Refactor GrBufferAllocPools to use resource cache

src/gpu/GrResourceProvider.cpp

Index: src/gpu/GrResourceProvider.cpp
diff --git a/src/gpu/GrResourceProvider.cpp b/src/gpu/GrResourceProvider.cpp
index 8fc3272ae2204715650cd45e664b5d56a1ff1399..e5f1d9cd0b4c4b842a5360e8aa77f4d00e382909 100644
--- a/src/gpu/GrResourceProvider.cpp
+++ b/src/gpu/GrResourceProvider.cpp
@@ -26,7 +26,7 @@ const GrIndexBuffer* GrResourceProvider::createInstancedIndexBuffer(const uint16
                                                                     const GrUniqueKey& key) {
     size_t bufferSize = patternSize * reps * sizeof(uint16_t);
 
-    GrIndexBuffer* buffer = this->gpu()->createIndexBuffer(bufferSize, /* dynamic = */ false);
+    GrIndexBuffer* buffer = this->getIndexBuffer(bufferSize, /* dynamic = */ false, true);
     if (!buffer) {
         return NULL;
     }
@@ -63,3 +63,58 @@ const GrIndexBuffer* GrResourceProvider::createQuadIndexBuffer() {
     return this->createInstancedIndexBuffer(kPattern, 6, kMaxQuads, 4, fQuadIndexBufferKey);
 }
 
+GrIndexBuffer* GrResourceProvider::getIndexBuffer(size_t size, bool dynamic,
+                                                  bool calledDuringFlush) {
+    if (this->isAbandoned()) {
+        return NULL;
+    }
+
+    if (dynamic) {
+        // bin by pow2 with a reasonable min
+        static const size_t MIN_SIZE = 1 << 12;
+        size = SkTMax(MIN_SIZE, GrNextPow2(size));
+
+        GrScratchKey key;
+        GrIndexBuffer::ComputeScratchKey(size, dynamic, &key);
+        uint32_t scratchFlags = 0;
+        if (calledDuringFlush) {
+            scratchFlags = GrResourceCache::kRequireNoPendingIO_ScratchFlag;
+        } else {
+            scratchFlags = GrResourceCache::kPreferNoPendingIO_ScratchFlag;
+        }
+        GrGpuResource* resource = this->cache()->findAndRefScratchResource(key, scratchFlags);
+        if (resource) {
+            return static_cast<GrIndexBuffer*>(resource);
+        }
+    }
+
+    return this->gpu()->createIndexBuffer(size, dynamic);    
+}
+
+GrVertexBuffer* GrResourceProvider::getVertexBuffer(size_t size, bool dynamic, 
+                                                    bool calledDuringFlush) {
+    if (this->isAbandoned()) {
+        return NULL;
+    }
+
+    if (dynamic) {
+        // bin by pow2 with a reasonable min
+        static const size_t MIN_SIZE = 1 << 15;
+        size = SkTMax(MIN_SIZE, GrNextPow2(size));
+
+        GrScratchKey key;
+        GrVertexBuffer::ComputeScratchKey(size, dynamic, &key);
+        uint32_t scratchFlags = 0;
+        if (calledDuringFlush) {
+            scratchFlags = GrResourceCache::kRequireNoPendingIO_ScratchFlag;
+        } else {
+            scratchFlags = GrResourceCache::kPreferNoPendingIO_ScratchFlag;
+        }
+        GrGpuResource* resource = this->cache()->findAndRefScratchResource(key, scratchFlags);
+        if (resource) {
+            return static_cast<GrVertexBuffer*>(resource);
+        }
+    }
+
+    return this->gpu()->createVertexBuffer(size, dynamic);
+}