Revert "Revert "Add GrRenderTargetContext instantiate & asTextureProxy""

This reverts commit 7d7d7d19462b75f5470492dc4820a02c1eba4af2.

Reason for revert: Reverting this to see if it really was crashing on SVGs or if that was cross talk.

Original change's description:
> Revert "Add GrRenderTargetContext instantiate & asTextureProxy"
> 
> This reverts commit 9113edfff89e657dabc0ba095c54f7720550196c.
> 
> Reason for revert: Looks to be causing EXCEPTION_ACCESS_VIOLATION:
> 
> https://uberchromegw.corp.google.com/i/client.skia/builders/Test-Win-MSVC-NUC-GPU-IntelIris6100-x86_64-Debug/builds/121/steps/test_skia%20on%20Windows/logs/stdio
> https://uberchromegw.corp.google.com/i/client.skia/builders/Test-Win-MSVC-GCE-CPU-AVX2-x86-Debug/builds/2384/steps/test_skia%20on%20Windows-2008ServerR2-SP1/logs/stdio
> https://uberchromegw.corp.google.com/i/client.skia/builders/Test-Win-MSVC-ShuttleC-GPU-iHD530-x86_64-Debug/builds/785/steps/test_skia%20on%20Windows/logs/stdio
> 
> Original change's description:
> > Add GrRenderTargetContext instantiate & asTextureProxy
> > 
> > This CL also centralizes the instantiation code in GrSurfaceProxy and adds a test.
> > 
> > GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4494
> > 
> > Change-Id: I0081d9a216dc0af293179f23bcb88acf6a822324
> > Reviewed-on: https://skia-review.googlesource.com/4494
> > Reviewed-by: Brian Salomon <bsalomon@google.com>
> > Commit-Queue: Robert Phillips <robertphillips@google.com>
> > 
> 
> TBR=bsalomon@google.com,robertphillips@google.com,reviews@skia.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> 
> Change-Id: I225ce7867ebd445067e5ea55ebbfd587f7fe782a
> Reviewed-on: https://skia-review.googlesource.com/4528
> Commit-Queue: Leon Scroggins <scroggo@google.com>
> Reviewed-by: Leon Scroggins <scroggo@google.com>
> 

TBR=bsalomon@google.com,robertphillips@google.com,scroggo@google.com,reviews@skia.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Change-Id: Ifc3b9ac343009a3808f5f47500eef50df438e3d9
Reviewed-on: https://skia-review.googlesource.com/4537
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>

11 files changed, 162 insertions, 39 deletions

diff --git a/gn/tests.gni b/gn/tests.gni
index 135c3ce412..4fa653a037 100644
--- a/gn/tests.gni
+++ b/gn/tests.gni
@@ -173,6 +173,7 @@ tests_sources = [
   "$_tests/RefCntTest.cpp",
   "$_tests/RefDictTest.cpp",
   "$_tests/RegionTest.cpp",
+  "$_tests/RenderTargetContextTest.cpp",
   "$_tests/ResourceCacheTest.cpp",
   "$_tests/RoundRectTest.cpp",
   "$_tests/RRectInPathTest.cpp",
diff --git a/include/gpu/GrRenderTargetContext.h b/include/gpu/GrRenderTargetContext.h
index f728ef15b2..95d8c9d463 100644
--- a/include/gpu/GrRenderTargetContext.h
+++ b/include/gpu/GrRenderTargetContext.h
@@ -33,6 +33,7 @@ class GrRenderTarget;
 class GrRenderTargetOpList;
 class GrStyle;
 class GrSurface;
+class GrTextureProxy;
 struct GrUserStencilSettings;
 class SkDrawFilter;
 struct SkIPoint;
@@ -342,17 +343,20 @@ public:
 
     bool wasAbandoned() const;
 
+    GrRenderTarget* instantiate();
+
     GrRenderTarget* accessRenderTarget() {
         // TODO: usage of this entry point needs to be reduced and potentially eliminated
         // since it ends the deferral of the GrRenderTarget's allocation
         return fRenderTargetProxy->instantiate(fContext->textureProvider());
     }
 
+    GrTextureProxy* asDeferredTexture();
+
     sk_sp<GrTexture> asTexture() {
         // TODO: usage of this entry point needs to be reduced and potentially eliminated
         // since it ends the deferral of the GrRenderTarget's allocation
-        // It's usage should migrate to the soon-to-be-added asDeferredTexture which
-        // returns a GrTextureProxy
+        // It's usage should migrate to asDeferredTexture
         return sk_ref_sp(this->accessRenderTarget()->asTexture());
     }
 
@@ -362,6 +366,8 @@ public:
 
     GrAuditTrail* auditTrail() { return fAuditTrail; }
 
+    bool isWrapped_ForTesting() const;
+
 protected:
     GrRenderTargetContext(GrContext*, GrDrawingManager*, sk_sp<GrRenderTargetProxy>,
                           sk_sp<SkColorSpace>, const SkSurfaceProps* surfaceProps, GrAuditTrail*,
diff --git a/include/private/GrRenderTargetProxy.h b/include/private/GrRenderTargetProxy.h
index 3bad9df9e4..267d7549e3 100644
--- a/include/private/GrRenderTargetProxy.h
+++ b/include/private/GrRenderTargetProxy.h
@@ -27,7 +27,6 @@ public:
                                            SkBackingFit, SkBudgeted);
     static sk_sp<GrRenderTargetProxy> Make(sk_sp<GrRenderTarget>);
 
-    // TODO: add asTextureProxy variants
     GrRenderTargetProxy* asRenderTargetProxy() override { return this; }
     const GrRenderTargetProxy* asRenderTargetProxy() const override { return this; }
 
diff --git a/include/private/GrSurfaceProxy.h b/include/private/GrSurfaceProxy.h
index e748853cfd..539aaf65aa 100644
--- a/include/private/GrSurfaceProxy.h
+++ b/include/private/GrSurfaceProxy.h
@@ -13,6 +13,7 @@
 #include "SkRect.h"
 
 class GrOpList;
+class GrTextureProvider;
 class GrTextureProxy;
 class GrRenderTargetProxy;
 
@@ -127,6 +128,8 @@ public:
         return fGpuMemorySize;
     }
 
+    bool isWrapped_ForTesting() const;
+
 protected:
     // Deferred version
     GrSurfaceProxy(const GrSurfaceDesc& desc, SkBackingFit fit, SkBudgeted budgeted)
@@ -143,6 +146,8 @@ protected:
 
     virtual ~GrSurfaceProxy();
 
+    GrSurface* instantiate(GrTextureProvider* texProvider);
+
     // For wrapped resources, 'fDesc' will always be filled in from the wrapped resource.
     const GrSurfaceDesc fDesc;
     const SkBackingFit  fFit;      // always exact for wrapped resources
diff --git a/include/private/GrTextureProxy.h b/include/private/GrTextureProxy.h
index e68ef8896a..75f09de800 100644
--- a/include/private/GrTextureProxy.h
+++ b/include/private/GrTextureProxy.h
@@ -24,7 +24,6 @@ public:
                                       const void* srcData = nullptr, size_t rowBytes = 0);
     static sk_sp<GrTextureProxy> Make(sk_sp<GrTexture>);
 
-    // TODO: add asRenderTargetProxy variants
     GrTextureProxy* asTextureProxy() override { return this; }
     const GrTextureProxy* asTextureProxy() const override { return this; }
 
diff --git a/src/gpu/GrRenderTargetContext.cpp b/src/gpu/GrRenderTargetContext.cpp
index f1f17b03ea..4c86cbc464 100644
--- a/src/gpu/GrRenderTargetContext.cpp
+++ b/src/gpu/GrRenderTargetContext.cpp
@@ -117,6 +117,14 @@ GrRenderTargetContext::~GrRenderTargetContext() {
     SkSafeUnref(fOpList);
 }
 
+GrRenderTarget* GrRenderTargetContext::instantiate() {
+    return fRenderTargetProxy->instantiate(fContext->textureProvider());
+}
+
+GrTextureProxy* GrRenderTargetContext::asDeferredTexture() {
+    return fRenderTargetProxy->asTextureProxy();
+}
+
 GrRenderTargetOpList* GrRenderTargetContext::getOpList() {
     ASSERT_SINGLE_OWNER
     SkDEBUGCODE(this->validate();)
diff --git a/src/gpu/GrRenderTargetProxy.cpp b/src/gpu/GrRenderTargetProxy.cpp
index f428a0fb73..fcc5275002 100644
--- a/src/gpu/GrRenderTargetProxy.cpp
+++ b/src/gpu/GrRenderTargetProxy.cpp
@@ -37,33 +37,17 @@ GrRenderTargetProxy::GrRenderTargetProxy(sk_sp<GrRenderTarget> rt)
 }
 
 GrRenderTarget* GrRenderTargetProxy::instantiate(GrTextureProvider* texProvider) {
-    if (fTarget) {
-        return fTarget->asRenderTarget();
-    }
+    SkASSERT(fDesc.fFlags & GrSurfaceFlags::kRenderTarget_GrSurfaceFlag);
 
-    // TODO: it would be nice to not have to copy the desc here
-    GrSurfaceDesc desc = fDesc;
-    desc.fFlags |= GrSurfaceFlags::kRenderTarget_GrSurfaceFlag;
-
-    if (SkBackingFit::kApprox == fFit) {
-        fTarget = texProvider->createApproxTexture(desc);
-    } else {
-        fTarget = texProvider->createTexture(desc, fBudgeted);
-    }
-    if (!fTarget) {
+    GrSurface* surf = INHERITED::instantiate(texProvider);
+    if (!surf || !surf->asRenderTarget()) {
         return nullptr;
     }
 
-#ifdef SK_DEBUG
-    if (kInvalidGpuMemorySize != this->getRawGpuMemorySize_debugOnly()) {
-        SkASSERT(fTarget->gpuMemorySize() <= this->getRawGpuMemorySize_debugOnly());    
-    }
-#endif
-
     // Check that our a priori computation matched the ultimate reality
-    SkASSERT(fFlags == fTarget->asRenderTarget()->renderTargetPriv().flags());
+    SkASSERT(fFlags == surf->asRenderTarget()->renderTargetPriv().flags());
 
-    return fTarget->asRenderTarget();
+    return surf->asRenderTarget();
 }
 
 
diff --git a/src/gpu/GrSurfaceProxy.cpp b/src/gpu/GrSurfaceProxy.cpp
index c5afd0f262..b6d0e11cbb 100644
--- a/src/gpu/GrSurfaceProxy.cpp
+++ b/src/gpu/GrSurfaceProxy.cpp
@@ -9,6 +9,7 @@
 
 #include "GrGpuResourcePriv.h"
 #include "GrOpList.h"
+#include "GrTextureProvider.h"
 
 GrSurfaceProxy::GrSurfaceProxy(sk_sp<GrSurface> surface, SkBackingFit fit)
     : INHERITED(std::move(surface))
@@ -27,6 +28,29 @@ GrSurfaceProxy::~GrSurfaceProxy() {
     SkSafeUnref(fLastOpList);
 }
 
+GrSurface* GrSurfaceProxy::instantiate(GrTextureProvider* texProvider) {
+    if (fTarget) {
+        return fTarget;
+    }
+
+    if (SkBackingFit::kApprox == fFit) {
+        fTarget = texProvider->createApproxTexture(fDesc);
+    } else {
+        fTarget = texProvider->createTexture(fDesc, fBudgeted);
+    }
+    if (!fTarget) {
+        return nullptr;
+    }
+
+#ifdef SK_DEBUG
+    if (kInvalidGpuMemorySize != this->getRawGpuMemorySize_debugOnly()) {
+        SkASSERT(fTarget->gpuMemorySize() <= this->getRawGpuMemorySize_debugOnly());    
+    }
+#endif
+
+    return fTarget;
+}
+
 void GrSurfaceProxy::setLastOpList(GrOpList* opList) {
     if (fLastOpList) {
         // The non-MDB world never closes so we can't check this condition
diff --git a/src/gpu/GrTextureProxy.cpp b/src/gpu/GrTextureProxy.cpp
index ca773b3eaf..5fe43f7125 100644
--- a/src/gpu/GrTextureProxy.cpp
+++ b/src/gpu/GrTextureProxy.cpp
@@ -21,21 +21,10 @@ GrTextureProxy::GrTextureProxy(sk_sp<GrTexture> tex)
 }
 
 GrTexture* GrTextureProxy::instantiate(GrTextureProvider* texProvider) {
-    if (fTarget) {
-        return fTarget->asTexture();
-    }
-
-    if (SkBackingFit::kApprox == fFit) {
-        fTarget = texProvider->createApproxTexture(fDesc);
-    } else {
-        fTarget = texProvider->createTexture(fDesc, fBudgeted);
-    }
-
-#ifdef SK_DEBUG
-    if (kInvalidGpuMemorySize != this->getRawGpuMemorySize_debugOnly()) {
-        SkASSERT(fTarget->gpuMemorySize() <= this->getRawGpuMemorySize_debugOnly());
+    GrSurface* surf = this->INHERITED::instantiate(texProvider);
+    if (!surf) {
+        return nullptr;
     }
-#endif
 
     return fTarget->asTexture();
 }
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
diff --git a/tools/gpu/GrTest.cpp b/tools/gpu/GrTest.cpp
index ba870ea25e..8574399d74 100644
--- a/tools/gpu/GrTest.cpp
+++ b/tools/gpu/GrTest.cpp
@@ -62,6 +62,14 @@ void GrTestTarget::init(GrContext* ctx, sk_sp<GrRenderTargetContext> renderTarge
     fRenderTargetContext = renderTargetContext;
 }
 
+bool GrSurfaceProxy::isWrapped_ForTesting() const {
+    return SkToBool(fTarget);
+}
+
+bool GrRenderTargetContext::isWrapped_ForTesting() const {
+    return fRenderTargetProxy->isWrapped_ForTesting();
+}
+
 void GrContext::getTestTarget(GrTestTarget* tar, sk_sp<GrRenderTargetContext> renderTargetContext) {
     this->flush();
     SkASSERT(renderTargetContext);