tree 5051368aae2018f0bfbc7ed9be4ba0fa18af84e2
parent 5d19c42ed6510f022199995c3001433c3c135745
author timothy_horton@apple.com <timothy_horton@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1575162409 +0000
committer timothy_horton@apple.com <timothy_horton@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1575162409 +0000

Reimplement some PlatformCALayer methods using GraphicsContext instead of CGContextRef
https://bugs.webkit.org/show_bug.cgi?id=204698

Reviewed by Sam Weinig.

Source/WebCore:

In order to make PlatformCALayer-level DisplayList recording possible,
reimplement a few methods in terms of WebCore::GraphicsContext instead
of CGContextRef directly. Namely, collectRectsToPaint, drawLayerContents,
and drawRepaintIndicator.

In the drawLayerContents case, there are operations (like setting the
AppKit global graphics context) that cannot be done without a platform
context. In those cases, we skip that operation if we don't have a
platform context.

Anything depending on this downstream will break and need to be
implemented a different way in the DisplayList case.

* platform/graphics/GraphicsContext.h:
* platform/graphics/ca/PlatformCALayer.cpp:
(WebCore::PlatformCALayer::drawRepaintIndicator):
* platform/graphics/ca/PlatformCALayer.h:
* platform/graphics/ca/TileGrid.cpp:
(WebCore::TileGrid::platformCALayerPaintContents):
* platform/graphics/ca/cocoa/PlatformCALayerCocoa.h:
* platform/graphics/ca/cocoa/PlatformCALayerCocoa.mm:
(WebCore::PlatformCALayer::collectRectsToPaint):
(WebCore::PlatformCALayer::drawLayerContents):
(WebCore::PlatformCALayerCocoa::enumerateRectsBeingDrawn):
* platform/graphics/ca/win/PlatformCALayerWin.cpp:
(PlatformCALayer::collectRectsToPaint):
* platform/graphics/mac/WebLayer.mm:
(-[WebLayer drawInContext:]):

Source/WebKit:

* Shared/RemoteLayerTree/RemoteLayerBackingStore.h:
* Shared/RemoteLayerTree/RemoteLayerBackingStore.mm:
(WebKit::RemoteLayerBackingStore::drawInContext):
(WebKit::RemoteLayerBackingStore::enumerateRectsBeingDrawn):
* WebProcess/WebPage/RemoteLayerTree/PlatformCALayerRemote.cpp:
(WebKit::PlatformCALayerRemote::enumerateRectsBeingDrawn):
* WebProcess/WebPage/RemoteLayerTree/PlatformCALayerRemote.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@252962 268f45cc-cd09-0410-ab3c-d52691b4dbfc