1 files changed, 272 insertions, 0 deletions
diff --git a/cc/resource_provider.h b/cc/resource_provider.h
index 638cbb2..f515c11 100644
--- a/cc/resource_provider.h
+++ b/cc/resource_provider.h
@@ -1,3 +1,275 @@
 // 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 CCResourceProvider_h
+#define CCResourceProvider_h
+
+#include "base/basictypes.h"
+#include "CCGraphicsContext.h"
+#include "GraphicsContext3D.h"
+#include "IntSize.h"
+#include "SkBitmap.h"
+#include "SkCanvas.h"
+#include "TextureCopier.h"
+#include <wtf/Deque.h>
+#include <wtf/HashMap.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/PassOwnPtr.h>
+#include <wtf/PassRefPtr.h>
+#include <wtf/RefPtr.h>
+#include <wtf/Vector.h>
+
+namespace WebKit {
+class WebGraphicsContext3D;
+}
+
+namespace cc {
+
+class IntRect;
+class LayerTextureSubImage;
+class TextureCopier;
+class TextureUploader;
+
+// Thread-safety notes: this class is not thread-safe and can only be called
+// from the thread it was created on (in practice, the compositor thread).
+class CCResourceProvider {
+public:
+    typedef unsigned ResourceId;
+    typedef Vector<ResourceId> ResourceIdArray;
+    typedef HashMap<ResourceId, ResourceId> ResourceIdMap;
+    enum TextureUsageHint { TextureUsageAny, TextureUsageFramebuffer };
+    enum ResourceType {
+        GLTexture = 1,
+        Bitmap,
+    };
+    struct Mailbox {
+        GC3Dbyte name[64];
+    };
+    struct TransferableResource {
+        unsigned id;
+        GC3Denum format;
+        IntSize size;
+        Mailbox mailbox;
+    };
+    typedef Vector<TransferableResource> TransferableResourceArray;
+    struct TransferableResourceList {
+        TransferableResourceList();
+        ~TransferableResourceList();
+
+        TransferableResourceArray resources;
+        unsigned syncPoint;
+    };
+
+    static PassOwnPtr<CCResourceProvider> create(CCGraphicsContext*);
+
+    virtual ~CCResourceProvider();
+
+    WebKit::WebGraphicsContext3D* graphicsContext3D();
+    TextureUploader* textureUploader() const { return m_textureUploader.get(); }
+    TextureCopier* textureCopier() const { return m_textureCopier.get(); }
+    int maxTextureSize() const { return m_maxTextureSize; }
+    unsigned numResources() const { return m_resources.size(); }
+
+    // Checks whether a resource is in use by a consumer.
+    bool inUseByConsumer(ResourceId);
+
+
+    // Producer interface.
+
+    void setDefaultResourceType(ResourceType type) { m_defaultResourceType = type; }
+    ResourceType defaultResourceType() const { return m_defaultResourceType; }
+    ResourceType resourceType(ResourceId);
+
+    // Creates a resource of the default resource type.
+    ResourceId createResource(int pool, const IntSize&, GC3Denum format, TextureUsageHint);
+
+    // You can also explicitly create a specific resource type.
+    ResourceId createGLTexture(int pool, const IntSize&, GC3Denum format, TextureUsageHint);
+    ResourceId createBitmap(int pool, const IntSize&);
+    // Wraps an external texture into a GL resource.
+    ResourceId createResourceFromExternalTexture(unsigned textureId);
+
+    void deleteResource(ResourceId);
+
+    // Deletes all resources owned by a given pool.
+    void deleteOwnedResources(int pool);
+
+    // Upload data from image, copying sourceRect (in image) into destRect (in the resource).
+    void upload(ResourceId, const uint8_t* image, const IntRect& imageRect, const IntRect& sourceRect, const IntSize& destOffset);
+
+    // Flush all context operations, kicking uploads and ensuring ordering with
+    // respect to other contexts.
+    void flush();
+
+    // Only flush the command buffer if supported.
+    // Returns true if the shallow flush occurred, false otherwise.
+    bool shallowFlushIfSupported();
+
+    // Creates accounting for a child, and associate it with a pool. Resources
+    // transfered from that child will go to that pool. Returns a child ID.
+    int createChild(int pool);
+
+    // Destroys accounting for the child, deleting all resources from that pool.
+    void destroyChild(int child);
+
+    // Gets the child->parent resource ID map.
+    const ResourceIdMap& getChildToParentMap(int child) const;
+
+    // Prepares resources to be transfered to the parent, moving them to
+    // mailboxes and serializing meta-data into TransferableResources.
+    // Resources are not removed from the CCResourceProvider, but are markes as
+    // "in use".
+    TransferableResourceList prepareSendToParent(const ResourceIdArray&);
+
+    // Prepares resources to be transfered back to the child, moving them to
+    // mailboxes and serializing meta-data into TransferableResources.
+    // Resources are removed from the CCResourceProvider. Note: the resource IDs
+    // passed are in the parent namespace and will be translated to the child
+    // namespace when returned.
+    TransferableResourceList prepareSendToChild(int child, const ResourceIdArray&);
+
+    // Receives resources from a child, moving them from mailboxes. Resource IDs
+    // passed are in the child namespace, and will be translated to the parent
+    // namespace, added to the child->parent map.
+    // NOTE: if the syncPoint filed in TransferableResourceList is set, this
+    // will wait on it.
+    void receiveFromChild(int child, const TransferableResourceList&);
+
+    // Receives resources from the parent, moving them from mailboxes. Resource IDs
+    // passed are in the child namespace.
+    // NOTE: if the syncPoint filed in TransferableResourceList is set, this
+    // will wait on it.
+    void receiveFromParent(const TransferableResourceList&);
+
+    // Only for testing
+    size_t mailboxCount() const { return m_mailboxes.size(); }
+
+    // The following lock classes are part of the CCResourceProvider API and are
+    // needed to read and write the resource contents. The user must ensure
+    // that they only use GL locks on GL resources, etc, and this is enforced
+    // by assertions.
+    class ScopedReadLockGL {
+    public:
+        ScopedReadLockGL(CCResourceProvider*, CCResourceProvider::ResourceId);
+        ~ScopedReadLockGL();
+
+        unsigned textureId() const { return m_textureId; }
+
+    private:
+        CCResourceProvider* m_resourceProvider;
+        CCResourceProvider::ResourceId m_resourceId;
+        unsigned m_textureId;
+
+        DISALLOW_COPY_AND_ASSIGN(ScopedReadLockGL);
+    };
+
+    class ScopedWriteLockGL {
+    public:
+        ScopedWriteLockGL(CCResourceProvider*, CCResourceProvider::ResourceId);
+        ~ScopedWriteLockGL();
+
+        unsigned textureId() const { return m_textureId; }
+
+    private:
+        CCResourceProvider* m_resourceProvider;
+        CCResourceProvider::ResourceId m_resourceId;
+        unsigned m_textureId;
+
+        DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockGL);
+    };
+
+    class ScopedReadLockSoftware {
+    public:
+        ScopedReadLockSoftware(CCResourceProvider*, CCResourceProvider::ResourceId);
+        ~ScopedReadLockSoftware();
+
+        const SkBitmap* skBitmap() const { return &m_skBitmap; }
+
+    private:
+        CCResourceProvider* m_resourceProvider;
+        CCResourceProvider::ResourceId m_resourceId;
+        SkBitmap m_skBitmap;
+
+        DISALLOW_COPY_AND_ASSIGN(ScopedReadLockSoftware);
+    };
+
+    class ScopedWriteLockSoftware {
+    public:
+        ScopedWriteLockSoftware(CCResourceProvider*, CCResourceProvider::ResourceId);
+        ~ScopedWriteLockSoftware();
+
+        SkCanvas* skCanvas() { return m_skCanvas.get(); }
+
+    private:
+        CCResourceProvider* m_resourceProvider;
+        CCResourceProvider::ResourceId m_resourceId;
+        SkBitmap m_skBitmap;
+        OwnPtr<SkCanvas> m_skCanvas;
+
+        DISALLOW_COPY_AND_ASSIGN(ScopedWriteLockSoftware);
+    };
+
+private:
+    struct Resource {
+        Resource();
+        Resource(unsigned textureId, int pool, const IntSize& size, GC3Denum format);
+        Resource(uint8_t* pixels, int pool, const IntSize& size, GC3Denum format);
+
+        unsigned glId;
+        uint8_t* pixels;
+        int pool;
+        int lockForReadCount;
+        bool lockedForWrite;
+        bool external;
+        bool exported;
+        IntSize size;
+        GC3Denum format;
+        ResourceType type;
+    };
+    typedef HashMap<ResourceId, Resource> ResourceMap;
+    struct Child {
+        Child();
+        ~Child();
+
+        int pool;
+        ResourceIdMap childToParentMap;
+        ResourceIdMap parentToChildMap;
+    };
+    typedef HashMap<int, Child> ChildMap;
+
+    explicit CCResourceProvider(CCGraphicsContext*);
+    bool initialize();
+
+    const Resource* lockForRead(ResourceId);
+    void unlockForRead(ResourceId);
+    const Resource* lockForWrite(ResourceId);
+    void unlockForWrite(ResourceId);
+    static void populateSkBitmapWithResource(SkBitmap*, const Resource*);
+
+    bool transferResource(WebKit::WebGraphicsContext3D*, ResourceId, TransferableResource*);
+    void trimMailboxDeque();
+
+    CCGraphicsContext* m_context;
+    ResourceId m_nextId;
+    ResourceMap m_resources;
+    int m_nextChild;
+    ChildMap m_children;
+
+    Deque<Mailbox> m_mailboxes;
+
+    ResourceType m_defaultResourceType;
+    bool m_useTextureStorageExt;
+    bool m_useTextureUsageHint;
+    bool m_useShallowFlush;
+    OwnPtr<LayerTextureSubImage> m_texSubImage;
+    OwnPtr<TextureUploader> m_textureUploader;
+    OwnPtr<AcceleratedTextureCopier> m_textureCopier;
+    int m_maxTextureSize;
+
+    DISALLOW_COPY_AND_ASSIGN(CCResourceProvider);
+};
+
+}
+
+#endif