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/*
* Copyright (C) 2021-2025 Apple Inc. 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 "ShareableBitmapUtilities.h"
#include <WebCore/CachedImage.h>
#include <WebCore/FrameSnapshotting.h>
#include <WebCore/GeometryUtilities.h>
#include <WebCore/GraphicsContext.h>
#include <WebCore/HTMLVideoElement.h>
#include <WebCore/ImageBuffer.h>
#include <WebCore/IntSize.h>
#include <WebCore/LocalFrame.h>
#include <WebCore/NativeImage.h>
#include <WebCore/PlatformScreen.h>
#include <WebCore/RenderElementStyleInlines.h>
#include <WebCore/RenderImage.h>
#include <WebCore/RenderObjectInlines.h>
#include <WebCore/RenderVideo.h>
#include <WebCore/ShareableBitmap.h>
namespace WebKit {
using namespace WebCore;
RefPtr<ShareableBitmap> createShareableBitmap(RenderImage& renderImage, CreateShareableBitmapFromImageOptions&& options)
{
Ref frame = renderImage.frame();
auto colorSpaceForBitmap = screenColorSpace(frame->protectedMainFrame()->protectedVirtualView().get());
if (!renderImage.isRenderMedia() && !renderImage.opacity() && options.useSnapshotForTransparentImages == UseSnapshotForTransparentImages::Yes) {
auto snapshotRect = renderImage.absoluteBoundingBoxRect();
if (snapshotRect.isEmpty())
return { };
OptionSet<SnapshotFlags> snapshotFlags { SnapshotFlags::ExcludeSelectionHighlighting, SnapshotFlags::PaintEverythingExcludingSelection };
auto imageBuffer = snapshotFrameRect(frame.get(), snapshotRect, { snapshotFlags, PixelFormat::BGRA8, DestinationColorSpace::SRGB() });
if (!imageBuffer)
return { };
auto snapshotImage = ImageBuffer::sinkIntoNativeImage(WTF::move(imageBuffer));
if (!snapshotImage)
return { };
auto bitmap = ShareableBitmap::create({ snapshotImage->size(), WTF::move(colorSpaceForBitmap) });
if (!bitmap)
return { };
auto context = bitmap->createGraphicsContext();
if (!context)
return { };
FloatRect imageRect { { }, snapshotImage->size() };
context->drawNativeImage(*snapshotImage, imageRect, imageRect);
return bitmap;
}
#if ENABLE(VIDEO)
if (auto* renderVideo = dynamicDowncast<RenderVideo>(renderImage))
return renderVideo->protectedVideoElement()->bitmapImageForCurrentTime();
#endif // ENABLE(VIDEO)
auto* cachedImage = renderImage.cachedImage();
if (!cachedImage || cachedImage->errorOccurred())
return { };
RefPtr image = cachedImage->imageForRenderer(&renderImage);
if (!image || image->width() <= 1 || image->height() <= 1)
return { };
if (options.allowAnimatedImages == AllowAnimatedImages::No && image->isAnimated())
return { };
auto bitmapSize = cachedImage->imageSizeForRenderer(&renderImage);
if (options.screenSizeInPixels) {
auto scaledSize = largestRectWithAspectRatioInsideRect(bitmapSize.width() / bitmapSize.height(), { FloatPoint(), *options.screenSizeInPixels }).size();
bitmapSize = scaledSize.width() < bitmapSize.width() ? scaledSize : bitmapSize;
}
// FIXME: Only select ExtendedColor on images known to need wide gamut.
auto sharedBitmap = ShareableBitmap::create({ IntSize(bitmapSize), WTF::move(colorSpaceForBitmap) });
if (!sharedBitmap)
return { };
auto graphicsContext = sharedBitmap->createGraphicsContext();
if (!graphicsContext)
return { };
graphicsContext->drawImage(*image, FloatRect(0, 0, bitmapSize.width(), bitmapSize.height()), { renderImage.imageOrientation() });
return sharedBitmap;
}
}
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