Line data Source code
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 CheckPCDImagePacFile();
70 : // checks whether it's a Photo-CD file with 'Image Pac'
71 :
72 : void ReadOrientation();
73 : // reads the orientation and sets nOrientation
74 :
75 : void ReadImage();
76 :
77 : public:
78 :
79 1 : PCDReader(SvStream &rStream)
80 : : bStatus(false)
81 : , nLastPercent(0)
82 : , m_rPCD(rStream)
83 : , mpAcc(NULL)
84 : , nOrientation(0)
85 : , eResolution(PCDRES_BASE16)
86 : , nWidth(0)
87 : , nHeight(0)
88 : , nImagePos(0)
89 : , nBMPWidth(0)
90 1 : , nBMPHeight(0)
91 : {
92 1 : }
93 :
94 : bool ReadPCD( Graphic & rGraphic, FilterConfigItem* pConfigItem );
95 : };
96 :
97 : //=================== Methods of PCDReader ==============================
98 :
99 1 : bool PCDReader::ReadPCD( Graphic & rGraphic, FilterConfigItem* pConfigItem )
100 : {
101 1 : Bitmap aBmp;
102 :
103 1 : bStatus = true;
104 1 : nLastPercent = 0;
105 :
106 : // is it a PCD file with a picture? ( sets bStatus == sal_False, if that's not the case):
107 1 : CheckPCDImagePacFile();
108 :
109 : // read orientation of the picture:
110 1 : ReadOrientation();
111 :
112 : // which resolution do we want?:
113 1 : eResolution = PCDRES_BASE;
114 1 : if ( pConfigItem )
115 : {
116 0 : sal_Int32 nResolution = pConfigItem->ReadInt32( "Resolution", 2 );
117 0 : if ( nResolution == 1 )
118 0 : eResolution = PCDRES_BASE4;
119 0 : else if ( nResolution == 0 )
120 0 : eResolution = PCDRES_BASE16;
121 : }
122 : // determine size and position (position within the PCD file) of the picture:
123 1 : switch (eResolution)
124 : {
125 : case PCDRES_BASE16 :
126 0 : nWidth = 192;
127 0 : nHeight = 128;
128 0 : nImagePos = 8192;
129 0 : break;
130 :
131 : case PCDRES_BASE4 :
132 0 : nWidth = 384;
133 0 : nHeight = 256;
134 0 : nImagePos = 47104;
135 0 : break;
136 :
137 : case PCDRES_BASE :
138 1 : nWidth = 768;
139 1 : nHeight = 512;
140 1 : nImagePos = 196608;
141 1 : break;
142 :
143 : default:
144 0 : bStatus = false;
145 : }
146 1 : if ( bStatus )
147 : {
148 1 : if ( ( nOrientation & 0x01 ) == 0 )
149 : {
150 1 : nBMPWidth = nWidth;
151 1 : nBMPHeight = nHeight;
152 : }
153 : else
154 : {
155 0 : nBMPWidth = nHeight;
156 0 : nBMPHeight = nWidth;
157 : }
158 1 : aBmp = Bitmap( Size( nBMPWidth, nBMPHeight ), 24 );
159 1 : if ( ( mpAcc = aBmp.AcquireWriteAccess() ) == 0 )
160 0 : return false;
161 :
162 1 : ReadImage();
163 :
164 1 : Bitmap::ReleaseAccess( mpAcc ), mpAcc = NULL;
165 1 : rGraphic = aBmp;
166 : }
167 1 : return bStatus;
168 : }
169 :
170 :
171 :
172 1 : void PCDReader::CheckPCDImagePacFile()
173 : {
174 : char Buf[ 8 ];
175 :
176 1 : m_rPCD.Seek( 2048 );
177 1 : m_rPCD.Read( Buf, 7 );
178 1 : Buf[ 7 ] = 0;
179 1 : if (OString(Buf) != "PCD_IPI")
180 0 : bStatus = false;
181 1 : }
182 :
183 :
184 :
185 1 : void PCDReader::ReadOrientation()
186 : {
187 1 : if ( !bStatus )
188 1 : return;
189 1 : m_rPCD.Seek( 194635 );
190 1 : m_rPCD.ReadUChar( nOrientation );
191 1 : nOrientation &= 0x03;
192 : }
193 :
194 :
195 :
196 1 : void PCDReader::ReadImage()
197 : {
198 : sal_uLong nx,ny,nW2,nH2,nYPair,ndy,nXPair;
199 : long nL,nCb,nCr,nRed,nGreen,nBlue;
200 : sal_uInt8 * pt;
201 : sal_uInt8 * pL0; // luminance for each pixel of the 1st row of the current pair of rows
202 : sal_uInt8 * pL1; // luminance for each pixel of the 2nd row of the current pair of rows
203 : sal_uInt8 * pCb; // blue chrominance for each 2x2 pixel of the current pair of rows
204 : sal_uInt8 * pCr; // red chrominance fuer je 2x2 pixel of the current pair of rows
205 : sal_uInt8 * pL0N, * pL1N, * pCbN, * pCrN; // like above, but for the next pair of rows
206 :
207 1 : if ( !bStatus )
208 0 : return;
209 :
210 1 : nW2=nWidth>>1;
211 1 : nH2=nHeight>>1;
212 :
213 1 : pL0 =static_cast<sal_uInt8*>(rtl_allocateMemory( nWidth ));
214 1 : pL1 =static_cast<sal_uInt8*>(rtl_allocateMemory( nWidth ));
215 1 : pCb =static_cast<sal_uInt8*>(rtl_allocateMemory( nW2+1 ));
216 1 : pCr =static_cast<sal_uInt8*>(rtl_allocateMemory( nW2+1 ));
217 1 : pL0N=static_cast<sal_uInt8*>(rtl_allocateMemory( nWidth ));
218 1 : pL1N=static_cast<sal_uInt8*>(rtl_allocateMemory( nWidth ));
219 1 : pCbN=static_cast<sal_uInt8*>(rtl_allocateMemory( nW2+1 ));
220 1 : pCrN=static_cast<sal_uInt8*>(rtl_allocateMemory( nW2+1 ));
221 :
222 1 : if ( pL0 == NULL || pL1 == NULL || pCb == NULL || pCr == NULL ||
223 1 : pL0N == NULL || pL1N == NULL || pCbN == NULL || pCrN == NULL)
224 : {
225 0 : rtl_freeMemory(static_cast<void*>(pL0) );
226 0 : rtl_freeMemory(static_cast<void*>(pL1) );
227 0 : rtl_freeMemory(static_cast<void*>(pCb) );
228 0 : rtl_freeMemory(static_cast<void*>(pCr) );
229 0 : rtl_freeMemory(static_cast<void*>(pL0N));
230 0 : rtl_freeMemory(static_cast<void*>(pL1N));
231 0 : rtl_freeMemory(static_cast<void*>(pCbN));
232 0 : rtl_freeMemory(static_cast<void*>(pCrN));
233 0 : bStatus = false;
234 0 : return;
235 : }
236 :
237 1 : m_rPCD.Seek( nImagePos );
238 :
239 : // next pair of rows := first pair of rows:
240 1 : m_rPCD.Read( pL0N, nWidth );
241 1 : m_rPCD.Read( pL1N, nWidth );
242 1 : m_rPCD.Read( pCbN, nW2 );
243 1 : m_rPCD.Read( pCrN, nW2 );
244 1 : pCbN[ nW2 ] = pCbN[ nW2 - 1 ];
245 1 : pCrN[ nW2 ] = pCrN[ nW2 - 1 ];
246 :
247 257 : for ( nYPair = 0; nYPair < nH2; nYPair++ )
248 : {
249 : // current pair of rows := next pair of rows:
250 256 : pt=pL0; pL0=pL0N; pL0N=pt;
251 256 : pt=pL1; pL1=pL1N; pL1N=pt;
252 256 : pt=pCb; pCb=pCbN; pCbN=pt;
253 256 : pt=pCr; pCr=pCrN; pCrN=pt;
254 :
255 : // get the next pair of rows:
256 256 : if ( nYPair < nH2 - 1 )
257 : {
258 255 : m_rPCD.Read( pL0N, nWidth );
259 255 : m_rPCD.Read( pL1N, nWidth );
260 255 : m_rPCD.Read( pCbN, nW2 );
261 255 : m_rPCD.Read( pCrN, nW2 );
262 255 : pCbN[nW2]=pCbN[ nW2 - 1 ];
263 255 : pCrN[nW2]=pCrN[ nW2 - 1 ];
264 : }
265 : else
266 : {
267 385 : for ( nXPair = 0; nXPair < nW2; nXPair++ )
268 : {
269 384 : pCbN[ nXPair ] = pCb[ nXPair ];
270 384 : pCrN[ nXPair ] = pCr[ nXPair ];
271 : }
272 : }
273 :
274 : // loop through both rows of the pair of rows:
275 768 : for ( ndy = 0; ndy < 2; ndy++ )
276 : {
277 512 : ny = ( nYPair << 1 ) + ndy;
278 :
279 : // loop through X:
280 393728 : for ( nx = 0; nx < nWidth; nx++ )
281 : {
282 : // get/calculate nL,nCb,nCr for the pixel nx,ny:
283 393216 : nXPair = nx >> 1;
284 393216 : if ( ndy == 0 )
285 : {
286 196608 : nL = (long)pL0[ nx ];
287 196608 : if (( nx & 1 ) == 0 )
288 : {
289 98304 : nCb = (long)pCb[ nXPair ];
290 98304 : nCr = (long)pCr[ nXPair ];
291 : }
292 : else
293 : {
294 98304 : nCb = ( ( (long)pCb[ nXPair ] ) + ( (long)pCb[ nXPair + 1 ] ) ) >> 1;
295 98304 : nCr = ( ( (long)pCr[ nXPair ] ) + ( (long)pCr[ nXPair + 1 ] ) ) >> 1;
296 : }
297 : }
298 : else {
299 196608 : nL = pL1[ nx ];
300 196608 : if ( ( nx & 1 ) == 0 )
301 : {
302 98304 : nCb = ( ( (long)pCb[ nXPair ] ) + ( (long)pCbN[ nXPair ] ) ) >> 1;
303 98304 : nCr = ( ( (long)pCr[ nXPair ] ) + ( (long)pCrN[ nXPair ] ) ) >> 1;
304 : }
305 : else
306 : {
307 196608 : nCb = ( ( (long)pCb[ nXPair ] ) + ( (long)pCb[ nXPair + 1 ] ) +
308 196608 : ( (long)pCbN[ nXPair ] ) + ( (long)pCbN[ nXPair + 1 ] ) ) >> 2;
309 196608 : nCr = ( ( (long)pCr[ nXPair ] ) + ( (long)pCr[ nXPair + 1] ) +
310 196608 : ( (long)pCrN[ nXPair ] ) + ( (long)pCrN[ nXPair + 1 ] ) ) >> 2;
311 : }
312 : }
313 : // conversion of nL,nCb,nCr in nRed,nGreen,nBlue:
314 393216 : nL *= 89024L;
315 393216 : nCb -= 156;
316 393216 : nCr -= 137;
317 393216 : nRed = ( nL + nCr * 119374L + 0x8000 ) >> 16;
318 393216 : if ( nRed < 0 )
319 7270 : nRed = 0;
320 393216 : if ( nRed > 255)
321 385939 : nRed = 255;
322 393216 : nGreen = ( nL - nCb * 28198L - nCr * 60761L + 0x8000 ) >> 16;
323 393216 : if ( nGreen < 0 )
324 1 : nGreen = 0;
325 393216 : if ( nGreen > 255 )
326 2428 : nGreen = 255;
327 393216 : nBlue = ( nL + nCb * 145352L + 0x8000 ) >> 16;
328 393216 : if ( nBlue < 0 )
329 7274 : nBlue = 0;
330 393216 : if ( nBlue > 255 )
331 385443 : nBlue = 255;
332 :
333 : // register color value in pBMPMap:
334 393216 : if ( nOrientation < 2 )
335 : {
336 393216 : if ( nOrientation == 0 )
337 393216 : mpAcc->SetPixel( ny, nx, BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
338 : else
339 0 : mpAcc->SetPixel( nWidth - 1 - nx, ny, BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
340 : }
341 : else
342 : {
343 0 : if ( nOrientation == 2 )
344 0 : mpAcc->SetPixel( nHeight - 1 - ny, ( nWidth - 1 - nx ), BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
345 : else
346 0 : mpAcc->SetPixel( nx, ( nHeight - 1 - ny ), BitmapColor( (sal_uInt8)nRed, (sal_uInt8)nGreen, (sal_uInt8)nBlue ) );
347 : }
348 : }
349 : }
350 :
351 256 : if ( m_rPCD.GetError() )
352 0 : bStatus = false;
353 256 : if ( !bStatus )
354 0 : break;
355 : }
356 1 : rtl_freeMemory(static_cast<void*>(pL0) );
357 1 : rtl_freeMemory(static_cast<void*>(pL1) );
358 1 : rtl_freeMemory(static_cast<void*>(pCb) );
359 1 : rtl_freeMemory(static_cast<void*>(pCr) );
360 1 : rtl_freeMemory(static_cast<void*>(pL0N));
361 1 : rtl_freeMemory(static_cast<void*>(pL1N));
362 1 : rtl_freeMemory(static_cast<void*>(pCbN));
363 1 : rtl_freeMemory(static_cast<void*>(pCrN));
364 : }
365 :
366 : //================== GraphicImport - the exported Function ================
367 :
368 : // this needs to be kept in sync with
369 : // ImpFilterLibCacheEntry::GetImportFunction() from
370 : // vcl/source/filter/graphicfilter.cxx
371 : #if defined(DISABLE_DYNLOADING)
372 : #define GraphicImport icdGraphicImport
373 : #endif
374 :
375 : extern "C" SAL_DLLPUBLIC_EXPORT bool SAL_CALL
376 1 : GraphicImport( SvStream & rStream, Graphic & rGraphic, FilterConfigItem* pConfigItem )
377 : {
378 1 : PCDReader aPCDReader(rStream);
379 1 : return aPCDReader.ReadPCD(rGraphic, pConfigItem);
380 3 : }
381 :
382 : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
