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1 : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /*
3 : * This file is part of the LibreOffice project.
4 : *
5 : * This Source Code Form is subject to the terms of the Mozilla Public
6 : * License, v. 2.0. If a copy of the MPL was not distributed with this
7 : * file, You can obtain one at http://mozilla.org/MPL/2.0/.
8 : *
9 : * This file incorporates work covered by the following license notice:
10 : *
11 : * Licensed to the Apache Software Foundation (ASF) under one or more
12 : * contributor license agreements. See the NOTICE file distributed
13 : * with this work for additional information regarding copyright
14 : * ownership. The ASF licenses this file to you under the Apache
15 : * License, Version 2.0 (the "License"); you may not use this file
16 : * except in compliance with the License. You may obtain a copy of
17 : * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18 : */
19 :
20 :
21 : #include "rtl/alloc.h"
22 : #include <vcl/graph.hxx>
23 : #include <vcl/bmpacc.hxx>
24 : #include <vcl/svapp.hxx>
25 : #include <vcl/fltcall.hxx>
26 : #include <svl/solar.hrc>
27 : #include <vcl/FilterConfigItem.hxx>
28 :
29 : //============================ PCDReader ==================================
30 :
31 : // these resolutions are contained in a PCD file:
32 : enum PCDResolution {
33 : PCDRES_BASE16, // 192 x 128
34 : PCDRES_BASE4, // 384 x 256
35 : PCDRES_BASE, // 768 x 512
36 : // the following ones are compressed
37 : // and CANNOT be read by us
38 : PCDRES_4BASE, // 1536 x 1024
39 : PCDRES_16BASE // 3072 x 3072
40 : };
41 :
42 : class PCDReader {
43 :
44 : private:
45 :
46 : bool bStatus;
47 :
48 : sal_uLong nLastPercent;
49 :
50 : SvStream &m_rPCD;
51 : BitmapWriteAccess* mpAcc;
52 :
53 : sal_uInt8 nOrientation; // orientation of the picture withinthe PCD file:
54 : // 0 - spire point up
55 : // 1 - spire points to the right
56 : // 2 - spire points down
57 : // 3 - spire points to the left
58 :
59 : PCDResolution eResolution; // which resolution we want
60 :
61 : sal_uLong nWidth; // width of the PCD picture
62 : sal_uLong nHeight; // height of the PCD picture
63 : sal_uLong nImagePos; // position of the picture within the PCD file
64 :
65 : // temporary lLue-Green-Red-Bitmap
66 : sal_uLong nBMPWidth;
67 : sal_uLong nBMPHeight;
68 :
69 : void MayCallback(sal_uLong nPercent);
70 :
71 : void CheckPCDImagePacFile();
72 : // checks whether it's a Photo-CD file with 'Image Pac'
73 :
74 : void ReadOrientation();
75 : // reads the orientation and sets nOrientation
76 :
77 : void ReadImage(sal_uLong nMinPercent, sal_uLong nMaxPercent);
78 :
79 : public:
80 :
81 0 : PCDReader(SvStream &rStream)
82 : : bStatus(false)
83 : , nLastPercent(0)
84 : , m_rPCD(rStream)
85 : , mpAcc(NULL)
86 : , nOrientation(0)
87 : , eResolution(PCDRES_BASE16)
88 : , nWidth(0)
89 : , nHeight(0)
90 : , nImagePos(0)
91 : , nBMPWidth(0)
92 0 : , nBMPHeight(0)
93 : {
94 0 : }
95 :
96 : bool ReadPCD( Graphic & rGraphic, FilterConfigItem* pConfigItem );
97 : };
98 :
99 : //=================== Methods of PCDReader ==============================
100 :
101 0 : bool PCDReader::ReadPCD( Graphic & rGraphic, FilterConfigItem* pConfigItem )
102 : {
103 0 : Bitmap aBmp;
104 :
105 0 : bStatus = true;
106 0 : nLastPercent = 0;
107 :
108 0 : MayCallback( 0 );
109 :
110 : // is it a PCD file with a picture? ( sets bStatus == sal_False, if that's not the case):
111 0 : CheckPCDImagePacFile();
112 :
113 : // read orientation of the picture:
114 0 : ReadOrientation();
115 :
116 : // which resolution do we want?:
117 0 : eResolution = PCDRES_BASE;
118 0 : if ( pConfigItem )
119 : {
120 0 : sal_Int32 nResolution = pConfigItem->ReadInt32( "Resolution", 2 );
121 0 : if ( nResolution == 1 )
122 0 : eResolution = PCDRES_BASE4;
123 0 : else if ( nResolution == 0 )
124 0 : eResolution = PCDRES_BASE16;
125 : }
126 : // determine size and position (position within the PCD file) of the picture:
127 0 : switch (eResolution)
128 : {
129 : case PCDRES_BASE16 :
130 0 : nWidth = 192;
131 0 : nHeight = 128;
132 0 : nImagePos = 8192;
133 0 : break;
134 :
135 : case PCDRES_BASE4 :
136 0 : nWidth = 384;
137 0 : nHeight = 256;
138 0 : nImagePos = 47104;
139 0 : break;
140 :
141 : case PCDRES_BASE :
142 0 : nWidth = 768;
143 0 : nHeight = 512;
144 0 : nImagePos = 196608;
145 0 : break;
146 :
147 : default:
148 0 : bStatus = false;
149 : }
150 0 : if ( bStatus )
151 : {
152 0 : if ( ( nOrientation & 0x01 ) == 0 )
153 : {
154 0 : nBMPWidth = nWidth;
155 0 : nBMPHeight = nHeight;
156 : }
157 : else
158 : {
159 0 : nBMPWidth = nHeight;
160 0 : nBMPHeight = nWidth;
161 : }
162 0 : aBmp = Bitmap( Size( nBMPWidth, nBMPHeight ), 24 );
163 0 : if ( ( mpAcc = aBmp.AcquireWriteAccess() ) == 0 )
164 0 : return false;
165 :
166 0 : ReadImage( 5 ,65 );
167 :
168 0 : aBmp.ReleaseAccess( mpAcc ), mpAcc = NULL;
169 0 : rGraphic = aBmp;
170 : }
171 0 : return bStatus;
172 : }
173 :
174 :
175 :
176 0 : void PCDReader::MayCallback(sal_uLong /*nPercent*/)
177 : {
178 0 : }
179 :
180 :
181 :
182 0 : void PCDReader::CheckPCDImagePacFile()
183 : {
184 : char Buf[ 8 ];
185 :
186 0 : m_rPCD.Seek( 2048 );
187 0 : m_rPCD.Read( Buf, 7 );
188 0 : Buf[ 7 ] = 0;
189 0 : if (OString(Buf) != "PCD_IPI")
190 0 : bStatus = false;
191 0 : }
192 :
193 :
194 :
195 0 : void PCDReader::ReadOrientation()
196 : {
197 0 : if ( bStatus == false )
198 0 : return;
199 0 : m_rPCD.Seek( 194635 );
200 0 : m_rPCD.ReadUChar( nOrientation );
201 0 : nOrientation &= 0x03;
202 : }
203 :
204 :
205 :
206 0 : void PCDReader::ReadImage(sal_uLong nMinPercent, sal_uLong nMaxPercent)
207 : {
208 : sal_uLong nx,ny,nW2,nH2,nYPair,ndy,nXPair;
209 : long nL,nCb,nCr,nRed,nGreen,nBlue;
210 : sal_uInt8 * pt;
211 : sal_uInt8 * pL0; // luminance for each pixel of the 1st row of the current pair of rows
212 : sal_uInt8 * pL1; // luminance for each pixel of the 2nd row of the current pair of rows
213 : sal_uInt8 * pCb; // blue chrominance for each 2x2 pixel of the current pair of rows
214 : sal_uInt8 * pCr; // red chrominance fuer je 2x2 pixel of the current pair of rows
215 : sal_uInt8 * pL0N, * pL1N, * pCbN, * pCrN; // like above, but for the next pair of rows
216 :
217 0 : if ( bStatus == false )
218 0 : return;
219 :
220 0 : nW2=nWidth>>1;
221 0 : nH2=nHeight>>1;
222 :
223 0 : pL0 =(sal_uInt8*)rtl_allocateMemory( nWidth );
224 0 : pL1 =(sal_uInt8*)rtl_allocateMemory( nWidth );
225 0 : pCb =(sal_uInt8*)rtl_allocateMemory( nW2+1 );
226 0 : pCr =(sal_uInt8*)rtl_allocateMemory( nW2+1 );
227 0 : pL0N=(sal_uInt8*)rtl_allocateMemory( nWidth );
228 0 : pL1N=(sal_uInt8*)rtl_allocateMemory( nWidth );
229 0 : pCbN=(sal_uInt8*)rtl_allocateMemory( nW2+1 );
230 0 : pCrN=(sal_uInt8*)rtl_allocateMemory( nW2+1 );
231 :
232 0 : if ( pL0 == NULL || pL1 == NULL || pCb == NULL || pCr == NULL ||
233 0 : pL0N == NULL || pL1N == NULL || pCbN == NULL || pCrN == NULL)
234 : {
235 0 : rtl_freeMemory((void*)pL0 );
236 0 : rtl_freeMemory((void*)pL1 );
237 0 : rtl_freeMemory((void*)pCb );
238 0 : rtl_freeMemory((void*)pCr );
239 0 : rtl_freeMemory((void*)pL0N);
240 0 : rtl_freeMemory((void*)pL1N);
241 0 : rtl_freeMemory((void*)pCbN);
242 0 : rtl_freeMemory((void*)pCrN);
243 0 : bStatus = false;
244 0 : return;
245 : }
246 :
247 0 : m_rPCD.Seek( nImagePos );
248 :
249 : // next pair of rows := first pair of rows:
250 0 : m_rPCD.Read( pL0N, nWidth );
251 0 : m_rPCD.Read( pL1N, nWidth );
252 0 : m_rPCD.Read( pCbN, nW2 );
253 0 : m_rPCD.Read( pCrN, nW2 );
254 0 : pCbN[ nW2 ] = pCbN[ nW2 - 1 ];
255 0 : pCrN[ nW2 ] = pCrN[ nW2 - 1 ];
256 :
257 0 : for ( nYPair = 0; nYPair < nH2; nYPair++ )
258 : {
259 : // current pair of rows := next pair of rows:
260 0 : pt=pL0; pL0=pL0N; pL0N=pt;
261 0 : pt=pL1; pL1=pL1N; pL1N=pt;
262 0 : pt=pCb; pCb=pCbN; pCbN=pt;
263 0 : pt=pCr; pCr=pCrN; pCrN=pt;
264 :
265 : // get the next pair of rows:
266 0 : if ( nYPair < nH2 - 1 )
267 : {
268 0 : m_rPCD.Read( pL0N, nWidth );
269 0 : m_rPCD.Read( pL1N, nWidth );
270 0 : m_rPCD.Read( pCbN, nW2 );
271 0 : m_rPCD.Read( pCrN, nW2 );
272 0 : pCbN[nW2]=pCbN[ nW2 - 1 ];
273 0 : pCrN[nW2]=pCrN[ nW2 - 1 ];
274 : }
275 : else
276 : {
277 0 : for ( nXPair = 0; nXPair < nW2; nXPair++ )
278 : {
279 0 : pCbN[ nXPair ] = pCb[ nXPair ];
280 0 : pCrN[ nXPair ] = pCr[ nXPair ];
281 : }
282 : }
283 :
284 : // loop trough both rows of the pair of rows:
285 0 : for ( ndy = 0; ndy < 2; ndy++ )
286 : {
287 0 : ny = ( nYPair << 1 ) + ndy;
288 :
289 : // loop trough X:
290 0 : for ( nx = 0; nx < nWidth; nx++ )
291 : {
292 : // get/calculate nL,nCb,nCr for the pixel nx,ny:
293 0 : nXPair = nx >> 1;
294 0 : if ( ndy == 0 )
295 : {
296 0 : nL = (long)pL0[ nx ];
297 0 : if (( nx & 1 ) == 0 )
298 : {
299 0 : nCb = (long)pCb[ nXPair ];
300 0 : nCr = (long)pCr[ nXPair ];
301 : }
302 : else
303 : {
304 0 : nCb = ( ( (long)pCb[ nXPair ] ) + ( (long)pCb[ nXPair + 1 ] ) ) >> 1;
305 0 : nCr = ( ( (long)pCr[ nXPair ] ) + ( (long)pCr[ nXPair + 1 ] ) ) >> 1;
306 : }
307 : }
308 : else {
309 0 : nL = pL1[ nx ];
310 0 : if ( ( nx & 1 ) == 0 )
311 : {
312 0 : nCb = ( ( (long)pCb[ nXPair ] ) + ( (long)pCbN[ nXPair ] ) ) >> 1;
313 0 : nCr = ( ( (long)pCr[ nXPair ] ) + ( (long)pCrN[ nXPair ] ) ) >> 1;
314 : }
315 : else
316 : {
317 0 : nCb = ( ( (long)pCb[ nXPair ] ) + ( (long)pCb[ nXPair + 1 ] ) +
318 0 : ( (long)pCbN[ nXPair ] ) + ( (long)pCbN[ nXPair + 1 ] ) ) >> 2;
319 0 : nCr = ( ( (long)pCr[ nXPair ] ) + ( (long)pCr[ nXPair + 1] ) +
320 0 : ( (long)pCrN[ nXPair ] ) + ( (long)pCrN[ nXPair + 1 ] ) ) >> 2;
321 : }
322 : }
323 : // conversion of nL,nCb,nCr in nRed,nGreen,nBlue:
324 0 : nL *= 89024L;
325 0 : nCb -= 156;
326 0 : nCr -= 137;
327 0 : nRed = ( nL + nCr * 119374L + 0x8000 ) >> 16;
328 0 : if ( nRed < 0 )
329 0 : nRed = 0;
330 0 : if ( nRed > 255)
331 0 : nRed = 255;
332 0 : nGreen = ( nL - nCb * 28198L - nCr * 60761L + 0x8000 ) >> 16;
333 0 : if ( nGreen < 0 )
334 0 : nGreen = 0;
335 0 : if ( nGreen > 255 )
336 0 : nGreen = 255;
337 0 : nBlue = ( nL + nCb * 145352L + 0x8000 ) >> 16;
338 0 : if ( nBlue < 0 )
339 0 : nBlue = 0;
340 0 : if ( nBlue > 255 )
341 0 : nBlue = 255;
342 :
343 : // register color value in pBMPMap:
344 0 : if ( nOrientation < 2 )
345 : {
346 0 : if ( nOrientation == 0 )
347 0 : mpAcc->SetPixel( ny, nx, BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
348 : else
349 0 : mpAcc->SetPixel( nWidth - 1 - nx, ny, BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
350 : }
351 : else
352 : {
353 0 : if ( nOrientation == 2 )
354 0 : mpAcc->SetPixel( nHeight - 1 - ny, ( nWidth - 1 - nx ), BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
355 : else
356 0 : mpAcc->SetPixel( nx, ( nHeight - 1 - ny ), BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
357 : }
358 : }
359 : }
360 :
361 0 : if ( m_rPCD.GetError() )
362 0 : bStatus = false;
363 0 : MayCallback( nMinPercent + ( nMaxPercent - nMinPercent ) * nYPair / nH2 );
364 0 : if ( bStatus == false )
365 0 : break;
366 : }
367 0 : rtl_freeMemory((void*)pL0 );
368 0 : rtl_freeMemory((void*)pL1 );
369 0 : rtl_freeMemory((void*)pCb );
370 0 : rtl_freeMemory((void*)pCr );
371 0 : rtl_freeMemory((void*)pL0N);
372 0 : rtl_freeMemory((void*)pL1N);
373 0 : rtl_freeMemory((void*)pCbN);
374 0 : rtl_freeMemory((void*)pCrN);
375 : }
376 :
377 : //================== GraphicImport - the exported Function ================
378 :
379 : // this needs to be kept in sync with
380 : // ImpFilterLibCacheEntry::GetImportFunction() from
381 : // vcl/source/filter/graphicfilter.cxx
382 : #if defined(DISABLE_DYNLOADING)
383 : #define GraphicImport icdGraphicImport
384 : #endif
385 :
386 : extern "C" SAL_DLLPUBLIC_EXPORT bool SAL_CALL
387 0 : GraphicImport( SvStream & rStream, Graphic & rGraphic, FilterConfigItem* pConfigItem )
388 : {
389 0 : PCDReader aPCDReader(rStream);
390 0 : return aPCDReader.ReadPCD(rGraphic, pConfigItem);
391 0 : }
392 :
393 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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