void VideoPainter::paintReplaced(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
WebMediaPlayer* mediaPlayer = m_layoutVideo.mediaElement()->webMediaPlayer();
bool displayingPoster = m_layoutVideo.videoElement()->shouldDisplayPosterImage();
if (!displayingPoster && !mediaPlayer)
return;
LayoutRect rect(m_layoutVideo.videoBox());
if (rect.isEmpty())
return;
rect.moveBy(paintOffset);
GraphicsContext& context = paintInfo.context;
LayoutRect contentRect = m_layoutVideo.contentBoxRect();
contentRect.moveBy(paintOffset);
Optional<ClipRecorder> clipRecorder;
if (!contentRect.contains(rect)) {
clipRecorder.emplace(context, m_layoutVideo, paintInfo.displayItemTypeForClipping(), contentRect);
}
if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, m_layoutVideo, paintInfo.phase, paintOffset))
return;
LayoutObjectDrawingRecorder drawingRecorder(context, m_layoutVideo, paintInfo.phase, contentRect, paintOffset);
// Video frames are only painted in software for printing or capturing node images via web APIs.
bool forceSoftwareVideoPaint = paintInfo.globalPaintFlags() & GlobalPaintFlattenCompositingLayers;
if (displayingPoster || !forceSoftwareVideoPaint) {
// This will display the poster image, if one is present, and otherwise paint nothing.
ImagePainter(m_layoutVideo).paintIntoRect(context, rect);
} else {
SkPaint videoPaint = context.fillPaint();
videoPaint.setColor(SK_ColorBLACK);
m_layoutVideo.videoElement()->paintCurrentFrame(context.canvas(), pixelSnappedIntRect(rect), &videoPaint);
}
}
void ViewPainter::paintBoxDecorationBackground(const PaintInfo& paintInfo)
{
if (paintInfo.skipRootBackground())
return;
// This function overrides background painting for the LayoutView.
// View background painting is special in the following ways:
// 1. The view paints background for the root element, the background positioning respects
// the positioning and transformation of the root element.
// 2. CSS background-clip is ignored, the background layers always expand to cover the whole
// canvas. None of the stacking context effects (except transformation) on the root element
// affects the background.
// 3. The main frame is also responsible for painting the user-agent-defined base background
// color. Conceptually it should be painted by the embedder but painting it here allows
// culling and pre-blending optimization when possible.
GraphicsContext& context = paintInfo.context;
if (LayoutObjectDrawingRecorder::useCachedDrawingIfPossible(context, m_layoutView, DisplayItem::DocumentBackground, LayoutPoint()))
return;
// The background fill rect is the size of the LayoutView's main GraphicsLayer.
IntRect backgroundRect = pixelSnappedIntRect(m_layoutView.layer()->boundingBoxForCompositing());
const Document& document = m_layoutView.document();
const FrameView& frameView = *m_layoutView.frameView();
bool isMainFrame = !document.ownerElement();
bool paintsBaseBackground = isMainFrame && !frameView.isTransparent();
bool shouldClearCanvas = paintsBaseBackground && (document.settings() && document.settings()->shouldClearDocumentBackground());
Color baseBackgroundColor = paintsBaseBackground ? frameView.baseBackgroundColor() : Color();
Color rootBackgroundColor = m_layoutView.style()->visitedDependentColor(CSSPropertyBackgroundColor);
const LayoutObject* rootObject = document.documentElement() ? document.documentElement()->layoutObject() : nullptr;
LayoutObjectDrawingRecorder recorder(context, m_layoutView, DisplayItem::DocumentBackground, backgroundRect, LayoutPoint());
// Special handling for print economy mode.
bool forceBackgroundToWhite = BoxPainter::shouldForceWhiteBackgroundForPrintEconomy(m_layoutView.styleRef(), document);
if (forceBackgroundToWhite) {
// If for any reason the view background is not transparent, paint white instead, otherwise keep transparent as is.
if (paintsBaseBackground || rootBackgroundColor.alpha() || m_layoutView.style()->backgroundLayers().image())
context.fillRect(backgroundRect, Color::white, SkXfermode::kSrc_Mode);
return;
}
// Compute the enclosing rect of the view, in root element space.
//
// For background colors we can simply paint the document rect in the default space.
// However for background image, the root element transform applies. The strategy is to apply
// root element transform on the context and issue draw commands in the local space, therefore
// we need to apply inverse transform on the document rect to get to the root element space.
bool backgroundRenderable = true;
TransformationMatrix transform;
IntRect paintRect = backgroundRect;
if (!rootObject || !rootObject->isBox()) {
backgroundRenderable = false;
} else if (rootObject->hasLayer()) {
const PaintLayer& rootLayer = *toLayoutBoxModelObject(rootObject)->layer();
LayoutPoint offset;
rootLayer.convertToLayerCoords(nullptr, offset);
transform.translate(offset.x(), offset.y());
transform.multiply(rootLayer.renderableTransform(paintInfo.globalPaintFlags()));
if (!transform.isInvertible()) {
backgroundRenderable = false;
} else {
bool isClamped;
paintRect = transform.inverse().projectQuad(FloatQuad(backgroundRect), &isClamped).enclosingBoundingBox();
backgroundRenderable = !isClamped;
}
}
if (!backgroundRenderable) {
if (baseBackgroundColor.alpha())
context.fillRect(backgroundRect, baseBackgroundColor, shouldClearCanvas ? SkXfermode::kSrc_Mode : SkXfermode::kSrcOver_Mode);
else if (shouldClearCanvas)
context.fillRect(backgroundRect, Color(), SkXfermode::kClear_Mode);
return;
}
BoxPainter::FillLayerOcclusionOutputList reversedPaintList;
bool shouldDrawBackgroundInSeparateBuffer = BoxPainter(m_layoutView).calculateFillLayerOcclusionCulling(reversedPaintList, m_layoutView.style()->backgroundLayers());
ASSERT(reversedPaintList.size());
// If the root background color is opaque, isolation group can be skipped because the canvas
// will be cleared by root background color.
if (!rootBackgroundColor.hasAlpha())
shouldDrawBackgroundInSeparateBuffer = false;
// We are going to clear the canvas with transparent pixels, isolation group can be skipped.
if (!baseBackgroundColor.alpha() && shouldClearCanvas)
shouldDrawBackgroundInSeparateBuffer = false;
if (shouldDrawBackgroundInSeparateBuffer) {
if (baseBackgroundColor.alpha())
context.fillRect(backgroundRect, baseBackgroundColor, shouldClearCanvas ? SkXfermode::kSrc_Mode : SkXfermode::kSrcOver_Mode);
context.beginLayer();
}
Color combinedBackgroundColor = shouldDrawBackgroundInSeparateBuffer ? rootBackgroundColor : baseBackgroundColor.blend(rootBackgroundColor);
if (combinedBackgroundColor.alpha()) {
if (!combinedBackgroundColor.hasAlpha() && RuntimeEnabledFeatures::slimmingPaintV2Enabled())
recorder.setKnownToBeOpaque();
context.fillRect(backgroundRect, combinedBackgroundColor, (shouldDrawBackgroundInSeparateBuffer || shouldClearCanvas) ? SkXfermode::kSrc_Mode : SkXfermode::kSrcOver_Mode);
} else if (shouldClearCanvas && !shouldDrawBackgroundInSeparateBuffer) {
context.fillRect(backgroundRect, Color(), SkXfermode::kClear_Mode);
}
for (auto it = reversedPaintList.rbegin(); it != reversedPaintList.rend(); ++it) {
ASSERT((*it)->clip() == BorderFillBox);
bool shouldPaintInViewportSpace = (*it)->attachment() == FixedBackgroundAttachment;
if (shouldPaintInViewportSpace) {
BoxPainter::paintFillLayer(m_layoutView, paintInfo, Color(), **it, LayoutRect(LayoutRect::infiniteIntRect()), BackgroundBleedNone);
} else {
context.save();
// TODO(trchen): We should be able to handle 3D-transformed root
// background with slimming paint by using transform display items.
context.concatCTM(transform.toAffineTransform());
BoxPainter::paintFillLayer(m_layoutView, paintInfo, Color(), **it, LayoutRect(paintRect), BackgroundBleedNone);
context.restore();
}
}
if (shouldDrawBackgroundInSeparateBuffer)
context.endLayer();
}
void InlineFlowBoxPainter::paintMask(const PaintInfo& paintInfo, const LayoutPoint& paintOffset)
{
if (m_inlineFlowBox.lineLayoutItem().style()->visibility() != VISIBLE || paintInfo.phase != PaintPhaseMask)
return;
LayoutRect frameRect = frameRectClampedToLineTopAndBottomIfNeeded();
// Move x/y to our coordinates.
LayoutRect localRect(frameRect);
m_inlineFlowBox.flipForWritingMode(localRect);
LayoutPoint adjustedPaintOffset = paintOffset + localRect.location();
const NinePieceImage& maskNinePieceImage = m_inlineFlowBox.lineLayoutItem().style()->maskBoxImage();
StyleImage* maskBoxImage = m_inlineFlowBox.lineLayoutItem().style()->maskBoxImage().image();
// Figure out if we need to push a transparency layer to render our mask.
bool pushTransparencyLayer = false;
bool compositedMask = m_inlineFlowBox.lineLayoutItem().hasLayer() && m_inlineFlowBox.boxModelObject().layer()->hasCompositedMask();
bool flattenCompositingLayers = paintInfo.globalPaintFlags() & GlobalPaintFlattenCompositingLayers;
SkXfermode::Mode compositeOp = SkXfermode::kSrcOver_Mode;
if (!compositedMask || flattenCompositingLayers) {
if ((maskBoxImage && m_inlineFlowBox.lineLayoutItem().style()->maskLayers().hasImage()) || m_inlineFlowBox.lineLayoutItem().style()->maskLayers().next()) {
pushTransparencyLayer = true;
paintInfo.context.beginLayer(1.0f, SkXfermode::kDstIn_Mode);
} else {
// TODO(fmalita): passing a dst-in xfer mode down to paintFillLayers/paintNinePieceImage
// seems dangerous: it is only correct if applied atomically (single draw call). While
// the heuristic above presumably ensures that is the case, this approach seems super
// fragile. We should investigate dropping this optimization in favour of the more
// robust layer branch above.
compositeOp = SkXfermode::kDstIn_Mode;
}
}
LayoutRect paintRect = LayoutRect(adjustedPaintOffset, frameRect.size());
paintFillLayers(paintInfo, Color::transparent, m_inlineFlowBox.lineLayoutItem().style()->maskLayers(), paintRect, compositeOp);
bool hasBoxImage = maskBoxImage && maskBoxImage->canRender();
if (!hasBoxImage || !maskBoxImage->isLoaded()) {
if (pushTransparencyLayer)
paintInfo.context.endLayer();
return; // Don't paint anything while we wait for the image to load.
}
LayoutBoxModelObject* boxModel = toLayoutBoxModelObject(LineLayoutAPIShim::layoutObjectFrom(m_inlineFlowBox.boxModelObject()));
// The simple case is where we are the only box for this object. In those
// cases only a single call to draw is required.
if (!m_inlineFlowBox.prevLineBox() && !m_inlineFlowBox.nextLineBox()) {
BoxPainter::paintNinePieceImage(*boxModel, paintInfo.context, paintRect, m_inlineFlowBox.lineLayoutItem().styleRef(), maskNinePieceImage, compositeOp);
} else {
// We have a mask image that spans multiple lines.
// FIXME: What the heck do we do with RTL here? The math we're using is obviously not right,
// but it isn't even clear how this should work at all.
LayoutRect imageStripPaintRect = paintRectForImageStrip(adjustedPaintOffset, frameRect.size(), LTR);
FloatRect clipRect(clipRectForNinePieceImageStrip(m_inlineFlowBox, maskNinePieceImage, paintRect));
GraphicsContextStateSaver stateSaver(paintInfo.context);
// TODO(chrishtr): this should be pixel-snapped.
paintInfo.context.clip(clipRect);
BoxPainter::paintNinePieceImage(*boxModel, paintInfo.context, imageStripPaintRect, m_inlineFlowBox.lineLayoutItem().styleRef(), maskNinePieceImage, compositeOp);
}
if (pushTransparencyLayer)
paintInfo.context.endLayer();
}