skia: Add support for CHROMIUM_image backed textures.

tests/ResourceCacheTest.cpp

Index: tests/ResourceCacheTest.cpp
diff --git a/tests/ResourceCacheTest.cpp b/tests/ResourceCacheTest.cpp
index ee8d7c7eea7bbe39cdba373b7e9fa1d42b75c4fd..f9ba18fcdd79680fd71a5422f16c07b0bf36aec4 100644
--- a/tests/ResourceCacheTest.cpp
+++ b/tests/ResourceCacheTest.cpp
@@ -250,7 +250,8 @@ public:
         : INHERITED(gpu, lifeCycle)
         , fToDelete(nullptr)
         , fSize(size)
-        , fProperty(kA_SimulatedProperty) {
+        , fProperty(kA_SimulatedProperty)
+        , fReuseable(true) {
         ++fNumAlive;
         this->registerWithCache();
     }
@@ -259,7 +260,8 @@ public:
         : INHERITED(gpu, lifeCycle)
         , fToDelete(nullptr)
         , fSize(kDefaultSize)
-        , fProperty(kA_SimulatedProperty) {
+        , fProperty(kA_SimulatedProperty)
+        , fReuseable(true) {
         ++fNumAlive;
         this->registerWithCache();
     }
@@ -268,13 +270,15 @@ public:
         : INHERITED(gpu, kCached_LifeCycle)
         , fToDelete(nullptr)
         , fSize(kDefaultSize)
-        , fProperty(kA_SimulatedProperty) {
+        , fProperty(kA_SimulatedProperty)
+        , fReuseable(true) {
         ++fNumAlive;
         this->registerWithCache();
     }
 
-    static TestResource* CreateScratch(GrGpu* gpu, SimulatedProperty property, bool cached = true) {
-        return new TestResource(gpu, property, cached, kScratchConstructor);
+    static TestResource* CreateScratch(GrGpu* gpu, SimulatedProperty property, bool cached = true,
+                                       bool reuseable = true) {
+        return new TestResource(gpu, property, cached, kScratchConstructor, reuseable);
     }
 
     ~TestResource() {
@@ -308,11 +312,13 @@ public:
 private:
     static const int kScratchKeyFieldCnt = 6;
 
-    TestResource(GrGpu* gpu, SimulatedProperty property, bool cached, ScratchConstructor)
+    TestResource(GrGpu* gpu, SimulatedProperty property, bool cached, ScratchConstructor,
+                 bool reuseable)
         : INHERITED(gpu, cached ? kCached_LifeCycle : kUncached_LifeCycle)
         , fToDelete(nullptr)
         , fSize(kDefaultSize)
-        , fProperty(property) {
+        , fProperty(property)
+        , fReuseable(reuseable) {
         GrScratchKey scratchKey;
         ComputeScratchKey(fProperty, &scratchKey);
         this->setScratchKey(scratchKey);
@@ -321,11 +327,13 @@ private:
     }
 
     size_t onGpuMemorySize() const override { return fSize; }
+    bool reuseable() const override { return fReuseable; }
 
     TestResource* fToDelete;
     size_t fSize;
     static int fNumAlive;
     SimulatedProperty fProperty;
+    bool fReuseable;
     typedef GrGpuResource INHERITED;
 };
 int TestResource::fNumAlive = 0;
@@ -1188,6 +1196,23 @@ static void test_flush(skiatest::Reporter* reporter) {
     REPORTER_ASSERT(reporter, 0 == cache->getResourceCount());
 }
 
+static void test_reuseable_resources(skiatest::Reporter* reporter) {
+    Mock mock(1000, 1000);
+    GrContext* context = mock.context();
+    TestResource* scratch = TestResource::CreateScratch(context->getGpu(),
+            TestResource::kB_SimulatedProperty, true, true);
+    scratch->unref();
+    REPORTER_ASSERT(reporter, TestResource::NumAlive() == 1);
+    scratch = TestResource::CreateScratch(context->getGpu(),
+            TestResource::kB_SimulatedProperty, false, true);
+    scratch->unref();
+    REPORTER_ASSERT(reporter, TestResource::NumAlive() == 2);
+    scratch = TestResource::CreateScratch(context->getGpu(),
+            TestResource::kB_SimulatedProperty, false, false);
+    scratch->unref();
+    REPORTER_ASSERT(reporter, TestResource::NumAlive() == 2);
+}
+
 static void test_large_resource_count(skiatest::Reporter* reporter) {
     // Set the cache size to double the resource count because we're going to create 2x that number
     // resources, using two different key domains. Add a little slop to the bytes because we resize
@@ -1309,6 +1334,7 @@ DEF_GPUTEST(ResourceCacheMisc, reporter, factory) {
     test_resource_size_changed(reporter);
     test_timestamp_wrap(reporter);
     test_flush(reporter);
+    test_reuseable_resources(reporter);
     test_large_resource_count(reporter);
     test_custom_data(reporter);
     test_abandoned(reporter);