添加渲染管线实现及着色器文件热重载功能

.gitmodules

@@ -28,3 +28,6 @@
 [submodule "third_party/fmt"]
 	path = third_party/fmt
 	url = https://github.com/fmtlib/fmt.git
+[submodule "third_party/efsw"]
+	path = third_party/efsw
+	url = https://github.com/SpartanJ/efsw.git

CMakeLists.txt

@@ -30,6 +30,7 @@ add_subdirectory(third_party/SDL)
 add_subdirectory(third_party/spdlog)
 add_subdirectory(third_party/stb)
 add_subdirectory(third_party/yoga/yoga)
+add_subdirectory(third_party/efsw)
 
 add_subdirectory(src)
 add_subdirectory(example)

src/CMakeLists.txt

@@ -17,6 +17,7 @@ target_link_libraries(${PROJECT_NAME} PUBLIC
     stb
     fmt::fmt-header-only
     webgpu
+    efsw-static
 )
 target_link_directories(${PROJECT_NAME} PUBLIC ${Stb_INCLUDE_DIR})
 target_compile_definitions(${PROJECT_NAME} PUBLIC VULKAN_HPP_NO_EXCEPTIONS VMA_NOT_NULL= VMA_NULLABLE=)

src/render/shader/render_pipeline.cpp

@@ -0,0 +1,90 @@
+#include "render_pipeline.h"
+
+#include "shader_module.h"
+#include "core/logger.h"
+
+namespace mirai {
+	render_pipeline::render_pipeline(const std::shared_ptr<shader_module>& shader_module, wgpu::Device device) {
+		shader_module_ = shader_module;
+		device_ = device;
+	}
+
+	render_pipeline::~render_pipeline() {
+		if (render_pipeline_) {
+			render_pipeline_.release();
+		}
+		if (pipeline_layout_) {
+			pipeline_layout_.release();
+		}
+	}
+
+	bool render_pipeline::begin_rebuild_pipeline(wgpu::Device device) {
+		render_pipeline_descriptor_.setDefault();
+
+		if (!pipeline_layout_) {
+			wgpu::PipelineLayoutDescriptor pipeline_layout_descriptor{};
+			pipeline_layout_descriptor.setDefault();
+			pipeline_layout_descriptor.label = "Render pipeline layout";
+			pipeline_layout_ = device.createPipelineLayout(pipeline_layout_descriptor);
+			if (!pipeline_layout_) {
+				MIRAI_LOG_ERROR("无法创建渲染管线布局");
+				return false;
+			}
+		}
+		render_pipeline_descriptor_.label  = "Render pipeline";
+		render_pipeline_descriptor_.layout = pipeline_layout_;
+
+		wgpu::PrimitiveState primitive_state{};
+		primitive_state.setDefault();
+		primitive_state.topology = wgpu::PrimitiveTopology::TriangleList;
+		primitive_state.frontFace = wgpu::FrontFace::CCW;
+		primitive_state.cullMode = wgpu::CullMode::None;
+
+		wgpu::MultisampleState multisample_state{};
+		multisample_state.setDefault();
+		multisample_state.count = 1;
+		multisample_state.mask = 0xFFFFFFFF;
+		multisample_state.alphaToCoverageEnabled = false;
+
+		render_pipeline_descriptor_.primitive   = primitive_state;
+		render_pipeline_descriptor_.multisample = multisample_state;
+
+		shader_module_->modify_pipeline_descriptor(render_pipeline_descriptor_);
+		return true;
+	}
+
+	bool render_pipeline::end_rebuild_pipeline(wgpu::Device device) {
+		if (render_pipeline_) {
+			render_pipeline_.release();
+			render_pipeline_ = nullptr;
+		}
+		render_pipeline_ = device.createRenderPipeline(render_pipeline_descriptor_);
+		if (!render_pipeline_) {
+			MIRAI_LOG_ERROR("无法创建渲染管线");
+			return false;
+		}
+		return true;
+	}
+
+	wgpu::RenderPipeline render_pipeline::get_pipeline() {
+		process_hot_reload();
+		return render_pipeline_;
+	}
+
+	void render_pipeline::init() {
+		shader_module_->reload_shader_module();
+		begin_rebuild_pipeline(device_);
+		if (modify_descriptor_)
+			modify_descriptor_(render_pipeline_descriptor_);
+		end_rebuild_pipeline(device_);
+	}
+
+	void render_pipeline::process_hot_reload() {
+		if (shader_module_->is_need_reload()) {
+			MIRAI_LOG_INFO("渲染管线检测到着色器模块已修改，正在重新加载...");
+			init();
+			MIRAI_LOG_INFO("渲染管线重新加载完成");
+			shader_module_->process_reload();
+		}
+	}
+}

src/render/shader/render_pipeline.h

@@ -0,0 +1,35 @@
+#pragma once
+#include <webgpu/webgpu.hpp>
+
+#include "core/object.h"
+
+namespace mirai {
+	class shader_module;
+
+	class render_pipeline : public object {
+		MIRAI_OBJECT_TYPE_INFO(render_pipeline, object)
+	public:
+		render_pipeline(const std::shared_ptr<shader_module>& shader_module, wgpu::Device device);
+		~render_pipeline() override;
+
+		void set_modify_descriptor_callback(std::function<void(wgpu::RenderPipelineDescriptor&)> callback) {
+			modify_descriptor_ = std::move(callback);
+		}
+
+		[[nodiscard]] wgpu::RenderPipeline get_pipeline();
+
+		void init();
+		void process_hot_reload();
+	private:
+		bool begin_rebuild_pipeline(wgpu::Device device);
+		bool end_rebuild_pipeline(wgpu::Device device);
+
+		wgpu::Device device_;
+		wgpu::RenderPipeline render_pipeline_;
+		wgpu::PipelineLayout pipeline_layout_;
+
+		wgpu::RenderPipelineDescriptor render_pipeline_descriptor_;
+		std::shared_ptr<shader_module> shader_module_;
+		std::function<void(wgpu::RenderPipelineDescriptor&)> modify_descriptor_;
+	};
+}

src/render/shader/shader_code.cpp

@@ -0,0 +1,35 @@
+#include "shader_code.h"
+
+#include "core/logger.h"
+
+#include <fstream>
+
+namespace mirai {
+	static efsw::FileWatcher file_watcher;
+	shader_file_code::shader_file_code(std::filesystem::path file_path): file_path_(std::move(file_path)) {
+		// 监听文件是否被修改
+		file_watcher.addWatch(file_path_.parent_path().string(), this, false);
+		file_watcher.watch();
+	}
+
+	shader_file_code::~shader_file_code() {
+		file_watcher.removeWatch(file_path_.parent_path().string());
+	}
+
+	std::string shader_file_code::get_code() const {
+		std::ifstream shader_file(file_path_, std::ios::in);
+		if (!shader_file.is_open()) {
+			MIRAI_LOG_ERROR("无法打开着色器文件: {}", file_path_.string());
+			return "";
+		}
+		std::string shader_code((std::istreambuf_iterator<char>(shader_file)), std::istreambuf_iterator<char>());
+		return shader_code;
+	}
+
+	void shader_file_code::handleFileAction(efsw::WatchID watchid, const std::string& dir, const std::string& filename,
+		efsw::Action action, std::string oldFilename) {
+		// 先更新路径
+		file_path_ = std::filesystem::path(dir) / filename;
+		mark_dirty();
+	}
+}

src/render/shader/shader_code.h

@@ -0,0 +1,71 @@
+#pragma once
+
+#include <string>
+#include <filesystem>
+
+#include "efsw/efsw.hpp"
+#include "render/webgpu-raii.hpp"
+#include "core/object.h"
+
+namespace mirai {
+	class shader_code : public object {
+		MIRAI_OBJECT_TYPE_INFO(shader_code, object)
+	public:
+		virtual ~shader_code() = default;
+		[[nodiscard]] virtual std::string get_code() const = 0;
+
+		virtual std::string get_name() const {
+			return "Unnamed Shader Code";
+		}
+		virtual bool is_need_reload() const { return is_dirty.load(); }
+
+		void process_reload() {
+			is_dirty = false;
+		}
+	protected:
+		void mark_dirty() {
+			is_dirty = true;
+		}
+		std::atomic_bool is_dirty{ false };
+	};
+
+	class shader_file_code : public shader_code, public efsw::FileWatchListener {
+		MIRAI_OBJECT_TYPE_INFO(shader_file_code, shader_code)
+	public:
+		explicit shader_file_code(std::filesystem::path file_path);
+		~shader_file_code() override;
+
+		[[nodiscard]] std::string get_code() const override;
+		std::string get_name() const override {
+			return file_path_.filename().string();
+		}
+	protected:
+		void handleFileAction(efsw::WatchID watchid, const std::string& dir, const std::string& filename, efsw::Action action, std::string oldFilename) override;
+	private:
+		std::filesystem::path file_path_;
+	};
+
+	class shader_string_code : public shader_code {
+		MIRAI_OBJECT_TYPE_INFO(shader_string_code, shader_code)
+	public:
+		explicit shader_string_code(std::string code)
+			: code_(std::move(code)) {}
+
+		void set_code(const std::string& new_code) {
+			code_ = new_code;
+			mark_dirty();
+		}
+		[[nodiscard]] std::string get_code() const override {
+			return code_;
+		}
+		void set_name(const std::string& name) {
+			name_ = name;
+		}
+		std::string get_name() const override {
+			return name_.empty() ? "String Shader Code" : name_;
+		}
+	private:
+		std::string code_;
+		std::string name_;
+	};
+}

src/render/shader/shader_entry_point.cpp

@@ -0,0 +1,69 @@
+#include "shader_entry_point.h"
+
+#include <regex>
+
+#include "shader_module.h"
+#include "core/logger.h"
+
+namespace mirai {
+	bool shader_entry_point::auto_set_entry_point_name(std::string_view shader_code) {
+		if (auto entry_name_opt = get_entry_name(std::string(shader_code), get_stage_name())) {
+			set_entry_point_name(*entry_name_opt);
+			return true;
+		}
+		return false;
+	}
+
+	void shader_entry_point::modify_pipeline_descriptor(const std::shared_ptr<shader_module> sm,
+		wgpu::RenderPipelineDescriptor& descriptor) {
+		if (entry_point_name_.empty()) {
+			if (!auto_set_entry_point_name(sm->get_code())) {
+				MIRAI_LOG_WARN("无法为阶段 {} 自动设置入口点名称，请手动设置。", get_stage_name());
+			}
+		}
+	}
+
+	std::optional<std::string> shader_entry_point::get_entry_name(const std::string& code_str, std::string_view stage) const {
+		// 查找类似 "@vertex fn main_vs(" 的模式
+		std::regex entry_point_regex(
+			"@" + std::string(stage) + R"(\s+fn\s+([a-zA-Z_][a-zA-Z0-9_]*)\s*\()"
+		);
+
+		std::smatch match;
+		// 使用cbegin()和cend()来安全地搜索std::string
+		if (std::regex_search(code_str.cbegin(), code_str.cend(), match, entry_point_regex)) {
+			// match[0] 是整个匹配的字符串 (例如 "@vertex fn main_vs(")
+			// match[1] 是第一个捕获组 (我们想要的函数名 "main_vs")
+			if (match.size() >= 2) {
+				return match[1].str();
+			}
+		}
+		return std::nullopt;
+	}
+
+	void shader_entry_point_vertex::modify_pipeline_descriptor(std::shared_ptr<shader_module> sm,
+		wgpu::RenderPipelineDescriptor& descriptor) {
+		shader_entry_point::modify_pipeline_descriptor(sm, descriptor);
+
+		wgpu::VertexState vertex_state;
+		vertex_state.setDefault();
+		vertex_state.module    = sm->get_shader_module();
+		vertex_state.entryPoint = entry_point_name_.c_str();
+
+		descriptor.vertex = vertex_state;
+	}
+
+	void shader_entry_point_fragment::modify_pipeline_descriptor(std::shared_ptr<shader_module> sm,
+	                                                             wgpu::RenderPipelineDescriptor& descriptor) {
+		shader_entry_point::modify_pipeline_descriptor(sm, descriptor);
+		fragment_state_.setDefault();
+		fragment_state_.module        = sm->get_shader_module();
+		fragment_state_.entryPoint    = entry_point_name_.c_str();
+		fragment_state_.targetCount   = static_cast<uint32_t>(color_target_states_.size());
+		fragment_state_.targets       = color_target_states_.data();
+		fragment_state_.constantCount = static_cast<uint32_t>(constant_entries_.size());
+		fragment_state_.constants     = constant_entries_.data();
+
+		descriptor.fragment = &fragment_state_;
+	}
+}

src/render/shader/shader_entry_point.h

@@ -0,0 +1,67 @@
+#pragma once
+
+#include <string_view>
+#include <string>
+#include <optional>
+
+#include <webgpu/webgpu.hpp>
+
+#include "core/object.h"
+
+namespace mirai {
+	class shader_module;
+
+	class shader_entry_point : public object {
+		MIRAI_OBJECT_TYPE_INFO(shader_entry_point, object)
+	public:
+		virtual      ~shader_entry_point() = default;
+		virtual bool auto_set_entry_point_name(std::string_view shader_code);
+
+		[[nodiscard]] std::string_view get_entry_point_name() const {
+			return entry_point_name_;
+		}
+		void set_entry_point_name(std::string_view shader_module) {
+			entry_point_name_ = shader_module;
+		}
+		virtual void modify_pipeline_descriptor(std::shared_ptr<shader_module> sm, wgpu::RenderPipelineDescriptor& descriptor);
+	protected:
+		std::optional<std::string> get_entry_name(const std::string& code_str, std::string_view stage) const;
+		virtual std::string_view get_stage_name() const = 0;
+		std::string entry_point_name_;
+	};
+
+	class shader_entry_point_vertex : public shader_entry_point {
+		MIRAI_OBJECT_TYPE_INFO(shader_entry_point_vertex, shader_entry_point)
+	public:
+		void modify_pipeline_descriptor(std::shared_ptr<shader_module> sm, wgpu::RenderPipelineDescriptor& descriptor) override;
+	protected:
+		std::string_view get_stage_name() const override {
+			return "vertex";
+		}
+	};
+
+	class shader_entry_point_fragment : public shader_entry_point {
+		MIRAI_OBJECT_TYPE_INFO(shader_entry_point_fragment, shader_entry_point)
+	public:
+		// 添加颜色目标状态 !注意不要存储这个对象, 因为这个对象地址随时会被改变!
+		auto& add_color_target_state() {
+			auto& out = color_target_states_.emplace_back();
+			out.setDefault();
+			return out;
+		}
+		// 添加常量条目 !注意不要存储这个对象, 因为这个对象地址随时会被改变!
+		auto& add_constant_entry() {
+			auto& out = constant_entries_.emplace_back();
+			out.setDefault();
+			return out;
+		}
+		void modify_pipeline_descriptor(std::shared_ptr<shader_module> sm, wgpu::RenderPipelineDescriptor& descriptor) override;
+	protected:
+		std::string_view get_stage_name() const override {
+			return "fragment";
+		}
+		wgpu::FragmentState fragment_state_;
+		std::vector<wgpu::ColorTargetState> color_target_states_;
+		std::vector<wgpu::ConstantEntry> constant_entries_;
+	};
+}

src/render/shader/shader_manager.cpp

@@ -0,0 +1,5 @@
+#include "shader_manager.h"
+
+namespace mirai {
+
+}

src/render/shader/shader_manager.h

@@ -0,0 +1,7 @@
+#pragma once
+
+namespace mirai {
+	class shader_manager {
+
+	};
+}

src/render/shader/shader_module.cpp

@@ -0,0 +1,59 @@
+#include "shader_module.h"
+
+#include "shader_code.h"
+#include "core/logger.h"
+
+#include <regex>
+
+#include "shader_entry_point.h"
+
+namespace mirai {
+	shader_module::shader_module(const wgpu::Device& device, std::shared_ptr<shader_code> code) {
+		if (!code) {
+			throw std::runtime_error("shader_module：代码为空");
+		}
+		device_ = device;
+		code_   = std::move(code);
+	}
+
+	shader_module::~shader_module() {
+		if (shader_module_)
+			shader_module_.release();
+	}
+
+	void shader_module::modify_pipeline_descriptor(wgpu::RenderPipelineDescriptor& descriptor) {
+		const auto p = shared_this();
+		for (const auto& entry_point : entry_points_) {
+			entry_point->modify_pipeline_descriptor(p, descriptor);
+		}
+	}
+
+	void shader_module::reload_shader_module() {
+		MIRAI_LOG_INFO("着色器 {} 开始热重载", code_->get_name());
+		std::string shader_code = code_->get_code();
+		if (shader_code.empty()) {
+			MIRAI_LOG_WARN("着色器代码是空的，无法创建着色器模块。");
+			return;
+		}
+		if (shader_module_) {
+			shader_module_.release();
+			shader_module_ = nullptr;
+		}
+		auto shader_name = "Shader Module: " + code_->get_name();
+		wgpu::ShaderModuleWGSLDescriptor wgsl_desc{};
+		wgsl_desc.setDefault();
+		wgsl_desc.code = shader_code.c_str();
+
+		wgpu::ShaderModuleDescriptor shader_module_desc{};
+		shader_module_desc.setDefault();
+		shader_module_desc.label = shader_name.c_str();
+		shader_module_desc.nextInChain = &wgsl_desc.chain;
+
+		shader_module_ = device_.createShaderModule(shader_module_desc);
+		if (!shader_module_) {
+			MIRAI_LOG_ERROR("无法创建着色器模块 {}", code_->get_name());
+			return;
+		}
+		MIRAI_LOG_INFO("着色器 {} 热重载完成", code_->get_name());
+	}
+}

src/render/shader/shader_module.h

@@ -0,0 +1,35 @@
+#pragma once
+
+#include <filesystem>
+
+#include "shader_code.h"
+#include "core/object.h"
+#include "render/webgpu-raii.hpp"
+
+namespace mirai {
+	class shader_entry_point;
+	class shader_code;
+
+	class shader_module : public object {
+		MIRAI_OBJECT_TYPE_INFO(shader_module, object);
+	public:
+		shader_module(const wgpu::Device& device, std::shared_ptr<shader_code> code);
+		~shader_module() override;
+
+		void add_entry_point(const std::shared_ptr<shader_entry_point>& entry_point) {
+			entry_points_.push_back(entry_point);
+		}
+
+		void modify_pipeline_descriptor(wgpu::RenderPipelineDescriptor& descriptor);
+		void reload_shader_module();
+		auto get_shader_module() const { return shader_module_; }
+		auto get_code() const { return code_->get_code(); }
+		auto is_need_reload() const { return code_->is_need_reload(); }
+		void process_reload() const { code_->process_reload(); }
+	private:
+		wgpu::Device device_;
+		wgpu::ShaderModule shader_module_;
+		std::vector<std::shared_ptr<shader_entry_point>> entry_points_;
+		std::shared_ptr<shader_code> code_;
+	};
+}

src/render/wgpu_context.cpp

@@ -5,83 +5,29 @@
 #include <filesystem>
 #include <fstream>
 
+#include "core/object.h"
+#include "shader/render_pipeline.h"
+#include "shader/shader_code.h"
+#include "shader/shader_entry_point.h"
+#include "shader/shader_module.h"
+
 namespace mirai {
 	void wgpu_context::test_shader() {
 		std::filesystem::path shader_path = R"(F:\Projects\mirai\src\render\test_shader_code.wgsl)";
-		std::ifstream shader_file(shader_path, std::ios::in);
+		auto code = make_obj<shader_file_code>(shader_path);
-		if (!shader_file.is_open()) {
+		auto sm = make_obj<shader_module>(wgpu_device_, code);
-			MIRAI_LOG_ERROR("无法打开测试着色器文件: {}", shader_path.string());
-			return;
-		}
-		std::string shader_code((std::istreambuf_iterator<char>(shader_file)), std::istreambuf_iterator<char>());
-		MIRAI_LOG_INFO("测试着色器代码:\n{}", shader_code);
 
-		wgpu::ShaderModuleWGSLDescriptor wgpu_shader_module_descriptor{};
+		auto vertex_entry = make_obj<shader_entry_point_vertex>();
-		wgpu_shader_module_descriptor.setDefault();
+		auto frga_entry = make_obj<shader_entry_point_fragment>();
-		wgpu_shader_module_descriptor.code = shader_code.c_str();
+		auto& color_target = frga_entry->add_color_target_state();
+		color_target.format = wgpu::TextureFormat::BGRA8Unorm;
+		color_target.writeMask = wgpu::ColorWriteMask::All;
 
-		wgpu::ShaderModuleDescriptor shader_module_descriptor{};
+		sm->add_entry_point(vertex_entry);
-		shader_module_descriptor.setDefault();
+		sm->add_entry_point(frga_entry);
-		shader_module_descriptor.label = "Test shader module";
-		shader_module_descriptor.nextInChain = &wgpu_shader_module_descriptor.chain;
 
-		wgpu::ShaderModule shader_module = get_device().createShaderModule(shader_module_descriptor);
+		render_pipeline_ = make_obj<render_pipeline>(sm, wgpu_device_);
-		if (!shader_module) {
+		render_pipeline_->init();
-			MIRAI_LOG_ERROR("无法创建测试着色器模块");
-			return;
-		}
-		MIRAI_LOG_INFO("测试着色器模块创建成功");
-
-		wgpu::ColorTargetState color_target_state{};
-		color_target_state.setDefault();
-		color_target_state.format = wgpu::TextureFormat::BGRA8Unorm;
-		color_target_state.writeMask = wgpu::ColorWriteMask::All;
-
-		wgpu::PrimitiveState primitive_state{};
-		primitive_state.setDefault();
-		primitive_state.topology = wgpu::PrimitiveTopology::TriangleList;
-		primitive_state.frontFace = wgpu::FrontFace::CCW;
-		primitive_state.cullMode = wgpu::CullMode::None;
-
-		wgpu::MultisampleState multisample_state{};
-		multisample_state.setDefault();
-		multisample_state.count = 1;
-		multisample_state.mask = 0xFFFFFFFF;
-		multisample_state.alphaToCoverageEnabled = false;
-
-		wgpu::VertexState vertex_state{};
-		vertex_state.setDefault();
-		vertex_state.module = shader_module;
-		vertex_state.entryPoint = "vs_main";
-
-		wgpu::FragmentState fragment_state{};
-		fragment_state.setDefault();
-		fragment_state.module = shader_module;
-		fragment_state.entryPoint = "fs_main";
-		fragment_state.targetCount = 1;
-		fragment_state.targets = &color_target_state;
-
-		wgpu::PipelineLayoutDescriptor pipeline_layout_descriptor{};
-		pipeline_layout_descriptor.setDefault();
-		pipeline_layout_descriptor.label = "Test pipeline layout";
-		wgpu::PipelineLayout pipeline_layout = get_device().createPipelineLayout(pipeline_layout_descriptor);
-		if (!pipeline_layout) {
-			MIRAI_LOG_ERROR("无法创建测试管线布局");
-			return;
-		}
-		wgpu::RenderPipelineDescriptor render_pipeline_descriptor{};
-		render_pipeline_descriptor.setDefault();
-		render_pipeline_descriptor.label = "Test render pipeline";
-		render_pipeline_descriptor.layout = pipeline_layout;
-		render_pipeline_descriptor.vertex = vertex_state;
-		render_pipeline_descriptor.fragment = &fragment_state;
-		render_pipeline_descriptor.primitive = primitive_state;
-		render_pipeline_descriptor.multisample = multisample_state;
-		render_pipeline_ = get_device().createRenderPipeline(render_pipeline_descriptor);
-		if (!render_pipeline_) {
-			MIRAI_LOG_ERROR("无法创建测试渲染管线");
-			return;
-		}
 	}
 
 	bool wgpu_context::setup() {

src/render/wgpu_context.h

@@ -2,6 +2,8 @@
 #include "render/webgpu-raii.hpp"
 
 namespace mirai {
+	class render_pipeline;
+
 	class wgpu_context {
 	public:
 		static auto& instance() {
@@ -30,6 +32,6 @@ namespace mirai {
 		wgpu_context() = default;
 		wgpu::Instance wgpu_instance_;
 		wgpu::Device wgpu_device_;
-		wgpu::RenderPipeline render_pipeline_;
+		std::shared_ptr<render_pipeline> render_pipeline_;
 	};
 }

src/window/window.cpp

@@ -7,6 +7,7 @@
 
 #include "core/logger.h"
 #include "render/wgpu_context.h"
+#include "render/shader/render_pipeline.h"
 
 namespace mirai {
 	void_result_t window::make_window(window_config config) {
@@ -65,7 +66,7 @@ namespace mirai {
 		render_pass_descriptor.colorAttachments     = &color_attachment;
 
 		wgpu::raii::RenderPassEncoder render_pass = encoder->beginRenderPass(render_pass_descriptor);
-		render_pass->setPipeline(pipeline);
+		render_pass->setPipeline(pipeline->get_pipeline());
 		render_pass->draw(3, 1, 0, 0);
 		render_pass->end();