mirror of
https://github.com/nomi-san/parsec-vdd.git
synced 2026-08-07 13:50:45 +00:00
Nguyen Duy
200 lines
7.5 KiB
Markdown
200 lines
7.5 KiB
Markdown
<img align="left" src="https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSxBsVvpMSFpgenJxcoNf9IYCxhAL9EbkFPYMsJV3BMoHFfLKE9ZBJiZDHtcTACUyr2PsA&usqp=CAU" width="240px">
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# parsec-vdd
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✨ Standalone **Parsec VDD**, create a virtual super display without **Parsec**, upto **4K 2160p@240hz**.<br>
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<br>
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## About
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This project introduces a standalone solution for creating a virtual display by using [Parsec VDD](https://support.parsec.app/hc/en-us/articles/4422939339789-Overview-Prerequisites-and-Installation), without relying on the [Parsec app](https://parsec.app/).
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> "**Parsec VDD** (Virtual Display Driver) is a perfect software driver developed by Parsec. It utilizes the [Idd/cx API](https://learn.microsoft.com/en-us/windows-hardware/drivers/display/indirect-display-driver-model-overview) (Indirect Display Driver) to create a virtual display on a computer. This virtual display is particularly useful in situations where a physical monitor may not be available or when additional screens are desired.
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> One of the notable features of Parsec VDD is its support for a wide range of [resolutions and refresh rates](#supported-resolutions), including up to 240 Hz. This makes it well-suited for gaming, as it can provide a high-quality visual experience. It enables users to simulate the presence of additional screens or work without a physical monitor, enhancing flexibility and customization in display management."
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How does it compare to other IDDs?
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- There was an [usbmmidd_v2](https://www.amyuni.com/forum/viewtopic.php?t=3030), but it's built for a simple virtual display with limited resolutions and refresh rates.
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- There are many open source repos, but you could not get signed drivers and perfect gaming solution.
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- https://github.com/roshkins/IddSampleDriver
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- https://github.com/fufesou/RustDeskIddDriver
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- https://github.com/douglascgh/IndirectDisplay
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- https://github.com/MolotovCherry/virtual-display-rs
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If you need an application, check out this repo: https://github.com/KtzeAbyss/Easy-Virtual-Display
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<br>
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## Getting started
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Download and install **Parsec Virtual Display Driver**, just pick one:
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- [parsec-vdd-v0.37](https://builds.parsec.app/vdd/parsec-vdd-0.37.0.0.exe)
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- [parsec-vdd-v0.38](https://builds.parsec.app/vdd/parsec-vdd-0.38.0.0.exe) (recommended)
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- [parsec-vdd-v0.41](https://builds.parsec.app/vdd/parsec-vdd-0.41.0.0.exe)
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<br>
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Use this GUID interface to obtain the device handle.
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```cpp
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const GUID PARSEC_VDD_DEVINTERFACE = \
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{ 0x00b41627, 0x04c4, 0x429e, { 0xa2, 0x6e, 0x02, 0x65, 0xcf, 0x50, 0xc8, 0xfa } };
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HANDLE device = OpenDeviceHandle(PARSEC_VDD_DEVINTERFACE);
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```
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- Try this function to create your `OpenDeviceHandle(GUID)`: [fc152f42@fufesou/RustDeskIddDriver](https://github.com/fufesou/RustDeskIddDriver/blob/fc152f4282cc167b0bb32aa12c97c90788f32c3d/RustDeskIddApp/IddController.c#L722)
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- Or hard code 😀 with this file path `\\?\root#display#%(DISPLAY_INDEX)#{00b41627-04c4-429e-a26e-0265cf50c8fa}`
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<br>
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Here's the way to control the VDD:
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```cpp
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enum VddCtlCode {
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IOCTL_VDD_CONNECT = 0x22A008,
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IOCTL_VDD_ADD = 0x22E004,
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IOCTL_VDD_UPDATE = 0x22A00C,
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};
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void VddIoCtl(HANDLE vdd, VddCtlCode code) {
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BYTE InBuffer[32]{};
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int OutBuffer = 0;
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OVERLAPPED Overlapped{};
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DWORD NumberOfBytesTransferred;
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Overlapped.hEvent = CreateEventW(NULL, NULL, NULL, NULL);
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DeviceIoControl(vdd, code, InBuffer, _countof(InBuffer), &OutBuffer, sizeof(OutBuffer), NULL, &Overlapped);
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GetOverlappedResult(vdd, &Overlapped, &NumberOfBytesTransferred, TRUE);
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if (Overlapped.hEvent && Overlapped.hEvent != INVALID_HANDLE_VALUE)
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CloseHandle(Overlapped.hEvent);
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}
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```
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And here is the pseudo-code for the VDD manipulation:
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```cpp
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void VddThread(HANDLE vdd, bool &running) {
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// Plug in monitor.
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VddIoCtl(vdd, IOCTL_VDD_CONNECT);
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VddIoCtl(vdd, IOCTL_VDD_UPDATE);
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VddIoCtl(vdd, IOCTL_VDD_ADD);
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VddIoCtl(vdd, IOCTL_VDD_UPDATE);
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// Keep monitor connection.
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for (running = true; running; ) {
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Sleep(100);
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VddIoCtl(vdd, IOCTL_VDD_UPDATE);
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}
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}
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bool PlugInMonitor(HANDLE &vdd, HANDLE &vddThread, bool &running) {
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char devpath[1024];
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for (int idx = 0; idx < 5; idx++) {
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// Hardcode device path.
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sprintf(devpath, "\\\\?\\root#display#000%d#%s", idx, "{00b41627-04c4-429e-a26e-0265cf50c8fa}");
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vdd = CreateFileA(devpath, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL);
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if (vdd && vdd != INVALID_HANDLE_VALUE) {
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vddThread = CreateThread(VddThread);
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return true;
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}
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}
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return false;
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}
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void PlugOutMonitor(HANDLE vdd, HANDLE vddThread, bool &running) {
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running = false;
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WaitForSingleObject(vddThread, INFINITE);
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// Reconnect to unplug monitor.
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VddIoCtl(vdd, IOCTL_VDD_CONNECT);
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CloseHandle(vdd);
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}
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```
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A simple usage, see [demo.cc](./demo.cc) to learn more.
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```cpp
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int main()
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{
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bool running;
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HANDLE vdd, vddThread;
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if (PlugInMonitor(vdd, vddThread, running)) {
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Sleep(5000);
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PlugOutMonitor(vdd, vddThread, running);
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}
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}
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```
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<br>
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## Supported resolutions
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Notes:
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- Low GPUs, e.g GTX 1650 will not support the highest DCI 4K.
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- All these below resolutions are compatible with all refresh rates 24/30/60/144/240 Hz.
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| Resolution | Common name | Aspect ratio
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| - | :-: | :-:
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| 4096 x 2160 | DCI 4K
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| 3840 x 2160 | 4K UHD | 16:9
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| 3840 x 1600 | UltraWide | 24:10
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| 3840 x 1080 | UltraWide | 32:9
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| 3440 x 1440 | | 43:18
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| 3240 x 2160 | | 3:2
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| 3200 x 1800 | 3K | 16:9
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| 3000 x 2000 | | 3:2
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| 2880 x 1800 | 2.8K | 16:10
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| 2880 x 1620 | 2.8K | 16:9
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| 2736 x 1824 |
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| 2560 x 1600 | 2K | 16:10
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| 2560 x 1440 | 2K | 16:9
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| 2560 x 1080 | UltraWide | 21:9
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| 2496 x 1664 |
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| 2256 x 1504 |
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| 2048 x 1152 |
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| 1920 x 1200 | FHD | 16:10
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| 1920 x 1080 | FHD | 16:9
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| 1800 x 1200 | FHD | 3:2
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| 1680 x 1050 | HD+ | 16:10
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| 1600 x 1200 | HD+ | 4:3
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| 1600 x 900 | HD+ | 16:9
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| 1440 x 900 | HD | 16:10
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| 1366 x 768 |
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| 1280 x 800 | HD | 16:10
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| 1280 x 720 | HD | 16:9
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<br>
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## ParsecVDD adapter
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- Name: Parsec Virtual Display Adapter
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- Hardware ID: `Root\Parsec\VDA`
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- Adapter GUID: `{00b41627-04c4-429e-a26e-0265cf50c8fa}`
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- EDID:
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```
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00 FF FF FF FF FF FF 00 42 63 D0 CD ED 5F 84 00
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11 1E 01 04 A5 35 1E 78 3B 57 E0 A5 54 4F 9D 26
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12 50 54 27 CF 00 71 4F 81 80 81 40 81 C0 81 00
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95 00 B3 00 01 01 86 6F 80 A0 70 38 40 40 30 20
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35 00 E0 0E 11 00 00 1A 00 00 00 FD 00 30 A5 C1
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C1 29 01 0A 20 20 20 20 20 20 00 00 00 FC 00 50
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61 72 73 65 63 56 44 41 0A 20 20 20 00 00 00 10
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 C6
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02 03 10 00 4B 90 05 04 03 02 01 11 12 13 14 1F
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8A 4D 80 A0 70 38 2C 40 30 20 35 00 E0 0E 11 00
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00 1A FE 5B 80 A0 70 38 35 40 30 20 35 00 E0 0E
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11 00 00 1A FC 7E 80 88 70 38 12 40 18 20 35 00
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E0 0E 11 00 00 1E A4 9C 80 A0 70 38 59 40 30 20
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35 00 E0 0E 11 00 00 1A 02 3A 80 18 71 38 2D 40
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58 2C 45 00 E0 0E 11 00 00 1E 00 00 00 00 00 00
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00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 A6
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```
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Visit http://www.edidreader.com/ to view it online or use an advanced tool [AW EDID Editor](https://www.analogway.com/apac/products/software-tools/aw-edid-editor/)
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