commit 4a01ac9e410e7b78fb04c8632e0676082b9408aa
author Florin Malita <fmalita@chromium.org> Mon Mar 13 16:45:28 2017 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> Tue Mar 14 14:00:13 2017 +0000
tree 6a834475439e681020026500b3c7f6c13cb7bfef
parent b66b42f1749a7a23fd610d90605978537bf4fbb7

Purge GrTextBlobCache entries on SkTextBlob deletion

Similar to the SkImage purge mechanism.

Change-Id: I0b7fb1bad507a3c7f30a4f7514bedd894d1748ac
Reviewed-on: https://skia-review.googlesource.com/9631
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Florin Malita <fmalita@chromium.org>

include/core/SkTextBlob.h

diff --git a/include/core/SkTextBlob.h b/include/core/SkTextBlob.h
index 1d17f4d..956c6a0 100644
--- a/include/core/SkTextBlob.h
+++ b/include/core/SkTextBlob.h
@@ -9,6 +9,7 @@
 #define SkTextBlob_DEFINED
 
 #include "../private/SkTemplates.h"
+#include "../private/SkAtomics.h"
 #include "SkPaint.h"
 #include "SkString.h"
 #include "SkRefCnt.h"
@@ -75,11 +76,19 @@
 
     static unsigned ScalarsPerGlyph(GlyphPositioning pos);
 
+    // Call when this blob is part of the key to a cache entry. This allows the cache
+    // to know automatically those entries can be purged when this SkTextBlob is deleted.
+    void notifyAddedToCache() const {
+        fAddedToCache.store(true);
+    }
+
+    friend class GrTextBlobCache;
     friend class SkTextBlobBuilder;
     friend class SkTextBlobRunIterator;
 
-    const SkRect   fBounds;
-    const uint32_t fUniqueID;
+    const SkRect           fBounds;
+    const uint32_t         fUniqueID;
+    mutable SkAtomic<bool> fAddedToCache;
 
     SkDEBUGCODE(size_t fStorageSize;)