/*
* Copyright (c) 2004 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: Image Transforms subsystem.
*
*/
// INCLUDE FILES
#include <e32svr.h>
#include <fbs.h>
#include "CVtImageScalerImplBilinear.h"
#include "cvtimage.h"
#include "CVtImageScalerMacros.h"
// MACROS
#ifdef _DEBUG
# define __IF_DEBUG(t) {RDebug::t;}
#else
# define __IF_DEBUG(t)
#endif
// LOCAL CONSTANTS AND MACROS
const TUint32 KDecimalBits = 14; // 18.14 pseudo real format,
// this must be lower than 15!
// ============================ MEMBER FUNCTIONS ===============================
// ======================= CVtImageScalerImplBilinear ==========================
// -----------------------------------------------------------------------------
// CVtImageScalerImplBilinear::Scale( TBool& aContinue )
// -----------------------------------------------------------------------------
TInt CVtImageScalerImplBilinear::Scale( TBool& aContinue )
{
TInt result( KErrNone );
aContinue = EFalse;
// this implementation does not support different display modes for source
// and target
if( iSource->DisplayMode() != iTarget->DisplayMode() )
{
return KErrNotSupported;
}
// if sizes are same, just copy the data
if( iSource->Size() == iTarget->Size() )
{
Mem::Copy(
iTarget->DataAddress(),
iSource->DataAddress(),
iTarget->BytesPerRow() * iTarget->Size().iHeight );
}
else if ( ( iSource->Size().iHeight * 2 == iTarget->Size().iHeight )
&& ( iSource->Size().iWidth * 2 == iTarget->Size().iWidth ) )
{
switch( iSource->DisplayMode() )
{
case CVtImage::EVtColor4K:
Scale2x4K64K( 0xeee ); // 0000ggggbbbbrrrr ->
break; // mask = %0000111011101110 = 0xeee
case CVtImage::EVtColor64K:
Scale2x4K64K( 0xf7de ); // bbbbbggggggrrrrr ->
break; // mask = %1111011111011110 = 0xf7de
case CVtImage::EVtColor16M:
Scale2x16M();
break;
case CVtImage::EVtColor16MU:
case CVtImage::EVtColor16MA:
Scale2x16MU16MA();
break;
default:
if ( iSource->Type() == CVtImage::EVtImageBitmap &&
iTarget->Type() == CVtImage::EVtImageBitmap )
{
TRAPD( error,
ScaleWithBitmapScalerL(
CBitmapScaler::EMaximumQuality ) );
result = error;
}
else
{
result = KErrNotSupported;
}
}
}
else
{
Initialize();
switch( iSource->DisplayMode() )
{
case CVtImage::EVtColor4K:
Scale4K();
break;
case CVtImage::EVtColor64K:
Scale64K();
break;
case CVtImage::EVtColor16M:
Scale16M();
break;
case CVtImage::EVtColor16MU:
Scale16MU();
break;
case CVtImage::EVtColor16MA:
Scale16MA();
break;
default:
if ( iSource->Type() == CVtImage::EVtImageBitmap &&
iTarget->Type() == CVtImage::EVtImageBitmap )
{
TRAPD( error,
ScaleWithBitmapScalerL(
CBitmapScaler::EMaximumQuality ) );
result = error;
}
else
{
result = KErrNotSupported;
}
}
}
return result;
}
// -----------------------------------------------------------------------------
// CVtImageScalerImplBilinear::ValidateSourceTargetL(
// const CVtImage& aSource, CVtImage& aTarget )
// -----------------------------------------------------------------------------
void CVtImageScalerImplBilinear::ValidateSourceTargetL(
const CVtImage& aSource,
CVtImage& aTarget )
{
if( aSource.DisplayMode() != aTarget.DisplayMode() )
{
User::Leave( KErrNotSupported );
}
switch( aSource.DisplayMode() )
{
case CVtImage::EVtColor4K:
case CVtImage::EVtColor64K:
case CVtImage::EVtColor16M:
case CVtImage::EVtColor16MU:
case CVtImage::EVtColor16MA:
break;
default:
// Scaling for bitmaps is supported for other display modes
if ( !( aSource.Type() == CVtImage::EVtImageBitmap &&
aTarget.Type() == CVtImage::EVtImageBitmap ) )
{
User::Leave( KErrNotSupported );
}
}
}
// -----------------------------------------------------------------------------
// CVtImageScalerImplBilinear::Initialize()
// -----------------------------------------------------------------------------
void CVtImageScalerImplBilinear::Initialize()
{
iU = ( 1 << KDecimalBits ) * iSource->Size().iWidth /
iTarget->Size().iWidth;
iV = ( 1 << KDecimalBits ) * iSource->Size().iHeight /
iTarget->Size().iHeight;
}
// -----------------------------------------------------------------------------
// CVtImageScalerImplBilinear::Scale4K()
// -----------------------------------------------------------------------------
void CVtImageScalerImplBilinear::Scale4K()
{
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale4K() >>" ), RThread().Id().operator TUint() ) );
TInt width = iTarget->Size().iWidth;
TInt height = iTarget->Size().iHeight;
TInt mod_width = width - ( ( 1 << KDecimalBits ) / iU );
TUint16* t = reinterpret_cast< TUint16* >( iTarget->DataAddress() );
TUint32 sourceY( 0 );
TUint32 b00( 0 );
TUint32 g00( 0 );
TUint32 r00( 0 );
TUint32 b01( 0 );
TUint32 g01( 0 );
TUint32 r01( 0 );
TUint32 b10( 0 );
TUint32 g10( 0 );
TUint32 r10( 0 );
TUint32 b11( 0 );
TUint32 g11( 0 );
TUint32 r11( 0 );
for( TInt y = 0; y < height; y++ )
{
TUint16* s = reinterpret_cast< TUint16* >(
iSource->LineAddress( sourceY >> KDecimalBits ) );
TUint16* snext = reinterpret_cast< TUint16* >(
iSource->LineAddress( ( sourceY >> KDecimalBits ) + 1 ) );
TUint32 invdv = sourceY & ( ( 1 << KDecimalBits ) - 1 ); // decimal part
TUint32 dv = ( 1 << KDecimalBits ) - invdv; // 1 - decimal part
TUint32 sourceX( 0 );
TUint32 x0prev( TUint32( -1 ) );
TInt x;
for( x = 0; x < mod_width; x++ )
{
TUint32 x0 = sourceX >> KDecimalBits;
// If the source is still same then we don't have to fetch
// pixels from memory and unpack them again
if( x0 != x0prev )
{
TUint32 p0 = *( s + x0 );
b00 = UNPACK_4K_BLUE( p0 );
g00 = UNPACK_4K_GREEN( p0 );
r00 = UNPACK_4K_RED( p0 );
p0 = *( s + x0 + 1 );
b01 = UNPACK_4K_BLUE( p0 );
g01 = UNPACK_4K_GREEN( p0 );
r01 = UNPACK_4K_RED( p0 );
p0 = *( snext + x0 );
b10 = UNPACK_4K_BLUE( p0 );
g10 = UNPACK_4K_GREEN( p0 );
r10 = UNPACK_4K_RED( p0 );
p0 = *( snext + x0 + 1 );
b11 = UNPACK_4K_BLUE( p0 );
g11 = UNPACK_4K_GREEN( p0 );
r11 = UNPACK_4K_RED( p0 );
x0prev = x0;
}
TUint32 invdu = sourceX & ( ( 1 << KDecimalBits ) - 1 ); // decimal
TUint32 du = ( 1 << KDecimalBits ) - invdu; // 1 - decimal part
TUint32 w1 = ( du * dv ) >> KDecimalBits;
TUint32 w2 = ( invdu * dv ) >> KDecimalBits;
TUint32 w3 = ( du * invdv ) >> KDecimalBits;
TUint32 w4 = ( invdu * invdv ) >> KDecimalBits;
TUint32 bres = w1 * b00 + w2 * b01 + w3 * b10 + w4 * b11;
bres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 gres = w1 * g00 + w2 * g01 + w3 * g10 + w4 * g11;
gres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 rres = w1 * r00 + w2 * r01 + w3 * r10 + w4 * r11;
rres += ( 1 << ( KDecimalBits - 1 ) );
*t = 0;
*t++ = PACK_4K_BGR(
bres >> KDecimalBits,
gres >> KDecimalBits,
rres >> KDecimalBits );
sourceX += iU;
}
// last columns
for( ; x < width; x++ )
{
TUint32 x0 = sourceX >> KDecimalBits;
// If the source is still same then we don't have to fetch pixels
// from memory and unpack them again
if( x0 != x0prev )
{
TUint32 p0 = *( s + x0 );
b01 = b00 = UNPACK_4K_BLUE( p0 );
g01 = g00 = UNPACK_4K_GREEN( p0 );
r01 = r00 = UNPACK_4K_RED( p0 );
p0 = *( snext + x0 );
b11 = b10 = UNPACK_4K_BLUE( p0 );
g11 = g10 = UNPACK_4K_GREEN( p0 );
r11 = r10 = UNPACK_4K_RED( p0 );
x0prev = x0;
}
TUint32 invdu = sourceX & ( ( 1 << KDecimalBits ) - 1 ); // decimal
TUint32 du = ( 1 << KDecimalBits ) - invdu; // 1 - decimal part
TUint32 w1 = ( du * dv ) >> KDecimalBits;
TUint32 w2 = ( invdu * dv ) >> KDecimalBits;
TUint32 w3 = ( du * invdv ) >> KDecimalBits;
TUint32 w4 = ( invdu * invdv ) >> KDecimalBits;
TUint32 bres = w1 * b00 + w2 * b01 + w3 * b10 + w4 * b11;
bres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 gres = w1 * g00 + w2 * g01 + w3 * g10 + w4 * g11;
gres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 rres = w1 * r00 + w2 * r01 + w3 * r10 + w4 * r11;
rres += ( 1 << ( KDecimalBits - 1 ) );
*t++ = PACK_4K_BGR(
bres >> KDecimalBits,
gres >> KDecimalBits,
rres >> KDecimalBits );
sourceX += iU;
}
// if width is not even -> then we need to skip one additional byte
if( width & 1 )
{
t++;
}
sourceY += iV;
}
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale4K() <<" ), RThread().Id().operator TUint() ) );
}
// -----------------------------------------------------------------------------
// CVtImageScalerImplBilinear::Scale64K()
// -----------------------------------------------------------------------------
void CVtImageScalerImplBilinear::Scale64K()
{
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale64K() >>" ), RThread().Id().operator TUint() ) );
TInt width = iTarget->Size().iWidth;
TInt height = iTarget->Size().iHeight;
TInt mod_width = width - ( ( 1 << KDecimalBits ) / iU );
TUint16* t = reinterpret_cast< TUint16* >( iTarget->DataAddress() );
TUint32 sourceY( 0 );
TUint32 b00( 0 );
TUint32 g00( 0 );
TUint32 r00( 0 );
TUint32 b01( 0 );
TUint32 g01( 0 );
TUint32 r01( 0 );
TUint32 b10( 0 );
TUint32 g10( 0 );
TUint32 r10( 0 );
TUint32 b11( 0 );
TUint32 g11( 0 );
TUint32 r11( 0 );
for( TInt y = 0; y < height; y++ )
{
TUint16* s = reinterpret_cast< TUint16* >(
iSource->LineAddress( sourceY >> KDecimalBits ) );
TUint16* snext = reinterpret_cast< TUint16* >(
iSource->LineAddress( ( sourceY >> KDecimalBits ) + 1 ) );
TUint32 invdv = sourceY & ( ( 1 << KDecimalBits ) - 1 ); // decimal part
TUint32 dv = ( 1 << KDecimalBits ) - invdv; // 1 - decimal part
TUint32 sourceX( 0 );
TUint32 x0prev( TUint32( -1 ) );
TInt x;
for( x = 0; x < mod_width; x++ )
{
TUint32 x0 = sourceX >> KDecimalBits;
// If the source is still same then we don't have to fetch pixels
// from memory and unpack them again
if( x0 != x0prev )
{
TUint32 p0 = *( s + x0 );
b00 = UNPACK_64K_BLUE( p0 );
g00 = UNPACK_64K_GREEN( p0 );
r00 = UNPACK_64K_RED( p0 );
p0 = *( s + x0 + 1 );
b01 = UNPACK_64K_BLUE( p0 );
g01 = UNPACK_64K_GREEN( p0 );
r01 = UNPACK_64K_RED( p0 );
p0 = *( snext + x0 );
b10 = UNPACK_64K_BLUE( p0 );
g10 = UNPACK_64K_GREEN( p0 );
r10 = UNPACK_64K_RED( p0 );
p0 = *( snext + x0 + 1 );
b11 = UNPACK_64K_BLUE( p0 );
g11 = UNPACK_64K_GREEN( p0 );
r11 = UNPACK_64K_RED( p0 );
x0prev = x0;
}
TUint32 invdu = sourceX & ( ( 1 << KDecimalBits ) - 1 ); // decimal
TUint32 du = ( 1 << KDecimalBits ) - invdu; // 1 - decimal part
TUint32 w1 = ( du * dv ) >> KDecimalBits;
TUint32 w2 = ( invdu * dv ) >> KDecimalBits;
TUint32 w3 = ( du * invdv ) >> KDecimalBits;
TUint32 w4 = ( invdu * invdv ) >> KDecimalBits;
TUint32 bres = w1 * b00 + w2 * b01 + w3 * b10 + w4 * b11;
bres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 gres = w1 * g00 + w2 * g01 + w3 * g10 + w4 * g11;
gres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 rres = w1 * r00 + w2 * r01 + w3 * r10 + w4 * r11;
rres += ( 1 << ( KDecimalBits - 1 ) );
*t++ = PACK_64K_BGR(
bres >> KDecimalBits,
gres >> KDecimalBits,
rres >> KDecimalBits );
sourceX += iU;
}
// last columns
for( ; x < width; x++ )
{
TUint32 x0 = sourceX >> KDecimalBits;
// If the source is still same then we don't have to fetch pixels
// from memory and unpack them again
if( x0 != x0prev )
{
TUint32 p0 = *( s + x0 );
b01 = b00 = UNPACK_64K_BLUE( p0 );
g01 = g00 = UNPACK_64K_GREEN( p0 );
r01 = r00 = UNPACK_64K_RED( p0 );
p0 = *( snext + x0 );
b11 = b10 = UNPACK_64K_BLUE( p0 );
g11 = g10 = UNPACK_64K_GREEN( p0 );
r11 = r10 = UNPACK_64K_RED( p0 );
x0prev = x0;
}
TUint32 invdu = sourceX & ( ( 1 << KDecimalBits ) - 1 ); // decimal
TUint32 du = ( 1 << KDecimalBits ) - invdu; // 1 - decimal part
TUint32 w1 = ( du * dv ) >> KDecimalBits;
TUint32 w2 = ( invdu * dv ) >> KDecimalBits;
TUint32 w3 = ( du * invdv ) >> KDecimalBits;
TUint32 w4 = ( invdu * invdv ) >> KDecimalBits;
TUint32 bres = w1 * b00 + w2 * b01 + w3 * b10 + w4 * b11;
bres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 gres = w1 * g00 + w2 * g01 + w3 * g10 + w4 * g11;
gres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 rres = w1 * r00 + w2 * r01 + w3 * r10 + w4 * r11;
rres += ( 1 << ( KDecimalBits - 1 ) );
*t++ = PACK_64K_BGR(
bres >> KDecimalBits,
gres >> KDecimalBits,
rres >> KDecimalBits );
sourceX += iU;
}
// if width is not even -> then we need to skip one additional byte
if( width & 1 )
{
t++;
}
sourceY += iV;
}
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale64K() <<" ), RThread().Id().operator TUint() ) );
}
// -----------------------------------------------------------------------------
// CVtImageScalerImplBilinear::Scale16M()
// -----------------------------------------------------------------------------
void CVtImageScalerImplBilinear::Scale16M()
{
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale16M() >>" ), RThread().Id().operator TUint() ) );
TInt width = iTarget->Size().iWidth;
TInt height = iTarget->Size().iHeight;
TInt mod_width = width - ( ( 1 << KDecimalBits ) / iU );
TUint32 t_pitch = iTarget->BytesPerRow();
TUint8* t = reinterpret_cast< TUint8* >( iTarget->DataAddress() );
TUint32 sourceY( 0 );
TUint32 b00( 0 );
TUint32 g00( 0 );
TUint32 r00( 0 );
TUint32 b01( 0 );
TUint32 g01( 0 );
TUint32 r01( 0 );
TUint32 b10( 0 );
TUint32 g10( 0 );
TUint32 r10( 0 );
TUint32 b11( 0 );
TUint32 g11( 0 );
TUint32 r11( 0 );
for( TInt y = 0; y < height; y++ )
{
TUint8* s = reinterpret_cast< TUint8* >(
iSource->LineAddress( sourceY >> KDecimalBits ) );
TUint8* snext = reinterpret_cast< TUint8* >(
iSource->LineAddress( ( sourceY >> KDecimalBits ) + 1 ) );
TUint32 invdv = sourceY & ( ( 1 << KDecimalBits ) - 1 ); // decimal part
TUint32 dv = ( 1 << KDecimalBits ) - invdv; // 1 - decimal part
TUint32 sourceX( 0 );
TUint32 x0prev( TUint32( -1 ) );
TInt x;
TUint8* d = t;
for( x = 0; x < mod_width; x++ )
{
TUint32 x0 = ( sourceX >> KDecimalBits ) * 3;
if( x0 != x0prev )
{
TUint8* tempSrc = s + x0;
b00 = *tempSrc++;
g00 = *tempSrc++;
r00 = *tempSrc++;
b01 = *tempSrc++;
g01 = *tempSrc++;
r01 = *tempSrc++;
tempSrc = snext + x0;
b10 = *tempSrc++;
g10 = *tempSrc++;
r10 = *tempSrc++;
b11 = *tempSrc++;
g11 = *tempSrc++;
r11 = *tempSrc++;
x0prev = x0;
}
TUint32 invdu = sourceX & ( ( 1 << KDecimalBits ) - 1 ); // decimal
TUint32 du = ( 1 << KDecimalBits ) - invdu; // 1 - decimal part
TUint32 w1 = ( du * dv ) >> KDecimalBits;
TUint32 w2 = ( invdu * dv ) >> KDecimalBits;
TUint32 w3 = ( du * invdv ) >> KDecimalBits;
TUint32 w4 = ( invdu * invdv ) >> KDecimalBits;
TUint32 bres = w1 * b00 + w2 * b01 + w3 * b10 + w4 * b11;
bres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 gres = w1 * g00 + w2 * g01 + w3 * g10 + w4 * g11;
gres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 rres = w1 * r00 + w2 * r01 + w3 * r10 + w4 * r11;
rres += ( 1 << ( KDecimalBits - 1 ) );
*d++ = static_cast< TUint8 >( bres >> KDecimalBits );
*d++ = static_cast< TUint8 >( gres >> KDecimalBits );
*d++ = static_cast< TUint8 >( rres >> KDecimalBits );
sourceX += iU;
}
// last columns
for( ; x < width; x++ )
{
TUint32 x0 = ( sourceX >> KDecimalBits ) * 3;
if( x0 != x0prev )
{
TUint8* tempSrc = s + x0;
b01 = b00 = *tempSrc++;
g01 = g00 = *tempSrc++;
r01 = r00 = *tempSrc++;
tempSrc = snext + x0;
b11 = b10 = *tempSrc++;
g11 = g10 = *tempSrc++;
r11 = r10 = *tempSrc++;
x0prev = x0;
}
TUint32 invdu = sourceX & ( ( 1 << KDecimalBits ) - 1 ); // decimal
TUint32 du = ( 1 << KDecimalBits ) - invdu; // 1 - decimal part
TUint32 w1 = ( du * dv ) >> KDecimalBits;
TUint32 w2 = ( invdu * dv ) >> KDecimalBits;
TUint32 w3 = ( du * invdv ) >> KDecimalBits;
TUint32 w4 = ( invdu * invdv ) >> KDecimalBits;
TUint32 bres = w1 * b00 + w2 * b01 + w3 * b10 + w4 * b11;
bres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 gres = w1 * g00 + w2 * g01 + w3 * g10 + w4 * g11;
gres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 rres = w1 * r00 + w2 * r01 + w3 * r10 + w4 * r11;
rres += ( 1 << ( KDecimalBits - 1 ) );
*d++ = static_cast< TUint8 >( bres >> KDecimalBits );
*d++ = static_cast< TUint8 >( gres >> KDecimalBits );
*d++ = static_cast< TUint8 >( rres >> KDecimalBits );
sourceX += iU;
}
t += t_pitch;
sourceY += iV;
}
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale16M() <<" ), RThread().Id().operator TUint() ) );
}
// -----------------------------------------------------------------------------
// CVtImageScalerImplBilinear::Scale16MU()
// -----------------------------------------------------------------------------
void CVtImageScalerImplBilinear::Scale16MU()
{
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale16MU() >>" ), RThread().Id().operator TUint() ) );
TInt width = iTarget->Size().iWidth;
TInt height = iTarget->Size().iHeight;
TInt mod_width = width - ( ( 1 << KDecimalBits ) / iU );
TUint32* t = iTarget->DataAddress();
TUint32 sourceY( 0 );
TUint32 b00( 0 );
TUint32 g00( 0 );
TUint32 r00( 0 );
TUint32 b01( 0 );
TUint32 g01( 0 );
TUint32 r01( 0 );
TUint32 b10( 0 );
TUint32 g10( 0 );
TUint32 r10( 0 );
TUint32 b11( 0 );
TUint32 g11( 0 );
TUint32 r11( 0 );
for( TInt y = 0; y < height; y++ )
{
TUint32* s = iSource->LineAddress( sourceY >> KDecimalBits );
TUint32* snext = iSource->LineAddress( ( sourceY >> KDecimalBits ) + 1 );
TUint32 invdv = sourceY & ( ( 1 << KDecimalBits ) - 1 ); // decimal part
TUint32 dv = ( 1 << KDecimalBits ) - invdv; // 1 - decimal part
TUint32 sourceX( 0 );
TUint32 x0prev( TUint32( -1 ) );
TInt x;
for( x = 0; x < mod_width; x++ )
{
TUint32 x0 = sourceX >> KDecimalBits;
// If the source is still same then we don't have to fetch pixels
// from memory and unpack them again
if( x0 != x0prev )
{
TUint32 p0 = *( s + x0 );
b00 = UNPACK_16MU_BLUE( p0 );
g00 = UNPACK_16MU_GREEN( p0 );
r00 = UNPACK_16MU_RED( p0 );
p0 = *( s + x0 + 1 );
b01 = UNPACK_16MU_BLUE( p0 );
g01 = UNPACK_16MU_GREEN( p0 );
r01 = UNPACK_16MU_RED( p0 );
p0 = *( snext + x0 );
b10 = UNPACK_16MU_BLUE( p0 );
g10 = UNPACK_16MU_GREEN( p0 );
r10 = UNPACK_16MU_RED( p0 );
p0 = *( snext + x0 + 1 );
b11 = UNPACK_16MU_BLUE( p0 );
g11 = UNPACK_16MU_GREEN( p0 );
r11 = UNPACK_16MU_RED( p0 );
x0prev = x0;
}
TUint32 invdu = sourceX & ( ( 1 << KDecimalBits ) - 1 ); // decimal
TUint32 du = ( 1 << KDecimalBits ) - invdu; // 1 - decimal part
TUint32 w1 = ( du * dv ) >> KDecimalBits;
TUint32 w2 = ( invdu * dv ) >> KDecimalBits;
TUint32 w3 = ( du * invdv ) >> KDecimalBits;
TUint32 w4 = ( invdu * invdv ) >> KDecimalBits;
TUint32 bres = w1 * b00 + w2 * b01 + w3 * b10 + w4 * b11;
bres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 gres = w1 * g00 + w2 * g01 + w3 * g10 + w4 * g11;
gres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 rres = w1 * r00 + w2 * r01 + w3 * r10 + w4 * r11;
rres += ( 1 << ( KDecimalBits - 1 ) );
*t++ = PACK_16MU_BGR(
bres >> KDecimalBits,
gres >> KDecimalBits,
rres >> KDecimalBits );
sourceX += iU;
}
// last columns
for( ; x < width; x++ )
{
TUint32 x0 = sourceX >> KDecimalBits;
// If the source is still same then we don't have to fetch pixels
// from memory and unpack them again
if( x0 != x0prev )
{
TUint32 p0 = *( s + x0 );
b01 = b00 = UNPACK_16MU_BLUE( p0 );
g01 = g00 = UNPACK_16MU_GREEN( p0 );
r01 = r00 = UNPACK_16MU_RED( p0 );
p0 = *( snext + x0 );
b11 = b10 = UNPACK_16MU_BLUE( p0 );
g11 = g10 = UNPACK_16MU_GREEN( p0 );
r11 = r10 = UNPACK_16MU_RED( p0 );
x0prev = x0;
}
TUint32 invdu = sourceX & ( ( 1 << KDecimalBits ) - 1 ); // decimal
TUint32 du = ( 1 << KDecimalBits ) - invdu; // 1 - decimal part
TUint32 w1 = ( du * dv ) >> KDecimalBits;
TUint32 w2 = ( invdu * dv ) >> KDecimalBits;
TUint32 w3 = ( du * invdv ) >> KDecimalBits;
TUint32 w4 = ( invdu * invdv ) >> KDecimalBits;
TUint32 bres = w1 * b00 + w2 * b01 + w3 * b10 + w4 * b11;
bres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 gres = w1 * g00 + w2 * g01 + w3 * g10 + w4 * g11;
gres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 rres = w1 * r00 + w2 * r01 + w3 * r10 + w4 * r11;
rres += ( 1 << ( KDecimalBits - 1 ) );
*t++ = PACK_16MU_BGR(
bres >> KDecimalBits,
gres >> KDecimalBits,
rres >> KDecimalBits );
sourceX += iU;
}
sourceY += iV;
}
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale16MU() <<" ), RThread().Id().operator TUint() ) );
}
// -----------------------------------------------------------------------------
// CVtImageScalerImplBilinear::Scale16MA()
// -----------------------------------------------------------------------------
void CVtImageScalerImplBilinear::Scale16MA()
{
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale16MA() >>" ), RThread().Id().operator TUint() ) );
TInt width = iTarget->Size().iWidth;
TInt height = iTarget->Size().iHeight;
TInt mod_width = width - ( ( 1 << KDecimalBits ) / iU );
TUint32* t = iTarget->DataAddress();
TUint32 sourceY( 0 );
TUint32 a00( 0 );
TUint32 b00( 0 );
TUint32 g00( 0 );
TUint32 r00( 0 );
TUint32 a01( 0 );
TUint32 b01( 0 );
TUint32 g01( 0 );
TUint32 r01( 0 );
TUint32 a10( 0 );
TUint32 b10( 0 );
TUint32 g10( 0 );
TUint32 r10( 0 );
TUint32 a11( 0 );
TUint32 b11( 0 );
TUint32 g11( 0 );
TUint32 r11( 0 );
for( TInt y = 0; y < height; y++ )
{
TUint32* s = iSource->LineAddress( sourceY >> KDecimalBits );
TUint32* snext = iSource->LineAddress( ( sourceY >> KDecimalBits ) + 1 );
TUint32 invdv = sourceY & ( ( 1 << KDecimalBits ) - 1 ); // decimal part
TUint32 dv = ( 1 << KDecimalBits ) - invdv; // 1 - decimal part
TUint32 sourceX( 0 );
TUint32 x0prev( TUint32( -1 ) );
TInt x;
for( x = 0; x < mod_width; x++ )
{
TUint32 x0 = sourceX >> KDecimalBits;
// If the source is still same then we don't have to fetch pixels
// from memory and unpack them again
if( x0 != x0prev )
{
TUint32 p0 = *( s + x0 );
a00 = UNPACK_16MA_ALPHA( p0 );
b00 = UNPACK_16MA_BLUE( p0 );
g00 = UNPACK_16MA_GREEN( p0 );
r00 = UNPACK_16MA_RED( p0 );
p0 = *( s + x0 + 1 );
a01 = UNPACK_16MA_ALPHA( p0 );
b01 = UNPACK_16MA_BLUE( p0 );
g01 = UNPACK_16MA_GREEN( p0 );
r01 = UNPACK_16MA_RED( p0 );
p0 = *( snext + x0 );
a10 = UNPACK_16MA_ALPHA( p0 );
b10 = UNPACK_16MA_BLUE( p0 );
g10 = UNPACK_16MA_GREEN( p0 );
r10 = UNPACK_16MA_RED( p0 );
p0 = *( snext + x0 + 1 );
a11 = UNPACK_16MA_ALPHA( p0 );
b11 = UNPACK_16MA_BLUE( p0 );
g11 = UNPACK_16MA_GREEN( p0 );
r11 = UNPACK_16MA_RED( p0 );
x0prev = x0;
}
TUint32 invdu = sourceX & ( ( 1 << KDecimalBits ) - 1 ); // decimal
TUint32 du = ( 1 << KDecimalBits ) - invdu; // 1 - decimal part
TUint32 w1 = ( du * dv ) >> KDecimalBits;
TUint32 w2 = ( invdu * dv ) >> KDecimalBits;
TUint32 w3 = ( du * invdv ) >> KDecimalBits;
TUint32 w4 = ( invdu * invdv ) >> KDecimalBits;
TUint32 ares = w1 * a00 + w2 * a01 + w3 * a10 + w4 * a11;
ares += ( 1 << ( KDecimalBits - 1 ) );
TUint32 bres = w1 * b00 + w2 * b01 + w3 * b10 + w4 * b11;
bres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 gres = w1 * g00 + w2 * g01 + w3 * g10 + w4 * g11;
gres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 rres = w1 * r00 + w2 * r01 + w3 * r10 + w4 * r11;
rres += ( 1 << ( KDecimalBits - 1 ) );
*t++ = PACK_16MA_ABGR(
ares >> KDecimalBits,
bres >> KDecimalBits,
gres >> KDecimalBits,
rres >> KDecimalBits );
sourceX += iU;
}
// last columns
for( ; x < width; x++ )
{
TUint32 x0 = sourceX >> KDecimalBits;
// If the source is still same then we don't have to fetch pixels
// from memory and unpack them again
if( x0 != x0prev )
{
TUint32 p0 = *( s + x0 );
a01 = a00 = UNPACK_16MA_ALPHA( p0 );
b01 = b00 = UNPACK_16MA_BLUE( p0 );
g01 = g00 = UNPACK_16MA_GREEN( p0 );
r01 = r00 = UNPACK_16MA_RED( p0 );
p0 = *( snext + x0 );
a11 = a10 = UNPACK_16MA_ALPHA( p0 );
b11 = b10 = UNPACK_16MA_BLUE( p0 );
g11 = g10 = UNPACK_16MA_GREEN( p0 );
r11 = r10 = UNPACK_16MA_RED( p0 );
x0prev = x0;
}
TUint32 invdu = sourceX & ( ( 1 << KDecimalBits ) - 1 ); // decimal
TUint32 du = ( 1 << KDecimalBits ) - invdu; // 1 - decimal part
TUint32 w1 = ( du * dv ) >> KDecimalBits;
TUint32 w2 = ( invdu * dv ) >> KDecimalBits;
TUint32 w3 = ( du * invdv ) >> KDecimalBits;
TUint32 w4 = ( invdu * invdv ) >> KDecimalBits;
TUint32 ares = w1 * a00 + w2 * a01 + w3 * a10 + w4 * a11;
ares += ( 1 << ( KDecimalBits - 1 ) );
TUint32 bres = w1 * b00 + w2 * b01 + w3 * b10 + w4 * b11;
bres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 gres = w1 * g00 + w2 * g01 + w3 * g10 + w4 * g11;
gres += ( 1 << ( KDecimalBits - 1 ) );
TUint32 rres = w1 * r00 + w2 * r01 + w3 * r10 + w4 * r11;
rres += ( 1 << ( KDecimalBits - 1 ) );
*t++ = PACK_16MA_ABGR(
ares >> KDecimalBits,
bres >> KDecimalBits,
gres >> KDecimalBits,
rres >> KDecimalBits );
sourceX += iU;
}
sourceY += iV;
}
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale16MA() <<" ), RThread().Id().operator TUint() ) );
}
// -----------------------------------------------------------------------------
// CVtImageScalerImplBilinear::Scale2x4K64K( TUint32 aMask )
// -----------------------------------------------------------------------------
void CVtImageScalerImplBilinear::Scale2x4K64K( TUint32 aMask )
{
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale2x4K64K() >>" ), RThread().Id().operator TUint() ) );
TInt sheight = iSource->Size().iHeight;
TInt swidth = iSource->Size().iWidth;
TInt spitch = iSource->BytesPerRow();
TInt dpitch = iTarget->BytesPerRow();
TUint32* s = iSource->DataAddress();
TUint32* d = iTarget->DataAddress();
TInt y;
// first average source rows
for( y = 0; y < sheight; y++ )
{
TUint32* s1 = s;
TUint32* d1 = d;
TUint32 p = *s1++; // 2 pixels
TUint32 p1 = p & 0xffff;
TUint32 p2 = ( p >> 16 ) & 0xffff;
TInt x;
for( x = 0; x < swidth/2 - 1; x++ )
{
TUint32 p1a = ( ( ( p1 ^ p2 ) & aMask ) >> 1 ) + ( p1 & p2 );
*d1++ = p1 | ( p1a << 16 );
p = *s1++; // 2 pixels
p1 = p & 0xffff;
TUint32 p2a = ( ( ( p1 ^ p2 ) & aMask ) >> 1 ) + ( p1 & p2 );
*d1++ = p2 | ( p2a << 16 );
p2 = ( p >> 16 ) & 0xffff;
}
TUint32 p1a = ( ( ( p1 ^ p2 ) & aMask ) >> 1 ) + ( p1 & p2 );
*d1++ = p1 | ( p1a << 16 );
if( swidth & 1 )
{
p = *s1; // 2 pixels
p1 = p & 0xffff;
TUint32 p2a = ( ( ( p1 ^ p2 ) & aMask ) >> 1 ) + ( p1 & p2 );
*d1++ = p2 | ( p2a << 16 );
p = *--s1; // 2 pixels
p2 = ( p >> 16 ) & 0xffff;
*d1++ = p1 | ( p1 << 16 );
}
else
{
p = *--s1; // 2 pixels
p2 = ( p >> 16 ) & 0xffff;
*d1++ = p2 | ( p2 << 16 );
}
d = reinterpret_cast< TUint32* >
( reinterpret_cast< TUint8* >( d ) + dpitch * 2 );
s = reinterpret_cast< TUint32* >
( reinterpret_cast< TUint8* >( s ) + spitch );
}
// then average rows between
d = iTarget->DataAddress();
TUint32 mask32bit = aMask | ( aMask << 16 );
for( y = 0; y < sheight - 1; y++ )
{
TUint32* d1 = reinterpret_cast< TUint32* >( d );
TUint32* d2 = reinterpret_cast< TUint32* >
( reinterpret_cast< TUint8* >( d1 ) + dpitch );
TUint32* d3 = reinterpret_cast< TUint32* >
( reinterpret_cast< TUint8* >( d2 ) + dpitch );
for( TInt x = 0; x < swidth; x++ )
{
TUint32 p1 = *d1++;
TUint32 p2 = *d3++;
*d2++ = ( ( ( p1 ^ p2 ) & mask32bit ) >> 1 ) + ( p1 & p2 );
}
d = reinterpret_cast< TUint32* >
( reinterpret_cast< TUint8* >( d ) + dpitch * 2 );
}
// last row is just copy of previous row, because we cannot calculate
// average
Mem::Copy( reinterpret_cast< TUint8* >( d ) + dpitch, d, dpitch );
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale2x4K64K() <<" ), RThread().Id().operator TUint() ) );
}
// -----------------------------------------------------------------------------
// CVtImageScalerImplBilinear::Scale2x16M()
// -----------------------------------------------------------------------------
void CVtImageScalerImplBilinear::Scale2x16M()
{
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale2x16M() >>" ), RThread().Id().operator TUint() ) );
TInt sheight = iSource->Size().iHeight;
TInt swidth = iSource->Size().iWidth;
TInt spitch = iSource->BytesPerRow();
TInt dpitch = iTarget->BytesPerRow();
TUint8* s = reinterpret_cast< TUint8* >( iSource->DataAddress() );
TUint8* d = reinterpret_cast< TUint8* >( iTarget->DataAddress() );
TInt y;
for( y = 0; y < sheight; y++ )
{
TUint8* s2 = s;
TUint8* d1 = d;
TUint32 g1 = 0;
TUint32 b1 = 0;
TUint32 r1 = 0;
TUint32 g2 = 0;
TUint32 b2 = 0;
TUint32 r2 = 0;
for( TInt x = 0; x < swidth - 1; x++ )
{
g1 = *s2++;
b1 = *s2++;
r1 = *s2++;
*d1++ = static_cast< TUint8 >( g1 );
*d1++ = static_cast< TUint8 >( b1 );
*d1++ = static_cast< TUint8 >( r1 );
g2 = s2[ 0 ];
b2 = s2[ 1 ];
r2 = s2[ 2 ];
*d1++ = static_cast< TUint8 >( ( g1 + g2 ) >> 1 );
*d1++ = static_cast< TUint8 >( ( b1 + b2 ) >> 1 );
*d1++ = static_cast< TUint8 >( ( r1 + r2 ) >> 1 );
}
*d1++ = static_cast< TUint8 >( ( g1 + g2 ) >> 1 );
*d1++ = static_cast< TUint8 >( ( b1 + b2 ) >> 1 );
*d1++ = static_cast< TUint8 >( ( r1 + r2 ) >> 1 );
*d1++ = static_cast< TUint8 >( g2 );
*d1++ = static_cast< TUint8 >( b2 );
*d1++ = static_cast< TUint8 >( r2 );
d += dpitch * 2;
s += spitch;
}
// then average rows between
d = reinterpret_cast< TUint8* >( iTarget->DataAddress() );
for( y = 0; y < sheight - 1; y++ )
{
TUint8* d1 = d;
TUint8* d2 = d1 + dpitch;
TUint8* d3 = d2 + dpitch;
for( TInt x = 0; x < swidth; x++ )
{
TUint32 g1 = *d1++;
TUint32 g2 = *d3++;
*d2++ = static_cast< TUint8 >( ( g1 + g2 ) >> 1 );
TUint32 b1 = *d1++;
TUint32 b2 = *d3++;
*d2++ = static_cast< TUint8 >( ( b1 + b2 ) >> 1 );
TUint32 r1 = *d1++;
TUint32 r2 = *d3++;
*d2++ = static_cast< TUint8 >( ( r1 + r2 ) >> 1 );
g1 = *d1++;
g2 = *d3++;
*d2++ = static_cast< TUint8 >( ( g1 + g2 ) >> 1 );
b1 = *d1++;
b2 = *d3++;
*d2++ = static_cast< TUint8 >( ( b1 + b2 ) >> 1 );
r1 = *d1++;
r2 = *d3++;
*d2++ = static_cast< TUint8 >( ( r1 + r2 ) >> 1 );
}
d += dpitch * 2;
}
// last row is just copy of previous row, because we cannot calculate
// average
Mem::Copy( reinterpret_cast< TUint8* >( d ) + dpitch, d, dpitch );
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale2x16M() <<" ), RThread().Id().operator TUint() ) );
}
// -----------------------------------------------------------------------------
// CVtImageScalerImplBilinear::Scale2x16MU16MA()
// -----------------------------------------------------------------------------
void CVtImageScalerImplBilinear::Scale2x16MU16MA()
{
#if defined ( __MARM_ARMI__ ) && defined ( NDEBUG ) && defined ( __USE_ASM_OPTS ) // From urel
asm("stmfd sp!, {r4, r5, r6, r7, r8, r9, sl, r11, r12, lr} ");
asm("ldr r11, .L1_671");
asm("sub sp, sp, #24 ");
asm("mov r6, r0 ");
asm("ldr r1, [r6, #4] ");
asm("ldr r3, [r1, #0] ");
asm("add r0, sp, #16 ");
asm("ldr ip, [r3, #20] ");
asm("mov lr, pc ");
asm("bx ip ");
asm("ldr r7, [sp, #20] ");
asm("ldr r1, [r6, #4] ");
asm("ldr r3, [r1, #0] ");
asm("add r0, sp, #8 ");
asm("ldr ip, [r3, #20] ");
asm("mov lr, pc ");
asm("bx ip ");
asm("ldr r9, [sp, #8] ");
asm("str r9, [sp, #0] ");
asm("ldr r0, [r6, #4] ");
asm("ldr r3, [r0, #0] ");
asm("ldr ip, [r3, #24] ");
asm("mov lr, pc ");
asm("bx ip ");
asm("str r0, [sp, #4] ");
asm("ldr r0, [r6, #8] ");
asm("ldr r3, [r0, #0] ");
asm("ldr ip, [r3, #24] ");
asm("mov lr, pc ");
asm("bx ip ");
asm("mov sl, r0 ");
asm("ldr r0, [r6, #4] ");
asm("ldr r3, [r0, #0] ");
asm("ldr ip, [r3, #28] ");
asm("mov lr, pc ");
asm("bx ip ");
asm("mov r4, r0 ");
asm("ldr r0, [r6, #8] ");
asm("ldr r3, [r0, #0] ");
asm("ldr ip, [r3, #28] ");
asm("mov lr, pc ");
asm("bx ip ");
asm("mov r5, r0 ");
asm("subs r8, r7, #1 ");
asm("bmi .L1_654 ");
asm(" .L1_656: ");
asm("mov ip, r5 ");
asm("mov lr, r4 ");
asm("ldr r1, [lr], #4 ");
asm("ldr r9, [sp, #0] ");
asm("cmp r9, #4");
asm("bhi .L1_658_1");
// picture width lower or equal to 4
asm("subs r0, r9, #2");
asm("bmi .L1_658");
asm("ldr r9, [lr], #4 ");
asm("eor r2, r9, r1 ");
asm("and r2, r2, r11 ");
asm("and r3, r9, r1 ");
asm("add r3, r3, r2, lsr #1 ");
asm("str r1, [ip], #4");
asm("str r3, [ip], #4");
asm("subs r0, r0, #1");
asm("strmi r9, [ip], #4");
asm("strmi r9, [ip], #4");
asm("bmi .L1_658");
asm("ldr r1, [lr], #4 ");
asm("eor r2, r9, r1 ");
asm("and r2, r2, r11 ");
asm("and r3, r9, r1 ");
asm("add r3, r3, r2, lsr #1 ");
asm("str r9, [ip], #4");
asm("str r3, [ip], #4");
asm("subs r0, r0, #1");
asm("strmi r1, [ip], #4");
asm("strmi r1, [ip], #4");
asm("bmi .L1_658");
asm("ldr r9, [lr], #4 ");
asm("eor r2, r9, r1 ");
asm("and r2, r2, r11 ");
asm("and r3, r9, r1 ");
asm("add r3, r3, r2, lsr #1 ");
asm("str r1, [ip], #4");
asm("str r3, [ip], #4");
asm("b .L1_658");
// picture width higher than 4
asm(" .L1_658_1:");
asm("mov r9, r9, lsr #1 ");
asm("subs r0, r9, #2 ");
asm("bmi .L1_658 ");
asm(" .L1_660: ");
asm("ldr r9, [lr], #4 ");
asm("eor r2, r9, r1 ");
asm("and r2, r2, r11 ");
asm("and r3, r9, r1 ");
asm("add r3, r3, r2, lsr #1 ");
asm("stmia ip!, { r1, r3, r9 } ");
asm("sub r0, r0, #1 ");
asm("ldr r1, [lr], #4 ");
asm("eor r2, r9, r1 ");
asm("and r2, r2, r11 ");
asm("and r3, r9, r1 ");
asm("add r3, r3, r2, lsr #1 ");
asm("str r3, [ip], #4");
asm("cmp r0,#0");
asm("bge .L1_660 ");
asm(" .L1_658: ");
asm("str r1, [ip], #4 ");
asm("str r1, [ip, #0] ");
asm("add r5, r5, sl, asl #1 ");
asm("ldr r9, [sp, #4] ");
asm("add r4, r4, r9 ");
asm("subs r8, r8, #1 ");
asm("bpl .L1_656 ");
asm(" .L1_654: ");
asm("ldr r0, [r6, #8] ");
asm("ldr r3, [r0, #0] ");
asm("ldr ip, [r3, #28] ");
asm("mov lr, pc ");
asm("bx ip ");
asm("mov r5, r0 ");
asm("subs r8, r7, #2 ");
asm("bmi .L1_664 ");
asm(" .L1_666: ");
asm("mov r7, r5 ");
asm("add r4, r5, sl ");
asm("add r6, r4, sl ");
asm("ldr r9, [sp, #0] ");
asm("subs lr, r9, #1 ");
asm("bmi .L1_668 ");
asm(" .L1_670: ");
asm("ldr r1, [r7], #4 ");
asm("ldr r2, [r7], #4 ");
asm("ldr r0, [r6], #4 ");
asm("ldr ip, [r6], #4 ");
asm("eor r3, r1, r0 ");
asm("and r3, r3, r11 ");
asm("and r1, r1, r0 ");
asm("add r1, r1, r3, lsr #1 ");
asm("str r1, [r4], #4 ");
asm("eor r3, r2, ip ");
asm("and r3, r3, r11 ");
asm("and r2, r2, ip ");
asm("add r2, r2, r3, lsr #1 ");
asm("str r2, [r4], #4 ");
asm("subs lr, lr, #1 ");
asm("bpl .L1_670 ");
asm(" .L1_668: ");
asm("add r5, r5, sl, asl #1 ");
asm("subs r8, r8, #1 ");
asm("bpl .L1_666 ");
asm(" .L1_664: ");
asm("add r0, r5, sl ");
asm("mov r1, r5 ");
asm("mov r2, sl ");
asm("bl Copy__3MemPvPCvi ");
asm("add sp, sp, #24 ");
asm("ldmfd sp!, {r4, r5, r6, r7, r8, r9, sl, r11, r12, lr} ");
asm("bx lr ");
asm(" .align 0 ");
asm(" .L1_671: ");
asm(" .word 0x00fefefe ");
#else
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale2x16MU16MA() >>" ), RThread().Id().operator TUint() ) );
TInt sheight = iSource->Size().iHeight;
TInt swidth = iSource->Size().iWidth;
TInt spitch = iSource->BytesPerRow();
TInt dpitch = iTarget->BytesPerRow();
TUint32 mask = 0xfefefefe;
TUint32* s = iSource->DataAddress();
TUint32* d = iTarget->DataAddress();
TInt y;
TUint32 p1;
TUint32 p2;
TUint32 p3;
TUint32 p4;
// first average source rows
for( y = sheight - 1; y >= 0; y-- )
{
TUint32* s1 = s;
TUint32* d1 = d;
TUint32 p2 = *s1++;
TUint32 p1 = 0;
for( TInt x = swidth - 2; x >= 0; x-- )
{
*d1++ = p2;
p1 = p2;
p2 = *s1++;
*d1++ = ( ( ( p1 ^ p2 ) & mask ) >> 1 ) + ( p1 & p2 );
}
*d1++ = p2;
*d1++ = p2;
d = reinterpret_cast< TUint32* >
( reinterpret_cast< TUint8* >( d ) + dpitch * 2 );
s = reinterpret_cast< TUint32* >
( reinterpret_cast< TUint8* >( s ) + spitch );
}
// then average rows between
d = iTarget->DataAddress();
for( y = sheight - 2; y >= 0; y-- )
{
TUint32* d1 = reinterpret_cast< TUint32* >( d );
TUint32* d2 = reinterpret_cast< TUint32* >
( reinterpret_cast< TUint8* >( d1 ) + dpitch );
TUint32* d3 = reinterpret_cast< TUint32* >
( reinterpret_cast< TUint8* >( d2 ) + dpitch );
for( TInt x = swidth - 1; x >= 0; x-- )
{
p1 = *d1++;
p2 = *d3++;
*d2++ = ( ( ( p1 ^ p2 ) & mask ) >> 1 ) + ( p1 & p2 );
p3 = *d1++;
p4 = *d3++;
*d2++ = ( ( ( p3 ^ p4 ) & mask ) >> 1 ) + ( p3 & p4 );
}
d = reinterpret_cast< TUint32* >
( reinterpret_cast< TUint8* >( d ) + dpitch * 2 );
}
// last row is just copy of previous row, because we cannot calculate
// average
Mem::Copy( reinterpret_cast< TUint8* >( d ) + dpitch, d, dpitch );
__IF_DEBUG( Print( _L( "ImageScaler [%d]: CVtImageScalerImplBilinear::Scale2x16MU16MA() <<" ), RThread().Id().operator TUint() ) );
#endif
}
// End of File