static void ReadJP2KImage( GenericImage<P>& img, jas_stream_t* jp2Stream, jas_image_t* jp2Image )
{
int width = jas_image_cmptwidth( jp2Image, 0 );
int height = jas_image_cmptheight( jp2Image, 0 );
int numberOfChannels = jas_image_numcmpts( jp2Image );
jas_matrix_t* pixels = nullptr;
try
{
pixels = jas_matrix_create( 1, width );
if ( pixels == nullptr )
throw Error( "Memory allocation error reading JPEG2000 image" );
// Allocate pixel data
img.AllocateData( width, height, numberOfChannels,
(jas_clrspc_fam( jas_image_clrspc( jp2Image ) ) == JAS_CLRSPC_FAM_GRAY) ?
ColorSpace::Gray : ColorSpace::RGB );
for ( int c = 0; c < numberOfChannels; ++c )
{
int n = jas_image_cmptprec( jp2Image, c );
bool s = jas_image_cmptsgnd( jp2Image, c ) != 0;
for ( int y = 0; y < height; ++y )
{
jas_image_readcmpt( jp2Image, c, 0, y, width, 1, pixels );
typename P::sample* f = img.ScanLine( y, c );
if ( n == 8 )
{
if ( s )
for ( int x = 0; x < width; ++x )
*f++ = P::ToSample( int8( jas_matrix_get( pixels, 0, x ) ) );
else
for ( int x = 0; x < width; ++x )
*f++ = P::ToSample( uint8( jas_matrix_get( pixels, 0, x ) ) );
}
else
{
if ( s )
for ( int x = 0; x < width; ++x )
*f++ = P::ToSample( int16( jas_matrix_get( pixels, 0, x ) ) );
else
for ( int x = 0; x < width; ++x )
*f++ = P::ToSample( uint16( jas_matrix_get( pixels, 0, x ) ) );
}
}
}
jas_matrix_destroy( pixels ), pixels = nullptr;
}
catch ( ... )
{
if ( pixels != nullptr )
jas_matrix_destroy( pixels );
throw;
}
}
static void LoadAndTransformImage( GenericImage<P>& transform, const GenericImage<P1>& image, bool parallel, int maxProcessors )
{
Rect r = image.SelectedRectangle();
if ( !r.IsRect() )
return;
int w = FFTC::OptimizedLength( r.Width() );
int h = FFTC::OptimizedLength( r.Height() );
int dw2 = (w - r.Width()) >> 1;
int dh2 = (h - r.Height()) >> 1;
transform.AllocateData( w, h, image.NumberOfSelectedChannels(),
(image.NumberOfSelectedChannels() < 3 || image.FirstSelectedChannel() != 0) ?
ColorSpace::Gray : image.ColorSpace() );
transform.Zero().Move( image, Point( dw2, dh2 ) );
ApplyInPlaceFourierTransform( transform, FFTDirection::Forward, parallel, maxProcessors );
}
static void ApplyInverseRealFourierTransform_2( GenericImage<P>& image, const GenericImage<P1>& dft, bool parallel, int maxProcessors )
{
if ( dft.IsEmpty() )
{
image.FreeData();
return;
}
int w = dft.Width();
int h = dft.Height();
image.AllocateData( 2*(w - 1), h, dft.NumberOfChannels(), dft.ColorSpace() );
bool statusInitialized = false;
if ( image.Status().IsInitializationEnabled() )
{
image.Status().Initialize( "Inverse FFT", image.NumberOfChannels()*size_type( w + h ) );
image.Status().DisableInitialization();
statusInitialized = true;
}
try
{
FFTR F( h, w, image.Status() );
F.EnableParallelProcessing( parallel, maxProcessors );
for ( int c = 0; c < image.NumberOfChannels(); ++c )
F( image[c], dft[c] );
if ( statusInitialized )
image.Status().EnableInitialization();
}
catch ( ... )
{
if ( statusInitialized )
image.Status().EnableInitialization();
throw;
}
}
static void ReadJPEGImage( GenericImage<P>& img, JPEGReader& reader, JPEGFileData* fileData )
{
if ( !reader.IsOpen() )
throw JPEG::InvalidReadOperation( String() );
JSAMPLE* buffer = nullptr; // one-row sample array for scanline reading
typename P::sample** v = nullptr; // pointers to destination scan lines
try
{
// Set parameters for decompression.
// Most parameters have already been established by Open().
// We just ensure that we'll get either a grayscale or a RGB color image.
if ( jpeg_decompressor->out_color_space != JCS_GRAYSCALE )
jpeg_decompressor->out_color_space = JCS_RGB;
// Start decompressor.
::jpeg_start_decompress( jpeg_decompressor );
// Allocate pixel data.
img.AllocateData( jpeg_decompressor->output_width,
jpeg_decompressor->output_height,
jpeg_decompressor->output_components,
(jpeg_decompressor->out_color_space == JCS_GRAYSCALE) ?
ColorSpace::Gray : ColorSpace::RGB );
// Initialize status callback.
if ( img.Status().IsInitializationEnabled() )
img.Status().Initialize( String().Format(
"Decompressing JPEG: %d channel(s), %dx%d pixels",
img.NumberOfChannels(), img.Width(), img.Height() ), img.NumberOfSamples() );
//
// Read pixels row by row.
//
// JSAMPLEs per row in output buffer.
int row_stride = img.Width() * img.NumberOfChannels();
// Make a one-row-high sample array.
buffer = new JSAMPLE[ row_stride ];
// JPEG organization is chunky; PCL images are planar.
v = new typename P::sample*[ img.NumberOfChannels() ];
while ( jpeg_decompressor->output_scanline < jpeg_decompressor->output_height )
{
::jpeg_read_scanlines( jpeg_decompressor, &buffer, 1 );
const JSAMPLE* b = buffer;
for ( int c = 0; c < img.NumberOfChannels(); ++c )
v[c] = img.ScanLine( jpeg_decompressor->output_scanline-1, c );
for ( int i = 0; i < img.Width(); ++i )
for ( int c = 0; c < img.NumberOfChannels(); ++c, ++b )
*v[c]++ = P::IsFloatSample() ? typename P::sample( *b ) : P::ToSample( *b );
img.Status() += img.Width()*img.NumberOfChannels();
}
// Clean up temporary structures.
delete [] v, v = nullptr;
delete [] buffer, buffer = nullptr;
// Finish decompression.
::jpeg_finish_decompress( jpeg_decompressor );
// ### TODO --> At this point we might check whether any corrupt-data
// warnings occurred (test whether jerr.pub.num_warnings is nonzero).
}
catch ( ... )
{
reader.Close();
if ( buffer != nullptr )
delete [] buffer;
if ( v != nullptr )
delete [] v;
img.FreeData();
throw;
}
}
