1 files changed, 295 insertions, 1 deletions

diff --git a/cc/layer_tree_host.h b/cc/layer_tree_host.h
index 638cbb2..277b1f0 100644
--- a/cc/layer_tree_host.h
+++ b/cc/layer_tree_host.h
@@ -1,3 +1,297 @@
-// Copyright 2012 The Chromium Authors. All rights reserved.
+// Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
+
+#ifndef CCLayerTreeHost_h
+#define CCLayerTreeHost_h
+
+#include "base/basictypes.h"
+#include "base/hash_tables.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "CCAnimationEvents.h"
+#include "CCGraphicsContext.h"
+#include "CCLayerTreeHostClient.h"
+#include "CCLayerTreeHostCommon.h"
+#include "CCOcclusionTracker.h"
+#include "CCPrioritizedTextureManager.h"
+#include "CCProxy.h"
+#include "CCRenderingStats.h"
+#include "IntRect.h"
+#include "RateLimiter.h"
+#include "scoped_ptr_vector.h"
+#include "SkColor.h"
+#include <limits>
+
+#if defined(COMPILER_GCC)
+namespace BASE_HASH_NAMESPACE {
+template<>
+struct hash<WebKit::WebGraphicsContext3D*> {
+  size_t operator()(WebKit::WebGraphicsContext3D* ptr) const {
+    return hash<size_t>()(reinterpret_cast<size_t>(ptr));
+  }
+};
+} // namespace BASE_HASH_NAMESPACE
+#endif // COMPILER
+
+namespace cc {
+
+class CCFontAtlas;
+class CCLayerChromium;
+class CCLayerTreeHostImpl;
+class CCLayerTreeHostImplClient;
+class CCPrioritizedTextureManager;
+class CCTextureUpdateQueue;
+class HeadsUpDisplayLayerChromium;
+class Region;
+struct CCScrollAndScaleSet;
+
+struct CCLayerTreeSettings {
+    CCLayerTreeSettings();
+    ~CCLayerTreeSettings();
+
+    bool acceleratePainting;
+    bool showFPSCounter;
+    bool showPlatformLayerTree;
+    bool showPaintRects;
+    bool showPropertyChangedRects;
+    bool showSurfaceDamageRects;
+    bool showScreenSpaceRects;
+    bool showReplicaScreenSpaceRects;
+    bool showOccludingRects;
+    bool renderVSyncEnabled;
+    double refreshRate;
+    size_t maxPartialTextureUpdates;
+    IntSize defaultTileSize;
+    IntSize maxUntiledLayerSize;
+    IntSize minimumOcclusionTrackingSize;
+
+    bool showDebugInfo() const { return showPlatformLayerTree || showFPSCounter || showDebugRects(); }
+    bool showDebugRects() const { return showPaintRects || showPropertyChangedRects || showSurfaceDamageRects || showScreenSpaceRects || showReplicaScreenSpaceRects || showOccludingRects; }
+};
+
+// Provides information on an Impl's rendering capabilities back to the CCLayerTreeHost
+struct RendererCapabilities {
+    RendererCapabilities();
+    ~RendererCapabilities();
+
+    GC3Denum bestTextureFormat;
+    bool contextHasCachedFrontBuffer;
+    bool usingPartialSwap;
+    bool usingAcceleratedPainting;
+    bool usingSetVisibility;
+    bool usingSwapCompleteCallback;
+    bool usingGpuMemoryManager;
+    bool usingDiscardFramebuffer;
+    bool usingEglImage;
+    int maxTextureSize;
+};
+
+class CCLayerTreeHost : public RateLimiterClient {
+public:
+    static scoped_ptr<CCLayerTreeHost> create(CCLayerTreeHostClient*, const CCLayerTreeSettings&);
+    virtual ~CCLayerTreeHost();
+
+    void setSurfaceReady();
+
+    // Returns true if any CCLayerTreeHost is alive.
+    static bool anyLayerTreeHostInstanceExists();
+
+    static bool needsFilterContext() { return s_needsFilterContext; }
+    static void setNeedsFilterContext(bool needsFilterContext) { s_needsFilterContext = needsFilterContext; }
+    bool needsSharedContext() const { return needsFilterContext() || settings().acceleratePainting; }
+
+    // CCLayerTreeHost interface to CCProxy.
+    void willBeginFrame() { m_client->willBeginFrame(); }
+    void didBeginFrame() { m_client->didBeginFrame(); }
+    void updateAnimations(double monotonicFrameBeginTime);
+    void layout();
+    void beginCommitOnImplThread(CCLayerTreeHostImpl*);
+    void finishCommitOnImplThread(CCLayerTreeHostImpl*);
+    void willCommit();
+    void commitComplete();
+    scoped_ptr<CCGraphicsContext> createContext();
+    scoped_ptr<CCInputHandler> createInputHandler();
+    virtual scoped_ptr<CCLayerTreeHostImpl> createLayerTreeHostImpl(CCLayerTreeHostImplClient*);
+    void didLoseContext();
+    enum RecreateResult {
+        RecreateSucceeded,
+        RecreateFailedButTryAgain,
+        RecreateFailedAndGaveUp,
+    };
+    RecreateResult recreateContext();
+    void didCommitAndDrawFrame() { m_client->didCommitAndDrawFrame(); }
+    void didCompleteSwapBuffers() { m_client->didCompleteSwapBuffers(); }
+    void deleteContentsTexturesOnImplThread(CCResourceProvider*);
+    virtual void acquireLayerTextures();
+    // Returns false if we should abort this frame due to initialization failure.
+    bool initializeRendererIfNeeded();
+    void updateLayers(CCTextureUpdateQueue&, size_t contentsMemoryLimitBytes);
+
+    CCLayerTreeHostClient* client() { return m_client; }
+
+    // Only used when compositing on the main thread.
+    void composite();
+    void scheduleComposite();
+
+    // 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.
+    bool compositeAndReadback(void *pixels, const IntRect&);
+
+    void finishAllRendering();
+
+    int commitNumber() const { return m_commitNumber; }
+
+    void renderingStats(CCRenderingStats*) const;
+
+    const RendererCapabilities& rendererCapabilities() const;
+
+    // Test only hook
+    void loseContext(int numTimes);
+
+    void setNeedsAnimate();
+    // virtual for testing
+    virtual void setNeedsCommit();
+    void setNeedsRedraw();
+    bool commitRequested() const;
+
+    void setAnimationEvents(scoped_ptr<CCAnimationEventsVector>, double wallClockTime);
+    virtual void didAddAnimation();
+
+    LayerChromium* rootLayer() { return m_rootLayer.get(); }
+    const LayerChromium* rootLayer() const { return m_rootLayer.get(); }
+    void setRootLayer(scoped_refptr<LayerChromium>);
+
+    const CCLayerTreeSettings& settings() const { return m_settings; }
+
+    void setViewportSize(const IntSize& layoutViewportSize, const IntSize& deviceViewportSize);
+
+    const IntSize& layoutViewportSize() const { return m_layoutViewportSize; }
+    const IntSize& deviceViewportSize() const { return m_deviceViewportSize; }
+
+    void setPageScaleFactorAndLimits(float pageScaleFactor, float minPageScaleFactor, float maxPageScaleFactor);
+
+    void setBackgroundColor(SkColor color) { m_backgroundColor = color; }
+
+    void setHasTransparentBackground(bool transparent) { m_hasTransparentBackground = transparent; }
+
+    CCPrioritizedTextureManager* contentsTextureManager() const;
+
+    // Delete contents textures' backing resources until they use only bytesLimit bytes. This may
+    // be called on the impl thread while the main thread is running.
+    void reduceContentsTexturesMemoryOnImplThread(size_t bytesLimit, CCResourceProvider*);
+    // Returns true if there any evicted backing textures that have not been deleted.
+    bool evictedContentsTexturesBackingsExist() const;
+    // Retrieve the list of all contents textures' backings that have been evicted, to pass to the
+    // main thread to unlink them from their owning textures.
+    void getEvictedContentTexturesBackings(CCPrioritizedTextureManager::BackingVector&);
+    // Unlink the list of contents textures' backings from their owning textures on the main thread
+    // before updating layers.
+    void unlinkEvictedContentTexturesBackings(const CCPrioritizedTextureManager::BackingVector&);
+    // Deletes all evicted backings, unlinking them from their owning textures if needed.
+    // Returns true if this function had to unlink any backings from their owning texture when
+    // destroying them. If this was the case, the impl layer tree may contain invalid resources.
+    bool deleteEvictedContentTexturesBackings();
+
+    bool visible() const { return m_visible; }
+    void setVisible(bool);
+
+    void startPageScaleAnimation(const IntSize& targetPosition, bool useAnchor, float scale, double durationSec);
+
+    void applyScrollAndScale(const CCScrollAndScaleSet&);
+    void setImplTransform(const WebKit::WebTransformationMatrix&);
+
+    void startRateLimiter(WebKit::WebGraphicsContext3D*);
+    void stopRateLimiter(WebKit::WebGraphicsContext3D*);
+
+    // RateLimitClient implementation
+    virtual void rateLimit() OVERRIDE;
+
+    bool bufferedUpdates();
+    bool requestPartialTextureUpdate();
+    void deleteTextureAfterCommit(scoped_ptr<CCPrioritizedTexture>);
+
+    void setDeviceScaleFactor(float);
+    float deviceScaleFactor() const { return m_deviceScaleFactor; }
+
+    void setFontAtlas(scoped_ptr<CCFontAtlas>);
+
+    HeadsUpDisplayLayerChromium* hudLayer() const { return m_hudLayer.get(); }
+
+protected:
+    CCLayerTreeHost(CCLayerTreeHostClient*, const CCLayerTreeSettings&);
+    bool initialize();
+
+private:
+    typedef std::vector<scoped_refptr<LayerChromium> > LayerList;
+
+    void initializeRenderer();
+
+    void update(LayerChromium*, CCTextureUpdateQueue&, const CCOcclusionTracker*);
+    bool paintLayerContents(const LayerList&, CCTextureUpdateQueue&);
+    bool paintMasksForRenderSurface(LayerChromium*, CCTextureUpdateQueue&);
+
+    void updateLayers(LayerChromium*, CCTextureUpdateQueue&);
+
+    void prioritizeTextures(const LayerList&, CCOverdrawMetrics&); 
+    void setPrioritiesForSurfaces(size_t surfaceMemoryBytes);
+    void setPrioritiesForLayers(const LayerList&);
+    size_t calculateMemoryForRenderSurfaces(const LayerList& updateList);
+
+    void animateLayers(double monotonicTime);
+    bool animateLayersRecursive(LayerChromium* current, double monotonicTime);
+    void setAnimationEventsRecursive(const CCAnimationEventsVector&, LayerChromium*, double wallClockTime);
+
+    bool m_animating;
+    bool m_needsAnimateLayers;
+
+    CCLayerTreeHostClient* m_client;
+
+    int m_commitNumber;
+    CCRenderingStats m_renderingStats;
+
+    scoped_ptr<CCProxy> m_proxy;
+    bool m_rendererInitialized;
+    bool m_contextLost;
+    int m_numTimesRecreateShouldFail;
+    int m_numFailedRecreateAttempts;
+
+    scoped_refptr<LayerChromium> m_rootLayer;
+    scoped_refptr<HeadsUpDisplayLayerChromium> m_hudLayer;
+    scoped_ptr<CCFontAtlas> m_fontAtlas;
+
+    scoped_ptr<CCPrioritizedTextureManager> m_contentsTextureManager;
+    scoped_ptr<CCPrioritizedTexture> m_surfaceMemoryPlaceholder;
+
+    CCLayerTreeSettings m_settings;
+
+    IntSize m_layoutViewportSize;
+    IntSize m_deviceViewportSize;
+    float m_deviceScaleFactor;
+
+    bool m_visible;
+
+    typedef base::hash_map<WebKit::WebGraphicsContext3D*, scoped_refptr<RateLimiter> > RateLimiterMap;
+    RateLimiterMap m_rateLimiters;
+
+    float m_pageScaleFactor;
+    float m_minPageScaleFactor, m_maxPageScaleFactor;
+    WebKit::WebTransformationMatrix m_implTransform;
+    bool m_triggerIdleUpdates;
+
+    SkColor m_backgroundColor;
+    bool m_hasTransparentBackground;
+
+    typedef ScopedPtrVector<CCPrioritizedTexture> TextureList;
+    TextureList m_deleteTextureAfterCommitList;
+    size_t m_partialTextureUpdateRequests;
+
+    static bool s_needsFilterContext;
+
+    DISALLOW_COPY_AND_ASSIGN(CCLayerTreeHost);
+};
+
+}  // namespace cc
+
+#endif