"Vertex Buffers: Index buffer"

TODO: "Uniform Buffers"
At this point, the project is growing beyond drawing a single triangle.
This commit is contained in:
Stephen Seo 2024-03-19 13:30:21 +09:00
parent 05cf805c03
commit 5d431081cf

View file

@ -28,21 +28,27 @@ const DYNAMIC_STATES: [ffi::VkDynamicState; 2] = [
const DEVICE_EXTENSIONS: [*const i8; 1] =
[ffi::VK_KHR_SWAPCHAIN_EXTENSION_NAME as *const u8 as *const i8];
const VERTICES: [Vertex; 3] = [
const VERTICES: [Vertex; 4] = [
Vertex {
pos: [0.0, -0.5],
pos: [-0.5, -0.5],
color: [1.0, 0.0, 0.0],
},
Vertex {
pos: [0.5, 0.5],
pos: [0.5, -0.5],
color: [0.0, 1.0, 0.0],
},
Vertex {
pos: [-0.5, 0.5],
pos: [0.5, 0.5],
color: [0.0, 0.0, 1.0],
},
Vertex {
pos: [-0.5, 0.5],
color: [1.0, 1.0, 1.0],
},
];
const VERTEX_INDICES: [u16; 6] = [0, 1, 2, 2, 3, 0];
fn check_validation_layer_support() -> bool {
let mut layer_count: u32 = 0;
unsafe {
@ -211,6 +217,8 @@ struct VulkanApp {
framebuffer_resized: bool,
vertex_buffer: ffi::VkBuffer,
vertex_buffer_memory: ffi::VkDeviceMemory,
index_buffer: ffi::VkBuffer,
index_buffer_memory: ffi::VkDeviceMemory,
}
impl VulkanApp {
@ -241,6 +249,8 @@ impl VulkanApp {
framebuffer_resized: false,
vertex_buffer: std::ptr::null_mut(),
vertex_buffer_memory: std::ptr::null_mut(),
index_buffer: std::ptr::null_mut(),
index_buffer_memory: std::ptr::null_mut(),
}
}
@ -285,6 +295,7 @@ impl VulkanApp {
self.create_framebuffers().unwrap();
self.create_command_pool().unwrap();
self.create_vertex_buffer().unwrap();
self.create_index_buffer().unwrap();
self.create_command_buffer().unwrap();
self.create_sync_objects().unwrap();
}
@ -1400,6 +1411,12 @@ impl VulkanApp {
std::ptr::addr_of!(self.vertex_buffer),
offsets.as_ptr(),
);
ffi::vkCmdBindIndexBuffer(
command_buffer,
self.index_buffer,
0,
ffi::VkIndexType_VK_INDEX_TYPE_UINT16,
);
}
let viewport = self.create_viewport();
@ -1412,7 +1429,7 @@ impl VulkanApp {
unsafe {
ffi::vkCmdSetScissor(command_buffer, 0, 1, std::ptr::addr_of!(scissor));
ffi::vkCmdDraw(command_buffer, VERTICES.len() as u32, 1, 0, 0);
ffi::vkCmdDrawIndexed(command_buffer, VERTEX_INDICES.len() as u32, 1, 0, 0, 0);
ffi::vkCmdEndRenderPass(command_buffer);
if ffi::vkEndCommandBuffer(command_buffer) != ffi::VkResult_VK_SUCCESS {
@ -1643,7 +1660,7 @@ impl VulkanApp {
0,
std::ptr::addr_of_mut!(data_ptr),
);
let data_ptr_vertices: *mut [Vertex; 3] = std::mem::transmute(data_ptr);
let data_ptr_vertices: *mut [Vertex; VERTICES.len()] = std::mem::transmute(data_ptr);
*data_ptr_vertices = VERTICES;
ffi::vkUnmapMemory(self.device, staging_buffer_mem);
}
@ -1849,12 +1866,77 @@ impl VulkanApp {
Ok(())
}
fn create_index_buffer(&mut self) -> Result<(), String> {
let buffer_size: ffi::VkDeviceSize =
(std::mem::size_of::<u16>() * VERTEX_INDICES.len()) as u64;
let (buf, buf_mem) = self.create_buffer(
buffer_size,
ffi::VkBufferUsageFlagBits_VK_BUFFER_USAGE_TRANSFER_SRC_BIT,
ffi::VkMemoryPropertyFlagBits_VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT
| ffi::VkMemoryPropertyFlagBits_VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
)?;
let _staging_inst;
cleanup_func!(
func: move || unsafe {
ffi::vkDestroyBuffer(device_copy, buf_copy, std::ptr::null());
ffi::vkFreeMemory(device_copy, buf_mem_copy, std::ptr::null());
},
name: CleanupIdxStaging,
hold_name: _staging_inst,
var_pair: self.device, device_copy,
var_pair: buf, buf_copy,
var_pair: buf_mem, buf_mem_copy
);
let mut data_ptr: *mut c_void = std::ptr::null_mut();
unsafe {
ffi::vkMapMemory(
self.device,
buf_mem,
0,
buffer_size,
0,
std::ptr::addr_of_mut!(data_ptr),
);
let data_ptr_indices: *mut [u16; VERTEX_INDICES.len()] = std::mem::transmute(data_ptr);
*data_ptr_indices = VERTEX_INDICES;
ffi::vkUnmapMemory(self.device, buf_mem);
}
let (idx_buf, idx_buf_mem) = self.create_buffer(
buffer_size,
ffi::VkBufferUsageFlagBits_VK_BUFFER_USAGE_TRANSFER_DST_BIT
| ffi::VkBufferUsageFlagBits_VK_BUFFER_USAGE_INDEX_BUFFER_BIT,
ffi::VkMemoryPropertyFlagBits_VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT,
)?;
self.index_buffer = idx_buf;
self.index_buffer_memory = idx_buf_mem;
self.copy_buffer(buf, self.index_buffer, buffer_size)?;
Ok(())
}
}
impl Drop for VulkanApp {
fn drop(&mut self) {
self.cleanup_swap_chain().unwrap();
if !self.index_buffer.is_null() {
unsafe {
ffi::vkDestroyBuffer(self.device, self.index_buffer, std::ptr::null());
}
}
if !self.index_buffer_memory.is_null() {
unsafe {
ffi::vkFreeMemory(self.device, self.index_buffer_memory, std::ptr::null());
}
}
if !self.vertex_buffer.is_null() {
unsafe {
ffi::vkDestroyBuffer(self.device, self.vertex_buffer, std::ptr::null());