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// Copyright 2019 The Amber Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SRC_VULKAN_INDEX_BUFFER_H_
#define SRC_VULKAN_INDEX_BUFFER_H_
#include <memory>
#include <vector>
#include "amber/result.h"
#include "amber/vulkan_header.h"
#include "src/format.h"
#include "src/value.h"
#include "src/vulkan/buffer.h"
namespace amber {
namespace vulkan {
class Device;
// A class providing abstraction for index buffer. Only a single
// instance of this class must exist as a member of GraphicsPipeline
// class. It must be created once when
// GraphicsPipeline::SetIndexBuffer() is called.
class IndexBuffer {
public:
explicit IndexBuffer(Device* device);
~IndexBuffer();
// Destroy |buffer_| if it is not nullptr.
void Shutdown();
// Assuming that |buffer_| is nullptr and |values| is not empty,
// it creates |buffer_| whose size is |sizeof(uint32_t) * values.size()|
// and coverts |values| as uint32 values and copies them to |buffer_|.
Result SendIndexData(VkCommandBuffer command,
const VkPhysicalDeviceMemoryProperties& properties,
const std::vector<Value>& values);
// Bind |buffer_| as index buffer if it is not nullptr.
Result BindToCommandBuffer(VkCommandBuffer command);
private:
Device* device_ = nullptr;
std::unique_ptr<Buffer> buffer_;
};
} // namespace vulkan
} // namespace amber
#endif // SRC_VULKAN_INDEX_BUFFER_H_
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