2023-01-31 15:30:11 +11:00
|
|
|
use std::ops::Range;
|
2023-02-01 09:50:47 +11:00
|
|
|
use windows::Win32::Graphics::Direct3D12::{D3D12_CONSTANT_BUFFER_VIEW_DESC, D3D12_CPU_PAGE_PROPERTY_UNKNOWN, D3D12_HEAP_FLAG_NONE, D3D12_HEAP_PROPERTIES, D3D12_HEAP_TYPE_UPLOAD, D3D12_MEMORY_POOL_UNKNOWN, D3D12_RANGE, D3D12_RESOURCE_DESC, D3D12_RESOURCE_DIMENSION_BUFFER, D3D12_RESOURCE_STATE_GENERIC_READ, D3D12_TEXTURE_LAYOUT_ROW_MAJOR, ID3D12Device, ID3D12Resource};
|
2023-01-31 15:30:11 +11:00
|
|
|
use windows::Win32::Graphics::Dxgi::Common::DXGI_SAMPLE_DESC;
|
|
|
|
use crate::error;
|
|
|
|
use crate::error::assume_d3d12_init;
|
|
|
|
|
|
|
|
pub struct D3D12ConstantBuffer {
|
|
|
|
buffer: D3D12Buffer,
|
|
|
|
desc: D3D12_CONSTANT_BUFFER_VIEW_DESC,
|
|
|
|
}
|
|
|
|
|
|
|
|
pub struct D3D12Buffer {
|
|
|
|
handle: ID3D12Resource,
|
|
|
|
size: usize
|
|
|
|
}
|
|
|
|
|
|
|
|
pub struct D3D12BufferMapHandle<'a> {
|
|
|
|
pub slice: &'a mut [u8],
|
|
|
|
pub handle: &'a ID3D12Resource,
|
|
|
|
}
|
|
|
|
|
|
|
|
impl<'a> Drop for D3D12BufferMapHandle<'a> {
|
|
|
|
fn drop(&mut self) {
|
|
|
|
unsafe {
|
|
|
|
self.handle.Unmap(0, None)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
impl D3D12Buffer {
|
|
|
|
pub fn new(device: &ID3D12Device, size: usize) -> error::Result<D3D12Buffer> {
|
|
|
|
unsafe {
|
|
|
|
let mut buffer: Option<ID3D12Resource> = None;
|
|
|
|
device.CreateCommittedResource(
|
|
|
|
&D3D12_HEAP_PROPERTIES {
|
|
|
|
Type: D3D12_HEAP_TYPE_UPLOAD,
|
|
|
|
CPUPageProperty: D3D12_CPU_PAGE_PROPERTY_UNKNOWN,
|
|
|
|
MemoryPoolPreference: D3D12_MEMORY_POOL_UNKNOWN,
|
|
|
|
..Default::default()
|
|
|
|
},
|
|
|
|
D3D12_HEAP_FLAG_NONE,
|
|
|
|
&D3D12_RESOURCE_DESC {
|
|
|
|
Dimension: D3D12_RESOURCE_DIMENSION_BUFFER,
|
|
|
|
Width: size as u64,
|
|
|
|
Height: 1,
|
|
|
|
DepthOrArraySize: 1,
|
|
|
|
MipLevels: 1,
|
|
|
|
Layout: D3D12_TEXTURE_LAYOUT_ROW_MAJOR,
|
|
|
|
SampleDesc: DXGI_SAMPLE_DESC {
|
|
|
|
Count: 1,
|
|
|
|
Quality: 0
|
|
|
|
},
|
|
|
|
..Default::default()
|
|
|
|
},
|
|
|
|
D3D12_RESOURCE_STATE_GENERIC_READ,
|
|
|
|
None,
|
|
|
|
&mut buffer
|
|
|
|
)?;
|
|
|
|
|
|
|
|
assume_d3d12_init!(buffer, "CreateCommittedResource");
|
|
|
|
|
|
|
|
Ok(D3D12Buffer {
|
|
|
|
handle: buffer,
|
|
|
|
size
|
|
|
|
})
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn gpu_address(&self) -> u64 {
|
|
|
|
unsafe {
|
|
|
|
self.handle.GetGPUVirtualAddress()
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn into_raw(self) -> ID3D12Resource {
|
|
|
|
self.handle
|
|
|
|
}
|
|
|
|
|
|
|
|
pub fn map(&mut self, range: Option<Range<usize>>) -> error::Result<D3D12BufferMapHandle> {
|
|
|
|
let (range, size) = range.map(|range| {
|
|
|
|
(D3D12_RANGE {
|
|
|
|
Begin: range.start,
|
|
|
|
End: range.end
|
|
|
|
}, range.end - range.start)
|
|
|
|
}).unwrap_or((D3D12_RANGE {
|
|
|
|
Begin: 0,
|
|
|
|
End: 0
|
|
|
|
}, self.size));
|
|
|
|
|
|
|
|
unsafe {
|
|
|
|
let mut ptr = std::ptr::null_mut();
|
|
|
|
self.handle.Map(0, Some(&range), Some(&mut ptr))?;
|
|
|
|
let slice = std::slice::from_raw_parts_mut(ptr.cast(), size);
|
|
|
|
Ok(D3D12BufferMapHandle {
|
|
|
|
handle: &self.handle,
|
|
|
|
slice,
|
|
|
|
})
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
impl D3D12ConstantBuffer {
|
|
|
|
pub fn new(buffer: D3D12Buffer) -> D3D12ConstantBuffer {
|
|
|
|
unsafe {
|
|
|
|
let desc = D3D12_CONSTANT_BUFFER_VIEW_DESC {
|
|
|
|
BufferLocation: buffer.handle.GetGPUVirtualAddress(),
|
|
|
|
SizeInBytes: buffer.size as u32,
|
|
|
|
};
|
|
|
|
|
|
|
|
D3D12ConstantBuffer {
|
|
|
|
buffer,
|
|
|
|
desc,
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|