mirror of
https://github.com/mozilla/gecko-dev.git
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9a23481b1c
This fixes rendering of background-image when CSS zoom is in effect. Note that we want to scale the resolution by the _inverse_ of the zoom, since having a higher image resolution means that the CSS size gets shrunk and viceversa. Differential Revision: https://phabricator.services.mozilla.com/D192130
1034 lines
40 KiB
C++
1034 lines
40 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* utility code for drawing images as CSS borders, backgrounds, and shapes. */
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#include "nsImageRenderer.h"
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#include "mozilla/webrender/WebRenderAPI.h"
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#include "gfxContext.h"
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#include "gfxDrawable.h"
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#include "ImageOps.h"
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#include "ImageRegion.h"
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#include "mozilla/image/WebRenderImageProvider.h"
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#include "mozilla/layers/RenderRootStateManager.h"
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#include "mozilla/layers/StackingContextHelper.h"
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#include "mozilla/layers/WebRenderLayerManager.h"
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#include "nsContentUtils.h"
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#include "nsCSSRendering.h"
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#include "nsCSSRenderingGradients.h"
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#include "nsDeviceContext.h"
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#include "nsIFrame.h"
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#include "nsLayoutUtils.h"
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#include "nsStyleStructInlines.h"
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#include "mozilla/StaticPrefs_image.h"
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#include "mozilla/ISVGDisplayableFrame.h"
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#include "mozilla/SVGIntegrationUtils.h"
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#include "mozilla/SVGPaintServerFrame.h"
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#include "mozilla/SVGObserverUtils.h"
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using namespace mozilla;
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using namespace mozilla::gfx;
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using namespace mozilla::image;
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using namespace mozilla::layers;
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nsSize CSSSizeOrRatio::ComputeConcreteSize() const {
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NS_ASSERTION(CanComputeConcreteSize(), "Cannot compute");
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if (mHasWidth && mHasHeight) {
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return nsSize(mWidth, mHeight);
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}
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if (mHasWidth) {
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return nsSize(mWidth, mRatio.Inverted().ApplyTo(mWidth));
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}
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MOZ_ASSERT(mHasHeight);
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return nsSize(mRatio.ApplyTo(mHeight), mHeight);
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}
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nsImageRenderer::nsImageRenderer(nsIFrame* aForFrame, const StyleImage* aImage,
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uint32_t aFlags)
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: mForFrame(aForFrame),
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mImage(&aImage->FinalImage()),
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mImageResolution(aImage->GetResolution(*aForFrame->Style())),
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mType(mImage->tag),
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mImageContainer(nullptr),
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mGradientData(nullptr),
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mPaintServerFrame(nullptr),
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mPrepareResult(ImgDrawResult::NOT_READY),
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mSize(0, 0),
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mFlags(aFlags),
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mExtendMode(ExtendMode::CLAMP),
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mMaskOp(StyleMaskMode::MatchSource) {}
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bool nsImageRenderer::PrepareImage() {
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if (mImage->IsNone()) {
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mPrepareResult = ImgDrawResult::BAD_IMAGE;
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return false;
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}
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const bool isImageRequest = mImage->IsImageRequestType();
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MOZ_ASSERT_IF(!isImageRequest, !mImage->GetImageRequest());
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imgRequestProxy* request = nullptr;
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if (isImageRequest) {
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request = mImage->GetImageRequest();
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if (!request) {
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// request could be null here if the StyleImage refused
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// to load a same-document URL, or the url was invalid, for example.
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mPrepareResult = ImgDrawResult::BAD_IMAGE;
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return false;
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}
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}
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if (!mImage->IsComplete()) {
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MOZ_DIAGNOSTIC_ASSERT(isImageRequest);
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// Make sure the image is actually decoding.
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bool frameComplete = request->StartDecodingWithResult(
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imgIContainer::FLAG_ASYNC_NOTIFY |
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imgIContainer::FLAG_AVOID_REDECODE_FOR_SIZE);
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// Boost the loading priority since we know we want to draw the image.
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if (mFlags & nsImageRenderer::FLAG_PAINTING_TO_WINDOW) {
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request->BoostPriority(imgIRequest::CATEGORY_DISPLAY);
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}
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// Check again to see if we finished.
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// We cannot prepare the image for rendering if it is not fully loaded.
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if (!frameComplete && !mImage->IsComplete()) {
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uint32_t imageStatus = 0;
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request->GetImageStatus(&imageStatus);
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if (imageStatus & imgIRequest::STATUS_ERROR) {
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mPrepareResult = ImgDrawResult::BAD_IMAGE;
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return false;
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}
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// If not errored, and we requested a sync decode, and the image has
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// loaded, push on through because the Draw() will do a sync decode then.
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const bool syncDecodeWillComplete =
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(mFlags & FLAG_SYNC_DECODE_IMAGES) &&
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(imageStatus & imgIRequest::STATUS_LOAD_COMPLETE);
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bool canDrawPartial =
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(mFlags & nsImageRenderer::FLAG_DRAW_PARTIAL_FRAMES) &&
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isImageRequest && mImage->IsSizeAvailable();
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// If we are drawing a partial frame then we want to make sure there are
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// some pixels to draw, otherwise we waste effort pushing through to draw
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// nothing.
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if (!syncDecodeWillComplete && canDrawPartial) {
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nsCOMPtr<imgIContainer> image;
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canDrawPartial =
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canDrawPartial &&
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NS_SUCCEEDED(request->GetImage(getter_AddRefs(image))) && image &&
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image->GetType() == imgIContainer::TYPE_RASTER &&
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image->HasDecodedPixels();
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}
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// If we can draw partial then proceed if we at least have the size
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// available.
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if (!(syncDecodeWillComplete || canDrawPartial)) {
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mPrepareResult = ImgDrawResult::NOT_READY;
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return false;
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}
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}
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}
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if (isImageRequest) {
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nsCOMPtr<imgIContainer> srcImage;
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nsresult rv = request->GetImage(getter_AddRefs(srcImage));
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MOZ_ASSERT(NS_SUCCEEDED(rv) && srcImage,
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"If GetImage() is failing, mImage->IsComplete() "
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"should have returned false");
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if (!NS_SUCCEEDED(rv)) {
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srcImage = nullptr;
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}
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if (srcImage) {
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StyleImageOrientation orientation =
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mForFrame->StyleVisibility()->UsedImageOrientation(request);
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srcImage = nsLayoutUtils::OrientImage(srcImage, orientation);
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}
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mImageContainer.swap(srcImage);
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mPrepareResult = ImgDrawResult::SUCCESS;
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} else if (mImage->IsGradient()) {
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mGradientData = &*mImage->AsGradient();
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mPrepareResult = ImgDrawResult::SUCCESS;
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} else if (mImage->IsElement()) {
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dom::Element* paintElement = // may be null
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SVGObserverUtils::GetAndObserveBackgroundImage(
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mForFrame->FirstContinuation(), mImage->AsElement().AsAtom());
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// If the referenced element is an <img>, <canvas>, or <video> element,
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// prefer SurfaceFromElement as it's more reliable.
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mImageElementSurface = nsLayoutUtils::SurfaceFromElement(paintElement);
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if (!mImageElementSurface.GetSourceSurface()) {
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nsIFrame* paintServerFrame =
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paintElement ? paintElement->GetPrimaryFrame() : nullptr;
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// If there's no referenced frame, or the referenced frame is
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// non-displayable SVG, then we have nothing valid to paint.
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if (!paintServerFrame ||
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(paintServerFrame->IsFrameOfType(nsIFrame::eSVG) &&
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!static_cast<SVGPaintServerFrame*>(
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do_QueryFrame(paintServerFrame)) &&
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!static_cast<ISVGDisplayableFrame*>(
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do_QueryFrame(paintServerFrame)))) {
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mPrepareResult = ImgDrawResult::BAD_IMAGE;
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return false;
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}
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mPaintServerFrame = paintServerFrame;
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}
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mPrepareResult = ImgDrawResult::SUCCESS;
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} else if (mImage->IsCrossFade()) {
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// See bug 546052 - cross-fade implementation still being worked
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// on.
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mPrepareResult = ImgDrawResult::BAD_IMAGE;
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return false;
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} else {
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MOZ_ASSERT(mImage->IsNone(), "Unknown image type?");
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}
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return IsReady();
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}
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CSSSizeOrRatio nsImageRenderer::ComputeIntrinsicSize() {
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NS_ASSERTION(IsReady(),
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"Ensure PrepareImage() has returned true "
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"before calling me");
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CSSSizeOrRatio result;
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switch (mType) {
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case StyleImage::Tag::Url: {
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bool haveWidth, haveHeight;
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CSSIntSize imageIntSize;
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nsLayoutUtils::ComputeSizeForDrawing(mImageContainer, mImageResolution,
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imageIntSize, result.mRatio,
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haveWidth, haveHeight);
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if (haveWidth) {
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result.SetWidth(CSSPixel::ToAppUnits(imageIntSize.width));
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}
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if (haveHeight) {
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result.SetHeight(CSSPixel::ToAppUnits(imageIntSize.height));
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}
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// If we know the aspect ratio and one of the dimensions,
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// we can compute the other missing width or height.
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if (!haveHeight && haveWidth && result.mRatio) {
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CSSIntCoord intrinsicHeight =
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result.mRatio.Inverted().ApplyTo(imageIntSize.width);
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result.SetHeight(nsPresContext::CSSPixelsToAppUnits(intrinsicHeight));
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} else if (haveHeight && !haveWidth && result.mRatio) {
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CSSIntCoord intrinsicWidth = result.mRatio.ApplyTo(imageIntSize.height);
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result.SetWidth(nsPresContext::CSSPixelsToAppUnits(intrinsicWidth));
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}
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break;
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}
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case StyleImage::Tag::Element: {
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// XXX element() should have the width/height of the referenced element,
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// and that element's ratio, if it matches. If it doesn't match, it
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// should have no width/height or ratio. See element() in CSS images:
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// <http://dev.w3.org/csswg/css-images-4/#element-notation>.
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// Make sure to change nsStyleImageLayers::Size::DependsOnFrameSize
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// when fixing this!
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if (mPaintServerFrame) {
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// SVG images have no intrinsic size
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if (!mPaintServerFrame->IsFrameOfType(nsIFrame::eSVG)) {
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// The intrinsic image size for a generic nsIFrame paint server is
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// the union of the border-box rects of all of its continuations,
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// rounded to device pixels.
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int32_t appUnitsPerDevPixel =
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mForFrame->PresContext()->AppUnitsPerDevPixel();
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result.SetSize(IntSizeToAppUnits(
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SVGIntegrationUtils::GetContinuationUnionSize(mPaintServerFrame)
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.ToNearestPixels(appUnitsPerDevPixel),
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appUnitsPerDevPixel));
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}
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} else {
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NS_ASSERTION(mImageElementSurface.GetSourceSurface(),
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"Surface should be ready.");
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IntSize surfaceSize = mImageElementSurface.mSize;
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result.SetSize(
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nsSize(nsPresContext::CSSPixelsToAppUnits(surfaceSize.width),
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nsPresContext::CSSPixelsToAppUnits(surfaceSize.height)));
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}
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break;
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}
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case StyleImage::Tag::ImageSet:
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MOZ_FALLTHROUGH_ASSERT("image-set should be resolved already");
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// Bug 546052 cross-fade not yet implemented.
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case StyleImage::Tag::CrossFade:
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// Per <http://dev.w3.org/csswg/css3-images/#gradients>, gradients have no
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// intrinsic dimensions.
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case StyleImage::Tag::Gradient:
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case StyleImage::Tag::None:
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break;
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}
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return result;
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}
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/* static */
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nsSize nsImageRenderer::ComputeConcreteSize(
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const CSSSizeOrRatio& aSpecifiedSize, const CSSSizeOrRatio& aIntrinsicSize,
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const nsSize& aDefaultSize) {
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// The specified size is fully specified, just use that
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if (aSpecifiedSize.IsConcrete()) {
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return aSpecifiedSize.ComputeConcreteSize();
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}
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MOZ_ASSERT(!aSpecifiedSize.mHasWidth || !aSpecifiedSize.mHasHeight);
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if (!aSpecifiedSize.mHasWidth && !aSpecifiedSize.mHasHeight) {
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// no specified size, try using the intrinsic size
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if (aIntrinsicSize.CanComputeConcreteSize()) {
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return aIntrinsicSize.ComputeConcreteSize();
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}
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if (aIntrinsicSize.mHasWidth) {
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return nsSize(aIntrinsicSize.mWidth, aDefaultSize.height);
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}
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if (aIntrinsicSize.mHasHeight) {
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return nsSize(aDefaultSize.width, aIntrinsicSize.mHeight);
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}
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// couldn't use the intrinsic size either, revert to using the default size
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return ComputeConstrainedSize(aDefaultSize, aIntrinsicSize.mRatio, CONTAIN);
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}
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MOZ_ASSERT(aSpecifiedSize.mHasWidth || aSpecifiedSize.mHasHeight);
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// The specified height is partial, try to compute the missing part.
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if (aSpecifiedSize.mHasWidth) {
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nscoord height;
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if (aIntrinsicSize.HasRatio()) {
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height = aIntrinsicSize.mRatio.Inverted().ApplyTo(aSpecifiedSize.mWidth);
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} else if (aIntrinsicSize.mHasHeight) {
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height = aIntrinsicSize.mHeight;
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} else {
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height = aDefaultSize.height;
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}
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return nsSize(aSpecifiedSize.mWidth, height);
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}
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MOZ_ASSERT(aSpecifiedSize.mHasHeight);
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nscoord width;
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if (aIntrinsicSize.HasRatio()) {
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width = aIntrinsicSize.mRatio.ApplyTo(aSpecifiedSize.mHeight);
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} else if (aIntrinsicSize.mHasWidth) {
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width = aIntrinsicSize.mWidth;
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} else {
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width = aDefaultSize.width;
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}
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return nsSize(width, aSpecifiedSize.mHeight);
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}
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/* static */
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nsSize nsImageRenderer::ComputeConstrainedSize(
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const nsSize& aConstrainingSize, const AspectRatio& aIntrinsicRatio,
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FitType aFitType) {
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if (!aIntrinsicRatio) {
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return aConstrainingSize;
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}
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// Suppose we're doing a "contain" fit. If the image's aspect ratio has a
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// "fatter" shape than the constraint area, then we need to use the
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// constraint area's full width, and we need to use the aspect ratio to
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// produce a height. On the other hand, if the aspect ratio is "skinnier", we
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// use the constraint area's full height, and we use the aspect ratio to
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// produce a width. (If instead we're doing a "cover" fit, then it can easily
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// be seen that we should do precisely the opposite.)
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//
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// We check if the image's aspect ratio is "fatter" than the constraint area
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// by simply applying the aspect ratio to the constraint area's height, to
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// produce a "hypothetical width", and we check whether that
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// aspect-ratio-provided "hypothetical width" is wider than the constraint
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// area's actual width. If it is, then the aspect ratio is fatter than the
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// constraint area.
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//
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// This is equivalent to the more descriptive alternative:
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//
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// AspectRatio::FromSize(aConstrainingSize) < aIntrinsicRatio
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//
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// But gracefully handling the case where one of the two dimensions from
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// aConstrainingSize is zero. This is easy to prove since:
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//
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// aConstrainingSize.width / aConstrainingSize.height < aIntrinsicRatio
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//
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// Is trivially equivalent to:
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//
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// aIntrinsicRatio.width < aIntrinsicRatio * aConstrainingSize.height
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//
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// For the cases where height is not zero.
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//
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// We use float math here to avoid losing precision for very large backgrounds
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// since we use saturating nscoord math otherwise.
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const float constraintWidth = float(aConstrainingSize.width);
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const float hypotheticalWidth =
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aIntrinsicRatio.ApplyToFloat(aConstrainingSize.height);
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nsSize size;
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if ((aFitType == CONTAIN) == (constraintWidth < hypotheticalWidth)) {
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size.width = aConstrainingSize.width;
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size.height = aIntrinsicRatio.Inverted().ApplyTo(aConstrainingSize.width);
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// If we're reducing the size by less than one css pixel, then just use the
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// constraining size.
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if (aFitType == CONTAIN &&
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aConstrainingSize.height - size.height < AppUnitsPerCSSPixel()) {
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size.height = aConstrainingSize.height;
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}
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} else {
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size.height = aConstrainingSize.height;
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size.width = aIntrinsicRatio.ApplyTo(aConstrainingSize.height);
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if (aFitType == CONTAIN &&
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aConstrainingSize.width - size.width < AppUnitsPerCSSPixel()) {
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size.width = aConstrainingSize.width;
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}
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}
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return size;
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}
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/**
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* mSize is the image's "preferred" size for this particular rendering, while
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* the drawn (aka concrete) size is the actual rendered size after accounting
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* for background-size etc.. The preferred size is most often the image's
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* intrinsic dimensions. But for images with incomplete intrinsic dimensions,
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* the preferred size varies, depending on the specified and default sizes, see
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* nsImageRenderer::Compute*Size.
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*
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* This distinction is necessary because the components of a vector image are
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* specified with respect to its preferred size for a rendering situation, not
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* to its actual rendered size. For example, consider a 4px wide background
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* vector image with no height which contains a left-aligned
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* 2px wide black rectangle with height 100%. If the background-size width is
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* auto (or 4px), the vector image will render 4px wide, and the black rectangle
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* will be 2px wide. If the background-size width is 8px, the vector image will
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* render 8px wide, and the black rectangle will be 4px wide -- *not* 2px wide.
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* In both cases mSize.width will be 4px; but in the first case the returned
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* width will be 4px, while in the second case the returned width will be 8px.
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*/
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void nsImageRenderer::SetPreferredSize(const CSSSizeOrRatio& aIntrinsicSize,
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const nsSize& aDefaultSize) {
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mSize.width =
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aIntrinsicSize.mHasWidth ? aIntrinsicSize.mWidth : aDefaultSize.width;
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mSize.height =
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aIntrinsicSize.mHasHeight ? aIntrinsicSize.mHeight : aDefaultSize.height;
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}
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// Convert from nsImageRenderer flags to the flags we want to use for drawing in
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// the imgIContainer namespace.
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static uint32_t ConvertImageRendererToDrawFlags(uint32_t aImageRendererFlags) {
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uint32_t drawFlags = imgIContainer::FLAG_ASYNC_NOTIFY;
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if (aImageRendererFlags & nsImageRenderer::FLAG_SYNC_DECODE_IMAGES) {
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drawFlags |= imgIContainer::FLAG_SYNC_DECODE;
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} else {
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drawFlags |= imgIContainer::FLAG_SYNC_DECODE_IF_FAST;
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}
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if (aImageRendererFlags & (nsImageRenderer::FLAG_PAINTING_TO_WINDOW |
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nsImageRenderer::FLAG_HIGH_QUALITY_SCALING)) {
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drawFlags |= imgIContainer::FLAG_HIGH_QUALITY_SCALING;
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}
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return drawFlags;
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}
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ImgDrawResult nsImageRenderer::Draw(nsPresContext* aPresContext,
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gfxContext& aRenderingContext,
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const nsRect& aDirtyRect,
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const nsRect& aDest, const nsRect& aFill,
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const nsPoint& aAnchor,
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const nsSize& aRepeatSize,
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const CSSIntRect& aSrc, float aOpacity) {
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if (!IsReady()) {
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MOZ_ASSERT_UNREACHABLE(
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|
"Ensure PrepareImage() has returned true before "
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"calling me");
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return ImgDrawResult::TEMPORARY_ERROR;
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}
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if (aDest.IsEmpty() || aFill.IsEmpty() || mSize.width <= 0 ||
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mSize.height <= 0) {
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return ImgDrawResult::SUCCESS;
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}
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|
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SamplingFilter samplingFilter =
|
|
nsLayoutUtils::GetSamplingFilterForFrame(mForFrame);
|
|
ImgDrawResult result = ImgDrawResult::SUCCESS;
|
|
gfxContext* ctx = &aRenderingContext;
|
|
Maybe<gfxContext> tempCtx;
|
|
IntRect tmpDTRect;
|
|
|
|
if (ctx->CurrentOp() != CompositionOp::OP_OVER ||
|
|
mMaskOp == StyleMaskMode::Luminance) {
|
|
gfxRect clipRect = ctx->GetClipExtents(gfxContext::eDeviceSpace);
|
|
tmpDTRect = RoundedOut(ToRect(clipRect));
|
|
if (tmpDTRect.IsEmpty()) {
|
|
return ImgDrawResult::SUCCESS;
|
|
}
|
|
RefPtr<DrawTarget> tempDT = ctx->GetDrawTarget()->CreateSimilarDrawTarget(
|
|
tmpDTRect.Size(), SurfaceFormat::B8G8R8A8);
|
|
if (!tempDT || !tempDT->IsValid()) {
|
|
gfxDevCrash(LogReason::InvalidContext)
|
|
<< "ImageRenderer::Draw problem " << gfx::hexa(tempDT);
|
|
return ImgDrawResult::TEMPORARY_ERROR;
|
|
}
|
|
tempDT->SetTransform(ctx->GetDrawTarget()->GetTransform() *
|
|
Matrix::Translation(-tmpDTRect.TopLeft()));
|
|
tempCtx.emplace(tempDT, /* aPreserveTransform */ true);
|
|
ctx = &tempCtx.ref();
|
|
if (!ctx) {
|
|
gfxDevCrash(LogReason::InvalidContext)
|
|
<< "ImageRenderer::Draw problem " << gfx::hexa(tempDT);
|
|
return ImgDrawResult::TEMPORARY_ERROR;
|
|
}
|
|
}
|
|
|
|
switch (mType) {
|
|
case StyleImage::Tag::Url: {
|
|
result = nsLayoutUtils::DrawBackgroundImage(
|
|
*ctx, mForFrame, aPresContext, mImageContainer, samplingFilter, aDest,
|
|
aFill, aRepeatSize, aAnchor, aDirtyRect,
|
|
ConvertImageRendererToDrawFlags(mFlags), mExtendMode, aOpacity);
|
|
break;
|
|
}
|
|
case StyleImage::Tag::Gradient: {
|
|
nsCSSGradientRenderer renderer = nsCSSGradientRenderer::Create(
|
|
aPresContext, mForFrame->Style(), *mGradientData, mSize);
|
|
|
|
renderer.Paint(*ctx, aDest, aFill, aRepeatSize, aSrc, aDirtyRect,
|
|
aOpacity);
|
|
break;
|
|
}
|
|
case StyleImage::Tag::Element: {
|
|
RefPtr<gfxDrawable> drawable = DrawableForElement(aDest, *ctx);
|
|
if (!drawable) {
|
|
NS_WARNING("Could not create drawable for element");
|
|
return ImgDrawResult::TEMPORARY_ERROR;
|
|
}
|
|
|
|
nsCOMPtr<imgIContainer> image(ImageOps::CreateFromDrawable(drawable));
|
|
result = nsLayoutUtils::DrawImage(
|
|
*ctx, mForFrame->Style(), aPresContext, image, samplingFilter, aDest,
|
|
aFill, aAnchor, aDirtyRect, ConvertImageRendererToDrawFlags(mFlags),
|
|
aOpacity);
|
|
break;
|
|
}
|
|
case StyleImage::Tag::ImageSet:
|
|
MOZ_FALLTHROUGH_ASSERT("image-set should be resolved already");
|
|
// See bug 546052 - cross-fade implementation still being worked
|
|
// on.
|
|
case StyleImage::Tag::CrossFade:
|
|
case StyleImage::Tag::None:
|
|
break;
|
|
}
|
|
|
|
if (!tmpDTRect.IsEmpty()) {
|
|
DrawTarget* dt = aRenderingContext.GetDrawTarget();
|
|
Matrix oldTransform = dt->GetTransform();
|
|
dt->SetTransform(Matrix());
|
|
if (mMaskOp == StyleMaskMode::Luminance) {
|
|
RefPtr<SourceSurface> surf = ctx->GetDrawTarget()->IntoLuminanceSource(
|
|
LuminanceType::LUMINANCE, 1.0f);
|
|
dt->MaskSurface(ColorPattern(DeviceColor(0, 0, 0, 1.0f)), surf,
|
|
tmpDTRect.TopLeft(),
|
|
DrawOptions(1.0f, aRenderingContext.CurrentOp()));
|
|
} else {
|
|
RefPtr<SourceSurface> surf = ctx->GetDrawTarget()->Snapshot();
|
|
dt->DrawSurface(
|
|
surf,
|
|
Rect(tmpDTRect.x, tmpDTRect.y, tmpDTRect.width, tmpDTRect.height),
|
|
Rect(0, 0, tmpDTRect.width, tmpDTRect.height),
|
|
DrawSurfaceOptions(SamplingFilter::POINT),
|
|
DrawOptions(1.0f, aRenderingContext.CurrentOp()));
|
|
}
|
|
|
|
dt->SetTransform(oldTransform);
|
|
}
|
|
|
|
if (!mImage->IsComplete()) {
|
|
result &= ImgDrawResult::SUCCESS_NOT_COMPLETE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
ImgDrawResult nsImageRenderer::BuildWebRenderDisplayItems(
|
|
nsPresContext* aPresContext, mozilla::wr::DisplayListBuilder& aBuilder,
|
|
mozilla::wr::IpcResourceUpdateQueue& aResources,
|
|
const mozilla::layers::StackingContextHelper& aSc,
|
|
mozilla::layers::RenderRootStateManager* aManager, nsDisplayItem* aItem,
|
|
const nsRect& aDirtyRect, const nsRect& aDest, const nsRect& aFill,
|
|
const nsPoint& aAnchor, const nsSize& aRepeatSize, const CSSIntRect& aSrc,
|
|
float aOpacity) {
|
|
if (!IsReady()) {
|
|
MOZ_ASSERT_UNREACHABLE(
|
|
"Ensure PrepareImage() has returned true before "
|
|
"calling me");
|
|
return ImgDrawResult::NOT_READY;
|
|
}
|
|
|
|
if (aDest.IsEmpty() || aFill.IsEmpty() || mSize.width <= 0 ||
|
|
mSize.height <= 0) {
|
|
return ImgDrawResult::SUCCESS;
|
|
}
|
|
|
|
ImgDrawResult drawResult = ImgDrawResult::SUCCESS;
|
|
switch (mType) {
|
|
case StyleImage::Tag::Gradient: {
|
|
nsCSSGradientRenderer renderer = nsCSSGradientRenderer::Create(
|
|
aPresContext, mForFrame->Style(), *mGradientData, mSize);
|
|
|
|
renderer.BuildWebRenderDisplayItems(aBuilder, aSc, aDest, aFill,
|
|
aRepeatSize, aSrc,
|
|
!aItem->BackfaceIsHidden(), aOpacity);
|
|
break;
|
|
}
|
|
case StyleImage::Tag::Url: {
|
|
ExtendMode extendMode = mExtendMode;
|
|
if (aDest.Contains(aFill)) {
|
|
extendMode = ExtendMode::CLAMP;
|
|
}
|
|
|
|
uint32_t containerFlags = ConvertImageRendererToDrawFlags(mFlags);
|
|
if (extendMode == ExtendMode::CLAMP &&
|
|
StaticPrefs::image_svg_blob_image() &&
|
|
mImageContainer->GetType() == imgIContainer::TYPE_VECTOR) {
|
|
containerFlags |= imgIContainer::FLAG_RECORD_BLOB;
|
|
}
|
|
|
|
CSSIntSize destCSSSize{
|
|
nsPresContext::AppUnitsToIntCSSPixels(aDest.width),
|
|
nsPresContext::AppUnitsToIntCSSPixels(aDest.height)};
|
|
|
|
SVGImageContext svgContext(Some(destCSSSize));
|
|
Maybe<ImageIntRegion> region;
|
|
|
|
const int32_t appUnitsPerDevPixel =
|
|
mForFrame->PresContext()->AppUnitsPerDevPixel();
|
|
LayoutDeviceRect destRect =
|
|
LayoutDeviceRect::FromAppUnits(aDest, appUnitsPerDevPixel);
|
|
LayoutDeviceRect clipRect =
|
|
LayoutDeviceRect::FromAppUnits(aFill, appUnitsPerDevPixel);
|
|
auto stretchSize = wr::ToLayoutSize(destRect.Size());
|
|
|
|
gfx::IntSize decodeSize =
|
|
nsLayoutUtils::ComputeImageContainerDrawingParameters(
|
|
mImageContainer, mForFrame, destRect, clipRect, aSc,
|
|
containerFlags, svgContext, region);
|
|
|
|
RefPtr<image::WebRenderImageProvider> provider;
|
|
drawResult = mImageContainer->GetImageProvider(
|
|
aManager->LayerManager(), decodeSize, svgContext, region,
|
|
containerFlags, getter_AddRefs(provider));
|
|
|
|
Maybe<wr::ImageKey> key =
|
|
aManager->CommandBuilder().CreateImageProviderKey(
|
|
aItem, provider, drawResult, aResources);
|
|
if (key.isNothing()) {
|
|
break;
|
|
}
|
|
|
|
auto rendering =
|
|
wr::ToImageRendering(aItem->Frame()->UsedImageRendering());
|
|
wr::LayoutRect clip = wr::ToLayoutRect(clipRect);
|
|
|
|
// If we provided a region to the provider, then it already took the
|
|
// dest rect into account when it did the recording.
|
|
wr::LayoutRect dest = region ? clip : wr::ToLayoutRect(destRect);
|
|
|
|
if (extendMode == ExtendMode::CLAMP) {
|
|
// The image is not repeating. Just push as a regular image.
|
|
aBuilder.PushImage(dest, clip, !aItem->BackfaceIsHidden(), false,
|
|
rendering, key.value(), true,
|
|
wr::ColorF{1.0f, 1.0f, 1.0f, aOpacity});
|
|
} else {
|
|
nsPoint firstTilePos = nsLayoutUtils::GetBackgroundFirstTilePos(
|
|
aDest.TopLeft(), aFill.TopLeft(), aRepeatSize);
|
|
LayoutDeviceRect fillRect = LayoutDeviceRect::FromAppUnits(
|
|
nsRect(firstTilePos.x, firstTilePos.y,
|
|
aFill.XMost() - firstTilePos.x,
|
|
aFill.YMost() - firstTilePos.y),
|
|
appUnitsPerDevPixel);
|
|
wr::LayoutRect fill = wr::ToLayoutRect(fillRect);
|
|
|
|
switch (extendMode) {
|
|
case ExtendMode::REPEAT_Y:
|
|
fill.min.x = dest.min.x;
|
|
fill.max.x = dest.max.x;
|
|
stretchSize.width = dest.width();
|
|
break;
|
|
case ExtendMode::REPEAT_X:
|
|
fill.min.y = dest.min.y;
|
|
fill.max.y = dest.max.y;
|
|
stretchSize.height = dest.height();
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
LayoutDeviceSize gapSize = LayoutDeviceSize::FromAppUnits(
|
|
aRepeatSize - aDest.Size(), appUnitsPerDevPixel);
|
|
|
|
aBuilder.PushRepeatingImage(fill, clip, !aItem->BackfaceIsHidden(),
|
|
stretchSize, wr::ToLayoutSize(gapSize),
|
|
rendering, key.value(), true,
|
|
wr::ColorF{1.0f, 1.0f, 1.0f, aOpacity});
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!mImage->IsComplete() && drawResult == ImgDrawResult::SUCCESS) {
|
|
return ImgDrawResult::SUCCESS_NOT_COMPLETE;
|
|
}
|
|
return drawResult;
|
|
}
|
|
|
|
already_AddRefed<gfxDrawable> nsImageRenderer::DrawableForElement(
|
|
const nsRect& aImageRect, gfxContext& aContext) {
|
|
NS_ASSERTION(mType == StyleImage::Tag::Element,
|
|
"DrawableForElement only makes sense if backed by an element");
|
|
if (mPaintServerFrame) {
|
|
// XXX(seth): In order to not pass FLAG_SYNC_DECODE_IMAGES here,
|
|
// DrawableFromPaintServer would have to return a ImgDrawResult indicating
|
|
// whether any images could not be painted because they weren't fully
|
|
// decoded. Even always passing FLAG_SYNC_DECODE_IMAGES won't eliminate all
|
|
// problems, as it won't help if there are image which haven't finished
|
|
// loading, but it's better than nothing.
|
|
int32_t appUnitsPerDevPixel =
|
|
mForFrame->PresContext()->AppUnitsPerDevPixel();
|
|
nsRect destRect = aImageRect - aImageRect.TopLeft();
|
|
nsIntSize roundedOut = destRect.ToOutsidePixels(appUnitsPerDevPixel).Size();
|
|
IntSize imageSize(roundedOut.width, roundedOut.height);
|
|
|
|
RefPtr<gfxDrawable> drawable;
|
|
|
|
SurfaceFormat format = aContext.GetDrawTarget()->GetFormat();
|
|
// Don't allow creating images that are too big
|
|
if (aContext.GetDrawTarget()->CanCreateSimilarDrawTarget(imageSize,
|
|
format)) {
|
|
drawable = SVGIntegrationUtils::DrawableFromPaintServer(
|
|
mPaintServerFrame, mForFrame, mSize, imageSize,
|
|
aContext.GetDrawTarget(), aContext.CurrentMatrixDouble(),
|
|
SVGIntegrationUtils::FLAG_SYNC_DECODE_IMAGES);
|
|
}
|
|
|
|
return drawable.forget();
|
|
}
|
|
NS_ASSERTION(mImageElementSurface.GetSourceSurface(),
|
|
"Surface should be ready.");
|
|
RefPtr<gfxDrawable> drawable =
|
|
new gfxSurfaceDrawable(mImageElementSurface.GetSourceSurface().get(),
|
|
mImageElementSurface.mSize);
|
|
return drawable.forget();
|
|
}
|
|
|
|
ImgDrawResult nsImageRenderer::DrawLayer(
|
|
nsPresContext* aPresContext, gfxContext& aRenderingContext,
|
|
const nsRect& aDest, const nsRect& aFill, const nsPoint& aAnchor,
|
|
const nsRect& aDirty, const nsSize& aRepeatSize, float aOpacity) {
|
|
if (!IsReady()) {
|
|
MOZ_ASSERT_UNREACHABLE(
|
|
"Ensure PrepareImage() has returned true before "
|
|
"calling me");
|
|
return ImgDrawResult::TEMPORARY_ERROR;
|
|
}
|
|
|
|
if (aDest.IsEmpty() || aFill.IsEmpty() || mSize.width <= 0 ||
|
|
mSize.height <= 0) {
|
|
return ImgDrawResult::SUCCESS;
|
|
}
|
|
|
|
return Draw(
|
|
aPresContext, aRenderingContext, aDirty, aDest, aFill, aAnchor,
|
|
aRepeatSize,
|
|
CSSIntRect(0, 0, nsPresContext::AppUnitsToIntCSSPixels(mSize.width),
|
|
nsPresContext::AppUnitsToIntCSSPixels(mSize.height)),
|
|
aOpacity);
|
|
}
|
|
|
|
ImgDrawResult nsImageRenderer::BuildWebRenderDisplayItemsForLayer(
|
|
nsPresContext* aPresContext, mozilla::wr::DisplayListBuilder& aBuilder,
|
|
mozilla::wr::IpcResourceUpdateQueue& aResources,
|
|
const mozilla::layers::StackingContextHelper& aSc,
|
|
mozilla::layers::RenderRootStateManager* aManager, nsDisplayItem* aItem,
|
|
const nsRect& aDest, const nsRect& aFill, const nsPoint& aAnchor,
|
|
const nsRect& aDirty, const nsSize& aRepeatSize, float aOpacity) {
|
|
if (!IsReady()) {
|
|
MOZ_ASSERT_UNREACHABLE(
|
|
"Ensure PrepareImage() has returned true before "
|
|
"calling me");
|
|
return mPrepareResult;
|
|
}
|
|
|
|
CSSIntRect srcRect(0, 0, nsPresContext::AppUnitsToIntCSSPixels(mSize.width),
|
|
nsPresContext::AppUnitsToIntCSSPixels(mSize.height));
|
|
|
|
if (aDest.IsEmpty() || aFill.IsEmpty() || srcRect.IsEmpty()) {
|
|
return ImgDrawResult::SUCCESS;
|
|
}
|
|
return BuildWebRenderDisplayItems(aPresContext, aBuilder, aResources, aSc,
|
|
aManager, aItem, aDirty, aDest, aFill,
|
|
aAnchor, aRepeatSize, srcRect, aOpacity);
|
|
}
|
|
|
|
/**
|
|
* Compute the size and position of the master copy of the image. I.e., a single
|
|
* tile used to fill the dest rect.
|
|
* aFill The destination rect to be filled
|
|
* aHFill and aVFill are the repeat patterns for the component -
|
|
* StyleBorderImageRepeat - i.e., how a tiling unit is used to fill aFill
|
|
* aUnitSize The size of the source rect in dest coords.
|
|
*/
|
|
static nsRect ComputeTile(nsRect& aFill, StyleBorderImageRepeat aHFill,
|
|
StyleBorderImageRepeat aVFill,
|
|
const nsSize& aUnitSize, nsSize& aRepeatSize) {
|
|
nsRect tile;
|
|
switch (aHFill) {
|
|
case StyleBorderImageRepeat::Stretch:
|
|
tile.x = aFill.x;
|
|
tile.width = aFill.width;
|
|
aRepeatSize.width = tile.width;
|
|
break;
|
|
case StyleBorderImageRepeat::Repeat:
|
|
tile.x = aFill.x + aFill.width / 2 - aUnitSize.width / 2;
|
|
tile.width = aUnitSize.width;
|
|
aRepeatSize.width = tile.width;
|
|
break;
|
|
case StyleBorderImageRepeat::Round:
|
|
tile.x = aFill.x;
|
|
tile.width =
|
|
nsCSSRendering::ComputeRoundedSize(aUnitSize.width, aFill.width);
|
|
aRepeatSize.width = tile.width;
|
|
break;
|
|
case StyleBorderImageRepeat::Space: {
|
|
nscoord space;
|
|
aRepeatSize.width = nsCSSRendering::ComputeBorderSpacedRepeatSize(
|
|
aUnitSize.width, aFill.width, space);
|
|
tile.x = aFill.x + space;
|
|
tile.width = aUnitSize.width;
|
|
aFill.x = tile.x;
|
|
aFill.width = aFill.width - space * 2;
|
|
} break;
|
|
default:
|
|
MOZ_ASSERT_UNREACHABLE("unrecognized border-image fill style");
|
|
}
|
|
|
|
switch (aVFill) {
|
|
case StyleBorderImageRepeat::Stretch:
|
|
tile.y = aFill.y;
|
|
tile.height = aFill.height;
|
|
aRepeatSize.height = tile.height;
|
|
break;
|
|
case StyleBorderImageRepeat::Repeat:
|
|
tile.y = aFill.y + aFill.height / 2 - aUnitSize.height / 2;
|
|
tile.height = aUnitSize.height;
|
|
aRepeatSize.height = tile.height;
|
|
break;
|
|
case StyleBorderImageRepeat::Round:
|
|
tile.y = aFill.y;
|
|
tile.height =
|
|
nsCSSRendering::ComputeRoundedSize(aUnitSize.height, aFill.height);
|
|
aRepeatSize.height = tile.height;
|
|
break;
|
|
case StyleBorderImageRepeat::Space: {
|
|
nscoord space;
|
|
aRepeatSize.height = nsCSSRendering::ComputeBorderSpacedRepeatSize(
|
|
aUnitSize.height, aFill.height, space);
|
|
tile.y = aFill.y + space;
|
|
tile.height = aUnitSize.height;
|
|
aFill.y = tile.y;
|
|
aFill.height = aFill.height - space * 2;
|
|
} break;
|
|
default:
|
|
MOZ_ASSERT_UNREACHABLE("unrecognized border-image fill style");
|
|
}
|
|
|
|
return tile;
|
|
}
|
|
|
|
/**
|
|
* Returns true if the given set of arguments will require the tiles which fill
|
|
* the dest rect to be scaled from the source tile. See comment on ComputeTile
|
|
* for argument descriptions.
|
|
*/
|
|
static bool RequiresScaling(const nsRect& aFill, StyleBorderImageRepeat aHFill,
|
|
StyleBorderImageRepeat aVFill,
|
|
const nsSize& aUnitSize) {
|
|
// If we have no tiling in either direction, we can skip the intermediate
|
|
// scaling step.
|
|
return (aHFill != StyleBorderImageRepeat::Stretch ||
|
|
aVFill != StyleBorderImageRepeat::Stretch) &&
|
|
(aUnitSize.width != aFill.width || aUnitSize.height != aFill.height);
|
|
}
|
|
|
|
ImgDrawResult nsImageRenderer::DrawBorderImageComponent(
|
|
nsPresContext* aPresContext, gfxContext& aRenderingContext,
|
|
const nsRect& aDirtyRect, const nsRect& aFill, const CSSIntRect& aSrc,
|
|
StyleBorderImageRepeat aHFill, StyleBorderImageRepeat aVFill,
|
|
const nsSize& aUnitSize, uint8_t aIndex,
|
|
const Maybe<nsSize>& aSVGViewportSize, const bool aHasIntrinsicRatio) {
|
|
if (!IsReady()) {
|
|
MOZ_ASSERT_UNREACHABLE(
|
|
"Ensure PrepareImage() has returned true before "
|
|
"calling me");
|
|
return ImgDrawResult::BAD_ARGS;
|
|
}
|
|
|
|
if (aFill.IsEmpty() || aSrc.IsEmpty()) {
|
|
return ImgDrawResult::SUCCESS;
|
|
}
|
|
|
|
const bool isRequestBacked = mType == StyleImage::Tag::Url;
|
|
MOZ_ASSERT(isRequestBacked == mImage->IsImageRequestType());
|
|
|
|
if (isRequestBacked || mType == StyleImage::Tag::Element) {
|
|
nsCOMPtr<imgIContainer> subImage;
|
|
|
|
// To draw one portion of an image into a border component, we stretch that
|
|
// portion to match the size of that border component and then draw onto.
|
|
// However, preserveAspectRatio attribute of a SVG image may break this
|
|
// rule. To get correct rendering result, we add
|
|
// FLAG_FORCE_PRESERVEASPECTRATIO_NONE flag here, to tell mImage to ignore
|
|
// preserveAspectRatio attribute, and always do non-uniform stretch.
|
|
uint32_t drawFlags = ConvertImageRendererToDrawFlags(mFlags) |
|
|
imgIContainer::FLAG_FORCE_PRESERVEASPECTRATIO_NONE;
|
|
// For those SVG image sources which don't have fixed aspect ratio (i.e.
|
|
// without viewport size and viewBox), we should scale the source uniformly
|
|
// after the viewport size is decided by "Default Sizing Algorithm".
|
|
if (!aHasIntrinsicRatio) {
|
|
drawFlags = drawFlags | imgIContainer::FLAG_FORCE_UNIFORM_SCALING;
|
|
}
|
|
// Retrieve or create the subimage we'll draw.
|
|
nsIntRect srcRect(aSrc.x, aSrc.y, aSrc.width, aSrc.height);
|
|
if (isRequestBacked) {
|
|
subImage = ImageOps::Clip(mImageContainer, srcRect, aSVGViewportSize);
|
|
} else {
|
|
// This path, for eStyleImageType_Element, is currently slower than it
|
|
// needs to be because we don't cache anything. (In particular, if we have
|
|
// to draw to a temporary surface inside ClippedImage, we don't cache that
|
|
// temporary surface since we immediately throw the ClippedImage we create
|
|
// here away.) However, if we did cache, we'd need to know when to
|
|
// invalidate that cache, and it's not clear that it's worth the trouble
|
|
// since using border-image with -moz-element is rare.
|
|
|
|
RefPtr<gfxDrawable> drawable =
|
|
DrawableForElement(nsRect(nsPoint(), mSize), aRenderingContext);
|
|
if (!drawable) {
|
|
NS_WARNING("Could not create drawable for element");
|
|
return ImgDrawResult::TEMPORARY_ERROR;
|
|
}
|
|
|
|
nsCOMPtr<imgIContainer> image(ImageOps::CreateFromDrawable(drawable));
|
|
subImage = ImageOps::Clip(image, srcRect, aSVGViewportSize);
|
|
}
|
|
|
|
MOZ_ASSERT(!aSVGViewportSize ||
|
|
subImage->GetType() == imgIContainer::TYPE_VECTOR);
|
|
|
|
SamplingFilter samplingFilter =
|
|
nsLayoutUtils::GetSamplingFilterForFrame(mForFrame);
|
|
|
|
if (!RequiresScaling(aFill, aHFill, aVFill, aUnitSize)) {
|
|
ImgDrawResult result = nsLayoutUtils::DrawSingleImage(
|
|
aRenderingContext, aPresContext, subImage, samplingFilter, aFill,
|
|
aDirtyRect, SVGImageContext(), drawFlags);
|
|
|
|
if (!mImage->IsComplete()) {
|
|
result &= ImgDrawResult::SUCCESS_NOT_COMPLETE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
nsSize repeatSize;
|
|
nsRect fillRect(aFill);
|
|
nsRect tile = ComputeTile(fillRect, aHFill, aVFill, aUnitSize, repeatSize);
|
|
|
|
ImgDrawResult result = nsLayoutUtils::DrawBackgroundImage(
|
|
aRenderingContext, mForFrame, aPresContext, subImage, samplingFilter,
|
|
tile, fillRect, repeatSize, tile.TopLeft(), aDirtyRect, drawFlags,
|
|
ExtendMode::CLAMP, 1.0);
|
|
|
|
if (!mImage->IsComplete()) {
|
|
result &= ImgDrawResult::SUCCESS_NOT_COMPLETE;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
nsSize repeatSize(aFill.Size());
|
|
nsRect fillRect(aFill);
|
|
nsRect destTile =
|
|
RequiresScaling(fillRect, aHFill, aVFill, aUnitSize)
|
|
? ComputeTile(fillRect, aHFill, aVFill, aUnitSize, repeatSize)
|
|
: fillRect;
|
|
|
|
return Draw(aPresContext, aRenderingContext, aDirtyRect, destTile, fillRect,
|
|
destTile.TopLeft(), repeatSize, aSrc);
|
|
}
|
|
|
|
ImgDrawResult nsImageRenderer::DrawShapeImage(nsPresContext* aPresContext,
|
|
gfxContext& aRenderingContext) {
|
|
if (!IsReady()) {
|
|
MOZ_ASSERT_UNREACHABLE(
|
|
"Ensure PrepareImage() has returned true before "
|
|
"calling me");
|
|
return ImgDrawResult::NOT_READY;
|
|
}
|
|
|
|
if (mSize.width <= 0 || mSize.height <= 0) {
|
|
return ImgDrawResult::SUCCESS;
|
|
}
|
|
|
|
if (mImage->IsImageRequestType()) {
|
|
uint32_t drawFlags =
|
|
ConvertImageRendererToDrawFlags(mFlags) | imgIContainer::FRAME_FIRST;
|
|
nsRect dest(nsPoint(0, 0), mSize);
|
|
// We have a tricky situation in our choice of SamplingFilter. Shape
|
|
// images define a float area based on the alpha values in the rendered
|
|
// pixels. When multiple device pixels are used for one css pixel, the
|
|
// sampling can change crisp edges into aliased edges. For visual pixels,
|
|
// that's usually the right choice. For defining a float area, it can
|
|
// cause problems. If a style is using a shape-image-threshold value that
|
|
// is less than the alpha of the edge pixels, any filtering may smear the
|
|
// alpha into adjacent pixels and expand the float area in a confusing
|
|
// way. Since the alpha threshold can be set precisely in CSS, and since a
|
|
// web author may be counting on that threshold to define a precise float
|
|
// area from an image, it is least confusing to have the rendered pixels
|
|
// have unfiltered alpha. We use SamplingFilter::POINT to ensure that each
|
|
// rendered pixel has an alpha that precisely matches the alpha of the
|
|
// closest pixel in the image.
|
|
return nsLayoutUtils::DrawSingleImage(
|
|
aRenderingContext, aPresContext, mImageContainer, SamplingFilter::POINT,
|
|
dest, dest, SVGImageContext(), drawFlags);
|
|
}
|
|
|
|
if (mImage->IsGradient()) {
|
|
nsCSSGradientRenderer renderer = nsCSSGradientRenderer::Create(
|
|
aPresContext, mForFrame->Style(), *mGradientData, mSize);
|
|
nsRect dest(nsPoint(0, 0), mSize);
|
|
renderer.Paint(aRenderingContext, dest, dest, mSize,
|
|
CSSIntRect::FromAppUnitsRounded(dest), dest, 1.0);
|
|
return ImgDrawResult::SUCCESS;
|
|
}
|
|
|
|
// Unsupported image type.
|
|
return ImgDrawResult::BAD_IMAGE;
|
|
}
|
|
|
|
bool nsImageRenderer::IsRasterImage() {
|
|
return mImageContainer &&
|
|
mImageContainer->GetType() == imgIContainer::TYPE_RASTER;
|
|
}
|
|
|
|
already_AddRefed<imgIContainer> nsImageRenderer::GetImage() {
|
|
return do_AddRef(mImageContainer);
|
|
}
|