diff -r e1b950c65cb4 -r 837f303aceeb epoc32/include/graphics/blendingalgorithms.inl --- a/epoc32/include/graphics/blendingalgorithms.inl Wed Mar 31 12:27:01 2010 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,133 +0,0 @@ -// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). -// All rights reserved. -// This component and the accompanying materials are made available -// under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members -// which accompanies this distribution, and is available -// at the URL "http://www.symbianfoundation.org/legal/licencesv10.html". -// -// Initial Contributors: -// Nokia Corporation - initial contribution. -// -// Contributors: -// -// Description: -// - -const TUint32 KRBMask = 0x00ff00ff; -const TUint32 KAGMask = 0xff00ff00; -const TUint32 KGMask = 0x0000ff00; - -//Algoriths for Premultiplied alpha screenmode/pixel format. - -inline TUint32 PMAPixelBlend(TUint32 aDestPixel, TUint32 aSrcPixel, TUint8 aMask) - { - if(aMask) - { - if(aMask == 0xff) // opaque, so unchanged - { - return aSrcPixel; - } - else - { - return PMABlend_noChecks(aDestPixel, aSrcPixel, aMask); - } - } - else // completely transparent - { - return aDestPixel; - } - } - -inline TUint32 PMAPixelBlend(TUint32 aDestPixel, TUint32 aSrcPixel) - { - TUint8 mask = (TUint8)(aSrcPixel >> 24); - return PMAPixelBlend(aDestPixel, aSrcPixel, mask); - } - -inline TUint32 PMABlend_noChecks(TUint32 aDestPixel, TUint32 aSrcPixel, TUint8 aMaskingFactor) - { - TUint32 src_c = aSrcPixel & KRBMask; - TUint32 dst_c = aDestPixel & KRBMask; - const TUint32 mask = 0x0100 - aMaskingFactor; - dst_c = (src_c + ((mask * dst_c)>>8)) & KRBMask; - src_c = (aSrcPixel & KAGMask)>>8; - TUint32 dst_ag = (aDestPixel & KAGMask)>>8; - dst_c |= ((src_c + ((mask * dst_ag)>>8)) & KRBMask)<<8; - return dst_c; - } - -inline void PMABlend_noChecksInplace(TUint32& aDest_io, TUint32& aSrcPixel,TUint8& aMaskingFactor) - { - TUint32 src_c = aSrcPixel & KRBMask; - TUint32 dst_ag = (aDest_io & KAGMask) >> 8; - aDest_io = aDest_io & KRBMask; - const TUint32 mask = 0x0100 - aMaskingFactor; - aDest_io = (src_c + ((mask * aDest_io) >> 8)) & KRBMask; - src_c = (aSrcPixel & KAGMask) >> 8; - aDest_io |= ((src_c + ((mask * dst_ag) >> 8)) & KRBMask)<<8; - } - -inline void PMAInplaceBlend(TUint32& aDest_io, TUint32& aSrc_in) - { - TUint8 mask = (TUint8)(aSrc_in >> 24); - if(mask) - { - if(mask == 0xff) // opaque, so dst = src. - { - aDest_io = aSrc_in; - } - else - { - PMABlend_noChecksInplace(aDest_io, aSrc_in, mask); - } - } - //else src completely transparent, so dst unchanged. - } - -inline TUint32 NonPMA2PMAPixel(TUint32 aPixel) - { - TUint8 tA = (TUint8)(aPixel >> 24); - if (tA==0) - { - return 0; - } - if (tA==0xff) - { - return aPixel; - } - - // Use a bias value of 128 rather than 255, but also add 1/256 of the numerator - // before dividing the sum by 256. - - TUint32 tap1=tA+1; - TUint32 scaledRB = (aPixel & KRBMask) * tap1; - TUint32 scaledG = (aPixel & KGMask ) * tap1; - return (aPixel & 0xff000000) | ((scaledRB>>8) & KRBMask) | ((scaledG>>8)& KGMask); - } - -inline TUint32 PMA2NonPMAPixel(TUint32 aPixel, const TUint16* aNormTable) - { - TUint8 alpha = (TUint8)(aPixel >> 24); - if (alpha==0) - { - return 0; - } - if (alpha==0xff) - { - return aPixel; - } - TUint16 norm = aNormTable[alpha]; - TUint32 norm_rb = (((aPixel & KRBMask) * norm) >> 8) & KRBMask; - TUint32 norm_g = (((aPixel & KGMask ) * norm) >> 8) & KGMask; - return ((aPixel & 0xff000000) | norm_rb | norm_g); - } - -inline void Convert2PMA(TUint32& aInOutValue) - { - aInOutValue = NonPMA2PMAPixel(aInOutValue); - } - -inline void Convert2NonPMA(TUint32& aInOutValue, const TUint16* aNormTable) - { - aInOutValue = PMA2NonPMAPixel(aInOutValue, aNormTable); - }