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// Copyright 2018 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_DAWN_ENGINE_DAWN_H_
#define SRC_DAWN_ENGINE_DAWN_H_
#include <cstdint>
#include <string>
#include <unordered_map>
#include <vector>
#include "dawn/dawncpp.h"
#include "src/cast_hash.h"
#include "src/command.h"
#include "src/dawn/pipeline_info.h"
#include "src/engine.h"
namespace amber {
namespace dawn {
class EngineDawn : public Engine {
public:
EngineDawn();
~EngineDawn() override;
// Engine
// Initialize with given configuration data.
Result Initialize(EngineConfig* config,
const std::vector<std::string>& features,
const std::vector<std::string>& instance_extensions,
const std::vector<std::string>& device_extensions) override;
Result Shutdown() override;
// Record info for a pipeline. The Dawn render pipeline will be created
// later. Assumes necessary shader modules have been created. A compute
// pipeline requires a compute shader. A graphics pipeline requires a vertex
// and a fragment shader.
Result CreatePipeline(Pipeline*) override;
Result DoClearColor(const ClearColorCommand* cmd) override;
Result DoClearStencil(const ClearStencilCommand* cmd) override;
Result DoClearDepth(const ClearDepthCommand* cmd) override;
Result DoClear(const ClearCommand* cmd) override;
Result DoDrawRect(const DrawRectCommand* cmd) override;
Result DoDrawArrays(const DrawArraysCommand* cmd) override;
Result DoCompute(const ComputeCommand* cmd) override;
Result DoEntryPoint(const EntryPointCommand* cmd) override;
Result DoPatchParameterVertices(
const PatchParameterVerticesCommand* cmd) override;
Result DoBuffer(const BufferCommand* cmd) override;
Result DoProcessCommands(Pipeline*) override;
Result GetFrameBufferInfo(Pipeline*,
size_t attachment_idx,
ResourceInfo* info) override;
Result GetFrameBuffer(Pipeline*,
size_t attachment_idx,
std::vector<Value>* values) override;
Result GetDescriptorInfo(Pipeline*,
const uint32_t descriptor_set,
const uint32_t binding,
ResourceInfo* info) override;
private:
// Creates a command buffer builder if it doesn't already exist.
Result CreateCommandBufferBuilderIfNeeded();
// Destroys the current command buffer builder.
void DestroyCommandBufferBuilder();
// Creates Dawn objects necessary for a render pipeline. This creates
// a framebuffer texture, a framebuffer buffer, and a command buffer
// builder. Returns a result code.
Result CreateRenderObjectsIfNeeded();
// If they don't already exist, creates the framebuffer texture for use
// on the device, the buffer on the host that will eventually hold the
// resulting pixels for use in checking expectations, and bookkeeping info
// for that host-side buffer.
Result CreateFramebufferIfNeeded();
Result SetShader(ShaderType type, const std::vector<uint32_t>& data);
::dawn::Device* device_ = nullptr; // Borrowed from the engine config.
::dawn::Queue queue_;
::dawn::CommandBufferBuilder command_buffer_builder_;
std::unordered_map<ShaderType, ::dawn::ShaderModule, CastHash<ShaderType>>
module_for_type_;
// Accumulated data for the current compute pipeline.
ComputePipelineInfo compute_pipeline_info_;
// Accumulated data for the current render pipeline.
RenderPipelineInfo render_pipeline_info_;
};
} // namespace dawn
} // namespace amber
#endif // SRC_DAWN_ENGINE_DAWN_H_
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