/* * Copyright (C) 2011 Google Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef WebLayerTreeView_h #define WebLayerTreeView_h #include "WebColor.h" #include "WebCommon.h" #include "WebFloatPoint.h" #include "WebNonCopyable.h" #include "WebPrivateOwnPtr.h" #include "WebSize.h" class SkBitmap; namespace blink { class WebGraphicsContext3D; class WebLayer; struct WebPoint; struct WebRect; struct WebRenderingStats; class WebLayerTreeView { public: virtual ~WebLayerTreeView() { } // Initialization and lifecycle -------------------------------------- // Indicates that the compositing surface used by this WebLayerTreeView is ready to use. // A WebLayerTreeView may request a context from its client before the surface is ready, // but it won't attempt to use it. virtual void setSurfaceReady() = 0; // Sets the root of the tree. The root is set by way of the constructor. virtual void setRootLayer(const WebLayer&) = 0; virtual void clearRootLayer() = 0; // View properties --------------------------------------------------- virtual void setViewportSize(const WebSize& layoutViewportSize, const WebSize& deviceViewportSize) = 0; // Gives the viewport size in layer space. virtual WebSize layoutViewportSize() const = 0; // Gives the viewport size in physical device pixels (may be different // from the above if there exists page scale, device scale or fixed layout // mode). virtual WebSize deviceViewportSize() const = 0; virtual void setDeviceScaleFactor(float) = 0; virtual float deviceScaleFactor() const = 0; // Sets the background color for the viewport. virtual void setBackgroundColor(WebColor) = 0; // Sets the background transparency for the viewport. The default is 'false'. virtual void setHasTransparentBackground(bool) = 0; // Sets the overhang gutter bitmap. virtual void setOverhangBitmap(const SkBitmap&) { } // Sets whether this view is visible. In threaded mode, a view that is not visible will not // composite or trigger updateAnimations() or layout() calls until it becomes visible. virtual void setVisible(bool) = 0; // Sets the current page scale factor and minimum / maximum limits. Both limits are initially 1 (no page scale allowed). virtual void setPageScaleFactorAndLimits(float pageScaleFactor, float minimum, float maximum) = 0; // Starts an animation of the page scale to a target scale factor and scroll offset. // If useAnchor is true, destination is a point on the screen that will remain fixed for the duration of the animation. // If useAnchor is false, destination is the final top-left scroll position. virtual void startPageScaleAnimation(const WebPoint& destination, bool useAnchor, float newPageScale, double durationSec) = 0; // Flow control and scheduling --------------------------------------- // Indicates that an animation needs to be updated. virtual void setNeedsAnimate() = 0; // Indicates whether a commit is pending. virtual bool commitRequested() const = 0; // Relays the end of a fling animation. virtual void didStopFlinging() { } // Composites and attempts to read back the result into the provided // buffer. If it wasn't possible, e.g. due to context lost, will return // false. Pixel format is 32bit (RGBA), and the provided buffer must be // large enough contain viewportSize().width() * viewportSize().height() // pixels. The WebLayerTreeView does not assume ownership of the buffer. // The buffer is not modified if the false is returned. virtual bool compositeAndReadback(void *pixels, const WebRect&) = 0; // Blocks until the most recently composited frame has finished rendering on the GPU. // This can have a significant performance impact and should be used with care. virtual void finishAllRendering() = 0; // Prevents updates to layer tree from becoming visible. virtual void setDeferCommits(bool deferCommits) { } // Take responsiblity for this layer's animations, even if this layer hasn't yet // been added to the tree. virtual void registerForAnimations(WebLayer* layer) { } // Identify key layers to the compositor when using the pinch virtual viewport. virtual void registerViewportLayers( const WebLayer* pageScaleLayerLayer, const WebLayer* innerViewportScrollLayer, const WebLayer* outerViewportScrollLayer) { } virtual void clearViewportLayers() { } // Debugging / dangerous --------------------------------------------- // Toggles the FPS counter in the HUD layer virtual void setShowFPSCounter(bool) { } // Toggles the paint rects in the HUD layer virtual void setShowPaintRects(bool) { } // Toggles the debug borders on layers virtual void setShowDebugBorders(bool) { } // Toggles continuous painting virtual void setContinuousPaintingEnabled(bool) { } // Toggles scroll bottleneck rects on the HUD layer virtual void setShowScrollBottleneckRects(bool) { } }; } // namespace blink #endif // WebLayerTreeView_h