https://bugs.webkit.org/show_bug.cgi?id=52103

Source/WebCore:

Reviewed by Dean Jackson.

object-fit on renderers which use accelerated compositing needs special
treatment.

For directly composited images, and video, GraphicsLayer needs to know
both the size of the content layer, and also a rectangle at which this
should be clipped (because, for the first time, that content layer can be
larger than the renderer's content box).

AVFoundation would always aspect-ratio fit video by default, so plumb
through MediaPlayer a way to override that when object-fit requires it.

Added a LAYER_TREE_INCLUDES_CONTENT_LAYERS enum to the layerTreeAsText()
flags so we can dump content layers for testing.

Tests: compositing/images/direct-image-object-fit.html
       compositing/reflections/direct-image-object-fit-reflected.html
       compositing/video/video-object-fit.html

* page/Frame.h: New LayerTreeFlagsIncludeContentLayers flag.
* platform/graphics/GraphicsLayer.h: New flag.
* platform/graphics/MediaPlayer.cpp:
(WebCore::MediaPlayer::shouldMaintainAspectRatio):
(WebCore::MediaPlayer::setShouldMaintainAspectRatio):
* platform/graphics/MediaPlayer.h:
* platform/graphics/MediaPlayerPrivate.h:
(WebCore::MediaPlayerPrivateInterface::shouldMaintainAspectRatio):
(WebCore::MediaPlayerPrivateInterface::setShouldMaintainAspectRatio):
* platform/graphics/avfoundation/MediaPlayerPrivateAVFoundation.cpp:
(WebCore::MediaPlayerPrivateAVFoundation::MediaPlayerPrivateAVFoundation):
(WebCore::MediaPlayerPrivateAVFoundation::setShouldMaintainAspectRatio):
* platform/graphics/avfoundation/MediaPlayerPrivateAVFoundation.h:
* platform/graphics/avfoundation/cf/MediaPlayerPrivateAVFoundationCF.cpp:
(WebCore::MediaPlayerPrivateAVFoundationCF::updateVideoLayerGravity):
(WebCore::AVFWrapper::platformLayer):
* platform/graphics/avfoundation/cf/MediaPlayerPrivateAVFoundationCF.h:
* platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.h:
* platform/graphics/avfoundation/objc/MediaPlayerPrivateAVFoundationObjC.mm:
(WebCore::MediaPlayerPrivateAVFoundationObjC::createVideoLayer):
(WebCore::MediaPlayerPrivateAVFoundationObjC::updateVideoLayerGravity):
* platform/graphics/ca/GraphicsLayerCA.cpp: We need a new m_contentsClippingLayer to
clip the contents layer, which only gets created when necessary. It has to be cloned
for reflections.
(WebCore::GraphicsLayerCA::willBeDestroyed):
(WebCore::GraphicsLayerCA::setContentsRect):
(WebCore::GraphicsLayerCA::setContentsClippingRect):
(WebCore::GraphicsLayerCA::commitLayerChangesBeforeSublayers):
(WebCore::GraphicsLayerCA::updateSublayerList):
(WebCore::GraphicsLayerCA::updateContentsImage):
(WebCore::GraphicsLayerCA::updateContentsMediaLayer):
(WebCore::GraphicsLayerCA::updateContentsCanvasLayer):
(WebCore::GraphicsLayerCA::updateContentsColorLayer):
(WebCore::GraphicsLayerCA::updateContentsRects):
(WebCore::GraphicsLayerCA::dumpAdditionalProperties):
(WebCore::GraphicsLayerCA::ensureCloneLayers):
(WebCore::GraphicsLayerCA::removeCloneLayers):
(WebCore::GraphicsLayerCA::fetchCloneLayers):
* platform/graphics/ca/GraphicsLayerCA.h:
* rendering/RenderLayerBacking.cpp: Need to push both the contentsRect and
the contentsClippingRect down to the GraphicsLayers. Most of the time they
are the same, unless object-fit makes them different.
(WebCore::RenderLayerBacking::resetContentsRect):
(WebCore::RenderLayerBacking::positionOverflowControlsLayers):
(WebCore::RenderLayerBacking::updateDirectlyCompositedBackgroundColor):
(WebCore::RenderLayerBacking::updateDirectlyCompositedBackgroundImage):
(WebCore::RenderLayerBacking::updateImageContents):
(WebCore::RenderLayerBacking::contentsBox):
* rendering/RenderLayerCompositor.cpp:
(WebCore::RenderLayerCompositor::layerTreeAsText):
* rendering/RenderVideo.cpp:
(WebCore::RenderVideo::updatePlayer):
* testing/Internals.cpp:
(WebCore::Internals::layerTreeAsText):
* testing/Internals.h:
* testing/Internals.idl:

LayoutTests:

Reviewed by Dean Jackson.

Test cases for directly composited image with object-fit, the same with
reflections, and one with video.

Tests dump content GraphicsLayers, so have platform-specific results.

* compositing/images/direct-image-object-fit-expected.txt: Added.
* compositing/images/direct-image-object-fit.html: Added.
* compositing/reflections/direct-image-object-fit-reflected-expected.txt: Added.
* compositing/reflections/direct-image-object-fit-reflected.html: Added.
* compositing/video/video-object-fit-expected.txt: Added.
* compositing/video/video-object-fit.html: Added.
* media/video-object-fit-change.html: Fixed
* platform/mac/TestExpectations: Unskip two tests.
* platform/mac/compositing/images/direct-image-object-fit-expected.txt: Added.
* platform/mac/compositing/reflections/direct-image-object-fit-reflected-expected.txt: Added.
* platform/mac/compositing/video/video-object-fit-expected.txt: Added.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@154921 268f45cc-cd09-0410-ab3c-d52691b4dbfc