From 5756aff40921e700dc40f2a1757291a64acddeaa Mon Sep 17 00:00:00 2001
From: junov <junov@chromium.org>
Date: Thu, 11 Dec 2014 14:59:31 -0800
Subject: [PATCH] Adding a custom data field to GrGpuResource

Motivation: allow Blink to track pre-existing mailbox names for
textures that are recycled by the ganesh scratch texture pool.

BUG=440462
TBR=bsalomon@google.com

Review URL: https://codereview.chromium.org/796163002
---
 include/gpu/GrGpuResource.h | 17 +++++++++++++++++
 src/gpu/GrGpuResource.cpp   |  6 ++++++
 2 files changed, 23 insertions(+)

diff --git a/include/gpu/GrGpuResource.h b/include/gpu/GrGpuResource.h
index 4670d91..338e161 100644
--- a/include/gpu/GrGpuResource.h
+++ b/include/gpu/GrGpuResource.h
@@ -10,6 +10,7 @@
 
 #include "GrResourceKey.h"
 #include "GrTypesPriv.h"
+#include "SkData.h"
 #include "SkInstCnt.h"
 #include "SkTInternalLList.h"
 
@@ -168,6 +169,20 @@ public:
     uint32_t getUniqueID() const { return fUniqueID; }
 
     /**
+     * Attach a custom data object to this resource. The data will remain attached
+     * for the lifetime of this resource (until it is abandoned or released).
+     * Takes a ref on data. Previously attached data, if any, is unrefed.
+     * Returns the data argument, for convenience.
+     */
+    const SkData* setCustomData(const SkData* data);
+
+    /**
+     * Returns the custom data object that was attached to this resource by
+     * calling setCustomData.
+     */
+    const SkData* getCustomData() const { return fData.get(); }
+
+    /**
      * Internal-only helper class used for cache manipulations of the reosurce.
      */
     class CacheAccess;
@@ -272,6 +287,8 @@ private:
     uint32_t                fFlags;
     const uint32_t          fUniqueID;
 
+    SkAutoTUnref<const SkData> fData;
+
     typedef GrIORef<GrGpuResource> INHERITED;
     friend class GrIORef<GrGpuResource>; // to access notifyIsPurgable.
 };
diff --git a/src/gpu/GrGpuResource.cpp b/src/gpu/GrGpuResource.cpp
index cc24335..2a5718a 100644
--- a/src/gpu/GrGpuResource.cpp
+++ b/src/gpu/GrGpuResource.cpp
@@ -56,6 +56,12 @@ void GrGpuResource::abandon() {
     fGpuMemorySize = 0;
 }
 
+const SkData* GrGpuResource::setCustomData(const SkData* data) {
+    SkSafeRef(data);
+    fData.reset(data);
+    return data;
+}
+
 const GrContext* GrGpuResource::getContext() const {
     if (fGpu) {
         return fGpu->getContext();
-- 
2.7.4