Force time elapsed queries on certain drivers.

ui/gl/gpu_timing_unittest.cc

 // Copyright 2015 The Chromium 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 <stdint.h>
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gl/gl_context_stub_with_extensions.h"
 #include "ui/gl/gl_implementation.h"
 #include "ui/gl/gl_mock.h"
 #include "ui/gl/gpu_preference.h"
 #include "ui/gl/gpu_timing.h"
 #include "ui/gl/gpu_timing_fake.h"
 #include "ui/gl/test/gl_surface_test_support.h"
 
 namespace gfx {
 
+using ::testing::Exactly;
+using ::testing::NotNull;
+using ::testing::DoAll;
+using ::testing::Return;
+using ::testing::SetArgPointee;
+
 class GPUTimingTest : public testing::Test {
  public:
   void SetUp() override {
     setup_ = false;
     cpu_time_bounded_ = false;
   }
 
   void TearDown() override {
     if (setup_) {
       MockGLInterface::SetGLInterface(NULL);
@@ skipping 126 matching lines @@
   gpu_timing_fake_queries_.SetCurrentCPUTime(begin_cpu_time + 1);
   EXPECT_TRUE(gpu_timer->IsAvailable());
   EXPECT_EQ(0, gpu_timer->GetDeltaElapsed());
 
   int64_t start, end;
   gpu_timer->GetStartEndTimestamps(&start, &end);
   EXPECT_EQ(begin_cpu_time, start);
   EXPECT_EQ(begin_cpu_time, end);
 }
 
+TEST_F(GPUTimingTest, QueryTimestampUsingElapsedARBTest) {
+  // Test timestamp queries on platforms with GL_ARB_timer_query but still lack
+  // support for timestamp queries
+  SetupGLContext("3.2", "GL_ARB_timer_query");
+  scoped_refptr<GPUTimingClient> client = CreateGPUTimingClient();
+  scoped_ptr<GPUTimer> gpu_timer = client->CreateGPUTimer(false);
+
+  const int64_t begin_cpu_time = 123;
+  const int64_t begin_gl_time = 10 * base::Time::kNanosecondsPerMicrosecond;
+  const int64_t cpu_gl_offset = begin_gl_time - begin_cpu_time;
+  gpu_timing_fake_queries_.SetCPUGLOffset(cpu_gl_offset);
+  gpu_timing_fake_queries_.SetCurrentCPUTime(begin_cpu_time);
+
+  gpu_timing_fake_queries_.ExpectGPUTimeStampQuery(*gl_, true);
+
+  // Custom mock override to ensure the timestamp bits are 0
+  EXPECT_CALL(*gl_, GetQueryiv(GL_TIMESTAMP, GL_QUERY_COUNTER_BITS, NotNull()))
+      .Times(Exactly(1))
+      .WillRepeatedly(DoAll(SetArgPointee<2>(0), Return()));
+
+  gpu_timer->QueryTimeStamp();
+
+  gpu_timing_fake_queries_.SetCurrentCPUTime(begin_cpu_time - 1);
+  EXPECT_FALSE(gpu_timer->IsAvailable());
+
+  gpu_timing_fake_queries_.SetCurrentCPUTime(begin_cpu_time + 1);
+  EXPECT_TRUE(gpu_timer->IsAvailable());
+  EXPECT_EQ(0, gpu_timer->GetDeltaElapsed());
+
+  int64_t start, end;
+  gpu_timer->GetStartEndTimestamps(&start, &end);
+  // Force time elapsed won't be set until a query is actually attempted
+  ASSERT_TRUE(client->IsForceTimeElapsedQuery());
+  EXPECT_EQ(begin_cpu_time, start);
+  EXPECT_EQ(begin_cpu_time, end);
+}
+
 }  // namespace gpu