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320 lines
8.6 KiB
320 lines
8.6 KiB
// This library is distributed under the conditions of the GNU LGPL.
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#include "config.h"
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#ifdef HAVE_JASPER
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#include "jp2.h"
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#if !defined(__STDC_LIMIT_MACROS)
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#define __STDC_LIMIT_MACROS
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#endif
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_STDINT_H
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#include <stdint.h>
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#endif
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#include <ktempfile.h>
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#include <tqcolor.h>
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#include <tqcstring.h>
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#include <tqfile.h>
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#include <tqimage.h>
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// dirty, but avoids a warning because jasper.h includes jas_config.h.
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#undef PACKAGE
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#undef VERSION
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#include <jasper/jasper.h>
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// code taken in parts from JasPer's jiv.c
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#define DEFAULT_RATE 0.10
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#define MAXCMPTS 256
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typedef struct {
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jas_image_t* image;
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int cmptlut[MAXCMPTS];
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jas_image_t* altimage;
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} gs_t;
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jas_image_t*
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read_image( const TQImageIO* io )
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{
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jas_stream_t* in = 0;
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// for QIODevice's other than TQFile, a temp. file is used.
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KTempFile* tempf = 0;
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TQFile* qf = 0;
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if( ( qf = dynamic_cast<TQFile*>( io->ioDevice() ) ) ) {
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// great, it's a TQFile. Let's just take the filename.
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in = jas_stream_fopen( TQFile::encodeName( qf->name() ), "rb" );
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} else {
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// not a TQFile. Copy the whole data to a temp. file.
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tempf = new KTempFile();
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if( tempf->status() != 0 ) {
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delete tempf;
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return 0;
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} // if
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tempf->setAutoDelete( true );
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TQFile* out = tempf->file();
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// 4096 (=4k) is a common page size.
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TQByteArray b( 4096 );
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TQ_LONG size;
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// 0 or -1 is EOF / error
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while( ( size = io->ioDevice()->readBlock( b.data(), 4096 ) ) > 0 ) {
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// in case of a write error, still give the decoder a try
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if( ( out->writeBlock( b.data(), size ) ) == -1 ) break;
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} // while
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// flush everything out to disk
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out->flush();
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in = jas_stream_fopen( TQFile::encodeName( tempf->name() ), "rb" );
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} // else
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if( !in ) {
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delete tempf;
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return 0;
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} // if
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jas_image_t* image = jas_image_decode( in, -1, 0 );
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jas_stream_close( in );
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delete tempf;
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// image may be 0, but that's Ok
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return image;
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} // read_image
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static bool
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convert_colorspace( gs_t& gs )
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{
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jas_cmprof_t *outprof = jas_cmprof_createfromclrspc( JAS_CLRSPC_SRGB );
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if( !outprof ) return false;
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gs.altimage = jas_image_chclrspc( gs.image, outprof,
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JAS_CMXFORM_INTENT_PER );
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if( !gs.altimage ) return false;
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return true;
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} // convert_colorspace
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static bool
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render_view( gs_t& gs, TQImage& qti )
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{
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if((gs.cmptlut[0] = jas_image_getcmptbytype(gs.altimage,
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JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_R))) < 0 ||
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(gs.cmptlut[1] = jas_image_getcmptbytype(gs.altimage,
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JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_G))) < 0 ||
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(gs.cmptlut[2] = jas_image_getcmptbytype(gs.altimage,
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JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_B))) < 0) {
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return false;
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} // if
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const int* cmptlut = gs.cmptlut;
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int v[3];
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// check that all components have the same size.
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const int width = jas_image_cmptwidth( gs.altimage, cmptlut[0] );
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const int height = jas_image_cmptheight( gs.altimage, cmptlut[0] );
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for( int i = 1; i < 3; ++i ) {
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if (jas_image_cmptwidth( gs.altimage, cmptlut[i] ) != width ||
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jas_image_cmptheight( gs.altimage, cmptlut[i] ) != height)
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return false;
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} // for
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if( !qti.create( jas_image_width( gs.altimage ),
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jas_image_height( gs.altimage ), 32 ) )
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return false;
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uint32_t* data = (uint32_t*)qti.bits();
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for( int y = 0; y < height; ++y ) {
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for( int x = 0; x < width; ++x ) {
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for( int k = 0; k < 3; ++k ) {
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v[k] = jas_image_readcmptsample( gs.altimage, cmptlut[k], x, y );
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// if the precision of the component is too small, increase
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// it to use the complete value range.
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v[k] <<= 8 - jas_image_cmptprec( gs.altimage, cmptlut[k] );
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if( v[k] < 0 ) v[k] = 0;
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else if( v[k] > 255 ) v[k] = 255;
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} // for k
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*data++ = tqRgb( v[0], v[1], v[2] );
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} // for x
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} // for y
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return true;
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} // render_view
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KDE_EXPORT void
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kimgio_jp2_read( TQImageIO* io )
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{
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if( jas_init() ) return;
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gs_t gs;
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if( !(gs.image = read_image( io )) ) return;
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if( !convert_colorspace( gs ) ) return;
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TQImage image;
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render_view( gs, image );
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if( gs.image ) jas_image_destroy( gs.image );
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if( gs.altimage ) jas_image_destroy( gs.altimage );
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io->setImage( image );
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io->setStatus( 0 );
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} // kimgio_jp2_read
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static jas_image_t*
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create_image( const TQImage& qi )
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{
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// prepare the component parameters
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jas_image_cmptparm_t* cmptparms = new jas_image_cmptparm_t[ 3 ];
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for ( int i = 0; i < 3; ++i ) {
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// x and y offset
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cmptparms[i].tlx = 0;
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cmptparms[i].tly = 0;
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// the resulting image will be hstep*width x vstep*height !
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cmptparms[i].hstep = 1;
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cmptparms[i].vstep = 1;
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cmptparms[i].width = qi.width();
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cmptparms[i].height = qi.height();
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// we write everything as 24bit truecolor ATM
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cmptparms[i].prec = 8;
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cmptparms[i].sgnd = false;
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}
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jas_image_t* ji = jas_image_create( 3 /* number components */, cmptparms, JAS_CLRSPC_UNKNOWN );
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delete[] cmptparms;
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// returning 0 is ok
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return ji;
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} // create_image
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static bool
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write_components( jas_image_t* ji, const TQImage& qi )
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{
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const unsigned height = qi.height();
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const unsigned width = qi.width();
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jas_matrix_t* m = jas_matrix_create( height, width );
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if( !m ) return false;
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jas_image_setclrspc( ji, JAS_CLRSPC_SRGB );
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jas_image_setcmpttype( ji, 0, JAS_IMAGE_CT_RGB_R );
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for( uint y = 0; y < height; ++y )
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for( uint x = 0; x < width; ++x )
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jas_matrix_set( m, y, x, tqRed( qi.pixel( x, y ) ) );
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jas_image_writecmpt( ji, 0, 0, 0, width, height, m );
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jas_image_setcmpttype( ji, 1, JAS_IMAGE_CT_RGB_G );
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for( uint y = 0; y < height; ++y )
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for( uint x = 0; x < width; ++x )
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jas_matrix_set( m, y, x, tqGreen( qi.pixel( x, y ) ) );
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jas_image_writecmpt( ji, 1, 0, 0, width, height, m );
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jas_image_setcmpttype( ji, 2, JAS_IMAGE_CT_RGB_B );
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for( uint y = 0; y < height; ++y )
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for( uint x = 0; x < width; ++x )
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jas_matrix_set( m, y, x, tqBlue( qi.pixel( x, y ) ) );
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jas_image_writecmpt( ji, 2, 0, 0, width, height, m );
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jas_matrix_destroy( m );
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return true;
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} // write_components
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KDE_EXPORT void
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kimgio_jp2_write( TQImageIO* io )
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{
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if( jas_init() ) return;
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// open the stream. we write directly to the file if possible, to a
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// temporary file otherwise.
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jas_stream_t* stream = 0;
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TQFile* qf = 0;
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KTempFile* ktempf = 0;
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if( ( qf = dynamic_cast<TQFile*>( io->ioDevice() ) ) ) {
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// jas_stream_fdopen works here, but not when reading...
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stream = jas_stream_fdopen( dup( qf->handle() ), "w" );
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} else {
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ktempf = new KTempFile;
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ktempf->setAutoDelete( true );
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stream = jas_stream_fdopen( dup( ktempf->handle()), "w" );
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} // else
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// by here, a jas_stream_t is open
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if( !stream ) return;
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jas_image_t* ji = create_image( io->image() );
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if( !ji ) {
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delete ktempf;
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jas_stream_close( stream );
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return;
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} // if
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if( !write_components( ji, io->image() ) ) {
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delete ktempf;
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jas_stream_close( stream );
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jas_image_destroy( ji );
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return;
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} // if
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// optstr:
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// - rate=#B => the resulting file size is about # bytes
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// - rate=0.0 .. 1.0 => the resulting file size is about the factor times
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// the uncompressed size
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TQString rate;
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TQTextStream ts( &rate, IO_WriteOnly );
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ts << "rate="
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<< ( (io->quality() < 0) ? DEFAULT_RATE : io->quality() / 100.0F );
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int i = jp2_encode( ji, stream, rate.utf8().data() );
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jas_image_destroy( ji );
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jas_stream_close( stream );
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if( i != 0 ) { delete ktempf; return; }
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if( ktempf ) {
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// We've written to a tempfile. Copy the data to the final destination.
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TQFile* in = ktempf->file();
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TQByteArray b( 4096 );
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TQ_LONG size;
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// seek to the beginning of the file.
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if( !in->at( 0 ) ) { delete ktempf; return; }
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// 0 or -1 is EOF / error
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while( ( size = in->readBlock( b.data(), 4096 ) ) > 0 ) {
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if( ( io->ioDevice()->writeBlock( b.data(), size ) ) == -1 ) {
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delete ktempf;
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return;
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} // if
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} // while
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io->ioDevice()->flush();
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delete ktempf;
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// see if we've left the while loop due to an error.
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if( size == -1 ) return;
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} // if
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// everything went fine
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io->setStatus( IO_Ok );
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} // kimgio_jp2_write
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#endif // HAVE_JASPER
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