/*
 * Copyright (C) 2008 Holger Hans Peter Freyther
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"
#include "StillImageQt.h"

#include "GraphicsContext.h"
#include "ShadowBlur.h"

#include <QPainter>

namespace WebCore {

StillImage::StillImage(const QPixmap& pixmap)
    : m_pixmap(new QPixmap(pixmap))
    , m_ownsPixmap(true)
{}

StillImage::StillImage(const QPixmap* pixmap)
    : m_pixmap(pixmap)
    , m_ownsPixmap(false)
{}

StillImage::StillImage(QPixmap&& pixmap)
    : m_pixmap(new QPixmap())
    , m_ownsPixmap(true)
{
    const_cast<QPixmap*>(m_pixmap)->swap(pixmap);
}

StillImage::~StillImage()
{
    if (m_ownsPixmap)
        delete m_pixmap;
}

bool StillImage::currentFrameKnownToBeOpaque()
{
    return !m_pixmap->hasAlpha();
}

FloatSize StillImage::size() const
{
    return FloatSize(m_pixmap->width(), m_pixmap->height());
}

PassNativeImagePtr StillImage::nativeImageForCurrentFrame()
{
    return const_cast<PassNativeImagePtr>(m_pixmap);
}

void StillImage::draw(GraphicsContext& ctxt, const FloatRect& dst,
    const FloatRect& src, CompositeOperator op, BlendMode blendMode, ImageOrientationDescription)
{
    if (m_pixmap->isNull())
        return;

    FloatRect normalizedSrc = src.normalized();
    FloatRect normalizedDst = dst.normalized();

    // source rect needs scaling from the device coords to image coords
    normalizedSrc.scale(m_pixmap->devicePixelRatio());

    CompositeOperator previousOperator = ctxt.compositeOperation();
    BlendMode previousBlendMode = ctxt.blendModeOperation();
    ctxt.setCompositeOperation(op, blendMode);

    if (ctxt.hasShadow()) {
        ShadowBlur shadow(ctxt.state());
        GraphicsContext* shadowContext = shadow.beginShadowLayer(ctxt, normalizedDst);
        if (shadowContext) {
            QPainter* shadowPainter = shadowContext->platformContext();
            shadowPainter->drawPixmap(normalizedDst, *m_pixmap, normalizedSrc);
            shadow.endShadowLayer(ctxt);
        }
    }

    ctxt.platformContext()->drawPixmap(normalizedDst, *m_pixmap, normalizedSrc);
    ctxt.setCompositeOperation(previousOperator, previousBlendMode);
}

}