| // 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_COMMAND_BUFFER_H_ |
| #define SRC_VULKAN_COMMAND_BUFFER_H_ |
| |
| #include "amber/result.h" |
| #include "amber/vulkan_header.h" |
| |
| namespace amber { |
| namespace vulkan { |
| |
| /// Command buffer states. |
| enum class CommandBufferState : uint8_t { |
| kInitial = 0, |
| kRecording, |
| kExecutable, |
| kPending, |
| kInvalid, |
| }; |
| |
| class CommandBufferGuard; |
| class CommandPool; |
| class Device; |
| |
| /// Wrapper around a Vulkan command buffer. This is designed to not be used |
| /// directly, but should always be used through the `CommandBufferGuard` class. |
| class CommandBuffer { |
| public: |
| CommandBuffer(Device* device, CommandPool* pool); |
| ~CommandBuffer(); |
| |
| Result Initialize(); |
| VkCommandBuffer GetVkCommandBuffer() const { return command_; } |
| |
| private: |
| friend CommandBufferGuard; |
| |
| Result BeginRecording(); |
| Result SubmitAndReset(uint32_t timeout_ms); |
| |
| bool guarded_ = false; |
| |
| Device* device_ = nullptr; |
| CommandPool* pool_ = nullptr; |
| VkCommandBuffer command_ = VK_NULL_HANDLE; |
| VkFence fence_ = VK_NULL_HANDLE; |
| }; |
| |
| /// Wrapper around a `CommandBuffer`. |
| /// |
| /// Usage follows the pattern: |
| /// ``` |
| /// CommandBufferGuard guard(cb); |
| /// if (!guard.IsRecording()) |
| /// return guard.GetResult(); |
| /// ... |
| /// Result r = guard.Submit(timeout); |
| /// if (!r.IsSuccess()) |
| /// return r; |
| /// ``` |
| class CommandBufferGuard { |
| public: |
| /// Creates a command buffer guard and sets the command buffer to recording. |
| explicit CommandBufferGuard(CommandBuffer* buffer); |
| ~CommandBufferGuard(); |
| |
| /// Returns true if the command buffer was successfully set to recording. |
| bool IsRecording() const { return result_.IsSuccess(); } |
| /// Returns the result object if the command buffer recording failed. |
| Result GetResult() { return result_; } |
| |
| /// Submits and resets the internal command buffer. |
| Result Submit(uint32_t timeout_ms); |
| |
| private: |
| Result result_; |
| CommandBuffer* buffer_; |
| }; |
| |
| } // namespace vulkan |
| } // namespace amber |
| |
| #endif // SRC_VULKAN_COMMAND_BUFFER_H_ |