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2025-09-04 10:54:47 +08:00
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+/* Copyright (c) 2020-2024, Bradley Austin Davis
+ * Copyright (c) 2020-2024, Arm Limited
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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.
+ */
+
+#pragma once
+
+#include "api_vulkan_sample.h"
+#include "rendering/render_pipeline.h"
+#include "scene_graph/components/camera.h"
+#include "timer.h"
+
+class OpenGLWindow;
+
+#if defined(WIN32)
+using Handle = HANDLE;
+#else
+using Handle                          = int;
+constexpr Handle INVALID_HANDLE_VALUE = static_cast<Handle>(-1);
+#endif
+
+// Vertex layout for this example
+struct VertexStructure
+{
+	float pos[3];
+	float uv[2];
+	float normal[3];
+};
+
+class OffscreenContext;
+struct GLData;
+
+class OpenGLInterop : public ApiVulkanSample
+{
+  public:
+	OpenGLInterop();
+	~OpenGLInterop();
+
+	virtual bool prepare(const vkb::ApplicationOptions &options) override;
+
+	void render(float delta_time) override;
+	void build_command_buffers() override;
+	void view_changed() override;
+	void on_update_ui_overlay(vkb::Drawer &drawer) override;
+
+  private:
+	void prepare_shared_resources();
+	void generate_quad();
+	void setup_descriptor_pool();
+	void setup_descriptor_set_layout();
+	void setup_descriptor_set();
+	void prepare_pipelines();
+	void prepare_uniform_buffers();
+	void update_uniform_buffers();
+	void draw();
+
+	vkb::Timer        timer;
+	OffscreenContext *gl_context{nullptr};
+	GLData           *gl_data{nullptr};
+
+	struct ShareHandles
+	{
+		Handle memory{INVALID_HANDLE_VALUE};
+		Handle gl_ready{INVALID_HANDLE_VALUE};
+		Handle gl_complete{INVALID_HANDLE_VALUE};
+	} shareHandles;
+
+	struct SharedTexture
+	{
+		VkImage        image{VK_NULL_HANDLE};
+		VkDeviceMemory memory{VK_NULL_HANDLE};
+		VkDeviceSize   size{0};
+		VkDeviceSize   allocationSize{0};
+		VkSampler      sampler{VK_NULL_HANDLE};
+		VkImageView    view{VK_NULL_HANDLE};
+	} sharedTexture;
+
+	struct Semaphores
+	{
+		VkSemaphore gl_ready{VK_NULL_HANDLE};
+		VkSemaphore gl_complete{VK_NULL_HANDLE};
+	} sharedSemaphores;
+
+	std::unique_ptr<vkb::core::BufferC> vertex_buffer;
+	std::unique_ptr<vkb::core::BufferC> index_buffer;
+	uint32_t                            index_count;
+
+	std::unique_ptr<vkb::core::BufferC> uniform_buffer_vs;
+
+	struct UniformBufferData
+	{
+		glm::mat4 projection;
+		glm::mat4 model;
+		glm::vec4 view_pos;
+	} ubo_vs;
+
+	VkPipeline            pipeline{VK_NULL_HANDLE};
+	VkPipelineLayout      pipeline_layout{VK_NULL_HANDLE};
+	VkDescriptorSet       descriptor_set{VK_NULL_HANDLE};
+	VkDescriptorSetLayout descriptor_set_layout{VK_NULL_HANDLE};
+};
+
+std::unique_ptr<vkb::VulkanSampleC> create_open_gl_interop();