WIP "Vertex buffers: Vertex buffer creation"
TODO: "Vertex buffers: Staging buffer" https://vulkan-tutorial.com/Vertex_buffers/Staging_buffer
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07b384a6c7
commit
612f7dc8da
2 changed files with 164 additions and 3 deletions
159
src/main.rs
159
src/main.rs
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@ -25,6 +25,21 @@ const DYNAMIC_STATES: [ffi::VkDynamicState; 2] = [
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const DEVICE_EXTENSIONS: [*const i8; 1] =
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[ffi::VK_KHR_SWAPCHAIN_EXTENSION_NAME as *const u8 as *const i8];
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const VERTICES: [math3d::Vertex; 3] = [
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math3d::Vertex {
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pos: [0.0, -0.5],
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color: [1.0, 0.0, 0.0],
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},
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math3d::Vertex {
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pos: [0.5, 0.5],
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color: [0.0, 1.0, 0.0],
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},
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math3d::Vertex {
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pos: [-0.5, 0.5],
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color: [0.0, 0.0, 1.0],
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},
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];
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fn check_validation_layer_support() -> bool {
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let mut layer_count: u32 = 0;
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unsafe {
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@ -191,6 +206,8 @@ struct VulkanApp {
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render_finished_semaphore: ffi::VkSemaphore,
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in_flight_fence: ffi::VkFence,
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framebuffer_resized: bool,
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vertex_buffer: ffi::VkBuffer,
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vertex_buffer_memory: ffi::VkDeviceMemory,
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}
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impl VulkanApp {
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@ -219,6 +236,8 @@ impl VulkanApp {
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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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framebuffer_resized: false,
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vertex_buffer: std::ptr::null_mut(),
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vertex_buffer_memory: std::ptr::null_mut(),
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}
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}
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@ -262,6 +281,7 @@ impl VulkanApp {
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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_vertex_buffer().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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@ -1379,6 +1399,17 @@ impl VulkanApp {
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);
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}
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let offsets: [ffi::VkDeviceSize; 1] = [0];
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unsafe {
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ffi::vkCmdBindVertexBuffers(
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command_buffer,
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0,
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1,
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std::ptr::addr_of!(self.vertex_buffer),
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offsets.as_ptr(),
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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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@ -1389,7 +1420,7 @@ impl VulkanApp {
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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::vkCmdDraw(command_buffer, VERTICES.len() as u32, 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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@ -1585,12 +1616,138 @@ impl VulkanApp {
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pub fn set_resize_flag(&mut self) {
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self.framebuffer_resized = true;
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}
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fn create_vertex_buffer(&mut self) -> Result<(), String> {
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let mut buffer_info: ffi::VkBufferCreateInfo = unsafe { std::mem::zeroed() };
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buffer_info.sType = ffi::VkStructureType_VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
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buffer_info.size = (std::mem::size_of::<math3d::Vertex>() * VERTICES.len()) as u64;
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buffer_info.usage = ffi::VkBufferUsageFlagBits_VK_BUFFER_USAGE_VERTEX_BUFFER_BIT;
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buffer_info.sharingMode = ffi::VkSharingMode_VK_SHARING_MODE_EXCLUSIVE;
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let result = unsafe {
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ffi::vkCreateBuffer(
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self.device,
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std::ptr::addr_of!(buffer_info),
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std::ptr::null(),
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std::ptr::addr_of_mut!(self.vertex_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 create vertex buffer!"));
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}
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let mut mem_reqs: ffi::VkMemoryRequirements = unsafe { std::mem::zeroed() };
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unsafe {
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ffi::vkGetBufferMemoryRequirements(
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self.device,
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self.vertex_buffer,
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std::ptr::addr_of_mut!(mem_reqs),
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);
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}
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let mut alloc_info: ffi::VkMemoryAllocateInfo = unsafe { std::mem::zeroed() };
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alloc_info.sType = ffi::VkStructureType_VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
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alloc_info.allocationSize = mem_reqs.size;
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alloc_info.memoryTypeIndex = self.find_memory_type(
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mem_reqs.memoryTypeBits,
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ffi::VkMemoryPropertyFlagBits_VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT
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| ffi::VkMemoryPropertyFlagBits_VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
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)?;
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let result = unsafe {
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ffi::vkAllocateMemory(
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self.device,
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std::ptr::addr_of!(alloc_info),
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std::ptr::null(),
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std::ptr::addr_of_mut!(self.vertex_buffer_memory),
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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 vertex buffer memory!"));
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}
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unsafe {
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ffi::vkBindBufferMemory(
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self.device,
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self.vertex_buffer,
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self.vertex_buffer_memory,
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0,
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);
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}
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let mut data_ptr: *mut c_void = unsafe { std::mem::zeroed() };
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unsafe {
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ffi::vkMapMemory(
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self.device,
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self.vertex_buffer_memory,
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0,
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buffer_info.size,
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0,
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std::ptr::addr_of_mut!(data_ptr),
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);
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}
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{
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let data_ptr_vertices: &mut [math3d::Vertex; 3] =
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unsafe { std::mem::transmute(data_ptr) };
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*data_ptr_vertices = VERTICES;
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}
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unsafe {
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ffi::vkUnmapMemory(self.device, self.vertex_buffer_memory);
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}
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Ok(())
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}
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fn find_memory_type(
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&mut self,
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type_filter: u32,
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properties: ffi::VkMemoryPropertyFlags,
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) -> Result<u32, String> {
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if self.physical_device.is_null() {
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return Err(String::from(
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"Cannot find memory type if physical_device is null!",
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));
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}
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let mut mem_props: ffi::VkPhysicalDeviceMemoryProperties = unsafe { std::mem::zeroed() };
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unsafe {
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ffi::vkGetPhysicalDeviceMemoryProperties(
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self.physical_device,
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std::ptr::addr_of_mut!(mem_props),
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);
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}
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for idx in 0..mem_props.memoryTypeCount {
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if (type_filter & (1 << idx)) != 0
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&& (mem_props.memoryTypes[idx as usize].propertyFlags & properties) == properties
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{
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return Ok(idx);
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}
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}
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Err(String::from("Failed to find suitable memory type!"))
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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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self.cleanup_swap_chain().unwrap();
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if !self.vertex_buffer.is_null() {
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unsafe {
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ffi::vkDestroyBuffer(self.device, self.vertex_buffer, std::ptr::null());
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}
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}
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if !self.vertex_buffer_memory.is_null() {
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unsafe {
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ffi::vkFreeMemory(self.device, self.vertex_buffer_memory, std::ptr::null());
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}
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}
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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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@ -3,8 +3,8 @@ use crate::ffi;
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#[repr(C)]
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#[derive(Copy, Clone, PartialEq, Debug)]
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pub struct Vertex {
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pos: [f32; 2],
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color: [f32; 3],
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pub pos: [f32; 2],
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pub color: [f32; 3],
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}
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impl Default for Vertex {
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@ -17,6 +17,10 @@ impl Default for Vertex {
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}
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impl Vertex {
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pub fn new(pos: [f32; 2], color: [f32; 3]) -> Self {
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Self { pos, color }
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}
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pub fn pos_offset() -> usize {
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0
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}
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