Remove GrTexture::releaseRenderTarget() and add GrSurface::isSameAs().

tests/GrSurfaceTest.cpp

Index: tests/GrSurfaceTest.cpp
===================================================================
--- tests/GrSurfaceTest.cpp	(revision 0)
+++ tests/GrSurfaceTest.cpp	(revision 0)
@@ -0,0 +1,68 @@
+
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+// This is a GPU-backend specific test.
+
+#include "SkTypes.h"
+
+#if SK_SUPPORT_GPU
+
+#include "Test.h"
+#include "GrContext.h"
+#include "GrContextFactory.h"
+#include "GrRenderTarget.h"
+#include "GrTexture.h"
+
+static void GrSurfaceIsSameTest(skiatest::Reporter* reporter, GrContextFactory* factory) {
+    GrContext* context = factory->get(GrContextFactory::kNull_GLContextType);
+    if (NULL != context) {
+        GrTextureDesc desc;
+        desc.fConfig = kSkia8888_GrPixelConfig;
+        desc.fFlags = kRenderTarget_GrTextureFlagBit;
+        desc.fWidth = 256;
+        desc.fHeight = 256;
+        desc.fSampleCnt = 0;
+        GrSurface* texRT1 = context->createUncachedTexture(desc, NULL, 0);
+        GrSurface* texRT2 = context->createUncachedTexture(desc, NULL, 0);
+        desc.fFlags = kNone_GrTextureFlags;
+        GrSurface* tex1 = context->createUncachedTexture(desc, NULL, 0);
+
+        REPORTER_ASSERT(reporter, texRT1->isSameAs(texRT1));
+        REPORTER_ASSERT(reporter, texRT1->isSameAs(texRT1->asRenderTarget()));
+        REPORTER_ASSERT(reporter, texRT1->asRenderTarget()->isSameAs(texRT1));
+        REPORTER_ASSERT(reporter, !texRT2->isSameAs(texRT1));
+        REPORTER_ASSERT(reporter, !texRT2->asRenderTarget()->isSameAs(texRT1));
+        REPORTER_ASSERT(reporter, !texRT2->isSameAs(texRT1->asRenderTarget()));
+        REPORTER_ASSERT(reporter, !texRT2->isSameAs(tex1));
+        REPORTER_ASSERT(reporter, !texRT2->asRenderTarget()->isSameAs(tex1));
+
+        GrBackendTextureDesc backendDesc;
+        backendDesc.fConfig = kSkia8888_GrPixelConfig;
+        backendDesc.fFlags = kRenderTarget_GrBackendTextureFlag;
+        backendDesc.fWidth = 256;
+        backendDesc.fHeight = 256;
+        backendDesc.fSampleCnt = 0;
+        backendDesc.fTextureHandle = 5;
+        GrSurface* externalTexRT = context->wrapBackendTexture(backendDesc);
+        REPORTER_ASSERT(reporter, externalTexRT->isSameAs(externalTexRT));
+        REPORTER_ASSERT(reporter, externalTexRT->isSameAs(externalTexRT->asRenderTarget()));
+        REPORTER_ASSERT(reporter, externalTexRT->asRenderTarget()->isSameAs(externalTexRT));
+        REPORTER_ASSERT(reporter, !externalTexRT->isSameAs(texRT1));
+        REPORTER_ASSERT(reporter, !externalTexRT->asRenderTarget()->isSameAs(texRT1));
+
+        texRT1->unref();
+        texRT2->unref();
+        tex1->unref();
+        externalTexRT->unref();
+    }
+}
+
+#include "TestClassDef.h"
+DEFINE_GPUTESTCLASS("GrSurfaceIsSame", GrSurfaceIsSameTestClass, GrSurfaceIsSameTest)
+
+#endif