Enable blend optimizations with instanced draws

src/gpu/GrDrawTarget.cpp

 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrDrawTarget.h"
 
 #include "GrAuditTrail.h"
@@ skipping 15 matching lines @@
 #include "SkStrokeRec.h"
 
 #include "batches/GrClearBatch.h"
 #include "batches/GrCopySurfaceBatch.h"
 #include "batches/GrDiscardBatch.h"
 #include "batches/GrDrawBatch.h"
 #include "batches/GrDrawPathBatch.h"
 #include "batches/GrRectBatchFactory.h"
 #include "batches/GrStencilPathBatch.h"
 
+#include "instanced/InstancedRendering.h"
+
 ////////////////////////////////////////////////////////////////////////////////
 
 // 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)
     : fGpu(SkRef(gpu))
     , fResourceProvider(resourceProvider)
     , fAuditTrail(auditTrail)
     , fFlags(0)
-    , fRenderTarget(rt) {
+    , fRenderTarget(rt)
+    , fInstancedRendering(fGpu->createInstancedRenderingIfSupported()) {
     // TODO: Stop extracting the context (currently needed by GrClipMaskManager)
     fContext = fGpu->getContext();
 
     fClipBatchToBounds = options.fClipBatchToBounds;
     fDrawBatchBounds = options.fDrawBatchBounds;
     fMaxBatchLookback = (options.fMaxBatchLookback < 0) ? kDefaultMaxBatchLookback :
                                                           options.fMaxBatchLookback;
     fMaxBatchLookahead = (options.fMaxBatchLookahead < 0) ? kDefaultMaxBatchLookahead :
                                                            options.fMaxBatchLookahead;
 
@@ skipping 135 matching lines @@
     // 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.
     this->makeClosed();
 
     // Loop over the batches that haven't yet generated their geometry
     for (int i = 0; i < fBatches.count(); ++i) {
         if (fBatches[i]) {
             fBatches[i]->prepare(flushState);
         }
     }
+
+    if (fInstancedRendering) {
+        fInstancedRendering->beginFlush(flushState->resourceProvider());
+    }
 }
 
 void GrDrawTarget::drawBatches(GrBatchFlushState* flushState) {
     // Draw all the generated geometry.
     SkRandom random;
     GrRenderTarget* currentRT = nullptr;
     SkAutoTDelete<GrGpuCommandBuffer> commandBuffer;
     SkRect bounds = SkRect::MakeEmpty();
     for (int i = 0; i < fBatches.count(); ++i) {
         if (!fBatches[i]) {
@@ skipping 48 matching lines @@
             commandBuffer->submit(iBounds);
         }
         flushState->setCommandBuffer(nullptr);
     }
 
     fGpu->finishDrawTarget();
 }
 
 void GrDrawTarget::reset() {
     fBatches.reset();
+    if (fInstancedRendering) {
+        fInstancedRendering->endFlush();
+    }
 }
 
 void GrDrawTarget::drawBatch(const GrPipelineBuilder& pipelineBuilder,
                              GrDrawContext* drawContext,
                              const GrClip& clip,
                              GrDrawBatch* batch) {
     // Setup clip
     GrAppliedClip appliedClip;
     if (!clip.apply(fContext, pipelineBuilder, drawContext, &batch->bounds(), &appliedClip)) {
         return;
@@ skipping 280 matching lines @@
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 void GrDrawTarget::clearStencilClip(const SkIRect& rect, bool insideClip, GrRenderTarget* rt) {
     GrBatch* batch = new GrClearStencilClipBatch(rect, insideClip, rt);
     this->recordBatch(batch);
     batch->unref();
 }