bool SunRasterDecoder::readData( Mat& img )
{
int color = img.channels() > 1;
uchar* data = img.data;
int step = img.step;
uchar gray_palette[256];
bool result = false;
int src_pitch = ((m_width*m_bpp + 7)/8 + 1) & -2;
int nch = color ? 3 : 1;
int width3 = m_width*nch;
int y;
if( m_offset < 0 || !m_strm.isOpened())
return false;
AutoBuffer<uchar> _src(src_pitch + 32);
uchar* src = _src;
AutoBuffer<uchar> _bgr(m_width*3 + 32);
uchar* bgr = _bgr;
if( !color && m_maptype == RMT_EQUAL_RGB )
CvtPaletteToGray( m_palette, gray_palette, 1 << m_bpp );
try
{
m_strm.setPos( m_offset );
switch( m_bpp )
{
/************************* 1 BPP ************************/
case 1:
if( m_type != RAS_BYTE_ENCODED )
{
for( y = 0; y < m_height; y++, data += step )
{
m_strm.getBytes( src, src_pitch );
if( color )
FillColorRow1( data, src, m_width, m_palette );
else
FillGrayRow1( data, src, m_width, gray_palette );
}
result = true;
}
else
{
uchar* line_end = src + (m_width*m_bpp + 7)/8;
uchar* tsrc = src;
y = 0;
for(;;)
{
int max_count = (int)(line_end - tsrc);
int code = 0, len = 0, len1 = 0;
do
{
code = m_strm.getByte();
if( code == 0x80 )
{
len = m_strm.getByte();
if( len != 0 ) break;
}
tsrc[len1] = (uchar)code;
}
while( ++len1 < max_count );
tsrc += len1;
if( len > 0 ) // encoded mode
{
++len;
code = m_strm.getByte();
if( len > line_end - tsrc )
{
assert(0);
goto bad_decoding_1bpp;
}
memset( tsrc, code, len );
tsrc += len;
}
if( tsrc >= line_end )
{
tsrc = src;
if( color )
FillColorRow1( data, src, m_width, m_palette );
else
FillGrayRow1( data, src, m_width, gray_palette );
data += step;
if( ++y >= m_height ) break;
}
}
result = true;
bad_decoding_1bpp:
;
}
break;
/************************* 8 BPP ************************/
case 8:
if( m_type != RAS_BYTE_ENCODED )
{
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 // RLE-encoded
{
uchar* line_end = data + width3;
y = 0;
for(;;)
{
int max_count = (int)(line_end - data);
int code = 0, len = 0, len1;
uchar* tsrc = src;
do
{
code = m_strm.getByte();
if( code == 0x80 )
{
len = m_strm.getByte();
if( len != 0 ) break;
}
*tsrc++ = (uchar)code;
}
while( (max_count -= nch) > 0 );
len1 = (int)(tsrc - src);
if( len1 > 0 )
{
if( color )
FillColorRow8( data, src, len1, m_palette );
else
FillGrayRow8( data, src, len1, gray_palette );
data += len1*nch;
}
if( len > 0 ) // encoded mode
{
len = (len + 1)*nch;
code = m_strm.getByte();
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] );
if( y >= m_height )
break;
}
if( data == line_end )
{
if( m_strm.getByte() != 0 )
goto bad_decoding_end;
line_end += step;
data = line_end - width3;
if( ++y >= m_height ) break;
}
}
result = true;
bad_decoding_end:
;
}
break;
/************************* 24 BPP ************************/
case 24:
for( y = 0; y < m_height; y++, data += step )
{
m_strm.getBytes( color ? data : bgr, src_pitch );
if( color )
{
if( m_type == RAS_FORMAT_RGB )
icvCvt_RGB2BGR_8u_C3R( data, 0, data, 0, cvSize(m_width,1) );
}
else
{
icvCvt_BGR2Gray_8u_C3C1R( bgr, 0, data, 0, cvSize(m_width,1),
m_type == RAS_FORMAT_RGB ? 2 : 0 );
}
}
result = true;
break;
/************************* 32 BPP ************************/
case 32:
for( y = 0; y < m_height; y++, data += step )
{
/* hack: a0 b0 g0 r0 a1 b1 g1 r1 ... are written to src + 3,
so when we look at src + 4, we see b0 g0 r0 x b1 g1 g1 x ... */
m_strm.getBytes( src + 3, src_pitch );
if( color )
icvCvt_BGRA2BGR_8u_C4C3R( src + 4, 0, data, 0, cvSize(m_width,1),
m_type == RAS_FORMAT_RGB ? 2 : 0 );
else
icvCvt_BGRA2Gray_8u_C4C1R( src + 4, 0, data, 0, cvSize(m_width,1),
m_type == RAS_FORMAT_RGB ? 2 : 0 );
}
result = true;
break;
default:
assert(0);
}
}
catch( ... )
{
}
return result;
}
bool TiffDecoder::readData( Mat& img )
{
bool result = false;
bool color = img.channels() > 1;
uchar* data = img.data;
int step = (int)img.step;
if( img.depth() != CV_8U && img.depth() != CV_16U && img.depth() != CV_32F && img.depth() != CV_64F )
return false;
if( m_tif && m_width && m_height )
{
TIFF* tif = (TIFF*)m_tif;
int tile_width0 = m_width, tile_height0 = 0;
int x, y, i;
int is_tiled = TIFFIsTiled(tif);
int photometric;
TIFFGetField( tif, TIFFTAG_PHOTOMETRIC, &photometric );
int bpp = 8, ncn = photometric > 1 ? 3 : 1;
TIFFGetField( tif, TIFFTAG_BITSPERSAMPLE, &bpp );
TIFFGetField( tif, TIFFTAG_SAMPLESPERPIXEL, &ncn );
const int bitsPerByte = 8;
int dst_bpp = (int)(img.elemSize1() * bitsPerByte);
if(dst_bpp == 8)
{
char errmsg[1024];
if(!TIFFRGBAImageOK( tif, errmsg ))
{
close();
return false;
}
}
if( (!is_tiled) ||
(is_tiled &&
TIFFGetField( tif, TIFFTAG_TILEWIDTH, &tile_width0 ) &&
TIFFGetField( tif, TIFFTAG_TILELENGTH, &tile_height0 )))
{
if(!is_tiled)
TIFFGetField( tif, TIFFTAG_ROWSPERSTRIP, &tile_height0 );
if( tile_width0 <= 0 )
tile_width0 = m_width;
if( tile_height0 <= 0 )
tile_height0 = m_height;
AutoBuffer<uchar> _buffer(tile_height0*tile_width0*8);
uchar* buffer = _buffer;
ushort* buffer16 = (ushort*)buffer;
float* buffer32 = (float*)buffer;
double* buffer64 = (double*)buffer;
int tileidx = 0;
for( y = 0; y < m_height; y += tile_height0, data += step*tile_height0 )
{
int tile_height = tile_height0;
if( y + tile_height > m_height )
tile_height = m_height - y;
for( x = 0; x < m_width; x += tile_width0, tileidx++ )
{
int tile_width = tile_width0, ok;
if( x + tile_width > m_width )
tile_width = m_width - x;
switch(dst_bpp)
{
case 8:
{
if( !is_tiled )
ok = TIFFReadRGBAStrip( tif, y, (uint32*)buffer );
else
ok = TIFFReadRGBATile( tif, x, y, (uint32*)buffer );
if( !ok )
{
close();
return false;
}
for( i = 0; i < tile_height; i++ )
if( color )
icvCvt_BGRA2BGR_8u_C4C3R( buffer + i*tile_width*4, 0,
data + x*3 + step*(tile_height - i - 1), 0,
cvSize(tile_width,1), 2 );
else
icvCvt_BGRA2Gray_8u_C4C1R( buffer + i*tile_width*4, 0,
data + x + step*(tile_height - i - 1), 0,
cvSize(tile_width,1), 2 );
break;
}
case 16:
{
if( !is_tiled )
ok = (int)TIFFReadEncodedStrip( tif, tileidx, (uint32*)buffer, (tsize_t)-1 ) >= 0;
else
ok = (int)TIFFReadEncodedTile( tif, tileidx, (uint32*)buffer, (tsize_t)-1 ) >= 0;
if( !ok )
{
close();
return false;
}
for( i = 0; i < tile_height; i++ )
{
if( color )
{
if( ncn == 1 )
{
icvCvt_Gray2BGR_16u_C1C3R(buffer16 + i*tile_width*ncn, 0,
(ushort*)(data + step*i) + x*3, 0,
cvSize(tile_width,1) );
}
else if( ncn == 3 )
{
icvCvt_RGB2BGR_16u_C3R(buffer16 + i*tile_width*ncn, 0,
(ushort*)(data + step*i) + x*3, 0,
cvSize(tile_width,1) );
}
else
{
icvCvt_BGRA2BGR_16u_C4C3R(buffer16 + i*tile_width*ncn, 0,
(ushort*)(data + step*i) + x*3, 0,
cvSize(tile_width,1), 2 );
}
}
else
{
if( ncn == 1 )
{
memcpy((ushort*)(data + step*i)+x,
buffer16 + i*tile_width*ncn,
tile_width*sizeof(buffer16[0]));
}
else
{
icvCvt_BGRA2Gray_16u_CnC1R(buffer16 + i*tile_width*ncn, 0,
(ushort*)(data + step*i) + x, 0,
cvSize(tile_width,1), ncn, 2 );
}
}
}
break;
}
case 32:
case 64:
{
if( !is_tiled )
ok = (int)TIFFReadEncodedStrip( tif, tileidx, buffer, (tsize_t)-1 ) >= 0;
else
ok = (int)TIFFReadEncodedTile( tif, tileidx, buffer, (tsize_t)-1 ) >= 0;
if( !ok || ncn != 1 )
{
close();
return false;
}
for( i = 0; i < tile_height; i++ )
{
if(dst_bpp == 32)
{
memcpy((float*)(data + step*i)+x,
buffer32 + i*tile_width*ncn,
tile_width*sizeof(buffer32[0]));
}
else
{
memcpy((double*)(data + step*i)+x,
buffer64 + i*tile_width*ncn,
tile_width*sizeof(buffer64[0]));
}
}
break;
}
default:
{
close();
return false;
}
}
}
}
result = true;
}
}
close();
return result;
}
bool TiffDecoder::readData( Mat& img )
{
bool result = false;
bool color = img.channels() > 1;
uchar* data = img.data;
int step = img.step;
if( m_tif && m_width && m_height )
{
TIFF* tif = (TIFF*)m_tif;
int tile_width0 = m_width, tile_height0 = 0;
int x, y, i;
int is_tiled = TIFFIsTiled(tif);
if( (!is_tiled &&
TIFFGetField( tif, TIFFTAG_ROWSPERSTRIP, &tile_height0 )) ||
(is_tiled &&
TIFFGetField( tif, TIFFTAG_TILEWIDTH, &tile_width0 ) &&
TIFFGetField( tif, TIFFTAG_TILELENGTH, &tile_height0 )))
{
if( tile_width0 <= 0 )
tile_width0 = m_width;
if( tile_height0 <= 0 )
tile_height0 = m_height;
AutoBuffer<uchar> _buffer(tile_height0*tile_width0*4);
uchar* buffer = _buffer;
for( y = 0; y < m_height; y += tile_height0, data += step*tile_height0 )
{
int tile_height = tile_height0;
if( y + tile_height > m_height )
tile_height = m_height - y;
for( x = 0; x < m_width; x += tile_width0 )
{
int tile_width = tile_width0, ok;
if( x + tile_width > m_width )
tile_width = m_width - x;
if( !is_tiled )
ok = TIFFReadRGBAStrip( tif, y, (uint32*)buffer );
else
ok = TIFFReadRGBATile( tif, x, y, (uint32*)buffer );
if( !ok )
{
close();
return false;
}
for( i = 0; i < tile_height; i++ )
if( color )
icvCvt_BGRA2BGR_8u_C4C3R( buffer + i*tile_width*4, 0,
data + x*3 + step*(tile_height - i - 1), 0,
cvSize(tile_width,1), 2 );
else
icvCvt_BGRA2Gray_8u_C4C1R( buffer + i*tile_width*4, 0,
data + x + step*(tile_height - i - 1), 0,
cvSize(tile_width,1), 2 );
}
}
result = true;
}
}
close();
return result;
}
