1 files changed, 100 insertions, 0 deletions
diff --git a/tests/RenderTargetContextTest.cpp b/tests/RenderTargetContextTest.cpp
new file mode 100644
index 0000000000..9a4b8747da
--- /dev/null
+++ b/tests/RenderTargetContextTest.cpp
@@ -0,0 +1,100 @@
+/*
+ * Copyright 2016 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 "Test.h"
+
+#if SK_SUPPORT_GPU
+#include "GrTextureProxy.h"
+#include "GrRenderTargetContext.h"
+
+static const int kSize = 64;
+
+static sk_sp<GrRenderTargetContext> get_rtc(GrContext* ctx, bool wrapped) {
+
+    if (wrapped) {
+        return ctx->makeRenderTargetContext(SkBackingFit::kExact,
+                                            kSize, kSize,
+                                            kRGBA_8888_GrPixelConfig, nullptr);
+    } else {
+        return ctx->makeDeferredRenderTargetContext(SkBackingFit::kExact,
+                                                    kSize, kSize,
+                                                    kRGBA_8888_GrPixelConfig, nullptr);
+    }
+}
+
+static void check_is_wrapped_status(skiatest::Reporter* reporter,
+                                    GrRenderTargetContext* rtCtx,
+                                    bool wrappedExpectation) {
+    REPORTER_ASSERT(reporter, rtCtx->isWrapped_ForTesting() == wrappedExpectation);
+
+    GrTextureProxy* tProxy = rtCtx->asDeferredTexture();
+    REPORTER_ASSERT(reporter, tProxy);
+
+    REPORTER_ASSERT(reporter, tProxy->isWrapped_ForTesting() == wrappedExpectation);
+}
+
+DEF_GPUTEST_FOR_RENDERING_CONTEXTS(RenderTargetContextTest, reporter, ctxInfo) {
+    GrContext* ctx = ctxInfo.grContext();
+
+    // A wrapped rtCtx's textureProxy is also wrapped
+    {
+        sk_sp<GrRenderTargetContext> rtCtx(get_rtc(ctx, true));
+        check_is_wrapped_status(reporter, rtCtx.get(), true);
+    }
+
+    // A deferred rtCtx's textureProxy is also deferred and GrRenderTargetContext::instantiate()
+    // swaps both from deferred to wrapped
+    {
+        sk_sp<GrRenderTargetContext> rtCtx(get_rtc(ctx, false));
+
+        check_is_wrapped_status(reporter, rtCtx.get(), false);
+
+        GrRenderTarget* rt = rtCtx->instantiate();
+        REPORTER_ASSERT(reporter, rt);
+
+        check_is_wrapped_status(reporter, rtCtx.get(), true);
+    }
+
+    // Calling instantiate on a GrRenderTargetContext's textureProxy also instantiates the
+    // GrRenderTargetContext
+    {
+        sk_sp<GrRenderTargetContext> rtCtx(get_rtc(ctx, false));
+
+        check_is_wrapped_status(reporter, rtCtx.get(), false);
+
+        GrTextureProxy* tProxy = rtCtx->asDeferredTexture();
+        REPORTER_ASSERT(reporter, tProxy);
+
+        GrTexture* tex = tProxy->instantiate(ctx->textureProvider());
+        REPORTER_ASSERT(reporter, tex);
+
+        check_is_wrapped_status(reporter, rtCtx.get(), true);
+    }
+
+    // readPixels switches a deferred rtCtx to wrapped
+    {
+        sk_sp<GrRenderTargetContext> rtCtx(get_rtc(ctx, false));
+
+        check_is_wrapped_status(reporter, rtCtx.get(), false);
+
+        SkImageInfo dstInfo = SkImageInfo::MakeN32Premul(kSize, kSize);
+        SkAutoTMalloc<uint32_t> dstBuffer(kSize * kSize);
+        static const size_t kRowBytes = sizeof(uint32_t) * kSize;
+
+        bool result = rtCtx->readPixels(dstInfo, dstBuffer.get(), kRowBytes, 0, 0);
+        REPORTER_ASSERT(reporter, result);
+
+        check_is_wrapped_status(reporter, rtCtx.get(), true);
+    }
+
+    // TODO: in a future world we should be able to add a test that the majority of
+    // GrRenderTargetContext calls do not force the instantiation of a deferred 
+    // GrRenderTargetContext
+}
+#endif