--- a/htiui/HtiServicePlugins/HtiScreenshotServicePlugin/src/HtiTextRcg.cpp Thu Jun 24 14:55:55 2010 +0300
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,955 +0,0 @@
-/*
-* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
-* All rights reserved.
-* This component and the accompanying materials are made available
-* under the terms of "Eclipse Public License v1.0"
-* which accompanies this distribution, and is available
-* at the URL "http://www.eclipse.org/legal/epl-v10.html".
-*
-* Initial Contributors:
-* Nokia Corporation - initial contribution.
-*
-* Contributors:
-*
-* Description: Text recognition algorithm implementation.
-*
-*/
-
-
-#include "HtiTextRcg.h"
-#include <HtiLogging.h>
-
-const static TInt KDefaultStrategy = EHintEdge;
-
-TInt CompareTPoint(const TPoint& aP1,const TPoint& aP2)
- {
- //this functions is used only to avoid equal points when creating FGA or BGA
- //so only equality of points is important, order doesnt matter
- if ( aP1.iY == aP2.iY )
- return aP1.iX - aP2.iX;
- return aP1.iY - aP2.iY;
- }
-
-CHtiTextRcg::CHtiTextRcg()
- {
- iAvgDiffMin = KDefaultAvgDiffMin;
- //minimal SS for foreground, with plain color should be 0
- iFgSSMin = KDefaultFgSSMin;
- iFgAvgDiffMin = KDefaultFgAvgDiffMin;
-
- iFGAAmount = KDefaultFGAAmount;
- iBGAAmount = KDefaultBGAAmount;
-
- SetHint(KDefaultStrategy);
- }
-
-CHtiTextRcg::~CHtiTextRcg()
- {
- iFGASet.Close();
- iBGASet.Close();
- }
-
-void CHtiTextRcg::SetHint(TInt aHint)
- {
- //selects strategy and algorithm parameters
- switch ( aHint )
- {
- case EHintEdge:
- {
- //AA strategy
- iCurrentStrategy = EHintEdge;
- }
- break;
- case EHintNone:
- default:
- {
- //default strategy
- iCurrentStrategy = EHintNone;
- }
- }
- }
-
-
-TBool CHtiTextRcg::RecognizeTextL(CFbsBitmap* aScreenshot,
- const TDesC& aText,
- const CFont* aFont,
- TRect& aResult)
- {
-HTI_LOG_FUNC_IN("RecognizeTextL");
- TInt returnValue = KWorstCase;
-
- CFbsBitmap* gray = ColorDownL(aScreenshot);
- CleanupStack::PushL(gray);
-
- switch ( iCurrentStrategy )
- {
- case EHintEdge:
- {
- returnValue = RecognizeAAL(gray,aText, aFont, aResult);
- }
- break;
- case EHintNone:
- default:
- {
- returnValue = RecognizeBinL(gray,aText, aFont, aResult);
- }
- }
-
- CleanupStack::PopAndDestroy(gray);
-HTI_LOG_FUNC_OUT("RecognizeTextL");
- return returnValue < KSuccessThresold;
- }
-
-TInt CHtiTextRcg::RecognizeBinL(CFbsBitmap* aScreenshot,
- const TDesC& aText,
- const CFont* aFont,
- TRect& aResult)
-{
- HTI_LOG_FUNC_IN("RecognizeBinL");
- CFbsBitmap* searchFirstLetter = GetTextBitmapL(aText, aFont, 1);
- CleanupStack::PushL(searchFirstLetter);
- HTI_LOG_FORMAT("pattern size w %d", searchFirstLetter->SizeInPixels().iWidth);
- HTI_LOG_FORMAT("pattern size h %d", searchFirstLetter->SizeInPixels().iHeight);
-
- if ( !AnalyzePatternL(searchFirstLetter) )
- {
- CleanupStack::PopAndDestroy(searchFirstLetter);
- return KWorstCase;
- }
- CFbsBitmap* searchText = GetTextBitmapL(aText, aFont);
- CleanupStack::PushL(searchText);
-
- //search range (0,0) - (reg.Size() - searchText.SizeInPixels)
- TPoint end(aScreenshot->SizeInPixels().iWidth, aScreenshot->SizeInPixels().iHeight);
- end -= searchText->SizeInPixels();
- end += TPoint(1,1);
-
- //search itself
- for ( TPoint p( 0, 0 ); p.iY < end.iY; p.iY++ )
- {
- for ( p.iX = 0; p.iX < end.iX; p.iX++ )
- {
- TInt t = ImageDiffBinSampleL(aScreenshot, p, searchFirstLetter);
- if ( t == 0 )
- {
- //check full word
- TInt wordD = ImageDiffBinFullL(aScreenshot, p, searchText);
- if ( wordD == 0 )
- {
- aResult.iTl.iX = p.iX;
- aResult.iTl.iY = p.iY;
- aResult.SetSize(searchText->SizeInPixels());
- CleanupStack::PopAndDestroy(searchText);
- CleanupStack::PopAndDestroy(searchFirstLetter);
- HTI_LOG_FUNC_OUT("RecognizeBinL");
- return 0;
- }
- }
- }
- }
- CleanupStack::PopAndDestroy(searchText);
- CleanupStack::PopAndDestroy(searchFirstLetter);
-
- HTI_LOG_FUNC_OUT("RecognizeBinL");
- return KWorstCase;
-}
-
-
-TInt CHtiTextRcg::RecognizeAAL(CFbsBitmap* aScreenshot,
- const TDesC& aText,
- const CFont* aFont,
- TRect& aResult)
-{
- HTI_LOG_FUNC_IN("RecognizeAAL");
- CFbsBitmap* searchFirstLetter = GetTextBitmapL(aText, aFont, 1);
- CleanupStack::PushL(searchFirstLetter);
- if ( !AnalyzePatternL(searchFirstLetter) )
- {
- CleanupStack::PopAndDestroy(searchFirstLetter);
- return KWorstCase;
- }
-
- CFbsBitmap* searchText = GetTextBitmapL(aText, aFont);
- CleanupStack::PushL(searchText);
-
-
- //search range (0,0) - (reg.Size() - searchText.SizeInPixels)
- TPoint end(aScreenshot->SizeInPixels().iWidth, aScreenshot->SizeInPixels().iHeight);
- end -= searchText->SizeInPixels();
- end += TPoint(1,1);
-
- //search itself
- TInt min = KSuccessThresold;
- TInt wordMin = KSuccessThresold;
-
- for ( TPoint p( 0, 0 ); p.iY < end.iY; p.iY++ )
- {
- for ( p.iX = 0; p.iX < end.iX; p.iX++ )
- {
- TInt t = ImageDiffAASampleL(aScreenshot, p, searchFirstLetter);
- if ( t < min )
- {
- //check full word
- TInt wordD = ImageDiffAAFullL(aScreenshot, p, searchText);
- if ( wordD < wordMin )
- {
- wordMin = wordD;
- min = t;
- aResult.iTl.iX = p.iX;
- aResult.iTl.iY = p.iY;
- aResult.SetSize(searchText->SizeInPixels());
- if ( wordMin == 0 )
- {
- CleanupStack::PopAndDestroy(searchText);
- CleanupStack::PopAndDestroy(searchFirstLetter);
- HTI_LOG_FUNC_OUT("RecognizeAAL");
- return 0;
- }
- }
- }
- }
- }
-
- CleanupStack::PopAndDestroy(searchText);
- CleanupStack::PopAndDestroy(searchFirstLetter);
-
- HTI_LOG_FUNC_OUT("RecognizeAAL");
-
- return wordMin;
-}
-
-TBool CHtiTextRcg::AnalyzePatternL(CFbsBitmap * aPattern)
-{
- HTI_LOG_FUNC_IN("AnalyzePatternL");
- if ( aPattern->SizeInPixels().iWidth == 0 ||
- aPattern->SizeInPixels().iHeight == 0 )
- {
- return EFalse;
- }
- //points are selected as follow
- //take pair of FG-BG points which located next to each other
- MinMax(aPattern,
- iMaskFgColor, //min, black font
- iMaskBgColor);//max, white bg
-
- if ( iMaskFgColor == iMaskBgColor ) //pattern is empty
- {
- return EFalse;
- }
-
- TLinearOrder<TPoint> pointOrder(CompareTPoint);
- TSize borders = aPattern->SizeInPixels();
- iFGASet.Reset();
- iBGASet.Reset();
-
- TBitmapUtil bmpIterator(aPattern);
- //lock bitmap
- bmpIterator.Begin( TPoint(0,0));
-
- //first take center lines and find take at least two pairs
- //vertical1
- TPoint startPoint(borders.iWidth/2, 0);
- bmpIterator.SetPos(startPoint);
-
- TInt lastColor = bmpIterator.GetPixel()&0xff;
- TInt lastColorPos = 0;
- bmpIterator.IncYPos();
- TInt i=1;
- TInt found = 0;
-
- while ( found < 2 && i < borders.iHeight )
- {
- TInt c = bmpIterator.GetPixel()&0xff;
-
- if ( lastColor != c )
- {
- if ( c == iMaskFgColor )
- {
- iFGASet.InsertInOrder(TPoint(startPoint.iX, i), pointOrder);
- iBGASet.InsertInOrder(TPoint(startPoint.iX, lastColorPos), pointOrder);
- lastColor = c;
- lastColorPos = i;
- ++found;
- }
- else if ( c == iMaskBgColor )
- {
- iBGASet.InsertInOrder(TPoint(startPoint.iX, i), pointOrder);
- iFGASet.InsertInOrder(TPoint(startPoint.iX, lastColorPos), pointOrder);
- lastColor = c;
- lastColorPos = i;
- ++found;
- }
- }
- else
- {
- lastColorPos = i;
- }
-
- ++i;
- bmpIterator.IncYPos();
- }
-
- //horizontal1
- startPoint.SetXY(0,borders.iHeight/2);
- bmpIterator.SetPos(startPoint);
- lastColor = bmpIterator.GetPixel()&0xff;
- bmpIterator.IncXPos();
- i=1;
- found = 0;
- lastColorPos = 0;
-
- while ( found < 2 && i < borders.iWidth )
- {
- TInt c = bmpIterator.GetPixel()&0xff;
-
- if ( lastColor != c )
- {
- if ( c == iMaskFgColor )
- {
- iFGASet.InsertInOrder(TPoint(i, startPoint.iY), pointOrder);
- iBGASet.InsertInOrder(TPoint(lastColorPos, startPoint.iY), pointOrder);
- lastColor = c;
- lastColorPos = i;
- ++found;
- }
- else if ( c == iMaskBgColor )
- {
- iBGASet.InsertInOrder(TPoint(i, startPoint.iY), pointOrder);
- iFGASet.InsertInOrder(TPoint(lastColorPos, startPoint.iY), pointOrder);
- lastColor = c;
- lastColorPos = i;
- ++found;
- }
- }
- else
- {
- lastColorPos = i;
- }
- ++i;
- bmpIterator.IncXPos();
- }
-
- //unlock bitmap
- bmpIterator.End();
-
- iFGAAmount = iFGASet.Count();
- iBGAAmount = iBGASet.Count();
-
- HTI_LOG_FUNC_OUT("AnalyzePatternL");
- return ETrue;
-
-}
-
-TInt CHtiTextRcg::ImageDiffAASampleL(CFbsBitmap * aBitmap1, TPoint aOrigin1,
- CFbsBitmap * aBitmap2)
- {
-
- if (iFGASet.Count()==0 || iBGASet.Count()==0)
- return KWorstCase;
-
- TSize aSize = aBitmap2->SizeInPixels();
-
- //straight average difference
- TBitmapUtil bmpIterator1(aBitmap1);
- TBitmapUtil bmpIterator2(aBitmap2);
-
- bmpIterator1.Begin( aOrigin1 );
-
- //1. check FGA points are equal
- bmpIterator1.SetPos( aOrigin1 + iFGASet[0]);
- iTestFgColor = bmpIterator1.GetPixel()&0xff;
-
- for ( TInt i = 1; i < iFGAAmount;++i )
- {
- bmpIterator1.SetPos( aOrigin1 + iFGASet[i]);
- TInt c = bmpIterator1.GetPixel()&0xff;
- if ( Abs(c-iTestFgColor) > iFgAvgDiffMin )
- {
- bmpIterator2.End();
- bmpIterator1.End();
- return KWorstCase;
- }
- }
- // if we are here all FGA points are equal to colorFGA
- //2. check that avg BGA point value is not equal to colorFGA
- iTestBgColor = 0;
- for ( TInt i = 0; i < iBGAAmount; ++i )
- {
- bmpIterator1.SetPos( aOrigin1 + iBGASet[i]);
- iTestBgColor += bmpIterator1.GetPixel()&0xff;
- }
- iTestBgColor /= iBGAAmount;
- //if difference is too small leave with false
- if ( Abs(iTestBgColor-iTestFgColor) < iAvgDiffMin )
- {
- bmpIterator2.End();
- bmpIterator1.End();
- return KWorstCase;
- }
-
- //all checking based on FGA and BGA are correct, chance to have match
- //3. calculate sum of diff between colorFGA and ALL FG points
- bmpIterator1.End();
- bmpIterator1.Begin( aOrigin1 );
- bmpIterator2.Begin( TPoint(0,0), bmpIterator1 );
-
- TInt nofF = 0;
- TInt sum = 0;
- TBool iterFlag = EFalse;
-
- TInt rowDelta = 2;
- TInt columnDelta = 1;
-
- TBool intellFlagBG;
- iTestNormCoef = (Abs(iMaskFgColor-iMaskBgColor)<<KNormCoefAcc)/Abs(iTestFgColor-iTestBgColor);
-
- for ( TInt i = 0; i < aSize.iHeight; i += rowDelta )
- {
- intellFlagBG = EFalse;
- for ( TInt j = 0; j < aSize.iWidth; j += columnDelta )
- {
- TInt c1 = (bmpIterator1.GetPixel())&0xff;
- TInt c2 = (bmpIterator2.GetPixel())&0xff;
-
- if ( c2 != iMaskBgColor ) // if foreground
- {
- if ( c2 == iMaskFgColor ) //should be "pure" FG
- {
- if ( Abs( c1 - iTestFgColor ) > iFgAvgDiffMin )
- {
- bmpIterator2.End();
- bmpIterator1.End();
- return KWorstCase;
- }
- intellFlagBG = ETrue;
- }
- else if ( intellFlagBG ) // AA pixels
- {
- //calculate diff. in relative diff in aa pixel
- //in mask and searh image
- //based on assumtion that aa pixels color
- // relative to fg color should correlate
- TInt normD = (Abs(c1-iTestFgColor)*iTestNormCoef)>>KNormCoefAcc;
- sum += Abs(Abs(iMaskFgColor-c2) - normD );
-
- ++nofF;
- intellFlagBG = EFalse;
-
- }
- }
- for ( TInt l = 0; l < columnDelta; l++ )
- {
- if ( iterFlag )
- {
- bmpIterator1.DecXPos();
- bmpIterator2.DecXPos();
- }
- else
- {
- bmpIterator1.IncXPos();
- bmpIterator2.IncXPos();
- }
- }
- }
-
- for ( int k = 0; k < rowDelta; k++ )
- {
- bmpIterator1.IncYPos();
- bmpIterator2.IncYPos();
- }
- for ( int l = 0; l < columnDelta; l++ )
- {
- if ( iterFlag )
- {
- bmpIterator1.IncXPos();
- bmpIterator2.IncXPos();
- }
- else
- {
- bmpIterator1.DecXPos();
- bmpIterator2.DecXPos();
- }
- }
- iterFlag = !iterFlag;
- }
-
-
- bmpIterator2.End();
- bmpIterator1.End();
-
- if ( nofF == 0 )
- {
- return 0;
- }
- return sum / nofF;
- }
-
-
-TInt CHtiTextRcg::ImageDiffAAFullL(CFbsBitmap * aBitmap1, TPoint aOrigin1,
- CFbsBitmap * aBitmap2)
- {
- TSize aSize = aBitmap2->SizeInPixels();
- //straight average difference
- TBitmapUtil bmpIterator1(aBitmap1);
- TBitmapUtil bmpIterator2(aBitmap2);
-
- bmpIterator1.Begin( aOrigin1 );
- bmpIterator2.Begin( TPoint(0,0), bmpIterator1 );
-
- TInt nofF = 0;
- TInt sumF = 0;
- TBool intellFlagBG;
- TBool iterFlag = EFalse;
- TInt rowDelta = 2;
- TInt columnDelta = 1;
-
- for ( TInt i = 0; i < aSize.iHeight; i += rowDelta )
- {
- intellFlagBG = EFalse;
- for ( TInt j = 0; j < aSize.iWidth; j += columnDelta )
- {
- TInt c1 = ( bmpIterator1.GetPixel() ) & 0xff;
- TInt c2 = ( bmpIterator2.GetPixel() ) & 0xff;
-
- if ( c2 != iMaskBgColor ) // if foreground
- {
- if ( c2 == iMaskFgColor ) //should be pure FG
- {
- if ( Abs(c1 - iTestFgColor) > iFgAvgDiffMin )
- {
- bmpIterator2.End();
- bmpIterator1.End();
- return KWorstCase;
- }
- intellFlagBG = ETrue;
- }
- else if ( intellFlagBG ) // AA pixels
- {
- //calculate diff. in relative diff in aa pixel
- //in mask and searh image
- //based on assumtion that aa pixels color
- // relative to fg color should correlate
- TInt normD = (Abs(c1-iTestFgColor)*iTestNormCoef)>>KNormCoefAcc;
- sumF += Abs(Abs(iMaskFgColor-c2) - normD );
-
- ++nofF;
- intellFlagBG = EFalse;
- }
- }
- for ( TInt l = 0; l < columnDelta; l++ )
- {
- if ( iterFlag )
- {
- bmpIterator1.DecXPos();
- bmpIterator2.DecXPos();
- }
- else
- {
- bmpIterator1.IncXPos();
- bmpIterator2.IncXPos();
- }
- }
- }
-
- for ( TInt k = 0; k < rowDelta; k++ )
- {
- bmpIterator1.IncYPos();
- bmpIterator2.IncYPos();
- }
- for ( TInt l = 0; l < columnDelta; l++ )
- {
- if ( iterFlag )
- {
- bmpIterator1.IncXPos();
- bmpIterator2.IncXPos();
- }
- else
- {
- bmpIterator1.DecXPos();
- bmpIterator2.DecXPos();
- }
- }
- iterFlag = !iterFlag;
- }
- bmpIterator2.End();
- bmpIterator1.End();
-
- if ( nofF == 0 )
- return 0;
-
- return sumF/nofF;
- }
-
-TInt CHtiTextRcg::ImageDiffBinSampleL(CFbsBitmap * aBitmap1, TPoint aOrigin1,
- CFbsBitmap * aBitmap2)
- {
- TSize aSize = aBitmap2->SizeInPixels();
- if ( iFGASet.Count() == 0 || iBGASet.Count() == 0 )
- return KWorstCase;
-
- //straight average difference
- TBitmapUtil bmpIterator1(aBitmap1);
- TBitmapUtil bmpIterator2(aBitmap2);
-
- bmpIterator1.Begin( aOrigin1 );
-
- //1. check FGA points are equal
- bmpIterator1.SetPos( aOrigin1 + iFGASet[0]);
- TInt colorFGA = bmpIterator1.GetPixel()&0xff;
-
- for ( TInt i = 1; i < iFGAAmount; ++i )
- {
- bmpIterator1.SetPos( aOrigin1 + iFGASet[i] );
- TInt c = bmpIterator1.GetPixel()&0xff;
- if ( c != colorFGA )
- {
- bmpIterator2.End();
- bmpIterator1.End();
- return KWorstCase;
- }
- }
- // if we are here all FGA points are equal to colorFGA
- //2. check that avg BGA point value is not equal to colorFGA
- TInt avgColorBGA = 0;
- for ( TInt i = 0; i < iBGAAmount; ++i )
- {
- bmpIterator1.SetPos( aOrigin1 + iBGASet[i] );
- avgColorBGA += bmpIterator1.GetPixel() & 0xff;
- }
- avgColorBGA /= iBGAAmount;
- //if difference is too small leave with false
- if ( Abs(avgColorBGA-colorFGA) < iAvgDiffMin )
- {
- bmpIterator2.End();
- bmpIterator1.End();
- return KWorstCase;
- }
-
- //all checking based on FGA and BGA are correct, chance to have math
- //3. calculate sum of diff between colorFGA and ALL FG points
- bmpIterator1.End();
- bmpIterator1.Begin( aOrigin1 );
- bmpIterator2.Begin( TPoint(0,0), bmpIterator1 );
-
- TBool iterFlag = EFalse;
-
- TInt rowDelta = 1;
- TInt columnDelta = 1;
-
- for ( TInt i = 0; i < aSize.iHeight; i += rowDelta )
- {
- for ( TInt j = 0; j < aSize.iWidth; j += columnDelta )
- {
- TInt c1 = ( bmpIterator1.GetPixel() ) & 0xff;
- TInt c2 = ( bmpIterator2.GetPixel() ) & 0xff;
-
- if ( c2 == iMaskFgColor ) // if foreground
- {
- if ( colorFGA != c1 )
- {
- bmpIterator2.End();
- bmpIterator1.End();
- return KWorstCase;
- }
- }
- for ( TInt l = 0; l < columnDelta; l++ )
- {
- if ( iterFlag )
- {
- bmpIterator1.DecXPos();
- bmpIterator2.DecXPos();
- }
- else
- {
- bmpIterator1.IncXPos();
- bmpIterator2.IncXPos();
- }
- }
- }
-
- for ( TInt k = 0; k < rowDelta; k++ )
- {
- bmpIterator1.IncYPos();
- bmpIterator2.IncYPos();
- }
- for ( TInt l = 0; l < columnDelta; l++ )
- {
- if ( iterFlag )
- {
- bmpIterator1.IncXPos();
- bmpIterator2.IncXPos();
- }
- else
- {
- bmpIterator1.DecXPos();
- bmpIterator2.DecXPos();
- }
- }
- iterFlag = !iterFlag;
- }
-
-
- bmpIterator2.End();
- bmpIterator1.End();
-
- return 0;
- }
-
-TInt CHtiTextRcg::ImageDiffBinFullL(CFbsBitmap * aBitmap1, TPoint aOrigin1,
- CFbsBitmap * aBitmap2)
- {
- TSize aSize = aBitmap2->SizeInPixels();
- //straight average difference
- TBitmapUtil bmpIterator1(aBitmap1);
- TBitmapUtil bmpIterator2(aBitmap2);
-
- bmpIterator1.Begin( aOrigin1 );
- bmpIterator2.Begin( TPoint(0,0), bmpIterator1 );
-
- //TInt nofF = 0;
- TInt nofB = 0;
-
- TInt sumB = 0;
- //TInt sumF = 0;
- TBool intellFlagBG;
- TBool iterFlag = EFalse;
- TInt rowDelta = 1;
- TInt columnDelta = 1;
- TInt fgColor = -1;
- for ( TInt i = 0; i < aSize.iHeight; i += rowDelta )
- {
- intellFlagBG = EFalse;
- for ( TInt j = 0; j < aSize.iWidth; j += columnDelta )
- {
- TInt c1 = ( bmpIterator1.GetPixel() ) & 0xff;
- TInt c2 = ( bmpIterator2.GetPixel() ) & 0xff;
-
- if ( c2 == iMaskFgColor ) // if FG
- {
- if ( c1 != fgColor )
- {
- if ( fgColor != -1 )
- {
- //failed
- bmpIterator2.End();
- bmpIterator1.End();
- return KWorstCase;
- }
- else
- {
- fgColor = c1; //init fgColor
- }
- }
- intellFlagBG = ETrue;
- }
- else if ( c2 == iMaskBgColor && intellFlagBG )
- {
- sumB += c1;
- ++nofB;
- intellFlagBG = EFalse;
- }
- for ( TInt l = 0; l < columnDelta; l++ )
- {
- if ( iterFlag )
- {
- bmpIterator1.DecXPos();
- bmpIterator2.DecXPos();
- }
- else
- {
- bmpIterator1.IncXPos();
- bmpIterator2.IncXPos();
- }
- }
- }
-
- for ( TInt k = 0; k < rowDelta; k++ )
- {
- bmpIterator1.IncYPos();
- bmpIterator2.IncYPos();
- }
- for ( TInt l = 0; l < columnDelta; l++ )
- {
- if ( iterFlag )
- {
- bmpIterator1.IncXPos();
- bmpIterator2.IncXPos();
- }
- else
- {
- bmpIterator1.DecXPos();
- bmpIterator2.DecXPos();
- }
- }
- iterFlag = !iterFlag;
- }
- bmpIterator2.End();
- bmpIterator1.End();
-
- if ( nofB == 0 ) //something wrong, should be some BG
- return KWorstCase;
-
- TInt avgB = sumB / ( nofB );
-
- if ( Abs( fgColor - avgB ) < iAvgDiffMin )
- {
- return KWorstCase;
- }
-
- return 0;
- }
-
-void CHtiTextRcg::MinMax(CFbsBitmap * aBitmap, TInt& aMin, TInt& aMax)
- {
- //straight average difference
- TSize aSize = aBitmap->SizeInPixels();
- TBitmapUtil bmpIterator(aBitmap);
-
- bmpIterator.Begin( TPoint(0,0) );
-
- aMin = KMaxTInt;
- aMax = -1;
- for ( TInt i = 0; i < aSize.iHeight; ++i )
- {
- for ( TInt j = 0; j < aSize.iWidth; ++j )
- {
- TInt c = ( bmpIterator.GetPixel() ) & 0xff;
-
- if ( c < aMin )
- {
- aMin = c;
- }
- else if ( c > aMax )
- {
- aMax = c;
- }
-
- if ( i & 1 )
- {
- bmpIterator.DecXPos();
- }
- else
- {
- bmpIterator.IncXPos();
- }
- }
- bmpIterator.IncYPos();
-
- if ( i & 1 )
- {
- bmpIterator.IncXPos();
- }
- else
- {
- bmpIterator.DecXPos();
- }
- }
-
- bmpIterator.End();
- }
-
-CFbsBitmap* CHtiTextRcg::ColorDownL( CFbsBitmap * aBitmap )
- {
- TSize bmpSize = aBitmap->SizeInPixels();
- CFbsBitmap* result = new ( ELeave ) CFbsBitmap();
- User::LeaveIfError( result->Create( bmpSize, EGray256 ) );
-
- TBitmapUtil srcBmpIterator( aBitmap );
- TBitmapUtil resultBmpIterator( result );
-
- srcBmpIterator.Begin( TPoint( 0, 0 ) );
- resultBmpIterator.Begin( TPoint( 0, 0 ), srcBmpIterator );
-
- TPoint point( 0, 0 );
- for ( point.iY = 0; point.iY < bmpSize.iHeight; ++point.iY )
- {
- point.iX = 0;
- srcBmpIterator.SetPos( point );
- resultBmpIterator.SetPos( point );
- for ( ; point.iX < bmpSize.iWidth; ++point.iX )
- {
- TUint32 c = srcBmpIterator.GetPixel();
- TRgb col( c );
- resultBmpIterator.SetPixel( col.Gray256() );
- srcBmpIterator.IncXPos();
- resultBmpIterator.IncXPos();
- }
- }
-
- resultBmpIterator.End();
- srcBmpIterator.End();
-
- return result;
- }
-
-CFbsBitmap* CHtiTextRcg::GetTextBitmapL( const TDesC& aText,
- const CFont* fontUsed,
- const TInt aLength )
- {
- return GetTextBitmapL( aText, fontUsed, KRgbBlack, KRgbWhite,
- EGray256, aLength );
- }
-
-
-
-CFbsBitmap* CHtiTextRcg::GetTextBitmapL( const TDesC& aText,
- const CFont* fontUsed,
- TRgb aForeground,
- TRgb aBackground,
- TDisplayMode aDisplayMode,
- const TInt aLength )
-{
- HTI_LOG_FUNC_IN( "CHtiTextRcg::GetTextBitmapL" )
- // Measure the text to get needed bitmap size and baseline point
- CFont::TMeasureTextOutput output;
- TInt reqWidth = fontUsed->MeasureText( aText, NULL, &output );
- reqWidth = Max( reqWidth, output.iBounds.Width() );
-
- // If only partial text requested, calculate new width but keep the
- // height (and baseline) as it needs to be the same as for the full text
- // for the text recognition to work.
- if ( aLength < aText.Length() )
- {
- CFont::TMeasureTextOutput partialOutput;
- reqWidth = fontUsed->MeasureText( aText.Left( aLength ), NULL,
- &partialOutput );
- reqWidth = Max( reqWidth, partialOutput.iBounds.Width() );
- }
-
- TSize bmpSize( reqWidth, output.iBounds.Height() );
- HTI_LOG_FORMAT( "Bitmap width = %d", bmpSize.iWidth );
- HTI_LOG_FORMAT( "Bitmap height = %d", bmpSize.iHeight );
-
- // Create the bitmap
- CFbsBitmap* result = new ( ELeave ) CFbsBitmap();
- User::LeaveIfError( result->Create( bmpSize, aDisplayMode ) );
-
- CFbsBitGc* bitmapContext = NULL;
- CFbsBitmapDevice* bitmapDevice = CFbsBitmapDevice::NewL( result );
- CleanupStack::PushL( bitmapDevice );
- User::LeaveIfError( bitmapDevice->CreateContext( bitmapContext ) );
- CleanupStack::PushL( bitmapContext );
- bitmapContext->SetBrushColor( aBackground );
- bitmapContext->Clear();
- bitmapContext->UseFont( fontUsed );
- bitmapContext->SetPenColor( aForeground );
-
- // Set the baseline point and draw the text
- TPoint pos( 0, bmpSize.iHeight - output.iBounds.iBr.iY );
- HTI_LOG_FORMAT( "Baseline Y = %d", pos.iY );
- if ( aLength < aText.Length() )
- {
- bitmapContext->DrawText( aText.Left( aLength ), pos );
- }
- else
- {
- bitmapContext->DrawText( aText, pos );
- }
-
- CleanupStack::PopAndDestroy( 2 );
- HTI_LOG_FUNC_OUT( "CHtiTextRcg::GetTextBitmapL" )
- return result;
-}
-
-
-// End of file