WIP "Drawing: Rendering and presentation"
Note that at this point, a Triangle is now drawn to the window. However, there are some chapters remaining in the tutorial for other details. TODO: "Drawing: Frames in flight" https://vulkan-tutorial.com/Drawing_a_triangle/Drawing/Frames_in_flight
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166
src/main.rs
166
src/main.rs
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@ -177,6 +177,9 @@ struct VulkanApp {
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swap_chain_framebuffers: Vec<ffi::VkFramebuffer>,
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command_pool: ffi::VkCommandPool,
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command_buffer: ffi::VkCommandBuffer,
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image_available_semaphore: ffi::VkSemaphore,
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render_finished_semaphore: ffi::VkSemaphore,
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in_flight_fence: ffi::VkFence,
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}
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impl VulkanApp {
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@ -201,6 +204,9 @@ impl VulkanApp {
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swap_chain_framebuffers: Vec::new(),
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command_pool: std::ptr::null_mut(),
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command_buffer: std::ptr::null_mut(),
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image_available_semaphore: std::ptr::null_mut(),
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render_finished_semaphore: std::ptr::null_mut(),
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in_flight_fence: std::ptr::null_mut(),
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}
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}
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@ -242,6 +248,7 @@ impl VulkanApp {
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self.create_framebuffers().unwrap();
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self.create_command_pool().unwrap();
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self.create_command_buffer().unwrap();
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self.create_sync_objects().unwrap();
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}
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fn create_instance(&mut self) -> Result<(), String> {
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@ -488,14 +495,19 @@ impl VulkanApp {
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panic!("ERROR: Cannot execute main loop if vk_instance is null!");
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}
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loop {
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'outer: loop {
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unsafe {
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if ffi::glfwWindowShouldClose(self.window) != 0 {
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return;
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break 'outer;
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}
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ffi::glfwPollEvents();
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self.draw_frame().unwrap();
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}
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}
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unsafe {
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ffi::vkDeviceWaitIdle(self.device);
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}
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}
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fn find_queue_families(&self, dev: ffi::VkPhysicalDevice) -> QueueFamilyIndices {
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@ -1194,6 +1206,21 @@ impl VulkanApp {
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render_pass_info.subpassCount = 1;
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render_pass_info.pSubpasses = std::ptr::addr_of!(subpass);
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let mut dependency: ffi::VkSubpassDependency = unsafe { std::mem::zeroed() };
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dependency.srcSubpass = ffi::VK_SUBPASS_EXTERNAL as u32;
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dependency.dstSubpass = 0;
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dependency.srcStageMask =
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ffi::VkPipelineStageFlagBits_VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
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dependency.srcAccessMask = 0;
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dependency.dstStageMask =
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ffi::VkPipelineStageFlagBits_VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
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dependency.dstAccessMask = ffi::VkAccessFlagBits_VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
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render_pass_info.dependencyCount = 1;
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render_pass_info.pDependencies = std::ptr::addr_of!(dependency);
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let result = unsafe {
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ffi::vkCreateRenderPass(
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self.device,
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@ -1356,10 +1383,145 @@ impl VulkanApp {
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Ok(())
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}
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fn draw_frame(&mut self) -> Result<(), String> {
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unsafe {
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ffi::vkWaitForFences(
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self.device,
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1,
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std::ptr::addr_of!(self.in_flight_fence),
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ffi::VK_TRUE,
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u64::MAX,
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);
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ffi::vkResetFences(self.device, 1, std::ptr::addr_of!(self.in_flight_fence));
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}
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let mut image_index: u32 = 0;
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unsafe {
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ffi::vkAcquireNextImageKHR(
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self.device,
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self.swap_chain,
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u64::MAX,
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self.image_available_semaphore,
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std::ptr::null_mut(),
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std::ptr::addr_of_mut!(image_index),
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);
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ffi::vkResetCommandBuffer(self.command_buffer, 0);
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self.record_command_buffer(self.command_buffer, image_index as usize)?;
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}
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let mut submit_info: ffi::VkSubmitInfo = unsafe { std::mem::zeroed() };
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submit_info.sType = ffi::VkStructureType_VK_STRUCTURE_TYPE_SUBMIT_INFO;
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let wait_stages: ffi::VkPipelineStageFlags =
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ffi::VkPipelineStageFlagBits_VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
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submit_info.waitSemaphoreCount = 1;
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submit_info.pWaitSemaphores = std::ptr::addr_of!(self.image_available_semaphore);
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submit_info.pWaitDstStageMask = std::ptr::addr_of!(wait_stages);
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submit_info.commandBufferCount = 1;
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submit_info.pCommandBuffers = std::ptr::addr_of!(self.command_buffer);
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submit_info.signalSemaphoreCount = 1;
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submit_info.pSignalSemaphores = std::ptr::addr_of!(self.render_finished_semaphore);
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let result = unsafe {
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ffi::vkQueueSubmit(
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self.graphics_queue,
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1,
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std::ptr::addr_of!(submit_info),
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self.in_flight_fence,
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)
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};
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if result != ffi::VkResult_VK_SUCCESS {
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return Err(String::from("Failed to submit draw command buffer!"));
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}
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let mut present_info: ffi::VkPresentInfoKHR = unsafe { std::mem::zeroed() };
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present_info.sType = ffi::VkStructureType_VK_STRUCTURE_TYPE_PRESENT_INFO_KHR;
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present_info.waitSemaphoreCount = 1;
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present_info.pWaitSemaphores = std::ptr::addr_of!(self.render_finished_semaphore);
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present_info.swapchainCount = 1;
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present_info.pSwapchains = std::ptr::addr_of!(self.swap_chain);
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present_info.pImageIndices = std::ptr::addr_of!(image_index);
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present_info.pResults = std::ptr::null_mut();
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unsafe {
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ffi::vkQueuePresentKHR(self.present_queue, std::ptr::addr_of!(present_info));
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}
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Ok(())
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}
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fn create_sync_objects(&mut self) -> Result<(), String> {
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let mut semaphore_info: ffi::VkSemaphoreCreateInfo = unsafe { std::mem::zeroed() };
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semaphore_info.sType = ffi::VkStructureType_VK_STRUCTURE_TYPE_SEMAPHORE_CREATE_INFO;
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let mut fence_info: ffi::VkFenceCreateInfo = unsafe { std::mem::zeroed() };
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fence_info.sType = ffi::VkStructureType_VK_STRUCTURE_TYPE_FENCE_CREATE_INFO;
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fence_info.flags = ffi::VkFenceCreateFlagBits_VK_FENCE_CREATE_SIGNALED_BIT;
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unsafe {
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if ffi::vkCreateSemaphore(
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self.device,
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std::ptr::addr_of!(semaphore_info),
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std::ptr::null(),
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std::ptr::addr_of_mut!(self.image_available_semaphore),
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) != ffi::VkResult_VK_SUCCESS
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|| ffi::vkCreateSemaphore(
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self.device,
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std::ptr::addr_of!(semaphore_info),
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std::ptr::null(),
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std::ptr::addr_of_mut!(self.render_finished_semaphore),
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) != ffi::VkResult_VK_SUCCESS
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|| ffi::vkCreateFence(
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self.device,
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std::ptr::addr_of!(fence_info),
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std::ptr::null(),
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std::ptr::addr_of_mut!(self.in_flight_fence),
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) != ffi::VkResult_VK_SUCCESS
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{
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return Err(String::from("Failed to create semaphores/fence!"));
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}
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}
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Ok(())
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}
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}
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impl Drop for VulkanApp {
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fn drop(&mut self) {
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if !self.in_flight_fence.is_null() {
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unsafe {
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ffi::vkDestroyFence(self.device, self.in_flight_fence, std::ptr::null());
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}
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}
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if !self.render_finished_semaphore.is_null() {
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unsafe {
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ffi::vkDestroySemaphore(
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self.device,
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self.render_finished_semaphore,
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std::ptr::null(),
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);
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}
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}
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if !self.image_available_semaphore.is_null() {
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unsafe {
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ffi::vkDestroySemaphore(
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self.device,
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self.image_available_semaphore,
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std::ptr::null(),
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);
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}
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}
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if !self.command_pool.is_null() {
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unsafe {
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ffi::vkDestroyCommandPool(self.device, self.command_pool, std::ptr::null());
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