+{
+ m_offset = -1;
+ m_buf_supported = true;
+}
+
+
+PxMDecoder::~PxMDecoder()
+{
+ close();
+}
+
+size_t PxMDecoder::signatureLength() const
+{
+ return 3;
+}
+
+bool PxMDecoder::checkSignature( const string& signature ) const
+{
+ return signature.size() >= 3 && signature[0] == 'P' &&
+ '1' <= signature[1] && signature[1] <= '6' &&
+ isspace(signature[2]);
+}
+
+ImageDecoder PxMDecoder::newDecoder() const
+{
+ return new PxMDecoder;
+}
+
+void PxMDecoder::close()
+{
+ m_strm.close();
+}
+
+
+bool PxMDecoder::readHeader()
+{
+ bool result = false;
+
+ if( !m_buf.empty() )
+ {
+ if( !m_strm.open(m_buf) )
+ return false;
+ }
+ else if( !m_strm.open( m_filename ))
+ return false;
+
+ try
+ {
+ int code = m_strm.getByte();
+ if( code != 'P' )
+ throw RBS_BAD_HEADER;
+
+ code = m_strm.getByte();
+ switch( code )
+ {
+ case '1': case '4': m_bpp = 1; break;
+ case '2': case '5': m_bpp = 8; break;
+ case '3': case '6': m_bpp = 24; break;
+ default: throw RBS_BAD_HEADER;
+ }
+
+ m_binary = code >= '4';
+ m_type = m_bpp > 8 ? CV_8UC3 : CV_8UC1;
+
+ m_width = ReadNumber( m_strm, INT_MAX );
+ m_height = ReadNumber( m_strm, INT_MAX );
+
+ m_maxval = m_bpp == 1 ? 1 : ReadNumber( m_strm, INT_MAX );
+ if( m_maxval > 65535 )
+ throw RBS_BAD_HEADER;
+
+ //if( m_maxval > 255 ) m_binary = false; nonsense
+ if( m_maxval > 255 )
+ m_type = CV_MAKETYPE(CV_16U, CV_MAT_CN(m_type));
+
+ if( m_width > 0 && m_height > 0 && m_maxval > 0 && m_maxval < (1 << 16))
+ {
+ m_offset = m_strm.getPos();
+ result = true;
+ }
+ }
+ catch(...)
+ {
+ }
+
+ if( !result )
+ {
+ m_offset = -1;
+ m_width = m_height = -1;
+ m_strm.close();
+ }
+ return result;
+}
+
+
+bool PxMDecoder::readData( Mat& img )
+{
+ int color = img.channels() > 1;
+ uchar* data = img.data;
+ int step = img.step;
+ PaletteEntry palette[256];
+ bool result = false;
+ int bit_depth = CV_ELEM_SIZE1(m_type)*8;
+ int src_pitch = (m_width*m_bpp*bit_depth/8 + 7)/8;
+ int nch = CV_MAT_CN(m_type);
+ int width3 = m_width*nch;
+ int i, x, y;
+
+ if( m_offset < 0 || !m_strm.isOpened())
+ return false;
+
+ AutoBuffer<uchar,1024> _src(src_pitch + 32);
+ uchar* src = _src;
+ AutoBuffer<uchar,1024> _gray_palette;
+ uchar* gray_palette = _gray_palette;
+
+ // create LUT for converting colors
+ if( bit_depth == 8 )
+ {
+ _gray_palette.allocate(m_maxval + 1);
+ gray_palette = _gray_palette;
+
+ for( i = 0; i <= m_maxval; i++ )
+ gray_palette[i] = (uchar)((i*255/m_maxval)^(m_bpp == 1 ? 255 : 0));
+
+ FillGrayPalette( palette, m_bpp==1 ? 1 : 8 , m_bpp == 1 );
+ }
+
+ try
+ {
+ m_strm.setPos( m_offset );
+
+ switch( m_bpp )
+ {
+ ////////////////////////// 1 BPP /////////////////////////
+ case 1:
+ if( !m_binary )
+ {
+ for( y = 0; y < m_height; y++, data += step )
+ {
+ for( x = 0; x < m_width; x++ )
+ src[x] = ReadNumber( m_strm, 1 ) != 0;
+
+ if( color )
+ FillColorRow8( data, src, m_width, palette );
+ else
+ FillGrayRow8( data, src, m_width, gray_palette );
+ }
+ }
+ else
+ {
+ for( y = 0; y < m_height; y++, data += step )
+ {
+ m_strm.getBytes( src, src_pitch );
+
+ if( color )
+ FillColorRow1( data, src, m_width, palette );
+ else
+ FillGrayRow1( data, src, m_width, gray_palette );
+ }
+ }
+ result = true;
+ break;
+
+ ////////////////////////// 8 BPP /////////////////////////
+ case 8:
+ case 24:
+ for( y = 0; y < m_height; y++, data += step )
+ {
+ if( !m_binary )
+ {
+ for( x = 0; x < width3; x++ )
+ {
+ int code = ReadNumber( m_strm, INT_MAX );
+ if( (unsigned)code > (unsigned)m_maxval ) code = m_maxval;
+ if( bit_depth == 8 )
+ src[x] = gray_palette[code];
+ else
+ ((ushort *)src)[x] = (ushort)code;
+ }
+ }
+ else
+ {
+ m_strm.getBytes( src, src_pitch );
+ if( bit_depth == 16 && !isBigEndian() )
+ {
+ for( x = 0; x < width3; x++ )
+ {
+ uchar v = src[x * 2];
+ src[x * 2] = src[x * 2 + 1];
+ src[x * 2 + 1] = v;
+ }
+ }
+ }
+
+ if( img.depth() == CV_8U && bit_depth == 16 )
+ {
+ for( x = 0; x < width3; x++ )
+ {
+ int v = ((ushort *)src)[x];
+ src[x] = (uchar)(v >> 8);
+ }
+ }
+
+ if( m_bpp == 8 ) // image has one channel
+ {
+ if( color )
+ {
+ if( img.depth() == CV_8U ) {
+ uchar *d = data, *s = src, *end = src + m_width;
+ for( ; s < end; d += 3, s++)
+ d[0] = d[1] = d[2] = *s;
+ } else {
+ ushort *d = (ushort *)data, *s = (ushort *)src, *end = ((ushort *)src) + m_width;
+ for( ; s < end; s++, d += 3)
+ d[0] = d[1] = d[2] = *s;
+ }
+ }
+ else
+ memcpy( data, src, m_width*(bit_depth/8) );
+ }
+ else
+ {
+ if( color )
+ {
+ if( img.depth() == CV_8U )
+ icvCvt_RGB2BGR_8u_C3R( src, 0, data, 0, cvSize(m_width,1) );
+ else
+ icvCvt_RGB2BGR_16u_C3R( (ushort *)src, 0, (ushort *)data, 0, cvSize(m_width,1) );
+ }
+ else if( img.depth() == CV_8U )
+ icvCvt_BGR2Gray_8u_C3C1R( src, 0, data, 0, cvSize(m_width,1), 2 );
+ else
+ icvCvt_BGR2Gray_16u_C3C1R( (ushort *)src, 0, (ushort *)data, 0, cvSize(m_width,1), 2 );
+ }
+ }
+ result = true;
+ break;
+ default:
+ assert(0);
+ }
+ }
+ catch(...)
+ {
+ }
+
+ return result;
+}
+
+
+//////////////////////////////////////////////////////////////////////////////////////////
+
+PxMEncoder::PxMEncoder()
+{
+ m_description = "Portable image format (*.pbm;*.pgm;*.ppm;*.pxm;*.pnm)";
+ m_buf_supported = true;
+}
+
+
+PxMEncoder::~PxMEncoder()
+{
+}
+
+
+ImageEncoder PxMEncoder::newEncoder() const
+{
+ return new PxMEncoder;
+}
+
+
+bool PxMEncoder::isFormatSupported( int depth ) const
+{
+ return depth == CV_8U || depth == CV_16U;
+}
+
+
+bool PxMEncoder::write( const Mat& img, const vector<int>& params )
+{
+ bool isBinary = true;
+
+ int width = img.cols, height = img.rows;
+ int _channels = img.channels(), depth = img.elemSize1()*8;
+ int channels = _channels > 1 ? 3 : 1;
+ int fileStep = width*img.elemSize();
+ int x, y;
+
+ for( size_t i = 0; i < params.size(); i += 2 )
+ if( params[i] == CV_IMWRITE_PXM_BINARY )
+ isBinary = params[i+1] != 0;
+
+ WLByteStream strm;
+
+ if( m_buf )
+ {
+ if( !strm.open(*m_buf) )
+ return false;
+ int t = CV_MAKETYPE(img.depth(), channels);
+ m_buf->reserve( alignSize(256 + (isBinary ? fileStep*height :
+ ((t == CV_8UC1 ? 4 : t == CV_8UC3 ? 4*3+2 :
+ t == CV_16UC1 ? 6 : 6*3+2)*width+1)*height), 256));
+ }
+ else if( !strm.open(m_filename) )
+ return false;
+
+ int lineLength;
+ int bufferSize = 128; // buffer that should fit a header
+
+ if( isBinary )
+ lineLength = width * img.elemSize();
+ else
+ lineLength = (6 * channels + (channels > 1 ? 2 : 0)) * width + 32;
+
+ if( bufferSize < lineLength )
+ bufferSize = lineLength;
+
+ AutoBuffer<char> _buffer(bufferSize);
+ char* buffer = _buffer;
+
+ // write header;
+ sprintf( buffer, "P%c\n%d %d\n%d\n",
+ '2' + (channels > 1 ? 1 : 0) + (isBinary ? 3 : 0),
+ width, height, (1 << depth) - 1 );
+
+ strm.putBytes( buffer, (int)strlen(buffer) );
+
+ for( y = 0; y < height; y++ )
+ {
+ uchar* data = img.data + img.step*y;
+ if( isBinary )
+ {
+ if( _channels == 3 )
+ {
+ if( depth == 8 )
+ icvCvt_BGR2RGB_8u_C3R( (uchar*)data, 0,
+ (uchar*)buffer, 0, cvSize(width,1) );
+ else
+ icvCvt_BGR2RGB_16u_C3R( (ushort*)data, 0,
+ (ushort*)buffer, 0, cvSize(width,1) );
+ }
+
+ // swap endianness if necessary
+ if( depth == 16 && !isBigEndian() )
+ {
+ if( _channels == 1 )
+ memcpy( buffer, data, fileStep );
+ for( x = 0; x < width*channels*2; x += 2 )
+ {
+ uchar v = buffer[x];
+ buffer[x] = buffer[x + 1];
+ buffer[x + 1] = v;
+ }
+ }
+ strm.putBytes( (channels > 1 || depth > 8) ? buffer : (char*)data, fileStep );
+ }
+ else
+ {
+ char* ptr = buffer;
+
+ if( channels > 1 )
+ {
+ if( depth == 8 )
+ {
+ for( x = 0; x < width*channels; x += channels )
+ {
+ sprintf( ptr, "% 4d", data[x + 2] );
+ ptr += 4;
+ sprintf( ptr, "% 4d", data[x + 1] );
+ ptr += 4;
+ sprintf( ptr, "% 4d", data[x] );
+ ptr += 4;
+ *ptr++ = ' ';
+ *ptr++ = ' ';
+ }
+ }
+ else
+ {
+ for( x = 0; x < width*channels; x += channels )
+ {
+ sprintf( ptr, "% 6d", ((ushort *)data)[x + 2] );
+ ptr += 6;
+ sprintf( ptr, "% 6d", ((ushort *)data)[x + 1] );
+ ptr += 6;
+ sprintf( ptr, "% 6d", ((ushort *)data)[x] );
+ ptr += 6;
+ *ptr++ = ' ';
+ *ptr++ = ' ';
+ }
+ }
+ }
+ else
+ {
+ if( depth == 8 )
+ {
+ for( x = 0; x < width; x++ )
+ {
+ sprintf( ptr, "% 4d", data[x] );
+ ptr += 4;
+ }
+ }
+ else
+ {
+ for( x = 0; x < width; x++ )
+ {
+ sprintf( ptr, "% 6d", ((ushort *)data)[x] );
+ ptr += 6;
+ }
+ }
+ }
+
+ *ptr++ = '\n';
+
+ strm.putBytes( buffer, (int)(ptr - buffer) );
+ }
+ }
+
+ strm.close();
+ return true;
+}
+
+}
projects / opencv / blobdiff