Part 8 of cc/ directory shuffles: resources

cc/prioritized_resource_manager.h

Index: cc/prioritized_resource_manager.h
diff --git a/cc/prioritized_resource_manager.h b/cc/prioritized_resource_manager.h
deleted file mode 100644
index 4e2579ed5ffe5b9aafc064c68daf7b14da860ab4..0000000000000000000000000000000000000000
--- a/cc/prioritized_resource_manager.h
+++ /dev/null
@@ -1,218 +0,0 @@
-// Copyright 2012 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 CC_PRIORITIZED_RESOURCE_MANAGER_H_
-#define CC_PRIORITIZED_RESOURCE_MANAGER_H_
-
-#include <list>
-#include <vector>
-
-#include "base/basictypes.h"
-#include "base/hash_tables.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/synchronization/lock.h"
-#include "cc/base/cc_export.h"
-#include "cc/prioritized_resource.h"
-#include "cc/priority_calculator.h"
-#include "cc/resource.h"
-#include "cc/trees/proxy.h"
-#include "third_party/khronos/GLES2/gl2.h"
-#include "ui/gfx/size.h"
-
-#if defined(COMPILER_GCC)
-namespace BASE_HASH_NAMESPACE {
-template<>
-struct hash<cc::PrioritizedResource*> {
-  size_t operator()(cc::PrioritizedResource* ptr) const {
-    return hash<size_t>()(reinterpret_cast<size_t>(ptr));
-  }
-};
-} // namespace BASE_HASH_NAMESPACE
-#endif // COMPILER
-
-namespace cc {
-
-class PriorityCalculator;
-class Proxy;
-
-class CC_EXPORT PrioritizedResourceManager {
-public:
-    static scoped_ptr<PrioritizedResourceManager> create(const Proxy* proxy)
-    {
-        return make_scoped_ptr(new PrioritizedResourceManager(proxy));
-    }
-    scoped_ptr<PrioritizedResource> createTexture(gfx::Size size, GLenum format)
-    {
-        return make_scoped_ptr(new PrioritizedResource(this, size, format));
-    }
-    ~PrioritizedResourceManager();
-
-    typedef std::list<PrioritizedResource::Backing*> BackingList;
-
-    // FIXME (http://crbug.com/137094): This 64MB default is a straggler from the
-    // old texture manager and is just to give us a default memory allocation before
-    // we get a callback from the GPU memory manager. We should probaby either:
-    // - wait for the callback before rendering anything instead
-    // - push this into the GPU memory manager somehow.
-    static size_t defaultMemoryAllocationLimit() { return 64 * 1024 * 1024; }
-
-    // memoryUseBytes() describes the number of bytes used by existing allocated textures.
-    // memoryAboveCutoffBytes() describes the number of bytes that would be used if all
-    // textures that are above the cutoff were allocated.
-    // memoryUseBytes() <= memoryAboveCutoffBytes() should always be true.
-    size_t memoryUseBytes() const { return m_memoryUseBytes; }
-    size_t memoryAboveCutoffBytes() const { return m_memoryAboveCutoffBytes; }
-    size_t memoryForSelfManagedTextures() const { return m_maxMemoryLimitBytes - m_memoryAvailableBytes; }
-
-    void setMaxMemoryLimitBytes(size_t bytes) { m_maxMemoryLimitBytes = bytes; }
-    size_t maxMemoryLimitBytes() const { return m_maxMemoryLimitBytes; }
-
-    // Sepecify a external priority cutoff. Only textures that have a strictly higher priority
-    // than this cutoff will be allowed.
-    void setExternalPriorityCutoff(int priorityCutoff) { m_externalPriorityCutoff = priorityCutoff; }
-
-    // Return the amount of texture memory required at particular cutoffs.
-    size_t memoryVisibleBytes() const;
-    size_t memoryVisibleAndNearbyBytes() const;
-
-    void prioritizeTextures();
-    void clearPriorities();
-
-    // 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. Returns true if resources are
-    // indeed evicted as a result of this call.
-    bool reduceMemoryOnImplThread(size_t limitBytes, int priorityCutoff, ResourceProvider*);
-
-    // Delete contents textures' backing resources that can be recycled. This
-    // may be called on the impl thread while the main thread is running.
-    void reduceWastedMemoryOnImplThread(ResourceProvider*);
-
-    // Returns true if there exist any textures that are linked to backings that have had their
-    // resources evicted. Only when we commit a tree that has no textures linked to evicted backings
-    // may we allow drawing. After an eviction, this will not become true until
-    // unlinkAndClearEvictedBackings is called.
-    bool linkedEvictedBackingsExist() const;
-
-    // Unlink the list of contents textures' backings from their owning textures and delete the evicted
-    // backings' structures. This is called just before updating layers, and is only ever called on the
-    // main thread.
-    void unlinkAndClearEvictedBackings();
-
-    bool requestLate(PrioritizedResource*);
-
-    void reduceWastedMemory(ResourceProvider*);
-    void reduceMemory(ResourceProvider*);
-    void clearAllMemory(ResourceProvider*);
-
-    void acquireBackingTextureIfNeeded(PrioritizedResource*, ResourceProvider*);
-
-    void registerTexture(PrioritizedResource*);
-    void unregisterTexture(PrioritizedResource*);
-    void returnBackingTexture(PrioritizedResource*);
-
-    // Update all backings' priorities from their owning texture.
-    void pushTexturePrioritiesToBackings();
-
-    // Mark all textures' backings as being in the drawing impl tree.
-    void updateBackingsInDrawingImplTree();
-
-    const Proxy* proxyForDebug() const;
-
-private:
-    friend class PrioritizedResourceTest;
-
-    enum EvictionPolicy {
-        EvictOnlyRecyclable,
-        EvictAnything,
-    };
-    enum UnlinkPolicy {
-        DoNotUnlinkBackings,
-        UnlinkBackings,
-    };
-
-    // Compare textures. Highest priority first.
-    static inline bool compareTextures(PrioritizedResource* a, PrioritizedResource* b)
-    {
-        if (a->requestPriority() == b->requestPriority())
-            return a < b;
-        return PriorityCalculator::priority_is_higher(a->requestPriority(), b->requestPriority());
-    }
-    // Compare backings. Lowest priority first.
-    static inline bool compareBackings(PrioritizedResource::Backing* a, PrioritizedResource::Backing* b)
-    {
-        // Make textures that can be recycled appear first
-        if (a->canBeRecycled() != b->canBeRecycled())
-            return (a->canBeRecycled() > b->canBeRecycled());
-        // Then sort by being above or below the priority cutoff.
-        if (a->wasAbovePriorityCutoffAtLastPriorityUpdate() != b->wasAbovePriorityCutoffAtLastPriorityUpdate())
-            return (a->wasAbovePriorityCutoffAtLastPriorityUpdate() < b->wasAbovePriorityCutoffAtLastPriorityUpdate());
-        // Then sort by priority (note that backings that no longer have owners will
-        // always have the lowest priority)
-        if (a->requestPriorityAtLastPriorityUpdate() != b->requestPriorityAtLastPriorityUpdate())
-            return PriorityCalculator::priority_is_lower(a->requestPriorityAtLastPriorityUpdate(), b->requestPriorityAtLastPriorityUpdate());
-        // Finally sort by being in the impl tree versus being completely unreferenced
-        if (a->inDrawingImplTree() != b->inDrawingImplTree())
-            return (a->inDrawingImplTree() < b->inDrawingImplTree());
-        return a < b;
-    }
-
-    PrioritizedResourceManager(const Proxy* proxy);
-
-    bool evictBackingsToReduceMemory(size_t limitBytes,
-                                     int priorityCutoff,
-                                     EvictionPolicy,
-                                     UnlinkPolicy,
-                                     ResourceProvider*);
-    PrioritizedResource::Backing* createBacking(gfx::Size, GLenum format, ResourceProvider*);
-    void evictFirstBackingResource(ResourceProvider*);
-    void sortBackings();
-
-    void assertInvariants();
-
-    size_t m_maxMemoryLimitBytes;
-    // The priority cutoff based on memory pressure. This is not a strict
-    // cutoff -- requestLate allows textures with priority equal to this
-    // cutoff to be allowed.
-    int m_priorityCutoff;
-    // The priority cutoff based on external memory policy. This is a strict
-    // cutoff -- no textures with priority equal to this cutoff will be allowed.
-    int m_externalPriorityCutoff;
-    size_t m_memoryUseBytes;
-    size_t m_memoryAboveCutoffBytes;
-    size_t m_memoryAvailableBytes;
-
-    typedef base::hash_set<PrioritizedResource*> TextureSet;
-    typedef std::vector<PrioritizedResource*> TextureVector;
-
-    const Proxy* m_proxy;
-
-    TextureSet m_textures;
-    // This list is always sorted in eviction order, with the exception the
-    // newly-allocated or recycled textures at the very end of the tail that 
-    // are not sorted by priority.
-    BackingList m_backings;
-    bool m_backingsTailNotSorted;
-
-    // The list of backings that have been evicted, but may still be linked
-    // to textures. This can be accessed concurrently by the main and impl
-    // threads, and may only be accessed while holding m_evictedBackingsLock.
-    mutable base::Lock m_evictedBackingsLock;
-    BackingList m_evictedBackings;
-
-    TextureVector m_tempTextureVector;
-
-    // Statistics about memory usage at priority cutoffs, computed at prioritizeTextures.
-    size_t m_memoryVisibleBytes;
-    size_t m_memoryVisibleAndNearbyBytes;
-
-    // Statistics copied at the time of pushTexturePrioritiesToBackings.
-    size_t m_memoryVisibleLastPushedBytes;
-    size_t m_memoryVisibleAndNearbyLastPushedBytes;
-
-    DISALLOW_COPY_AND_ASSIGN(PrioritizedResourceManager);
-};
-
-}  // namespace cc
-
-#endif  // CC_PRIORITIZED_RESOURCE_MANAGER_H_