components: Add Exosphere component.

components/exo/shared_memory_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 "components/exo/buffer.h"
+#include "components/exo/shared_memory.h"
+#include "components/exo/test/exo_test_base.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/buffer_format_util.h"
+
+namespace exo {
+namespace {
+
+using SharedMemoryTest = test::ExoTestBase;
+
+scoped_ptr<SharedMemory> CreateSharedMemory(size_t size) {
+  scoped_ptr<base::SharedMemory> shared_memory(new base::SharedMemory);
+  bool rv = shared_memory->CreateAnonymous(size);
+  DCHECK(rv);
+  base::SharedMemoryHandle handle =
+      base::SharedMemory::DuplicateHandle(shared_memory->handle());
+  DCHECK(base::SharedMemory::IsHandleValid(handle));
+  return make_scoped_ptr(new SharedMemory(handle));
+}
+
+TEST_F(SharedMemoryTest, CreateBuffer) {
+  const gfx::Size buffer_size(256, 256);
+  const gfx::BufferFormat format = gfx::BufferFormat::RGBA_8888;
+
+  scoped_ptr<SharedMemory> shared_memory =
+      CreateSharedMemory(gfx::BufferSizeForBufferFormat(buffer_size, format));
+  ASSERT_TRUE(shared_memory);
+
+  // Creating a full size buffer should succeed.
+  scoped_ptr<Buffer> buffer = shared_memory->CreateBuffer(
+      buffer_size, format, 0,
+      gfx::RowSizeForBufferFormat(buffer_size.width(), format, 0));
+  EXPECT_TRUE(buffer);
+
+  // Creating a buffer for the top-left rectangle should succeed.
+  const gfx::Size top_left_buffer_size(128, 128);
+  scoped_ptr<Buffer> top_left_buffer = shared_memory->CreateBuffer(
+      top_left_buffer_size, format, 0,
+      gfx::RowSizeForBufferFormat(buffer_size.width(), format, 0));
+  EXPECT_TRUE(top_left_buffer);
+
+  // Creating a buffer for the bottom-right rectangle should succeed.
+  const gfx::Size bottom_right_buffer_size(64, 64);
+  scoped_ptr<Buffer> bottom_right_buffer = shared_memory->CreateBuffer(
+      bottom_right_buffer_size, format,
+      (buffer_size.height() - bottom_right_buffer_size.height()) *
+              gfx::RowSizeForBufferFormat(buffer_size.width(), format, 0) +
+          (buffer_size.width() - bottom_right_buffer_size.width()) * 4,
+      gfx::RowSizeForBufferFormat(buffer_size.width(), format, 0));
+  EXPECT_TRUE(bottom_right_buffer);
+}
+
+}  // namespace
+}  // namespace exo