WIP "Drawing: Command Buffers"
TODO: "Drawing: Rendering and presentation"
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1 changed files with 136 additions and 8 deletions
144
src/main.rs
144
src/main.rs
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@ -175,6 +175,8 @@ struct VulkanApp {
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pipeline_layout: ffi::VkPipelineLayout,
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graphics_pipeline: ffi::VkPipeline,
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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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}
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impl VulkanApp {
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@ -197,6 +199,8 @@ impl VulkanApp {
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pipeline_layout: std::ptr::null_mut(),
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graphics_pipeline: std::ptr::null_mut(),
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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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}
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}
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@ -236,6 +240,8 @@ impl VulkanApp {
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self.create_graphics_pipeline()
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.expect("Should be able to set up graphics pipeline");
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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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}
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fn create_instance(&mut self) -> Result<(), String> {
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@ -903,13 +909,6 @@ impl VulkanApp {
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input_assembly.topology = ffi::VkPrimitiveTopology_VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
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input_assembly.primitiveRestartEnable = ffi::VK_FALSE;
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let viewport = self.create_viewport();
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let mut scissor: ffi::VkRect2D = unsafe { std::mem::zeroed() };
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scissor.offset.x = 0;
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scissor.offset.y = 0;
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scissor.extent = self.swap_chain_extent;
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let dynamic_state_info_struct = Self::create_dynamic_state_info_struct();
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let viewport_state = Self::create_viewport_state_info_struct();
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@ -1062,7 +1061,7 @@ impl VulkanApp {
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vertex_input_info
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}
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fn create_viewport(&mut self) -> ffi::VkViewport {
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fn create_viewport(&self) -> ffi::VkViewport {
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let mut viewport: ffi::VkViewport = unsafe { std::mem::zeroed() };
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viewport.x = 0.0;
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viewport.y = 0.0;
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@ -1074,6 +1073,13 @@ impl VulkanApp {
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viewport
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}
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fn create_scissor(&self) -> ffi::VkRect2D {
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ffi::VkRect2D {
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offset: ffi::VkOffset2D { x: 0, y: 0 },
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extent: self.swap_chain_extent,
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}
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}
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fn create_viewport_state_info_struct() -> ffi::VkPipelineViewportStateCreateInfo {
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let mut viewport_state: ffi::VkPipelineViewportStateCreateInfo =
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unsafe { std::mem::zeroed() };
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@ -1234,10 +1240,132 @@ impl VulkanApp {
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Ok(())
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}
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fn create_command_pool(&mut self) -> Result<(), String> {
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let indices = self.find_queue_families(self.physical_device);
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let mut pool_info: ffi::VkCommandPoolCreateInfo = unsafe { std::mem::zeroed() };
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pool_info.sType = ffi::VkStructureType_VK_STRUCTURE_TYPE_COMMAND_POOL_CREATE_INFO;
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pool_info.flags =
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ffi::VkCommandPoolCreateFlagBits_VK_COMMAND_POOL_CREATE_RESET_COMMAND_BUFFER_BIT;
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pool_info.queueFamilyIndex = indices
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.graphics_family
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.expect("indices should have graphics family idx");
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let result = unsafe {
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ffi::vkCreateCommandPool(
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self.device,
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std::ptr::addr_of!(pool_info),
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std::ptr::null(),
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std::ptr::addr_of_mut!(self.command_pool),
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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 create command pool!"));
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}
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Ok(())
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}
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fn create_command_buffer(&mut self) -> Result<(), String> {
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let mut alloc_info: ffi::VkCommandBufferAllocateInfo = unsafe { std::mem::zeroed() };
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alloc_info.sType = ffi::VkStructureType_VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
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alloc_info.commandPool = self.command_pool;
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alloc_info.level = ffi::VkCommandBufferLevel_VK_COMMAND_BUFFER_LEVEL_PRIMARY;
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alloc_info.commandBufferCount = 1;
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let result = unsafe {
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ffi::vkAllocateCommandBuffers(
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self.device,
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std::ptr::addr_of!(alloc_info),
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std::ptr::addr_of_mut!(self.command_buffer),
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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 allocate command buffers!"));
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}
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Ok(())
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}
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fn record_command_buffer(
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&mut self,
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command_buffer: ffi::VkCommandBuffer,
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image_index: usize,
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) -> Result<(), String> {
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let mut begin_info: ffi::VkCommandBufferBeginInfo = unsafe { std::mem::zeroed() };
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begin_info.sType = ffi::VkStructureType_VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
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begin_info.flags = 0;
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begin_info.pInheritanceInfo = std::ptr::null();
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let result =
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unsafe { ffi::vkBeginCommandBuffer(command_buffer, std::ptr::addr_of!(begin_info)) };
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if result != ffi::VkResult_VK_SUCCESS {
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return Err(String::from("Failed to begin recording command buffer!"));
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}
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let mut render_pass_info: ffi::VkRenderPassBeginInfo = unsafe { std::mem::zeroed() };
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render_pass_info.sType = ffi::VkStructureType_VK_STRUCTURE_TYPE_RENDER_PASS_BEGIN_INFO;
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render_pass_info.renderPass = self.render_pass;
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render_pass_info.framebuffer = self.swap_chain_framebuffers[image_index];
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render_pass_info.renderArea.offset.x = 0;
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render_pass_info.renderArea.offset.y = 0;
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render_pass_info.renderArea.extent = self.swap_chain_extent;
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let mut clear_color: ffi::VkClearValue = unsafe { std::mem::zeroed() };
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unsafe {
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clear_color.color.float32[0] = 0.0;
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clear_color.color.float32[1] = 0.0;
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clear_color.color.float32[2] = 0.0;
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clear_color.color.float32[3] = 1.0;
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}
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render_pass_info.clearValueCount = 1;
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render_pass_info.pClearValues = std::ptr::addr_of!(clear_color);
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unsafe {
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ffi::vkCmdBeginRenderPass(
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command_buffer,
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std::ptr::addr_of!(render_pass_info),
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ffi::VkSubpassContents_VK_SUBPASS_CONTENTS_INLINE,
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);
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ffi::vkCmdBindPipeline(
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command_buffer,
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ffi::VkPipelineBindPoint_VK_PIPELINE_BIND_POINT_GRAPHICS,
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self.graphics_pipeline,
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);
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}
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let viewport = self.create_viewport();
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unsafe {
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ffi::vkCmdSetViewport(command_buffer, 0, 1, std::ptr::addr_of!(viewport));
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}
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let scissor = self.create_scissor();
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unsafe {
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ffi::vkCmdSetScissor(command_buffer, 0, 1, std::ptr::addr_of!(scissor));
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ffi::vkCmdDraw(command_buffer, 3, 1, 0, 0);
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ffi::vkCmdEndRenderPass(command_buffer);
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if ffi::vkEndCommandBuffer(command_buffer) != ffi::VkResult_VK_SUCCESS {
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return Err(String::from("Failed to record command buffer!"));
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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.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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}
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}
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for framebuffer in &self.swap_chain_framebuffers {
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unsafe {
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ffi::vkDestroyFramebuffer(self.device, *framebuffer, std::ptr::null());
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