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apache / openoffice / bab44dcac0296df22024f3f10e7997de78ed4094 / . / AOO410 / main / vcl / source / gdi / bitmap3.cxx
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/**************************************************************
*
* 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
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_vcl.hxx"
#include <stdlib.h>
#include <vcl/bmpacc.hxx>
#include <vcl/octree.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/bitmap.hxx>
#include <impoct.hxx>
#include <impvect.hxx>
// -----------
// - Defines -
// -----------
#define RGB15( _def_cR, _def_cG, _def_cB ) (((sal_uLong)(_def_cR)<<10UL)|((sal_uLong)(_def_cG)<<5UL)|(sal_uLong)(_def_cB))
#define GAMMA( _def_cVal, _def_InvGamma ) ((sal_uInt8)MinMax(FRound(pow( _def_cVal/255.0,_def_InvGamma)*255.0),0L,255L))
#define MAP( cVal0, cVal1, nFrac ) ((sal_uInt8)((((long)(cVal0)<<7L)+nFrac*((long)(cVal1)-(cVal0)))>>7L))
#define CALC_ERRORS \
nTemp = p1T[nX++] >> 12; \
nBErr = MinMax( nTemp, 0, 255 ); \
nBErr = nBErr - FloydIndexMap[ nBC = FloydMap[nBErr] ]; \
nTemp = p1T[nX++] >> 12; \
nGErr = MinMax( nTemp, 0, 255 ); \
nGErr = nGErr - FloydIndexMap[ nGC = FloydMap[nGErr] ]; \
nTemp = p1T[nX] >> 12; \
nRErr = MinMax( nTemp, 0, 255 ); \
nRErr = nRErr - FloydIndexMap[ nRC = FloydMap[nRErr] ];
#define CALC_TABLES3 \
p2T[nX++] += FloydError3[nBErr]; \
p2T[nX++] += FloydError3[nGErr]; \
p2T[nX++] += FloydError3[nRErr];
#define CALC_TABLES5 \
p2T[nX++] += FloydError5[nBErr]; \
p2T[nX++] += FloydError5[nGErr]; \
p2T[nX++] += FloydError5[nRErr];
#define CALC_TABLES7 \
p1T[++nX] += FloydError7[nBErr]; \
p2T[nX++] += FloydError1[nBErr]; \
p1T[nX] += FloydError7[nGErr]; \
p2T[nX++] += FloydError1[nGErr]; \
p1T[nX] += FloydError7[nRErr]; \
p2T[nX] += FloydError1[nRErr];
// -----------
// - Statics -
// -----------
sal_uLong nVCLRLut[ 6 ] = { 16, 17, 18, 19, 20, 21 };
sal_uLong nVCLGLut[ 6 ] = { 0, 6, 12, 18, 24, 30 };
sal_uLong nVCLBLut[ 6 ] = { 0, 36, 72, 108, 144, 180 };
// ------------------------------------------------------------------------
sal_uLong nVCLDitherLut[ 256 ] =
{
0, 49152, 12288, 61440, 3072, 52224, 15360, 64512, 768, 49920, 13056,
62208, 3840, 52992, 16128, 65280, 32768, 16384, 45056, 28672, 35840, 19456,
48128, 31744, 33536, 17152, 45824, 29440, 36608, 20224, 48896, 32512, 8192,
57344, 4096, 53248, 11264, 60416, 7168, 56320, 8960, 58112, 4864, 54016,
12032, 61184, 7936, 57088, 40960, 24576, 36864, 20480, 44032, 27648, 39936,
23552, 41728, 25344, 37632, 21248, 44800, 28416, 40704, 24320, 2048, 51200,
14336, 63488, 1024, 50176, 13312, 62464, 2816, 51968, 15104, 64256, 1792,
50944, 14080, 63232, 34816, 18432, 47104, 30720, 33792, 17408, 46080, 29696,
35584, 19200, 47872, 31488, 34560, 18176, 46848, 30464, 10240, 59392, 6144,
55296, 9216, 58368, 5120, 54272, 11008, 60160, 6912, 56064, 9984, 59136,
5888, 55040, 43008, 26624, 38912, 22528, 41984, 25600, 37888, 21504, 43776,
27392, 39680, 23296, 42752, 26368, 38656, 22272, 512, 49664, 12800, 61952,
3584, 52736, 15872, 65024, 256, 49408, 12544, 61696, 3328, 52480, 15616,
64768, 33280, 16896, 45568, 29184, 36352, 19968, 48640, 32256, 33024, 16640,
45312, 28928, 36096, 19712, 48384, 32000, 8704, 57856, 4608, 53760, 11776,
60928, 7680, 56832, 8448, 57600, 4352, 53504, 11520, 60672, 7424, 56576,
41472, 25088, 37376, 20992, 44544, 28160, 40448, 24064, 41216, 24832, 37120,
20736, 44288, 27904, 40192, 23808, 2560, 51712, 14848, 64000, 1536, 50688,
13824, 62976, 2304, 51456, 14592, 63744, 1280, 50432, 13568, 62720, 35328,
18944, 47616, 31232, 34304, 17920, 46592, 30208, 35072, 18688, 47360, 30976,
34048, 17664, 46336, 29952, 10752, 59904, 6656, 55808, 9728, 58880, 5632,
54784, 10496, 59648, 6400, 55552, 9472, 58624, 5376, 54528, 43520, 27136,
39424, 23040, 42496, 26112, 38400, 22016, 43264, 26880, 39168, 22784, 42240,
25856, 38144, 21760
};
// ------------------------------------------------------------------------
sal_uLong nVCLLut[ 256 ] =
{
0, 1286, 2572, 3858, 5144, 6430, 7716, 9002,
10288, 11574, 12860, 14146, 15432, 16718, 18004, 19290,
20576, 21862, 23148, 24434, 25720, 27006, 28292, 29578,
30864, 32150, 33436, 34722, 36008, 37294, 38580, 39866,
41152, 42438, 43724, 45010, 46296, 47582, 48868, 50154,
51440, 52726, 54012, 55298, 56584, 57870, 59156, 60442,
61728, 63014, 64300, 65586, 66872, 68158, 69444, 70730,
72016, 73302, 74588, 75874, 77160, 78446, 79732, 81018,
82304, 83590, 84876, 86162, 87448, 88734, 90020, 91306,
92592, 93878, 95164, 96450, 97736, 99022,100308,101594,
102880,104166,105452,106738,108024,109310,110596,111882,
113168,114454,115740,117026,118312,119598,120884,122170,
123456,124742,126028,127314,128600,129886,131172,132458,
133744,135030,136316,137602,138888,140174,141460,142746,
144032,145318,146604,147890,149176,150462,151748,153034,
154320,155606,156892,158178,159464,160750,162036,163322,
164608,165894,167180,168466,169752,171038,172324,173610,
174896,176182,177468,178754,180040,181326,182612,183898,
185184,186470,187756,189042,190328,191614,192900,194186,
195472,196758,198044,199330,200616,201902,203188,204474,
205760,207046,208332,209618,210904,212190,213476,214762,
216048,217334,218620,219906,221192,222478,223764,225050,
226336,227622,228908,230194,231480,232766,234052,235338,
236624,237910,239196,240482,241768,243054,244340,245626,
246912,248198,249484,250770,252056,253342,254628,255914,
257200,258486,259772,261058,262344,263630,264916,266202,
267488,268774,270060,271346,272632,273918,275204,276490,
277776,279062,280348,281634,282920,284206,285492,286778,
288064,289350,290636,291922,293208,294494,295780,297066,
298352,299638,300924,302210,303496,304782,306068,307354,
308640,309926,311212,312498,313784,315070,316356,317642,
318928,320214,321500,322786,324072,325358,326644,327930
};
// ------------------------------------------------------------------------
long FloydMap[256] =
{
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
};
// ------------------------------------------------------------------------
long FloydError1[61] =
{
-7680, -7424, -7168, -6912, -6656, -6400, -6144,
-5888, -5632, -5376, -5120, -4864, -4608, -4352,
-4096, -3840, -3584, -3328, -3072, -2816, -2560,
-2304, -2048, -1792, -1536, -1280, -1024, -768,
-512, -256, 0, 256, 512, 768, 1024, 1280, 1536,
1792, 2048, 2304, 2560, 2816, 3072, 3328, 3584,
3840, 4096, 4352, 4608, 4864, 5120, 5376, 5632,
5888, 6144, 6400, 6656, 6912, 7168, 7424, 7680
};
// ------------------------------------------------------------------------
long FloydError3[61] =
{
-23040, -22272, -21504, -20736, -19968, -19200,
-18432, -17664, -16896, -16128, -15360, -14592,
-13824, -13056, -12288, -11520, -10752, -9984,
-9216, -8448, -7680, -6912, -6144, -5376, -4608,
-3840, -3072, -2304, -1536, -768, 0, 768, 1536,
2304, 3072, 3840, 4608, 5376, 6144, 6912, 7680,
8448, 9216, 9984, 10752, 11520, 12288, 13056,
13824, 14592, 15360, 16128, 16896, 17664, 18432,
19200, 19968, 20736, 21504, 22272, 23040
};
// ------------------------------------------------------------------------
long FloydError5[61] =
{
-38400, -37120, -35840, -34560, -33280, -32000,
-30720, -29440, -28160, -26880, -25600, -24320,
-23040, -21760, -20480, -19200, -17920, -16640,
-15360, -14080, -12800, -11520, -10240, -8960,
-7680, -6400, -5120, -3840, -2560, -1280, 0,
1280, 2560, 3840, 5120, 6400, 7680, 8960, 10240,
11520, 12800, 14080, 15360, 16640, 17920, 19200,
20480, 21760, 23040, 24320, 25600, 26880, 28160,
29440, 30720, 32000, 33280, 34560, 35840, 37120,
38400
};
// ------------------------------------------------------------------------
long FloydError7[61] =
{
-53760, -51968, -50176, -48384, -46592, -44800,
-43008, -41216, -39424, -37632, -35840, -34048,
-32256, -30464, -28672, -26880, -25088, -23296,
-21504, -19712, -17920, -16128, -14336, -12544,
-10752, -8960, -7168, -5376, -3584, -1792, 0,
1792, 3584, 5376, 7168, 8960, 10752, 12544, 14336,
16128, 17920, 19712, 21504, 23296, 25088, 26880,
28672, 30464, 32256, 34048, 35840, 37632, 39424,
41216, 43008, 44800, 46592, 48384, 50176, 51968,
53760
};
// ------------------------------------------------------------------------
long FloydIndexMap[6] =
{
-30, 21, 72, 123, 174, 225
};
// --------------------------
// - ImplCreateDitherMatrix -
// --------------------------
void ImplCreateDitherMatrix( sal_uInt8 (*pDitherMatrix)[16][16] )
{
double fVal = 3.125;
const double fVal16 = fVal / 16.;
long i, j, k, l;
sal_uInt16 pMtx[ 16 ][ 16 ];
sal_uInt16 nMax = 0;
static sal_uInt8 pMagic[4][4] = { { 0, 14, 3, 13, },
{11, 5, 8, 6, },
{12, 2, 15, 1, },
{7, 9, 4, 10 } };
// MagicSquare aufbauen
for ( i = 0; i < 4; i++ )
for ( j = 0; j < 4; j++ )
for ( k = 0; k < 4; k++ )
for ( l = 0; l < 4; l++ )
nMax = Max ( pMtx[ (k<<2) + i][(l<<2 ) + j] =
(sal_uInt16) ( 0.5 + pMagic[i][j]*fVal + pMagic[k][l]*fVal16 ), nMax );
// auf Intervall [0;254] skalieren
for ( i = 0, fVal = 254. / nMax; i < 16; i++ )
for( j = 0; j < 16; j++ )
(*pDitherMatrix)[i][j] = (sal_uInt8) ( fVal * pMtx[i][j] );
}
// ----------
// - Bitmap -
// ----------
sal_Bool Bitmap::Convert( BmpConversion eConversion )
{
const sal_uInt16 nBitCount = GetBitCount();
sal_Bool bRet = sal_False;
switch( eConversion )
{
case( BMP_CONVERSION_1BIT_THRESHOLD ):
bRet = ImplMakeMono( 128 );
break;
case( BMP_CONVERSION_1BIT_MATRIX ):
bRet = ImplMakeMonoDither();
break;
case( BMP_CONVERSION_4BIT_GREYS ):
bRet = ImplMakeGreyscales( 16 );
break;
case( BMP_CONVERSION_4BIT_COLORS ):
{
if( nBitCount < 4 )
bRet = ImplConvertUp( 4, NULL );
else if( nBitCount > 4 )
bRet = ImplConvertDown( 4, NULL );
else
bRet = sal_True;
}
break;
case( BMP_CONVERSION_4BIT_TRANS ):
{
Color aTrans( BMP_COL_TRANS );
if( nBitCount < 4 )
bRet = ImplConvertUp( 4, &aTrans );
else
bRet = ImplConvertDown( 4, &aTrans );
}
break;
case( BMP_CONVERSION_8BIT_GREYS ):
bRet = ImplMakeGreyscales( 256 );
break;
case( BMP_CONVERSION_8BIT_COLORS ):
{
if( nBitCount < 8 )
bRet = ImplConvertUp( 8 );
else if( nBitCount > 8 )
bRet = ImplConvertDown( 8 );
else
bRet = sal_True;
}
break;
case( BMP_CONVERSION_8BIT_TRANS ):
{
Color aTrans( BMP_COL_TRANS );
if( nBitCount < 8 )
bRet = ImplConvertUp( 8, &aTrans );
else
bRet = ImplConvertDown( 8, &aTrans );
}
break;
case( BMP_CONVERSION_24BIT ):
{
if( nBitCount < 24 )
bRet = ImplConvertUp( 24, NULL );
else
bRet = sal_True;
}
break;
case( BMP_CONVERSION_GHOSTED ):
bRet = ImplConvertGhosted();
break;
default:
DBG_ERROR( "Bitmap::Convert(): Unsupported conversion" );
break;
}
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplMakeMono( sal_uInt8 cThreshold )
{
BitmapReadAccess* pReadAcc = AcquireReadAccess();
sal_Bool bRet = sal_False;
if( pReadAcc )
{
Bitmap aNewBmp( GetSizePixel(), 1 );
BitmapWriteAccess* pWriteAcc = aNewBmp.AcquireWriteAccess();
if( pWriteAcc )
{
const BitmapColor aBlack( pWriteAcc->GetBestMatchingColor( Color( COL_BLACK ) ) );
const BitmapColor aWhite( pWriteAcc->GetBestMatchingColor( Color( COL_WHITE ) ) );
const long nWidth = pWriteAcc->Width();
const long nHeight = pWriteAcc->Height();
if( pReadAcc->HasPalette() )
{
for( long nY = 0L; nY < nHeight; nY++ )
{
for( long nX = 0L; nX < nWidth; nX++ )
{
const sal_uInt8 cIndex = pReadAcc->GetPixelIndex( nY, nX );
if( pReadAcc->GetPaletteColor( cIndex ).GetLuminance() >=
cThreshold )
{
pWriteAcc->SetPixel( nY, nX, aWhite );
}
else
pWriteAcc->SetPixel( nY, nX, aBlack );
}
}
}
else
{
for( long nY = 0L; nY < nHeight; nY++ )
{
for( long nX = 0L; nX < nWidth; nX++ )
{
if( pReadAcc->GetPixel( nY, nX ).GetLuminance() >=
cThreshold )
{
pWriteAcc->SetPixel( nY, nX, aWhite );
}
else
pWriteAcc->SetPixel( nY, nX, aBlack );
}
}
}
aNewBmp.ReleaseAccess( pWriteAcc );
bRet = sal_True;
}
ReleaseAccess( pReadAcc );
if( bRet )
{
const MapMode aMap( maPrefMapMode );
const Size aSize( maPrefSize );
*this = aNewBmp;
maPrefMapMode = aMap;
maPrefSize = aSize;
}
}
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplMakeMonoDither()
{
BitmapReadAccess* pReadAcc = AcquireReadAccess();
sal_Bool bRet = sal_False;
if( pReadAcc )
{
Bitmap aNewBmp( GetSizePixel(), 1 );
BitmapWriteAccess* pWriteAcc = aNewBmp.AcquireWriteAccess();
if( pWriteAcc )
{
const BitmapColor aBlack( pWriteAcc->GetBestMatchingColor( Color( COL_BLACK ) ) );
const BitmapColor aWhite( pWriteAcc->GetBestMatchingColor( Color( COL_WHITE ) ) );
const long nWidth = pWriteAcc->Width();
const long nHeight = pWriteAcc->Height();
sal_uInt8 pDitherMatrix[ 16 ][ 16 ];
ImplCreateDitherMatrix( &pDitherMatrix );
if( pReadAcc->HasPalette() )
{
for( long nY = 0L; nY < nHeight; nY++ )
{
for( long nX = 0L, nModY = nY % 16; nX < nWidth; nX++ )
{
const sal_uInt8 cIndex = pReadAcc->GetPixelIndex( nY, nX );
if( pReadAcc->GetPaletteColor( cIndex ).GetLuminance() >
pDitherMatrix[ nModY ][ nX % 16 ] )
{
pWriteAcc->SetPixel( nY, nX, aWhite );
}
else
pWriteAcc->SetPixel( nY, nX, aBlack );
}
}
}
else
{
for( long nY = 0L; nY < nHeight; nY++ )
{
for( long nX = 0L, nModY = nY % 16; nX < nWidth; nX++ )
{
if( pReadAcc->GetPixel( nY, nX ).GetLuminance() >
pDitherMatrix[ nModY ][ nX % 16 ] )
{
pWriteAcc->SetPixel( nY, nX, aWhite );
}
else
pWriteAcc->SetPixel( nY, nX, aBlack );
}
}
}
aNewBmp.ReleaseAccess( pWriteAcc );
bRet = sal_True;
}
ReleaseAccess( pReadAcc );
if( bRet )
{
const MapMode aMap( maPrefMapMode );
const Size aSize( maPrefSize );
*this = aNewBmp;
maPrefMapMode = aMap;
maPrefSize = aSize;
}
}
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplMakeGreyscales( sal_uInt16 nGreys )
{
DBG_ASSERT( nGreys == 16 || nGreys == 256, "Only 16 or 256 greyscales are supported!" );
BitmapReadAccess* pReadAcc = AcquireReadAccess();
sal_Bool bRet = sal_False;
if( pReadAcc )
{
const BitmapPalette& rPal = GetGreyPalette( nGreys );
sal_uLong nShift = ( ( nGreys == 16 ) ? 4UL : 0UL );
sal_Bool bPalDiffers = !pReadAcc->HasPalette() || ( rPal.GetEntryCount() != pReadAcc->GetPaletteEntryCount() );
if( !bPalDiffers )
bPalDiffers = ( (BitmapPalette&) rPal != pReadAcc->GetPalette() );
if( bPalDiffers )
{
Bitmap aNewBmp( GetSizePixel(), ( nGreys == 16 ) ? 4 : 8, &rPal );
BitmapWriteAccess* pWriteAcc = aNewBmp.AcquireWriteAccess();
if( pWriteAcc )
{
const long nWidth = pWriteAcc->Width();
const long nHeight = pWriteAcc->Height();
if( pReadAcc->HasPalette() )
{
for( long nY = 0L; nY < nHeight; nY++ )
{
for( long nX = 0L; nX < nWidth; nX++ )
{
const sal_uInt8 cIndex = pReadAcc->GetPixelIndex( nY, nX );
pWriteAcc->SetPixelIndex( nY, nX,
(pReadAcc->GetPaletteColor( cIndex ).GetLuminance() >> nShift) );
}
}
}
else if( pReadAcc->GetScanlineFormat() == BMP_FORMAT_24BIT_TC_BGR &&
pWriteAcc->GetScanlineFormat() == BMP_FORMAT_8BIT_PAL )
{
nShift += 8;
for( long nY = 0L; nY < nHeight; nY++ )
{
Scanline pReadScan = pReadAcc->GetScanline( nY );
Scanline pWriteScan = pWriteAcc->GetScanline( nY );
for( long nX = 0L; nX < nWidth; nX++ )
{
const sal_uLong nB = *pReadScan++;
const sal_uLong nG = *pReadScan++;
const sal_uLong nR = *pReadScan++;
*pWriteScan++ = (sal_uInt8) ( ( nB * 28UL + nG * 151UL + nR * 77UL ) >> nShift );
}
}
}
else if( pReadAcc->GetScanlineFormat() == BMP_FORMAT_24BIT_TC_RGB &&
pWriteAcc->GetScanlineFormat() == BMP_FORMAT_8BIT_PAL )
{
nShift += 8;
for( long nY = 0L; nY < nHeight; nY++ )
{
Scanline pReadScan = pReadAcc->GetScanline( nY );
Scanline pWriteScan = pWriteAcc->GetScanline( nY );
for( long nX = 0L; nX < nWidth; nX++ )
{
const sal_uLong nR = *pReadScan++;
const sal_uLong nG = *pReadScan++;
const sal_uLong nB = *pReadScan++;
*pWriteScan++ = (sal_uInt8) ( ( nB * 28UL + nG * 151UL + nR * 77UL ) >> nShift );
}
}
}
else
{
for( long nY = 0L; nY < nHeight; nY++ )
for( long nX = 0L; nX < nWidth; nX++ )
pWriteAcc->SetPixelIndex( nY, nX, (pReadAcc->GetPixel( nY, nX ) ).GetLuminance() >> nShift );
}
aNewBmp.ReleaseAccess( pWriteAcc );
bRet = sal_True;
}
ReleaseAccess( pReadAcc );
if( bRet )
{
const MapMode aMap( maPrefMapMode );
const Size aSize( maPrefSize );
*this = aNewBmp;
maPrefMapMode = aMap;
maPrefSize = aSize;
}
}
else
{
ReleaseAccess( pReadAcc );
bRet = sal_True;
}
}
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplConvertUp( sal_uInt16 nBitCount, Color* pExtColor )
{
DBG_ASSERT( nBitCount > GetBitCount(), "New BitCount must be greater!" );
BitmapReadAccess* pReadAcc = AcquireReadAccess();
sal_Bool bRet = sal_False;
if( pReadAcc )
{
BitmapPalette aPal;
Bitmap aNewBmp( GetSizePixel(), nBitCount, pReadAcc->HasPalette() ? &pReadAcc->GetPalette() : &aPal );
BitmapWriteAccess* pWriteAcc = aNewBmp.AcquireWriteAccess();
if( pWriteAcc )
{
const long nWidth = pWriteAcc->Width();
const long nHeight = pWriteAcc->Height();
if( pWriteAcc->HasPalette() )
{
const sal_uInt16 nOldCount = 1 << GetBitCount();
const BitmapPalette& rOldPal = pReadAcc->GetPalette();
aPal.SetEntryCount( 1 << nBitCount );
for( sal_uInt16 i = 0; i < nOldCount; i++ )
aPal[ i ] = rOldPal[ i ];
if( pExtColor )
aPal[ aPal.GetEntryCount() - 1 ] = *pExtColor;
pWriteAcc->SetPalette( aPal );
for( long nY = 0L; nY < nHeight; nY++ )
for( long nX = 0L; nX < nWidth; nX++ )
pWriteAcc->SetPixel( nY, nX, pReadAcc->GetPixel( nY, nX ) );
}
else
{
if( pReadAcc->HasPalette() )
{
for( long nY = 0L; nY < nHeight; nY++ )
for( long nX = 0L; nX < nWidth; nX++ )
pWriteAcc->SetPixel( nY, nX, pReadAcc->GetPaletteColor( pReadAcc->GetPixelIndex( nY, nX ) ) );
}
else
{
for( long nY = 0L; nY < nHeight; nY++ )
for( long nX = 0L; nX < nWidth; nX++ )
pWriteAcc->SetPixel( nY, nX, pReadAcc->GetPixel( nY, nX ) );
}
}
aNewBmp.ReleaseAccess( pWriteAcc );
bRet = sal_True;
}
ReleaseAccess( pReadAcc );
if( bRet )
{
const MapMode aMap( maPrefMapMode );
const Size aSize( maPrefSize );
*this = aNewBmp;
maPrefMapMode = aMap;
maPrefSize = aSize;
}
}
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplConvertDown( sal_uInt16 nBitCount, Color* pExtColor )
{
DBG_ASSERT( nBitCount <= GetBitCount(), "New BitCount must be lower ( or equal when pExtColor is set )!" );
BitmapReadAccess* pReadAcc = AcquireReadAccess();
sal_Bool bRet = sal_False;
if( pReadAcc )
{
BitmapPalette aPal;
Bitmap aNewBmp( GetSizePixel(), nBitCount, &aPal );
BitmapWriteAccess* pWriteAcc = aNewBmp.AcquireWriteAccess();
if( pWriteAcc )
{
const sal_uInt16 nCount = 1 << nBitCount;
const long nWidth = pWriteAcc->Width();
const long nWidth1 = nWidth - 1L;
const long nHeight = pWriteAcc->Height();
Octree aOctree( *pReadAcc, pExtColor ? ( nCount - 1 ) : nCount );
InverseColorMap aColorMap( aPal = aOctree.GetPalette() );
BitmapColor aColor;
ImpErrorQuad aErrQuad;
ImpErrorQuad* pErrQuad1 = new ImpErrorQuad[ nWidth ];
ImpErrorQuad* pErrQuad2 = new ImpErrorQuad[ nWidth ];
ImpErrorQuad* pQLine1 = pErrQuad1;
ImpErrorQuad* pQLine2 = 0;
long nX, nY;
long nYTmp = 0L;
sal_uInt8 cIndex;
sal_Bool bQ1 = sal_True;
if( pExtColor )
{
aPal.SetEntryCount( aPal.GetEntryCount() + 1 );
aPal[ aPal.GetEntryCount() - 1 ] = *pExtColor;
}
// set Black/White always, if we have enough space
if( aPal.GetEntryCount() < ( nCount - 1 ) )
{
aPal.SetEntryCount( aPal.GetEntryCount() + 2 );
aPal[ aPal.GetEntryCount() - 2 ] = Color( COL_BLACK );
aPal[ aPal.GetEntryCount() - 1 ] = Color( COL_WHITE );
}
pWriteAcc->SetPalette( aPal );
for( nY = 0L; nY < Min( nHeight, 2L ); nY++, nYTmp++ )
{
for( nX = 0L, pQLine2 = !nY ? pErrQuad1 : pErrQuad2; nX < nWidth; nX++ )
{
if( pReadAcc->HasPalette() )
pQLine2[ nX ] = pReadAcc->GetPaletteColor( pReadAcc->GetPixelIndex( nYTmp, nX ) );
else
pQLine2[ nX ] = pReadAcc->GetPixel( nYTmp, nX );
}
}
for( nY = 0L; nY < nHeight; nY++, nYTmp++ )
{
// first pixel in the line
cIndex = (sal_uInt8) aColorMap.GetBestPaletteIndex( pQLine1[ 0 ].ImplGetColor() );
pWriteAcc->SetPixelIndex( nY, 0, cIndex );
for( nX = 1L; nX < nWidth1; nX++ )
{
cIndex = (sal_uInt8) aColorMap.GetBestPaletteIndex( aColor = pQLine1[ nX ].ImplGetColor() );
aErrQuad = ( ImpErrorQuad( aColor ) -= pWriteAcc->GetPaletteColor( cIndex ) );
pQLine1[ ++nX ].ImplAddColorError7( aErrQuad );
pQLine2[ nX-- ].ImplAddColorError1( aErrQuad );
pQLine2[ nX-- ].ImplAddColorError5( aErrQuad );
pQLine2[ nX++ ].ImplAddColorError3( aErrQuad );
pWriteAcc->SetPixelIndex( nY, nX, cIndex );
}
// letztes ZeilenPixel
if( nX < nWidth )
{
cIndex = (sal_uInt8) aColorMap.GetBestPaletteIndex( pQLine1[ nWidth1 ].ImplGetColor() );
pWriteAcc->SetPixelIndex( nY, nX, cIndex );
}
// Zeilenpuffer neu fuellen/kopieren
pQLine1 = pQLine2;
pQLine2 = ( bQ1 = !bQ1 ) != sal_False ? pErrQuad2 : pErrQuad1;
if( nYTmp < nHeight )
{
for( nX = 0L; nX < nWidth; nX++ )
{
if( pReadAcc->HasPalette() )
pQLine2[ nX ] = pReadAcc->GetPaletteColor( pReadAcc->GetPixelIndex( nYTmp, nX ) );
else
pQLine2[ nX ] = pReadAcc->GetPixel( nYTmp, nX );
}
}
}
// Zeilenpuffer zerstoeren
delete[] pErrQuad1;
delete[] pErrQuad2;
aNewBmp.ReleaseAccess( pWriteAcc );
bRet = sal_True;
}
ReleaseAccess( pReadAcc );
if( bRet )
{
const MapMode aMap( maPrefMapMode );
const Size aSize( maPrefSize );
*this = aNewBmp;
maPrefMapMode = aMap;
maPrefSize = aSize;
}
}
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplConvertGhosted()
{
Bitmap aNewBmp;
BitmapReadAccess* pR = AcquireReadAccess();
sal_Bool bRet = sal_False;
if( pR )
{
if( pR->HasPalette() )
{
BitmapPalette aNewPal( pR->GetPaletteEntryCount() );
for( long i = 0, nCount = aNewPal.GetEntryCount(); i < nCount; i++ )
{
const BitmapColor& rOld = pR->GetPaletteColor( (sal_uInt16) i );
aNewPal[ (sal_uInt16) i ] = BitmapColor( ( rOld.GetRed() >> 1 ) | 0x80,
( rOld.GetGreen() >> 1 ) | 0x80,
( rOld.GetBlue() >> 1 ) | 0x80 );
}
aNewBmp = Bitmap( GetSizePixel(), GetBitCount(), &aNewPal );
BitmapWriteAccess* pW = aNewBmp.AcquireWriteAccess();
if( pW )
{
pW->CopyBuffer( *pR );
aNewBmp.ReleaseAccess( pW );
bRet = sal_True;
}
}
else
{
aNewBmp = Bitmap( GetSizePixel(), 24 );
BitmapWriteAccess* pW = aNewBmp.AcquireWriteAccess();
if( pW )
{
const long nWidth = pR->Width(), nHeight = pR->Height();
for( long nY = 0; nY < nHeight; nY++ )
{
for( long nX = 0; nX < nWidth; nX++ )
{
const BitmapColor aOld( pR->GetPixel( nY, nX ) );
pW->SetPixel( nY, nX, BitmapColor( ( aOld.GetRed() >> 1 ) | 0x80,
( aOld.GetGreen() >> 1 ) | 0x80,
( aOld.GetBlue() >> 1 ) | 0x80 ) );
}
}
aNewBmp.ReleaseAccess( pW );
bRet = sal_True;
}
}
ReleaseAccess( pR );
}
if( bRet )
{
const MapMode aMap( maPrefMapMode );
const Size aSize( maPrefSize );
*this = aNewBmp;
maPrefMapMode = aMap;
maPrefSize = aSize;
}
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::Scale( const double& rScaleX, const double& rScaleY, sal_uInt32 nScaleFlag )
{
if(basegfx::fTools::equalZero(rScaleX) || basegfx::fTools::equalZero(rScaleY))
{
// no scale
return true;
}
if(basegfx::fTools::equal(rScaleX, 1.0) && basegfx::fTools::equal(rScaleY, 1.0))
{
// no scale
return true;
}
#ifdef DBG_UTIL
// #121233# allow to test the different scalers in debug build with source
// level debugger (change nNumber to desired action)
static sal_uInt16 nNumber(0);
const sal_uInt16 nStartCount(GetBitCount());
switch(nNumber)
{
case 0 : break;
case 1: nScaleFlag = BMP_SCALE_FAST; break;
case 2: nScaleFlag = BMP_SCALE_INTERPOLATE; break;
case 3: nScaleFlag = BMP_SCALE_SUPER; break;
case 4: nScaleFlag = BMP_SCALE_LANCZOS; break;
case 5: nScaleFlag = BMP_SCALE_BICUBIC; break;
case 6: nScaleFlag = BMP_SCALE_BILINEAR; break;
case 7: nScaleFlag = BMP_SCALE_BOX; break;
case 8: nScaleFlag = BMP_SCALE_BESTQUALITY; break;
case 9: nScaleFlag = BMP_SCALE_FASTESTINTERPOLATE; break;
}
#endif // DBG_UTIL
bool bRetval(false);
if(BMP_SCALE_BESTQUALITY == nScaleFlag)
{
// Use LANCZOS when best quality is requested
nScaleFlag = BMP_SCALE_LANCZOS;
}
else if(BMP_SCALE_FASTESTINTERPOLATE == nScaleFlag)
{
// Use BMP_SCALE_SUPER when speed is requested, but not worst quality
nScaleFlag = BMP_SCALE_SUPER;
}
switch(nScaleFlag)
{
default:
case BMP_SCALE_NONE :
{
bRetval = false;
break;
}
case BMP_SCALE_FAST :
{
bRetval = ImplScaleFast( rScaleX, rScaleY );
break;
}
case BMP_SCALE_INTERPOLATE :
{
bRetval = ImplScaleInterpolate( rScaleX, rScaleY );
break;
}
case BMP_SCALE_SUPER :
{
if(GetSizePixel().Width() < 2 || GetSizePixel().Height() < 2)
{
// fallback to ImplScaleFast
bRetval = ImplScaleFast( rScaleX, rScaleY );
}
else
{
// #121233# use method from symphony
bRetval = ImplScaleSuper( rScaleX, rScaleY );
}
break;
}
case BMP_SCALE_LANCZOS :
{
const Lanczos3Kernel kernel;
bRetval = ImplScaleConvolution( rScaleX, rScaleY, kernel);
break;
}
case BMP_SCALE_BICUBIC :
{
const BicubicKernel kernel;
bRetval = ImplScaleConvolution( rScaleX, rScaleY, kernel );
break;
}
case BMP_SCALE_BILINEAR :
{
const BilinearKernel kernel;
bRetval = ImplScaleConvolution( rScaleX, rScaleY, kernel );
break;
}
case BMP_SCALE_BOX :
{
const BoxKernel kernel;
bRetval = ImplScaleConvolution( rScaleX, rScaleY, kernel );
break;
}
}
#ifdef DBG_UTIL
if(bRetval && nStartCount != GetBitCount())
{
OSL_ENSURE(false, "Bitmap::Scale has changed the ColorDepth, this should *not* happen (!)");
}
#endif
return bRetval;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::Scale( const Size& rNewSize, sal_uInt32 nScaleFlag )
{
const Size aSize( GetSizePixel() );
sal_Bool bRet;
if( aSize.Width() && aSize.Height() )
{
bRet = Scale( (double) rNewSize.Width() / aSize.Width(),
(double) rNewSize.Height() / aSize.Height(),
nScaleFlag );
}
else
bRet = sal_True;
return bRet;
}
// ------------------------------------------------------------------------
void Bitmap::AdaptBitCount(Bitmap& rNew) const
{
ImplAdaptBitCount(rNew);
}
// ------------------------------------------------------------------------
void Bitmap::ImplAdaptBitCount(Bitmap& rNew) const
{
// aNew is the result of some operation; adapt it's BitCount to the original (this)
if(GetBitCount() != rNew.GetBitCount())
{
switch(GetBitCount())
{
case 1:
{
rNew.Convert(BMP_CONVERSION_1BIT_THRESHOLD);
break;
}
case 4:
{
if(HasGreyPalette())
{
rNew.Convert(BMP_CONVERSION_4BIT_GREYS);
}
else
{
rNew.Convert(BMP_CONVERSION_4BIT_COLORS);
}
break;
}
case 8:
{
if(HasGreyPalette())
{
rNew.Convert(BMP_CONVERSION_8BIT_GREYS);
}
else
{
rNew.Convert(BMP_CONVERSION_8BIT_COLORS);
}
break;
}
case 24:
{
rNew.Convert(BMP_CONVERSION_24BIT);
break;
}
default:
{
OSL_ENSURE(false, "BitDepth adaption failed (!)");
break;
}
}
}
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplScaleFast( const double& rScaleX, const double& rScaleY )
{
const Size aSizePix( GetSizePixel() );
const long nNewWidth = FRound( aSizePix.Width() * rScaleX );
const long nNewHeight = FRound( aSizePix.Height() * rScaleY );
sal_Bool bRet = sal_False;
if( nNewWidth && nNewHeight )
{
BitmapReadAccess* pReadAcc = AcquireReadAccess();
if ( !pReadAcc )
return sal_False;
Bitmap aNewBmp( Size( nNewWidth, nNewHeight ), GetBitCount(), &pReadAcc->GetPalette() );
BitmapWriteAccess* pWriteAcc = aNewBmp.AcquireWriteAccess();
if( pWriteAcc )
{
const long nScanlineSize = pWriteAcc->GetScanlineSize();
const long nNewWidth1 = nNewWidth - 1L;
const long nNewHeight1 = nNewHeight - 1L;
const long nWidth = pReadAcc->Width();
const long nHeight = pReadAcc->Height();
long* pLutX = new long[ nNewWidth ];
long* pLutY = new long[ nNewHeight ];
long nX, nY, nMapY, nActY = 0L;
if( nNewWidth1 && nNewHeight1 )
{
for( nX = 0L; nX < nNewWidth; nX++ )
pLutX[ nX ] = nX * nWidth / nNewWidth;
for( nY = 0L; nY < nNewHeight; nY++ )
pLutY[ nY ] = nY * nHeight / nNewHeight;
while( nActY < nNewHeight )
{
nMapY = pLutY[ nActY ];
for( nX = 0L; nX < nNewWidth; nX++ )
pWriteAcc->SetPixel( nActY, nX, pReadAcc->GetPixel( nMapY , pLutX[ nX ] ) );
while( ( nActY < nNewHeight1 ) && ( pLutY[ nActY + 1 ] == nMapY ) )
{
memcpy( pWriteAcc->GetScanline( nActY + 1L ),
pWriteAcc->GetScanline( nActY ), nScanlineSize );
nActY++;
}
nActY++;
}
bRet = sal_True;
}
delete[] pLutX;
delete[] pLutY;
}
ReleaseAccess( pReadAcc );
aNewBmp.ReleaseAccess( pWriteAcc );
if( bRet )
ImplAssignWithSize( aNewBmp );
}
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplScaleInterpolate( const double& rScaleX, const double& rScaleY )
{
const Size aSizePix( GetSizePixel() );
const long nNewWidth = FRound( aSizePix.Width() * rScaleX );
const long nNewHeight = FRound( aSizePix.Height() * rScaleY );
sal_Bool bRet = sal_False;
if( ( nNewWidth > 1L ) && ( nNewHeight > 1L ) )
{
BitmapColor aCol0;
BitmapColor aCol1;
BitmapReadAccess* pReadAcc = AcquireReadAccess();
long nWidth = pReadAcc->Width();
long nHeight = pReadAcc->Height();
Bitmap aNewBmp( Size( nNewWidth, nHeight ), 24 );
BitmapWriteAccess* pWriteAcc = aNewBmp.AcquireWriteAccess();
long* pLutInt;
long* pLutFrac;
long nX, nY;
long lXB0, lXB1, lXG0, lXG1, lXR0, lXR1;
double fTemp;
long nTemp;
if( pReadAcc && pWriteAcc )
{
const long nNewWidth1 = nNewWidth - 1L;
const long nWidth1 = pReadAcc->Width() - 1L;
const double fRevScaleX = (double) nWidth1 / nNewWidth1;
pLutInt = new long[ nNewWidth ];
pLutFrac = new long[ nNewWidth ];
for( nX = 0L, nTemp = nWidth - 2L; nX < nNewWidth; nX++ )
{
fTemp = nX * fRevScaleX;
pLutInt[ nX ] = MinMax( (long) fTemp, 0, nTemp );
fTemp -= pLutInt[ nX ];
pLutFrac[ nX ] = (long) ( fTemp * 1024. );
}
for( nY = 0L; nY < nHeight; nY++ )
{
if( 1 == nWidth )
{
if( pReadAcc->HasPalette() )
{
aCol0 = pReadAcc->GetPaletteColor( pReadAcc->GetPixelIndex( nY, 0 ) );
}
else
{
aCol0 = pReadAcc->GetPixel( nY, 0 );
}
for( nX = 0L; nX < nNewWidth; nX++ )
{
pWriteAcc->SetPixel( nY, nX, aCol0 );
}
}
else
{
for( nX = 0L; nX < nNewWidth; nX++ )
{
nTemp = pLutInt[ nX ];
if( pReadAcc->HasPalette() )
{
aCol0 = pReadAcc->GetPaletteColor( pReadAcc->GetPixelIndex( nY, nTemp++ ) );
aCol1 = pReadAcc->GetPaletteColor( pReadAcc->GetPixelIndex( nY, nTemp ) );
}
else
{
aCol0 = pReadAcc->GetPixel( nY, nTemp++ );
aCol1 = pReadAcc->GetPixel( nY, nTemp );
}
nTemp = pLutFrac[ nX ];
lXR1 = aCol1.GetRed() - ( lXR0 = aCol0.GetRed() );
lXG1 = aCol1.GetGreen() - ( lXG0 = aCol0.GetGreen() );
lXB1 = aCol1.GetBlue() - ( lXB0 = aCol0.GetBlue() );
aCol0.SetRed( (sal_uInt8) ( ( lXR1 * nTemp + ( lXR0 << 10 ) ) >> 10 ) );
aCol0.SetGreen( (sal_uInt8) ( ( lXG1 * nTemp + ( lXG0 << 10 ) ) >> 10 ) );
aCol0.SetBlue( (sal_uInt8) ( ( lXB1 * nTemp + ( lXB0 << 10 ) ) >> 10 ) );
pWriteAcc->SetPixel( nY, nX, aCol0 );
}
}
}
delete[] pLutInt;
delete[] pLutFrac;
bRet = sal_True;
}
ReleaseAccess( pReadAcc );
aNewBmp.ReleaseAccess( pWriteAcc );
if( bRet )
{
bRet = sal_False;
const Bitmap aOriginal(*this);
*this = aNewBmp;
aNewBmp = Bitmap( Size( nNewWidth, nNewHeight ), 24 );
pReadAcc = AcquireReadAccess();
pWriteAcc = aNewBmp.AcquireWriteAccess();
if( pReadAcc && pWriteAcc )
{
const long nNewHeight1 = nNewHeight - 1L;
const long nHeight1 = pReadAcc->Height() - 1L;
const double fRevScaleY = (double) nHeight1 / nNewHeight1;
pLutInt = new long[ nNewHeight ];
pLutFrac = new long[ nNewHeight ];
for( nY = 0L, nTemp = nHeight - 2L; nY < nNewHeight; nY++ )
{
fTemp = nY * fRevScaleY;
pLutInt[ nY ] = MinMax( (long) fTemp, 0, nTemp );
fTemp -= pLutInt[ nY ];
pLutFrac[ nY ] = (long) ( fTemp * 1024. );
}
// after 1st step, bitmap *is* 24bit format (see above)
OSL_ENSURE(!pReadAcc->HasPalette(), "OOps, somehow ImplScaleInterpolate in-between format has palette, should not happen (!)");
for( nX = 0L; nX < nNewWidth; nX++ )
{
if( 1 == nHeight )
{
aCol0 = pReadAcc->GetPixel( 0, nX );
for( nY = 0L; nY < nNewHeight; nY++ )
{
pWriteAcc->SetPixel( nY, nX, aCol0 );
}
}
else
{
for( nY = 0L; nY < nNewHeight; nY++ )
{
nTemp = pLutInt[ nY ];
aCol0 = pReadAcc->GetPixel( nTemp++, nX );
aCol1 = pReadAcc->GetPixel( nTemp, nX );
nTemp = pLutFrac[ nY ];
lXR1 = aCol1.GetRed() - ( lXR0 = aCol0.GetRed() );
lXG1 = aCol1.GetGreen() - ( lXG0 = aCol0.GetGreen() );
lXB1 = aCol1.GetBlue() - ( lXB0 = aCol0.GetBlue() );
aCol0.SetRed( (sal_uInt8) ( ( lXR1 * nTemp + ( lXR0 << 10 ) ) >> 10 ) );
aCol0.SetGreen( (sal_uInt8) ( ( lXG1 * nTemp + ( lXG0 << 10 ) ) >> 10 ) );
aCol0.SetBlue( (sal_uInt8) ( ( lXB1 * nTemp + ( lXB0 << 10 ) ) >> 10 ) );
pWriteAcc->SetPixel( nY, nX, aCol0 );
}
}
}
delete[] pLutInt;
delete[] pLutFrac;
bRet = sal_True;
}
ReleaseAccess( pReadAcc );
aNewBmp.ReleaseAccess( pWriteAcc );
if( bRet )
{
aOriginal.ImplAdaptBitCount(aNewBmp);
*this = aNewBmp;
}
}
}
if( !bRet )
{
bRet = ImplScaleFast( rScaleX, rScaleY );
}
return bRet;
}
// ------------------------------------------------------------------------
// #121233# Added BMP_SCALE_SUPER from symphony code
sal_Bool Bitmap::ImplScaleSuper(
const double& rScaleX,
const double& rScaleY )
{
const Size aSizePix( GetSizePixel() );
bool bHMirr = ( rScaleX < 0 );
bool bVMirr = ( rScaleY < 0 );
double scaleX = bHMirr ? -rScaleX : rScaleX;
double scaleY = bVMirr ? -rScaleY : rScaleY;
const long nDstW = FRound( aSizePix.Width() * scaleX );
const long nDstH = FRound( aSizePix.Height() * scaleY );
const double fScaleThresh = 0.6;
bool bRet = false;
if( ( nDstW > 1L ) && ( nDstH > 1L ) )
{
BitmapColor aCol0, aCol1, aColRes;
BitmapReadAccess* pAcc = AcquireReadAccess();
long nW = pAcc->Width() ;
long nH = pAcc->Height() ;
Bitmap aOutBmp( Size( nDstW, nDstH ), 24 );
BitmapWriteAccess* pWAcc = aOutBmp.AcquireWriteAccess();
long* pMapIX = new long[ nDstW ];
long* pMapIY = new long[ nDstH ];
long* pMapFX = new long[ nDstW ];
long* pMapFY = new long[ nDstH ];
long nX, nY, nXDst, nYDst;;
double fTemp;
long nTemp , nTempX, nTempY, nTempFX, nTempFY;
sal_uInt8 cR0, cG0, cB0, cR1, cG1, cB1;
long nStartX = 0 , nStartY = 0;
long nEndX = nDstW - 1L;
long nEndY = nDstH - 1L;
long nMax = 1 << 7L;
if( pAcc && pWAcc )
{
const double fRevScaleX = ( nDstW > 1L ) ? ( (double) ( nW - 1 ) / ( nDstW - 1 ) ) : 0.0;
const double fRevScaleY = ( nDstH > 1L ) ? ( (double) ( nH - 1 ) / ( nDstH - 1 ) ) : 0.0;
// create horizontal mapping table
for( nX = 0L, nTempX = nW - 1L, nTemp = nW - 2L; nX < nDstW; nX++ )
{
fTemp = nX * fRevScaleX;
if( bHMirr )
fTemp = nTempX - fTemp;
pMapFX[ nX ] = (long) ( ( fTemp - ( pMapIX[ nX ] = MinMax( (long) fTemp, 0, nTemp ) ) ) * 128. );
}
// create vertical mapping table
for( nY = 0L, nTempY = nH - 1L, nTemp = nH - 2L; nY < nDstH; nY++ )
{
fTemp = nY * fRevScaleY;
if( bVMirr )
fTemp = nTempY - fTemp;
pMapFY[ nY ] = (long) ( ( fTemp - ( pMapIY[ nY ] = MinMax( (long) fTemp, 0, nTemp ) ) ) * 128. );
}
if( pAcc->HasPalette() )
{
if( pAcc->GetScanlineFormat() == BMP_FORMAT_8BIT_PAL )
{
if( scaleX >= fScaleThresh && scaleY >= fScaleThresh )
{
Scanline pLine0, pLine1;
for( nY = nStartY, nYDst = 0L; nY <= nEndY; nY++, nYDst++ )
{
nTempY = pMapIY[ nY ]; nTempFY = pMapFY[ nY ];
pLine0 = pAcc->GetScanline( nTempY );
pLine1 = pAcc->GetScanline( ++nTempY );
for( nX = nStartX, nXDst = 0L; nX <= nEndX; nX++ )
{
nTempX = pMapIX[ nX ]; nTempFX = pMapFX[ nX ];
const BitmapColor& rCol0 = pAcc->GetPaletteColor( pLine0[ nTempX ] );
const BitmapColor& rCol2 = pAcc->GetPaletteColor( pLine1[ nTempX ] );
const BitmapColor& rCol1 = pAcc->GetPaletteColor( pLine0[ ++nTempX ] );
const BitmapColor& rCol3 = pAcc->GetPaletteColor( pLine1[ nTempX ] );
cR0 = MAP( rCol0.GetRed(), rCol1.GetRed(), nTempFX );
cG0 = MAP( rCol0.GetGreen(), rCol1.GetGreen(), nTempFX );
cB0 = MAP( rCol0.GetBlue(), rCol1.GetBlue(), nTempFX );
cR1 = MAP( rCol2.GetRed(), rCol3.GetRed(), nTempFX );
cG1 = MAP( rCol2.GetGreen(), rCol3.GetGreen(), nTempFX );
cB1 = MAP( rCol2.GetBlue(), rCol3.GetBlue(), nTempFX );
aColRes.SetRed( MAP( cR0, cR1, nTempFY ) );
aColRes.SetGreen( MAP( cG0, cG1, nTempFY ) );
aColRes.SetBlue( MAP( cB0, cB1, nTempFY ) );
pWAcc->SetPixel( nYDst, nXDst++, aColRes );
}
}
}
else
{
Scanline pTmpY;
long nSumR, nSumG, nSumB,nLineStart , nLineRange, nRowStart , nRowRange ;
long nLeft, nRight, nTop, nBottom, nWeightX, nWeightY ;
long nSumRowR ,nSumRowG,nSumRowB, nTotalWeightX, nTotalWeightY;
for( nY = nStartY , nYDst = 0L; nY <= nEndY; nY++, nYDst++ )
{
nTop = bVMirr ? ( nY + 1 ) : nY;
nBottom = bVMirr ? nY : ( nY + 1 ) ;
if( nY ==nEndY )
{
nLineStart = pMapIY[ nY ];
nLineRange = 0;
}
else
{
nLineStart = pMapIY[ nTop ] ;
nLineRange = ( pMapIY[ nBottom ] == pMapIY[ nTop ] ) ? 1 :( pMapIY[ nBottom ] - pMapIY[ nTop ] );
}
for( nX = nStartX , nXDst = 0L; nX <= nEndX; nX++ )
{
nLeft = bHMirr ? ( nX + 1 ) : nX;
nRight = bHMirr ? nX : ( nX + 1 ) ;
if( nX == nEndX )
{
nRowStart = pMapIX[ nX ];
nRowRange = 0;
}
else
{
nRowStart = pMapIX[ nLeft ];
nRowRange = ( pMapIX[ nRight ] == pMapIX[ nLeft ] )? 1 : ( pMapIX[ nRight ] - pMapIX[ nLeft ] );
}
nSumR = nSumG = nSumB = 0;
nTotalWeightY = 0;
for(int i = 0; i<= nLineRange; i++)
{
pTmpY = pAcc->GetScanline( nLineStart + i );
nSumRowR = nSumRowG = nSumRowB = 0;
nTotalWeightX = 0;
for(int j = 0; j <= nRowRange; j++)
{
const BitmapColor& rCol = pAcc->GetPaletteColor( pTmpY[ nRowStart + j ] );
if(nX == nEndX )
{
nSumRowB += rCol.GetBlue() << 7L;
nSumRowG += rCol.GetGreen() << 7L;
nSumRowR += rCol.GetRed() << 7L;
nTotalWeightX += 1 << 7L;
}
else if( j == 0 )
{
nWeightX = (nMax- pMapFX[ nLeft ]) ;
nSumRowB += ( nWeightX *rCol.GetBlue()) ;
nSumRowG += ( nWeightX *rCol.GetGreen()) ;
nSumRowR += ( nWeightX *rCol.GetRed()) ;
nTotalWeightX += nWeightX;
}
else if ( nRowRange == j )
{
nWeightX = pMapFX[ nRight ] ;
nSumRowB += ( nWeightX *rCol.GetBlue() );
nSumRowG += ( nWeightX *rCol.GetGreen() );
nSumRowR += ( nWeightX *rCol.GetRed() );
nTotalWeightX += nWeightX;
}
else
{
nSumRowB += rCol.GetBlue() << 7L;
nSumRowG += rCol.GetGreen() << 7L;
nSumRowR += rCol.GetRed() << 7L;
nTotalWeightX += 1 << 7L;
}
}
if( nY == nEndY )
nWeightY = nMax;
else if( i == 0 )
nWeightY = nMax - pMapFY[ nTop ];
else if( nLineRange == 1 )
nWeightY = pMapFY[ nTop ];
else if ( nLineRange == i )
nWeightY = pMapFY[ nBottom ];
else
nWeightY = nMax;
nSumB += nWeightY * ( nSumRowB / nTotalWeightX );
nSumG += nWeightY * ( nSumRowG / nTotalWeightX );
nSumR += nWeightY * ( nSumRowR / nTotalWeightX );
nTotalWeightY += nWeightY;
}
aColRes.SetRed( ( sal_uInt8 ) (( nSumR / nTotalWeightY ) ));
aColRes.SetGreen( ( sal_uInt8 ) (( nSumG / nTotalWeightY) ));
aColRes.SetBlue( ( sal_uInt8 ) (( nSumB / nTotalWeightY ) ));
pWAcc->SetPixel( nYDst, nXDst++, aColRes );
}
}
}
}
else
{
if( scaleX >= fScaleThresh && scaleY >= fScaleThresh )
{
for( nY = nStartY, nYDst = 0L; nY <= nEndY; nY++, nYDst++ )
{
nTempY = pMapIY[ nY ], nTempFY = pMapFY[ nY ];
for( nX = nStartX, nXDst = 0L; nX <= nEndX; nX++ )
{
nTempX = pMapIX[ nX ]; nTempFX = pMapFX[ nX ];
aCol0 = pAcc->GetPaletteColor( pAcc->GetPixelIndex( nTempY, nTempX ) );
aCol1 = pAcc->GetPaletteColor( pAcc->GetPixelIndex( nTempY, ++nTempX ) );
cR0 = MAP( aCol0.GetRed(), aCol1.GetRed(), nTempFX );
cG0 = MAP( aCol0.GetGreen(), aCol1.GetGreen(), nTempFX );
cB0 = MAP( aCol0.GetBlue(), aCol1.GetBlue(), nTempFX );
aCol1 = pAcc->GetPaletteColor( pAcc->GetPixelIndex( ++nTempY, nTempX ) );
aCol0 = pAcc->GetPaletteColor( pAcc->GetPixelIndex( nTempY--, --nTempX ) );
cR1 = MAP( aCol0.GetRed(), aCol1.GetRed(), nTempFX );
cG1 = MAP( aCol0.GetGreen(), aCol1.GetGreen(), nTempFX );
cB1 = MAP( aCol0.GetBlue(), aCol1.GetBlue(), nTempFX );
aColRes.SetRed( MAP( cR0, cR1, nTempFY ) );
aColRes.SetGreen( MAP( cG0, cG1, nTempFY ) );
aColRes.SetBlue( MAP( cB0, cB1, nTempFY ) );
pWAcc->SetPixel( nYDst, nXDst++, aColRes );
}
}
}
else
{
long nSumR, nSumG, nSumB,nLineStart , nLineRange, nRowStart , nRowRange ;
long nLeft, nRight, nTop, nBottom, nWeightX, nWeightY ;
long nSumRowR ,nSumRowG,nSumRowB, nTotalWeightX, nTotalWeightY;
for( nY = nStartY , nYDst = 0L; nY <= nEndY; nY++, nYDst++ )
{
nTop = bVMirr ? ( nY + 1 ) : nY;
nBottom = bVMirr ? nY : ( nY + 1 ) ;
if( nY ==nEndY )
{
nLineStart = pMapIY[ nY ];
nLineRange = 0;
}
else
{
nLineStart = pMapIY[ nTop ] ;
nLineRange = ( pMapIY[ nBottom ] == pMapIY[ nTop ] ) ? 1 :( pMapIY[ nBottom ] - pMapIY[ nTop ] );
}
for( nX = nStartX , nXDst = 0L; nX <= nEndX; nX++ )
{
nLeft = bHMirr ? ( nX + 1 ) : nX;
nRight = bHMirr ? nX : ( nX + 1 ) ;
if( nX == nEndX )
{
nRowStart = pMapIX[ nX ];
nRowRange = 0;
}
else
{
nRowStart = pMapIX[ nLeft ];
nRowRange = ( pMapIX[ nRight ] == pMapIX[ nLeft ] )? 1 : ( pMapIX[ nRight ] - pMapIX[ nLeft ] );
}
nSumR = nSumG = nSumB = 0;
nTotalWeightY = 0;
for(int i = 0; i<= nLineRange; i++)
{
nSumRowR = nSumRowG = nSumRowB = 0;
nTotalWeightX = 0;
for(int j = 0; j <= nRowRange; j++)
{
aCol0 = pAcc->GetPaletteColor ( pAcc->GetPixelIndex( nLineStart + i, nRowStart + j ) );
if(nX == nEndX )
{
nSumRowB += aCol0.GetBlue() << 7L;
nSumRowG += aCol0.GetGreen() << 7L;
nSumRowR += aCol0.GetRed() << 7L;
nTotalWeightX += 1 << 7L;
}
else if( j == 0 )
{
nWeightX = (nMax- pMapFX[ nLeft ]) ;
nSumRowB += ( nWeightX *aCol0.GetBlue()) ;
nSumRowG += ( nWeightX *aCol0.GetGreen()) ;
nSumRowR += ( nWeightX *aCol0.GetRed()) ;
nTotalWeightX += nWeightX;
}
else if ( nRowRange == j )
{
nWeightX = pMapFX[ nRight ] ;
nSumRowB += ( nWeightX *aCol0.GetBlue() );
nSumRowG += ( nWeightX *aCol0.GetGreen() );
nSumRowR += ( nWeightX *aCol0.GetRed() );
nTotalWeightX += nWeightX;
}
else
{
nSumRowB += aCol0.GetBlue() << 7L;
nSumRowG += aCol0.GetGreen() << 7L;
nSumRowR += aCol0.GetRed() << 7L;
nTotalWeightX += 1 << 7L;
}
}
if( nY == nEndY )
nWeightY = nMax;
else if( i == 0 )
nWeightY = nMax - pMapFY[ nTop ];
else if( nLineRange == 1 )
nWeightY = pMapFY[ nTop ];
else if ( nLineRange == i )
nWeightY = pMapFY[ nBottom ];
else
nWeightY = nMax;
nSumB += nWeightY * ( nSumRowB / nTotalWeightX );
nSumG += nWeightY * ( nSumRowG / nTotalWeightX );
nSumR += nWeightY * ( nSumRowR / nTotalWeightX );
nTotalWeightY += nWeightY;
}
aColRes.SetRed( ( sal_uInt8 ) (( nSumR / nTotalWeightY ) ));
aColRes.SetGreen( ( sal_uInt8 ) (( nSumG / nTotalWeightY) ));
aColRes.SetBlue( ( sal_uInt8 ) (( nSumB / nTotalWeightY ) ));
pWAcc->SetPixel( nYDst, nXDst++, aColRes );
}
}
}
}
}
else
{
if( pAcc->GetScanlineFormat() == BMP_FORMAT_24BIT_TC_BGR )
{
if( scaleX >= fScaleThresh && scaleY >= fScaleThresh )
{
Scanline pLine0, pLine1, pTmp0, pTmp1;
long nOff;
for( nY = nStartY, nYDst = 0L; nY <= nEndY; nY++, nYDst++ )
{
nTempY = pMapIY[ nY ]; nTempFY = pMapFY[ nY ];
pLine0 = pAcc->GetScanline( nTempY );
pLine1 = pAcc->GetScanline( ++nTempY );
for( nX = nStartX, nXDst = 0L; nX <= nEndX; nX++ )
{
nOff = 3L * ( nTempX = pMapIX[ nX ] );
nTempFX = pMapFX[ nX ];
pTmp1 = ( pTmp0 = pLine0 + nOff ) + 3L;
cB0 = MAP( *pTmp0, *pTmp1, nTempFX ); pTmp0++; pTmp1++;
cG0 = MAP( *pTmp0, *pTmp1, nTempFX ); pTmp0++; pTmp1++;
cR0 = MAP( *pTmp0, *pTmp1, nTempFX );
pTmp1 = ( pTmp0 = pLine1 + nOff ) + 3L;
cB1 = MAP( *pTmp0, *pTmp1, nTempFX ); pTmp0++; pTmp1++;
cG1 = MAP( *pTmp0, *pTmp1, nTempFX ); pTmp0++; pTmp1++;
cR1 = MAP( *pTmp0, *pTmp1, nTempFX );
aColRes.SetRed( MAP( cR0, cR1, nTempFY ) );
aColRes.SetGreen( MAP( cG0, cG1, nTempFY ) );
aColRes.SetBlue( MAP( cB0, cB1, nTempFY ) );
pWAcc->SetPixel( nYDst, nXDst++, aColRes );
}
}
}
else
{
Scanline pTmpY, pTmpX;
long nSumR, nSumG, nSumB,nLineStart , nLineRange, nRowStart , nRowRange ;
long nLeft, nRight, nTop, nBottom, nWeightX, nWeightY ;
long nSumRowR ,nSumRowG,nSumRowB, nTotalWeightX, nTotalWeightY;
for( nY = nStartY , nYDst = 0L; nY <= nEndY; nY++, nYDst++ )
{
nTop = bVMirr ? ( nY + 1 ) : nY;
nBottom = bVMirr ? nY : ( nY + 1 ) ;
if( nY ==nEndY )
{
nLineStart = pMapIY[ nY ];
nLineRange = 0;
}
else
{
nLineStart = pMapIY[ nTop ] ;
nLineRange = ( pMapIY[ nBottom ] == pMapIY[ nTop ] ) ? 1 :( pMapIY[ nBottom ] - pMapIY[ nTop ] );
}
for( nX = nStartX , nXDst = 0L; nX <= nEndX; nX++ )
{
nLeft = bHMirr ? ( nX + 1 ) : nX;
nRight = bHMirr ? nX : ( nX + 1 ) ;
if( nX == nEndX )
{
nRowStart = pMapIX[ nX ];
nRowRange = 0;
}
else
{
nRowStart = pMapIX[ nLeft ];
nRowRange = ( pMapIX[ nRight ] == pMapIX[ nLeft ] )? 1 : ( pMapIX[ nRight ] - pMapIX[ nLeft ] );
}
nSumR = nSumG = nSumB = 0;
nTotalWeightY = 0;
for(int i = 0; i<= nLineRange; i++)
{
pTmpY = pAcc->GetScanline( nLineStart + i );
pTmpX = pTmpY + 3L * nRowStart;
nSumRowR = nSumRowG = nSumRowB = 0;
nTotalWeightX = 0;
for(int j = 0; j <= nRowRange; j++)
{
if(nX == nEndX )
{
nSumRowB += ( *pTmpX ) << 7L;pTmpX++;
nSumRowG += ( *pTmpX ) << 7L;pTmpX++;
nSumRowR += ( *pTmpX ) << 7L;pTmpX++;
nTotalWeightX += 1 << 7L;
}
else if( j == 0 )
{
nWeightX = (nMax- pMapFX[ nLeft ]) ;
nSumRowB += ( nWeightX *( *pTmpX )) ;pTmpX++;
nSumRowG += ( nWeightX *( *pTmpX )) ;pTmpX++;
nSumRowR += ( nWeightX *( *pTmpX )) ;pTmpX++;
nTotalWeightX += nWeightX;
}
else if ( nRowRange == j )
{
nWeightX = pMapFX[ nRight ] ;
nSumRowB += ( nWeightX *( *pTmpX ) );pTmpX++;
nSumRowG += ( nWeightX *( *pTmpX ) );pTmpX++;
nSumRowR += ( nWeightX *( *pTmpX ) );pTmpX++;
nTotalWeightX += nWeightX;
}
else
{
nSumRowB += ( *pTmpX ) << 7L;pTmpX++;
nSumRowG += ( *pTmpX ) << 7L;pTmpX++;
nSumRowR += ( *pTmpX ) << 7L;pTmpX++;
nTotalWeightX += 1 << 7L;
}
}
if( nY == nEndY )
nWeightY = nMax;
else if( i == 0 )
nWeightY = nMax - pMapFY[ nTop ];
else if( nLineRange == 1 )
nWeightY = pMapFY[ nTop ];
else if ( nLineRange == i )
nWeightY = pMapFY[ nBottom ];
else
nWeightY = nMax;
nSumB += nWeightY * ( nSumRowB / nTotalWeightX );
nSumG += nWeightY * ( nSumRowG / nTotalWeightX );
nSumR += nWeightY * ( nSumRowR / nTotalWeightX );
nTotalWeightY += nWeightY;
}
aColRes.SetRed( ( sal_uInt8 ) (( nSumR / nTotalWeightY ) ));
aColRes.SetGreen( ( sal_uInt8 ) (( nSumG / nTotalWeightY) ));
aColRes.SetBlue( ( sal_uInt8 ) (( nSumB / nTotalWeightY ) ));
pWAcc->SetPixel( nYDst, nXDst++, aColRes );
}
}
}
}
else if( pAcc->GetScanlineFormat() == BMP_FORMAT_24BIT_TC_RGB )
{
if( scaleX >= fScaleThresh && scaleY >= fScaleThresh )
{
Scanline pLine0, pLine1, pTmp0, pTmp1;
long nOff;
for( nY = nStartY, nYDst = 0L; nY <= nEndY; nY++, nYDst++ )
{
nTempY = pMapIY[ nY ]; nTempFY = pMapFY[ nY ];
pLine0 = pAcc->GetScanline( nTempY );
pLine1 = pAcc->GetScanline( ++nTempY );
for( nX = nStartX, nXDst = 0L; nX <= nEndX; nX++ )
{
nOff = 3L * ( nTempX = pMapIX[ nX ] );
nTempFX = pMapFX[ nX ];
pTmp1 = ( pTmp0 = pLine0 + nOff ) + 3L;
cR0 = MAP( *pTmp0, *pTmp1, nTempFX ); pTmp0++; pTmp1++;
cG0 = MAP( *pTmp0, *pTmp1, nTempFX ); pTmp0++; pTmp1++;
cB0 = MAP( *pTmp0, *pTmp1, nTempFX );
pTmp1 = ( pTmp0 = pLine1 + nOff ) + 3L;
cR1 = MAP( *pTmp0, *pTmp1, nTempFX ); pTmp0++; pTmp1++;
cG1 = MAP( *pTmp0, *pTmp1, nTempFX ); pTmp0++; pTmp1++;
cB1 = MAP( *pTmp0, *pTmp1, nTempFX );
aColRes.SetRed( MAP( cR0, cR1, nTempFY ) );
aColRes.SetGreen( MAP( cG0, cG1, nTempFY ) );
aColRes.SetBlue( MAP( cB0, cB1, nTempFY ) );
pWAcc->SetPixel( nYDst, nXDst++, aColRes );
}
}
}
else
{
Scanline pTmpY, pTmpX;
long nSumR, nSumG, nSumB,nLineStart , nLineRange, nRowStart , nRowRange ;
long nLeft, nRight, nTop, nBottom, nWeightX, nWeightY ;
long nSumRowR ,nSumRowG,nSumRowB, nTotalWeightX, nTotalWeightY;
for( nY = nStartY , nYDst = 0L; nY <= nEndY; nY++, nYDst++ )
{
nTop = bVMirr ? ( nY + 1 ) : nY;
nBottom = bVMirr ? nY : ( nY + 1 ) ;
if( nY ==nEndY )
{
nLineStart = pMapIY[ nY ];
nLineRange = 0;
}
else
{
nLineStart = pMapIY[ nTop ] ;
nLineRange = ( pMapIY[ nBottom ] == pMapIY[ nTop ] ) ? 1 :( pMapIY[ nBottom ] - pMapIY[ nTop ] );
}
for( nX = nStartX , nXDst = 0L; nX <= nEndX; nX++ )
{
nLeft = bHMirr ? ( nX + 1 ) : nX;
nRight = bHMirr ? nX : ( nX + 1 ) ;
if( nX == nEndX )
{
nRowStart = pMapIX[ nX ];
nRowRange = 0;
}
else
{
nRowStart = pMapIX[ nLeft ];
nRowRange = ( pMapIX[ nRight ] == pMapIX[ nLeft ] )? 1 : ( pMapIX[ nRight ] - pMapIX[ nLeft ] );
}
nSumR = nSumG = nSumB = 0;
nTotalWeightY = 0;
for(int i = 0; i<= nLineRange; i++)
{
pTmpY = pAcc->GetScanline( nLineStart + i );
pTmpX = pTmpY + 3L * nRowStart;
nSumRowR = nSumRowG = nSumRowB = 0;
nTotalWeightX = 0;
for(int j = 0; j <= nRowRange; j++)
{
if(nX == nEndX )
{
nSumRowR += ( *pTmpX ) << 7L;pTmpX++;
nSumRowG += ( *pTmpX ) << 7L;pTmpX++;
nSumRowB += ( *pTmpX ) << 7L;pTmpX++;
nTotalWeightX += 1 << 7L;
}
else if( j == 0 )
{
nWeightX = (nMax- pMapFX[ nLeft ]) ;
nSumRowR += ( nWeightX *( *pTmpX )) ;pTmpX++;
nSumRowG += ( nWeightX *( *pTmpX )) ;pTmpX++;
nSumRowB += ( nWeightX *( *pTmpX )) ;pTmpX++;
nTotalWeightX += nWeightX;
}
else if ( nRowRange == j )
{
nWeightX = pMapFX[ nRight ] ;
nSumRowR += ( nWeightX *( *pTmpX ) );pTmpX++;
nSumRowG += ( nWeightX *( *pTmpX ) );pTmpX++;
nSumRowB += ( nWeightX *( *pTmpX ) );pTmpX++;
nTotalWeightX += nWeightX;
}
else
{
nSumRowR += ( *pTmpX ) << 7L;pTmpX++;
nSumRowG += ( *pTmpX ) << 7L;pTmpX++;
nSumRowB += ( *pTmpX ) << 7L;pTmpX++;
nTotalWeightX += 1 << 7L;
}
}
if( nY == nEndY )
nWeightY = nMax;
else if( i == 0 )
nWeightY = nMax - pMapFY[ nTop ];
else if( nLineRange == 1 )
nWeightY = pMapFY[ nTop ];
else if ( nLineRange == i )
nWeightY = pMapFY[ nBottom ];
else
nWeightY = nMax;
nSumB += nWeightY * ( nSumRowB / nTotalWeightX );
nSumG += nWeightY * ( nSumRowG / nTotalWeightX );
nSumR += nWeightY * ( nSumRowR / nTotalWeightX );
nTotalWeightY += nWeightY;
}
aColRes.SetRed( ( sal_uInt8 ) (( nSumR / nTotalWeightY ) ));
aColRes.SetGreen( ( sal_uInt8 ) (( nSumG / nTotalWeightY) ));
aColRes.SetBlue( ( sal_uInt8 ) (( nSumB / nTotalWeightY ) ));
pWAcc->SetPixel( nYDst, nXDst++, aColRes );
}
}
}
}
else
{
if( scaleX >= fScaleThresh && scaleY >= fScaleThresh )
{
for( nY = nStartY, nYDst = 0L; nY <= nEndY; nY++, nYDst++ )
{
nTempY = pMapIY[ nY ]; nTempFY = pMapFY[ nY ];
for( nX = nStartX, nXDst = 0L; nX <= nEndX; nX++ )
{
nTempX = pMapIX[ nX ]; nTempFX = pMapFX[ nX ];
aCol0 = pAcc->GetPixel( nTempY, nTempX );
aCol1 = pAcc->GetPixel( nTempY, ++nTempX );
cR0 = MAP( aCol0.GetRed(), aCol1.GetRed(), nTempFX );
cG0 = MAP( aCol0.GetGreen(), aCol1.GetGreen(), nTempFX );
cB0 = MAP( aCol0.GetBlue(), aCol1.GetBlue(), nTempFX );
aCol1 = pAcc->GetPixel( ++nTempY, nTempX );
aCol0 = pAcc->GetPixel( nTempY--, --nTempX );
cR1 = MAP( aCol0.GetRed(), aCol1.GetRed(), nTempFX );
cG1 = MAP( aCol0.GetGreen(), aCol1.GetGreen(), nTempFX );
cB1 = MAP( aCol0.GetBlue(), aCol1.GetBlue(), nTempFX );
aColRes.SetRed( MAP( cR0, cR1, nTempFY ) );
aColRes.SetGreen( MAP( cG0, cG1, nTempFY ) );
aColRes.SetBlue( MAP( cB0, cB1, nTempFY ) );
pWAcc->SetPixel( nYDst, nXDst++, aColRes );
}
}
}
else
{
long nSumR, nSumG, nSumB,nLineStart , nLineRange, nRowStart , nRowRange ;
long nLeft, nRight, nTop, nBottom, nWeightX, nWeightY ;
long nSumRowR ,nSumRowG,nSumRowB, nTotalWeightX, nTotalWeightY;
for( nY = nStartY , nYDst = 0L; nY <= nEndY; nY++, nYDst++ )
{
nTop = bVMirr ? ( nY + 1 ) : nY;
nBottom = bVMirr ? nY : ( nY + 1 ) ;
if( nY ==nEndY )
{
nLineStart = pMapIY[ nY ];
nLineRange = 0;
}
else
{
nLineStart = pMapIY[ nTop ] ;
nLineRange = ( pMapIY[ nBottom ] == pMapIY[ nTop ] ) ? 1 :( pMapIY[ nBottom ] - pMapIY[ nTop ] );
}
for( nX = nStartX , nXDst = 0L; nX <= nEndX; nX++ )
{
nLeft = bHMirr ? ( nX + 1 ) : nX;
nRight = bHMirr ? nX : ( nX + 1 ) ;
if( nX == nEndX )
{
nRowStart = pMapIX[ nX ];
nRowRange = 0;
}
else
{
nRowStart = pMapIX[ nLeft ];
nRowRange = ( pMapIX[ nRight ] == pMapIX[ nLeft ] )? 1 : ( pMapIX[ nRight ] - pMapIX[ nLeft ] );
}
nSumR = nSumG = nSumB = 0;
nTotalWeightY = 0;
for(int i = 0; i<= nLineRange; i++)
{
nSumRowR = nSumRowG = nSumRowB = 0;
nTotalWeightX = 0;
for(int j = 0; j <= nRowRange; j++)
{
aCol0 = pAcc->GetPixel( nLineStart + i, nRowStart + j );
if(nX == nEndX )
{
nSumRowB += aCol0.GetBlue() << 7L;
nSumRowG += aCol0.GetGreen() << 7L;
nSumRowR += aCol0.GetRed() << 7L;
nTotalWeightX += 1 << 7L;
}
else if( j == 0 )
{
nWeightX = (nMax- pMapFX[ nLeft ]) ;
nSumRowB += ( nWeightX *aCol0.GetBlue()) ;
nSumRowG += ( nWeightX *aCol0.GetGreen()) ;
nSumRowR += ( nWeightX *aCol0.GetRed()) ;
nTotalWeightX += nWeightX;
}
else if ( nRowRange == j )
{
nWeightX = pMapFX[ nRight ] ;
nSumRowB += ( nWeightX *aCol0.GetBlue() );
nSumRowG += ( nWeightX *aCol0.GetGreen() );
nSumRowR += ( nWeightX *aCol0.GetRed() );
nTotalWeightX += nWeightX;
}
else
{
nSumRowB += aCol0.GetBlue() << 7L;
nSumRowG += aCol0.GetGreen() << 7L;
nSumRowR += aCol0.GetRed() << 7L;
nTotalWeightX += 1 << 7L;
}
}
if( nY == nEndY )
nWeightY = nMax;
else if( i == 0 )
nWeightY = nMax - pMapFY[ nTop ];
else if( nLineRange == 1 )
nWeightY = pMapFY[ nTop ];
else if ( nLineRange == i )
nWeightY = pMapFY[ nBottom ];
else
nWeightY = nMax;
nSumB += nWeightY * ( nSumRowB / nTotalWeightX );
nSumG += nWeightY * ( nSumRowG / nTotalWeightX );
nSumR += nWeightY * ( nSumRowR / nTotalWeightX );
nTotalWeightY += nWeightY;
}
aColRes.SetRed( ( sal_uInt8 ) (( nSumR / nTotalWeightY ) ));
aColRes.SetGreen( ( sal_uInt8 ) (( nSumG / nTotalWeightY) ));
aColRes.SetBlue( ( sal_uInt8 ) (( nSumB / nTotalWeightY ) ));
pWAcc->SetPixel( nYDst, nXDst++, aColRes );
}
}
}
}
}
bRet = true;
}
delete[] pMapIX;
delete[] pMapIY;
delete[] pMapFX;
delete[] pMapFY;
ReleaseAccess( pAcc );
aOutBmp.ReleaseAccess( pWAcc );
if( bRet )
{
ImplAdaptBitCount(aOutBmp);
ImplAssignWithSize(aOutBmp);
}
if( !bRet )
bRet = ImplScaleFast( scaleX, scaleY );
}
return bRet;
}
//-----------------------------------------------------------------------------------
namespace
{
void ImplCalculateContributions(
const sal_uInt32 aSourceSize,
const sal_uInt32 aDestinationSize,
sal_uInt32& aNumberOfContributions,
double*& pWeights,
sal_uInt32*& pPixels,
sal_uInt32*& pCount,
const Kernel& aKernel)
{
const double fSamplingRadius(aKernel.GetWidth());
const double fScale(aDestinationSize / static_cast< double >(aSourceSize));
const double fScaledRadius((fScale < 1.0) ? fSamplingRadius / fScale : fSamplingRadius);
const double fFilterFactor((fScale < 1.0) ? fScale : 1.0);
aNumberOfContributions = (static_cast< sal_uInt32 >(fabs(ceil(fScaledRadius))) * 2) + 1;
const sal_uInt32 nAllocSize(aDestinationSize * aNumberOfContributions);
pWeights = new double[nAllocSize];
pPixels = new sal_uInt32[nAllocSize];
pCount = new sal_uInt32[aDestinationSize];
for(sal_uInt32 i(0); i < aDestinationSize; i++)
{
const sal_uInt32 aIndex(i * aNumberOfContributions);
const double aCenter(i / fScale);
const sal_Int32 aLeft(static_cast< sal_Int32 >(floor(aCenter - fScaledRadius)));
const sal_Int32 aRight(static_cast< sal_Int32 >(ceil(aCenter + fScaledRadius)));
sal_uInt32 aCurrentCount(0);
for(sal_Int32 j(aLeft); j <= aRight; j++)
{
const double aWeight(aKernel.Calculate(fFilterFactor * (aCenter - static_cast< double>(j))));
// Reduce calculations with ignoring weights of 0.0
if(fabs(aWeight) < 0.0001)
{
continue;
}
// Handling on edges
const sal_uInt32 aPixelIndex(MinMax(j, 0, aSourceSize - 1));
const sal_uInt32 nIndex(aIndex + aCurrentCount);
pWeights[nIndex] = aWeight;
pPixels[nIndex] = aPixelIndex;
aCurrentCount++;
}
pCount[i] = aCurrentCount;
}
}
sal_Bool ImplScaleConvolutionHor(
Bitmap& rSource,
Bitmap& rTarget,
const double& rScaleX,
const Kernel& aKernel)
{
// Do horizontal filtering
OSL_ENSURE(rScaleX > 0.0, "Error in scaling: Mirror given in non-mirror-capable method (!)");
const sal_uInt32 nWidth(rSource.GetSizePixel().Width());
const sal_uInt32 nNewWidth(FRound(nWidth * rScaleX));
if(nWidth == nNewWidth)
{
return true;
}
BitmapReadAccess* pReadAcc = rSource.AcquireReadAccess();
if(pReadAcc)
{
double* pWeights = 0;
sal_uInt32* pPixels = 0;
sal_uInt32* pCount = 0;
sal_uInt32 aNumberOfContributions(0);
const sal_uInt32 nHeight(rSource.GetSizePixel().Height());
ImplCalculateContributions(nWidth, nNewWidth, aNumberOfContributions, pWeights, pPixels, pCount, aKernel);
rTarget = Bitmap(Size(nNewWidth, nHeight), 24);
BitmapWriteAccess* pWriteAcc = rTarget.AcquireWriteAccess();
bool bResult(0 != pWriteAcc);
if(bResult)
{
for(sal_uInt32 y(0); y < nHeight; y++)
{
for(sal_uInt32 x(0); x < nNewWidth; x++)
{
const sal_uInt32 aBaseIndex(x * aNumberOfContributions);
double aSum(0.0);
double aValueRed(0.0);
double aValueGreen(0.0);
double aValueBlue(0.0);
for(sal_uInt32 j(0); j < pCount[x]; j++)
{
const sal_uInt32 aIndex(aBaseIndex + j);
const double aWeight(pWeights[aIndex]);
BitmapColor aColor;
aSum += aWeight;
if(pReadAcc->HasPalette())
{
aColor = pReadAcc->GetPaletteColor(pReadAcc->GetPixelIndex(y, pPixels[aIndex]));
}
else
{
aColor = pReadAcc->GetPixel(y, pPixels[aIndex]);
}
aValueRed += aWeight * aColor.GetRed();
aValueGreen += aWeight * aColor.GetGreen();
aValueBlue += aWeight * aColor.GetBlue();
}
const BitmapColor aResultColor(
static_cast< sal_uInt8 >(MinMax(static_cast< sal_Int32 >(aValueRed / aSum), 0, 255)),
static_cast< sal_uInt8 >(MinMax(static_cast< sal_Int32 >(aValueGreen / aSum), 0, 255)),
static_cast< sal_uInt8 >(MinMax(static_cast< sal_Int32 >(aValueBlue / aSum), 0, 255)));
pWriteAcc->SetPixel(y, x, aResultColor);
}
}
rTarget.ReleaseAccess(pWriteAcc);
}
rSource.ReleaseAccess(pReadAcc);
delete[] pWeights;
delete[] pCount;
delete[] pPixels;
if(bResult)
{
return true;
}
}
return false;
}
bool ImplScaleConvolutionVer(
Bitmap& rSource,
Bitmap& rTarget,
const double& rScaleY,
const Kernel& aKernel)
{
// Do vertical filtering
OSL_ENSURE(rScaleY > 0.0, "Error in scaling: Mirror given in non-mirror-capable method (!)");
const sal_uInt32 nHeight(rSource.GetSizePixel().Height());
const sal_uInt32 nNewHeight(FRound(nHeight * rScaleY));
if(nHeight == nNewHeight)
{
return true;
}
BitmapReadAccess* pReadAcc = rSource.AcquireReadAccess();
if(pReadAcc)
{
double* pWeights = 0;
sal_uInt32* pPixels = 0;
sal_uInt32* pCount = 0;
sal_uInt32 aNumberOfContributions(0);
const sal_uInt32 nWidth(rSource.GetSizePixel().Width());
ImplCalculateContributions(nHeight, nNewHeight, aNumberOfContributions, pWeights, pPixels, pCount, aKernel);
rTarget = Bitmap(Size(nWidth, nNewHeight), 24);
BitmapWriteAccess* pWriteAcc = rTarget.AcquireWriteAccess();
bool bResult(0 != pWriteAcc);
if(pWriteAcc)
{
for(sal_uInt32 x(0); x < nWidth; x++)
{
for(sal_uInt32 y(0); y < nNewHeight; y++)
{
const sal_uInt32 aBaseIndex(y * aNumberOfContributions);
double aSum(0.0);
double aValueRed(0.0);
double aValueGreen(0.0);
double aValueBlue(0.0);
for(sal_uInt32 j(0); j < pCount[y]; j++)
{
const sal_uInt32 aIndex(aBaseIndex + j);
const double aWeight(pWeights[aIndex]);
BitmapColor aColor;
aSum += aWeight;
if(pReadAcc->HasPalette())
{
aColor = pReadAcc->GetPaletteColor(pReadAcc->GetPixelIndex(pPixels[aIndex], x));
}
else
{
aColor = pReadAcc->GetPixel(pPixels[aIndex], x);
}
aValueRed += aWeight * aColor.GetRed();
aValueGreen += aWeight * aColor.GetGreen();
aValueBlue += aWeight * aColor.GetBlue();
}
const BitmapColor aResultColor(
static_cast< sal_uInt8 >(MinMax(static_cast< sal_Int32 >(aValueRed / aSum), 0, 255)),
static_cast< sal_uInt8 >(MinMax(static_cast< sal_Int32 >(aValueGreen / aSum), 0, 255)),
static_cast< sal_uInt8 >(MinMax(static_cast< sal_Int32 >(aValueBlue / aSum), 0, 255)));
if(pWriteAcc->HasPalette())
{
pWriteAcc->SetPixelIndex(y, x, static_cast< sal_uInt8 >(pWriteAcc->GetBestPaletteIndex(aResultColor)));
}
else
{
pWriteAcc->SetPixel(y, x, aResultColor);
}
}
}
}
rTarget.ReleaseAccess(pWriteAcc);
rSource.ReleaseAccess(pReadAcc);
delete[] pWeights;
delete[] pCount;
delete[] pPixels;
if(bResult)
{
return true;
}
}
return false;
}
}
// #121233# Added BMP_SCALE_LANCZOS, BMP_SCALE_BICUBIC, BMP_SCALE_BILINEAR and
// BMP_SCALE_BOX derived from the original commit from Tomaž Vajngerl (see
// bugzilla task for deitails) Thanks!
sal_Bool Bitmap::ImplScaleConvolution(
const double& rScaleX,
const double& rScaleY,
const Kernel& aKernel)
{
const bool bMirrorHor(rScaleX < 0.0);
const bool bMirrorVer(rScaleY < 0.0);
const double fScaleX(bMirrorHor ? -rScaleX : rScaleX);
const double fScaleY(bMirrorVer ? -rScaleY : rScaleY);
const sal_uInt32 nWidth(GetSizePixel().Width());
const sal_uInt32 nHeight(GetSizePixel().Height());
const sal_uInt32 nNewWidth(FRound(nWidth * fScaleX));
const sal_uInt32 nNewHeight(FRound(nHeight * fScaleY));
const bool bScaleHor(nWidth != nNewWidth);
const bool bScaleVer(nHeight != nNewHeight);
const bool bMirror(bMirrorHor || bMirrorVer);
if(!bMirror && !bScaleHor && !bScaleVer)
{
return true;
}
bool bResult(true);
sal_uInt32 nMirrorFlags(BMP_MIRROR_NONE);
bool bMirrorAfter(false);
if(bMirror)
{
if(bMirrorHor)
{
nMirrorFlags |= BMP_MIRROR_HORZ;
}
if(bMirrorVer)
{
nMirrorFlags |= BMP_MIRROR_VERT;
}
const sal_uInt32 nStartSize(nWidth * nHeight);
const sal_uInt32 nEndSize(nNewWidth * nNewHeight);
bMirrorAfter = nStartSize > nEndSize;
if(!bMirrorAfter)
{
bResult = Mirror(nMirrorFlags);
}
}
Bitmap aResult;
if(bResult)
{
const sal_uInt32 nInBetweenSizeHorFirst(nHeight * nNewWidth);
const sal_uInt32 nInBetweenSizeVerFirst(nNewHeight * nWidth);
Bitmap aSource(*this);
if(nInBetweenSizeHorFirst < nInBetweenSizeVerFirst)
{
if(bScaleHor)
{
bResult = ImplScaleConvolutionHor(aSource, aResult, fScaleX, aKernel);
}
if(bResult && bScaleVer)
{
if(bScaleHor)
{
// copy partial result, independent of color depth
aSource = aResult;
}
bResult = ImplScaleConvolutionVer(aSource, aResult, fScaleY, aKernel);
}
}
else
{
if(bScaleVer)
{
bResult = ImplScaleConvolutionVer(aSource, aResult, fScaleY, aKernel);
}
if(bResult && bScaleHor)
{
if(bScaleVer)
{
// copy partial result, independent of color depth
aSource = aResult;
}
bResult = ImplScaleConvolutionHor(aSource, aResult, fScaleX, aKernel);
}
}
}
if(bResult && bMirrorAfter)
{
bResult = aResult.Mirror(nMirrorFlags);
}
if(bResult)
{
ImplAdaptBitCount(aResult);
*this = aResult;
}
return bResult;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::Dither( sal_uLong nDitherFlags )
{
sal_Bool bRet = sal_False;
const Size aSizePix( GetSizePixel() );
if( aSizePix.Width() == 1 || aSizePix.Height() == 1 )
bRet = sal_True;
else if( nDitherFlags & BMP_DITHER_MATRIX )
bRet = ImplDitherMatrix();
else if( nDitherFlags & BMP_DITHER_FLOYD )
bRet = ImplDitherFloyd();
else if( ( nDitherFlags & BMP_DITHER_FLOYD_16 ) && ( GetBitCount() == 24 ) )
bRet = ImplDitherFloyd16();
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplDitherMatrix()
{
BitmapReadAccess* pReadAcc = AcquireReadAccess();
Bitmap aNewBmp( GetSizePixel(), 8 );
BitmapWriteAccess* pWriteAcc = aNewBmp.AcquireWriteAccess();
sal_Bool bRet = sal_False;
if( pReadAcc && pWriteAcc )
{
const sal_uLong nWidth = pReadAcc->Width();
const sal_uLong nHeight = pReadAcc->Height();
BitmapColor aIndex( (sal_uInt8) 0 );
if( pReadAcc->HasPalette() )
{
for( sal_uLong nY = 0UL; nY < nHeight; nY++ )
{
for( sal_uLong nX = 0UL, nModY = ( nY & 0x0FUL ) << 4UL; nX < nWidth; nX++ )
{
const BitmapColor aCol( pReadAcc->GetPaletteColor( pReadAcc->GetPixelIndex( nY, nX ) ) );
const sal_uLong nD = nVCLDitherLut[ nModY + ( nX & 0x0FUL ) ];
const sal_uLong nR = ( nVCLLut[ aCol.GetRed() ] + nD ) >> 16UL;
const sal_uLong nG = ( nVCLLut[ aCol.GetGreen() ] + nD ) >> 16UL;
const sal_uLong nB = ( nVCLLut[ aCol.GetBlue() ] + nD ) >> 16UL;
aIndex.SetIndex( (sal_uInt8) ( nVCLRLut[ nR ] + nVCLGLut[ nG ] + nVCLBLut[ nB ] ) );
pWriteAcc->SetPixel( nY, nX, aIndex );
}
}
}
else
{
for( sal_uLong nY = 0UL; nY < nHeight; nY++ )
{
for( sal_uLong nX = 0UL, nModY = ( nY & 0x0FUL ) << 4UL; nX < nWidth; nX++ )
{
const BitmapColor aCol( pReadAcc->GetPixel( nY, nX ) );
const sal_uLong nD = nVCLDitherLut[ nModY + ( nX & 0x0FUL ) ];
const sal_uLong nR = ( nVCLLut[ aCol.GetRed() ] + nD ) >> 16UL;
const sal_uLong nG = ( nVCLLut[ aCol.GetGreen() ] + nD ) >> 16UL;
const sal_uLong nB = ( nVCLLut[ aCol.GetBlue() ] + nD ) >> 16UL;
aIndex.SetIndex( (sal_uInt8) ( nVCLRLut[ nR ] + nVCLGLut[ nG ] + nVCLBLut[ nB ] ) );
pWriteAcc->SetPixel( nY, nX, aIndex );
}
}
}
bRet = sal_True;
}
ReleaseAccess( pReadAcc );
aNewBmp.ReleaseAccess( pWriteAcc );
if( bRet )
{
const MapMode aMap( maPrefMapMode );
const Size aSize( maPrefSize );
*this = aNewBmp;
maPrefMapMode = aMap;
maPrefSize = aSize;
}
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplDitherFloyd()
{
const Size aSize( GetSizePixel() );
sal_Bool bRet = sal_False;
if( ( aSize.Width() > 3 ) && ( aSize.Height() > 2 ) )
{
BitmapReadAccess* pReadAcc = AcquireReadAccess();
Bitmap aNewBmp( GetSizePixel(), 8 );
BitmapWriteAccess* pWriteAcc = aNewBmp.AcquireWriteAccess();
if( pReadAcc && pWriteAcc )
{
BitmapColor aColor;
long nWidth = pReadAcc->Width();
long nWidth1 = nWidth - 1L;
long nHeight = pReadAcc->Height();
long nX;
long nW = nWidth * 3L;
long nW2 = nW - 3L;
long nRErr, nGErr, nBErr;
long nRC, nGC, nBC;
long nTemp;
long nZ;
long* p1 = new long[ nW ];
long* p2 = new long[ nW ];
long* p1T = p1;
long* p2T = p2;
long* pTmp;
sal_Bool bPal = pReadAcc->HasPalette();
pTmp = p2T;
if( bPal )
{
for( nZ = 0; nZ < nWidth; nZ++ )
{
aColor = pReadAcc->GetPaletteColor( pReadAcc->GetPixelIndex( 0, nZ ) );
*pTmp++ = (long) aColor.GetBlue() << 12;
*pTmp++ = (long) aColor.GetGreen() << 12;
*pTmp++ = (long) aColor.GetRed() << 12;
}
}
else
{
for( nZ = 0; nZ < nWidth; nZ++ )
{
aColor = pReadAcc->GetPixel( 0, nZ );
*pTmp++ = (long) aColor.GetBlue() << 12;
*pTmp++ = (long) aColor.GetGreen() << 12;
*pTmp++ = (long) aColor.GetRed() << 12;
}
}
for( long nY = 1, nYAcc = 0L; nY <= nHeight; nY++, nYAcc++ )
{
pTmp = p1T;
p1T = p2T;
p2T = pTmp;
if( nY < nHeight )
{
if( bPal )
{
for( nZ = 0; nZ < nWidth; nZ++ )
{
aColor = pReadAcc->GetPaletteColor( pReadAcc->GetPixelIndex( nY, nZ ) );
*pTmp++ = (long) aColor.GetBlue() << 12;
*pTmp++ = (long) aColor.GetGreen() << 12;
*pTmp++ = (long) aColor.GetRed() << 12;
}
}
else
{
for( nZ = 0; nZ < nWidth; nZ++ )
{
aColor = pReadAcc->GetPixel( nY, nZ );
*pTmp++ = (long) aColor.GetBlue() << 12;
*pTmp++ = (long) aColor.GetGreen() << 12;
*pTmp++ = (long) aColor.GetRed() << 12;
}
}
}
// erstes Pixel gesondert betrachten
nX = 0;
CALC_ERRORS;
CALC_TABLES7;
nX -= 5;
CALC_TABLES5;
pWriteAcc->SetPixelIndex( nYAcc, 0, static_cast<sal_uInt8>(nVCLBLut[ nBC ] + nVCLGLut[nGC ] + nVCLRLut[nRC ]) );
// mittlere Pixel ueber Schleife
long nXAcc;
for ( nX = 3L, nXAcc = 1L; nX < nW2; nXAcc++ )
{
CALC_ERRORS;
CALC_TABLES7;
nX -= 8;
CALC_TABLES3;
CALC_TABLES5;
pWriteAcc->SetPixelIndex( nYAcc, nXAcc, static_cast<sal_uInt8>(nVCLBLut[ nBC ] + nVCLGLut[nGC ] + nVCLRLut[nRC ]) );
}
// letztes Pixel gesondert betrachten
CALC_ERRORS;
nX -= 5;
CALC_TABLES3;
CALC_TABLES5;
pWriteAcc->SetPixelIndex( nYAcc, nWidth1, static_cast<sal_uInt8>(nVCLBLut[ nBC ] + nVCLGLut[nGC ] + nVCLRLut[nRC ]) );
}
delete[] p1;
delete[] p2;
bRet = sal_True;
}
ReleaseAccess( pReadAcc );
aNewBmp.ReleaseAccess( pWriteAcc );
if( bRet )
{
const MapMode aMap( maPrefMapMode );
const Size aPrefSize( maPrefSize );
*this = aNewBmp;
maPrefMapMode = aMap;
maPrefSize = aPrefSize;
}
}
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplDitherFloyd16()
{
BitmapReadAccess* pReadAcc = AcquireReadAccess();
Bitmap aNewBmp( GetSizePixel(), 24 );
BitmapWriteAccess* pWriteAcc = aNewBmp.AcquireWriteAccess();
sal_Bool bRet = sal_False;
if( pReadAcc && pWriteAcc )
{
const long nWidth = pWriteAcc->Width();
const long nWidth1 = nWidth - 1L;
const long nHeight = pWriteAcc->Height();
BitmapColor aColor;
BitmapColor aBestCol;
ImpErrorQuad aErrQuad;
ImpErrorQuad* pErrQuad1 = new ImpErrorQuad[ nWidth ];
ImpErrorQuad* pErrQuad2 = new ImpErrorQuad[ nWidth ];
ImpErrorQuad* pQLine1 = pErrQuad1;
ImpErrorQuad* pQLine2 = 0;
long nX, nY;
long nYTmp = 0L;
sal_Bool bQ1 = sal_True;
for( nY = 0L; nY < Min( nHeight, 2L ); nY++, nYTmp++ )
for( nX = 0L, pQLine2 = !nY ? pErrQuad1 : pErrQuad2; nX < nWidth; nX++ )
pQLine2[ nX ] = pReadAcc->GetPixel( nYTmp, nX );
for( nY = 0L; nY < nHeight; nY++, nYTmp++ )
{
// erstes ZeilenPixel
aBestCol = pQLine1[ 0 ].ImplGetColor();
aBestCol.SetRed( ( aBestCol.GetRed() & 248 ) | 7 );
aBestCol.SetGreen( ( aBestCol.GetGreen() & 248 ) | 7 );
aBestCol.SetBlue( ( aBestCol.GetBlue() & 248 ) | 7 );
pWriteAcc->SetPixel( nY, 0, aBestCol );
for( nX = 1L; nX < nWidth1; nX++ )
{
aColor = pQLine1[ nX ].ImplGetColor();
aBestCol.SetRed( ( aColor.GetRed() & 248 ) | 7 );
aBestCol.SetGreen( ( aColor.GetGreen() & 248 ) | 7 );
aBestCol.SetBlue( ( aColor.GetBlue() & 248 ) | 7 );
aErrQuad = ( ImpErrorQuad( aColor ) -= aBestCol );
pQLine1[ ++nX ].ImplAddColorError7( aErrQuad );
pQLine2[ nX-- ].ImplAddColorError1( aErrQuad );
pQLine2[ nX-- ].ImplAddColorError5( aErrQuad );
pQLine2[ nX++ ].ImplAddColorError3( aErrQuad );
pWriteAcc->SetPixel( nY, nX, aBestCol );
}
// letztes ZeilenPixel
aBestCol = pQLine1[ nWidth1 ].ImplGetColor();
aBestCol.SetRed( ( aBestCol.GetRed() & 248 ) | 7 );
aBestCol.SetGreen( ( aBestCol.GetGreen() & 248 ) | 7 );
aBestCol.SetBlue( ( aBestCol.GetBlue() & 248 ) | 7 );
pWriteAcc->SetPixel( nY, nX, aBestCol );
// Zeilenpuffer neu fuellen/kopieren
pQLine1 = pQLine2;
pQLine2 = ( bQ1 = !bQ1 ) != sal_False ? pErrQuad2 : pErrQuad1;
if( nYTmp < nHeight )
for( nX = 0L; nX < nWidth; nX++ )
pQLine2[ nX ] = pReadAcc->GetPixel( nYTmp, nX );
}
// Zeilenpuffer zerstoeren
delete[] pErrQuad1;
delete[] pErrQuad2;
bRet = sal_True;
}
ReleaseAccess( pReadAcc );
aNewBmp.ReleaseAccess( pWriteAcc );
if( bRet )
{
const MapMode aMap( maPrefMapMode );
const Size aSize( maPrefSize );
*this = aNewBmp;
maPrefMapMode = aMap;
maPrefSize = aSize;
}
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ReduceColors( sal_uInt16 nColorCount, BmpReduce eReduce )
{
sal_Bool bRet;
if( GetColorCount() <= (sal_uLong) nColorCount )
bRet = sal_True;
else if( nColorCount )
{
if( BMP_REDUCE_SIMPLE == eReduce )
bRet = ImplReduceSimple( nColorCount );
else if( BMP_REDUCE_POPULAR == eReduce )
bRet = ImplReducePopular( nColorCount );
else
bRet = ImplReduceMedian( nColorCount );
}
else
bRet = sal_False;
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplReduceSimple( sal_uInt16 nColorCount )
{
Bitmap aNewBmp;
BitmapReadAccess* pRAcc = AcquireReadAccess();
const sal_uInt16 nColCount = Min( nColorCount, (sal_uInt16) 256 );
sal_uInt16 nBitCount;
sal_Bool bRet = sal_False;
if( nColCount <= 2 )
nBitCount = 1;
else if( nColCount <= 16 )
nBitCount = 4;
else
nBitCount = 8;
if( pRAcc )
{
Octree aOct( *pRAcc, nColCount );
const BitmapPalette& rPal = aOct.GetPalette();
BitmapWriteAccess* pWAcc;
aNewBmp = Bitmap( GetSizePixel(), nBitCount, &rPal );
pWAcc = aNewBmp.AcquireWriteAccess();
if( pWAcc )
{
const long nWidth = pRAcc->Width();
const long nHeight = pRAcc->Height();
if( pRAcc->HasPalette() )
{
for( long nY = 0L; nY < nHeight; nY++ )
for( long nX =0L; nX < nWidth; nX++ )
pWAcc->SetPixelIndex( nY, nX, static_cast<sal_uInt8>(aOct.GetBestPaletteIndex( pRAcc->GetPaletteColor( pRAcc->GetPixelIndex( nY, nX ) ))) );
}
else
{
for( long nY = 0L; nY < nHeight; nY++ )
for( long nX =0L; nX < nWidth; nX++ )
pWAcc->SetPixelIndex( nY, nX, static_cast<sal_uInt8>(aOct.GetBestPaletteIndex( pRAcc->GetPixel( nY, nX ) )) );
}
aNewBmp.ReleaseAccess( pWAcc );
bRet = sal_True;
}
ReleaseAccess( pRAcc );
}
if( bRet )
{
const MapMode aMap( maPrefMapMode );
const Size aSize( maPrefSize );
*this = aNewBmp;
maPrefMapMode = aMap;
maPrefSize = aSize;
}
return bRet;
}
// ------------------------------------------------------------------------
struct PopularColorCount
{
sal_uInt32 mnIndex;
sal_uInt32 mnCount;
};
// ------------------------------------------------------------------------
extern "C" int __LOADONCALLAPI ImplPopularCmpFnc( const void* p1, const void* p2 )
{
int nRet;
if( ( (PopularColorCount*) p1 )->mnCount < ( (PopularColorCount*) p2 )->mnCount )
nRet = 1;
else if( ( (PopularColorCount*) p1 )->mnCount == ( (PopularColorCount*) p2 )->mnCount )
nRet = 0;
else
nRet = -1;
return nRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplReducePopular( sal_uInt16 nColCount )
{
BitmapReadAccess* pRAcc = AcquireReadAccess();
sal_uInt16 nBitCount;
sal_Bool bRet = sal_False;
if( nColCount > 256 )
nColCount = 256;
if( nColCount < 17 )
nBitCount = 4;
else
nBitCount = 8;
if( pRAcc )
{
const sal_uInt32 nValidBits = 4;
const sal_uInt32 nRightShiftBits = 8 - nValidBits;
const sal_uInt32 nLeftShiftBits1 = nValidBits;
const sal_uInt32 nLeftShiftBits2 = nValidBits << 1;
const sal_uInt32 nColorsPerComponent = 1 << nValidBits;
const sal_uInt32 nColorOffset = 256 / nColorsPerComponent;
const sal_uInt32 nTotalColors = nColorsPerComponent * nColorsPerComponent * nColorsPerComponent;
const long nWidth = pRAcc->Width();
const long nHeight = pRAcc->Height();
PopularColorCount* pCountTable = new PopularColorCount[ nTotalColors ];
long nX, nY, nR, nG, nB, nIndex;
rtl_zeroMemory( pCountTable, nTotalColors * sizeof( PopularColorCount ) );
for( nR = 0, nIndex = 0; nR < 256; nR += nColorOffset )
{
for( nG = 0; nG < 256; nG += nColorOffset )
{
for( nB = 0; nB < 256; nB += nColorOffset )
{
pCountTable[ nIndex ].mnIndex = nIndex;
nIndex++;
}
}
}
if( pRAcc->HasPalette() )
{
for( nY = 0L; nY < nHeight; nY++ )
{
for( nX = 0L; nX < nWidth; nX++ )
{
const BitmapColor& rCol = pRAcc->GetPaletteColor( pRAcc->GetPixelIndex( nY, nX ) );
pCountTable[ ( ( ( (sal_uInt32) rCol.GetRed() ) >> nRightShiftBits ) << nLeftShiftBits2 ) |
( ( ( (sal_uInt32) rCol.GetGreen() ) >> nRightShiftBits ) << nLeftShiftBits1 ) |
( ( (sal_uInt32) rCol.GetBlue() ) >> nRightShiftBits ) ].mnCount++;
}
}
}
else
{
for( nY = 0L; nY < nHeight; nY++ )
{
for( nX = 0L; nX < nWidth; nX++ )
{
const BitmapColor aCol( pRAcc->GetPixel( nY, nX ) );
pCountTable[ ( ( ( (sal_uInt32) aCol.GetRed() ) >> nRightShiftBits ) << nLeftShiftBits2 ) |
( ( ( (sal_uInt32) aCol.GetGreen() ) >> nRightShiftBits ) << nLeftShiftBits1 ) |
( ( (sal_uInt32) aCol.GetBlue() ) >> nRightShiftBits ) ].mnCount++;
}
}
}
BitmapPalette aNewPal( nColCount );
qsort( pCountTable, nTotalColors, sizeof( PopularColorCount ), ImplPopularCmpFnc );
for( sal_uInt16 n = 0; n < nColCount; n++ )
{
const PopularColorCount& rPop = pCountTable[ n ];
aNewPal[ n ] = BitmapColor( (sal_uInt8) ( ( rPop.mnIndex >> nLeftShiftBits2 ) << nRightShiftBits ),
(sal_uInt8) ( ( ( rPop.mnIndex >> nLeftShiftBits1 ) & ( nColorsPerComponent - 1 ) ) << nRightShiftBits ),
(sal_uInt8) ( ( rPop.mnIndex & ( nColorsPerComponent - 1 ) ) << nRightShiftBits ) );
}
Bitmap aNewBmp( GetSizePixel(), nBitCount, &aNewPal );
BitmapWriteAccess* pWAcc = aNewBmp.AcquireWriteAccess();
if( pWAcc )
{
BitmapColor aDstCol( (sal_uInt8) 0 );
sal_uInt8* pIndexMap = new sal_uInt8[ nTotalColors ];
for( nR = 0, nIndex = 0; nR < 256; nR += nColorOffset )
for( nG = 0; nG < 256; nG += nColorOffset )
for( nB = 0; nB < 256; nB += nColorOffset )
pIndexMap[ nIndex++ ] = (sal_uInt8) aNewPal.GetBestIndex( BitmapColor( (sal_uInt8) nR, (sal_uInt8) nG, (sal_uInt8) nB ) );
if( pRAcc->HasPalette() )
{
for( nY = 0L; nY < nHeight; nY++ )
{
for( nX = 0L; nX < nWidth; nX++ )
{
const BitmapColor& rCol = pRAcc->GetPaletteColor( pRAcc->GetPixelIndex( nY, nX ) );
aDstCol.SetIndex( pIndexMap[ ( ( ( (sal_uInt32) rCol.GetRed() ) >> nRightShiftBits ) << nLeftShiftBits2 ) |
( ( ( (sal_uInt32) rCol.GetGreen() ) >> nRightShiftBits ) << nLeftShiftBits1 ) |
( ( (sal_uInt32) rCol.GetBlue() ) >> nRightShiftBits ) ] );
pWAcc->SetPixel( nY, nX, aDstCol );
}
}
}
else
{
for( nY = 0L; nY < nHeight; nY++ )
{
for( nX = 0L; nX < nWidth; nX++ )
{
const BitmapColor aCol( pRAcc->GetPixel( nY, nX ) );
aDstCol.SetIndex( pIndexMap[ ( ( ( (sal_uInt32) aCol.GetRed() ) >> nRightShiftBits ) << nLeftShiftBits2 ) |
( ( ( (sal_uInt32) aCol.GetGreen() ) >> nRightShiftBits ) << nLeftShiftBits1 ) |
( ( (sal_uInt32) aCol.GetBlue() ) >> nRightShiftBits ) ] );
pWAcc->SetPixel( nY, nX, aDstCol );
}
}
}
delete[] pIndexMap;
aNewBmp.ReleaseAccess( pWAcc );
bRet = sal_True;
}
delete[] pCountTable;
ReleaseAccess( pRAcc );
if( bRet )
{
const MapMode aMap( maPrefMapMode );
const Size aSize( maPrefSize );
*this = aNewBmp;
maPrefMapMode = aMap;
maPrefSize = aSize;
}
}
return bRet;
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::ImplReduceMedian( sal_uInt16 nColCount )
{
BitmapReadAccess* pRAcc = AcquireReadAccess();
sal_uInt16 nBitCount;
sal_Bool bRet = sal_False;
if( nColCount < 17 )
nBitCount = 4;
else if( nColCount < 257 )
nBitCount = 8;
else
{
DBG_ERROR( "Bitmap::ImplReduceMedian(): invalid color count!" );
nBitCount = 8;
nColCount = 256;
}
if( pRAcc )
{
Bitmap aNewBmp( GetSizePixel(), nBitCount );
BitmapWriteAccess* pWAcc = aNewBmp.AcquireWriteAccess();
if( pWAcc )
{
const sal_uLong nSize = 32768UL * sizeof( sal_uLong );
sal_uLong* pColBuf = (sal_uLong*) rtl_allocateMemory( nSize );
const long nWidth = pWAcc->Width();
const long nHeight = pWAcc->Height();
long nIndex = 0L;
memset( (HPBYTE) pColBuf, 0, nSize );
// create Buffer
if( pRAcc->HasPalette() )
{
for( long nY = 0L; nY < nHeight; nY++ )
{
for( long nX = 0L; nX < nWidth; nX++ )
{
const BitmapColor& rCol = pRAcc->GetPaletteColor( pRAcc->GetPixelIndex( nY, nX ) );
pColBuf[ RGB15( rCol.GetRed() >> 3, rCol.GetGreen() >> 3, rCol.GetBlue() >> 3 ) ]++;
}
}
}
else
{
for( long nY = 0L; nY < nHeight; nY++ )
{
for( long nX = 0L; nX < nWidth; nX++ )
{
const BitmapColor aCol( pRAcc->GetPixel( nY, nX ) );
pColBuf[ RGB15( aCol.GetRed() >> 3, aCol.GetGreen() >> 3, aCol.GetBlue() >> 3 ) ]++;
}
}
}
// create palette via median cut
BitmapPalette aPal( pWAcc->GetPaletteEntryCount() );
ImplMedianCut( pColBuf, aPal, 0, 31, 0, 31, 0, 31,
nColCount, nWidth * nHeight, nIndex );
// do mapping of colors to palette
InverseColorMap aMap( aPal );
pWAcc->SetPalette( aPal );
for( long nY = 0L; nY < nHeight; nY++ )
for( long nX = 0L; nX < nWidth; nX++ )
pWAcc->SetPixelIndex( nY, nX, static_cast<sal_uInt8>( aMap.GetBestPaletteIndex( pRAcc->GetColor( nY, nX ) )) );
rtl_freeMemory( pColBuf );
aNewBmp.ReleaseAccess( pWAcc );
bRet = sal_True;
}
ReleaseAccess( pRAcc );
if( bRet )
{
const MapMode aMap( maPrefMapMode );
const Size aSize( maPrefSize );
*this = aNewBmp;
maPrefMapMode = aMap;
maPrefSize = aSize;
}
}
return bRet;
}
// ------------------------------------------------------------------------
void Bitmap::ImplMedianCut( sal_uLong* pColBuf, BitmapPalette& rPal,
long nR1, long nR2, long nG1, long nG2, long nB1, long nB2,
long nColors, long nPixels, long& rIndex )
{
if( !nPixels )
return;
BitmapColor aCol;
const long nRLen = nR2 - nR1;
const long nGLen = nG2 - nG1;
const long nBLen = nB2 - nB1;
long nR, nG, nB;
sal_uLong* pBuf = pColBuf;
if( !nRLen && !nGLen && !nBLen )
{
if( pBuf[ RGB15( nR1, nG1, nB1 ) ] )
{
aCol.SetRed( (sal_uInt8) ( nR1 << 3 ) );
aCol.SetGreen( (sal_uInt8) ( nG1 << 3 ) );
aCol.SetBlue( (sal_uInt8) ( nB1 << 3 ) );
rPal[ (sal_uInt16) rIndex++ ] = aCol;
}
}
else
{
if( 1 == nColors || 1 == nPixels )
{
long nPixSum = 0, nRSum = 0, nGSum = 0, nBSum = 0;
for( nR = nR1; nR <= nR2; nR++ )
{
for( nG = nG1; nG <= nG2; nG++ )
{
for( nB = nB1; nB <= nB2; nB++ )
{
nPixSum = pBuf[ RGB15( nR, nG, nB ) ];
if( nPixSum )
{
nRSum += nR * nPixSum;
nGSum += nG * nPixSum;
nBSum += nB * nPixSum;
}
}
}
}
aCol.SetRed( (sal_uInt8) ( ( nRSum / nPixels ) << 3 ) );
aCol.SetGreen( (sal_uInt8) ( ( nGSum / nPixels ) << 3 ) );
aCol.SetBlue( (sal_uInt8) ( ( nBSum / nPixels ) << 3 ) );
rPal[ (sal_uInt16) rIndex++ ] = aCol;
}
else
{
const long nTest = ( nPixels >> 1 );
long nPixOld = 0;
long nPixNew = 0;
if( nBLen > nGLen && nBLen > nRLen )
{
nB = nB1 - 1;
while( nPixNew < nTest )
{
nB++, nPixOld = nPixNew;
for( nR = nR1; nR <= nR2; nR++ )
for( nG = nG1; nG <= nG2; nG++ )
nPixNew += pBuf[ RGB15( nR, nG, nB ) ];
}
if( nB < nB2 )
{
ImplMedianCut( pBuf, rPal, nR1, nR2, nG1, nG2, nB1, nB, nColors >> 1, nPixNew, rIndex );
ImplMedianCut( pBuf, rPal, nR1, nR2, nG1, nG2, nB + 1, nB2, nColors >> 1, nPixels - nPixNew, rIndex );
}
else
{
ImplMedianCut( pBuf, rPal, nR1, nR2, nG1, nG2, nB1, nB - 1, nColors >> 1, nPixOld, rIndex );
ImplMedianCut( pBuf, rPal, nR1, nR2, nG1, nG2, nB, nB2, nColors >> 1, nPixels - nPixOld, rIndex );
}
}
else if( nGLen > nRLen )
{
nG = nG1 - 1;
while( nPixNew < nTest )
{
nG++, nPixOld = nPixNew;
for( nR = nR1; nR <= nR2; nR++ )
for( nB = nB1; nB <= nB2; nB++ )
nPixNew += pBuf[ RGB15( nR, nG, nB ) ];
}
if( nG < nG2 )
{
ImplMedianCut( pBuf, rPal, nR1, nR2, nG1, nG, nB1, nB2, nColors >> 1, nPixNew, rIndex );
ImplMedianCut( pBuf, rPal, nR1, nR2, nG + 1, nG2, nB1, nB2, nColors >> 1, nPixels - nPixNew, rIndex );
}
else
{
ImplMedianCut( pBuf, rPal, nR1, nR2, nG1, nG - 1, nB1, nB2, nColors >> 1, nPixOld, rIndex );
ImplMedianCut( pBuf, rPal, nR1, nR2, nG, nG2, nB1, nB2, nColors >> 1, nPixels - nPixOld, rIndex );
}
}
else
{
nR = nR1 - 1;
while( nPixNew < nTest )
{
nR++, nPixOld = nPixNew;
for( nG = nG1; nG <= nG2; nG++ )
for( nB = nB1; nB <= nB2; nB++ )
nPixNew += pBuf[ RGB15( nR, nG, nB ) ];
}
if( nR < nR2 )
{
ImplMedianCut( pBuf, rPal, nR1, nR, nG1, nG2, nB1, nB2, nColors >> 1, nPixNew, rIndex );
ImplMedianCut( pBuf, rPal, nR1 + 1, nR2, nG1, nG2, nB1, nB2, nColors >> 1, nPixels - nPixNew, rIndex );
}
else
{
ImplMedianCut( pBuf, rPal, nR1, nR - 1, nG1, nG2, nB1, nB2, nColors >> 1, nPixOld, rIndex );
ImplMedianCut( pBuf, rPal, nR, nR2, nG1, nG2, nB1, nB2, nColors >> 1, nPixels - nPixOld, rIndex );
}
}
}
}
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::Vectorize( PolyPolygon& rPolyPoly, sal_uLong nFlags, const Link* pProgress )
{
return ImplVectorizer().ImplVectorize( *this, rPolyPoly, nFlags, pProgress );
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::Vectorize( GDIMetaFile& rMtf, sal_uInt8 cReduce, sal_uLong nFlags, const Link* pProgress )
{
return ImplVectorizer().ImplVectorize( *this, rMtf, cReduce, nFlags, pProgress );
}
// ------------------------------------------------------------------------
sal_Bool Bitmap::Adjust( short nLuminancePercent, short nContrastPercent,
short nChannelRPercent, short nChannelGPercent, short nChannelBPercent,
double fGamma, sal_Bool bInvert )
{
sal_Bool bRet = sal_False;
// nothing to do => return quickly
if( !nLuminancePercent && !nContrastPercent &&
!nChannelRPercent && !nChannelGPercent && !nChannelBPercent &&
( fGamma == 1.0 ) && !bInvert )
{
bRet = sal_True;
}
else
{
BitmapWriteAccess* pAcc = AcquireWriteAccess();
if( pAcc )
{
BitmapColor aCol;
const long nW = pAcc->Width();
const long nH = pAcc->Height();
sal_uInt8* cMapR = new sal_uInt8[ 256 ];
sal_uInt8* cMapG = new sal_uInt8[ 256 ];
sal_uInt8* cMapB = new sal_uInt8[ 256 ];
long nX, nY;
double fM, fROff, fGOff, fBOff, fOff;
// calculate slope
if( nContrastPercent >= 0 )
fM = 128.0 / ( 128.0 - 1.27 * MinMax( nContrastPercent, 0L, 100L ) );
else
fM = ( 128.0 + 1.27 * MinMax( nContrastPercent, -100L, 0L ) ) / 128.0;
// total offset = luminance offset + contrast offset
fOff = MinMax( nLuminancePercent, -100L, 100L ) * 2.55 + 128.0 - fM * 128.0;
// channel offset = channel offset + total offset
fROff = nChannelRPercent * 2.55 + fOff;
fGOff = nChannelGPercent * 2.55 + fOff;
fBOff = nChannelBPercent * 2.55 + fOff;
// calculate gamma value
fGamma = ( fGamma <= 0.0 || fGamma > 10.0 ) ? 1.0 : ( 1.0 / fGamma );
const sal_Bool bGamma = ( fGamma != 1.0 );
// create mapping table
for( nX = 0L; nX < 256L; nX++ )
{
cMapR[ nX ] = (sal_uInt8) MinMax( FRound( nX * fM + fROff ), 0L, 255L );
cMapG[ nX ] = (sal_uInt8) MinMax( FRound( nX * fM + fGOff ), 0L, 255L );
cMapB[ nX ] = (sal_uInt8) MinMax( FRound( nX * fM + fBOff ), 0L, 255L );
if( bGamma )
{
cMapR[ nX ] = GAMMA( cMapR[ nX ], fGamma );
cMapG[ nX ] = GAMMA( cMapG[ nX ], fGamma );
cMapB[ nX ] = GAMMA( cMapB[ nX ], fGamma );
}
if( bInvert )
{
cMapR[ nX ] = ~cMapR[ nX ];
cMapG[ nX ] = ~cMapG[ nX ];
cMapB[ nX ] = ~cMapB[ nX ];
}
}
// do modifying
if( pAcc->HasPalette() )
{
BitmapColor aNewCol;
for( sal_uInt16 i = 0, nCount = pAcc->GetPaletteEntryCount(); i < nCount; i++ )
{
const BitmapColor& rCol = pAcc->GetPaletteColor( i );
aNewCol.SetRed( cMapR[ rCol.GetRed() ] );
aNewCol.SetGreen( cMapG[ rCol.GetGreen() ] );
aNewCol.SetBlue( cMapB[ rCol.GetBlue() ] );
pAcc->SetPaletteColor( i, aNewCol );
}
}
else if( pAcc->GetScanlineFormat() == BMP_FORMAT_24BIT_TC_BGR )
{
for( nY = 0L; nY < nH; nY++ )
{
Scanline pScan = pAcc->GetScanline( nY );
for( nX = 0L; nX < nW; nX++ )
{
*pScan = cMapB[ *pScan ]; pScan++;
*pScan = cMapG[ *pScan ]; pScan++;
*pScan = cMapR[ *pScan ]; pScan++;
}
}
}
else if( pAcc->GetScanlineFormat() == BMP_FORMAT_24BIT_TC_RGB )
{
for( nY = 0L; nY < nH; nY++ )
{
Scanline pScan = pAcc->GetScanline( nY );
for( nX = 0L; nX < nW; nX++ )
{
*pScan = cMapR[ *pScan ]; pScan++;
*pScan = cMapG[ *pScan ]; pScan++;
*pScan = cMapB[ *pScan ]; pScan++;
}
}
}
else
{
for( nY = 0L; nY < nH; nY++ )
{
for( nX = 0L; nX < nW; nX++ )
{
aCol = pAcc->GetPixel( nY, nX );
aCol.SetRed( cMapR[ aCol.GetRed() ] );
aCol.SetGreen( cMapG[ aCol.GetGreen() ] );
aCol.SetBlue( cMapB[ aCol.GetBlue() ] );
pAcc->SetPixel( nY, nX, aCol );
}
}
}
delete[] cMapR;
delete[] cMapG;
delete[] cMapB;
ReleaseAccess( pAcc );
bRet = sal_True;
}
}
return bRet;
}