// Copyright (c) 2010 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 "gpu/command_buffer/service/buffer_manager.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace gpu {
namespace gles2 {

class BufferManagerTest : public testing::Test {
 public:
  BufferManagerTest() {
  }

 protected:
  virtual void SetUp() {
  }

  virtual void TearDown() {
  }

  BufferManager manager_;
};

TEST_F(BufferManagerTest, Basic) {
  const GLuint kBuffer1Id = 1;
  const GLsizeiptr kBuffer1Size = 123;
  const GLuint kBuffer2Id = 2;
  // Check we can create buffer.
  manager_.CreateBufferInfo(kBuffer1Id);
  // Check buffer got created.
  BufferManager::BufferInfo* info1 = manager_.GetBufferInfo(kBuffer1Id);
  ASSERT_TRUE(info1 != NULL);
  EXPECT_EQ(0u, info1->target());
  EXPECT_EQ(0, info1->size());
  EXPECT_FALSE(info1->IsDeleted());
  EXPECT_EQ(kBuffer1Id, info1->buffer_id());
  info1->set_target(GL_ELEMENT_ARRAY_BUFFER);
  EXPECT_EQ(GL_ELEMENT_ARRAY_BUFFER, info1->target());
  // Check we and set its size.
  info1->SetSize(kBuffer1Size);
  EXPECT_EQ(kBuffer1Size, info1->size());
  // Check we get nothing for a non-existent buffer.
  EXPECT_TRUE(manager_.GetBufferInfo(kBuffer2Id) == NULL);
  // Check trying to a remove non-existent buffers does not crash.
  manager_.RemoveBufferInfo(kBuffer2Id);
  // Check we can't get the buffer after we remove it.
  manager_.RemoveBufferInfo(kBuffer1Id);
  EXPECT_TRUE(manager_.GetBufferInfo(kBuffer1Id) == NULL);
}

TEST_F(BufferManagerTest, SetRange) {
  const GLuint kBufferId = 1;
  const uint8 data[] = {10, 9, 8, 7, 6, 5, 4, 3, 2, 1};
  const uint8 new_data[] = {100, 120, 110};
  manager_.CreateBufferInfo(kBufferId);
  BufferManager::BufferInfo* info = manager_.GetBufferInfo(kBufferId);
  ASSERT_TRUE(info != NULL);
  info->set_target(GL_ELEMENT_ARRAY_BUFFER);
  info->SetSize(sizeof(data));
  EXPECT_TRUE(info->SetRange(0, sizeof(data), data));
  EXPECT_TRUE(info->SetRange(sizeof(data), 0, data));
  EXPECT_FALSE(info->SetRange(sizeof(data), 1, data));
  EXPECT_FALSE(info->SetRange(0, sizeof(data) + 1, data));
}

TEST_F(BufferManagerTest, GetMaxValueForRangeUint8) {
  const GLuint kBufferId = 1;
  const uint8 data[] = {10, 9, 8, 7, 6, 5, 4, 3, 2, 1};
  const uint8 new_data[] = {100, 120, 110};
  manager_.CreateBufferInfo(kBufferId);
  BufferManager::BufferInfo* info = manager_.GetBufferInfo(kBufferId);
  ASSERT_TRUE(info != NULL);
  info->set_target(GL_ELEMENT_ARRAY_BUFFER);
  info->SetSize(sizeof(data));
  EXPECT_TRUE(info->SetRange(0, sizeof(data), data));
  GLuint max_value;
  // Check entire range succeeds.
  EXPECT_TRUE(info->GetMaxValueForRange(0, 10, GL_UNSIGNED_BYTE, &max_value));
  EXPECT_EQ(10u, max_value);
  // Check sub range succeeds.
  EXPECT_TRUE(info->GetMaxValueForRange(4, 3, GL_UNSIGNED_BYTE, &max_value));
  EXPECT_EQ(6u, max_value);
  // Check changing sub range succeeds.
  EXPECT_TRUE(info->SetRange(4, sizeof(new_data), new_data));
  EXPECT_TRUE(info->GetMaxValueForRange(4, 3, GL_UNSIGNED_BYTE, &max_value));
  EXPECT_EQ(120u, max_value);
  max_value = 0;
  EXPECT_TRUE(info->GetMaxValueForRange(0, 10, GL_UNSIGNED_BYTE, &max_value));
  EXPECT_EQ(120u, max_value);
  // Check out of range fails.
  EXPECT_FALSE(info->GetMaxValueForRange(0, 11, GL_UNSIGNED_BYTE, &max_value));
  EXPECT_FALSE(info->GetMaxValueForRange(10, 1, GL_UNSIGNED_BYTE, &max_value));
}

TEST_F(BufferManagerTest, GetMaxValueForRangeUint16) {
  const GLuint kBufferId = 1;
  const uint16 data[] = {10, 9, 8, 7, 6, 5, 4, 3, 2, 1};
  const uint16 new_data[] = {100, 120, 110};
  manager_.CreateBufferInfo(kBufferId);
  BufferManager::BufferInfo* info = manager_.GetBufferInfo(kBufferId);
  ASSERT_TRUE(info != NULL);
  info->set_target(GL_ELEMENT_ARRAY_BUFFER);
  info->SetSize(sizeof(data));
  EXPECT_TRUE(info->SetRange(0, sizeof(data), data));
  GLuint max_value;
  // Check entire range succeeds.
  EXPECT_TRUE(info->GetMaxValueForRange(0, 10, GL_UNSIGNED_SHORT, &max_value));
  EXPECT_EQ(10u, max_value);
  // Check odd offset fails for GL_UNSIGNED_SHORT.
  EXPECT_FALSE(info->GetMaxValueForRange(1, 10, GL_UNSIGNED_SHORT, &max_value));
  // Check sub range succeeds.
  EXPECT_TRUE(info->GetMaxValueForRange(8, 3, GL_UNSIGNED_SHORT, &max_value));
  EXPECT_EQ(6u, max_value);
  // Check changing sub range succeeds.
  EXPECT_TRUE(info->SetRange(8, sizeof(new_data), new_data));
  EXPECT_TRUE(info->GetMaxValueForRange(8, 3, GL_UNSIGNED_SHORT, &max_value));
  EXPECT_EQ(120u, max_value);
  max_value = 0;
  EXPECT_TRUE(info->GetMaxValueForRange(0, 10, GL_UNSIGNED_SHORT, &max_value));
  EXPECT_EQ(120u, max_value);
  // Check out of range fails.
  EXPECT_FALSE(info->GetMaxValueForRange(0, 11, GL_UNSIGNED_SHORT, &max_value));
  EXPECT_FALSE(info->GetMaxValueForRange(20, 1, GL_UNSIGNED_SHORT, &max_value));
}

}  // namespace gles2
}  // namespace gpu