Mac-4.7.4/src/3rdparty/webkit/WebCore/platform/graphics/qt/StillImageQt.cpp

/*
 * 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 "IntSize.h"

#include <QPainter>

namespace WebCore {

StillImage::StillImage(const QPixmap& pixmap)
    : m_pixmap(pixmap)
{}

IntSize StillImage::size() const
{
    return IntSize(m_pixmap.width(), m_pixmap.height());
}

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

void StillImage::draw(GraphicsContext* ctxt, const FloatRect& dst,
                      const FloatRect& src, ColorSpace, CompositeOperator op)
{
    if (m_pixmap.isNull())
        return;

    ctxt->save();
    ctxt->setCompositeOperation(op);

    // To support width or height is negative
    float sx = src.x();
    float sy = src.y();
    float sw = src.width();
    float sh = src.height();

    if (sw < 0) {
        sx = sx + sw;
        sw = -sw;
    }

    if (sh < 0) {
        sy = sy + sh;
        sh = -sh;
    }

    float dx = dst.x();
    float dy = dst.y();
    float dw = dst.width();
    float dh = dst.height();

    if (dw < 0) {
        dx = dx + dw;
        dw = -dw;
    }

    if (dh < 0) {
        dy = dy + dh;
        dh = -dh;
    }

    FloatRect srcM(sx, sy, sw, sh);
    FloatRect dstM(dx, dy, dw, dh);
    QPainter* painter(ctxt->platformContext());

    painter->drawPixmap(dstM, m_pixmap, srcM);
    ctxt->restore();
}

}