CL for perf tryjob on mac

third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h

Index: third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h
diff --git a/third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h b/third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h
index d2dfc7e4d1f51a056f33e4b19e32b428bdb8f981..364381f87f78e7cef401835bac83c52228c55c14 100644
--- a/third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h
+++ b/third_party/WebKit/Source/platform/graphics/Canvas2DLayerBridge.h
@@ -40,6 +40,7 @@
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
+#include "wtf/Vector.h"
 #include "wtf/WeakPtr.h"
 
 class SkPictureRecorder;
@@ -126,6 +127,35 @@ public:
     void setLoggerForTesting(PassOwnPtr<Logger>);
 
 private:
+    // All information associated with a CHROMIUM image.
+    struct ImageInfo {
+        ImageInfo() {}
+        ImageInfo(GLuint imageId, GLuint textureId);
+
+        // Whether this structure holds references to a CHROMIUM image.
+        bool empty();
+
+        // The id of the CHROMIUM image.
+        GLuint m_imageId = 0;
+
+        // The id of the texture bound to the CHROMIUM image.
+        GLuint m_textureId = 0;
+    };
+
+    struct MailboxInfo {
+        DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
+        WebExternalTextureMailbox m_mailbox;
+        RefPtr<SkImage> m_image;
+        RefPtr<Canvas2DLayerBridge> m_parentLayerBridge;
+
+        // If this mailbox wraps an IOSurface-backed texture, the ids of the
+        // CHROMIUM image and the texture.
+        ImageInfo m_imageInfo;
+
+        MailboxInfo(const MailboxInfo&);
+        MailboxInfo() {}
+    };
+
     Canvas2DLayerBridge(PassOwnPtr<WebGraphicsContext3DProvider>, const IntSize&, int msaaSampleCount, OpacityMode, AccelerationMode);
     WebGraphicsContext3D* context();
     void startRecording();
@@ -141,6 +171,36 @@ private:
     SkSurface* getOrCreateSurface(AccelerationHint = PreferAcceleration);
     bool shouldAccelerate(AccelerationHint) const;
 
+    // Returns the GL filter associated with |m_filterQuality|.
+    GLenum getGLFilter();
+
+    // Creates an IOSurface-backed texture. Copies |image| into the texture.
+    // Prepares a mailbox from the texture. Stores all information in a newly
+    // created MailboxInfo, which resides in |m_mailboxes|. Returns whether the
+    // mailbox was successfully prepared. |mailbox| is an out parameter only
+    // populated on success.
+    bool prepareIOSurfaceMailboxFromImage(RefPtr<SkImage>, WebExternalTextureMailbox*);
+
+    // Creates an IOSurface-backed texture. Returns an ImageInfo, which is empty
+    // on failure. The caller takes ownership of both the texture and the image.
+    ImageInfo createIOSurfaceBackedTexture();
+
+    // Prepends a new MailboxInfo object to |m_mailboxes|, and returns a
+    // reference. The reference is no longer valid after |m_mailboxes| is
+    // mutated.
+    MailboxInfo& createMailboxInfo();
+
+    // Returns whether the mailbox was successfully prepared from the SkImage.
+    // The mailbox is an out parameter only populated on success.
+    bool prepareMailboxFromImage(RefPtr<SkImage>, WebExternalTextureMailbox*);
+
+    // Resets Skia's texture bindings. This method should be called after
+    // changing texture bindings.
+    void resetSkiaTextureBinding();
+
+    // Releases all resources associated with a CHROMIUM image.
+    void deleteCHROMIUMImage(ImageInfo);
+
     OwnPtr<SkPictureRecorder> m_recorder;
     RefPtr<SkSurface> m_surface;
     RefPtr<SkImage> m_hibernationImage;
@@ -166,16 +226,6 @@ private:
 
     friend class Canvas2DLayerBridgeTest;
 
-    struct MailboxInfo {
-        DISALLOW_NEW_EXCEPT_PLACEMENT_NEW();
-        WebExternalTextureMailbox m_mailbox;
-        RefPtr<SkImage> m_image;
-        RefPtr<Canvas2DLayerBridge> m_parentLayerBridge;
-
-        MailboxInfo(const MailboxInfo&);
-        MailboxInfo() {}
-    };
-
     uint32_t m_lastImageId;
 
     enum {
@@ -188,8 +238,13 @@ private:
     GLenum m_lastFilter;
     AccelerationMode m_accelerationMode;
     OpacityMode m_opacityMode;
-    IntSize m_size;
+    const IntSize m_size;
     int m_recordingPixelCount;
+
+    // Each element in this vector represents an IOSurface backed texture that
+    // is ready to be reused.
+    // Elements in this vector can safely be purged in low memory conditions.
+    Vector<ImageInfo> m_imageInfoCache;
 };
 
 } // namespace blink