summaryrefslogtreecommitdiffstats
path: root/vcl/source/graphic/GraphicObject2.cxx
blob: 89af907e2b9d8930c4d3c6e0b3edac41a772e639 (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
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
503
/* -*- 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 <tools/gen.hxx>
#include <vcl/outdev.hxx>
#include <vcl/alpha.hxx>
#include <vcl/virdev.hxx>
#include <vcl/GraphicObject.hxx>
#include <memory>

struct ImplTileInfo
{
    ImplTileInfo() : nTilesEmptyX(0), nTilesEmptyY(0) {}

    Point aTileTopLeft;     // top, left position of the rendered tile
    Point aNextTileTopLeft; // top, left position for next recursion
                            // level's tile
    Size  aTileSizePixel;   // size of the generated tile (might
                            // differ from
                            // aNextTileTopLeft-aTileTopLeft, because
                            // this is nExponent*prevTileSize. The
                            // generated tile is always nExponent
                            // times the previous tile, such that it
                            // can be used in the next stage. The
                            // required area coverage is often
                            // less. The extraneous area covered is
                            // later overwritten by the next stage)
    int   nTilesEmptyX;     // number of original tiles empty right of
                            // this tile. This counts from
                            // aNextTileTopLeft, i.e. the additional
                            // area covered by aTileSizePixel is not
                            // considered here. This is for
                            // unification purposes, as the iterative
                            // calculation of the next level's empty
                            // tiles has to be based on this value.
    int   nTilesEmptyY;     // as above, for Y
};


bool GraphicObject::ImplRenderTempTile( VirtualDevice& rVDev,
                                        int nNumTilesX, int nNumTilesY,
                                        const Size& rTileSizePixel,
                                        const GraphicAttr* pAttr )
{
    // how many tiles to generate per recursion step
    const int nExponent = 2;

    // determine MSB factor
    int nMSBFactor( 1 );
    while( nNumTilesX / nMSBFactor != 0 ||
           nNumTilesY / nMSBFactor != 0 )
    {
        nMSBFactor *= nExponent;
    }

    // one less
    if(nMSBFactor > 1)
    {
        nMSBFactor /= nExponent;
    }
    ImplTileInfo aTileInfo;

    // #105229# Switch off mapping (converting to logic and back to
    // pixel might cause roundoff errors)
    bool bOldMap( rVDev.IsMapModeEnabled() );
    rVDev.EnableMapMode( false );

    bool bRet( ImplRenderTileRecursive( rVDev, nExponent, nMSBFactor, nNumTilesX, nNumTilesY,
                                        nNumTilesX, nNumTilesY, rTileSizePixel, pAttr, aTileInfo ) );

    rVDev.EnableMapMode( bOldMap );

    return bRet;
}

// define for debug drawings
//#define DBG_TEST

// see header comment. this works similar to base conversion of a
// number, i.e. if the exponent is 10, then the number for every tile
// size is given by the decimal place of the corresponding decimal
// representation.
bool GraphicObject::ImplRenderTileRecursive( VirtualDevice& rVDev, int nExponent, int nMSBFactor,
                                             int nNumOrigTilesX, int nNumOrigTilesY,
                                             int nRemainderTilesX, int nRemainderTilesY,
                                             const Size& rTileSizePixel, const GraphicAttr* pAttr,
                                             ImplTileInfo& rTileInfo )
{
    // gets loaded with our tile bitmap
    std::unique_ptr<GraphicObject> xTmpGraphic;
    GraphicObject* pTileGraphic;

    // stores a flag that renders the zero'th tile position
    // (i.e. (0,0)+rCurrPos) only if we're at the bottom of the
    // recursion stack. All other position already have that tile
    // rendered, because the lower levels painted their generated tile
    // there.
    bool bNoFirstTileDraw( false );

    // what's left when we're done with our tile size
    const int nNewRemainderX( nRemainderTilesX % nMSBFactor );
    const int nNewRemainderY( nRemainderTilesY % nMSBFactor );

    // gets filled out from the recursive call with info of what's
    // been generated
    ImplTileInfo aTileInfo;

    // check for recursion's end condition: LSB place reached?
    if( nMSBFactor == 1 )
    {
        pTileGraphic = this;

        // set initial tile size -> orig size
        aTileInfo.aTileSizePixel = rTileSizePixel;
        aTileInfo.nTilesEmptyX = nNumOrigTilesX;
        aTileInfo.nTilesEmptyY = nNumOrigTilesY;
    }
    else if( ImplRenderTileRecursive( rVDev, nExponent, nMSBFactor/nExponent,
                                      nNumOrigTilesX, nNumOrigTilesY,
                                      nNewRemainderX, nNewRemainderY,
                                      rTileSizePixel, pAttr, aTileInfo ) )
    {
        // extract generated tile -> see comment on the first loop below
        BitmapEx aTileBitmap( rVDev.GetBitmap( aTileInfo.aTileTopLeft, aTileInfo.aTileSizePixel ) );

        xTmpGraphic.reset(new GraphicObject(aTileBitmap));
        pTileGraphic = xTmpGraphic.get();

        // fill stripes left over from upstream levels:

        //  x0000
        //  0
        //  0
        //  0
        //  0

        // where x denotes the place filled by our recursive predecessors

        // check whether we have to fill stripes here. Although not
        // obvious, there is one case where we can skip this step: if
        // the previous recursion level (the one who filled our
        // aTileInfo) had zero area to fill, then there are no white
        // stripes left, naturally. This happens if the digit
        // associated to that level has a zero, and can be checked via
        // aTileTopLeft==aNextTileTopLeft.
        if( aTileInfo.aTileTopLeft != aTileInfo.aNextTileTopLeft )
        {
            // now fill one row from aTileInfo.aNextTileTopLeft.X() all
            // the way to the right
            // current output position while drawing
            Point aCurrPos(aTileInfo.aNextTileTopLeft.X(), aTileInfo.aTileTopLeft.Y());
            for (int nX=0; nX < aTileInfo.nTilesEmptyX; nX += nMSBFactor)
            {
                if (!pTileGraphic->Draw(rVDev, aCurrPos, aTileInfo.aTileSizePixel, pAttr))
                    return false;

                aCurrPos.AdjustX(aTileInfo.aTileSizePixel.Width() );
            }

#ifdef DBG_TEST
//          rVDev.SetFillCOL_WHITE );
            rVDev.SetFillColor();
            rVDev.SetLineColor( Color( 255 * nExponent / nMSBFactor, 255 - 255 * nExponent / nMSBFactor, 128 - 255 * nExponent / nMSBFactor ) );
            rVDev.DrawEllipse( tools::Rectangle(aTileInfo.aNextTileTopLeft.X(), aTileInfo.aTileTopLeft.Y(),
                                         aTileInfo.aNextTileTopLeft.X() - 1 + (aTileInfo.nTilesEmptyX/nMSBFactor)*aTileInfo.aTileSizePixel.Width(),
                                         aTileInfo.aTileTopLeft.Y() + aTileInfo.aTileSizePixel.Height() - 1) );
#endif

            // now fill one column from aTileInfo.aNextTileTopLeft.Y() all
            // the way to the bottom
            aCurrPos.setX( aTileInfo.aTileTopLeft.X() );
            aCurrPos.setY( aTileInfo.aNextTileTopLeft.Y() );
            for (int nY=0; nY < aTileInfo.nTilesEmptyY; nY += nMSBFactor)
            {
                if (!pTileGraphic->Draw(rVDev, aCurrPos, aTileInfo.aTileSizePixel, pAttr))
                    return false;

                aCurrPos.AdjustY(aTileInfo.aTileSizePixel.Height() );
            }

#ifdef DBG_TEST
            rVDev.DrawEllipse( tools::Rectangle(aTileInfo.aTileTopLeft.X(), aTileInfo.aNextTileTopLeft.Y(),
                                         aTileInfo.aTileTopLeft.X() + aTileInfo.aTileSizePixel.Width() - 1,
                                         aTileInfo.aNextTileTopLeft.Y() - 1 + (aTileInfo.nTilesEmptyY/nMSBFactor)*aTileInfo.aTileSizePixel.Height()) );
#endif
        }
        else
        {
            // Thought that aTileInfo.aNextTileTopLeft tile has always
            // been drawn already, but that's wrong: typically,
            // _parts_ of that tile have been drawn, since the
            // previous level generated the tile there. But when
            // aTileInfo.aNextTileTopLeft!=aTileInfo.aTileTopLeft, the
            // difference between these two values is missing in the
            // lower right corner of this first tile. So, can do that
            // only here.
            bNoFirstTileDraw = true;
        }
    }
    else
    {
        return false;
    }

    // calc number of original tiles in our drawing area without
    // remainder
    nRemainderTilesX -= nNewRemainderX;
    nRemainderTilesY -= nNewRemainderY;

    // fill tile info for calling method
    rTileInfo.aTileTopLeft     = aTileInfo.aNextTileTopLeft;
    rTileInfo.aNextTileTopLeft = Point( rTileInfo.aTileTopLeft.X() + rTileSizePixel.Width()*nRemainderTilesX,
                                        rTileInfo.aTileTopLeft.Y() + rTileSizePixel.Height()*nRemainderTilesY );
    rTileInfo.aTileSizePixel   = Size( rTileSizePixel.Width()*nMSBFactor*nExponent,
                                       rTileSizePixel.Height()*nMSBFactor*nExponent );
    rTileInfo.nTilesEmptyX     = aTileInfo.nTilesEmptyX - nRemainderTilesX;
    rTileInfo.nTilesEmptyY     = aTileInfo.nTilesEmptyY - nRemainderTilesY;

    // init output position
    Point aCurrPos = aTileInfo.aNextTileTopLeft;

    // fill our drawing area. Fill possibly more, to create the next
    // bigger tile size -> see bitmap extraction above. This does no
    // harm, since everything right or below our actual area is
    // overdrawn by our caller. Just in case we're in the last level,
    // we don't draw beyond the right or bottom border.
    for (int nY=0; nY < aTileInfo.nTilesEmptyY && nY < nExponent*nMSBFactor; nY += nMSBFactor)
    {
        aCurrPos.setX( aTileInfo.aNextTileTopLeft.X() );

        for (int nX=0; nX < aTileInfo.nTilesEmptyX && nX < nExponent*nMSBFactor; nX += nMSBFactor)
        {
            if( bNoFirstTileDraw )
                bNoFirstTileDraw = false; // don't draw first tile position
            else if (!pTileGraphic->Draw(rVDev, aCurrPos, aTileInfo.aTileSizePixel, pAttr))
                return false;

            aCurrPos.AdjustX(aTileInfo.aTileSizePixel.Width() );
        }

        aCurrPos.AdjustY(aTileInfo.aTileSizePixel.Height() );
    }

#ifdef DBG_TEST
//  rVDev.SetFillCOL_WHITE );
    rVDev.SetFillColor();
    rVDev.SetLineColor( Color( 255 * nExponent / nMSBFactor, 255 - 255 * nExponent / nMSBFactor, 128 - 255 * nExponent / nMSBFactor ) );
    rVDev.DrawRect( tools::Rectangle((rTileInfo.aTileTopLeft.X())*rTileSizePixel.Width(),
                              (rTileInfo.aTileTopLeft.Y())*rTileSizePixel.Height(),
                              (rTileInfo.aNextTileTopLeft.X())*rTileSizePixel.Width()-1,
                              (rTileInfo.aNextTileTopLeft.Y())*rTileSizePixel.Height()-1) );
#endif

    return true;
}

bool GraphicObject::ImplDrawTiled(OutputDevice& rOut, const tools::Rectangle& rArea, const Size& rSizePixel,
                                  const Size& rOffset, const GraphicAttr* pAttr, int nTileCacheSize1D)
{
    const MapMode   aOutMapMode(rOut.GetMapMode());
    const MapMode   aMapMode( aOutMapMode.GetMapUnit(), Point(), aOutMapMode.GetScaleX(), aOutMapMode.GetScaleY() );
    bool            bRet( false );

    // #i42643# Casting to Int64, to avoid integer overflow for
    // huge-DPI output devices
    if( GetGraphic().GetType() == GraphicType::Bitmap &&
        static_cast<sal_Int64>(rSizePixel.Width()) * rSizePixel.Height() <
        static_cast<sal_Int64>(nTileCacheSize1D)*nTileCacheSize1D )
    {
        // First combine very small bitmaps into a larger tile


        ScopedVclPtrInstance< VirtualDevice > aVDev;
        const int       nNumTilesInCacheX( (nTileCacheSize1D + rSizePixel.Width()-1) / rSizePixel.Width() );
        const int       nNumTilesInCacheY( (nTileCacheSize1D + rSizePixel.Height()-1) / rSizePixel.Height() );

        aVDev->SetOutputSizePixel( Size( nNumTilesInCacheX*rSizePixel.Width(),
                                        nNumTilesInCacheY*rSizePixel.Height() ) );
        aVDev->SetMapMode( aMapMode );

        // draw bitmap content
        if( ImplRenderTempTile( *aVDev, nNumTilesInCacheX,
                                nNumTilesInCacheY, rSizePixel, pAttr ) )
        {
            BitmapEx aTileBitmap( aVDev->GetBitmap( Point(0,0), aVDev->GetOutputSize() ) );

            // draw alpha content, if any
            if( IsTransparent() )
            {
                GraphicObject aAlphaGraphic;

                if( GetGraphic().IsAlpha() )
                    aAlphaGraphic.SetGraphic(BitmapEx(GetGraphic().GetBitmapEx().GetAlpha().GetBitmap()));
                else
                    aAlphaGraphic.SetGraphic(BitmapEx(Bitmap()));

                if( aAlphaGraphic.ImplRenderTempTile( *aVDev, nNumTilesInCacheX,
                                                      nNumTilesInCacheY, rSizePixel, pAttr ) )
                {
                    // Combine bitmap and alpha/mask
                    if( GetGraphic().IsAlpha() )
                        aTileBitmap = BitmapEx( aTileBitmap.GetBitmap(),
                                                AlphaMask( aVDev->GetBitmap( Point(0,0), aVDev->GetOutputSize() ) ) );
                    else
                        aTileBitmap = BitmapEx( aTileBitmap.GetBitmap(),
                                                aVDev->GetBitmap( Point(0,0), aVDev->GetOutputSize() ).CreateMask( COL_WHITE ) );
                }
            }

            // paint generated tile
            GraphicObject aTmpGraphic( aTileBitmap );
            bRet = aTmpGraphic.ImplDrawTiled(rOut, rArea,
                                             aTileBitmap.GetSizePixel(),
                                             rOffset, pAttr, nTileCacheSize1D);
        }
    }
    else
    {
        const Size      aOutOffset( rOut.LogicToPixel( rOffset, aOutMapMode ) );
        const tools::Rectangle aOutArea( rOut.LogicToPixel( rArea, aOutMapMode ) );

        // number of invisible (because out-of-area) tiles
        int nInvisibleTilesX;
        int nInvisibleTilesY;

        // round towards -infty for negative offset
        if( aOutOffset.Width() < 0 )
            nInvisibleTilesX = (aOutOffset.Width() - rSizePixel.Width() + 1) / rSizePixel.Width();
        else
            nInvisibleTilesX = aOutOffset.Width() / rSizePixel.Width();

        // round towards -infty for negative offset
        if( aOutOffset.Height() < 0 )
            nInvisibleTilesY = (aOutOffset.Height() - rSizePixel.Height() + 1) / rSizePixel.Height();
        else
            nInvisibleTilesY = aOutOffset.Height() / rSizePixel.Height();

        // origin from where to 'virtually' start drawing in pixel
        const Point aOutOrigin( rOut.LogicToPixel( Point( rArea.Left() - rOffset.Width(),
                                                           rArea.Top() - rOffset.Height() ) ) );
        // position in pixel from where to really start output
        const Point aOutStart( aOutOrigin.X() + nInvisibleTilesX*rSizePixel.Width(),
                               aOutOrigin.Y() + nInvisibleTilesY*rSizePixel.Height() );

        rOut.Push( vcl::PushFlags::CLIPREGION );
        rOut.IntersectClipRegion( rArea );

        // Paint all tiles


        bRet = ImplDrawTiled(rOut, aOutStart,
                             (aOutArea.GetWidth() + aOutArea.Left() - aOutStart.X() + rSizePixel.Width() - 1) / rSizePixel.Width(),
                             (aOutArea.GetHeight() + aOutArea.Top() - aOutStart.Y() + rSizePixel.Height() - 1) / rSizePixel.Height(),
                             rSizePixel, pAttr);

        rOut.Pop();
    }

    return bRet;
}

bool GraphicObject::ImplDrawTiled( OutputDevice& rOut, const Point& rPosPixel,
                                   int nNumTilesX, int nNumTilesY,
                                   const Size& rTileSizePixel, const GraphicAttr* pAttr ) const
{
    Point   aCurrPos( rPosPixel );
    Size    aTileSizeLogic( rOut.PixelToLogic( rTileSizePixel ) );
    int     nX, nY;

    // #107607# Use logical coordinates for metafile playing, too
    bool    bDrawInPixel( rOut.GetConnectMetaFile() == nullptr && GraphicType::Bitmap == GetType() );
    bool    bRet = false;

    // #105229# Switch off mapping (converting to logic and back to
    // pixel might cause roundoff errors)
    bool bOldMap( rOut.IsMapModeEnabled() );

    if( bDrawInPixel )
        rOut.EnableMapMode( false );

    for( nY=0; nY < nNumTilesY; ++nY )
    {
        aCurrPos.setX( rPosPixel.X() );

        for( nX=0; nX < nNumTilesX; ++nX )
        {
            // #105229# work with pixel coordinates here, mapping is disabled!
            // #104004# don't disable mapping for metafile recordings
            // #108412# don't quit the loop if one draw fails

            // update return value. This method should return true, if
            // at least one of the looped Draws succeeded.
            bRet |= Draw(rOut,
                         bDrawInPixel ? aCurrPos : rOut.PixelToLogic(aCurrPos),
                         bDrawInPixel ? rTileSizePixel : aTileSizeLogic,
                         pAttr);

            aCurrPos.AdjustX(rTileSizePixel.Width() );
        }

        aCurrPos.AdjustY(rTileSizePixel.Height() );
    }

    if( bDrawInPixel )
        rOut.EnableMapMode( bOldMap );

    return bRet;
}

void GraphicObject::ImplTransformBitmap( BitmapEx&          rBmpEx,
                                         const GraphicAttr& rAttr,
                                         const Size&        rCropLeftTop,
                                         const Size&        rCropRightBottom,
                                         const tools::Rectangle&   rCropRect,
                                         const Size&        rDstSize,
                                         bool               bEnlarge ) const
{
    // #107947# Extracted from svdograf.cxx

    // #104115# Crop the bitmap
    if( rAttr.IsCropped() )
    {
        rBmpEx.Crop( rCropRect );

        // #104115# Negative crop sizes mean: enlarge bitmap and pad
        if( bEnlarge && (
            rCropLeftTop.Width() < 0 ||
            rCropLeftTop.Height() < 0 ||
            rCropRightBottom.Width() < 0 ||
            rCropRightBottom.Height() < 0 ) )
        {
            Size aBmpSize( rBmpEx.GetSizePixel() );
            sal_Int32 nPadLeft( rCropLeftTop.Width() < 0 ? -rCropLeftTop.Width() : 0 );
            sal_Int32 nPadTop( rCropLeftTop.Height() < 0 ? -rCropLeftTop.Height() : 0 );
            sal_Int32 nPadTotalWidth( aBmpSize.Width() + nPadLeft + (rCropRightBottom.Width() < 0 ? -rCropRightBottom.Width() : 0) );
            sal_Int32 nPadTotalHeight( aBmpSize.Height() + nPadTop + (rCropRightBottom.Height() < 0 ? -rCropRightBottom.Height() : 0) );

            BitmapEx aBmpEx2;

            if( rBmpEx.IsAlpha() )
            {
                aBmpEx2 = BitmapEx( rBmpEx.GetBitmap(), rBmpEx.GetAlpha() );
            }
            else
            {
                // #104115# Generate mask bitmap and init to zero
                Bitmap aMask(aBmpSize, vcl::PixelFormat::N8_BPP, &Bitmap::GetGreyPalette(256));
                aMask.Erase( Color(0,0,0) );

                // #104115# Always generate transparent bitmap, we need the border transparent
                aBmpEx2 = BitmapEx( rBmpEx.GetBitmap(), aMask );

                // #104115# Add opaque mask to source bitmap, otherwise the destination remains transparent
                rBmpEx = aBmpEx2;
            }

            aBmpEx2.Scale(Size(nPadTotalWidth, nPadTotalHeight));
            aBmpEx2.Erase( Color(ColorAlpha,0,0,0,0) );
            aBmpEx2.CopyPixel( tools::Rectangle( Point(nPadLeft, nPadTop), aBmpSize ), tools::Rectangle( Point(0, 0), aBmpSize ), &rBmpEx );
            rBmpEx = aBmpEx2;
        }
    }

    const Size  aSizePixel( rBmpEx.GetSizePixel() );

    if( rAttr.GetRotation() == 0_deg10 || IsAnimated() )
        return;

    if( !(aSizePixel.Width() && aSizePixel.Height() && rDstSize.Width() && rDstSize.Height()) )
        return;

    double fSrcWH = static_cast<double>(aSizePixel.Width()) / aSizePixel.Height();
    double fDstWH = static_cast<double>(rDstSize.Width()) / rDstSize.Height();
    double fScaleX = 1.0, fScaleY = 1.0;

    // always choose scaling to shrink bitmap
    if( fSrcWH < fDstWH )
        fScaleY = aSizePixel.Width() / ( fDstWH * aSizePixel.Height() );
    else
        fScaleX = fDstWH * aSizePixel.Height() / aSizePixel.Width();

    rBmpEx.Scale( fScaleX, fScaleY );
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */