Initialize textures for reproducible test results.

client/deps/glbench/src/textureupdatetest.cc

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/logging.h"
 #include "base/scoped_ptr.h"
 #include "base/string_util.h"
 
 #include "main.h"
 #include "testbase.h"
@@ skipping 115 matching lines @@
   const std::string flavor_names[] = {
     "texture_update_teximage2d", "texture_update_texsubimage2d"
   };
   for (unsigned int f = 0; f < arraysize(flavors); f++) {
     flavor_ = flavors[f];
     int sizes[] = {32, 128, 256, 512, 768, 1024, 1536, 2048};
     for (unsigned int i = 0; i < arraysize(sizes); i++) {
       std::string name = "mtexel_sec_" + flavor_names[f] + "_" +
           IntToString(sizes[i]);
       width_ = height_ = sizes[i];
-      for (int i = 0; i < kNumberOfTextures; ++i)
+      for (int i = 0; i < kNumberOfTextures; ++i) {
         pixels_[i].reset(new char[width_ * height_]);
+        memset(pixels_[i].get(), 255, width_ * height_);
+      }
       RunTest(this, name.c_str(), width_ * height_, true);
     }
   }
 
   glDeleteTextures(1, &texname);
   glDeleteProgram(program_);
   return true;
 }
 
 TestBase* GetTextureUpdateTest() {
   return new TextureUpdateTest;
 }
 
 } // namespace glbench