author | Simon Howkins <simonh@symbian.org> |
Mon, 15 Nov 2010 14:53:34 +0000 | |
branch | RCL_3 |
changeset 105 | 871af676edac |
parent 0 | dd21522fd290 |
permissions | -rw-r--r-- |
0
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/* |
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* Copyright (c) 2006-2008 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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|
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|
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#define RGB565TO888(rgb565) (((rgb565 << 8) & 0xf80000) | ((rgb565 << 5) & 0x00fc00) | ((rgb565 << 3) & 0x000f8)) |
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#define RGBToRGB565(r,g,b) ((r)<<11 | (g)<<5 | (b)) |
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#define RGBToRGB888(r,g,b) ( (((r) << 16) & 0xff0000) | (((g) << 8) & 0x00ff00) | ((b) & 0x000ff) ) |
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#define GET_PIX_SCANLINE_GRAY2(p, x) (((TUint16*)p)[x>>4] & (1<<(x&0x0f))) |
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#define GET_PIX_SCANLINE_64K(p, x) RGB565TO888( (TUint32)(p[x]) ) |
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#define DRAW_PIXEL_MASKED(p, c, m) *p ^= c; *p &= m; *p ^= c; |
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#define BLEND(c1,c2,a) (((a)*((c1)-(c2))>>8)+(c2)); |
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#define RED(c) (((c)>>16)&0xff) |
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#define GREEN(c) (((c)>>8)&0xff) |
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#define BLUE(c) ((c)&0xff) |
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#define RED5(c) (((c)>>11)&0x1f) |
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#define GREEN6(c) (((c)>>5)&0x3f) |
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#define BLUE5(c) ((c)&0x1f) |
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//============================================================================= |
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// TFastWrapUtil |
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//============================================================================= |
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void TFastWrapUtil::NextLine() |
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{ |
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if( ++iDelta.iY == iSrcHeight ) iDelta.iY = 0; |
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iDelta.iX = iOrig.iX; |
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} |
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void TFastWrapUtil::operator+=( TInt aSteps ) |
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{ |
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// this is a bit slow, fortunately it is only used when scaling images |
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iDelta.iX += aSteps; |
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if( iDelta.iX >= iSrcWidth ) iDelta.iX = iDelta.iX % iSrcWidth; |
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} |
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|
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void TFastWrapUtil::JumpLines( TInt aSteps ) |
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{ |
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iDelta.iY += aSteps; |
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if( iDelta.iY >= iSrcHeight ) iDelta.iY = iDelta.iY % iSrcHeight; |
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iDelta.iX = iOrig.iX; |
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} |
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//============================================================================= |
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// TSrcScanLine |
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//============================================================================= |
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void TSrcScanLine::Mix( TUint16* aTarget ) |
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{ |
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*aTarget = iSrcLine[iPos]; |
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} |
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void TSrcScanLine::Mix( TUint32* aTarget ) |
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{ |
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*aTarget = 0xff000000 | GET_PIX_SCANLINE_64K( iSrcLine, iPos ); |
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} |
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//============================================================================= |
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// TSrcScanLineMasked |
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//============================================================================= |
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void TSrcScanLineMasked::Mix( TUint16* aTarget ) |
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{ |
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TUint16 trgMask = GET_PIX_SCANLINE_GRAY2( iSrcMask, iPos ); |
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if( trgMask ) |
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*aTarget = iSrcLine[iPos]; |
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} |
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|
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void TSrcScanLineMasked::Mix( TUint32* aTarget ) |
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{ |
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TUint32 trgCol = GET_PIX_SCANLINE_64K( iSrcLine, iPos ); |
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TUint32 trgMask = GET_PIX_SCANLINE_GRAY2( iSrcMask, iPos ); |
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if( trgMask ) |
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*aTarget = 0xff000000 | trgCol; |
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//trgMask = trgMask ? 0xff000000 : 0xffffffff; // NOT |
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//DRAW_PIXEL_MASKED( aTarget, trgCol, trgMask ); |
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} |
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|
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//============================================================================= |
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// TSrcScanLineAlpha |
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//============================================================================= |
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void TSrcScanLineAlpha::Mix( TUint16* aTarget ) |
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{ |
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TUint16 trgCol = iSrcLine[iPos]; |
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TUint16 trgAlpha = (TUint16)( iAlpha[iPos] ); |
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if( trgAlpha == 0xff ) |
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*aTarget = trgCol; |
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else if( trgAlpha ) |
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{ |
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TInt col = *aTarget; |
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TInt r = BLEND(RED5(trgCol),RED5(col),trgAlpha); |
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TInt g = BLEND(GREEN6(trgCol),GREEN6(col),trgAlpha); |
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TInt b = BLEND(BLUE5(trgCol),BLUE5(col),trgAlpha); |
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*aTarget = RGBToRGB565(r,g,b); |
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} |
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} |
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|
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void TSrcScanLineAlpha::Mix( TUint32* aTarget ) |
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{ |
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TUint32 trgCol = GET_PIX_SCANLINE_64K( iSrcLine, iPos ); |
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TUint32 trgAlpha = iAlpha[iPos]; |
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if( trgAlpha == 0xff ) |
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*aTarget = 0xff000000 | trgCol; |
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else if( trgAlpha ) |
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{ |
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TUint32 col = *aTarget; |
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TUint32 r = BLEND(RED(trgCol),RED(col),trgAlpha); |
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TUint32 g = BLEND(GREEN(trgCol),GREEN(col),trgAlpha); |
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TUint32 b = BLEND(BLUE(trgCol),BLUE(col),trgAlpha); |
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*aTarget = 0xff000000 | RGBToRGB888(r,g,b); |
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} |
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} |
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|
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//============================================================================= |
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// TScanLineTiler<T>::MixLine |
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//============================================================================= |
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template <class S, typename T> |
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void TScanLineTiler<S, T>::MixLine( T& aTarget, S& aSrcLine, TFastWrapUtil& aWrap ) |
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{ |
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TInt count = iTrgWidth; |
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|
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while( count-- ) |
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{ |
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aSrcLine.Mix( aTarget ); |
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++aTarget; |
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++aWrap; |
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|
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// fast wrapping |
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const TPoint& pt = *aWrap; |
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aSrcLine = pt.iX; |
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} |
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} |
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//============================================================================= |
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// TileBitmap |
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//============================================================================= |
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template <class S, typename T> |
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void TileBitmap( T& aTarget, TInt aStride, CScanLineFetcher& aFetcher, TScanLineTiler<S, T>& aTiler, |
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TInt aTrgHeight, TInt aSrcWidth, TInt aSrcHeight, const TPoint& aOffset ) |
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{ |
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TInt count = aTrgHeight; |
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S srcLine; |
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|
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// fast wraping |
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TFastWrapUtil srcWrap( aOffset, aSrcWidth, aSrcHeight ); |
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while( count-- ) |
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{ |
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aFetcher.Fetch( srcLine ); |
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aTiler.MixLine( aTarget, srcLine, srcWrap ); |
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|
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// next line, wrapped |
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aTarget += aStride; |
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srcWrap.NextLine(); |
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const TPoint& p = *srcWrap; |
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aFetcher = p.iY; |
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} |
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} |
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// END OF FILE |