KoColorSpace.cpp 12 KB
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/*
 *  Copyright (c) 2005 Boudewijn Rempt <boud@valdyas.org>
 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public License
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 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
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#include <QThreadStorage>
#include <QByteArray>
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#include <QBitArray>
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#include "KoColorSpace.h"
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#include "KoChannelInfo.h"
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#include <kdebug.h>

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#include "KoCompositeOp.h"
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#include "KoColorTransformation.h"
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#include "KoColorConversionSystem.h"
#include "KoColorSpaceRegistry.h"
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struct KoColorSpace::Private {
    QString id;
    QString name;
    QHash<QString, KoCompositeOp *> compositeOps;
    KoColorSpaceRegistry * parent;
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    QList<KoChannelInfo *> channels;
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    KoMixColorsOp* mixColorsOp;
    KoConvolutionOp* convolutionOp;
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    QThreadStorage< QVector<quint8>* > conversionCache;

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    mutable const KoColorSpace *lastUsedDstColorSpace;
    mutable KoColorConversionTransformation* lastUsedTransform;

// cmsHTRANSFORM is a void *, so this should work.
    typedef QMap<const KoColorSpace *, KoColorConversionTransformation*>  TransformMap;
    mutable TransformMap transforms; // Cache for existing transforms

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};

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KoColorSpace::KoColorSpace()
    : d (new Private())
{
}

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KoColorSpace::KoColorSpace(const QString &id, const QString &name, KoColorSpaceRegistry * parent, KoMixColorsOp* mixColorsOp, KoConvolutionOp* convolutionOp )
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    : d (new Private())
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{
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    d->id = id;
    d->name = name;
    d->parent = parent;
    d->mixColorsOp = mixColorsOp;
    d->convolutionOp = convolutionOp;
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    d->lastUsedDstColorSpace = 0;
    d->lastUsedTransform = 0;
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}

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KoColorSpace::~KoColorSpace()
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{
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    delete d->mixColorsOp;
    delete d->convolutionOp;
    delete d;
}

QString KoColorSpace::id() const {return d->id;}

QString KoColorSpace::name() const {return d->name;}

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QList<KoChannelInfo *> KoColorSpace::channels() const
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{
    return d->channels;
}

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QBitArray KoColorSpace::channelFlags(bool color, bool alpha, bool substance, bool substrate) const
{
    QBitArray ba( d->channels.size() );
    if ( !color && !alpha && !substance && !substrate ) return ba;

    for ( int i = 0; i < d->channels.size(); ++i ) {
        KoChannelInfo * channel = d->channels.at( i );
        if ( ( color && channel->channelType() == KoChannelInfo::COLOR ) ||
             ( alpha && channel->channelType() == KoChannelInfo::ALPHA ) ||
             ( substrate && channel->channelType() == KoChannelInfo::SUBSTRATE ) ||
             ( substance && channel->channelType() == KoChannelInfo::SUBSTANCE ) )
            ba.setBit( i, true );
    }
    return ba;
}

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QBitArray KoColorSpace::setChannelFlagsToPixelOrder(const QBitArray & origChannelFlags) const
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{
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    if ( origChannelFlags.isEmpty() ) return origChannelFlags;

    QBitArray orderedChannelFlags( origChannelFlags.size() );
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    for ( int i = 0; i < origChannelFlags.size(); ++i ) {
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        KoChannelInfo * channel = d->channels.at( i );
        orderedChannelFlags.setBit( channel->pos(), origChannelFlags.testBit( i ) );
    }
    return orderedChannelFlags;
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}

QBitArray KoColorSpace::setChannelFlagsToColorSpaceOrder( const QBitArray & origChannelFlags ) const
{
    if ( origChannelFlags.isEmpty() ) return origChannelFlags;

    QBitArray orderedChannelFlags( origChannelFlags.size() );
    for ( int i = 0; i < orderedChannelFlags.size(); ++i )
    {
        KoChannelInfo * channel = d->channels.at( i );
        orderedChannelFlags.setBit( i, origChannelFlags.testBit( channel->pos() ) );
    }
    return orderedChannelFlags;
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}

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void KoColorSpace::addChannel(KoChannelInfo * ci)
{
    d->channels.push_back(ci);
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}

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quint8 *KoColorSpace::allocPixelBuffer(quint32 numPixels) const
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{
    return new quint8[pixelSize()*numPixels];
}

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QList<KoCompositeOp*> KoColorSpace::userVisiblecompositeOps() const
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{
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    return d->compositeOps.values();
}


KoMixColorsOp* KoColorSpace::mixColorsOp() const {
    return d->mixColorsOp;
}


KoConvolutionOp* KoColorSpace::convolutionOp() const {
    return d->convolutionOp;
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}

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const KoCompositeOp * KoColorSpace::compositeOp(const QString & id) const
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{
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    if ( d->compositeOps.contains( id ) )
        return d->compositeOps.value( id );
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    else
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        return d->compositeOps.value( COMPOSITE_OVER );
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}

void KoColorSpace::addCompositeOp(const KoCompositeOp * op)
{
    if ( op->colorSpace()->id() == id()) {
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        d->compositeOps.insert( op->id(), const_cast<KoCompositeOp*>( op ) );
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    }
}

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KoColorConversionTransformation* KoColorSpace::createColorConverter(const KoColorSpace * dstColorSpace, KoColorConversionTransformation::Intent renderingIntent) const
{
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    return d->parent->colorConversionSystem()->createColorConverter( this, dstColorSpace, renderingIntent);
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}

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bool KoColorSpace::convertPixelsTo(const quint8 * src,
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        quint8 * dst,
        const KoColorSpace * dstColorSpace,
        quint32 numPixels,
        KoColorConversionTransformation::Intent renderingIntent) const
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{
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    if (dstColorSpace->id() == this->id()
        && dstColorSpace->profile() == profile())
    {
        if (src!= dst)
            memcpy (dst, src, numPixels * this->pixelSize());

        return true;
    }

    KoColorConversionTransformation* tf = 0;
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    if (d->lastUsedTransform != 0 && d->lastUsedDstColorSpace != 0) {
        if (dstColorSpace->id() == d->lastUsedDstColorSpace->id() &&
            dstColorSpace->profile() == d->lastUsedDstColorSpace->profile()) {
            tf = d->lastUsedTransform;
            }
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    }
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    if (not tf) {

        if (!d->transforms.contains(dstColorSpace)) {
    // XXX: Should we clear the transform cache if it gets too big?
            tf = this->createColorConverter(dstColorSpace, renderingIntent);
            d->transforms[dstColorSpace] = tf;
        }
        else {
            tf = d->transforms[dstColorSpace];
        }

        d->lastUsedTransform = tf;
        d->lastUsedDstColorSpace = dstColorSpace;
    }
    tf->transform(src, dst, numPixels);

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    return true;
}
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void KoColorSpace::bitBlt(quint8 *dst,
                          qint32 dststride,
                          KoColorSpace * srcSpace,
                          const quint8 *src,
                          qint32 srcRowStride,
                          const quint8 *srcAlphaMask,
                          qint32 maskRowStride,
                          quint8 opacity,
                          qint32 rows,
                          qint32 cols,
                          const QString & op,
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                          const QBitArray & channelFlags) const
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{
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    if ( d->compositeOps.contains( op ) ) {
        bitBlt(dst, dststride, srcSpace, src, srcRowStride, srcAlphaMask, maskRowStride, opacity, rows, cols, d->compositeOps.value( op ), channelFlags);
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    }
    else {
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        bitBlt(dst, dststride, srcSpace, src, srcRowStride, srcAlphaMask, maskRowStride, opacity, rows, cols, d->compositeOps.value( COMPOSITE_OVER ), channelFlags);
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    }

}

void KoColorSpace::bitBlt(quint8 *dst,
                          qint32 dststride,
                          KoColorSpace * srcSpace,
                          const quint8 *src,
                          qint32 srcRowStride,
                          const quint8 *srcAlphaMask,
                          qint32 maskRowStride,
                          quint8 opacity,
                          qint32 rows,
                          qint32 cols,
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                          const QString& op) const
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{
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    if ( d->compositeOps.contains( op ) ) {
        bitBlt(dst, dststride, srcSpace, src, srcRowStride, srcAlphaMask, maskRowStride, opacity, rows, cols, d->compositeOps.value( op ));
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    }
    else {
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        bitBlt(dst, dststride, srcSpace, src, srcRowStride, srcAlphaMask, maskRowStride, opacity, rows, cols, d->compositeOps.value( COMPOSITE_OVER ) );
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    }
}
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void KoColorSpace::bitBlt(quint8 *dst,
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                          qint32 dststride,
                          KoColorSpace * srcSpace,
                          const quint8 *src,
                          qint32 srcRowStride,
                          const quint8 *srcAlphaMask,
                          qint32 maskRowStride,
                          quint8 opacity,
                          qint32 rows,
                          qint32 cols,
                          const KoCompositeOp * op,
                          const QBitArray & channelFlags) const
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{
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    Q_ASSERT(op->colorSpace() == this);

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    if (rows <= 0 || cols <= 0)
        return;

    if (this != srcSpace) {
        quint32 len = pixelSize() * rows * cols;

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        QVector<quint8> * conversionCache = threadLocalConversionCache(len);
        quint8* conversionData = conversionCache->data();
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        for (qint32 row = 0; row < rows; row++) {
            srcSpace->convertPixelsTo(src + row * srcRowStride,
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                                      conversionData + row * cols * pixelSize(), this,
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                                      cols);
        }

        // The old srcRowStride is no longer valid because we converted to the current cs
        srcRowStride = cols * pixelSize();

        op->composite( dst, dststride,
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                       conversionData, srcRowStride,
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                       srcAlphaMask, maskRowStride,
                       rows,  cols,
                       opacity, channelFlags );

    }
    else {
        op->composite( dst, dststride,
                       src, srcRowStride,
                       srcAlphaMask, maskRowStride,
                       rows,  cols,
                       opacity, channelFlags );
    }
}

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// XXX: I don't want this code duplication, but also don't want an
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//      extra function call in this critical section of code. What to
//      do?
void KoColorSpace::bitBlt(quint8 *dst,
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                          qint32 dststride,
                          KoColorSpace * srcSpace,
                          const quint8 *src,
                          qint32 srcRowStride,
                          const quint8 *srcAlphaMask,
                          qint32 maskRowStride,
                          quint8 opacity,
                          qint32 rows,
                          qint32 cols,
                          const KoCompositeOp * op) const
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{
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    Q_ASSERT(op->colorSpace() == this);

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    if (rows <= 0 || cols <= 0)
        return;

    if (this != srcSpace) {
        quint32 len = pixelSize() * rows * cols;

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        QVector<quint8> * conversionCache = threadLocalConversionCache(len);
        quint8* conversionData = conversionCache->data();
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        for (qint32 row = 0; row < rows; row++) {
            srcSpace->convertPixelsTo(src + row * srcRowStride,
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                                      conversionData + row * cols * pixelSize(), this,
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                                      cols);
        }

        // The old srcRowStride is no longer valid because we converted to the current cs
        srcRowStride = cols * pixelSize();

        op->composite( dst, dststride,
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                       conversionData, srcRowStride,
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                       srcAlphaMask, maskRowStride,
                       rows,  cols,
                       opacity);

    }
    else {
        op->composite( dst, dststride,
                       src,srcRowStride,
                       srcAlphaMask, maskRowStride,
                       rows,  cols,
                       opacity);
    }
}
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QVector<quint8> * KoColorSpace::threadLocalConversionCache(quint32 size) const
{
    QVector<quint8> * ba = 0;
    if ( !d->conversionCache.hasLocalData() ) {
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        ba = new QVector<quint8>( size, '0' );
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        d->conversionCache.setLocalData( ba );
    }
    else {
        ba = d->conversionCache.localData();
        if ( ( quint8 )ba->size() < size )
            ba->resize( size );
    }
    return ba;
}