Fix vulkan warning in RecordReplaceDrawTest

tests/RecordReplaceDrawTest.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "Test.h"
 
 #if SK_SUPPORT_GPU
@@ skipping 105 matching lines @@
                                                              SkIRect::MakeWH(kWidth, kHeight),
                                                              SkIRect::MakeWH(kWidth, kHeight),
                                                              SkMatrix::I(), key, 1, &paint);
 
         GrSurfaceDesc desc;
         desc.fConfig = kSkia8888_GrPixelConfig;
         desc.fFlags = kRenderTarget_GrSurfaceFlag;
         desc.fWidth = kWidth;
         desc.fHeight = kHeight;
         desc.fSampleCnt = 0;
 

[robertphillips, 2016/06/23 19:14:07]

texture ?

+        // Giving the texutre some initial data so the Gpu (specifically vulkan) does not complain
+        // when reading from an uninitialized texture.
+        SkAutoTMalloc<uint32_t> srcBuffer(kWidth*kHeight);
+        memset(srcBuffer.get(), 0, kWidth*kHeight*sizeof(uint32_t));
+
         texture.reset(context->textureProvider()->createTexture(
-                desc, SkBudgeted::kNo, nullptr, 0));
+                desc, SkBudgeted::kNo, srcBuffer.get(), 0));
         layer->setTexture(texture, SkIRect::MakeWH(kWidth, kHeight), false);
     }
 
     SkRecord rerecord;
     SkRecorder canvas(&rerecord, kWidth, kHeight);
     GrRecordReplaceDraw(pic.get(), &canvas, layerCache, SkMatrix::I(), nullptr/*callback*/);
 
     int numLayers = count_instances_of_type<SkRecords::SaveLayer>(rerecord);
     if (doReplace) {
         REPORTER_ASSERT(r, 0 == numLayers);
     } else {
         REPORTER_ASSERT(r, 1 == numLayers);
     }
 }
 
 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(RecordReplaceDraw, r, ctxInfo) {
     test_replacements(r, ctxInfo.grContext(), true);
     test_replacements(r, ctxInfo.grContext(), false);
 }
 
 #endif