Add a full clear method to GrDrawTarget.

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"
 #include "GrCaps.h"
 #include "GrDrawContext.h"
 #include "GrGpu.h"
 #include "GrGpuCommandBuffer.h"
 #include "GrPath.h"
 #include "GrPipeline.h"
 #include "GrMemoryPool.h"
 #include "GrPipelineBuilder.h"
 #include "GrRenderTarget.h"
 #include "GrResourceProvider.h"
 #include "GrRenderTargetPriv.h"
 #include "GrStencilAttachment.h"
 #include "GrSurfacePriv.h"
 #include "GrTexture.h"
 #include "gl/GrGLRenderTarget.h"
 
 #include "SkStrokeRec.h"
 
+#include "batches/GrClearBatch.h"
 #include "batches/GrClearStencilClipBatch.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"
 
@@ skipping 410 matching lines @@
                                                 drawContext->accessRenderTarget(),
                                                 path);
     this->recordBatch(batch, appliedClip.deviceBounds());
     batch->unref();
 }
 
 void GrDrawTarget::addBatch(sk_sp<GrBatch> batch) {
     this->recordBatch(batch.get(), batch->bounds());
 }
 
+void GrDrawTarget::fullClear(GrRenderTarget* renderTarget, GrColor color) {
+    // Currently this just inserts a clear batch. However, once in MDB this can remove all the
+    // previously recorded batches and change the load op to clear with supplied color.
+    sk_sp<GrBatch> batch = GrClearBatch::Make(SkIRect::MakeWH(renderTarget->width(),
+                                                              renderTarget->height()),
+                                              color, renderTarget);
+    this->recordBatch(batch.get(), batch->bounds());
+}
+
 void GrDrawTarget::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()) {
         GrBatch* batch = new GrDiscardBatch(renderTarget);
         this->recordBatch(batch, batch->bounds());
         batch->unref();
     }
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 
 bool GrDrawTarget::copySurface(GrSurface* dst,
@@ skipping 129 matching lines @@
     }
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 void GrDrawTarget::clearStencilClip(const SkIRect& rect, bool insideClip, GrRenderTarget* rt) {
     GrBatch* batch = new GrClearStencilClipBatch(rect, insideClip, rt);
     this->recordBatch(batch, batch->bounds());
     batch->unref();
 }