1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
use hal::adapter::{AdapterInfo, DeviceType};
use winapi::{
shared::{
dxgi, dxgi1_2, dxgi1_3, dxgi1_4, dxgi1_5,
guiddef::{GUID, REFIID},
winerror,
},
um::unknwnbase::IUnknown,
Interface,
};
use wio::com::ComPtr;
use std::{ffi::OsString, mem, os::windows::ffi::OsStringExt, ptr};
#[derive(Debug, Copy, Clone)]
pub(crate) enum DxgiVersion {
/// Capable of the following interfaces:
/// * IDXGIObject
/// * IDXGIDeviceSubObject
/// * IDXGIResource
/// * IDXGIKeyedMutex
/// * IDXGISurface
/// * IDXGISurface1
/// * IDXGIOutput
/// * IDXGISwapChain
/// * IDXGIFactory
/// * IDXGIDevice
/// * IDXGIFactory1
/// * IDXGIAdapter1
/// * IDXGIDevice1
Dxgi1_0,
/// Capable of the following interfaces:
/// * IDXGIDisplayControl
/// * IDXGIOutputDuplication
/// * IDXGISurface2
/// * IDXGIResource1
/// * IDXGIDevice2
/// * IDXGISwapChain1
/// * IDXGIFactory2
/// * IDXGIAdapter2
/// * IDXGIOutput1
Dxgi1_2,
/// Capable of the following interfaces:
/// * IDXGIDevice3
/// * IDXGISwapChain2
/// * IDXGIOutput2
/// * IDXGIDecodeSwapChain
/// * IDXGIFactoryMedia
/// * IDXGISwapChainMedia
/// * IDXGIOutput3
Dxgi1_3,
/// Capable of the following interfaces:
/// * IDXGISwapChain3
/// * IDXGIOutput4
/// * IDXGIFactory4
/// * IDXGIAdapter3
Dxgi1_4,
/// Capable of the following interfaces:
/// * IDXGIOutput5
/// * IDXGISwapChain4
/// * IDXGIDevice4
/// * IDXGIFactory5
Dxgi1_5,
}
type DxgiFun =
unsafe extern "system" fn(REFIID, *mut *mut winapi::ctypes::c_void) -> winerror::HRESULT;
fn create_dxgi_factory1(
func: &DxgiFun,
guid: &GUID,
) -> Result<ComPtr<dxgi::IDXGIFactory>, winerror::HRESULT> {
let mut factory: *mut IUnknown = ptr::null_mut();
let hr = unsafe { func(guid, &mut factory as *mut *mut _ as *mut *mut _) };
if winerror::SUCCEEDED(hr) {
Ok(unsafe { ComPtr::from_raw(factory as *mut _) })
} else {
Err(hr)
}
}
pub(crate) fn get_dxgi_factory(
) -> Result<(libloading::Library, ComPtr<dxgi::IDXGIFactory>, DxgiVersion), winerror::HRESULT> {
// The returned Com-pointer is only safe to use for the lifetime of the Library.
let library = libloading::Library::new("dxgi.dll").map_err(|_| -1)?;
let func: libloading::Symbol<DxgiFun> =
unsafe { library.get(b"CreateDXGIFactory1") }.map_err(|_| -1)?;
// TODO: do we even need `create_dxgi_factory2`?
if let Ok(factory) = create_dxgi_factory1(&func, &dxgi1_5::IDXGIFactory5::uuidof()) {
return Ok((library, factory, DxgiVersion::Dxgi1_5));
}
if let Ok(factory) = create_dxgi_factory1(&func, &dxgi1_4::IDXGIFactory4::uuidof()) {
return Ok((library, factory, DxgiVersion::Dxgi1_4));
}
if let Ok(factory) = create_dxgi_factory1(&func, &dxgi1_3::IDXGIFactory3::uuidof()) {
return Ok((library, factory, DxgiVersion::Dxgi1_3));
}
if let Ok(factory) = create_dxgi_factory1(&func, &dxgi1_2::IDXGIFactory2::uuidof()) {
return Ok((library, factory, DxgiVersion::Dxgi1_2));
}
if let Ok(factory) = create_dxgi_factory1(&func, &dxgi::IDXGIFactory1::uuidof()) {
return Ok((library, factory, DxgiVersion::Dxgi1_0));
}
// TODO: any reason why above would fail and this wouldnt?
match create_dxgi_factory1(&func, &dxgi::IDXGIFactory::uuidof()) {
Ok(factory) => Ok((library, factory, DxgiVersion::Dxgi1_0)),
Err(hr) => Err(hr),
}
}
fn enum_adapters1(
idx: u32,
factory: *mut dxgi::IDXGIFactory,
) -> Result<ComPtr<dxgi::IDXGIAdapter>, winerror::HRESULT> {
let mut adapter: *mut dxgi::IDXGIAdapter = ptr::null_mut();
let hr = unsafe {
(*(factory as *mut dxgi::IDXGIFactory1))
.EnumAdapters1(idx, &mut adapter as *mut *mut _ as *mut *mut _)
};
if winerror::SUCCEEDED(hr) {
Ok(unsafe { ComPtr::from_raw(adapter) })
} else {
Err(hr)
}
}
fn get_adapter_desc(adapter: *mut dxgi::IDXGIAdapter, version: DxgiVersion) -> AdapterInfo {
match version {
DxgiVersion::Dxgi1_0 => {
let mut desc: dxgi::DXGI_ADAPTER_DESC1 = unsafe { mem::zeroed() };
unsafe {
(*(adapter as *mut dxgi::IDXGIAdapter1)).GetDesc1(&mut desc);
}
let device_name = {
let len = desc.Description.iter().take_while(|&&c| c != 0).count();
let name = <OsString as OsStringExt>::from_wide(&desc.Description[..len]);
name.to_string_lossy().into_owned()
};
AdapterInfo {
name: device_name,
vendor: desc.VendorId as usize,
device: desc.DeviceId as usize,
device_type: if (desc.Flags & dxgi::DXGI_ADAPTER_FLAG_SOFTWARE) != 0 {
DeviceType::VirtualGpu
} else {
DeviceType::DiscreteGpu
},
}
}
DxgiVersion::Dxgi1_2
| DxgiVersion::Dxgi1_3
| DxgiVersion::Dxgi1_4
| DxgiVersion::Dxgi1_5 => {
let mut desc: dxgi1_2::DXGI_ADAPTER_DESC2 = unsafe { mem::zeroed() };
unsafe {
(*(adapter as *mut dxgi1_2::IDXGIAdapter2)).GetDesc2(&mut desc);
}
let device_name = {
let len = desc.Description.iter().take_while(|&&c| c != 0).count();
let name = <OsString as OsStringExt>::from_wide(&desc.Description[..len]);
name.to_string_lossy().into_owned()
};
AdapterInfo {
name: device_name,
vendor: desc.VendorId as usize,
device: desc.DeviceId as usize,
device_type: if (desc.Flags & dxgi::DXGI_ADAPTER_FLAG_SOFTWARE) != 0 {
DeviceType::VirtualGpu
} else {
DeviceType::DiscreteGpu
},
}
}
}
}
pub(crate) fn get_adapter(
idx: u32,
factory: *mut dxgi::IDXGIFactory,
version: DxgiVersion,
) -> Result<(ComPtr<dxgi::IDXGIAdapter>, AdapterInfo), winerror::HRESULT> {
let adapter = match version {
DxgiVersion::Dxgi1_0
| DxgiVersion::Dxgi1_2
| DxgiVersion::Dxgi1_3
| DxgiVersion::Dxgi1_4
| DxgiVersion::Dxgi1_5 => enum_adapters1(idx, factory)?,
};
let desc = get_adapter_desc(adapter.as_raw(), version);
Ok((adapter, desc))
}
|
