blob: d8a0fda33c851075765c7acf9305a45f8b0c4fb6 [file] [log] [blame]
/*
* Copyright (C) 1999 Lars Knoll <knoll@kde.org>
* Copyright (C) 1999 Antti Koivisto <koivisto@kde.org>
* Copyright (C) 2000 Dirk Mueller <mueller@kde.org>
* Copyright (C) 2006 Allan Sandfeld Jensen <kde@carewolf.com>
* Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009, 2010 Apple Inc.
* All rights reserved.
* Copyright (C) 2010 Google Inc. All rights reserved.
* Copyright (C) 2010 Patrick Gansterer <paroga@paroga.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* 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.
*
*/
#include "core/layout/LayoutImageResource.h"
#include "core/dom/Element.h"
#include "core/layout/LayoutImage.h"
#include "core/page/Page.h"
#include "core/svg/graphics/SVGImageForContainer.h"
namespace blink {
LayoutImageResource::LayoutImageResource()
: layout_object_(nullptr), cached_image_(nullptr) {}
LayoutImageResource::~LayoutImageResource() = default;
void LayoutImageResource::Initialize(LayoutObject* layout_object) {
DCHECK(!layout_object_);
DCHECK(layout_object);
layout_object_ = layout_object;
}
void LayoutImageResource::Shutdown() {
DCHECK(layout_object_);
if (!cached_image_)
return;
cached_image_->RemoveObserver(layout_object_);
}
void LayoutImageResource::SetImageResource(ImageResourceContent* new_image) {
DCHECK(layout_object_);
if (cached_image_ == new_image)
return;
if (cached_image_) {
cached_image_->RemoveObserver(layout_object_);
}
cached_image_ = new_image;
if (cached_image_) {
cached_image_->AddObserver(layout_object_);
if (cached_image_->ErrorOccurred()) {
layout_object_->ImageChanged(
cached_image_.Get(),
ImageResourceObserver::CanDeferInvalidation::kNo);
}
} else {
layout_object_->ImageChanged(
cached_image_.Get(), ImageResourceObserver::CanDeferInvalidation::kNo);
}
}
void LayoutImageResource::ResetAnimation() {
DCHECK(layout_object_);
if (!cached_image_)
return;
cached_image_->GetImage()->ResetAnimation();
layout_object_->SetShouldDoFullPaintInvalidation();
}
bool LayoutImageResource::ImageHasRelativeSize() const {
return cached_image_ && cached_image_->GetImage()->HasRelativeSize();
}
FloatSize LayoutImageResource::ImageSize(float multiplier) const {
if (!cached_image_)
return FloatSize();
FloatSize size(cached_image_->IntrinsicSize(
LayoutObject::ShouldRespectImageOrientation(layout_object_)));
if (multiplier != 1 && !ImageHasRelativeSize()) {
// Don't let images that have a width/height >= 1 shrink below 1 when
// zoomed.
FloatSize minimum_size(size.Width() > 0 ? 1 : 0, size.Height() > 0 ? 1 : 0);
size.Scale(multiplier);
if (size.Width() < minimum_size.Width())
size.SetWidth(minimum_size.Width());
if (size.Height() < minimum_size.Height())
size.SetHeight(minimum_size.Height());
}
if (layout_object_ && layout_object_->IsLayoutImage() && size.Width() &&
size.Height())
size.Scale(ToLayoutImage(layout_object_)->ImageDevicePixelRatio());
return size;
}
float LayoutImageResource::DeviceScaleFactor() const {
return DeviceScaleFactorDeprecated(layout_object_->GetFrame());
}
Image* LayoutImageResource::BrokenImage(float device_scale_factor) {
// TODO(schenney): Replace static resources with dynamically
// generated ones, to support a wider range of device scale factors.
if (device_scale_factor >= 2) {
DEFINE_STATIC_REF(Image, broken_image_hi_res,
(Image::LoadPlatformResource("missingImage@2x")));
return broken_image_hi_res;
}
DEFINE_STATIC_REF(Image, broken_image_lo_res,
(Image::LoadPlatformResource("missingImage")));
return broken_image_lo_res;
}
void LayoutImageResource::UseBrokenImage() {
SetImageResource(
ImageResourceContent::CreateLoaded(BrokenImage(DeviceScaleFactor())));
}
scoped_refptr<Image> LayoutImageResource::GetImage(
const LayoutSize& container_size) const {
if (!cached_image_)
return Image::NullImage();
if (cached_image_->ErrorOccurred())
return BrokenImage(DeviceScaleFactor());
if (!cached_image_->HasImage())
return Image::NullImage();
Image* image = cached_image_->GetImage();
if (!image->IsSVGImage())
return image;
KURL url;
Node* node = layout_object_->GetNode();
if (node && node->IsElementNode()) {
const AtomicString& url_string = ToElement(node)->ImageSourceURL();
url = node->GetDocument().CompleteURL(url_string);
}
return SVGImageForContainer::Create(
ToSVGImage(image), container_size,
layout_object_->StyleRef().EffectiveZoom(), url);
}
bool LayoutImageResource::MaybeAnimated() const {
Image* image = cached_image_ ? cached_image_->GetImage() : Image::NullImage();
return image->MaybeAnimated();
}
} // namespace blink