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/*
* Copyright (C) 2017 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 "ImageBitmap.h"
#include "BitmapImage.h"
#include "Blob.h"
#include "CSSStyleImageValue.h"
#include "CachedImage.h"
#include "ExceptionCode.h"
#include "ExceptionOr.h"
#include "FileReaderLoader.h"
#include "FileReaderLoaderClient.h"
#include "FrameView.h"
#include "GraphicsContext.h"
#include "HTMLCanvasElement.h"
#include "HTMLImageElement.h"
#include "HTMLVideoElement.h"
#include "ImageBitmapOptions.h"
#include "ImageBuffer.h"
#include "ImageData.h"
#include "IntRect.h"
#include "JSDOMPromiseDeferred.h"
#include "JSImageBitmap.h"
#include "LayoutSize.h"
#if ENABLE(OFFSCREEN_CANVAS)
#include "OffscreenCanvas.h"
#endif
#include "RenderElement.h"
#include "SharedBuffer.h"
#include "SuspendableTimer.h"
#include <variant>
#include <wtf/IsoMallocInlines.h>
#include <wtf/Scope.h>
#include <wtf/StdLibExtras.h>
namespace WebCore {
WTF_MAKE_ISO_ALLOCATED_IMPL(ImageBitmap);
#if USE(IOSURFACE_CANVAS_BACKING_STORE)
static RenderingMode bufferRenderingMode = RenderingMode::Accelerated;
#else
static RenderingMode bufferRenderingMode = RenderingMode::Unaccelerated;
#endif
Ref<ImageBitmap> ImageBitmap::create(ScriptExecutionContext& scriptExecutionContext, const IntSize& size, DestinationColorSpace colorSpace)
{
return create({ createImageBuffer(scriptExecutionContext, size, bufferRenderingMode, colorSpace) });
}
Ref<ImageBitmap> ImageBitmap::create(std::optional<ImageBitmapBacking>&& backingStore)
{
return adoptRef(*new ImageBitmap(WTFMove(backingStore)));
}
RefPtr<ImageBuffer> ImageBitmap::createImageBuffer(ScriptExecutionContext& scriptExecutionContext, const FloatSize& size, RenderingMode renderingMode, DestinationColorSpace colorSpace, float resolutionScale)
{
// FIXME: Should avoid converting color space and pixel format of image sources.
auto imageBufferColorSpace = colorSpace.asRGB();
if (!imageBufferColorSpace) {
#if ENABLE(DESTINATION_COLOR_SPACE_DISPLAY_P3)
imageBufferColorSpace = DestinationColorSpace::DisplayP3();
#else
imageBufferColorSpace = DestinationColorSpace::SRGB();
#endif
}
if (scriptExecutionContext.isDocument()) {
auto& document = downcast<Document>(scriptExecutionContext);
if (document.view() && document.view()->root()) {
auto hostWindow = document.view()->root()->hostWindow();
return ImageBuffer::create(size, renderingMode, ShouldUseDisplayList::No, RenderingPurpose::Canvas, resolutionScale, *imageBufferColorSpace, PixelFormat::BGRA8, hostWindow);
}
}
// FIXME <https://webkit.org/b/218482> Enable worker based ImageBitmap and OffscreenCanvas drawing to use GPU Process rendering
return ImageBuffer::create(size, renderingMode, resolutionScale, *imageBufferColorSpace, PixelFormat::BGRA8);
}
void ImageBitmap::createPromise(ScriptExecutionContext& scriptExecutionContext, ImageBitmap::Source&& source, ImageBitmapOptions&& options, ImageBitmap::Promise&& promise)
{
WTF::switchOn(source,
[&] (auto& specificSource) {
createPromise(scriptExecutionContext, specificSource, WTFMove(options), std::nullopt, WTFMove(promise));
}
);
}
Vector<std::optional<ImageBitmapBacking>> ImageBitmap::detachBitmaps(Vector<RefPtr<ImageBitmap>>&& bitmaps)
{
Vector<std::optional<ImageBitmapBacking>> buffers;
for (auto& bitmap : bitmaps)
buffers.append(bitmap->takeImageBitmapBacking());
return buffers;
}
void ImageBitmap::createPromise(ScriptExecutionContext& scriptExecutionContext, ImageBitmap::Source&& source, ImageBitmapOptions&& options, int sx, int sy, int sw, int sh, ImageBitmap::Promise&& promise)
{
// 1. If either the sw or sh arguments are specified but zero, return a promise
// rejected with an "RangeError" DOMException and abort these steps.
if (!sw || !sh) {
promise.reject(RangeError, "Cannot create ImageBitmap with a width or height of 0");
return;
}
auto left = sw >= 0 ? sx : sx + sw;
auto top = sh >= 0 ? sy : sy + sh;
auto width = std::abs(sw);
auto height = std::abs(sh);
WTF::switchOn(source,
[&] (auto& specificSource) {
createPromise(scriptExecutionContext, specificSource, WTFMove(options), IntRect { left, top, width, height }, WTFMove(promise));
}
);
}
static bool taintsOrigin(CachedImage& cachedImage)
{
auto* image = cachedImage.image();
if (!image)
return false;
if (image->sourceURL().protocolIsData())
return false;
if (!image->hasSingleSecurityOrigin())
return true;
if (!cachedImage.isCORSSameOrigin())
return true;
return false;
}
#if ENABLE(VIDEO)
static bool taintsOrigin(SecurityOrigin* origin, HTMLVideoElement& video)
{
if (!video.hasSingleSecurityOrigin())
return true;
if (video.player()->didPassCORSAccessCheck())
return false;
auto url = video.currentSrc();
if (url.protocolIsData())
return false;
return !origin->canRequest(url);
}
#endif
// https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#cropped-to-the-source-rectangle-with-formatting
static ExceptionOr<IntRect> croppedSourceRectangleWithFormatting(IntSize inputSize, ImageBitmapOptions& options, std::optional<IntRect> rect)
{
// 2. If either or both of resizeWidth and resizeHeight members of options are less
// than or equal to 0, then return a promise rejected with "InvalidStateError"
// DOMException and abort these steps.
if ((options.resizeWidth && options.resizeWidth.value() <= 0) || (options.resizeHeight && options.resizeHeight.value() <= 0))
return Exception { InvalidStateError, "Invalid resize dimensions" };
// 3. If sx, sy, sw and sh are specified, let sourceRectangle be a rectangle whose
// corners are the four points (sx, sy), (sx+sw, sy),(sx+sw, sy+sh), (sx,sy+sh).
// Otherwise let sourceRectangle be a rectangle whose corners are the four points
// (0,0), (width of input, 0), (width of input, height of input), (0, height of
// input).
auto sourceRectangle = rect.value_or(IntRect { 0, 0, inputSize.width(), inputSize.height() });
// 4. Clip sourceRectangle to the dimensions of input.
sourceRectangle.intersect(IntRect { 0, 0, inputSize.width(), inputSize.height() });
return { WTFMove(sourceRectangle) };
}
static IntSize outputSizeForSourceRectangle(IntRect sourceRectangle, ImageBitmapOptions& options)
{
// 5. Let outputWidth be determined as follows:
auto outputWidth = [&] () -> int {
if (options.resizeWidth)
return options.resizeWidth.value();
if (options.resizeHeight)
return ceil(sourceRectangle.width() * static_cast<double>(options.resizeHeight.value()) / sourceRectangle.height());
return sourceRectangle.width();
}();
// 6. Let outputHeight be determined as follows:
auto outputHeight = [&] () -> int {
if (options.resizeHeight)
return options.resizeHeight.value();
if (options.resizeWidth)
return ceil(sourceRectangle.height() * static_cast<double>(options.resizeWidth.value()) / sourceRectangle.width());
return sourceRectangle.height();
}();
return { outputWidth, outputHeight };
}
static InterpolationQuality interpolationQualityForResizeQuality(ImageBitmapOptions::ResizeQuality resizeQuality)
{
switch (resizeQuality) {
case ImageBitmapOptions::ResizeQuality::Pixelated:
return InterpolationQuality::DoNotInterpolate;
case ImageBitmapOptions::ResizeQuality::Low:
return InterpolationQuality::Default; // Low is the default.
case ImageBitmapOptions::ResizeQuality::Medium:
return InterpolationQuality::Medium;
case ImageBitmapOptions::ResizeQuality::High:
return InterpolationQuality::High;
}
ASSERT_NOT_REACHED();
return InterpolationQuality::Default;
}
static AlphaPremultiplication alphaPremultiplicationForPremultiplyAlpha(ImageBitmapOptions::PremultiplyAlpha premultiplyAlpha)
{
// The default is to premultiply - this is the least surprising behavior.
if (premultiplyAlpha == ImageBitmapOptions::PremultiplyAlpha::None)
return AlphaPremultiplication::Unpremultiplied;
return AlphaPremultiplication::Premultiplied;
}
void ImageBitmap::resolveWithBlankImageBuffer(ScriptExecutionContext& scriptExecutionContext, bool originClean, Promise&& promise)
{
// Source rectangle likely doesn't intersect the source image.
// Behavior isn't well specified, but WPT tests expect no Promise rejection (and of course no crashes).
// Resolve Promise with a blank 1x1 ImageBitmap.
auto bitmapData = createImageBuffer(scriptExecutionContext, FloatSize(1, 1), bufferRenderingMode, DestinationColorSpace::SRGB());
// 9. If the origin of image's image is not the same origin as the origin specified by the
// entry settings object, then set the origin-clean flag of the ImageBitmap object's
// bitmap to false.
OptionSet<SerializationState> serializationState;
if (originClean)
serializationState.add(SerializationState::OriginClean);
// 7. Create a new ImageBitmap object.
auto imageBitmap = create(ImageBitmapBacking(WTFMove(bitmapData), serializationState));
// 10. Return a new promise, but continue running these steps in parallel.
// 11. Resolve the promise with the new ImageBitmap object as the value.
promise.resolve(WTFMove(imageBitmap));
}
// FIXME: More steps from https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#cropped-to-the-source-rectangle-with-formatting
// 7. Place input on an infinite transparent black grid plane, positioned so that its
// top left corner is at the origin of the plane, with the x-coordinate increasing
// to the right, and the y-coordinate increasing down, and with each pixel in the
// input image data occupying a cell on the plane's grid.
// 8. Let output be the rectangle on the plane denoted by sourceRectangle.
// 9. Scale output to the size specified by outputWidth and outputHeight. The user
// agent should use the value of the resizeQuality option to guide the choice of
// scaling algorithm.
// 10. If the value of the imageOrientation member of options is "flipY", output must
// be flipped vertically, disregarding any image orientation metadata of the source
// (such as EXIF metadata), if any.
// 11. If image is an img element or a Blob object, let val be the value of the
// colorSpaceConversion member of options, and then run these substeps:
//
// 1. If val is "default", the color space conversion behavior is implementation-specific,
// and should be chosen according to the color space that the implementation uses for
// drawing images onto the canvas.
//
// 2. If val is "none", output must be decoded without performing any color space
// conversions. This means that the image decoding algorithm must ignore color profile
// metadata embedded in the source data as well as the display device color profile.
// 12. Let val be the value of premultiplyAlpha member of options, and then run these substeps:
//
// 1. If val is "default", the alpha premultiplication behavior is implementation-specific,
// and should be chosen according to implementation deems optimal for drawing images
// onto the canvas.
//
// 2. If val is "premultiply", the output that is not premultiplied by alpha must have its
// color components multiplied by alpha and that is premultiplied by alpha must be left
// untouched.
//
// 3. If val is "none", the output that is not premultiplied by alpha must be left untouched
// and that is premultiplied by alpha must have its color components divided by alpha.
// 13. Return output.
void ImageBitmap::createPromise(ScriptExecutionContext& scriptExecutionContext, RefPtr<HTMLImageElement>& imageElement, ImageBitmapOptions&& options, std::optional<IntRect> rect, ImageBitmap::Promise&& promise)
{
// 2. If image is not completely available, then return a promise rejected with
// an "InvalidStateError" DOMException and abort these steps.
auto* cachedImage = imageElement->cachedImage();
if (!cachedImage || !imageElement->complete()) {
promise.reject(InvalidStateError, "Cannot create ImageBitmap that is not completely available");
return;
}
// 3. If image's media data has no intrinsic dimensions (e.g. it's a vector graphic
// with no specified content size), and both or either of the resizeWidth and
// resizeHeight options are not specified, then return a promise rejected with
// an "InvalidStateError" DOMException and abort these steps.
auto imageSize = cachedImage->imageSizeForRenderer(imageElement->renderer(), 1.0f);
if ((!imageSize.width() || !imageSize.height()) && (!options.resizeWidth || !options.resizeHeight)) {
promise.reject(InvalidStateError, "Cannot create ImageBitmap from a source with no intrinsic size without providing resize dimensions");
return;
}
// 4. If image's media data has no intrinsic dimensions (e.g. it's a vector graphics
// with no specified content size), it should be rendered to a bitmap of the size
// specified by the resizeWidth and the resizeHeight options.
if (!imageSize.width() && !imageSize.height()) {
imageSize.setWidth(options.resizeWidth.value());
imageSize.setHeight(options.resizeHeight.value());
}
// 5. If the sw and sh arguments are not specified and image's media data has both or
// either of its intrinsic width and intrinsic height values equal to 0, then return
// a promise rejected with an "InvalidStateError" DOMException and abort these steps.
// 6. If the sh argument is not specified and image's media data has an intrinsic height
// of 0, then return a promise rejected with an "InvalidStateError" DOMException and
// abort these steps.
// FIXME: It's unclear how these steps can happen, since step 4 required setting a
// width and height for the image.
if (!rect && (!imageSize.width() || !imageSize.height())) {
promise.reject(InvalidStateError, "Cannot create ImageBitmap from a source with no intrinsic size without providing dimensions");
return;
}
// 8. Let the ImageBitmap object's bitmap data be a copy of image's media data, cropped to
// the source rectangle with formatting. If this is an animated image, the ImageBitmap
// object's bitmap data must only be taken from the default image of the animation (the
// one that the format defines is to be used when animation is not supported or is disabled),
// or, if there is no such image, the first frame of the animation.
auto sourceRectangle = croppedSourceRectangleWithFormatting(roundedIntSize(imageSize), options, WTFMove(rect));
if (sourceRectangle.hasException()) {
promise.reject(sourceRectangle.releaseException());
return;
}
auto imageForRenderer = cachedImage->imageForRenderer(imageElement->renderer());
if (!imageForRenderer) {
promise.reject(InvalidStateError, "Cannot create ImageBitmap from image that can't be rendered");
return;
}
auto outputSize = outputSizeForSourceRectangle(sourceRectangle.returnValue(), options);
auto bitmapData = createImageBuffer(scriptExecutionContext, outputSize, bufferRenderingMode, imageForRenderer->colorSpace());
if (!bitmapData) {
resolveWithBlankImageBuffer(scriptExecutionContext, !taintsOrigin(*cachedImage), WTFMove(promise));
return;
}
auto orientation = imageForRenderer->orientation();
if (orientation == ImageOrientation::FromImage)
orientation = ImageOrientation::None;
FloatRect destRect(FloatPoint(), outputSize);
bitmapData->context().drawImage(*imageForRenderer, destRect, sourceRectangle.releaseReturnValue(), { interpolationQualityForResizeQuality(options.resizeQuality), options.resolvedImageOrientation(orientation) });
// 9. If the origin of image's image is not the same origin as the origin specified by the
// entry settings object, then set the origin-clean flag of the ImageBitmap object's
// bitmap to false.
OptionSet<SerializationState> serializationState;
if (!taintsOrigin(*cachedImage))
serializationState.add(SerializationState::OriginClean);
if (alphaPremultiplicationForPremultiplyAlpha(options.premultiplyAlpha) == AlphaPremultiplication::Premultiplied)
serializationState.add(SerializationState::PremultiplyAlpha);
// 7. Create a new ImageBitmap object.
auto imageBitmap = create(ImageBitmapBacking(WTFMove(bitmapData), serializationState));
// 10. Return a new promise, but continue running these steps in parallel.
// 11. Resolve the promise with the new ImageBitmap object as the value.
promise.resolve(WTFMove(imageBitmap));
}
void ImageBitmap::createPromise(ScriptExecutionContext& scriptExecutionContext, RefPtr<HTMLCanvasElement>& canvasElement, ImageBitmapOptions&& options, std::optional<IntRect> rect, ImageBitmap::Promise&& promise)
{
createPromise(scriptExecutionContext, *canvasElement, WTFMove(options), WTFMove(rect), WTFMove(promise));
}
#if ENABLE(OFFSCREEN_CANVAS)
void ImageBitmap::createPromise(ScriptExecutionContext& scriptExecutionContext, RefPtr<OffscreenCanvas>& canvasElement, ImageBitmapOptions&& options, std::optional<IntRect> rect, ImageBitmap::Promise&& promise)
{
createPromise(scriptExecutionContext, *canvasElement, WTFMove(options), WTFMove(rect), WTFMove(promise));
}
#endif
void ImageBitmap::createPromise(ScriptExecutionContext& scriptExecutionContext, CanvasBase& canvas, ImageBitmapOptions&& options, std::optional<IntRect> rect, ImageBitmap::Promise&& promise)
{
// 2. If the canvas element's bitmap has either a horizontal dimension or a vertical
// dimension equal to zero, then return a promise rejected with an "InvalidStateError"
// DOMException and abort these steps.
auto size = canvas.size();
if (!size.width() || !size.height()) {
promise.reject(InvalidStateError, "Cannot create ImageBitmap from a canvas that has zero width or height");
return;
}
// 4. Let the ImageBitmap object's bitmap data be a copy of the canvas element's bitmap
// data, cropped to the source rectangle with formatting.
auto sourceRectangle = croppedSourceRectangleWithFormatting(size, options, WTFMove(rect));
if (sourceRectangle.hasException()) {
promise.reject(sourceRectangle.releaseException());
return;
}
auto imageForRender = canvas.copiedImage();
if (!imageForRender) {
promise.reject(InvalidStateError, "Cannot create ImageBitmap from canvas that can't be rendered");
return;
}
auto outputSize = outputSizeForSourceRectangle(sourceRectangle.returnValue(), options);
auto bitmapData = createImageBuffer(scriptExecutionContext, outputSize, bufferRenderingMode, imageForRender->colorSpace());
if (!bitmapData) {
resolveWithBlankImageBuffer(scriptExecutionContext, canvas.originClean(), WTFMove(promise));
return;
}
FloatRect destRect(FloatPoint(), outputSize);
bitmapData->context().drawImage(*imageForRender, destRect, sourceRectangle.releaseReturnValue(), { interpolationQualityForResizeQuality(options.resizeQuality), options.resolvedImageOrientation(ImageOrientation::None) });
// 5. Set the origin-clean flag of the ImageBitmap object's bitmap to the same value as
// the origin-clean flag of the canvas element's bitmap.
OptionSet<SerializationState> serializationState;
if (canvas.originClean())
serializationState.add(SerializationState::OriginClean);
if (alphaPremultiplicationForPremultiplyAlpha(options.premultiplyAlpha) == AlphaPremultiplication::Premultiplied)
serializationState.add(SerializationState::PremultiplyAlpha);
// 3. Create a new ImageBitmap object.
auto imageBitmap = create(ImageBitmapBacking(WTFMove(bitmapData), serializationState));
// 6. Return a new promise, but continue running these steps in parallel.
// 7. Resolve the promise with the new ImageBitmap object as the value.
promise.resolve(WTFMove(imageBitmap));
}
#if ENABLE(VIDEO)
void ImageBitmap::createPromise(ScriptExecutionContext& scriptExecutionContext, RefPtr<HTMLVideoElement>& video, ImageBitmapOptions&& options, std::optional<IntRect> rect, ImageBitmap::Promise&& promise)
{
// https://html.spec.whatwg.org/multipage/#dom-createimagebitmap
// WHATWG HTML 2102913b313078cd8eeac7e81e6a8756cbd3e773
// Steps 3-7.
// (Step 3 is handled in croppedSourceRectangleWithFormatting.)
// 4. Check the usability of the image argument. If this throws an exception
// or returns bad, then return p rejected with an "InvalidStateError"
// DOMException.
if (video->readyState() == HTMLMediaElement::HAVE_NOTHING || video->readyState() == HTMLMediaElement::HAVE_METADATA) {
promise.reject(InvalidStateError, "Cannot create ImageBitmap before the HTMLVideoElement has data");
return;
}
// 6.1. If image's networkState attribute is NETWORK_EMPTY, then return p
// rejected with an "InvalidStateError" DOMException.
if (video->networkState() == HTMLMediaElement::NETWORK_EMPTY) {
promise.reject(InvalidStateError, "Cannot create ImageBitmap before the HTMLVideoElement has data");
return;
}
// 6.2. Set imageBitmap's bitmap data to a copy of the frame at the current
// playback position, at the media resource's intrinsic width and
// intrinsic height (i.e., after any aspect-ratio correction has been
// applied), cropped to the source rectangle with formatting.
auto size = video->player() ? roundedIntSize(video->player()->naturalSize()) : IntSize();
auto maybeSourceRectangle = croppedSourceRectangleWithFormatting(size, options, WTFMove(rect));
if (maybeSourceRectangle.hasException()) {
promise.reject(maybeSourceRectangle.releaseException());
return;
}
auto sourceRectangle = maybeSourceRectangle.releaseReturnValue();
auto outputSize = outputSizeForSourceRectangle(sourceRectangle, options);
auto colorSpace = video->colorSpace();
if (!colorSpace)
colorSpace = DestinationColorSpace::SRGB();
// FIXME: Add support for pixel formats to ImageBitmap.
auto bitmapData = video->createBufferForPainting(outputSize, bufferRenderingMode, *colorSpace, PixelFormat::BGRA8);
if (!bitmapData) {
resolveWithBlankImageBuffer(scriptExecutionContext, !taintsOrigin(scriptExecutionContext.securityOrigin(), *video), WTFMove(promise));
return;
}
{
GraphicsContext& c = bitmapData->context();
GraphicsContextStateSaver stateSaver(c);
c.clip(FloatRect(FloatPoint(), outputSize));
auto scaleX = float(outputSize.width()) / float(sourceRectangle.width());
auto scaleY = float(outputSize.height()) / float(sourceRectangle.height());
if (options.orientation == ImageBitmapOptions::Orientation::FlipY) {
c.scale(FloatSize(scaleX, -scaleY));
c.translate(IntPoint(-sourceRectangle.location().x(), sourceRectangle.location().y() - outputSize.height()));
} else {
c.scale(FloatSize(scaleX, scaleY));
c.translate(-sourceRectangle.location());
}
video->paintCurrentFrameInContext(c, FloatRect(FloatPoint(), size));
}
// 6.3. If the origin of image's video is not same origin with entry
// settings object's origin, then set the origin-clean flag of
// image's bitmap to false.
OptionSet<SerializationState> serializationState;
if (!taintsOrigin(scriptExecutionContext.securityOrigin(), *video))
serializationState.add(SerializationState::OriginClean);
if (alphaPremultiplicationForPremultiplyAlpha(options.premultiplyAlpha) == AlphaPremultiplication::Premultiplied)
serializationState.add(SerializationState::PremultiplyAlpha);
// 5. Let imageBitmap be a new ImageBitmap object.
auto imageBitmap = create(ImageBitmapBacking(WTFMove(bitmapData), serializationState));
// 6.4.1. Resolve p with imageBitmap.
promise.resolve(WTFMove(imageBitmap));
}
#endif
#if ENABLE(CSS_TYPED_OM)
void ImageBitmap::createPromise(ScriptExecutionContext&, RefPtr<CSSStyleImageValue>&, ImageBitmapOptions&&, std::optional<IntRect>, ImageBitmap::Promise&& promise)
{
promise.reject(InvalidStateError, "Not implemented");
}
#endif
void ImageBitmap::createPromise(ScriptExecutionContext& scriptExecutionContext, RefPtr<ImageBitmap>& existingImageBitmap, ImageBitmapOptions&& options, std::optional<IntRect> rect, ImageBitmap::Promise&& promise)
{
// 2. If image's [[Detached]] internal slot value is true, return a promise
// rejected with an "InvalidStateError" DOMException and abort these steps.
if (existingImageBitmap->isDetached() || !existingImageBitmap->buffer()) {
promise.reject(InvalidStateError, "Cannot create ImageBitmap from a detached ImageBitmap");
return;
}
// 4. Let the ImageBitmap object's bitmap data be a copy of the image argument's
// bitmap data, cropped to the source rectangle with formatting.
auto sourceRectangle = croppedSourceRectangleWithFormatting(existingImageBitmap->buffer()->truncatedLogicalSize(), options, WTFMove(rect));
if (sourceRectangle.hasException()) {
promise.reject(sourceRectangle.releaseException());
return;
}
auto outputSize = outputSizeForSourceRectangle(sourceRectangle.returnValue(), options);
auto bitmapData = createImageBuffer(scriptExecutionContext, outputSize, bufferRenderingMode, existingImageBitmap->buffer()->colorSpace());
if (!bitmapData) {
resolveWithBlankImageBuffer(scriptExecutionContext, existingImageBitmap->originClean(), WTFMove(promise));
return;
}
auto imageForRender = existingImageBitmap->buffer()->copyImage();
FloatRect destRect(FloatPoint(), outputSize);
bitmapData->context().drawImage(*imageForRender, destRect, sourceRectangle.releaseReturnValue(), { interpolationQualityForResizeQuality(options.resizeQuality), options.resolvedImageOrientation(ImageOrientation::None) });
// 5. Set the origin-clean flag of the ImageBitmap object's bitmap to the same
// value as the origin-clean flag of the bitmap of the image argument.
OptionSet<SerializationState> serializationState;
if (existingImageBitmap->originClean())
serializationState.add(SerializationState::OriginClean);
if (alphaPremultiplicationForPremultiplyAlpha(options.premultiplyAlpha) == AlphaPremultiplication::Premultiplied) {
serializationState.add(SerializationState::PremultiplyAlpha);
// At least in the Core Graphics backend, when creating an ImageBitmap from
// an ImageBitmap, the alpha channel of bitmapData isn't premultiplied even
// though the alpha mode of the internal surface claims it is. Instruct
// users of this ImageBitmap to ignore the internal surface's alpha mode.
serializationState.add(SerializationState::ForciblyPremultiplyAlpha);
}
// 3. Create a new ImageBitmap object.
auto imageBitmap = create(ImageBitmapBacking(WTFMove(bitmapData), serializationState));
// 6. Return a new promise, but continue running these steps in parallel.
// 7. Resolve the promise with the new ImageBitmap object as the value.
promise.resolve(WTFMove(imageBitmap));
}
class ImageBitmapImageObserver final : public RefCounted<ImageBitmapImageObserver>, public ImageObserver {
public:
static Ref<ImageBitmapImageObserver> create(String mimeType, long long expectedContentLength, const URL& sourceUrl)
{
return adoptRef(*new ImageBitmapImageObserver(mimeType, expectedContentLength, sourceUrl));
}
URL sourceUrl() const override { return m_sourceUrl; }
String mimeType() const override { return m_mimeType; }
long long expectedContentLength() const override { return m_expectedContentLength; }
void decodedSizeChanged(const Image&, long long) override { }
void didDraw(const Image&) override { }
bool canDestroyDecodedData(const Image&) override { return true; }
void imageFrameAvailable(const Image&, ImageAnimatingState, const IntRect* = nullptr, DecodingStatus = DecodingStatus::Invalid) override { }
void changedInRect(const Image&, const IntRect* = nullptr) override { }
void scheduleRenderingUpdate(const Image&) override { }
private:
ImageBitmapImageObserver(String mimeType, long long expectedContentLength, const URL& sourceUrl)
: m_mimeType(mimeType)
, m_expectedContentLength(expectedContentLength)
, m_sourceUrl(sourceUrl)
{ }
String m_mimeType;
long long m_expectedContentLength;
URL m_sourceUrl;
};
class PendingImageBitmap final : public ActiveDOMObject, public FileReaderLoaderClient {
WTF_MAKE_FAST_ALLOCATED;
public:
static void fetch(ScriptExecutionContext& scriptExecutionContext, RefPtr<Blob>&& blob, ImageBitmapOptions&& options, std::optional<IntRect> rect, ImageBitmap::Promise&& promise)
{
if (scriptExecutionContext.activeDOMObjectsAreStopped())
return;
auto pendingImageBitmap = new PendingImageBitmap(scriptExecutionContext, WTFMove(blob), WTFMove(options), WTFMove(rect), WTFMove(promise));
pendingImageBitmap->start(scriptExecutionContext);
}
private:
PendingImageBitmap(ScriptExecutionContext& scriptExecutionContext, RefPtr<Blob>&& blob, ImageBitmapOptions&& options, std::optional<IntRect> rect, ImageBitmap::Promise&& promise)
: ActiveDOMObject(&scriptExecutionContext)
, m_blobLoader(FileReaderLoader::ReadAsArrayBuffer, this)
, m_blob(WTFMove(blob))
, m_options(WTFMove(options))
, m_rect(WTFMove(rect))
, m_promise(WTFMove(promise))
, m_createImageBitmapTimer(&scriptExecutionContext, *this, &PendingImageBitmap::createImageBitmapAndResolvePromise)
{
suspendIfNeeded();
m_createImageBitmapTimer.suspendIfNeeded();
}
void start(ScriptExecutionContext& scriptExecutionContext)
{
m_blobLoader.start(&scriptExecutionContext, *m_blob);
}
// ActiveDOMObject
const char* activeDOMObjectName() const final
{
return "PendingImageBitmap";
}
void stop() final
{
delete this;
}
// FileReaderLoaderClient
void didStartLoading() override
{
}
void didReceiveData() override
{
}
void didFinishLoading() override
{
createImageBitmapAndResolvePromiseSoon(m_blobLoader.arrayBufferResult());
}
void didFail(ExceptionCode) override
{
createImageBitmapAndResolvePromiseSoon(nullptr);
}
void createImageBitmapAndResolvePromiseSoon(RefPtr<ArrayBuffer>&& arrayBuffer)
{
ASSERT(!m_createImageBitmapTimer.isActive());
m_arrayBufferToProcess = WTFMove(arrayBuffer);
m_createImageBitmapTimer.startOneShot(0_s);
}
void createImageBitmapAndResolvePromise()
{
auto destroyOnExit = makeScopeExit([this] {
delete this;
});
if (!m_arrayBufferToProcess) {
m_promise.reject(InvalidStateError, "An error occured reading the Blob argument to createImageBitmap");
return;
}
ImageBitmap::createFromBuffer(*scriptExecutionContext(), m_arrayBufferToProcess.releaseNonNull(), m_blob->type(), m_blob->size(), m_blobLoader.url(), WTFMove(m_options), WTFMove(m_rect), WTFMove(m_promise));
}
FileReaderLoader m_blobLoader;
RefPtr<Blob> m_blob;
ImageBitmapOptions m_options;
std::optional<IntRect> m_rect;
ImageBitmap::Promise m_promise;
SuspendableTimer m_createImageBitmapTimer;
RefPtr<ArrayBuffer> m_arrayBufferToProcess;
};
void ImageBitmap::createFromBuffer(ScriptExecutionContext& scriptExecutionContext, Ref<ArrayBuffer>&& arrayBuffer, String mimeType, long long expectedContentLength, const URL& sourceURL, ImageBitmapOptions&& options, std::optional<IntRect> rect, Promise&& promise)
{
if (!arrayBuffer->byteLength()) {
promise.reject(InvalidStateError, "Cannot create an ImageBitmap from an empty buffer");
return;
}
auto sharedBuffer = SharedBuffer::create(static_cast<const char*>(arrayBuffer->data()), arrayBuffer->byteLength());
auto observer = ImageBitmapImageObserver::create(mimeType, expectedContentLength, sourceURL);
auto image = BitmapImage::create(observer.ptr());
auto result = image->setData(sharedBuffer.copyRef(), true);
if (result != EncodedDataStatus::Complete || image->isNull()) {
promise.reject(InvalidStateError, "Cannot decode the data in the argument to createImageBitmap");
return;
}
auto sourceRectangle = croppedSourceRectangleWithFormatting(roundedIntSize(image->size()), options, rect);
if (sourceRectangle.hasException()) {
promise.reject(sourceRectangle.releaseException());
return;
}
auto outputSize = outputSizeForSourceRectangle(sourceRectangle.returnValue(), options);
auto bitmapData = createImageBuffer(scriptExecutionContext, outputSize, bufferRenderingMode, image->colorSpace());
if (!bitmapData) {
promise.reject(InvalidStateError, "Cannot create an image buffer from the argument to createImageBitmap");
return;
}
FloatRect destRect(FloatPoint(), outputSize);
bitmapData->context().drawImage(image, destRect, sourceRectangle.releaseReturnValue(), { interpolationQualityForResizeQuality(options.resizeQuality), options.resolvedImageOrientation(ImageOrientation::None) });
OptionSet<SerializationState> serializationState = SerializationState::OriginClean;
if (alphaPremultiplicationForPremultiplyAlpha(options.premultiplyAlpha) == AlphaPremultiplication::Premultiplied)
serializationState.add(SerializationState::PremultiplyAlpha);
auto imageBitmap = create(ImageBitmapBacking(WTFMove(bitmapData), serializationState));
promise.resolve(WTFMove(imageBitmap));
}
void ImageBitmap::createPromise(ScriptExecutionContext& scriptExecutionContext, RefPtr<Blob>& blob, ImageBitmapOptions&& options, std::optional<IntRect> rect, ImageBitmap::Promise&& promise)
{
// 2. Return a new promise, but continue running these steps in parallel.
PendingImageBitmap::fetch(scriptExecutionContext, WTFMove(blob), WTFMove(options), WTFMove(rect), WTFMove(promise));
}
void ImageBitmap::createPromise(ScriptExecutionContext& scriptExecutionContext, RefPtr<ImageData>& imageData, ImageBitmapOptions&& options, std::optional<IntRect> rect, ImageBitmap::Promise&& promise)
{
// 6.1. Let buffer be image's data attribute value's [[ViewedArrayBuffer]]
// internal slot.
// 6.2. If IsDetachedBuffer(buffer) is true, then return p rejected with an
// "InvalidStateError" DOMException.
if (imageData->data().isDetached()) {
promise.reject(InvalidStateError, "ImageData's viewed buffer has been detached");
return;
}
// 6.3. Set imageBitmap's bitmap data to image's image data, cropped to the
// source rectangle with formatting.
auto sourceRectangle = croppedSourceRectangleWithFormatting(imageData->size(), options, WTFMove(rect));
if (sourceRectangle.hasException()) {
promise.reject(sourceRectangle.releaseException());
return;
}
auto outputSize = outputSizeForSourceRectangle(sourceRectangle.returnValue(), options);
auto bitmapData = createImageBuffer(scriptExecutionContext, outputSize, bufferRenderingMode, toDestinationColorSpace(imageData->colorSpace()));
if (!bitmapData) {
resolveWithBlankImageBuffer(scriptExecutionContext, true, WTFMove(promise));
return;
}
// If no cropping, resizing, flipping, etc. are needed, then simply use the
// resulting ImageBuffer directly.
auto alphaPremultiplication = alphaPremultiplicationForPremultiplyAlpha(options.premultiplyAlpha);
if (sourceRectangle.returnValue().location().isZero() && sourceRectangle.returnValue().size() == imageData->size() && sourceRectangle.returnValue().size() == outputSize && options.orientation == ImageBitmapOptions::Orientation::None) {
bitmapData->putPixelBuffer(imageData->pixelBuffer(), sourceRectangle.releaseReturnValue(), { }, alphaPremultiplication);
auto imageBitmap = create(ImageBitmapBacking(WTFMove(bitmapData)));
// The result is implicitly origin-clean, and alpha premultiplication has already been handled.
promise.resolve(WTFMove(imageBitmap));
return;
}
// 6.3. Set imageBitmap's bitmap data to image's image data, cropped to the
// source rectangle with formatting.
auto tempBitmapData = createImageBuffer(scriptExecutionContext, imageData->size(), bufferRenderingMode, toDestinationColorSpace(imageData->colorSpace()));
if (!tempBitmapData) {
resolveWithBlankImageBuffer(scriptExecutionContext, true, WTFMove(promise));
return;
}
tempBitmapData->putPixelBuffer(imageData->pixelBuffer(), IntRect(0, 0, imageData->width(), imageData->height()), { }, alphaPremultiplication);
FloatRect destRect(FloatPoint(), outputSize);
bitmapData->context().drawImageBuffer(*tempBitmapData, destRect, sourceRectangle.releaseReturnValue(), { interpolationQualityForResizeQuality(options.resizeQuality), options.resolvedImageOrientation(ImageOrientation::None) });
// 6.4.1. Resolve p with ImageBitmap.
auto imageBitmap = create({ WTFMove(bitmapData) });
// The result is implicitly origin-clean, and alpha premultiplication has already been handled.
promise.resolve(WTFMove(imageBitmap));
}
ImageBitmap::ImageBitmap(std::optional<ImageBitmapBacking>&& backingStore)
: m_backingStore(WTFMove(backingStore))
{
ASSERT_IMPLIES(m_backingStore, m_backingStore->buffer());
updateMemoryCost();
}
ImageBitmap::~ImageBitmap()
{
if (isMainThread())
return;
if (auto imageBuffer = takeImageBuffer())
callOnMainThread([imageBuffer = WTFMove(imageBuffer)] { });
}
std::optional<ImageBitmapBacking> ImageBitmap::takeImageBitmapBacking()
{
auto result = std::exchange(m_backingStore, std::nullopt);
if (result)
updateMemoryCost();
return result;
}
RefPtr<ImageBuffer> ImageBitmap::takeImageBuffer()
{
if (auto backingStore = takeImageBitmapBacking())
return backingStore->takeImageBuffer();
ASSERT(isDetached());
return nullptr;
}
void ImageBitmap::updateMemoryCost()
{
if (m_backingStore) {
if (auto imageBuffer = m_backingStore->buffer()) {
m_memoryCost = imageBuffer->memoryCost();
return;
}
}
m_memoryCost = 0;
}
size_t ImageBitmap::memoryCost() const
{
return m_memoryCost;
}
} // namespace WebCore