summaryrefslogtreecommitdiffstats
path: root/kimgio/jp2.cpp
blob: 68075cf96129676b966716b15fc57c1a17921452 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
// This library is distributed under the conditions of the GNU LGPL.
#include "config.h"

#ifdef HAVE_JASPER
#include <unistd.h>
#include "jp2.h"

#if !defined(__STDC_LIMIT_MACROS)
#define __STDC_LIMIT_MACROS
#endif

#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#include <tdetempfile.h>
#include <tqcolor.h>
#include <tqcstring.h>
#include <tqfile.h>
#include <tqimage.h>

// dirty, but avoids a warning because jasper.h includes jas_config.h.
#undef PACKAGE
#undef VERSION
#include <jasper/jasper.h>

// code taken in parts from JasPer's jiv.c

#define DEFAULT_RATE 0.10
#define MAXCMPTS 256


typedef struct {
    jas_image_t* image;

    int	cmptlut[MAXCMPTS];

    jas_image_t* altimage;
} gs_t;


jas_image_t*
read_image( const TQImageIO* io )
{
    jas_stream_t* in = 0;
    // for QIODevice's other than TQFile, a temp. file is used.
    KTempFile* tempf = 0;

    TQFile* qf = 0;
    if( ( qf = dynamic_cast<TQFile*>( io->ioDevice() ) ) ) {
        // great, it's a TQFile. Let's just take the filename.
        in = jas_stream_fopen( TQFile::encodeName( qf->name() ), "rb" );
    } else {
        // not a TQFile. Copy the whole data to a temp. file.
        tempf = new KTempFile();
        if( tempf->status() != 0 ) {
            delete tempf;
            return 0;
        } // if
        tempf->setAutoDelete( true );
        TQFile* out = tempf->file();
        // 4096 (=4k) is a common page size.
        TQByteArray b( 4096 );
        TQ_LONG size;
        // 0 or -1 is EOF / error
        while( ( size = io->ioDevice()->readBlock( b.data(), 4096 ) ) > 0 ) {
            // in case of a write error, still give the decoder a try
            if( ( out->writeBlock( b.data(), size ) ) == -1 ) break;
        } // while
        // flush everything out to disk
        out->flush();

        in = jas_stream_fopen( TQFile::encodeName( tempf->name() ), "rb" );
    } // else
    if( !in ) {
        delete tempf;
        return 0;
    } // if

    jas_image_t* image = jas_image_decode( in, -1, 0 );
    jas_stream_close( in );
    delete tempf;

    // image may be 0, but that's Ok
    return image;
} // read_image

static bool
convert_colorspace( gs_t& gs )
{
    jas_cmprof_t *outprof = jas_cmprof_createfromclrspc( JAS_CLRSPC_SRGB );
    if( !outprof ) return false;

    gs.altimage = jas_image_chclrspc( gs.image, outprof,
                                      JAS_CMXFORM_INTENT_PER );
    if( !gs.altimage ) return false;

    return true;
} // convert_colorspace

static bool
render_view( gs_t& gs, TQImage& qti )
{
    if((gs.cmptlut[0] = jas_image_getcmptbytype(gs.altimage,
                                                JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_R))) < 0 ||
       (gs.cmptlut[1] = jas_image_getcmptbytype(gs.altimage,
                                                JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_G))) < 0 ||
       (gs.cmptlut[2] = jas_image_getcmptbytype(gs.altimage,
                                                JAS_IMAGE_CT_COLOR(JAS_CLRSPC_CHANIND_RGB_B))) < 0) {
        return false;
    } // if

    const int* cmptlut = gs.cmptlut;
    int v[3];

    // check that all components have the same size.
    const int width = jas_image_cmptwidth( gs.altimage, cmptlut[0] );
    const int height = jas_image_cmptheight( gs.altimage, cmptlut[0] );
    for( int i = 1; i < 3; ++i ) {
        if (jas_image_cmptwidth( gs.altimage, cmptlut[i] ) != width ||
            jas_image_cmptheight( gs.altimage, cmptlut[i] ) != height)
            return false;
    } // for

    if( !qti.create( jas_image_width( gs.altimage ),
                     jas_image_height( gs.altimage ), 32 ) )
        return false;

    uint32_t* data = (uint32_t*)qti.bits();

    for( int y = 0; y < height; ++y ) {
        for( int x = 0; x < width; ++x ) {
            for( int k = 0; k < 3; ++k ) {
                v[k] = jas_image_readcmptsample( gs.altimage, cmptlut[k], x, y );
                // if the precision of the component is too small, increase
                // it to use the complete value range.
                v[k] <<= 8 - jas_image_cmptprec( gs.altimage, cmptlut[k] );

                if( v[k] < 0 ) v[k] = 0;
                else if( v[k] > 255 ) v[k] = 255;
            } // for k

            *data++ = tqRgb( v[0], v[1], v[2] );
        } // for x
    } // for y
    return true;
} // render_view


KDE_EXPORT void
kimgio_jp2_read( TQImageIO* io )
{
	if( jas_init() ) return;

	gs_t gs;
	if( !(gs.image = read_image( io )) ) return;

	if( !convert_colorspace( gs ) ) return;

	TQImage image;
	render_view( gs, image );

	if( gs.image ) jas_image_destroy( gs.image );
	if( gs.altimage ) jas_image_destroy( gs.altimage );

	io->setImage( image );
	io->setStatus( 0 );
} // kimgio_jp2_read


static jas_image_t*
create_image( const TQImage& qi )
{
    // prepare the component parameters
    jas_image_cmptparm_t* cmptparms = new jas_image_cmptparm_t[ 3 ];

    for ( int i = 0; i < 3; ++i ) {
        // x and y offset
        cmptparms[i].tlx = 0;
        cmptparms[i].tly = 0;

        // the resulting image will be hstep*width x vstep*height !
        cmptparms[i].hstep = 1;
        cmptparms[i].vstep = 1;
        cmptparms[i].width = qi.width();
        cmptparms[i].height = qi.height();

        // we write everything as 24bit truecolor ATM
        cmptparms[i].prec = 8;
        cmptparms[i].sgnd = false;
    }

    jas_image_t* ji = jas_image_create( 3 /* number components */, cmptparms, JAS_CLRSPC_UNKNOWN );
    delete[] cmptparms;

    // returning 0 is ok
    return ji;
} // create_image


static bool
write_components( jas_image_t* ji, const TQImage& qi )
{
    const unsigned height = qi.height();
    const unsigned width = qi.width();

    jas_matrix_t* m = jas_matrix_create( height, width );
    if( !m ) return false;

    jas_image_setclrspc( ji, JAS_CLRSPC_SRGB );

    jas_image_setcmpttype( ji, 0, JAS_IMAGE_CT_RGB_R );
    for( uint y = 0; y < height; ++y )
        for( uint x = 0; x < width; ++x )
            jas_matrix_set( m, y, x, tqRed( qi.pixel( x, y ) ) );
    jas_image_writecmpt( ji, 0, 0, 0, width, height, m );

    jas_image_setcmpttype( ji, 1, JAS_IMAGE_CT_RGB_G );
    for( uint y = 0; y < height; ++y )
        for( uint x = 0; x < width; ++x )
            jas_matrix_set( m, y, x, tqGreen( qi.pixel( x, y ) ) );
    jas_image_writecmpt( ji, 1, 0, 0, width, height, m );

    jas_image_setcmpttype( ji, 2, JAS_IMAGE_CT_RGB_B );
    for( uint y = 0; y < height; ++y )
        for( uint x = 0; x < width; ++x )
            jas_matrix_set( m, y, x, tqBlue( qi.pixel( x, y ) ) );
    jas_image_writecmpt( ji, 2, 0, 0, width, height, m );
    jas_matrix_destroy( m );

    return true;
} // write_components

KDE_EXPORT void
kimgio_jp2_write( TQImageIO* io )
{
	if( jas_init() ) return;

	// open the stream. we write directly to the file if possible, to a
	// temporary file otherwise.
	jas_stream_t* stream = 0;

	TQFile* qf = 0;
	KTempFile* ktempf = 0;
	if( ( qf = dynamic_cast<TQFile*>( io->ioDevice() ) ) ) {
		// jas_stream_fdopen works here, but not when reading...
		stream = jas_stream_fdopen( dup( qf->handle() ), "w" );
	} else {
		ktempf = new KTempFile;
		ktempf->setAutoDelete( true );
		stream = jas_stream_fdopen( dup( ktempf->handle()), "w" );
	} // else


	// by here, a jas_stream_t is open
	if( !stream ) return;

	jas_image_t* ji = create_image( io->image() );
	if( !ji ) {
		delete ktempf;
		jas_stream_close( stream );
		return;
	} // if

	if( !write_components( ji, io->image() ) ) {
		delete ktempf;
		jas_stream_close( stream );
		jas_image_destroy( ji );
		return;
	} // if

	// optstr:
	// - rate=#B => the resulting file size is about # bytes
	// - rate=0.0 .. 1.0 => the resulting file size is about the factor times
	//                      the uncompressed size
	TQString rate;
	TQTextStream ts( &rate, IO_WriteOnly );
	ts << "rate="
		<< ( (io->quality() < 0) ? DEFAULT_RATE : io->quality() / 100.0F );
#	if defined(JAS_VERSION_MAJOR) && (JAS_VERSION_MAJOR >= 3)
	const jas_image_fmtinfo_t *jp2_fmtinfo = jas_image_lookupfmtbyname("jp2");
	int i = -1;
	if (jp2_fmtinfo)
	{
		i = jas_image_encode(ji, stream, jp2_fmtinfo->id, rate.utf8().data());
	}
#	else
	int i = jp2_encode( ji, stream, rate.utf8().data() );
#	endif

	jas_image_destroy( ji );
	jas_stream_close( stream );

	if( i != 0 ) { delete ktempf; return; }

	if( ktempf ) {
		// We've written to a tempfile. Copy the data to the final destination.
		TQFile* in = ktempf->file();

		TQByteArray b( 4096 );
		TQ_LONG size;

		// seek to the beginning of the file.
		if( !in->at( 0 ) ) { delete ktempf; return; }

		// 0 or -1 is EOF / error
		while( ( size = in->readBlock( b.data(), 4096 ) ) > 0 ) {
			if( ( io->ioDevice()->writeBlock( b.data(), size ) ) == -1 ) {
				delete ktempf;
				return;
			} // if
		} // while
		io->ioDevice()->flush();
		delete ktempf;

		// see if we've left the while loop due to an error.
		if( size == -1 ) return;
	} // if


	// everything went fine
	io->setStatus( IO_Ok );
} // kimgio_jp2_write

#endif // HAVE_JASPER