// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "core/css/cssom/CSSStyleImageValue.h"

namespace blink {

double CSSStyleImageValue::intrinsicWidth(bool& isNull) const
{
    isNull = isCachePending();
    if (isNull)
        return 0;
    return imageLayoutSize().width().toDouble();
}

double CSSStyleImageValue::intrinsicHeight(bool& isNull) const
{
    isNull = isCachePending();
    if (isNull)
        return 0;
    return imageLayoutSize().height().toDouble();
}

double CSSStyleImageValue::intrinsicRatio(bool& isNull)
{
    isNull = isCachePending();
    if (isNull) {
        return 0;
    }
    if (intrinsicHeight(isNull) == 0) {
        isNull = true;
        return 0;
    }
    return intrinsicWidth(isNull) / intrinsicHeight(isNull);
}

FloatSize CSSStyleImageValue::elementSize(const FloatSize& defaultObjectSize) const
{
    bool notUsed;
    return FloatSize(intrinsicWidth(notUsed), intrinsicHeight(notUsed));
}

bool CSSStyleImageValue::isAccelerated() const
{
    return image() && image()->isTextureBacked();
}

int CSSStyleImageValue::sourceHeight()
{
    bool notUsed;
    return intrinsicHeight(notUsed);
}

int CSSStyleImageValue::sourceWidth()
{
    bool notUsed;
    return intrinsicWidth(notUsed);
}

PassRefPtr<Image> CSSStyleImageValue::image() const
{
    if (isCachePending())
        return nullptr;
    // cachedImage can be null if image is StyleInvalidImage
    ImageResource* cachedImage = m_imageValue->cachedImage()->cachedImage();
    if (cachedImage) {
        // getImage() returns the nullImage() if the image is not available yet
        return cachedImage->getImage()->imageForDefaultFrame();
    }
    return nullptr;
}

} // namespace blink