Add GrOpList and rename GrDrawTarget to GrRenderTargetOpList

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=3910

Change-Id: I026aa26ecc61a0d002e98892dca728536259e8b1
Reviewed-on: https://skia-review.googlesource.com/3910
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

31 files changed, 471 insertions, 378 deletions

diff --git a/src/core/SkTTopoSort.h b/src/core/SkTTopoSort.h
index 35b85eeb81..21c80696e7 100644
--- a/src/core/SkTTopoSort.h
+++ b/src/core/SkTTopoSort.h
@@ -76,7 +76,7 @@ bool SkTTopoSort_Visit(T* node, SkTDArray<T*>* result) {
 //
 // TODO: potentially add a version that takes a seed node and just outputs that
 // node and all the nodes on which it depends. This could be used to partially
-// flush a drawTarget DAG.
+// flush a GrOpList DAG.
 template <typename T, typename Traits = T>
 bool SkTTopoSort(SkTDArray<T*>* graph) {
     SkTDArray<T*> result;
diff --git a/src/gpu/GrBatchFlushState.h b/src/gpu/GrBatchFlushState.h
index 89c5292eea..794bc60da4 100644
--- a/src/gpu/GrBatchFlushState.h
+++ b/src/gpu/GrBatchFlushState.h
@@ -15,7 +15,7 @@
 class GrGpuCommandBuffer;
 class GrResourceProvider;
 
-/** Tracks the state across all the GrBatches in a GrDrawTarget flush. */
+/** Tracks the state across all the GrBatches in a GrOpList flush. */
 class GrBatchFlushState {
 public:
     GrBatchFlushState(GrGpu*, GrResourceProvider*);
diff --git a/src/gpu/GrContext.cpp b/src/gpu/GrContext.cpp
index 176d5da59b..a0884f9274 100644
--- a/src/gpu/GrContext.cpp
+++ b/src/gpu/GrContext.cpp
@@ -90,17 +90,17 @@ void GrContext::initCommon(const GrContextOptions& options) {
 
     fDidTestPMConversions = false;
 
-    GrDrawTarget::Options dtOptions;
-    dtOptions.fClipBatchToBounds = options.fClipBatchToBounds;
-    dtOptions.fDrawBatchBounds = options.fDrawBatchBounds;
-    dtOptions.fMaxBatchLookback = options.fMaxBatchLookback;
-    dtOptions.fMaxBatchLookahead = options.fMaxBatchLookahead;
+    GrRenderTargetOpList::Options rtOpListOptions;
+    rtOpListOptions.fClipBatchToBounds = options.fClipBatchToBounds;
+    rtOpListOptions.fDrawBatchBounds = options.fDrawBatchBounds;
+    rtOpListOptions.fMaxBatchLookback = options.fMaxBatchLookback;
+    rtOpListOptions.fMaxBatchLookahead = options.fMaxBatchLookahead;
     GrPathRendererChain::Options prcOptions;
     prcOptions.fDisableDistanceFieldRenderer = options.fDisableDistanceFieldPaths;
     prcOptions.fAllowPathMaskCaching = options.fAllowPathMaskCaching;
     prcOptions.fDisableAllPathRenderers = options.fForceSWPathMasks;
-    fDrawingManager.reset(new GrDrawingManager(this, dtOptions, prcOptions, options.fImmediateMode,
-                                               &fSingleOwner));
+    fDrawingManager.reset(new GrDrawingManager(this, rtOpListOptions, prcOptions,
+                                               options.fImmediateMode, &fSingleOwner));
 
     // GrBatchFontCache will eventually replace GrFontCache
     fBatchFontCache = new GrBatchFontCache(this);
diff --git a/src/gpu/GrDrawContext.cpp b/src/gpu/GrDrawContext.cpp
index 3060062653..54de4f0ba2 100644
--- a/src/gpu/GrDrawContext.cpp
+++ b/src/gpu/GrDrawContext.cpp
@@ -69,10 +69,10 @@ bool GrDrawContext::wasAbandoned() const {
     return fDrawingManager->wasAbandoned();
 }
 
-// In MDB mode the reffing of the 'getLastDrawTarget' call's result allows in-progress
-// drawTargets to be picked up and added to by drawContexts lower in the call
-// stack. When this occurs with a closed drawTarget, a new one will be allocated
-// when the drawContext attempts to use it (via getDrawTarget).
+// In MDB mode the reffing of the 'getLastOpList' call's result allows in-progress
+// GrOpLists to be picked up and added to by drawContexts lower in the call
+// stack. When this occurs with a closed GrOpList, a new one will be allocated
+// when the drawContext attempts to use it (via getOpList).
 GrDrawContext::GrDrawContext(GrContext* context,
                              GrDrawingManager* drawingMgr,
                              sk_sp<GrRenderTarget> rt,
@@ -82,7 +82,7 @@ GrDrawContext::GrDrawContext(GrContext* context,
                              GrSingleOwner* singleOwner)
     : fDrawingManager(drawingMgr)
     , fRenderTarget(std::move(rt))
-    , fDrawTarget(SkSafeRef(fRenderTarget->getLastDrawTarget()))
+    , fOpList(SkSafeRef(fRenderTarget->getLastRenderTargetOpList()))
     , fContext(context)
     , fInstancedPipelineInfo(fRenderTarget.get())
     , fColorSpace(std::move(colorSpace))
@@ -106,26 +106,26 @@ void GrDrawContext::validate() const {
     SkASSERT(fRenderTarget);
     ASSERT_OWNED_RESOURCE(fRenderTarget);
 
-    if (fDrawTarget && !fDrawTarget->isClosed()) {
-        SkASSERT(fRenderTarget->getLastDrawTarget() == fDrawTarget);
+    if (fOpList && !fOpList->isClosed()) {
+        SkASSERT(fRenderTarget->getLastOpList() == fOpList);
     }
 }
 #endif
 
 GrDrawContext::~GrDrawContext() {
     ASSERT_SINGLE_OWNER
-    SkSafeUnref(fDrawTarget);
+    SkSafeUnref(fOpList);
 }
 
-GrDrawTarget* GrDrawContext::getDrawTarget() {
+GrRenderTargetOpList* GrDrawContext::getOpList() {
     ASSERT_SINGLE_OWNER
     SkDEBUGCODE(this->validate();)
 
-    if (!fDrawTarget || fDrawTarget->isClosed()) {
-        fDrawTarget = fDrawingManager->newDrawTarget(fRenderTarget.get());
+    if (!fOpList || fOpList->isClosed()) {
+        fOpList = fDrawingManager->newOpList(fRenderTarget.get());
     }
 
-    return fDrawTarget;
+    return fOpList;
 }
 
 bool GrDrawContext::copySurface(GrSurface* src, const SkIRect& srcRect, const SkIPoint& dstPoint) {
@@ -134,7 +134,7 @@ bool GrDrawContext::copySurface(GrSurface* src, const SkIRect& srcRect, const Sk
     SkDEBUGCODE(this->validate();)
     GR_AUDIT_TRAIL_AUTO_FRAME(fAuditTrail, "GrDrawContext::copySurface");
 
-    return this->getDrawTarget()->copySurface(fRenderTarget.get(), src, srcRect, dstPoint);
+    return this->getOpList()->copySurface(fRenderTarget.get(), src, srcRect, dstPoint);
 }
 
 void GrDrawContext::drawText(const GrClip& clip, const GrPaint& grPaint,
@@ -191,7 +191,7 @@ void GrDrawContext::discard() {
     GR_AUDIT_TRAIL_AUTO_FRAME(fAuditTrail, "GrDrawContext::discard");
 
     AutoCheckFlush acf(fDrawingManager);
-    this->getDrawTarget()->discard(fRenderTarget.get());
+    this->getOpList()->discard(fRenderTarget.get());
 }
 
 void GrDrawContext::clear(const SkIRect* rect,
@@ -245,13 +245,13 @@ void GrDrawContext::internalClear(const GrFixedClip& clip,
 
         this->drawRect(clip, paint, SkMatrix::I(), clearRect);
     } else if (isFull) {
-        this->getDrawTarget()->fullClear(this->accessRenderTarget(), color);
+        this->getOpList()->fullClear(this->accessRenderTarget(), color);
     } else {
         sk_sp<GrBatch> batch(GrClearBatch::Make(clip, color, this->accessRenderTarget()));
         if (!batch) {
             return;
         }
-        this->getDrawTarget()->addBatch(std::move(batch));
+        this->getOpList()->addBatch(std::move(batch));
     }
 }
 
@@ -396,7 +396,7 @@ bool GrDrawContext::drawFilledRect(const GrClip& clip,
     bool useHWAA;
 
     if (GrCaps::InstancedSupport::kNone != fContext->caps()->instancedSupport()) {
-        InstancedRendering* ir = this->getDrawTarget()->instancedRendering();
+        InstancedRendering* ir = this->getOpList()->instancedRendering();
         batch.reset(ir->recordRect(croppedRect, viewMatrix, paint.getColor(),
                                    paint.isAntiAlias(), fInstancedPipelineInfo,
                                    &useHWAA));
@@ -405,7 +405,7 @@ bool GrDrawContext::drawFilledRect(const GrClip& clip,
             if (ss) {
                 pipelineBuilder.setUserStencil(ss);
             }
-            this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+            this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
             return true;
         }
     }
@@ -423,7 +423,7 @@ bool GrDrawContext::drawFilledRect(const GrClip& clip,
                 if (ss) {
                     pipelineBuilder.setUserStencil(ss);
                 }
-                this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+                this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
                 return true;
             }
         }
@@ -549,7 +549,7 @@ void GrDrawContext::drawRect(const GrClip& clip,
                                          snapToPixelCenters);
             }
 
-            this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+            this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
             return;
         }
     }
@@ -567,15 +567,15 @@ void GrDrawContextPriv::clearStencilClip(const GrFixedClip& clip, bool insideSte
     GR_AUDIT_TRAIL_AUTO_FRAME(fDrawContext->fAuditTrail, "GrDrawContextPriv::clearStencilClip");
 
     AutoCheckFlush acf(fDrawContext->fDrawingManager);
-    fDrawContext->getDrawTarget()->clearStencilClip(clip, insideStencilMask,
-                                                    fDrawContext->accessRenderTarget());
+    fDrawContext->getOpList()->clearStencilClip(clip, insideStencilMask,
+                                                fDrawContext->accessRenderTarget());
 }
 
 void GrDrawContextPriv::stencilPath(const GrClip& clip, 
                                     bool useHWAA,
                                     const SkMatrix& viewMatrix,
                                     const GrPath* path) {
-    fDrawContext->getDrawTarget()->stencilPath(fDrawContext, clip, useHWAA, viewMatrix, path);
+    fDrawContext->getOpList()->stencilPath(fDrawContext, clip, useHWAA, viewMatrix, path);
 }
 
 void GrDrawContextPriv::stencilRect(const GrClip& clip,
@@ -646,13 +646,13 @@ void GrDrawContext::fillRectToRect(const GrClip& clip,
     bool useHWAA;
 
     if (GrCaps::InstancedSupport::kNone != fContext->caps()->instancedSupport()) {
-        InstancedRendering* ir = this->getDrawTarget()->instancedRendering();
+        InstancedRendering* ir = this->getOpList()->instancedRendering();
         SkAutoTUnref<GrDrawBatch> batch(ir->recordRect(croppedRect, viewMatrix, paint.getColor(),
                                                        croppedLocalRect, paint.isAntiAlias(),
                                                        fInstancedPipelineInfo, &useHWAA));
         if (batch) {
             GrPipelineBuilder pipelineBuilder(paint, useHWAA);
-            this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+            this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
             return;
         }
     }
@@ -705,13 +705,13 @@ void GrDrawContext::fillRectWithLocalMatrix(const GrClip& clip,
     bool useHWAA;
 
     if (GrCaps::InstancedSupport::kNone != fContext->caps()->instancedSupport()) {
-        InstancedRendering* ir = this->getDrawTarget()->instancedRendering();
+        InstancedRendering* ir = this->getOpList()->instancedRendering();
         SkAutoTUnref<GrDrawBatch> batch(ir->recordRect(croppedRect, viewMatrix, paint.getColor(),
                                                        localMatrix, paint.isAntiAlias(),
                                                        fInstancedPipelineInfo, &useHWAA));
         if (batch) {
             GrPipelineBuilder pipelineBuilder(paint, useHWAA);
-            this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+            this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
             return;
         }
     }
@@ -726,7 +726,7 @@ void GrDrawContext::fillRectWithLocalMatrix(const GrClip& clip,
         SkAutoTUnref<GrDrawBatch> batch(GrAAFillRectBatch::Create(paint.getColor(), viewMatrix,
                                                                   localMatrix, croppedRect));
         GrPipelineBuilder pipelineBuilder(paint, useHWAA);
-        this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+        this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
         return;
     }
 
@@ -776,7 +776,7 @@ void GrDrawContext::drawVertices(const GrClip& clip,
                                                             colors, texCoords, bounds));
 
     GrPipelineBuilder pipelineBuilder(paint, this->mustUseHWAA(paint));
-    this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+    this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -799,7 +799,7 @@ void GrDrawContext::drawAtlas(const GrClip& clip,
                                                          xform, texRect, colors));
 
     GrPipelineBuilder pipelineBuilder(paint, this->mustUseHWAA(paint));
-    this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+    this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
 }
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -838,13 +838,13 @@ void GrDrawContext::drawRRect(const GrClip& origClip,
 
     if (GrCaps::InstancedSupport::kNone != fContext->caps()->instancedSupport() &&
         stroke.isFillStyle()) {
-        InstancedRendering* ir = this->getDrawTarget()->instancedRendering();
+        InstancedRendering* ir = this->getOpList()->instancedRendering();
         SkAutoTUnref<GrDrawBatch> batch(ir->recordRRect(rrect, viewMatrix, paint.getColor(),
                                                         paint.isAntiAlias(), fInstancedPipelineInfo,
                                                         &useHWAA));
         if (batch) {
             GrPipelineBuilder pipelineBuilder(paint, useHWAA);
-            this->getDrawTarget()->drawBatch(pipelineBuilder, this, *clip, batch);
+            this->getOpList()->drawBatch(pipelineBuilder, this, *clip, batch);
             return;
         }
     }
@@ -860,7 +860,7 @@ void GrDrawContext::drawRRect(const GrClip& origClip,
                                                                 shaderCaps));
         if (batch) {
             GrPipelineBuilder pipelineBuilder(paint, useHWAA);
-            this->getDrawTarget()->drawBatch(pipelineBuilder, this, *clip, batch);
+            this->getOpList()->drawBatch(pipelineBuilder, this, *clip, batch);
             return;
         }
     }
@@ -881,13 +881,13 @@ bool GrDrawContext::drawFilledDRRect(const GrClip& clip,
 
     if (GrCaps::InstancedSupport::kNone != fContext->caps()->instancedSupport()) {
         bool useHWAA;
-        InstancedRendering* ir = this->getDrawTarget()->instancedRendering();
+        InstancedRendering* ir = this->getOpList()->instancedRendering();
         SkAutoTUnref<GrDrawBatch> batch(ir->recordDRRect(origOuter, origInner, viewMatrix,
                                                          paintIn.getColor(), paintIn.isAntiAlias(),
                                                          fInstancedPipelineInfo, &useHWAA));
         if (batch) {
             GrPipelineBuilder pipelineBuilder(paintIn, useHWAA);
-            this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+            this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
             return true;
         }
     }
@@ -997,7 +997,7 @@ void GrDrawContext::drawRegion(const GrClip& clip,
 
     SkAutoTUnref<GrDrawBatch> batch(GrRegionBatch::Create(paint.getColor(), viewMatrix, region));
     GrPipelineBuilder pipelineBuilder(paint, false);
-    this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+    this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
 }
 
 void GrDrawContext::drawOval(const GrClip& clip,
@@ -1022,13 +1022,13 @@ void GrDrawContext::drawOval(const GrClip& clip,
 
     if (GrCaps::InstancedSupport::kNone != fContext->caps()->instancedSupport() &&
         stroke.isFillStyle()) {
-        InstancedRendering* ir = this->getDrawTarget()->instancedRendering();
+        InstancedRendering* ir = this->getOpList()->instancedRendering();
         SkAutoTUnref<GrDrawBatch> batch(ir->recordOval(oval, viewMatrix, paint.getColor(),
                                                        paint.isAntiAlias(), fInstancedPipelineInfo,
                                                        &useHWAA));
         if (batch) {
             GrPipelineBuilder pipelineBuilder(paint, useHWAA);
-            this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+            this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
             return;
         }
     }
@@ -1042,7 +1042,7 @@ void GrDrawContext::drawOval(const GrClip& clip,
                                                                         shaderCaps));
         if (batch) {
             GrPipelineBuilder pipelineBuilder(paint, useHWAA);
-            this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+            this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
             return;
         }
     }
@@ -1074,7 +1074,7 @@ void GrDrawContext::drawArc(const GrClip& clip,
                                                                        shaderCaps));
         if (batch) {
             GrPipelineBuilder pipelineBuilder(paint, useHWAA);
-            this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+            this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
             return;
         }
     }
@@ -1104,7 +1104,7 @@ void GrDrawContext::drawImageLattice(const GrClip& clip,
                                                              std::move(iter), dst));
 
     GrPipelineBuilder pipelineBuilder(paint, this->mustUseHWAA(paint));
-    this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+    this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
 }
 
 void GrDrawContext::prepareForExternalIO() {
@@ -1134,7 +1134,7 @@ void GrDrawContext::drawNonAAFilledRect(const GrClip& clip,
     if (ss) {
         pipelineBuilder.setUserStencil(ss);
     }
-    this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+    this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
 }
 
 bool GrDrawContext::readPixels(const SkImageInfo& dstInfo, void* dstBuffer, size_t dstRowBytes,
@@ -1246,7 +1246,7 @@ void GrDrawContext::drawPath(const GrClip& clip,
                     paint.getColor(), viewMatrix, rects));
                 if (batch) {
                     GrPipelineBuilder pipelineBuilder(paint, useHWAA);
-                    this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+                    this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
                 }
                 return;
             }
@@ -1263,7 +1263,7 @@ void GrDrawContext::drawPath(const GrClip& clip,
                                                                             shaderCaps));
             if (batch) {
                 GrPipelineBuilder pipelineBuilder(paint, useHWAA);
-                this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+                this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
                 return;
             }
         }
@@ -1433,5 +1433,5 @@ void GrDrawContext::drawBatch(const GrPipelineBuilder& pipelineBuilder, const Gr
     SkDEBUGCODE(this->validate();)
     GR_AUDIT_TRAIL_AUTO_FRAME(fAuditTrail, "GrDrawContext::drawBatch");
 
-    this->getDrawTarget()->drawBatch(pipelineBuilder, this, clip, batch);
+    this->getOpList()->drawBatch(pipelineBuilder, this, clip, batch);
 }
diff --git a/src/gpu/GrDrawContextPriv.h b/src/gpu/GrDrawContextPriv.h
index 63eae12a06..a48e4681d6 100644
--- a/src/gpu/GrDrawContextPriv.h
+++ b/src/gpu/GrDrawContextPriv.h
@@ -9,7 +9,7 @@
 #define GrDrawContextPriv_DEFINED
 
 #include "GrDrawContext.h"
-#include "GrDrawTarget.h"
+#include "GrRenderTargetOpList.h"
 #include "GrPathRendering.h"
 
 class GrFixedClip;
@@ -22,7 +22,7 @@ struct GrUserStencilSettings;
 class GrDrawContextPriv {
 public:
     gr_instanced::InstancedRendering* accessInstancedRendering() const {
-        return fDrawContext->getDrawTarget()->instancedRendering();
+        return fDrawContext->getOpList()->instancedRendering();
     }
 
     void clear(const GrFixedClip&, const GrColor, bool canIgnoreClip);
diff --git a/src/gpu/GrDrawingManager.cpp b/src/gpu/GrDrawingManager.cpp
index 5e9b68d88f..0fe173dac3 100644
--- a/src/gpu/GrDrawingManager.cpp
+++ b/src/gpu/GrDrawingManager.cpp
@@ -9,7 +9,6 @@
 
 #include "GrContext.h"
 #include "GrDrawContext.h"
-#include "GrDrawTarget.h"
 #include "GrPathRenderingDrawContext.h"
 #include "GrResourceProvider.h"
 #include "GrSoftwarePathRenderer.h"
@@ -17,25 +16,21 @@
 #include "SkSurface_Gpu.h"
 #include "SkTTopoSort.h"
 
-#include "instanced/InstancedRendering.h"
-
 #include "text/GrAtlasTextContext.h"
 #include "text/GrStencilAndCoverTextContext.h"
 
-using gr_instanced::InstancedRendering;
-
 void GrDrawingManager::cleanup() {
-    for (int i = 0; i < fDrawTargets.count(); ++i) {
-        fDrawTargets[i]->makeClosed();  // no drawTarget should receive a new command after this
-        fDrawTargets[i]->clearRT();
+    for (int i = 0; i < fOpLists.count(); ++i) {
+        fOpLists[i]->makeClosed();  // no opList should receive a new command after this
+        fOpLists[i]->clearTarget();
 
-        // We shouldn't need to do this, but it turns out some clients still hold onto drawtargets
+        // We shouldn't need to do this, but it turns out some clients still hold onto opLists
         // after a cleanup
-        fDrawTargets[i]->reset();
-        fDrawTargets[i]->unref();
+        fOpLists[i]->reset();
+        fOpLists[i]->unref();
     }
 
-    fDrawTargets.reset();
+    fOpLists.reset();
 
     delete fPathRendererChain;
     fPathRendererChain = nullptr;
@@ -48,11 +43,8 @@ GrDrawingManager::~GrDrawingManager() {
 
 void GrDrawingManager::abandon() {
     fAbandoned = true;
-    for (int i = 0; i < fDrawTargets.count(); ++i) {
-        if (GrCaps::InstancedSupport::kNone != fContext->caps()->instancedSupport()) {
-            InstancedRendering* ir = fDrawTargets[i]->instancedRendering();
-            ir->resetGpuResources(InstancedRendering::ResetType::kAbandon);
-        }
+    for (int i = 0; i < fOpLists.count(); ++i) {
+        fOpLists[i]->abandonGpuResources();
     }
     this->cleanup();
 }
@@ -62,17 +54,14 @@ void GrDrawingManager::freeGpuResources() {
     delete fPathRendererChain;
     fPathRendererChain = nullptr;
     SkSafeSetNull(fSoftwarePathRenderer);
-    for (int i = 0; i < fDrawTargets.count(); ++i) {
-        if (GrCaps::InstancedSupport::kNone != fContext->caps()->instancedSupport()) {
-            InstancedRendering* ir = fDrawTargets[i]->instancedRendering();
-            ir->resetGpuResources(InstancedRendering::ResetType::kDestroy);
-        }
+    for (int i = 0; i < fOpLists.count(); ++i) {
+        fOpLists[i]->freeGpuResources();
     }
 }
 
 void GrDrawingManager::reset() {
-    for (int i = 0; i < fDrawTargets.count(); ++i) {
-        fDrawTargets[i]->reset();
+    for (int i = 0; i < fOpLists.count(); ++i) {
+        fOpLists[i]->reset();
     }
     fFlushState.reset();
 }
@@ -84,48 +73,48 @@ void GrDrawingManager::internalFlush(GrResourceCache::FlushType type) {
     fFlushing = true;
     bool flushed = false;
     SkDEBUGCODE(bool result =)
-                        SkTTopoSort<GrDrawTarget, GrDrawTarget::TopoSortTraits>(&fDrawTargets);
+                        SkTTopoSort<GrOpList, GrOpList::TopoSortTraits>(&fOpLists);
     SkASSERT(result);
 
-    for (int i = 0; i < fDrawTargets.count(); ++i) {
-        fDrawTargets[i]->prepareBatches(&fFlushState);
+    for (int i = 0; i < fOpLists.count(); ++i) {
+        fOpLists[i]->prepareBatches(&fFlushState);
     }
 
     // Enable this to print out verbose batching information
 #if 0
-    for (int i = 0; i < fDrawTargets.count(); ++i) {
-        SkDEBUGCODE(fDrawTargets[i]->dump();)
+    for (int i = 0; i < fOpLists.count(); ++i) {
+        SkDEBUGCODE(fOpLists[i]->dump();)
     }
 #endif
 
     // Upload all data to the GPU
     fFlushState.preIssueDraws();
 
-    for (int i = 0; i < fDrawTargets.count(); ++i) {
-        if (fDrawTargets[i]->drawBatches(&fFlushState)) {
+    for (int i = 0; i < fOpLists.count(); ++i) {
+        if (fOpLists[i]->drawBatches(&fFlushState)) {
             flushed = true;
         }
     }
 
     SkASSERT(fFlushState.nextDrawToken() == fFlushState.nextTokenToFlush());
 
-    for (int i = 0; i < fDrawTargets.count(); ++i) {
-        fDrawTargets[i]->reset();
+    for (int i = 0; i < fOpLists.count(); ++i) {
+        fOpLists[i]->reset();
 #ifdef ENABLE_MDB
-        fDrawTargets[i]->unref();
+        fOpLists[i]->unref();
 #endif
     }
 
 #ifndef ENABLE_MDB
-    // When MDB is disabled we keep reusing the same drawTarget
-    if (fDrawTargets.count()) {
-        SkASSERT(fDrawTargets.count() == 1);
+    // When MDB is disabled we keep reusing the same GrOpList
+    if (fOpLists.count()) {
+        SkASSERT(fOpLists.count() == 1);
         // Clear out this flag so the topological sort's SkTTopoSort_CheckAllUnmarked check
         // won't bark
-        fDrawTargets[0]->resetFlag(GrDrawTarget::kWasOutput_Flag);
+        fOpLists[0]->resetFlag(GrOpList::kWasOutput_Flag);
     }
 #else
-    fDrawTargets.reset();
+    fOpLists.reset();
 #endif
 
     fFlushState.reset();
@@ -153,28 +142,33 @@ void GrDrawingManager::prepareSurfaceForExternalIO(GrSurface* surface) {
     }
 }
 
-GrDrawTarget* GrDrawingManager::newDrawTarget(GrRenderTarget* rt) {
+GrRenderTargetOpList* GrDrawingManager::newOpList(GrRenderTarget* rt) {
     SkASSERT(fContext);
 
 #ifndef ENABLE_MDB
-    // When MDB is disabled we always just return the single drawTarget
-    if (fDrawTargets.count()) {
-        SkASSERT(fDrawTargets.count() == 1);
-        // In the non-MDB-world the same drawTarget gets reused for multiple render targets.
+    // When MDB is disabled we always just return the single GrOpList
+    if (fOpLists.count()) {
+        SkASSERT(fOpLists.count() == 1);
+        // In the non-MDB-world the same GrOpList gets reused for multiple render targets.
         // Update this pointer so all the asserts are happy
-        rt->setLastDrawTarget(fDrawTargets[0]);
+        rt->setLastOpList(fOpLists[0]);
         // DrawingManager gets the creation ref - this ref is for the caller
-        return SkRef(fDrawTargets[0]);
+
+        // TODO: although this is true right now it isn't cool
+        return SkRef((GrRenderTargetOpList*) fOpLists[0]);
     }
 #endif
 
-    GrDrawTarget* dt = new GrDrawTarget(rt, fContext->getGpu(), fContext->resourceProvider(),
-                                        fContext->getAuditTrail(), fOptionsForDrawTargets);
+    GrRenderTargetOpList* opList = new GrRenderTargetOpList(rt,
+                                                            fContext->getGpu(),
+                                                            fContext->resourceProvider(),
+                                                            fContext->getAuditTrail(),
+                                                            fOptionsForOpLists);
 
-    *fDrawTargets.append() = dt;
+    *fOpLists.append() = opList;
 
     // DrawingManager gets the creation ref - this ref is for the caller
-    return SkRef(dt);
+    return SkRef(opList);
 }
 
 GrAtlasTextContext* GrDrawingManager::getAtlasTextContext() {
diff --git a/src/gpu/GrDrawingManager.h b/src/gpu/GrDrawingManager.h
index 9fced38163..838bb9b75e 100644
--- a/src/gpu/GrDrawingManager.h
+++ b/src/gpu/GrDrawingManager.h
@@ -9,23 +9,24 @@
 #define GrDrawingManager_DEFINED
 
 #include "text/GrAtlasTextContext.h"
-#include "GrDrawTarget.h"
 #include "GrBatchFlushState.h"
 #include "GrPathRendererChain.h"
 #include "GrPathRenderer.h"
+#include "GrRenderTargetOpList.h"
 #include "GrResourceCache.h"
 #include "SkTDArray.h"
 
+
 class GrContext;
 class GrDrawContext;
 class GrSingleOWner;
 class GrSoftwarePathRenderer;
 
 // The GrDrawingManager allocates a new GrDrawContext for each GrRenderTarget
-// but all of them still land in the same GrDrawTarget!
+// but all of them still land in the same GrOpList!
 //
 // In the future this class will allocate a new GrDrawContext for
-// each GrRenderTarget/GrDrawTarget and manage the DAG.
+// each GrRenderTarget/GrOpList and manage the DAG.
 class GrDrawingManager {
 public:
     ~GrDrawingManager();
@@ -37,9 +38,9 @@ public:
                                          sk_sp<SkColorSpace>,
                                          const SkSurfaceProps*);
 
-    // The caller automatically gets a ref on the returned drawTarget. It must
+    // The caller automatically gets a ref on the returned opList. It must
     // be balanced by an unref call.
-    GrDrawTarget* newDrawTarget(GrRenderTarget* rt);
+    GrRenderTargetOpList* newOpList(GrRenderTarget* rt);
 
     GrContext* getContext() { return fContext; }
 
@@ -63,11 +64,12 @@ public:
     void prepareSurfaceForExternalIO(GrSurface*);
 
 private:
-    GrDrawingManager(GrContext* context, const GrDrawTarget::Options& optionsForDrawTargets,
+    GrDrawingManager(GrContext* context,
+                     const GrRenderTargetOpList::Options& optionsForOpLists,
                      const GrPathRendererChain::Options& optionsForPathRendererChain,
                      bool isImmediateMode, GrSingleOwner* singleOwner)
         : fContext(context)
-        , fOptionsForDrawTargets(optionsForDrawTargets)
+        , fOptionsForOpLists(optionsForOpLists)
         , fOptionsForPathRendererChain(optionsForPathRendererChain)
         , fSingleOwner(singleOwner)
         , fAbandoned(false)
@@ -91,14 +93,14 @@ private:
     static const int kNumDFTOptions = 2;      // DFT or no DFT
 
     GrContext*                        fContext;
-    GrDrawTarget::Options             fOptionsForDrawTargets;
+    GrRenderTargetOpList::Options     fOptionsForOpLists;
     GrPathRendererChain::Options      fOptionsForPathRendererChain;
 
     // In debug builds we guard against improper thread handling
     GrSingleOwner*                    fSingleOwner;
 
     bool                              fAbandoned;
-    SkTDArray<GrDrawTarget*>          fDrawTargets;
+    SkTDArray<GrOpList*>              fOpLists;
 
     SkAutoTDelete<GrAtlasTextContext> fAtlasTextContext;
 
diff --git a/src/gpu/GrGpu.h b/src/gpu/GrGpu.h
index b8703dc68e..ba7ed6f47e 100644
--- a/src/gpu/GrGpu.h
+++ b/src/gpu/GrGpu.h
@@ -331,7 +331,7 @@ public:
     ResetTimestamp getResetTimestamp() const { return fResetTimestamp; }
 
     // Called to perform a surface to surface copy. Fallbacks to issuing a draw from the src to dst
-    // take place at the GrDrawTarget level and this function implement faster copy paths. The rect
+    // take place at the GrOpList level and this function implement faster copy paths. The rect
     // and point are pre-clipped. The src rect and implied dst rect are guaranteed to be within the
     // src/dst bounds and non-empty.
     bool copySurface(GrSurface* dst,
@@ -360,16 +360,16 @@ public:
     // multisample information itself.
     const MultisampleSpecs& getMultisampleSpecs(GrRenderTarget*, const GrStencilSettings&);
 
-    // Creates a GrGpuCommandBuffer in which the GrDrawTarget can send draw commands to instead of
+    // Creates a GrGpuCommandBuffer in which the GrOpList can send draw commands to instead of
     // directly to the Gpu object.
     virtual GrGpuCommandBuffer* createCommandBuffer(
             GrRenderTarget* target,
             const GrGpuCommandBuffer::LoadAndStoreInfo& colorInfo,
             const GrGpuCommandBuffer::LoadAndStoreInfo& stencilInfo) = 0;
 
-    // Called by drawtarget when flushing.
+    // Called by GrOpList when flushing.
     // Provides a hook for post-flush actions (e.g. PLS reset and Vulkan command buffer submits).
-    virtual void finishDrawTarget() {}
+    virtual void finishOpList() {}
 
     virtual GrFence SK_WARN_UNUSED_RESULT insertFence() const = 0;
     virtual bool waitFence(GrFence, uint64_t timeout = 1000) const = 0;
diff --git a/src/gpu/GrOpList.cpp b/src/gpu/GrOpList.cpp
new file mode 100644
index 0000000000..ac7f1b274d
--- /dev/null
+++ b/src/gpu/GrOpList.cpp
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrOpList.h"
+
+#include "GrRenderTarget.h"
+#include "GrRenderTargetOpList.h"
+#include "GrSurface.h"
+
+GrOpList::GrOpList(GrSurface* surface) 
+    : fFlags(0)
+    , fTarget(surface) {
+
+    surface->setLastOpList(this);
+
+#ifdef SK_DEBUG
+    static int debugID = 0;
+    fDebugID = debugID++;
+#endif
+}
+
+GrOpList::~GrOpList() {
+    if (fTarget && this == fTarget->getLastOpList()) {
+        fTarget->setLastOpList(nullptr);
+    }
+}
+
+// Add a GrOpList-based dependency
+void GrOpList::addDependency(GrOpList* dependedOn) {
+    SkASSERT(!dependedOn->dependsOn(this));  // loops are bad
+
+    if (this->dependsOn(dependedOn)) {
+        return;  // don't add duplicate dependencies
+    }
+
+    *fDependencies.push() = dependedOn;
+}
+
+// Convert from a GrSurface-based dependency to a GrOpList one
+void GrOpList::addDependency(GrSurface* dependedOn) {
+    if (dependedOn->getLastOpList()) {
+        // If it is still receiving dependencies, this GrOpList shouldn't be closed
+        SkASSERT(!this->isClosed());
+
+        GrOpList* opList = dependedOn->getLastOpList();
+        if (opList == this) {
+            // self-read - presumably for dst reads
+        } else {
+            this->addDependency(opList);
+
+            // Can't make it closed in the self-read case
+            opList->makeClosed();
+        }
+    }
+}
+
+#ifdef SK_DEBUG
+void GrOpList::dump() const {
+    SkDebugf("--------------------------------------------------------------\n");
+    SkDebugf("node: %d -> RT: %d\n", fDebugID, fTarget ? fTarget->uniqueID() : -1);
+    SkDebugf("relies On (%d): ", fDependencies.count());
+    for (int i = 0; i < fDependencies.count(); ++i) {
+        SkDebugf("%d, ", fDependencies[i]->fDebugID);
+    }
+    SkDebugf("\n");
+}
+#endif
diff --git a/src/gpu/GrOpList.h b/src/gpu/GrOpList.h
new file mode 100644
index 0000000000..4af85128b6
--- /dev/null
+++ b/src/gpu/GrOpList.h
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrOpList_DEFINED
+#define GrOpList_DEFINED
+
+#include "SkRefCnt.h"
+#include "SkTDArray.h"
+
+//#define ENABLE_MDB 1
+
+class GrBatchFlushState;
+class GrSurface;
+
+class GrOpList : public SkRefCnt {
+public:
+    GrOpList(GrSurface* surface);
+    ~GrOpList() override;
+
+    virtual void prepareBatches(GrBatchFlushState* flushState) = 0;
+    virtual bool drawBatches(GrBatchFlushState* flushState) = 0;
+
+    virtual void makeClosed() {
+        // We only close GrOpLists when MDB is enabled. When MDB is disabled there is only
+        // ever one GrOpLists and all calls will be funnelled into it.
+#ifdef ENABLE_MDB
+        this->setFlag(kClosed_Flag);
+#endif    
+    }
+
+    // TODO: it seems a bit odd that GrOpList has nothing to clear on reset
+    virtual void reset() = 0;
+
+    // TODO: in an MDB world, where the OpLists don't allocate GPU resources, it seems like
+    // these could go away
+    virtual void abandonGpuResources() = 0;
+    virtual void freeGpuResources() = 0;
+
+    // TODO: this entry point is only needed in the non-MDB world. Remove when
+    // we make the switch to MDB
+    void clearTarget() { fTarget = nullptr; }
+
+    bool isClosed() const { return this->isSetFlag(kClosed_Flag); }
+
+    /*
+     * Notify this GrOpList that it relies on the contents of 'dependedOn'
+     */
+    void addDependency(GrSurface* dependedOn);
+
+    /*
+     * Does this opList depend on 'dependedOn'?
+     */
+    bool dependsOn(GrOpList* dependedOn) const {
+        return fDependencies.find(dependedOn) >= 0;
+    }
+
+    /*
+     * Dump out the GrOpList dependency DAG
+     */
+    SkDEBUGCODE(virtual void dump() const;)
+
+private:
+    friend class GrDrawingManager; // for resetFlag & TopoSortTraits
+
+    enum Flags {
+        kClosed_Flag    = 0x01,   //!< This GrOpList can't accept any more batches
+
+        kWasOutput_Flag = 0x02,   //!< Flag for topological sorting
+        kTempMark_Flag  = 0x04,   //!< Flag for topological sorting
+    };
+
+    void setFlag(uint32_t flag) {
+        fFlags |= flag;
+    }
+
+    void resetFlag(uint32_t flag) {
+        fFlags &= ~flag;
+    }
+
+    bool isSetFlag(uint32_t flag) const {
+        return SkToBool(fFlags & flag);
+    }
+
+    struct TopoSortTraits {
+        static void Output(GrOpList* dt, int /* index */) {
+            dt->setFlag(GrOpList::kWasOutput_Flag);
+        }
+        static bool WasOutput(const GrOpList* dt) {
+            return dt->isSetFlag(GrOpList::kWasOutput_Flag);
+        }
+        static void SetTempMark(GrOpList* dt) {
+            dt->setFlag(GrOpList::kTempMark_Flag);
+        }
+        static void ResetTempMark(GrOpList* dt) {
+            dt->resetFlag(GrOpList::kTempMark_Flag);
+        }
+        static bool IsTempMarked(const GrOpList* dt) {
+            return dt->isSetFlag(GrOpList::kTempMark_Flag);
+        }
+        static int NumDependencies(const GrOpList* dt) {
+            return dt->fDependencies.count();
+        }
+        static GrOpList* Dependency(GrOpList* dt, int index) {
+            return dt->fDependencies[index];
+        }
+    };
+
+    void addDependency(GrOpList* dependedOn);
+
+    SkDEBUGCODE(int                                 fDebugID;)
+    uint32_t                                        fFlags;
+    GrSurface*                                      fTarget;
+
+    // 'this' GrOpList relies on the output of the GrOpLists in 'fDependencies'
+    SkTDArray<GrOpList*>                            fDependencies;
+
+    typedef SkRefCnt INHERITED;
+};
+
+#endif
diff --git a/src/gpu/GrPathRenderer.h b/src/gpu/GrPathRenderer.h
index 37cc3f9863..3ac18144e0 100644
--- a/src/gpu/GrPathRenderer.h
+++ b/src/gpu/GrPathRenderer.h
@@ -22,7 +22,7 @@ class GrFixedClip;
 struct GrPoint;
 
 /**
- *  Base class for drawing paths into a GrDrawTarget.
+ *  Base class for drawing paths into a GrOpList.
  *
  *  Derived classes can use stages GrPaint::kTotalStages through GrPipelineBuilder::kNumStages-1.
  *  The stages before GrPaint::kTotalStages are reserved for setting up the draw (i.e., textures and
diff --git a/src/gpu/GrPipeline.cpp b/src/gpu/GrPipeline.cpp
index d9ebcf85f9..5e658fcc87 100644
--- a/src/gpu/GrPipeline.cpp
+++ b/src/gpu/GrPipeline.cpp
@@ -9,10 +9,10 @@
 
 #include "GrCaps.h"
 #include "GrDrawContext.h"
-#include "GrDrawTarget.h"
 #include "GrGpu.h"
 #include "GrPipelineBuilder.h"
 #include "GrProcOptInfo.h"
+#include "GrRenderTargetOpList.h"
 #include "GrRenderTargetPriv.h"
 #include "GrXferProcessor.h"
 
@@ -178,8 +178,8 @@ GrPipeline* GrPipeline::CreateAt(void* memory, const CreateArgs& args,
 static void add_dependencies_for_processor(const GrFragmentProcessor* proc, GrRenderTarget* rt) {
     GrFragmentProcessor::TextureAccessIter iter(proc);
     while (const GrTextureAccess* access = iter.next()) {
-        SkASSERT(rt->getLastDrawTarget());
-        rt->getLastDrawTarget()->addDependency(access->getTexture());
+        SkASSERT(rt->getLastOpList());
+        rt->getLastOpList()->addDependency(access->getTexture());
     }
 }
 
@@ -192,8 +192,8 @@ void GrPipeline::addDependenciesTo(GrRenderTarget* rt) const {
 
     for (int i = 0; i < xfer.numTextures(); ++i) {
         GrTexture* texture = xfer.textureAccess(i).getTexture();
-        SkASSERT(rt->getLastDrawTarget());
-        rt->getLastDrawTarget()->addDependency(texture);
+        SkASSERT(rt->getLastOpList());
+        rt->getLastOpList()->addDependency(texture);
     }
 }
 
diff --git a/src/gpu/GrPipeline.h b/src/gpu/GrPipeline.h
index 845044f720..6330de18d9 100644
--- a/src/gpu/GrPipeline.h
+++ b/src/gpu/GrPipeline.h
@@ -105,8 +105,8 @@ public:
     ///////////////////////////////////////////////////////////////////////////
     /// @name GrFragmentProcessors
 
-    // Make the renderTarget's drawTarget (if it exists) be dependent on any
-    // drawTargets in this pipeline
+    // Make the renderTarget's GrOpList (if it exists) be dependent on any
+    // GrOpLists in this pipeline
     void addDependenciesTo(GrRenderTarget* rt) const;
 
     int numColorFragmentProcessors() const { return fNumColorProcessors; }
diff --git a/src/gpu/GrPipelineBuilder.h b/src/gpu/GrPipelineBuilder.h
index 0c33eb344f..cb69756b69 100644
--- a/src/gpu/GrPipelineBuilder.h
+++ b/src/gpu/GrPipelineBuilder.h
@@ -311,7 +311,10 @@ private:
     FragmentProcessorArray                  fCoverageFragmentProcessors;
 
     friend class GrPipeline;
-    friend class GrDrawTarget;
+    // This gives the GrRenderTargetOpList raw access to fColorFragmentProcessors &
+    // fCoverageFragmentProcessors
+    // TODO: that access seems a little dodgy
+    friend class GrRenderTargetOpList;
 };
 
 #endif
diff --git a/src/gpu/GrPrimitiveProcessor.h b/src/gpu/GrPrimitiveProcessor.h
index 00b4df01ed..561f54be03 100644
--- a/src/gpu/GrPrimitiveProcessor.h
+++ b/src/gpu/GrPrimitiveProcessor.h
@@ -171,7 +171,7 @@ public:
     const Attribute& getAttrib(int index) const { return fAttribs[index]; }
 
     // Returns the vertex stride of the GP.  A common use case is to request geometry from a
-    // drawtarget based off of the stride, and to populate this memory using an implicit array of
+    // GrOpList based off of the stride, and to populate this memory using an implicit array of
     // structs.  In this case, it is best to assert the vertexstride == sizeof(VertexStruct).
     size_t getVertexStride() const { return fVertexStride; }
 
diff --git a/src/gpu/GrRenderTarget.cpp b/src/gpu/GrRenderTarget.cpp
index 2053a166e5..d28b2b4191 100644
--- a/src/gpu/GrRenderTarget.cpp
+++ b/src/gpu/GrRenderTarget.cpp
@@ -11,8 +11,8 @@
 #include "GrContext.h"
 #include "GrContextPriv.h"
 #include "GrDrawContext.h"
-#include "GrDrawTarget.h"
 #include "GrGpu.h"
+#include "GrRenderTargetOpList.h"
 #include "GrRenderTargetPriv.h"
 #include "GrStencilAttachment.h"
 
@@ -21,20 +21,12 @@ GrRenderTarget::GrRenderTarget(GrGpu* gpu, const GrSurfaceDesc& desc, Flags flag
     : INHERITED(gpu, desc)
     , fStencilAttachment(stencil)
     , fMultisampleSpecsID(0)
-    , fFlags(flags)
-    , fLastDrawTarget(nullptr) {
+    , fFlags(flags) {
     SkASSERT(!(fFlags & Flags::kMixedSampled) || fDesc.fSampleCnt > 0);
     SkASSERT(!(fFlags & Flags::kWindowRectsSupport) || gpu->caps()->maxWindowRectangles() > 0);
     fResolveRect.setLargestInverted();
 }
 
-GrRenderTarget::~GrRenderTarget() {
-    if (fLastDrawTarget) {
-        fLastDrawTarget->clearRT();
-    }
-    SkSafeUnref(fLastDrawTarget);
-}
-
 void GrRenderTarget::discard() {
     // go through context so that all necessary flushing occurs
     GrContext* context = this->getContext();
@@ -85,24 +77,12 @@ void GrRenderTarget::onAbandon() {
     SkSafeSetNull(fStencilAttachment);
 
     // The contents of this renderTarget are gone/invalid. It isn't useful to point back
-    // the creating drawTarget.
-    this->setLastDrawTarget(nullptr);
+    // the creating opList.
+    this->setLastOpList(nullptr);
 
     INHERITED::onAbandon();
 }
 
-void GrRenderTarget::setLastDrawTarget(GrDrawTarget* dt) {
-    if (fLastDrawTarget) {
-        // The non-MDB world never closes so we can't check this condition
-#ifdef ENABLE_MDB
-        SkASSERT(fLastDrawTarget->isClosed());
-#endif
-        fLastDrawTarget->clearRT();
-    }
-
-    SkRefCnt_SafeAssign(fLastDrawTarget, dt);
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 
 bool GrRenderTargetPriv::attachStencilAttachment(GrStencilAttachment* stencil) {
diff --git a/src/gpu/GrDrawTarget.cpp b/src/gpu/GrRenderTargetOpList.cpp
index 5b2530fa5a..0dbb7772eb 100644
--- a/src/gpu/GrDrawTarget.cpp
+++ b/src/gpu/GrRenderTargetOpList.cpp
@@ -5,7 +5,7 @@
  * found in the LICENSE file.
  */
 
-#include "GrDrawTarget.h"
+#include "GrRenderTargetOpList.h"
 
 #include "GrAppliedClip.h"
 #include "GrAuditTrail.h"
@@ -38,20 +38,22 @@
 
 #include "instanced/InstancedRendering.h"
 
+using gr_instanced::InstancedRendering;
+
 ////////////////////////////////////////////////////////////////////////////////
 
 // Experimentally we have found that most batching occurs within the first 10 comparisons.
 static const int kDefaultMaxBatchLookback  = 10;
 static const int kDefaultMaxBatchLookahead = 10;
 
-GrDrawTarget::GrDrawTarget(GrRenderTarget* rt, GrGpu* gpu, GrResourceProvider* resourceProvider,
-                           GrAuditTrail* auditTrail, const Options& options)
-    : fLastFullClearBatch(nullptr)
+GrRenderTargetOpList::GrRenderTargetOpList(GrRenderTarget* rt, GrGpu* gpu,
+                                           GrResourceProvider* resourceProvider,
+                                           GrAuditTrail* auditTrail, const Options& options)
+    : INHERITED(rt)
+    , fLastFullClearBatch(nullptr)
     , fGpu(SkRef(gpu))
     , fResourceProvider(resourceProvider)
-    , fAuditTrail(auditTrail)
-    , fFlags(0)
-    , fRenderTarget(rt) {
+    , fAuditTrail(auditTrail) {
     // TODO: Stop extracting the context (currently needed by GrClip)
     fContext = fGpu->getContext();
 
@@ -65,63 +67,18 @@ GrDrawTarget::GrDrawTarget(GrRenderTarget* rt, GrGpu* gpu, GrResourceProvider* r
     if (GrCaps::InstancedSupport::kNone != this->caps()->instancedSupport()) {
         fInstancedRendering.reset(fGpu->createInstancedRendering());
     }
-
-    rt->setLastDrawTarget(this);
-
-#ifdef SK_DEBUG
-    static int debugID = 0;
-    fDebugID = debugID++;
-#endif
 }
 
-GrDrawTarget::~GrDrawTarget() {
-    if (fRenderTarget && this == fRenderTarget->getLastDrawTarget()) {
-        fRenderTarget->setLastDrawTarget(nullptr);
-    }
-
+GrRenderTargetOpList::~GrRenderTargetOpList() {
     fGpu->unref();
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
-// Add a GrDrawTarget-based dependency
-void GrDrawTarget::addDependency(GrDrawTarget* dependedOn) {
-    SkASSERT(!dependedOn->dependsOn(this));  // loops are bad
-
-    if (this->dependsOn(dependedOn)) {
-        return;  // don't add duplicate dependencies
-    }
-
-    *fDependencies.push() = dependedOn;
-}
-
-// Convert from a GrSurface-based dependency to a GrDrawTarget one
-void GrDrawTarget::addDependency(GrSurface* dependedOn) {
-    if (dependedOn->asRenderTarget() && dependedOn->asRenderTarget()->getLastDrawTarget()) {
-        // If it is still receiving dependencies, this DT shouldn't be closed
-        SkASSERT(!this->isClosed());
-
-        GrDrawTarget* dt = dependedOn->asRenderTarget()->getLastDrawTarget();
-        if (dt == this) {
-            // self-read - presumably for dst reads
-        } else {
-            this->addDependency(dt);
-
-            // Can't make it closed in the self-read case
-            dt->makeClosed();
-        }
-    }
-}
-
 #ifdef SK_DEBUG
-void GrDrawTarget::dump() const {
-    SkDebugf("--------------------------------------------------------------\n");
-    SkDebugf("node: %d -> RT: %d\n", fDebugID, fRenderTarget ? fRenderTarget->uniqueID() : -1);
-    SkDebugf("relies On (%d): ", fDependencies.count());
-    for (int i = 0; i < fDependencies.count(); ++i) {
-        SkDebugf("%d, ", fDependencies[i]->fDebugID);
-    }
-    SkDebugf("\n");
+void GrRenderTargetOpList::dump() const {
+    INHERITED::dump();
+
     SkDebugf("batches (%d):\n", fRecordedBatches.count());
     for (int i = 0; i < fRecordedBatches.count(); ++i) {
         SkDebugf("*******************************\n");
@@ -140,12 +97,12 @@ void GrDrawTarget::dump() const {
 }
 #endif
 
-bool GrDrawTarget::setupDstReadIfNecessary(const GrPipelineBuilder& pipelineBuilder,
-                                           GrRenderTarget* rt,
-                                           const GrClip& clip,
-                                           const GrPipelineOptimizations& optimizations,
-                                           GrXferProcessor::DstTexture* dstTexture,
-                                           const SkRect& batchBounds) {
+bool GrRenderTargetOpList::setupDstReadIfNecessary(const GrPipelineBuilder& pipelineBuilder,
+                                                   GrRenderTarget* rt,
+                                                   const GrClip& clip,
+                                                   const GrPipelineOptimizations& optimizations,
+                                                   GrXferProcessor::DstTexture* dstTexture,
+                                                   const SkRect& batchBounds) {
     SkRect bounds = batchBounds;
     bounds.outset(0.5f, 0.5f);
 
@@ -202,11 +159,11 @@ bool GrDrawTarget::setupDstReadIfNecessary(const GrPipelineBuilder& pipelineBuil
     return true;
 }
 
-void GrDrawTarget::prepareBatches(GrBatchFlushState* flushState) {
-    // Semi-usually the drawTargets are already closed at this point, but sometimes Ganesh
-    // needs to flush mid-draw. In that case, the SkGpuDevice's drawTargets won't be closed
-    // but need to be flushed anyway. Closing such drawTargets here will mean new
-    // drawTargets will be created to replace them if the SkGpuDevice(s) write to them again.
+void GrRenderTargetOpList::prepareBatches(GrBatchFlushState* flushState) {
+    // Semi-usually the GrOpLists are already closed at this point, but sometimes Ganesh
+    // needs to flush mid-draw. In that case, the SkGpuDevice's GrOpLists won't be closed
+    // but need to be flushed anyway. Closing such GrOpLists here will mean new
+    // GrOpLists will be created to replace them if the SkGpuDevice(s) write to them again.
     this->makeClosed();
 
     // Loop over the batches that haven't yet generated their geometry
@@ -221,7 +178,7 @@ void GrDrawTarget::prepareBatches(GrBatchFlushState* flushState) {
     }
 }
 
-bool GrDrawTarget::drawBatches(GrBatchFlushState* flushState) {
+bool GrRenderTargetOpList::drawBatches(GrBatchFlushState* flushState) {
     if (0 == fRecordedBatches.count()) {
         return false;
     }
@@ -268,11 +225,11 @@ bool GrDrawTarget::drawBatches(GrBatchFlushState* flushState) {
         flushState->setCommandBuffer(nullptr);
     }
 
-    fGpu->finishDrawTarget();
+    fGpu->finishOpList();
     return true;
 }
 
-void GrDrawTarget::reset() {
+void GrRenderTargetOpList::reset() {
     fLastFullClearBatch = nullptr;
     fRecordedBatches.reset();
     if (fInstancedRendering) {
@@ -280,6 +237,20 @@ void GrDrawTarget::reset() {
     }
 }
 
+void GrRenderTargetOpList::abandonGpuResources() {
+    if (GrCaps::InstancedSupport::kNone != fContext->caps()->instancedSupport()) {
+        InstancedRendering* ir = this->instancedRendering();
+        ir->resetGpuResources(InstancedRendering::ResetType::kAbandon);
+    }
+}
+
+void GrRenderTargetOpList::freeGpuResources() {
+    if (GrCaps::InstancedSupport::kNone != fContext->caps()->instancedSupport()) {
+        InstancedRendering* ir = this->instancedRendering();
+        ir->resetGpuResources(InstancedRendering::ResetType::kDestroy);
+    }
+}
+
 static void batch_bounds(SkRect* bounds, const GrBatch* batch) {
     *bounds = batch->bounds();
     if (batch->hasZeroArea()) {
@@ -306,10 +277,10 @@ static void batch_bounds(SkRect* bounds, const GrBatch* batch) {
     }
 }
 
-void GrDrawTarget::drawBatch(const GrPipelineBuilder& pipelineBuilder,
-                             GrDrawContext* drawContext,
-                             const GrClip& clip,
-                             GrDrawBatch* batch) {
+void GrRenderTargetOpList::drawBatch(const GrPipelineBuilder& pipelineBuilder,
+                                     GrDrawContext* drawContext,
+                                     const GrClip& clip,
+                                     GrDrawBatch* batch) {
     // Setup clip
     SkRect bounds;
     batch_bounds(&bounds, batch);
@@ -377,17 +348,17 @@ void GrDrawTarget::drawBatch(const GrPipelineBuilder& pipelineBuilder,
     }
 
 #ifdef ENABLE_MDB
-    SkASSERT(fRenderTarget);
-    batch->pipeline()->addDependenciesTo(fRenderTarget);
+    SkASSERT(fSurface);
+    batch->pipeline()->addDependenciesTo(fSurface);
 #endif
     this->recordBatch(batch, appliedClip.clippedDrawBounds());
 }
 
-void GrDrawTarget::stencilPath(GrDrawContext* drawContext,
-                               const GrClip& clip,
-                               bool useHWAA,
-                               const SkMatrix& viewMatrix,
-                               const GrPath* path) {
+void GrRenderTargetOpList::stencilPath(GrDrawContext* drawContext,
+                                       const GrClip& clip,
+                                       bool useHWAA,
+                                       const SkMatrix& viewMatrix,
+                                       const GrPath* path) {
     // TODO: extract portions of checkDraw that are relevant to path stenciling.
     SkASSERT(path);
     SkASSERT(this->caps()->shaderCaps()->pathRenderingSupport());
@@ -426,11 +397,11 @@ void GrDrawTarget::stencilPath(GrDrawContext* drawContext,
     batch->unref();
 }
 
-void GrDrawTarget::addBatch(sk_sp<GrBatch> batch) {
+void GrRenderTargetOpList::addBatch(sk_sp<GrBatch> batch) {
     this->recordBatch(batch.get(), batch->bounds());
 }
 
-void GrDrawTarget::fullClear(GrRenderTarget* renderTarget, GrColor color) {
+void GrRenderTargetOpList::fullClear(GrRenderTarget* renderTarget, GrColor color) {
     // Currently this just inserts or updates the last clear batch. However, once in MDB this can
     // remove all the previously recorded batches and change the load op to clear with supplied
     // color.
@@ -448,7 +419,7 @@ void GrDrawTarget::fullClear(GrRenderTarget* renderTarget, GrColor color) {
     }
 }
 
-void GrDrawTarget::discard(GrRenderTarget* renderTarget) {
+void GrRenderTargetOpList::discard(GrRenderTarget* renderTarget) {
     // Currently this just inserts a discard batch. However, once in MDB this can remove all the
     // previously recorded batches and change the load op to discard.
     if (this->caps()->discardRenderTargetSupport()) {
@@ -460,10 +431,10 @@ void GrDrawTarget::discard(GrRenderTarget* renderTarget) {
 
 ////////////////////////////////////////////////////////////////////////////////
 
-bool GrDrawTarget::copySurface(GrSurface* dst,
-                               GrSurface* src,
-                               const SkIRect& srcRect,
-                               const SkIPoint& dstPoint) {
+bool GrRenderTargetOpList::copySurface(GrSurface* dst,
+                                       GrSurface* src,
+                                       const SkIRect& srcRect,
+                                       const SkIPoint& dstPoint) {
     GrBatch* batch = GrCopySurfaceBatch::Create(dst, src, srcRect, dstPoint);
     if (!batch) {
         return false;
@@ -491,8 +462,8 @@ static void join(SkRect* out, const SkRect& a, const SkRect& b) {
     out->fBottom = SkTMax(a.fBottom, b.fBottom);
 }
 
-GrBatch* GrDrawTarget::recordBatch(GrBatch* batch, const SkRect& clippedBounds) {
-    // A closed drawTarget should never receive new/more batches
+GrBatch* GrRenderTargetOpList::recordBatch(GrBatch* batch, const SkRect& clippedBounds) {
+    // A closed GrOpList should never receive new/more batches
     SkASSERT(!this->isClosed());
 
     // Check if there is a Batch Draw we can batch with by linearly searching back until we either
@@ -552,7 +523,7 @@ GrBatch* GrDrawTarget::recordBatch(GrBatch* batch, const SkRect& clippedBounds)
     return batch;
 }
 
-void GrDrawTarget::forwardCombine() {
+void GrRenderTargetOpList::forwardCombine() {
     if (fMaxBatchLookahead <= 0) {
         return;
     }
@@ -600,9 +571,9 @@ void GrDrawTarget::forwardCombine() {
 
 ///////////////////////////////////////////////////////////////////////////////
 
-void GrDrawTarget::clearStencilClip(const GrFixedClip& clip,
-                                    bool insideStencilMask,
-                                    GrRenderTarget* rt) {
+void GrRenderTargetOpList::clearStencilClip(const GrFixedClip& clip,
+                                            bool insideStencilMask,
+                                            GrRenderTarget* rt) {
     GrBatch* batch = new GrClearStencilClipBatch(clip, insideStencilMask, rt);
     this->recordBatch(batch, batch->bounds());
     batch->unref();
diff --git a/src/gpu/GrDrawTarget.h b/src/gpu/GrRenderTargetOpList.h
index 35de239150..080ff69ce4 100644
--- a/src/gpu/GrDrawTarget.h
+++ b/src/gpu/GrRenderTargetOpList.h
@@ -5,11 +5,12 @@
  * found in the LICENSE file.
  */
 
-#ifndef GrDrawTarget_DEFINED
-#define GrDrawTarget_DEFINED
+#ifndef GrRenderTargetOpList_DEFINED
+#define GrRenderTargetOpList_DEFINED
 
 #include "GrClip.h"
 #include "GrContext.h"
+#include "GrOpList.h"
 #include "GrPathProcessor.h"
 #include "GrPrimitiveProcessor.h"
 #include "GrPathRendering.h"
@@ -27,8 +28,6 @@
 #include "SkTypes.h"
 #include "SkXfermode.h"
 
-//#define ENABLE_MDB 1
-
 class GrAuditTrail;
 class GrBatch;
 class GrClearBatch;
@@ -38,9 +37,9 @@ class GrPath;
 class GrDrawPathBatchBase;
 class GrPipelineBuilder;
 
-class GrDrawTarget final : public SkRefCnt {
+class GrRenderTargetOpList final : public GrOpList {
 public:
-    /** Options for GrDrawTarget behavior. */
+    /** Options for GrRenderTargetOpList behavior. */
     struct Options {
         Options ()
             : fClipBatchToBounds(false)
@@ -53,54 +52,32 @@ public:
         int  fMaxBatchLookahead;
     };
 
-    GrDrawTarget(GrRenderTarget*, GrGpu*, GrResourceProvider*, GrAuditTrail*, const Options&);
+    GrRenderTargetOpList(GrRenderTarget*, GrGpu*, GrResourceProvider*,
+                         GrAuditTrail*, const Options&);
+
+    ~GrRenderTargetOpList() override;
 
-    ~GrDrawTarget() override;
+    void makeClosed() override {
+        INHERITED::makeClosed();
 
-    void makeClosed() {
         fLastFullClearBatch = nullptr;
-        // We only close drawTargets When MDB is enabled. When MDB is disabled there is only
-        // ever one drawTarget and all calls will be funnelled into it.
-#ifdef ENABLE_MDB
-        this->setFlag(kClosed_Flag);
-#endif
         this->forwardCombine();
     }
 
-    bool isClosed() const { return this->isSetFlag(kClosed_Flag); }
-
-    // TODO: this entry point is only needed in the non-MDB world. Remove when
-    // we make the switch to MDB
-    void clearRT() { fRenderTarget = nullptr; }
-
-    /*
-     * Notify this drawTarget that it relies on the contents of 'dependedOn'
-     */
-    void addDependency(GrSurface* dependedOn);
-
-    /*
-     * Does this drawTarget depend on 'dependedOn'?
-     */
-    bool dependsOn(GrDrawTarget* dependedOn) const {
-        return fDependencies.find(dependedOn) >= 0;
-    }
-
-    /*
-     * Dump out the drawTarget dependency DAG
-     */
-    SkDEBUGCODE(void dump() const;)
-
     /**
      * Empties the draw buffer of any queued up draws.
      */
-    void reset();
+    void reset() override;
+
+    void abandonGpuResources() override;
+    void freeGpuResources() override;
 
     /**
      * Together these two functions flush all queued up draws to GrCommandBuffer. The return value
      * of drawBatches() indicates whether any commands were actually issued to the GPU.
      */
-    void prepareBatches(GrBatchFlushState* flushState);
-    bool drawBatches(GrBatchFlushState* flushState);
+    void prepareBatches(GrBatchFlushState* flushState) override;
+    bool drawBatches(GrBatchFlushState* flushState) override;
 
     /**
      * Gets the capabilities of the draw target.
@@ -150,53 +127,11 @@ public:
         return fInstancedRendering;
     }
 
+    SkDEBUGCODE(void dump() const override;)
+
 private:
-    friend class GrDrawingManager; // for resetFlag & TopoSortTraits
     friend class GrDrawContextPriv; // for clearStencilClip
 
-    enum Flags {
-        kClosed_Flag    = 0x01,   //!< This drawTarget can't accept any more batches
-
-        kWasOutput_Flag = 0x02,   //!< Flag for topological sorting
-        kTempMark_Flag  = 0x04,   //!< Flag for topological sorting
-    };
-
-    void setFlag(uint32_t flag) {
-        fFlags |= flag;
-    }
-
-    void resetFlag(uint32_t flag) {
-        fFlags &= ~flag;
-    }
-
-    bool isSetFlag(uint32_t flag) const {
-        return SkToBool(fFlags & flag);
-    }
-
-    struct TopoSortTraits {
-        static void Output(GrDrawTarget* dt, int /* index */) {
-            dt->setFlag(GrDrawTarget::kWasOutput_Flag);
-        }
-        static bool WasOutput(const GrDrawTarget* dt) {
-            return dt->isSetFlag(GrDrawTarget::kWasOutput_Flag);
-        }
-        static void SetTempMark(GrDrawTarget* dt) {
-            dt->setFlag(GrDrawTarget::kTempMark_Flag);
-        }
-        static void ResetTempMark(GrDrawTarget* dt) {
-            dt->resetFlag(GrDrawTarget::kTempMark_Flag);
-        }
-        static bool IsTempMarked(const GrDrawTarget* dt) {
-            return dt->isSetFlag(GrDrawTarget::kTempMark_Flag);
-        }
-        static int NumDependencies(const GrDrawTarget* dt) {
-            return dt->fDependencies.count();
-        }
-        static GrDrawTarget* Dependency(GrDrawTarget* dt, int index) {
-            return dt->fDependencies[index];
-        }
-    };
-
     // Returns the batch that the input batch was combined with or the input batch if it wasn't
     // combined.
     GrBatch* recordBatch(GrBatch*, const SkRect& clippedBounds);
@@ -212,8 +147,6 @@ private:
                                  GrXferProcessor::DstTexture*,
                                  const SkRect& batchBounds);
 
-    void addDependency(GrDrawTarget* dependedOn);
-
     // Used only by drawContextPriv.
     void clearStencilClip(const GrFixedClip&, bool insideStencilMask, GrRenderTarget*);
 
@@ -229,13 +162,6 @@ private:
     GrResourceProvider*                             fResourceProvider;
     GrAuditTrail*                                   fAuditTrail;
 
-    SkDEBUGCODE(int                                 fDebugID;)
-    uint32_t                                        fFlags;
-
-    // 'this' drawTarget relies on the output of the drawTargets in 'fDependencies'
-    SkTDArray<GrDrawTarget*>                        fDependencies;
-    GrRenderTarget*                                 fRenderTarget;
-
     bool                                            fClipBatchToBounds;
     bool                                            fDrawBatchBounds;
     int                                             fMaxBatchLookback;
@@ -243,7 +169,7 @@ private:
 
     SkAutoTDelete<gr_instanced::InstancedRendering> fInstancedRendering;
 
-    typedef SkRefCnt INHERITED;
+    typedef GrOpList INHERITED;
 };
 
 #endif
diff --git a/src/gpu/GrRenderTargetProxy.cpp b/src/gpu/GrRenderTargetProxy.cpp
index fa6bd26577..5ea43d63d0 100644
--- a/src/gpu/GrRenderTargetProxy.cpp
+++ b/src/gpu/GrRenderTargetProxy.cpp
@@ -8,8 +8,9 @@
 #include "GrRenderTargetProxy.h"
 
 #include "GrCaps.h"
-#include "GrDrawTarget.h"
 #include "GrGpuResourcePriv.h"
+#include "GrRenderTargetOpList.h"
+#include "GrTextureProvider.h"
 
 // Deferred version
 // TODO: we can probably munge the 'desc' in both the wrapped and deferred
@@ -18,8 +19,7 @@ GrRenderTargetProxy::GrRenderTargetProxy(const GrCaps& caps, const GrSurfaceDesc
                                          SkBackingFit fit, SkBudgeted budgeted)
     : INHERITED(desc, fit, budgeted)
     , fTarget(nullptr)
-    , fFlags(GrRenderTargetPriv::Flags::kNone)
-    , fLastDrawTarget(nullptr) {
+    , fFlags(GrRenderTargetPriv::Flags::kNone) {
     // Since we know the newly created render target will be internal, we are able to precompute
     // what the flags will ultimately end up being.
     if (caps.usesMixedSamples() && fDesc.fSampleCnt > 0) {
@@ -35,15 +35,7 @@ GrRenderTargetProxy::GrRenderTargetProxy(const GrCaps& caps, sk_sp<GrRenderTarge
     : INHERITED(rt->desc(), SkBackingFit::kExact,
                 rt->resourcePriv().isBudgeted(), rt->uniqueID())
     , fTarget(std::move(rt))
-    , fFlags(fTarget->renderTargetPriv().flags())
-    , fLastDrawTarget(nullptr) {
-}
-
-GrRenderTargetProxy::~GrRenderTargetProxy() {
-    if (fLastDrawTarget) {
-        fLastDrawTarget->clearRT();
-    }
-    SkSafeUnref(fLastDrawTarget);
+    , fFlags(fTarget->renderTargetPriv().flags()) {
 }
 
 GrRenderTarget* GrRenderTargetProxy::instantiate(GrTextureProvider* texProvider) {
@@ -73,18 +65,6 @@ GrRenderTarget* GrRenderTargetProxy::instantiate(GrTextureProvider* texProvider)
     return fTarget.get();
 }
 
-void GrRenderTargetProxy::setLastDrawTarget(GrDrawTarget* dt) {
-    if (fLastDrawTarget) {
-        // The non-MDB world never closes so we can't check this condition
-#ifdef ENABLE_MDB
-        SkASSERT(fLastDrawTarget->isClosed());
-#endif
-        fLastDrawTarget->clearRT();
-    }
-
-    SkRefCnt_SafeAssign(fLastDrawTarget, dt);
-}
-
 sk_sp<GrRenderTargetProxy> GrRenderTargetProxy::Make(const GrCaps& caps,
                                                      const GrSurfaceDesc& desc,
                                                      SkBackingFit fit,
diff --git a/src/gpu/GrResourceProvider.h b/src/gpu/GrResourceProvider.h
index b4d72d5338..4c90cddd4d 100644
--- a/src/gpu/GrResourceProvider.h
+++ b/src/gpu/GrResourceProvider.h
@@ -96,7 +96,7 @@ public:
 
     enum Flags {
         /** If the caller intends to do direct reads/writes to/from the CPU then this flag must be
-         *  set when accessing resources during a GrDrawTarget flush. This includes the execution of
+         *  set when accessing resources during a GrOpList flush. This includes the execution of
          *  GrBatch objects. The reason is that these memory operations are done immediately and
          *  will occur out of order WRT the operations being flushed.
          *  Make this automatic: https://bug.skia.org/4156
diff --git a/src/gpu/GrSurface.cpp b/src/gpu/GrSurface.cpp
index 3c9368e67f..9fe00ded5d 100644
--- a/src/gpu/GrSurface.cpp
+++ b/src/gpu/GrSurface.cpp
@@ -7,6 +7,7 @@
 
 #include "GrSurface.h"
 #include "GrContext.h"
+#include "GrOpList.h"
 #include "GrSurfacePriv.h"
 
 #include "SkBitmap.h"
@@ -14,6 +15,16 @@
 #include "SkImageEncoder.h"
 #include <stdio.h>
 
+GrSurface::~GrSurface() {
+    if (fLastOpList) {
+        fLastOpList->clearTarget();
+    }
+    SkSafeUnref(fLastOpList);
+
+    // check that invokeReleaseProc has been called (if needed)
+    SkASSERT(NULL == fReleaseProc);
+}
+
 size_t GrSurface::WorstCaseSize(const GrSurfaceDesc& desc) {
     size_t size;
 
@@ -195,3 +206,15 @@ void GrSurface::onAbandon() {
     this->invokeReleaseProc();
     this->INHERITED::onAbandon();
 }
+
+void GrSurface::setLastOpList(GrOpList* opList) {
+    if (fLastOpList) {
+        // The non-MDB world never closes so we can't check this condition
+#ifdef ENABLE_MDB
+        SkASSERT(fLastOpList->isClosed());
+#endif
+        fLastOpList->clearTarget();
+    }
+
+    SkRefCnt_SafeAssign(fLastOpList, opList);
+}
diff --git a/src/gpu/GrSurfaceProxy.cpp b/src/gpu/GrSurfaceProxy.cpp
index f5c401f670..9cd84ed4c6 100644
--- a/src/gpu/GrSurfaceProxy.cpp
+++ b/src/gpu/GrSurfaceProxy.cpp
@@ -7,3 +7,23 @@
 
 #include "GrSurfaceProxy.h"
 
+#include "GrOpList.h"
+
+GrSurfaceProxy::~GrSurfaceProxy() {
+    if (fLastOpList) {
+        fLastOpList->clearTarget();
+    }
+    SkSafeUnref(fLastOpList);
+}
+
+void GrSurfaceProxy::setLastOpList(GrOpList* opList) {
+    if (fLastOpList) {
+        // The non-MDB world never closes so we can't check this condition
+#ifdef ENABLE_MDB
+        SkASSERT(fLastOpList->isClosed());
+#endif
+        fLastOpList->clearTarget();
+    }
+
+    SkRefCnt_SafeAssign(fLastOpList, opList);
+}
diff --git a/src/gpu/GrTracing.h b/src/gpu/GrTracing.h
index 273aa65989..1f2a04ace4 100644
--- a/src/gpu/GrTracing.h
+++ b/src/gpu/GrTracing.h
@@ -57,7 +57,7 @@ private:
 /**
  * GR_CREATE_TRACE_MARKER will place begin and end trace markers for both
  * cpu and gpu (if gpu tracing enabled) for the current scope.
- * name is of type const char* and target is of type GrDrawTarget*
+ * name is of type const char* and target is of type GrOpList*
  */
 #define GR_CREATE_TRACE_MARKER(name, target)                                                       \
     /* Chromium tracing */                                                                         \
diff --git a/src/gpu/GrUserStencilSettings.h b/src/gpu/GrUserStencilSettings.h
index 32fb1396f9..18002591ec 100644
--- a/src/gpu/GrUserStencilSettings.h
+++ b/src/gpu/GrUserStencilSettings.h
@@ -13,12 +13,12 @@
 
 /**
  * Gr uses the stencil buffer to implement complex clipping inside the
- * GrDrawTarget class. The GrDrawTarget makes a subset of the stencil buffer
+ * GrOpList class. The GrOpList makes a subset of the stencil buffer
  * bits available for other uses by external code (user bits). Client code can
- * modify these bits. GrDrawTarget will ignore ref, mask, and writemask bits
+ * modify these bits. GrOpList will ignore ref, mask, and writemask bits
  * provided by clients that fall outside the user range.
  *
- * When code outside the GrDrawTarget class uses the stencil buffer the contract
+ * When code outside the GrOpList class uses the stencil buffer the contract
  * is as follows:
  *
  * > Normal stencil funcs allow the client to pass / fail regardless of the
diff --git a/src/gpu/batches/GrDrawBatch.h b/src/gpu/batches/GrDrawBatch.h
index 5f37b7b000..e675f5fc4d 100644
--- a/src/gpu/batches/GrDrawBatch.h
+++ b/src/gpu/batches/GrDrawBatch.h
@@ -42,7 +42,7 @@ private:
 };
 
 /**
- * Base class for GrBatches that draw. These batches have a GrPipeline installed by GrDrawTarget.
+ * Base class for GrBatches that draw. These batches have a GrPipeline installed by GrOpList.
  */
 class GrDrawBatch : public GrBatch {
 public:
diff --git a/src/gpu/batches/GrTessellatingPathRenderer.cpp b/src/gpu/batches/GrTessellatingPathRenderer.cpp
index 57eac3c4b2..cb4f2c79ed 100644
--- a/src/gpu/batches/GrTessellatingPathRenderer.cpp
+++ b/src/gpu/batches/GrTessellatingPathRenderer.cpp
@@ -12,7 +12,6 @@
 #include "GrBatchTest.h"
 #include "GrClip.h"
 #include "GrDefaultGeoProcFactory.h"
-#include "GrDrawTarget.h"
 #include "GrMesh.h"
 #include "GrPathUtils.h"
 #include "GrPipelineBuilder.h"
diff --git a/src/gpu/gl/GrGLGpu.cpp b/src/gpu/gl/GrGLGpu.cpp
index 1e8049727b..3a32e2b67d 100644
--- a/src/gpu/gl/GrGLGpu.cpp
+++ b/src/gpu/gl/GrGLGpu.cpp
@@ -2238,7 +2238,7 @@ void GrGLGpu::clearStencilClip(const GrFixedClip& clip,
 #else
     // we could just clear the clip bit but when we go through
     // ANGLE a partial stencil mask will cause clears to be
-    // turned into draws. Our contract on GrDrawTarget says that
+    // turned into draws. Our contract on GrOpList says that
     // changing the clip between stencil passes may or may not
     // zero the client's clip bits. So we just clear the whole thing.
     static const GrGLint clipStencilMask  = ~0;
@@ -2616,7 +2616,7 @@ GrGpuCommandBuffer* GrGLGpu::createCommandBuffer(
     return new GrGLGpuCommandBuffer(this, static_cast<GrGLRenderTarget*>(target));
 }
 
-void GrGLGpu::finishDrawTarget() {
+void GrGLGpu::finishOpList() {
     if (fPLSHasBeenUsed) {
         /* There is an ARM driver bug where if we use PLS, and then draw a frame which does not
          * use PLS, it leaves garbage all over the place. As a workaround, we use PLS in a
diff --git a/src/gpu/gl/GrGLGpu.h b/src/gpu/gl/GrGLGpu.h
index 7ba79b2eea..0160835c6e 100644
--- a/src/gpu/gl/GrGLGpu.h
+++ b/src/gpu/gl/GrGLGpu.h
@@ -142,7 +142,7 @@ public:
 
     void drawDebugWireRect(GrRenderTarget*, const SkIRect&, GrColor) override;
 
-    void finishDrawTarget() override;
+    void finishOpList() override;
 
     GrFence SK_WARN_UNUSED_RESULT insertFence() const override;
     bool waitFence(GrFence, uint64_t timeout) const override;
diff --git a/src/gpu/text/GrStencilAndCoverTextContext.h b/src/gpu/text/GrStencilAndCoverTextContext.h
index 0f6735e133..c87041a9e4 100644
--- a/src/gpu/text/GrStencilAndCoverTextContext.h
+++ b/src/gpu/text/GrStencilAndCoverTextContext.h
@@ -25,7 +25,7 @@ class SkSurfaceProps;
 
 /*
  * This class implements text rendering using stencil and cover path rendering
- * (by the means of GrDrawTarget::drawPath).
+ * (by the means of GrOpList::drawPath).
  */
 class GrStencilAndCoverTextContext {
 public:
diff --git a/src/gpu/vk/GrVkGpu.cpp b/src/gpu/vk/GrVkGpu.cpp
index 0eb8241a94..b13e16282e 100644
--- a/src/gpu/vk/GrVkGpu.cpp
+++ b/src/gpu/vk/GrVkGpu.cpp
@@ -1323,7 +1323,7 @@ void GrVkGpu::addImageMemoryBarrier(VkPipelineStageFlags srcStageMask,
                                        barrier);
 }
 
-void GrVkGpu::finishDrawTarget() {
+void GrVkGpu::finishOpList() {
     // Submit the current command buffer to the Queue
     this->submitCommandBuffer(kSkip_SyncQueue);
 }
diff --git a/src/gpu/vk/GrVkGpu.h b/src/gpu/vk/GrVkGpu.h
index 273f28c5db..77eb24215c 100644
--- a/src/gpu/vk/GrVkGpu.h
+++ b/src/gpu/vk/GrVkGpu.h
@@ -139,7 +139,7 @@ public:
                                       GrVkRenderTarget*,
                                       const SkIRect& bounds);
 
-    void finishDrawTarget() override;
+    void finishOpList() override;
 
     GrFence SK_WARN_UNUSED_RESULT insertFence() const override;
     bool waitFence(GrFence, uint64_t timeout) const override;