Reviewed by James Robinson.

        [chromium] Tile content and image layers
        https://bugs.webkit.org/show_bug.cgi?id=57113

        Rebaseline a number of image tests where slight filtering differences
        from using tiles caused test failures with exact pixel matching.
        None of these results are perceptually different.

        * platform/chromium-gpu-linux/compositing/color-matching/image-color-matching-expected.checksum:
        * platform/chromium-gpu-linux/compositing/color-matching/image-color-matching-expected.png:
        * platform/chromium-gpu-linux/compositing/text-on-large-layer-expected.checksum:
        * platform/chromium-gpu-linux/compositing/text-on-large-layer-expected.png:
        * platform/chromium-gpu-linux/fast/canvas/canvas-text-alignment-expected.checksum:
        * platform/chromium-gpu-linux/fast/canvas/canvas-text-alignment-expected.png:
        * platform/chromium-gpu-linux/fast/canvas/canvas-text-baseline-expected.checksum:
        * platform/chromium-gpu-linux/fast/canvas/canvas-text-baseline-expected.png:
        * platform/chromium-gpu-mac/compositing/color-matching/image-color-matching-expected.checksum:
        * platform/chromium-gpu-mac/compositing/color-matching/image-color-matching-expected.png:
        * platform/chromium-gpu-mac/compositing/text-on-large-layer-expected.checksum:
        * platform/chromium-gpu-mac/compositing/text-on-large-layer-expected.png:
        * platform/chromium-gpu-win/compositing/color-matching/image-color-matching-expected.checksum:
        * platform/chromium-gpu-win/compositing/color-matching/image-color-matching-expected.png:
        * platform/chromium-gpu-win/compositing/text-on-large-layer-expected.checksum:
        * platform/chromium-gpu-win/compositing/text-on-large-layer-expected.png:
        * platform/chromium-gpu-win/fast/canvas/canvas-text-alignment-expected.checksum:
        * platform/chromium-gpu-win/fast/canvas/canvas-text-alignment-expected.png:
        * platform/chromium-gpu-win/fast/canvas/canvas-text-baseline-expected.checksum:
        * platform/chromium-gpu-win/fast/canvas/canvas-text-baseline-expected.png:
        * platform/chromium/test_expectations.txt:
2011-04-14  Adrienne Walker  <enne@google.com>

        Reviewed by James Robinson.

        [chromium] Tile content and image layers
        https://bugs.webkit.org/show_bug.cgi?id=57113

        Layers tile by default if any dimension is larger than 512.  Smaller
        layers are contained within a single texture but still use the tiler
        infrastructure so that there's only one code path.

        Remove large layer support from content layers.  Content layers no
        longer own a platform canvas--they own a tiler.  Refactor tiler to
        allow for better separation of update/upload/paint.  Add rect
        parameter to update and draw functions on layers for the layer-space
        rect of interest.  This is necessary to know which tiles need to be
        drawn.

        * platform/graphics/chromium/ContentLayerChromium.cpp:
        (WebCore::ContentLayerChromium::ContentLayerChromium):
        (WebCore::ContentLayerChromium::~ContentLayerChromium):
        (WebCore::ContentLayerPainter::ContentLayerPainter):
        (WebCore::ContentLayerPainter::paint):
        (WebCore::ContentLayerChromium::paintContentsIfDirty):
        (WebCore::ContentLayerChromium::setLayerRenderer):
        (WebCore::ContentLayerChromium::tilingTransform):
        (WebCore::ContentLayerChromium::visibleLayerRect):
        (WebCore::ContentLayerChromium::layerBounds):
        (WebCore::ContentLayerChromium::updateLayerSize):
        (WebCore::ContentLayerChromium::draw):
        (WebCore::ContentLayerChromium::createTilerIfNeeded):
        (WebCore::ContentLayerChromium::updateCompositorResources):
        (WebCore::ContentLayerChromium::setTilingOption):
        (WebCore::ContentLayerChromium::bindContentsTexture):
        (WebCore::ContentLayerChromium::unreserveContentsTexture):
        (WebCore::ContentLayerChromium::setIsMask):
        (WebCore::ContentLayerChromium::dumpLayerProperties):
        * platform/graphics/chromium/ContentLayerChromium.h:
        (WebCore::ContentLayerChromium::drawsContent):
        * platform/graphics/chromium/GraphicsLayerChromium.cpp:
        (WebCore::GraphicsLayerChromium::setMaskLayer):
        * platform/graphics/chromium/ImageLayerChromium.cpp:
        (WebCore::ImageLayerChromium::paintContentsIfDirty):
        (WebCore::ImageLayerChromium::updateCompositorResources):
        (WebCore::ImageLayerChromium::layerBounds):
        (WebCore::ImageLayerChromium::tilingTransform):
        * platform/graphics/chromium/ImageLayerChromium.h:
        * platform/graphics/chromium/LayerChromium.h:
        (WebCore::LayerChromium::invalidateRect):
        (WebCore::LayerChromium::paintContentsIfDirty):
        (WebCore::LayerChromium::setIsMask):
        (WebCore::LayerChromium::draw):
        * platform/graphics/chromium/LayerRendererChromium.cpp:
        (WebCore::LayerRendererChromium::drawRootLayer):
        (WebCore::LayerRendererChromium::drawLayers):
        (WebCore::LayerRendererChromium::paintContentsRecursive):
        (WebCore::LayerRendererChromium::copyOffscreenTextureToDisplay):
        (WebCore::LayerRendererChromium::drawLayer):
        (WebCore::LayerRendererChromium::initializeSharedObjects):
        (WebCore::LayerRendererChromium::cleanupSharedObjects):
        * platform/graphics/chromium/LayerRendererChromium.h:
        * platform/graphics/chromium/LayerTilerChromium.cpp:
        (WebCore::LayerTilerChromium::setTileSize):
        (WebCore::LayerTilerChromium::getSingleTexture):
        (WebCore::LayerTilerChromium::invalidateRect):
        (WebCore::LayerTilerChromium::update):
        (WebCore::LayerTilerChromium::uploadCanvas):
        (WebCore::LayerTilerChromium::updateFromPixels):
        (WebCore::LayerTilerChromium::draw):
        (WebCore::LayerTilerChromium::unreserveTextures):
        * platform/graphics/chromium/LayerTilerChromium.h:
        (WebCore::LayerTilerChromium::setLayerRenderer):
        (WebCore::LayerTilerChromium::skipsDraw):
        * platform/graphics/chromium/PlatformCanvas.cpp:
        (WebCore::PlatformCanvas::AutoLocker::AutoLocker):
        (WebCore::PlatformCanvas::Painter::Painter):
        * platform/graphics/chromium/PlatformCanvas.h:
        * platform/graphics/chromium/RenderSurfaceChromium.cpp:
        (WebCore::RenderSurfaceChromium::draw):
        * platform/graphics/chromium/RenderSurfaceChromium.h:
        * platform/graphics/chromium/cc/CCCanvasLayerImpl.cpp:
        (WebCore::CCCanvasLayerImpl::draw):
        * platform/graphics/chromium/cc/CCCanvasLayerImpl.h:
        * platform/graphics/chromium/cc/CCHeadsUpDisplay.cpp:
        (WebCore::CCHeadsUpDisplay::draw):
        * platform/graphics/chromium/cc/CCLayerImpl.cpp:
        (WebCore::CCLayerImpl::draw):
        * platform/graphics/chromium/cc/CCLayerImpl.h:
        * platform/graphics/chromium/cc/CCPluginLayerImpl.cpp:
        (WebCore::CCPluginLayerImpl::draw):
        * platform/graphics/chromium/cc/CCPluginLayerImpl.h:
        * platform/graphics/chromium/cc/CCVideoLayerImpl.cpp:
        (WebCore::CCVideoLayerImpl::draw):
        * platform/graphics/chromium/cc/CCVideoLayerImpl.h:

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@83915 268f45cc-cd09-0410-ab3c-d52691b4dbfc