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opencv/modules/highgui/src/grfmt_pxm.cpp
Andrey Kamaev 2a6fb2867e Remove all using directives for STL namespace and members 
Made all STL usages explicit to be able automatically find all usages of
particular class or function.
2013-02-25 15:04:17 +04:00

514 lines
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/*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 "precomp.hpp"
#include "utils.hpp"
#include "grfmt_pxm.hpp"
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 std::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 = (int)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> _src(src_pitch + 32);
uchar* src = _src;
AutoBuffer<uchar> _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_BGRA2Gray_16u_CnC1R( (ushort *)src, 0, (ushort *)data, 0, cvSize(m_width,1), 3, 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 std::vector<int>& params )
{
bool isBinary = true;
int width = img.cols, height = img.rows;
int _channels = img.channels(), depth = (int)img.elemSize1()*8;
int channels = _channels > 1 ? 3 : 1;
int fileStep = width*(int)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 * (int)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;
}
}
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