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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 <svtools/fltcall.hxx>
26 : #include <svl/solar.hrc>
27 : #include <svtools/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 : sal_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; // heigth 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 0 : : m_rPCD(rStream)
83 : {
84 0 : }
85 0 : ~PCDReader() {}
86 :
87 : sal_Bool ReadPCD( Graphic & rGraphic, FilterConfigItem* pConfigItem );
88 : };
89 :
90 : //=================== Methods of PCDReader ==============================
91 :
92 0 : sal_Bool PCDReader::ReadPCD( Graphic & rGraphic, FilterConfigItem* pConfigItem )
93 : {
94 0 : Bitmap aBmp;
95 :
96 0 : bStatus = sal_True;
97 0 : nLastPercent = 0;
98 :
99 0 : MayCallback( 0 );
100 :
101 : // is it a PCD file with a picture? ( sets bStatus == sal_False, if that's not the case):
102 0 : CheckPCDImagePacFile();
103 :
104 : // read orientation of the picture:
105 0 : ReadOrientation();
106 :
107 : // which resolution do we want?:
108 0 : eResolution = PCDRES_BASE;
109 0 : if ( pConfigItem )
110 : {
111 0 : sal_Int32 nResolution = pConfigItem->ReadInt32( String( RTL_CONSTASCII_USTRINGPARAM( "Resolution" ) ), 2 );
112 0 : if ( nResolution == 1 )
113 0 : eResolution = PCDRES_BASE4;
114 0 : else if ( nResolution == 0 )
115 0 : eResolution = PCDRES_BASE16;
116 : }
117 : // determine size and position (position within the PCD file) of the picture:
118 0 : switch (eResolution)
119 : {
120 : case PCDRES_BASE16 :
121 0 : nWidth = 192;
122 0 : nHeight = 128;
123 0 : nImagePos = 8192;
124 0 : break;
125 :
126 : case PCDRES_BASE4 :
127 0 : nWidth = 384;
128 0 : nHeight = 256;
129 0 : nImagePos = 47104;
130 0 : break;
131 :
132 : case PCDRES_BASE :
133 0 : nWidth = 768;
134 0 : nHeight = 512;
135 0 : nImagePos = 196608;
136 0 : break;
137 :
138 : default:
139 0 : bStatus = sal_False;
140 : }
141 0 : if ( bStatus )
142 : {
143 0 : if ( ( nOrientation & 0x01 ) == 0 )
144 : {
145 0 : nBMPWidth = nWidth;
146 0 : nBMPHeight = nHeight;
147 : }
148 : else
149 : {
150 0 : nBMPWidth = nHeight;
151 0 : nBMPHeight = nWidth;
152 : }
153 0 : aBmp = Bitmap( Size( nBMPWidth, nBMPHeight ), 24 );
154 0 : if ( ( mpAcc = aBmp.AcquireWriteAccess() ) == sal_False )
155 0 : return sal_False;
156 :
157 0 : ReadImage( 5 ,65 );
158 :
159 0 : aBmp.ReleaseAccess( mpAcc ), mpAcc = NULL;
160 0 : rGraphic = aBmp;
161 : }
162 0 : return bStatus;
163 : }
164 :
165 : // -------------------------------------------------------------------------------------------
166 :
167 0 : void PCDReader::MayCallback(sal_uLong /*nPercent*/)
168 : {
169 0 : }
170 :
171 : // -------------------------------------------------------------------------------------------
172 :
173 0 : void PCDReader::CheckPCDImagePacFile()
174 : {
175 : char Buf[ 8 ];
176 :
177 0 : m_rPCD.Seek( 2048 );
178 0 : m_rPCD.Read( Buf, 7 );
179 0 : Buf[ 7 ] = 0;
180 0 : if (!rtl::OString(Buf).equalsL(RTL_CONSTASCII_STRINGPARAM("PCD_IPI")))
181 0 : bStatus = sal_False;
182 0 : }
183 :
184 : // -------------------------------------------------------------------------------------------
185 :
186 0 : void PCDReader::ReadOrientation()
187 : {
188 0 : if ( bStatus == sal_False )
189 0 : return;
190 0 : m_rPCD.Seek( 194635 );
191 0 : m_rPCD >> nOrientation;
192 0 : nOrientation &= 0x03;
193 : }
194 :
195 : // -------------------------------------------------------------------------------------------
196 :
197 0 : void PCDReader::ReadImage(sal_uLong nMinPercent, sal_uLong nMaxPercent)
198 : {
199 : sal_uLong nx,ny,nW2,nH2,nYPair,ndy,nXPair;
200 : long nL,nCb,nCr,nRed,nGreen,nBlue;
201 : sal_uInt8 * pt;
202 : sal_uInt8 * pL0; // luminance for each pixel of the 1st row of the current pair of rows
203 : sal_uInt8 * pL1; // luminance for each pixel of the 2nd row of the current pair of rows
204 : sal_uInt8 * pCb; // blue chrominance for each 2x2 pixel of the current pair of rows
205 : sal_uInt8 * pCr; // red chrominance fuer je 2x2 pixel of the current pair of rows
206 : sal_uInt8 * pL0N, * pL1N, * pCbN, * pCrN; // like above, but for the next pair of rows
207 :
208 0 : if ( bStatus == sal_False )
209 0 : return;
210 :
211 0 : nW2=nWidth>>1;
212 0 : nH2=nHeight>>1;
213 :
214 0 : pL0 =(sal_uInt8*)rtl_allocateMemory( nWidth );
215 0 : pL1 =(sal_uInt8*)rtl_allocateMemory( nWidth );
216 0 : pCb =(sal_uInt8*)rtl_allocateMemory( nW2+1 );
217 0 : pCr =(sal_uInt8*)rtl_allocateMemory( nW2+1 );
218 0 : pL0N=(sal_uInt8*)rtl_allocateMemory( nWidth );
219 0 : pL1N=(sal_uInt8*)rtl_allocateMemory( nWidth );
220 0 : pCbN=(sal_uInt8*)rtl_allocateMemory( nW2+1 );
221 0 : pCrN=(sal_uInt8*)rtl_allocateMemory( nW2+1 );
222 :
223 0 : if ( pL0 == NULL || pL1 == NULL || pCb == NULL || pCr == NULL ||
224 : pL0N == NULL || pL1N == NULL || pCbN == NULL || pCrN == NULL)
225 : {
226 0 : rtl_freeMemory((void*)pL0 );
227 0 : rtl_freeMemory((void*)pL1 );
228 0 : rtl_freeMemory((void*)pCb );
229 0 : rtl_freeMemory((void*)pCr );
230 0 : rtl_freeMemory((void*)pL0N);
231 0 : rtl_freeMemory((void*)pL1N);
232 0 : rtl_freeMemory((void*)pCbN);
233 0 : rtl_freeMemory((void*)pCrN);
234 0 : bStatus = sal_False;
235 0 : return;
236 : }
237 :
238 0 : m_rPCD.Seek( nImagePos );
239 :
240 : // next pair of rows := first pair of rows:
241 0 : m_rPCD.Read( pL0N, nWidth );
242 0 : m_rPCD.Read( pL1N, nWidth );
243 0 : m_rPCD.Read( pCbN, nW2 );
244 0 : m_rPCD.Read( pCrN, nW2 );
245 0 : pCbN[ nW2 ] = pCbN[ nW2 - 1 ];
246 0 : pCrN[ nW2 ] = pCrN[ nW2 - 1 ];
247 :
248 0 : for ( nYPair = 0; nYPair < nH2; nYPair++ )
249 : {
250 : // current pair of rows := next pair of rows:
251 0 : pt=pL0; pL0=pL0N; pL0N=pt;
252 0 : pt=pL1; pL1=pL1N; pL1N=pt;
253 0 : pt=pCb; pCb=pCbN; pCbN=pt;
254 0 : pt=pCr; pCr=pCrN; pCrN=pt;
255 :
256 : // get the next pair of rows:
257 0 : if ( nYPair < nH2 - 1 )
258 : {
259 0 : m_rPCD.Read( pL0N, nWidth );
260 0 : m_rPCD.Read( pL1N, nWidth );
261 0 : m_rPCD.Read( pCbN, nW2 );
262 0 : m_rPCD.Read( pCrN, nW2 );
263 0 : pCbN[nW2]=pCbN[ nW2 - 1 ];
264 0 : pCrN[nW2]=pCrN[ nW2 - 1 ];
265 : }
266 : else
267 : {
268 0 : for ( nXPair = 0; nXPair < nW2; nXPair++ )
269 : {
270 0 : pCbN[ nXPair ] = pCb[ nXPair ];
271 0 : pCrN[ nXPair ] = pCr[ nXPair ];
272 : }
273 : }
274 :
275 : // loop trough both rows of the pair of rows:
276 0 : for ( ndy = 0; ndy < 2; ndy++ )
277 : {
278 0 : ny = ( nYPair << 1 ) + ndy;
279 :
280 : // loop trough X:
281 0 : for ( nx = 0; nx < nWidth; nx++ )
282 : {
283 : // get/calculate nL,nCb,nCr for the pixel nx,ny:
284 0 : nXPair = nx >> 1;
285 0 : if ( ndy == 0 )
286 : {
287 0 : nL = (long)pL0[ nx ];
288 0 : if (( nx & 1 ) == 0 )
289 : {
290 0 : nCb = (long)pCb[ nXPair ];
291 0 : nCr = (long)pCr[ nXPair ];
292 : }
293 : else
294 : {
295 0 : nCb = ( ( (long)pCb[ nXPair ] ) + ( (long)pCb[ nXPair + 1 ] ) ) >> 1;
296 0 : nCr = ( ( (long)pCr[ nXPair ] ) + ( (long)pCr[ nXPair + 1 ] ) ) >> 1;
297 : }
298 : }
299 : else {
300 0 : nL = pL1[ nx ];
301 0 : if ( ( nx & 1 ) == 0 )
302 : {
303 0 : nCb = ( ( (long)pCb[ nXPair ] ) + ( (long)pCbN[ nXPair ] ) ) >> 1;
304 0 : nCr = ( ( (long)pCr[ nXPair ] ) + ( (long)pCrN[ nXPair ] ) ) >> 1;
305 : }
306 : else
307 : {
308 0 : nCb = ( ( (long)pCb[ nXPair ] ) + ( (long)pCb[ nXPair + 1 ] ) +
309 0 : ( (long)pCbN[ nXPair ] ) + ( (long)pCbN[ nXPair + 1 ] ) ) >> 2;
310 0 : nCr = ( ( (long)pCr[ nXPair ] ) + ( (long)pCr[ nXPair + 1] ) +
311 0 : ( (long)pCrN[ nXPair ] ) + ( (long)pCrN[ nXPair + 1 ] ) ) >> 2;
312 : }
313 : }
314 : // Umwandlung von nL,nCb,nCr in nRed,nGreen,nBlue:
315 0 : nL *= 89024L;
316 0 : nCb -= 156;
317 0 : nCr -= 137;
318 0 : nRed = ( nL + nCr * 119374L + 0x8000 ) >> 16;
319 0 : if ( nRed < 0 )
320 0 : nRed = 0;
321 0 : if ( nRed > 255)
322 0 : nRed = 255;
323 0 : nGreen = ( nL - nCb * 28198L - nCr * 60761L + 0x8000 ) >> 16;
324 0 : if ( nGreen < 0 )
325 0 : nGreen = 0;
326 0 : if ( nGreen > 255 )
327 0 : nGreen = 255;
328 0 : nBlue = ( nL + nCb * 145352L + 0x8000 ) >> 16;
329 0 : if ( nBlue < 0 )
330 0 : nBlue = 0;
331 0 : if ( nBlue > 255 )
332 0 : nBlue = 255;
333 :
334 : // register color value in pBMPMap:
335 0 : if ( nOrientation < 2 )
336 : {
337 0 : if ( nOrientation == 0 )
338 0 : mpAcc->SetPixel( ny, nx, BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
339 : else
340 0 : mpAcc->SetPixel( nWidth - 1 - nx, ny, BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
341 : }
342 : else
343 : {
344 0 : if ( nOrientation == 2 )
345 0 : mpAcc->SetPixel( nHeight - 1 - ny, ( nWidth - 1 - nx ), BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
346 : else
347 0 : mpAcc->SetPixel( nx, ( nHeight - 1 - ny ), BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
348 : }
349 : }
350 : }
351 :
352 0 : if ( m_rPCD.GetError() )
353 0 : bStatus = sal_False;
354 0 : MayCallback( nMinPercent + ( nMaxPercent - nMinPercent ) * nYPair / nH2 );
355 0 : if ( bStatus == sal_False )
356 0 : break;
357 : }
358 0 : rtl_freeMemory((void*)pL0 );
359 0 : rtl_freeMemory((void*)pL1 );
360 0 : rtl_freeMemory((void*)pCb );
361 0 : rtl_freeMemory((void*)pCr );
362 0 : rtl_freeMemory((void*)pL0N);
363 0 : rtl_freeMemory((void*)pL1N);
364 0 : rtl_freeMemory((void*)pCbN);
365 0 : rtl_freeMemory((void*)pCrN);
366 : }
367 :
368 : //================== GraphicImport - the exported Function ================
369 :
370 : #ifdef DISABLE_DYNLOADING
371 : #define GraphicImport icdGraphicImport
372 : #endif
373 :
374 : extern "C" SAL_DLLPUBLIC_EXPORT sal_Bool SAL_CALL
375 0 : GraphicImport(SvStream & rStream, Graphic & rGraphic, FilterConfigItem* pConfigItem, sal_Bool)
376 : {
377 0 : PCDReader aPCDReader(rStream);
378 0 : return aPCDReader.ReadPCD(rGraphic, pConfigItem);
379 : }
380 :
381 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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