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
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <sal/config.h>
#include "stdio.h"
#include "jpeg.h"
#include <jpeglib.h>
#include <jerror.h>
#include "JpegReader.hxx"
#include <vcl/bmpacc.hxx>
#include <vcl/FilterConfigItem.hxx>
#include <vcl/graphicfilter.hxx>
#include <tools/fract.hxx>
#include <boost/scoped_array.hpp>
#define JPEG_MIN_READ 512
#define BUFFER_SIZE 4096
namespace {
// Arbitrary maximal size (512M) of a bitmap after it has been decoded.
// It is used to prevent excessive swapping due to large buffers in
// virtual memory.
// May have to be tuned if it turns out to be too large or too small.
static const sal_uInt64 MAX_BITMAP_BYTE_SIZE = sal_uInt64(512 * 1024 * 1024);
}
/* Expanded data source object for stdio input */
struct SourceManagerStruct {
jpeg_source_mgr pub; /* public fields */
SvStream* stream; /* source stream */
JOCTET* buffer; /* start of buffer */
boolean start_of_file; /* have we gotten any data yet? */
};
/*
* Initialize source --- called by jpeg_read_header
* before any data is actually read.
*/
extern "C" void init_source (j_decompress_ptr cinfo)
{
SourceManagerStruct * source = reinterpret_cast<SourceManagerStruct *>(cinfo->src);
/* We reset the empty-input-file flag for each image,
* but we don't clear the input buffer.
* This is correct behavior for reading a series of images from one source.
*/
source->start_of_file = TRUE;
}
long StreamRead( SvStream* pStream, void* pBuffer, long nBufferSize )
{
long nRead = 0;
if( pStream->GetError() != ERRCODE_IO_PENDING )
{
long nInitialPosition = pStream->Tell();
nRead = (long) pStream->Read( pBuffer, nBufferSize );
if( pStream->GetError() == ERRCODE_IO_PENDING )
{
// in order to search from the old position
// we temporarily reset the error
pStream->ResetError();
pStream->Seek( nInitialPosition );
pStream->SetError( ERRCODE_IO_PENDING );
}
}
return nRead;
}
extern "C" boolean fill_input_buffer (j_decompress_ptr cinfo)
{
SourceManagerStruct * source = reinterpret_cast<SourceManagerStruct *>(cinfo->src);
size_t nbytes;
nbytes = StreamRead(source->stream, source->buffer, BUFFER_SIZE);
if (!nbytes)
{
if (source->start_of_file) /* Treat empty input file as fatal error */
{
ERREXIT(cinfo, JERR_INPUT_EMPTY);
}
WARNMS(cinfo, JWRN_JPEG_EOF);
/* Insert a fake EOI marker */
source->buffer[0] = (JOCTET) 0xFF;
source->buffer[1] = (JOCTET) JPEG_EOI;
nbytes = 2;
}
source->pub.next_input_byte = source->buffer;
source->pub.bytes_in_buffer = nbytes;
source->start_of_file = FALSE;
return TRUE;
}
extern "C" void skip_input_data (j_decompress_ptr cinfo, long numberOfBytes)
{
SourceManagerStruct * source = reinterpret_cast<SourceManagerStruct *>(cinfo->src);
/* Just a dumb implementation for now. Could use fseek() except
* it doesn't work on pipes. Not clear that being smart is worth
* any trouble anyway --- large skips are infrequent.
*/
if (numberOfBytes > 0)
{
while (numberOfBytes > (long) source->pub.bytes_in_buffer)
{
numberOfBytes -= (long) source->pub.bytes_in_buffer;
(void) fill_input_buffer(cinfo);
/* note we assume that fill_input_buffer will never return false,
* so suspension need not be handled.
*/
}
source->pub.next_input_byte += (size_t) numberOfBytes;
source->pub.bytes_in_buffer -= (size_t) numberOfBytes;
}
}
extern "C" void term_source (j_decompress_ptr)
{
/* no work necessary here */
}
void jpeg_svstream_src (j_decompress_ptr cinfo, void* input)
{
SourceManagerStruct * source;
SvStream* stream = static_cast<SvStream*>(input);
/* The source object and input buffer are made permanent so that a series
* of JPEG images can be read from the same file by calling jpeg_stdio_src
* only before the first one. (If we discarded the buffer at the end of
* one image, we'd likely lose the start of the next one.)
* This makes it unsafe to use this manager and a different source
* manager serially with the same JPEG object. Caveat programmer.
*/
if (cinfo->src == NULL)
{ /* first time for this JPEG object? */
cinfo->src = static_cast<jpeg_source_mgr *>(
(*cinfo->mem->alloc_small) (reinterpret_cast<j_common_ptr>(cinfo), JPOOL_PERMANENT, sizeof(SourceManagerStruct)));
source = reinterpret_cast<SourceManagerStruct *>(cinfo->src);
source->buffer = static_cast<JOCTET *>(
(*cinfo->mem->alloc_small) (reinterpret_cast<j_common_ptr>(cinfo), JPOOL_PERMANENT, BUFFER_SIZE * sizeof(JOCTET)));
}
source = reinterpret_cast<SourceManagerStruct *>(cinfo->src);
source->pub.init_source = init_source;
source->pub.fill_input_buffer = fill_input_buffer;
source->pub.skip_input_data = skip_input_data;
source->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
source->pub.term_source = term_source;
source->stream = stream;
source->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */
source->pub.next_input_byte = NULL; /* until buffer loaded */
}
JPEGReader::JPEGReader( SvStream& rStream, void* /*pCallData*/, bool bSetLogSize ) :
mrStream ( rStream ),
mpAcc ( NULL ),
mpAcc1 ( NULL ),
mpBuffer ( NULL ),
mnLastPos ( rStream.Tell() ),
mnLastLines ( 0 ),
mbSetLogSize ( bSetLogSize )
{
maUpperName = "SVIJPEG";
mnFormerPos = mnLastPos;
}
JPEGReader::~JPEGReader()
{
if( mpBuffer )
delete[] mpBuffer;
if( mpAcc )
Bitmap::ReleaseAccess( mpAcc );
if( mpAcc1 )
Bitmap::ReleaseAccess( mpAcc1 );
}
unsigned char * JPEGReader::CreateBitmap( JPEGCreateBitmapParam * pParam )
{
if (pParam->nWidth > SAL_MAX_INT32 / 8 || pParam->nHeight > SAL_MAX_INT32 / 8)
return NULL; // avoid overflows later
if (pParam->nWidth == 0 || pParam->nHeight == 0)
return NULL;
Size aSize( pParam->nWidth, pParam->nHeight );
bool bGray = pParam->bGray != 0;
unsigned char * pBmpBuf = NULL;
if( mpAcc )
{
Bitmap::ReleaseAccess( mpAcc );
maBmp = Bitmap();
mpAcc = NULL;
}
sal_uInt64 nSize = aSize.Width();
nSize *= aSize.Height();
if (nSize > SAL_MAX_INT32 / (bGray?1:3))
return NULL;
// Check if the bitmap is untypically large.
if (nSize*(bGray?1:3) > MAX_BITMAP_BYTE_SIZE)
{
// Do not try to acquire resources for the large bitmap or to
// read the bitmap into memory.
return NULL;
}
if( bGray )
{
BitmapPalette aGrayPal( 256 );
for( sal_uInt16 n = 0; n < 256; n++ )
{
const sal_uInt8 cGray = (sal_uInt8) n;
aGrayPal[ n ] = BitmapColor( cGray, cGray, cGray );
}
maBmp = Bitmap( aSize, 8, &aGrayPal );
}
else
{
maBmp = Bitmap( aSize, 24 );
}
if ( mbSetLogSize )
{
unsigned long nUnit = pParam->density_unit;
if( ( ( 1 == nUnit ) || ( 2 == nUnit ) ) && pParam->X_density && pParam->Y_density )
{
Point aEmptyPoint;
Fraction aFractX( 1, pParam->X_density );
Fraction aFractY( 1, pParam->Y_density );
MapMode aMapMode( nUnit == 1 ? MAP_INCH : MAP_CM, aEmptyPoint, aFractX, aFractY );
Size aPrefSize = OutputDevice::LogicToLogic( aSize, aMapMode, MAP_100TH_MM );
maBmp.SetPrefSize( aPrefSize );
maBmp.SetPrefMapMode( MapMode( MAP_100TH_MM ) );
}
}
mpAcc = maBmp.AcquireWriteAccess();
if( mpAcc )
{
const sal_uLong nFormat = mpAcc->GetScanlineFormat();
if(
( bGray && ( BMP_FORMAT_8BIT_PAL == nFormat ) ) ||
( !bGray && ( BMP_FORMAT_24BIT_TC_RGB == nFormat ) )
)
{
pBmpBuf = mpAcc->GetBuffer();
pParam->nAlignedWidth = mpAcc->GetScanlineSize();
pParam->bTopDown = mpAcc->IsTopDown();
}
else
{
pParam->nAlignedWidth = AlignedWidth4Bytes( aSize.Width() * ( bGray ? 8 : 24 ) );
pParam->bTopDown = true;
pBmpBuf = mpBuffer = new unsigned char[pParam->nAlignedWidth * aSize.Height()];
}
}
// clean up, if no Bitmap buffer can be provided.
if ( !pBmpBuf )
{
Bitmap::ReleaseAccess( mpAcc );
maBmp = Bitmap();
mpAcc = NULL;
}
return pBmpBuf;
}
void JPEGReader::FillBitmap()
{
if( mpBuffer && mpAcc )
{
unsigned char * pTmp;
BitmapColor aColor;
long nAlignedWidth;
long nWidth = mpAcc->Width();
long nHeight = mpAcc->Height();
if( mpAcc->GetBitCount() == 8 )
{
boost::scoped_array<BitmapColor> pCols(new BitmapColor[ 256 ]);
for( sal_uInt16 n = 0; n < 256; n++ )
{
const sal_uInt8 cGray = (sal_uInt8) n;
pCols[ n ] = mpAcc->GetBestMatchingColor( BitmapColor( cGray, cGray, cGray ) );
}
nAlignedWidth = AlignedWidth4Bytes( mpAcc->Width() * 8L );
for( long nY = 0L; nY < nHeight; nY++ )
{
pTmp = (sal_uInt8*) mpBuffer + nY * nAlignedWidth;
for( long nX = 0L; nX < nWidth; nX++ )
{
mpAcc->SetPixel( nY, nX, pCols[ *pTmp++ ] );
}
}
}
else
{
nAlignedWidth = AlignedWidth4Bytes( mpAcc->Width() * 24L );
for( long nY = 0L; nY < nHeight; nY++ )
{
// #i122985# Added fast-lane implementations using CopyScanline with direct supported mem formats
static bool bCheckOwnReader(true);
if(bCheckOwnReader)
{
// #i122985# Trying to copy the RGB data from jpeg import to make things faster. Unfortunately
// it has no GBR format, so RGB three-byte groups need to be 'flipped' to GBR first,
// then CopyScanline can use a memcpy to do the data transport. CopyScanline can also
// do the needed conversion from BMP_FORMAT_24BIT_TC_RGB (and it works well), but this
// is not faster that the old loop below using SetPixel.
sal_uInt8* aSource((sal_uInt8*)mpBuffer + nY * nAlignedWidth);
sal_uInt8* aEnd(aSource + (nWidth * 3));
for(sal_uInt8* aTmp(aSource); aTmp < aEnd; aTmp += 3)
{
::std::swap(*aTmp, *(aTmp + 2));
}
mpAcc->CopyScanline(nY, aSource, BMP_FORMAT_24BIT_TC_BGR, nWidth * 3);
}
else
{
// old version: WritePixel
pTmp = (sal_uInt8*) mpBuffer + nY * nAlignedWidth;
for( long nX = 0L; nX < nWidth; nX++ )
{
aColor.SetRed( *pTmp++ );
aColor.SetGreen( *pTmp++ );
aColor.SetBlue( *pTmp++ );
mpAcc->SetPixel( nY, nX, aColor );
}
}
}
}
}
}
Graphic JPEGReader::CreateIntermediateGraphic( const Bitmap& rBitmap, long nLines )
{
Graphic aGraphic;
const Size aSizePixel( rBitmap.GetSizePixel() );
if( !mnLastLines )
{
if( mpAcc1 )
{
Bitmap::ReleaseAccess( mpAcc1 );
}
maBmp1 = Bitmap( rBitmap.GetSizePixel(), 1 );
maBmp1.Erase( Color( COL_WHITE ) );
mpAcc1 = maBmp1.AcquireWriteAccess();
}
if( nLines && ( nLines < aSizePixel.Height() ) )
{
if( mpAcc1 )
{
const long nNewLines = nLines - mnLastLines;
if( nNewLines )
{
mpAcc1->SetFillColor( Color( COL_BLACK ) );
mpAcc1->FillRect( Rectangle( Point( 0, mnLastLines ), Size( mpAcc1->Width(), nNewLines ) ) );
}
Bitmap::ReleaseAccess( mpAcc1 );
aGraphic = BitmapEx( rBitmap, maBmp1 );
mpAcc1 = maBmp1.AcquireWriteAccess();
}
else
{
aGraphic = rBitmap;
}
}
else
aGraphic = rBitmap;
mnLastLines = nLines;
return aGraphic;
}
ReadState JPEGReader::Read( Graphic& rGraphic )
{
long nEndPosition;
long nLines;
ReadState eReadState;
bool bRet = false;
sal_uInt8 cDummy;
// TODO: is it possible to get rid of this seek to the end?
// check if the stream's end is already available
mrStream.Seek( STREAM_SEEK_TO_END );
mrStream.ReadUChar( cDummy );
nEndPosition = mrStream.Tell();
// else check if at least JPEG_MIN_READ bytes can be read
if( mrStream.GetError() == ERRCODE_IO_PENDING )
{
mrStream.ResetError();
if( ( nEndPosition - mnFormerPos ) < JPEG_MIN_READ )
{
mrStream.Seek( mnLastPos );
return JPEGREAD_NEED_MORE;
}
}
// seek back to the original position
mrStream.Seek( mnLastPos );
// read the (partial) image
ReadJPEG( this, &mrStream, &nLines, GetPreviewSize() );
if( mpAcc )
{
if( mpBuffer )
{
FillBitmap();
delete[] mpBuffer;
mpBuffer = NULL;
}
Bitmap::ReleaseAccess( mpAcc );
mpAcc = NULL;
if( mrStream.GetError() == ERRCODE_IO_PENDING )
{
rGraphic = CreateIntermediateGraphic( maBmp, nLines );
}
else
{
rGraphic = maBmp;
}
bRet = true;
}
else if( mrStream.GetError() == ERRCODE_IO_PENDING )
{
bRet = true;
}
// Set status ( Pending has priority )
if( mrStream.GetError() == ERRCODE_IO_PENDING )
{
eReadState = JPEGREAD_NEED_MORE;
mrStream.ResetError();
mnFormerPos = mrStream.Tell();
}
else
{
eReadState = bRet ? JPEGREAD_OK : JPEGREAD_ERROR;
}
return eReadState;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|