enricobuehler
7cfeddc770
The win32u hook only works if it patches before DXGI caches the hybrid preference. It was installed in DuplCapturer::open (first capture), but the SudoVDA render-adapter selection creates a DXGI factory during virtual-display setup — seconds earlier — so the preference was already cached and the hook had no effect (churn persisted; log showed "render adapter chosen" at :02, "hook installed" at :04). Call install_gpu_pref_hook() at the top of real_main(), before any command runs, so it beats the first DXGI factory. (open() still calls it too; Once makes the earliest call win.) Also fix the cosmetic function-cast-as-integer warning. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
1943 lines
86 KiB
Rust
1943 lines
86 KiB
Rust
//! DXGI Desktop Duplication capture (Windows) — the analogue of the PipeWire portal capturer.
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//! Creates a D3D11 device on the SudoVDA adapter (by LUID), finds the matching output (by GDI
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//! name), duplicates it, and on each `AcquireNextFrame` copies the desktop image into a CPU-readable
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//! staging texture → tightly-packed BGRA (the GPU-less path that feeds the software encoder). A
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//! future zero-copy path returns `FramePayload::D3d11` for NVENC.
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//!
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//! Validates only with a real GPU + an *activated* SudoVDA monitor (`DuplicateOutput` needs a live
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//! WDDM output). Compiles on the GPU-less VM; the pure helpers are unit-tested there.
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use super::{CapturedFrame, Capturer, FramePayload, PixelFormat};
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use anyhow::{anyhow, bail, Context, Result};
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use std::ffi::c_void;
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use std::sync::atomic::{AtomicBool, Ordering};
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use std::time::{Duration, Instant, SystemTime, UNIX_EPOCH};
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use windows::core::{s, Interface, PCSTR};
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use windows::Win32::Foundation::{HMODULE, LUID};
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use windows::Win32::Graphics::Direct3D::Fxc::D3DCompile;
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use windows::Win32::Graphics::Direct3D::{
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ID3DBlob, D3D_DRIVER_TYPE_UNKNOWN, D3D_FEATURE_LEVEL_11_0, D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST,
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D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP,
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};
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use windows::Win32::Graphics::Direct3D11::{
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D3D11CreateDevice, ID3D11BlendState, ID3D11Buffer, ID3D11Device, ID3D11DeviceContext,
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ID3D11PixelShader, ID3D11RenderTargetView, ID3D11SamplerState, ID3D11ShaderResourceView,
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ID3D11Texture2D, ID3D11VertexShader, D3D11_BIND_CONSTANT_BUFFER, D3D11_BIND_FLAG,
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D3D11_BIND_RENDER_TARGET, D3D11_BIND_SHADER_RESOURCE, D3D11_BLEND_DESC,
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D3D11_BLEND_INV_DEST_COLOR, D3D11_BLEND_INV_SRC_ALPHA, D3D11_BLEND_ONE, D3D11_BLEND_OP_ADD,
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D3D11_BLEND_SRC_ALPHA, D3D11_BUFFER_DESC, D3D11_COLOR_WRITE_ENABLE_ALL, D3D11_COMPARISON_NEVER,
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D3D11_CPU_ACCESS_READ, D3D11_CPU_ACCESS_WRITE, D3D11_CREATE_DEVICE_BGRA_SUPPORT,
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D3D11_FILTER_MIN_MAG_MIP_POINT, D3D11_MAPPED_SUBRESOURCE, D3D11_MAP_READ,
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D3D11_MAP_WRITE_DISCARD, D3D11_RENDER_TARGET_BLEND_DESC, D3D11_SAMPLER_DESC, D3D11_SDK_VERSION,
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D3D11_SUBRESOURCE_DATA, D3D11_TEXTURE2D_DESC, D3D11_TEXTURE_ADDRESS_CLAMP, D3D11_USAGE_DEFAULT,
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D3D11_USAGE_DYNAMIC, D3D11_USAGE_STAGING, D3D11_VIEWPORT,
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};
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use windows::Win32::Graphics::Dxgi::Common::{
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DXGI_FORMAT_B8G8R8A8_UNORM, DXGI_FORMAT_R10G10B10A2_UNORM, DXGI_FORMAT_R16G16B16A16_FLOAT,
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DXGI_SAMPLE_DESC,
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};
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use windows::Win32::Graphics::Dxgi::{
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CreateDXGIFactory1, IDXGIAdapter1, IDXGIFactory1, IDXGIOutput1, IDXGIOutputDuplication,
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IDXGIResource, DXGI_ERROR_ACCESS_LOST, DXGI_ERROR_DEVICE_REMOVED, DXGI_ERROR_DEVICE_RESET,
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DXGI_ERROR_INVALID_CALL, DXGI_ERROR_WAIT_TIMEOUT, DXGI_OUTDUPL_DESC, DXGI_OUTDUPL_FRAME_INFO,
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DXGI_OUTDUPL_POINTER_SHAPE_INFO, DXGI_OUTDUPL_POINTER_SHAPE_TYPE_COLOR,
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DXGI_OUTDUPL_POINTER_SHAPE_TYPE_MASKED_COLOR,
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};
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use windows::Win32::System::StationsAndDesktops::{
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OpenInputDesktop, SetThreadDesktop, DESKTOP_ACCESS_FLAGS, DESKTOP_CONTROL_FLAGS,
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};
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use windows::Win32::UI::WindowsAndMessaging::SetCursorPos;
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/// The Windows capture identity carried out of the SudoVDA backend in
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/// [`crate::vdisplay::VirtualOutput`]: which adapter + which GDI output to duplicate.
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#[derive(Clone, Debug)]
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pub struct WinCaptureTarget {
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/// Packed DXGI adapter LUID (`(HighPart << 32) | (LowPart & 0xffff_ffff)`).
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pub adapter_luid: i64,
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/// The output's GDI device name, e.g. `\\.\DISPLAY3`. Can CHANGE across a secure-desktop switch.
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pub gdi_name: String,
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/// Stable SudoVDA target id — re-resolved to the current GDI name on every recovery.
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pub target_id: u32,
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}
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/// A GPU-resident captured texture (future NVENC-D3D11 zero-copy path).
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pub struct D3d11Frame {
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pub texture: ID3D11Texture2D,
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pub device: ID3D11Device,
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}
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// COM pointers, used only from the single owning thread.
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unsafe impl Send for D3d11Frame {}
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pub fn pack_luid(luid: LUID) -> i64 {
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((luid.HighPart as i64) << 32) | (luid.LowPart as i64 & 0xffff_ffff)
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}
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/// Does a fixed-size UTF-16 GDI device name (NUL-padded, e.g. `DXGI_OUTPUT_DESC::DeviceName`)
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/// equal `target`?
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fn gdi_name_matches(name16: &[u16], target: &str) -> bool {
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let s = String::from_utf16_lossy(name16);
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s.trim_end_matches('\u{0}') == target
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}
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/// Copy a row-padded BGRA surface (`pitch` >= `w*4`) into a tightly-packed `w*4*h` buffer.
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fn depad_bgra(src: &[u8], pitch: usize, w: usize, h: usize) -> Vec<u8> {
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let row = w * 4;
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let mut out = vec![0u8; row * h];
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for y in 0..h {
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out[y * row..y * row + row].copy_from_slice(&src[y * pitch..y * pitch + row]);
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}
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out
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}
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/// Re-find the live `IDXGIOutput1` for a GDI name across all adapters (the SudoVDA monitor is
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/// enumerated under the rendering GPU). Used to recover after ACCESS_LOST, where the cached handle
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/// may be stale.
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pub(crate) unsafe fn find_output(gdi_name: &str) -> Result<(IDXGIAdapter1, IDXGIOutput1)> {
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let factory: IDXGIFactory1 = CreateDXGIFactory1().context("CreateDXGIFactory1")?;
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let mut i = 0u32;
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while let Ok(a) = factory.EnumAdapters1(i) {
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let mut j = 0u32;
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while let Ok(o) = a.EnumOutputs(j) {
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let od = o.GetDesc()?;
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if gdi_name_matches(&od.DeviceName, gdi_name) {
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// Diagnostic: which ADAPTER does this output sit under, and at what LUID? If this LUID
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// BOUNCES across an ACCESS_LOST storm, the output is being reparented between adapters
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// (the multi-GPU/IDD case Apollo's win32u hook + SET_RENDER_ADAPTER fix). If it's STABLE,
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// the storm is something else (e.g. HDR independent-flip DDA can't capture).
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if let Ok(ad) = a.GetDesc1() {
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let name = String::from_utf16_lossy(&ad.Description);
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tracing::info!(
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output = gdi_name,
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adapter = name.trim_end_matches('\u{0}'),
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luid = format!(
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"{:08x}:{:08x}",
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ad.AdapterLuid.HighPart, ad.AdapterLuid.LowPart
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),
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"find_output: output resolved under adapter"
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);
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}
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return Ok((a.clone(), o.cast::<IDXGIOutput1>()?));
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}
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j += 1;
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}
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i += 1;
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}
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bail!("no DXGI output named {gdi_name} (gone after ACCESS_LOST?)")
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}
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/// Create a fresh D3D11 device + context on a specific adapter (driver_type UNKNOWN with an explicit
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/// adapter). Used at open and on every ACCESS_LOST: a device created on one desktop cannot sustain a
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/// duplication on a *different* desktop (perpetual ACCESS_LOST), so the secure-desktop switch needs a
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/// device made while the thread is attached to that desktop.
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pub(crate) unsafe fn make_device(
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adapter: &IDXGIAdapter1,
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) -> Result<(ID3D11Device, ID3D11DeviceContext)> {
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let mut device: Option<ID3D11Device> = None;
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let mut context: Option<ID3D11DeviceContext> = None;
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D3D11CreateDevice(
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adapter,
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D3D_DRIVER_TYPE_UNKNOWN,
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HMODULE::default(),
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D3D11_CREATE_DEVICE_BGRA_SUPPORT,
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Some(&[D3D_FEATURE_LEVEL_11_0]),
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D3D11_SDK_VERSION,
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Some(&mut device),
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None,
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Some(&mut context),
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)
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.context("D3D11CreateDevice")?;
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Ok((
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device.context("null D3D11 device")?,
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context.context("null D3D11 context")?,
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))
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}
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/// Re-find the output, make a fresh device on its adapter, and duplicate it. Used by the ACCESS_LOST
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/// recovery to rebuild the whole capture on the current (possibly secure) input desktop.
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unsafe fn reopen_duplication(
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gdi_name: &str,
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) -> Result<(
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ID3D11Device,
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ID3D11DeviceContext,
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IDXGIOutput1,
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IDXGIOutputDuplication,
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)> {
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let (adapter, out) = find_output(gdi_name)?;
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let (dev, ctx) = make_device(&adapter)?;
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let dupl = out
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.DuplicateOutput(&dev)
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.context("re-DuplicateOutput after ACCESS_LOST")?;
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Ok((dev, ctx, out, dupl))
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}
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/// Park the cursor on a duplicated output. A blank virtual display emits NO Desktop Duplication
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/// frames until something changes; a pointer move IS a DDA "change", so this kicks the very first
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/// `AcquireNextFrame` loose — and lands the cursor on the display the client is viewing. Two moves
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/// to distinct points guarantee an actual move even if the cursor already sat at the center.
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/// Follow the current input desktop so duplication spans the normal ↔ Winlogon (secure: login/UAC)
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/// desktops. Opening the secure desktop requires SYSTEM; on a non-SYSTEM host this just fails on
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/// Winlogon (capture freezes there) — which is why the host relaunches itself as SYSTEM. The HDESK
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/// is intentionally leaked: it must stay open while it's the thread's desktop, and switches
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/// (lock/unlock/UAC) are rare, so a few handles per session is fine.
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unsafe fn attach_input_desktop() {
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match OpenInputDesktop(
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DESKTOP_CONTROL_FLAGS(0),
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false,
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DESKTOP_ACCESS_FLAGS(0x1000_0000), // GENERIC_ALL
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) {
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Ok(desk) => match SetThreadDesktop(desk) {
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Ok(()) => tracing::info!("attach_input_desktop: SetThreadDesktop OK"),
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Err(e) => {
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tracing::warn!(error = %format!("{e:?}"), "attach_input_desktop: SetThreadDesktop FAILED")
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}
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},
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Err(e) => {
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tracing::warn!(error = %format!("{e:?}"), "attach_input_desktop: OpenInputDesktop FAILED")
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}
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}
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}
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pub(crate) unsafe fn nudge_cursor_onto(output: &IDXGIOutput1) {
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if let Ok(od) = output.GetDesc() {
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let r = od.DesktopCoordinates;
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let _ = SetCursorPos(r.left + 8, r.top + 8);
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let _ = SetCursorPos((r.left + r.right) / 2, (r.top + r.bottom) / 2);
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}
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}
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/// Replacement for `win32u.dll!NtGdiDdDDIGetCachedHybridQueryValue`: always report
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/// `D3DKMT_GPU_PREFERENCE_STATE_UNSPECIFIED` (3). We fully replace the function (never call the
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/// original), so no trampoline is needed. (Ported verbatim from Apollo's MinHook hook.)
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unsafe extern "system" fn hybrid_query_hook(gpu_preference: *mut u32) -> i32 {
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if gpu_preference.is_null() {
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return 0xC000_000Du32 as i32; // STATUS_INVALID_PARAMETER
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}
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*gpu_preference = 3; // D3DKMT_GPU_PREFERENCE_STATE_UNSPECIFIED
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0 // STATUS_SUCCESS
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}
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/// Apollo's win32u GPU-preference hook, ported. On a HYBRID-GPU box DXGI resolves a GPU preference
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/// (registry + power settings + the hybrid-adapter DDI) and REPARENTS outputs onto the chosen render
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/// GPU — which constantly invalidates Desktop Duplication (DXGI_ERROR_ACCESS_LOST 0x887A0026, the
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/// freeze/churn observed on the RTX 4090 + AMD iGPU box; `SET_RENDER_ADAPTER` is ignored there). Faking
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/// a cached preference of UNSPECIFIED makes DXGI skip the resolution, so the output is NOT reparented
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/// and DDA stays stable on one adapter (this is what makes Apollo's DDA work on this hardware).
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/// Installed once, before the first DXGI factory/enumeration; lasts the process lifetime (like Apollo).
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pub(crate) fn install_gpu_pref_hook() {
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use std::sync::Once;
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static HOOK: Once = Once::new();
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HOOK.call_once(|| unsafe {
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use windows::Win32::System::LibraryLoader::{GetProcAddress, LoadLibraryA};
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use windows::Win32::System::Memory::{
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VirtualProtect, PAGE_EXECUTE_READWRITE, PAGE_PROTECTION_FLAGS,
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};
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let Ok(lib) = LoadLibraryA(s!("win32u.dll")) else {
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tracing::warn!("GPU-pref hook: win32u.dll not loadable — skipping (DDA may churn on hybrid GPUs)");
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return;
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};
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let Some(target) = GetProcAddress(lib, s!("NtGdiDdDDIGetCachedHybridQueryValue")) else {
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tracing::warn!("GPU-pref hook: NtGdiDdDDIGetCachedHybridQueryValue not exported — skipping");
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return;
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};
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let target = target as usize as *mut u8;
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// x64 absolute jump to our replacement: `mov rax, imm64 ; jmp rax` (12 bytes). We never call the
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// original, so no trampoline/relocation (hence no detour crate / C length-disassembler dep).
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let hook = hybrid_query_hook as *const () as usize;
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let mut patch = [0u8; 12];
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patch[0] = 0x48;
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patch[1] = 0xB8; // mov rax, imm64
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patch[2..10].copy_from_slice(&hook.to_le_bytes());
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patch[10] = 0xFF;
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patch[11] = 0xE0; // jmp rax
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let mut old = PAGE_PROTECTION_FLAGS(0);
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if VirtualProtect(target as *const c_void, 12, PAGE_EXECUTE_READWRITE, &mut old).is_err() {
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tracing::warn!("GPU-pref hook: VirtualProtect failed — skipping");
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return;
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}
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std::ptr::copy_nonoverlapping(patch.as_ptr(), target, 12);
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let mut restore = PAGE_PROTECTION_FLAGS(0);
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let _ = VirtualProtect(target as *const c_void, 12, old, &mut restore);
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// No FlushInstructionCache: the patch lands before the first DXGI call on this same thread, so
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// the i-cache is coherent (cross-modifying code would need a flush; this is same-thread setup).
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tracing::info!(
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"GPU-pref hook installed (win32u hybrid-query -> UNSPECIFIED): DXGI output reparenting disabled"
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);
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});
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}
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// DXGI Desktop Duplication deliberately EXCLUDES the hardware cursor from the captured surface (the
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// OS composites it separately). We capture the cursor shape/position from the frame info and blend it
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// back in — on the GPU for the zero-copy path (a CPU readback would stall the 240 fps pipeline).
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const CURSOR_VS: &str = r"
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cbuffer Rect : register(b0) { float4 r; };
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struct VOut { float4 pos : SV_POSITION; float2 uv : TEXCOORD0; };
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VOut main(uint vid : SV_VertexID) {
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float2 uv = float2((vid == 1 || vid == 3) ? 1.0 : 0.0, (vid >= 2) ? 1.0 : 0.0);
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VOut o;
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o.pos = float4(lerp(r.x, r.z, uv.x), lerp(r.y, r.w, uv.y), 0.0, 1.0);
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o.uv = uv;
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return o;
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}
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";
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const CURSOR_PS: &str = r"
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Texture2D tx : register(t0);
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SamplerState sm : register(s0);
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// b0 is shared with the VS: float4 rect, then the HDR cursor params. For SDR white_mul=1 / decode=0
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// so this is a no-op (returns the raw sampled BGRA, blended in the display's native sRGB space). For
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// HDR the cursor is composited onto a LINEAR scRGB FP16 surface where 1.0 = 80 nits, so we sRGB→
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// linear decode (correct alpha blending + no dark edge fringe) and scale to HDR graphics white
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// (~203 nits → white_mul = 203/80) so the cursor isn't ~2.5x too dim vs the HDR desktop.
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cbuffer C : register(b0) { float4 rect; float white_mul; float decode; float2 pad; };
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float3 srgb_to_linear(float3 c) {
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return c <= 0.04045 ? c / 12.92 : pow((c + 0.055) / 1.055, 2.4);
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}
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float4 main(float4 pos : SV_POSITION, float2 uv : TEXCOORD0) : SV_TARGET {
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float4 s = tx.Sample(sm, uv);
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float3 rgb = s.rgb;
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if (decode > 0.5) { rgb = srgb_to_linear(rgb); }
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rgb *= white_mul;
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return float4(rgb, s.a);
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}
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";
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unsafe fn compile_shader(src: &str, entry: PCSTR, target: PCSTR) -> Result<Vec<u8>> {
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let mut blob: Option<ID3DBlob> = None;
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let mut errs: Option<ID3DBlob> = None;
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let r = D3DCompile(
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src.as_ptr() as *const c_void,
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src.len(),
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PCSTR::null(),
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None,
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None,
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entry,
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target,
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0,
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0,
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&mut blob,
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Some(&mut errs),
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);
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if r.is_err() {
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let msg = errs
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.as_ref()
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.map(|e| {
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let p = e.GetBufferPointer() as *const u8;
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String::from_utf8_lossy(std::slice::from_raw_parts(p, e.GetBufferSize()))
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.to_string()
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})
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.unwrap_or_default();
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bail!("D3DCompile failed: {msg}");
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}
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let blob = blob.context("no shader blob")?;
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let p = blob.GetBufferPointer() as *const u8;
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Ok(std::slice::from_raw_parts(p, blob.GetBufferSize()).to_vec())
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}
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/// A DXGI cursor shape decomposed into up to two BGRA layers. A single shape can require BOTH a
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/// normal alpha-blended layer AND a screen-inverting (XOR) layer at once — e.g. a masked-color text
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/// I-beam (opaque pixels + invert pixels) or a monochrome cursor mixing opaque and invert pixels.
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/// Each layer is composited with its own blend; a single image + single blend (the old approach)
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/// renders such mixed shapes wrong (wrong color, or a black box where the screen should invert).
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#[derive(Clone, Default)]
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struct CursorShape {
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w: u32,
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h: u32,
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/// Layer composited with src-over alpha (transparent where a==0). `None` if it has no pixels.
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alpha: Option<Vec<u8>>,
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/// Layer composited with the inversion blend (white opaque → invert the screen underneath).
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/// `None` if it has no pixels.
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xor: Option<Vec<u8>>,
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}
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/// GPU cursor overlay: a tiny shader pipeline that blends the cursor texture(s) onto the captured
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/// frame. Tied to one D3D11 device; rebuilt when the capturer recreates its device on a desktop switch.
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struct CursorCompositor {
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vs: ID3D11VertexShader,
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ps: ID3D11PixelShader,
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cbuf: ID3D11Buffer,
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blend: ID3D11BlendState,
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/// Inversion blend for masked-color (XOR) cursors like the text I-beam: result = white*(1-dest),
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/// i.e. it inverts the screen under the cursor so it's visible on any background.
|
||
blend_invert: ID3D11BlendState,
|
||
sampler: ID3D11SamplerState,
|
||
/// Alpha-blended layer (normal cursor pixels). srv + width + height.
|
||
tex_alpha: Option<(ID3D11ShaderResourceView, u32, u32)>,
|
||
/// Inversion-blended layer (screen-inverting pixels: masked-color I-beam bar, monochrome invert).
|
||
tex_xor: Option<(ID3D11ShaderResourceView, u32, u32)>,
|
||
}
|
||
|
||
impl CursorCompositor {
|
||
unsafe fn new(device: &ID3D11Device) -> Result<Self> {
|
||
let vsb = compile_shader(CURSOR_VS, s!("main"), s!("vs_5_0"))?;
|
||
let psb = compile_shader(CURSOR_PS, s!("main"), s!("ps_5_0"))?;
|
||
let mut vs = None;
|
||
device.CreateVertexShader(&vsb, None, Some(&mut vs))?;
|
||
let mut ps = None;
|
||
device.CreatePixelShader(&psb, None, Some(&mut ps))?;
|
||
|
||
let cbd = D3D11_BUFFER_DESC {
|
||
ByteWidth: 32, // float4 rect + (white_mul, decode, pad, pad) for the HDR cursor PS
|
||
Usage: D3D11_USAGE_DYNAMIC,
|
||
BindFlags: D3D11_BIND_CONSTANT_BUFFER.0 as u32,
|
||
CPUAccessFlags: D3D11_CPU_ACCESS_WRITE.0 as u32,
|
||
..Default::default()
|
||
};
|
||
let mut cbuf = None;
|
||
device.CreateBuffer(&cbd, None, Some(&mut cbuf))?;
|
||
|
||
let mut bd = D3D11_BLEND_DESC::default();
|
||
bd.RenderTarget[0] = D3D11_RENDER_TARGET_BLEND_DESC {
|
||
BlendEnable: true.into(),
|
||
SrcBlend: D3D11_BLEND_SRC_ALPHA,
|
||
DestBlend: D3D11_BLEND_INV_SRC_ALPHA,
|
||
BlendOp: D3D11_BLEND_OP_ADD,
|
||
SrcBlendAlpha: D3D11_BLEND_ONE,
|
||
DestBlendAlpha: D3D11_BLEND_INV_SRC_ALPHA,
|
||
BlendOpAlpha: D3D11_BLEND_OP_ADD,
|
||
RenderTargetWriteMask: D3D11_COLOR_WRITE_ENABLE_ALL.0 as u8,
|
||
};
|
||
let mut blend = None;
|
||
device.CreateBlendState(&bd, Some(&mut blend))?;
|
||
|
||
// Inversion blend: result.rgb = src*(1-dest) + dest*(1-src.a). A white opaque cursor pixel
|
||
// (src=1,a=1) -> 1-dest (inverted); a transparent pixel (src=0,a=0) -> dest (unchanged).
|
||
let mut bdi = D3D11_BLEND_DESC::default();
|
||
bdi.RenderTarget[0] = D3D11_RENDER_TARGET_BLEND_DESC {
|
||
BlendEnable: true.into(),
|
||
SrcBlend: D3D11_BLEND_INV_DEST_COLOR,
|
||
DestBlend: D3D11_BLEND_INV_SRC_ALPHA,
|
||
BlendOp: D3D11_BLEND_OP_ADD,
|
||
SrcBlendAlpha: D3D11_BLEND_ONE,
|
||
DestBlendAlpha: D3D11_BLEND_INV_SRC_ALPHA,
|
||
BlendOpAlpha: D3D11_BLEND_OP_ADD,
|
||
RenderTargetWriteMask: D3D11_COLOR_WRITE_ENABLE_ALL.0 as u8,
|
||
};
|
||
let mut blend_invert = None;
|
||
device.CreateBlendState(&bdi, Some(&mut blend_invert))?;
|
||
|
||
let sd = D3D11_SAMPLER_DESC {
|
||
Filter: D3D11_FILTER_MIN_MAG_MIP_POINT,
|
||
AddressU: D3D11_TEXTURE_ADDRESS_CLAMP,
|
||
AddressV: D3D11_TEXTURE_ADDRESS_CLAMP,
|
||
AddressW: D3D11_TEXTURE_ADDRESS_CLAMP,
|
||
ComparisonFunc: D3D11_COMPARISON_NEVER,
|
||
MaxLOD: f32::MAX,
|
||
..Default::default()
|
||
};
|
||
let mut sampler = None;
|
||
device.CreateSamplerState(&sd, Some(&mut sampler))?;
|
||
|
||
Ok(Self {
|
||
vs: vs.context("vs")?,
|
||
ps: ps.context("ps")?,
|
||
cbuf: cbuf.context("cbuf")?,
|
||
blend: blend.context("blend")?,
|
||
blend_invert: blend_invert.context("blend_invert")?,
|
||
sampler: sampler.context("sampler")?,
|
||
tex_alpha: None,
|
||
tex_xor: None,
|
||
})
|
||
}
|
||
|
||
/// Upload one BGRA layer as an immutable shader-resource texture and return its SRV.
|
||
unsafe fn upload_layer(
|
||
device: &ID3D11Device,
|
||
bgra: &[u8],
|
||
w: u32,
|
||
h: u32,
|
||
) -> Result<ID3D11ShaderResourceView> {
|
||
let desc = D3D11_TEXTURE2D_DESC {
|
||
Width: w,
|
||
Height: h,
|
||
MipLevels: 1,
|
||
ArraySize: 1,
|
||
Format: DXGI_FORMAT_B8G8R8A8_UNORM,
|
||
SampleDesc: DXGI_SAMPLE_DESC {
|
||
Count: 1,
|
||
Quality: 0,
|
||
},
|
||
Usage: D3D11_USAGE_DEFAULT,
|
||
BindFlags: D3D11_BIND_SHADER_RESOURCE.0 as u32,
|
||
..Default::default()
|
||
};
|
||
let init = D3D11_SUBRESOURCE_DATA {
|
||
pSysMem: bgra.as_ptr() as *const c_void,
|
||
SysMemPitch: w * 4,
|
||
SysMemSlicePitch: 0,
|
||
};
|
||
let mut tex: Option<ID3D11Texture2D> = None;
|
||
device.CreateTexture2D(&desc, Some(&init), Some(&mut tex))?;
|
||
let tex = tex.context("cursor tex")?;
|
||
let mut srv = None;
|
||
device.CreateShaderResourceView(&tex, None, Some(&mut srv))?;
|
||
srv.context("cursor srv")
|
||
}
|
||
|
||
/// (Re)upload the decomposed cursor layers; either layer may be absent (→ that pass is skipped).
|
||
unsafe fn set_shapes(&mut self, device: &ID3D11Device, shape: &CursorShape) -> Result<()> {
|
||
self.tex_alpha = match &shape.alpha {
|
||
Some(b) => Some((
|
||
Self::upload_layer(device, b, shape.w, shape.h)?,
|
||
shape.w,
|
||
shape.h,
|
||
)),
|
||
None => None,
|
||
};
|
||
self.tex_xor = match &shape.xor {
|
||
Some(b) => Some((
|
||
Self::upload_layer(device, b, shape.w, shape.h)?,
|
||
shape.w,
|
||
shape.h,
|
||
)),
|
||
None => None,
|
||
};
|
||
Ok(())
|
||
}
|
||
|
||
/// Blend ONE cursor layer onto `rtv` (a render-target view of the captured frame) at frame pixel
|
||
/// (cx,cy). `invert` selects the inversion blend (screen-inverting pixels); otherwise normal
|
||
/// src-over alpha. A shape with both an alpha and an XOR layer is drawn by calling this twice.
|
||
#[allow(clippy::too_many_arguments)]
|
||
unsafe fn draw_layer(
|
||
&self,
|
||
ctx: &ID3D11DeviceContext,
|
||
rtv: &ID3D11RenderTargetView,
|
||
fw: u32,
|
||
fh: u32,
|
||
cx: i32,
|
||
cy: i32,
|
||
srv: &ID3D11ShaderResourceView,
|
||
cw: u32,
|
||
ch: u32,
|
||
invert: bool,
|
||
// HDR (decode=true): sRGB→linear decode + scale the cursor to `white_mul` × 80 nits, so a
|
||
// white cursor hits HDR graphics white (~203 nits) not 80. SDR passes white_mul=1.0,
|
||
// decode=false → the PS returns the raw sample (blended in the display's native sRGB space).
|
||
// The inversion (masked-color / I-beam) blend operates on the framebuffer reference, so the
|
||
// caller passes white_mul=1.0/decode=false for the XOR layer even in HDR.
|
||
white_mul: f32,
|
||
decode: bool,
|
||
) {
|
||
let x0 = (cx as f32 / fw as f32) * 2.0 - 1.0;
|
||
let x1 = ((cx + cw as i32) as f32 / fw as f32) * 2.0 - 1.0;
|
||
let y0 = 1.0 - (cy as f32 / fh as f32) * 2.0;
|
||
let y1 = 1.0 - ((cy + ch as i32) as f32 / fh as f32) * 2.0;
|
||
let (mul, dec) = if invert {
|
||
(1.0_f32, 0.0_f32)
|
||
} else {
|
||
(white_mul, if decode { 1.0 } else { 0.0 })
|
||
};
|
||
// cbuf layout: [rect.x, rect.y, rect.z, rect.w, white_mul, decode, pad, pad] (32 bytes).
|
||
let cb = [x0, y0, x1, y1, mul, dec, 0.0, 0.0];
|
||
let mut mapped = D3D11_MAPPED_SUBRESOURCE::default();
|
||
if ctx
|
||
.Map(&self.cbuf, 0, D3D11_MAP_WRITE_DISCARD, 0, Some(&mut mapped))
|
||
.is_ok()
|
||
{
|
||
std::ptr::copy_nonoverlapping(cb.as_ptr(), mapped.pData as *mut f32, cb.len());
|
||
ctx.Unmap(&self.cbuf, 0);
|
||
}
|
||
let vp = D3D11_VIEWPORT {
|
||
TopLeftX: 0.0,
|
||
TopLeftY: 0.0,
|
||
Width: fw as f32,
|
||
Height: fh as f32,
|
||
MinDepth: 0.0,
|
||
MaxDepth: 1.0,
|
||
};
|
||
ctx.RSSetViewports(Some(&[vp]));
|
||
ctx.OMSetRenderTargets(Some(&[Some(rtv.clone())]), None);
|
||
let blend = if invert {
|
||
&self.blend_invert
|
||
} else {
|
||
&self.blend
|
||
};
|
||
ctx.OMSetBlendState(blend, Some(&[0.0; 4]), 0xffff_ffff);
|
||
ctx.VSSetShader(&self.vs, None);
|
||
ctx.PSSetShader(&self.ps, None);
|
||
ctx.VSSetConstantBuffers(0, Some(&[Some(self.cbuf.clone())]));
|
||
ctx.PSSetConstantBuffers(0, Some(&[Some(self.cbuf.clone())])); // white_mul/decode for the PS
|
||
ctx.PSSetShaderResources(0, Some(&[Some(srv.clone())]));
|
||
ctx.PSSetSamplers(0, Some(&[Some(self.sampler.clone())]));
|
||
ctx.IASetInputLayout(None);
|
||
ctx.IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);
|
||
ctx.Draw(4, 0);
|
||
// Unbind the render target so the next frame's CopyResource into this texture is unobstructed.
|
||
ctx.OMSetRenderTargets(Some(&[None]), None);
|
||
}
|
||
}
|
||
|
||
/// Fullscreen-triangle vertex shader for the HDR conversion pass (3 verts, no input layout).
|
||
const HDR_VS: &str = r"
|
||
struct VOut { float4 pos : SV_POSITION; float2 uv : TEXCOORD0; };
|
||
VOut main(uint vid : SV_VertexID) {
|
||
float2 uv = float2((vid << 1) & 2, vid & 2);
|
||
VOut o;
|
||
o.pos = float4(uv * float2(2.0, -2.0) + float2(-1.0, 1.0), 0.0, 1.0);
|
||
o.uv = uv;
|
||
return o;
|
||
}
|
||
";
|
||
|
||
/// HDR conversion pixel shader: scRGB FP16 desktop (linear, Rec.709 primaries, 1.0 = 80 nits) →
|
||
/// BT.2020 primaries → SMPTE ST 2084 (PQ) → written to a 10-bit R10G10B10A2 target for NVENC
|
||
/// (HEVC Main10 / HDR10). This is the standard Windows-HDR capture conversion (matches OBS/Sunshine).
|
||
const HDR_PS: &str = r"
|
||
Texture2D<float4> tx : register(t0);
|
||
SamplerState sm : register(s0);
|
||
// Rec.709 → Rec.2020 primaries (linear). Column-major rows as written, used with mul(M, v).
|
||
static const float3x3 BT709_TO_BT2020 = {
|
||
0.627403914, 0.329283038, 0.043313048,
|
||
0.069097292, 0.919540405, 0.011362303,
|
||
0.016391439, 0.088013308, 0.895595253
|
||
};
|
||
float3 pq_oetf(float3 L) {
|
||
// L normalized so 1.0 = 10000 nits. ST 2084.
|
||
const float m1 = 0.1593017578125;
|
||
const float m2 = 78.84375;
|
||
const float c1 = 0.8359375;
|
||
const float c2 = 18.8515625;
|
||
const float c3 = 18.6875;
|
||
float3 Lp = pow(saturate(L), m1);
|
||
return pow((c1 + c2 * Lp) / (1.0 + c3 * Lp), m2);
|
||
}
|
||
float4 main(float4 pos : SV_POSITION, float2 uv : TEXCOORD0) : SV_TARGET {
|
||
float3 scrgb = max(tx.Sample(sm, uv).rgb, 0.0); // scRGB can be negative (wide gamut); clamp
|
||
float3 nits = scrgb * 80.0; // scRGB 1.0 = 80 nits → absolute luminance
|
||
float3 lin2020 = mul(BT709_TO_BT2020, nits); // primaries conversion (linear)
|
||
float3 pq = pq_oetf(lin2020 / 10000.0); // normalize to 10k nits, encode PQ
|
||
return float4(pq, 1.0);
|
||
}
|
||
";
|
||
|
||
/// scRGB FP16 → BT.2020 PQ 10-bit conversion pass. One per capture device (rebuilt on device
|
||
/// recreate, like [`CursorCompositor`]). A single fullscreen draw samples the FP16 source SRV and
|
||
/// writes PQ-encoded BT.2020 to the bound R10G10B10A2 render target.
|
||
pub(crate) struct HdrConverter {
|
||
vs: ID3D11VertexShader,
|
||
ps: ID3D11PixelShader,
|
||
sampler: ID3D11SamplerState,
|
||
}
|
||
|
||
impl HdrConverter {
|
||
pub(crate) unsafe fn new(device: &ID3D11Device) -> Result<Self> {
|
||
let vsb = compile_shader(HDR_VS, s!("main"), s!("vs_5_0"))?;
|
||
let psb = compile_shader(HDR_PS, s!("main"), s!("ps_5_0"))?;
|
||
let mut vs = None;
|
||
device.CreateVertexShader(&vsb, None, Some(&mut vs))?;
|
||
let mut ps = None;
|
||
device.CreatePixelShader(&psb, None, Some(&mut ps))?;
|
||
let sd = D3D11_SAMPLER_DESC {
|
||
Filter: D3D11_FILTER_MIN_MAG_MIP_POINT,
|
||
AddressU: D3D11_TEXTURE_ADDRESS_CLAMP,
|
||
AddressV: D3D11_TEXTURE_ADDRESS_CLAMP,
|
||
AddressW: D3D11_TEXTURE_ADDRESS_CLAMP,
|
||
ComparisonFunc: D3D11_COMPARISON_NEVER,
|
||
MaxLOD: f32::MAX,
|
||
..Default::default()
|
||
};
|
||
let mut sampler = None;
|
||
device.CreateSamplerState(&sd, Some(&mut sampler))?;
|
||
Ok(Self {
|
||
vs: vs.context("hdr vs")?,
|
||
ps: ps.context("hdr ps")?,
|
||
sampler: sampler.context("hdr sampler")?,
|
||
})
|
||
}
|
||
|
||
/// Convert `src_srv` (FP16 scRGB) into `dst_rtv` (R10G10B10A2 PQ BT.2020). Opaque pass, no blend.
|
||
pub(crate) unsafe fn convert(
|
||
&self,
|
||
ctx: &ID3D11DeviceContext,
|
||
src_srv: &ID3D11ShaderResourceView,
|
||
dst_rtv: &ID3D11RenderTargetView,
|
||
w: u32,
|
||
h: u32,
|
||
) {
|
||
let vp = D3D11_VIEWPORT {
|
||
TopLeftX: 0.0,
|
||
TopLeftY: 0.0,
|
||
Width: w as f32,
|
||
Height: h as f32,
|
||
MinDepth: 0.0,
|
||
MaxDepth: 1.0,
|
||
};
|
||
ctx.RSSetViewports(Some(&[vp]));
|
||
ctx.OMSetRenderTargets(Some(&[Some(dst_rtv.clone())]), None);
|
||
ctx.OMSetBlendState(None, None, 0xffff_ffff); // opaque overwrite
|
||
ctx.VSSetShader(&self.vs, None);
|
||
ctx.PSSetShader(&self.ps, None);
|
||
ctx.PSSetShaderResources(0, Some(&[Some(src_srv.clone())]));
|
||
ctx.PSSetSamplers(0, Some(&[Some(self.sampler.clone())]));
|
||
ctx.IASetInputLayout(None);
|
||
ctx.IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
|
||
ctx.Draw(3, 0);
|
||
// Unbind so the next frame can CopyResource into the source and re-RTV the destination.
|
||
ctx.OMSetRenderTargets(Some(&[None]), None);
|
||
ctx.PSSetShaderResources(0, Some(&[None]));
|
||
}
|
||
}
|
||
|
||
/// Convert a DXGI pointer shape (color / masked-color / monochrome) into top-down BGRA.
|
||
fn convert_pointer_shape(buf: &[u8], si: &DXGI_OUTDUPL_POINTER_SHAPE_INFO) -> Option<CursorShape> {
|
||
let w = si.Width as usize;
|
||
let pitch = si.Pitch as usize;
|
||
if w == 0 || pitch == 0 {
|
||
return None;
|
||
}
|
||
// Type is a u32 (newtype constants compared via .0).
|
||
if si.Type == DXGI_OUTDUPL_POINTER_SHAPE_TYPE_COLOR.0 as u32 {
|
||
// Straight 32bpp BGRA with a real alpha channel → one alpha-blended layer, no XOR layer.
|
||
let h = si.Height as usize;
|
||
if buf.len() < pitch * h {
|
||
return None;
|
||
}
|
||
let mut alpha = vec![0u8; w * h * 4];
|
||
for y in 0..h {
|
||
for x in 0..w {
|
||
let s = y * pitch + x * 4;
|
||
let d = (y * w + x) * 4;
|
||
alpha[d] = buf[s];
|
||
alpha[d + 1] = buf[s + 1];
|
||
alpha[d + 2] = buf[s + 2];
|
||
alpha[d + 3] = buf[s + 3];
|
||
}
|
||
}
|
||
Some(CursorShape {
|
||
w: w as u32,
|
||
h: h as u32,
|
||
alpha: Some(alpha),
|
||
xor: None,
|
||
})
|
||
} else if si.Type == DXGI_OUTDUPL_POINTER_SHAPE_TYPE_MASKED_COLOR.0 as u32 {
|
||
// 32bpp where the alpha byte is a MASK selector (0x00 or 0xFF), not an alpha. A single shape
|
||
// can mix opaque and screen-inverting pixels (the text I-beam: opaque hot-spot dot + an
|
||
// inverting bar), so we split it into BOTH layers:
|
||
// mask 0x00 -> opaque RGB → ALPHA layer
|
||
// mask 0xFF, RGB != 0 -> invert the screen (white) → XOR layer
|
||
// mask 0xFF, RGB == 0 -> XOR with black = no-op → transparent in both
|
||
let h = si.Height as usize;
|
||
if buf.len() < pitch * h {
|
||
return None;
|
||
}
|
||
let mut alpha = vec![0u8; w * h * 4];
|
||
let mut xor = vec![0u8; w * h * 4];
|
||
let (mut any_alpha, mut any_xor) = (false, false);
|
||
for y in 0..h {
|
||
for x in 0..w {
|
||
let s = y * pitch + x * 4;
|
||
let d = (y * w + x) * 4;
|
||
let (b, g, r, mask) = (buf[s], buf[s + 1], buf[s + 2], buf[s + 3]);
|
||
if mask == 0 {
|
||
alpha[d] = b;
|
||
alpha[d + 1] = g;
|
||
alpha[d + 2] = r;
|
||
alpha[d + 3] = 255;
|
||
any_alpha = true;
|
||
} else if b != 0 || g != 0 || r != 0 {
|
||
// inverting pixel → white opaque; the inversion blend turns this into 1-dest
|
||
xor[d] = 255;
|
||
xor[d + 1] = 255;
|
||
xor[d + 2] = 255;
|
||
xor[d + 3] = 255;
|
||
any_xor = true;
|
||
}
|
||
}
|
||
}
|
||
Some(CursorShape {
|
||
w: w as u32,
|
||
h: h as u32,
|
||
alpha: any_alpha.then_some(alpha),
|
||
xor: any_xor.then_some(xor),
|
||
})
|
||
} else {
|
||
// Monochrome: top half = AND mask, bottom half = XOR mask, 1 bpp. Per-pixel (AND,XOR):
|
||
// (0,0) opaque black → ALPHA layer
|
||
// (0,1) opaque white → ALPHA layer
|
||
// (1,0) transparent → neither layer
|
||
// (1,1) invert the screen → XOR layer (white opaque) — was previously approximated as
|
||
// solid black, which is the bug this split fixes.
|
||
let h = (si.Height / 2) as usize;
|
||
if buf.len() < pitch * h * 2 {
|
||
return None;
|
||
}
|
||
let bit = |row: usize, x: usize| (buf[row * pitch + x / 8] >> (7 - (x % 8))) & 1;
|
||
let mut alpha = vec![0u8; w * h * 4];
|
||
let mut xor = vec![0u8; w * h * 4];
|
||
let (mut any_alpha, mut any_xor) = (false, false);
|
||
for y in 0..h {
|
||
for x in 0..w {
|
||
let and_bit = bit(y, x);
|
||
let xor_bit = bit(y + h, x);
|
||
let d = (y * w + x) * 4;
|
||
match (and_bit, xor_bit) {
|
||
(0, 0) => {
|
||
// opaque black: BGR already 0, just mark opaque
|
||
alpha[d + 3] = 255;
|
||
any_alpha = true;
|
||
}
|
||
(0, 1) => {
|
||
alpha[d] = 255;
|
||
alpha[d + 1] = 255;
|
||
alpha[d + 2] = 255;
|
||
alpha[d + 3] = 255;
|
||
any_alpha = true;
|
||
}
|
||
(1, 0) => {} // transparent
|
||
_ => {
|
||
// (1,1) invert screen → white opaque into the XOR layer
|
||
xor[d] = 255;
|
||
xor[d + 1] = 255;
|
||
xor[d + 2] = 255;
|
||
xor[d + 3] = 255;
|
||
any_xor = true;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
Some(CursorShape {
|
||
w: w as u32,
|
||
h: h as u32,
|
||
alpha: any_alpha.then_some(alpha),
|
||
xor: any_xor.then_some(xor),
|
||
})
|
||
}
|
||
}
|
||
|
||
/// CPU src-over alpha blend of a BGRA cursor into a BGRA frame buffer (software-encode path). When
|
||
/// `invert` is set (masked-color / XOR cursor), a covered pixel inverts the frame instead (true XOR).
|
||
#[allow(clippy::too_many_arguments)]
|
||
fn blend_cursor_cpu(
|
||
frame: &mut [u8],
|
||
fw: u32,
|
||
fh: u32,
|
||
cur: &[u8],
|
||
cw: u32,
|
||
ch: u32,
|
||
cx: i32,
|
||
cy: i32,
|
||
invert: bool,
|
||
) {
|
||
let (fw, fh, cw, ch) = (fw as i32, fh as i32, cw as i32, ch as i32);
|
||
for y in 0..ch {
|
||
let fy = cy + y;
|
||
if fy < 0 || fy >= fh {
|
||
continue;
|
||
}
|
||
for x in 0..cw {
|
||
let fx = cx + x;
|
||
if fx < 0 || fx >= fw {
|
||
continue;
|
||
}
|
||
let s = ((y * cw + x) * 4) as usize;
|
||
let a = cur[s + 3] as u32;
|
||
if a == 0 {
|
||
continue;
|
||
}
|
||
let d = ((fy * fw + fx) * 4) as usize;
|
||
if invert {
|
||
for k in 0..3 {
|
||
frame[d + k] = 255 - frame[d + k];
|
||
}
|
||
} else {
|
||
for k in 0..3 {
|
||
frame[d + k] =
|
||
((cur[s + k] as u32 * a + frame[d + k] as u32 * (255 - a)) / 255) as u8;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
pub struct DuplCapturer {
|
||
device: ID3D11Device,
|
||
context: ID3D11DeviceContext,
|
||
output: IDXGIOutput1,
|
||
dupl: IDXGIOutputDuplication,
|
||
/// The output's GDI name — re-resolved on ACCESS_LOST (a mode change can stale the cached handle).
|
||
gdi_name: String,
|
||
/// Stable SudoVDA target id, used to re-resolve `gdi_name` during recovery.
|
||
target_id: u32,
|
||
width: u32,
|
||
height: u32,
|
||
refresh_hz: u32,
|
||
staging: Option<ID3D11Texture2D>,
|
||
holding_frame: bool,
|
||
active: AtomicBool,
|
||
timeout_ms: u32,
|
||
/// The first AcquireNextFrame after a (re)DuplicateOutput gets a generous timeout — the initial
|
||
/// desktop snapshot of a large surface can take longer than the per-frame budget.
|
||
first_frame: bool,
|
||
dbg_timeouts: u32,
|
||
dbg_lost: u32,
|
||
dbg_black_seeds: u32,
|
||
last: Option<Vec<u8>>,
|
||
/// GPU-output mode (zero-copy → NVENC): produce `FramePayload::D3d11` instead of CPU BGRA.
|
||
/// Selected by `PUNKTFUNK_ENCODER=nvenc` so the capturer's output matches the encoder's input.
|
||
gpu_mode: bool,
|
||
/// Reused owned texture the duplication frame is copied into for the D3D11 path (the duplication
|
||
/// surface is transient and released each frame).
|
||
gpu_copy: Option<ID3D11Texture2D>,
|
||
/// The most recently produced presentable GPU texture + its pixel format, repeated by
|
||
/// `next_frame` when AcquireNextFrame reports no change (static desktop) or during a rebuild.
|
||
/// Format-tagged because the SDR path presents BGRA `gpu_copy` while the HDR path presents the
|
||
/// 10-bit `hdr10_out` — the encoder needs the right format on every frame.
|
||
last_present: Option<(ID3D11Texture2D, PixelFormat)>,
|
||
/// HDR (scRGB FP16) capture state. Set when the duplication surface is `R16G16B16A16_FLOAT`
|
||
/// (the desktop has HDR on). The frame can't be `CopyResource`d into a BGRA target, so the HDR
|
||
/// path copies it into an FP16 SRV texture, composites the cursor, then runs [`HdrConverter`] to
|
||
/// produce a BT.2020 PQ 10-bit (`R10G10B10A2`) frame for NVENC. Toggling HDR fires ACCESS_LOST →
|
||
/// `recreate_dupl` re-detects the format, so this tracks the *current* duplication.
|
||
hdr_fp16: bool,
|
||
/// FP16 copy of the duplication surface (RT|SRV): the cursor composites onto it and the converter
|
||
/// samples it. Reallocated on device/size change.
|
||
fp16_src: Option<ID3D11Texture2D>,
|
||
fp16_srv: Option<ID3D11ShaderResourceView>,
|
||
/// 10-bit `R10G10B10A2` PQ output of the HDR conversion — the texture handed to NVENC.
|
||
hdr10_out: Option<ID3D11Texture2D>,
|
||
/// scRGB→PQ conversion pass; rebuilt on device recreate.
|
||
hdr_conv: Option<HdrConverter>,
|
||
/// Last time a duplication rebuild was attempted, to throttle retries during an outage (e.g. a
|
||
/// secure-desktop dwell where the output is gone) so we don't block the encode loop or hammer
|
||
/// DuplicateOutput — between attempts the last good frame is repeated. `None` = never attempted.
|
||
last_rebuild: Option<Instant>,
|
||
/// Throttle for ALL ACCESS_LOST recovery attempts (cheap re-duplicate + full rebuild). A
|
||
/// constantly-invalidated duplication (HDR overlay/MPO churn) would otherwise spin recovery and
|
||
/// starve the encode thread; cap attempts to ~one per 5 ms and repeat the last frame between them.
|
||
last_recover: Option<Instant>,
|
||
/// True once at least one real frame has been produced. After that, a frame drought (e.g. a long
|
||
/// secure-desktop dwell with nothing rendering to the virtual output) must never fatally end the
|
||
/// session — `next_frame` keeps repeating the last/seeded frame instead of erroring on its
|
||
/// deadline. The deadline stays fatal only *before* the first frame (a genuine startup misconfig).
|
||
ever_got_frame: bool,
|
||
/// GPU cursor overlay (rebuilt on device recreate). `None` until the first composite.
|
||
cursor: Option<CursorCompositor>,
|
||
/// Last cursor shape, decomposed into alpha + XOR layers (kept device-independent so it survives
|
||
/// a device recreate).
|
||
cursor_shape: Option<CursorShape>,
|
||
cursor_pos: (i32, i32),
|
||
cursor_visible: bool,
|
||
/// Cursor shape changed → re-upload to the GPU texture(s) before the next composite.
|
||
cursor_dirty: bool,
|
||
dbg_cursor: u64,
|
||
_keepalive: Box<dyn Send>,
|
||
}
|
||
// COM objects used only from the one thread that owns the capturer (the encode thread).
|
||
unsafe impl Send for DuplCapturer {}
|
||
|
||
impl DuplCapturer {
|
||
pub fn open(
|
||
target: WinCaptureTarget,
|
||
preferred: Option<(u32, u32, u32)>,
|
||
keepalive: Box<dyn Send>,
|
||
) -> Result<Self> {
|
||
unsafe {
|
||
// Stop DXGI hybrid-GPU output reparenting BEFORE we create the factory / enumerate outputs
|
||
// (the cause of the 0x887A0026 ACCESS_LOST churn on this hybrid box: RTX 4090 + AMD iGPU).
|
||
install_gpu_pref_hook();
|
||
let factory: IDXGIFactory1 = CreateDXGIFactory1().context("CreateDXGIFactory1")?;
|
||
// 1) Find the output (monitor) whose GDI DeviceName matches, across ALL adapters. On a
|
||
// real-GPU box the SudoVDA virtual monitor's DXGI output is enumerated under the GPU that
|
||
// *renders* it (the discrete/integrated GPU), NOT under the SudoVDA "adapter" LUID that
|
||
// SudoVDA reports — so we can't restrict the search to `target.adapter_luid`. The output
|
||
// also appears a beat after the display is created, so settle-retry for up to ~2 s.
|
||
// `target.adapter_luid` is kept only as a tie-break preference (matched adapter first).
|
||
let _ = target.adapter_luid;
|
||
let deadline = Instant::now() + Duration::from_millis(2000);
|
||
let (adapter, output): (IDXGIAdapter1, IDXGIOutput1) = loop {
|
||
let mut hit = None;
|
||
let mut i = 0u32;
|
||
while let Ok(a) = factory.EnumAdapters1(i) {
|
||
let ad = a.GetDesc1()?;
|
||
let aname = String::from_utf16_lossy(&ad.Description);
|
||
let aname = aname.trim_end_matches('\u{0}');
|
||
let mut j = 0u32;
|
||
while let Ok(o) = a.EnumOutputs(j) {
|
||
let od = o.GetDesc()?;
|
||
let oname = String::from_utf16_lossy(&od.DeviceName);
|
||
let oname = oname.trim_end_matches('\u{0}').to_string();
|
||
tracing::debug!(
|
||
adapter = aname,
|
||
luid = format!("{:#x}", pack_luid(ad.AdapterLuid)),
|
||
output = oname,
|
||
want = target.gdi_name,
|
||
"DXGI output seen"
|
||
);
|
||
if gdi_name_matches(&od.DeviceName, &target.gdi_name) {
|
||
tracing::info!(
|
||
adapter = aname,
|
||
luid = format!("{:#x}", pack_luid(ad.AdapterLuid)),
|
||
output = oname,
|
||
"capturing the SudoVDA output on this adapter"
|
||
);
|
||
hit = Some((a.clone(), o.cast::<IDXGIOutput1>()?));
|
||
break;
|
||
}
|
||
j += 1;
|
||
}
|
||
if hit.is_some() {
|
||
break;
|
||
}
|
||
i += 1;
|
||
}
|
||
if let Some(h) = hit {
|
||
break h;
|
||
}
|
||
if Instant::now() >= deadline {
|
||
let mut topo = Vec::new();
|
||
let mut i = 0u32;
|
||
while let Ok(a) = factory.EnumAdapters1(i) {
|
||
let ad = a.GetDesc1()?;
|
||
let an = String::from_utf16_lossy(&ad.Description);
|
||
let mut outs = Vec::new();
|
||
let mut j = 0u32;
|
||
while let Ok(o) = a.EnumOutputs(j) {
|
||
let od = o.GetDesc()?;
|
||
outs.push(
|
||
String::from_utf16_lossy(&od.DeviceName)
|
||
.trim_end_matches('\u{0}')
|
||
.to_string(),
|
||
);
|
||
j += 1;
|
||
}
|
||
topo.push(format!(
|
||
"{} [{:#x}]: {:?}",
|
||
an.trim_end_matches('\u{0}'),
|
||
pack_luid(ad.AdapterLuid),
|
||
outs
|
||
));
|
||
i += 1;
|
||
}
|
||
bail!(
|
||
"no DXGI adapter exposes output {} (topology: {})",
|
||
target.gdi_name,
|
||
topo.join(" | ")
|
||
);
|
||
}
|
||
std::thread::sleep(Duration::from_millis(100));
|
||
};
|
||
// 2) D3D11 device ON the adapter that exposes the output (driver_type MUST be UNKNOWN with
|
||
// an explicit adapter). NVENC binds to this same device for zero-copy encode.
|
||
let mut device: Option<ID3D11Device> = None;
|
||
let mut context: Option<ID3D11DeviceContext> = None;
|
||
D3D11CreateDevice(
|
||
&adapter,
|
||
D3D_DRIVER_TYPE_UNKNOWN,
|
||
HMODULE::default(),
|
||
D3D11_CREATE_DEVICE_BGRA_SUPPORT,
|
||
Some(&[D3D_FEATURE_LEVEL_11_0]),
|
||
D3D11_SDK_VERSION,
|
||
Some(&mut device),
|
||
None,
|
||
Some(&mut context),
|
||
)
|
||
.context("D3D11CreateDevice")?;
|
||
let device = device.context("null D3D11 device")?;
|
||
let context = context.context("null D3D11 context")?;
|
||
// 3) duplicate the output. Attach to the current input desktop first (as SYSTEM this can
|
||
// be the Winlogon secure desktop) so a session that starts at the lock/login screen works,
|
||
// and re-assert display isolation at OPEN time (not just in recovery): a lock/UAC switch can
|
||
// re-attach a physical monitor and route the secure desktop THERE, leaving our virtual
|
||
// output perpetually idle/lost — re-isolating forces the secure desktop back onto it. Cheap
|
||
// + idempotent (a no-op when nothing else is attached).
|
||
attach_input_desktop();
|
||
crate::vdisplay::sudovda::reassert_isolation(&target.gdi_name);
|
||
let dupl = output
|
||
.DuplicateOutput(&device)
|
||
.context("DuplicateOutput (already duplicated by another app?)")?;
|
||
// Kick the first frame loose: a blank virtual display is otherwise change-less.
|
||
nudge_cursor_onto(&output);
|
||
let dd: DXGI_OUTDUPL_DESC = dupl.GetDesc();
|
||
let (width, height) = (dd.ModeDesc.Width, dd.ModeDesc.Height);
|
||
let refresh_hz = preferred
|
||
.map(|(_, _, hz)| hz)
|
||
.filter(|&hz| hz > 0)
|
||
.unwrap_or_else(|| {
|
||
let r = dd.ModeDesc.RefreshRate;
|
||
r.Numerator
|
||
.checked_div(r.Denominator)
|
||
.map_or(60, |hz| hz.max(1))
|
||
});
|
||
let timeout_ms = std::env::var("PUNKTFUNK_CAPTURE_TIMEOUT_MS")
|
||
.ok()
|
||
.and_then(|s| s.parse().ok())
|
||
.unwrap_or((2000 / refresh_hz.max(1)).max(100));
|
||
let gpu_mode = std::env::var("PUNKTFUNK_ENCODER")
|
||
.map(|v| matches!(v.to_ascii_lowercase().as_str(), "nvenc" | "hw" | "nvidia"))
|
||
.unwrap_or(false);
|
||
tracing::info!(
|
||
"DXGI duplication: {}x{}@{} on {} ({}) dxgi_format={} (87=BGRA8 24=R10G10B10A2 10=R16G16B16A16_FLOAT)",
|
||
width,
|
||
height,
|
||
refresh_hz,
|
||
target.gdi_name,
|
||
if gpu_mode {
|
||
"D3D11 zero-copy"
|
||
} else {
|
||
"CPU staging"
|
||
},
|
||
dd.ModeDesc.Format.0,
|
||
);
|
||
Ok(Self {
|
||
device,
|
||
context,
|
||
output,
|
||
dupl,
|
||
target_id: target.target_id,
|
||
gdi_name: target.gdi_name,
|
||
width,
|
||
height,
|
||
refresh_hz,
|
||
staging: None,
|
||
holding_frame: false,
|
||
active: AtomicBool::new(false),
|
||
timeout_ms,
|
||
first_frame: true,
|
||
dbg_timeouts: 0,
|
||
dbg_lost: 0,
|
||
dbg_black_seeds: 0,
|
||
last: None,
|
||
gpu_mode,
|
||
gpu_copy: None,
|
||
last_present: None,
|
||
hdr_fp16: dd.ModeDesc.Format == DXGI_FORMAT_R16G16B16A16_FLOAT,
|
||
fp16_src: None,
|
||
fp16_srv: None,
|
||
hdr10_out: None,
|
||
hdr_conv: None,
|
||
last_rebuild: None,
|
||
last_recover: None,
|
||
ever_got_frame: false,
|
||
cursor: None,
|
||
cursor_shape: None,
|
||
cursor_pos: (0, 0),
|
||
cursor_visible: false,
|
||
cursor_dirty: false,
|
||
dbg_cursor: 0,
|
||
_keepalive: keepalive,
|
||
})
|
||
}
|
||
}
|
||
|
||
unsafe fn ensure_staging(&mut self) -> Result<()> {
|
||
if self.staging.is_some() {
|
||
return Ok(());
|
||
}
|
||
let desc = D3D11_TEXTURE2D_DESC {
|
||
Width: self.width,
|
||
Height: self.height,
|
||
MipLevels: 1,
|
||
ArraySize: 1,
|
||
Format: DXGI_FORMAT_B8G8R8A8_UNORM,
|
||
SampleDesc: DXGI_SAMPLE_DESC {
|
||
Count: 1,
|
||
Quality: 0,
|
||
},
|
||
Usage: D3D11_USAGE_STAGING,
|
||
BindFlags: D3D11_BIND_FLAG(0).0 as u32,
|
||
CPUAccessFlags: D3D11_CPU_ACCESS_READ.0 as u32,
|
||
MiscFlags: 0,
|
||
};
|
||
let mut t: Option<ID3D11Texture2D> = None;
|
||
self.device
|
||
.CreateTexture2D(&desc, None, Some(&mut t))
|
||
.context("CreateTexture2D(staging)")?;
|
||
self.staging = t;
|
||
Ok(())
|
||
}
|
||
|
||
unsafe fn ensure_gpu_copy(&mut self) -> Result<()> {
|
||
if self.gpu_copy.is_some() {
|
||
return Ok(());
|
||
}
|
||
let desc = D3D11_TEXTURE2D_DESC {
|
||
Width: self.width,
|
||
Height: self.height,
|
||
MipLevels: 1,
|
||
ArraySize: 1,
|
||
Format: DXGI_FORMAT_B8G8R8A8_UNORM,
|
||
SampleDesc: DXGI_SAMPLE_DESC {
|
||
Count: 1,
|
||
Quality: 0,
|
||
},
|
||
Usage: D3D11_USAGE_DEFAULT,
|
||
BindFlags: D3D11_BIND_RENDER_TARGET.0 as u32,
|
||
CPUAccessFlags: 0,
|
||
MiscFlags: 0,
|
||
};
|
||
let mut t: Option<ID3D11Texture2D> = None;
|
||
self.device
|
||
.CreateTexture2D(&desc, None, Some(&mut t))
|
||
.context("CreateTexture2D(gpu copy)")?;
|
||
self.gpu_copy = t;
|
||
Ok(())
|
||
}
|
||
|
||
/// FP16 (`R16G16B16A16_FLOAT`) copy of the HDR duplication surface (RT for the cursor composite +
|
||
/// SRV for the converter). Reallocated when absent (device/size change drops it).
|
||
unsafe fn ensure_fp16_src(&mut self) -> Result<()> {
|
||
if self.fp16_src.is_some() {
|
||
return Ok(());
|
||
}
|
||
let desc = D3D11_TEXTURE2D_DESC {
|
||
Width: self.width,
|
||
Height: self.height,
|
||
MipLevels: 1,
|
||
ArraySize: 1,
|
||
Format: DXGI_FORMAT_R16G16B16A16_FLOAT,
|
||
SampleDesc: DXGI_SAMPLE_DESC {
|
||
Count: 1,
|
||
Quality: 0,
|
||
},
|
||
Usage: D3D11_USAGE_DEFAULT,
|
||
BindFlags: (D3D11_BIND_RENDER_TARGET.0 | D3D11_BIND_SHADER_RESOURCE.0) as u32,
|
||
CPUAccessFlags: 0,
|
||
MiscFlags: 0,
|
||
};
|
||
let mut t: Option<ID3D11Texture2D> = None;
|
||
self.device
|
||
.CreateTexture2D(&desc, None, Some(&mut t))
|
||
.context("CreateTexture2D(fp16 src)")?;
|
||
let t = t.context("fp16 src tex")?;
|
||
let mut srv = None;
|
||
self.device
|
||
.CreateShaderResourceView(&t, None, Some(&mut srv))?;
|
||
self.fp16_srv = Some(srv.context("fp16 srv")?);
|
||
self.fp16_src = Some(t);
|
||
Ok(())
|
||
}
|
||
|
||
/// 10-bit `R10G10B10A2_UNORM` PQ output of the HDR conversion — the texture NVENC encodes.
|
||
unsafe fn ensure_hdr10_out(&mut self) -> Result<()> {
|
||
if self.hdr10_out.is_some() {
|
||
return Ok(());
|
||
}
|
||
let desc = D3D11_TEXTURE2D_DESC {
|
||
Width: self.width,
|
||
Height: self.height,
|
||
MipLevels: 1,
|
||
ArraySize: 1,
|
||
Format: DXGI_FORMAT_R10G10B10A2_UNORM,
|
||
SampleDesc: DXGI_SAMPLE_DESC {
|
||
Count: 1,
|
||
Quality: 0,
|
||
},
|
||
Usage: D3D11_USAGE_DEFAULT,
|
||
BindFlags: D3D11_BIND_RENDER_TARGET.0 as u32,
|
||
CPUAccessFlags: 0,
|
||
MiscFlags: 0,
|
||
};
|
||
let mut t: Option<ID3D11Texture2D> = None;
|
||
self.device
|
||
.CreateTexture2D(&desc, None, Some(&mut t))
|
||
.context("CreateTexture2D(hdr10 out)")?;
|
||
self.hdr10_out = t;
|
||
Ok(())
|
||
}
|
||
|
||
/// Allocate a presentable GPU texture on the *current* device, clear it to black, and record it
|
||
/// as `last_present`. Called after a desktop-switch recovery so `next_frame` always has a D3D11
|
||
/// frame to repeat even while the (secure) desktop renders nothing to the virtual output — this
|
||
/// is what keeps the session alive across a lock/login/UAC transition instead of dropping it. In
|
||
/// HDR mode it seeds the 10-bit output (black = PQ 0); otherwise the BGRA copy. One-shot: the next
|
||
/// real frame overwrites the texture in place.
|
||
unsafe fn seed_black_gpu_frame(&mut self) -> Result<()> {
|
||
// Instrumentation: a BLACK seed means we have no real desktop frame to show — if the client
|
||
// streams black, this is why. On the secure (Winlogon) desktop this fires when the duplication
|
||
// came back born-lost / idle. Counted + logged (throttled) so a real-lock repro shows the mode.
|
||
self.dbg_black_seeds += 1;
|
||
if self.dbg_black_seeds % 32 == 1 {
|
||
tracing::warn!(
|
||
black_seeds = self.dbg_black_seeds,
|
||
"DDA: seeding BLACK frame — no real desktop frame available (secure desktop idle/born-lost?)"
|
||
);
|
||
}
|
||
if self.hdr_fp16 {
|
||
self.ensure_hdr10_out()?;
|
||
let out = self.hdr10_out.clone().context("hdr10 out texture")?;
|
||
let mut rtv: Option<ID3D11RenderTargetView> = None;
|
||
self.device
|
||
.CreateRenderTargetView(&out, None, Some(&mut rtv))?;
|
||
self.context
|
||
.ClearRenderTargetView(&rtv.context("null RTV (hdr seed)")?, &[0.0, 0.0, 0.0, 1.0]);
|
||
self.last_present = Some((out, PixelFormat::Rgb10a2));
|
||
} else {
|
||
self.ensure_gpu_copy()?;
|
||
let gpu = self.gpu_copy.clone().context("gpu copy texture")?;
|
||
let mut rtv: Option<ID3D11RenderTargetView> = None;
|
||
self.device
|
||
.CreateRenderTargetView(&gpu, None, Some(&mut rtv))?;
|
||
self.context
|
||
.ClearRenderTargetView(&rtv.context("null RTV (sdr seed)")?, &[0.0, 0.0, 0.0, 1.0]);
|
||
self.last_present = Some((gpu, PixelFormat::Bgra));
|
||
}
|
||
Ok(())
|
||
}
|
||
|
||
/// Pull cursor position/visibility/shape out of the frame info (the HW cursor is NOT in the frame).
|
||
unsafe fn update_cursor(&mut self, info: &DXGI_OUTDUPL_FRAME_INFO) {
|
||
if info.LastMouseUpdateTime != 0 {
|
||
self.cursor_pos = (
|
||
info.PointerPosition.Position.x,
|
||
info.PointerPosition.Position.y,
|
||
);
|
||
self.cursor_visible = info.PointerPosition.Visible.as_bool();
|
||
}
|
||
if info.PointerShapeBufferSize > 0 {
|
||
let mut buf = vec![0u8; info.PointerShapeBufferSize as usize];
|
||
let mut required = 0u32;
|
||
let mut si = DXGI_OUTDUPL_POINTER_SHAPE_INFO::default();
|
||
if self
|
||
.dupl
|
||
.GetFramePointerShape(
|
||
info.PointerShapeBufferSize,
|
||
buf.as_mut_ptr() as *mut c_void,
|
||
&mut required,
|
||
&mut si,
|
||
)
|
||
.is_ok()
|
||
{
|
||
if let Some(shape) = convert_pointer_shape(&buf, &si) {
|
||
tracing::info!(
|
||
shape_type = si.Type,
|
||
size = format!("{}x{}", shape.w, shape.h),
|
||
alpha = shape.alpha.is_some(),
|
||
xor = shape.xor.is_some(),
|
||
"cursor shape captured"
|
||
);
|
||
self.cursor_shape = Some(shape);
|
||
self.cursor_dirty = true;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/// Composite the cursor onto the GPU frame texture (zero-copy path). `hdr` = the target is the
|
||
/// linear scRGB FP16 surface (HDR path) — the cursor is then sRGB→linear decoded and scaled to
|
||
/// HDR graphics white (PUNKTFUNK_HDR_CURSOR_NITS, default 203, per BT.2408) so it isn't ~2.5×
|
||
/// too dim; SDR composites the raw cursor in the display's native sRGB space.
|
||
unsafe fn composite_cursor_gpu(&mut self, gpu: &ID3D11Texture2D, hdr: bool) -> Result<()> {
|
||
// Diagnostic kill-switch: skip the GPU cursor composite entirely (PUNKTFUNK_NO_CURSOR=1) to
|
||
// isolate its cost on the 3D engine. The per-frame render-target view + draw to the 5K target
|
||
// is the suspect for the high 3D usage under heavy desktop change.
|
||
if std::env::var_os("PUNKTFUNK_NO_CURSOR").is_some() {
|
||
return Ok(());
|
||
}
|
||
self.dbg_cursor += 1;
|
||
if self.dbg_cursor % 240 == 1 {
|
||
tracing::debug!(
|
||
visible = self.cursor_visible,
|
||
pos = format!("{:?}", self.cursor_pos),
|
||
shape = self
|
||
.cursor_shape
|
||
.as_ref()
|
||
.map(|s| format!("{}x{}", s.w, s.h)),
|
||
"cursor state"
|
||
);
|
||
}
|
||
if !self.cursor_visible || self.cursor_shape.is_none() {
|
||
return Ok(());
|
||
}
|
||
if self.cursor.is_none() {
|
||
self.cursor = Some(CursorCompositor::new(&self.device)?);
|
||
self.cursor_dirty = true; // fresh device → must (re)upload the shape texture
|
||
}
|
||
if self.cursor_dirty {
|
||
if let Some(shape) = &self.cursor_shape {
|
||
self.cursor
|
||
.as_mut()
|
||
.unwrap()
|
||
.set_shapes(&self.device, shape)?;
|
||
}
|
||
self.cursor_dirty = false;
|
||
}
|
||
let mut rtv: Option<ID3D11RenderTargetView> = None;
|
||
self.device
|
||
.CreateRenderTargetView(gpu, None, Some(&mut rtv))?;
|
||
let rtv = rtv.context("cursor rtv")?;
|
||
let (cx, cy) = self.cursor_pos;
|
||
// HDR graphics-white target in nits → scRGB multiplier (scRGB 1.0 = 80 nits). Default 203
|
||
// (BT.2408); PUNKTFUNK_HDR_CURSOR_NITS overrides without a rebuild. SDR → 1.0, no decode.
|
||
let white_mul = if hdr {
|
||
let nits = std::env::var("PUNKTFUNK_HDR_CURSOR_NITS")
|
||
.ok()
|
||
.and_then(|s| s.parse::<f32>().ok())
|
||
.filter(|n| n.is_finite() && *n > 0.0)
|
||
.unwrap_or(203.0);
|
||
nits / 80.0
|
||
} else {
|
||
1.0
|
||
};
|
||
let (w, h) = (self.width, self.height);
|
||
let comp = self.cursor.as_ref().unwrap();
|
||
// Alpha-blended layer (normal cursor pixels); HDR brightness scale applies here.
|
||
if let Some((srv, cw, ch)) = &comp.tex_alpha {
|
||
comp.draw_layer(
|
||
&self.context,
|
||
&rtv,
|
||
w,
|
||
h,
|
||
cx,
|
||
cy,
|
||
srv,
|
||
*cw,
|
||
*ch,
|
||
false,
|
||
white_mul,
|
||
hdr, // decode sRGB→linear only on the HDR (linear FP16) target
|
||
);
|
||
}
|
||
// Inversion layer (masked-color I-beam bar / monochrome invert): operates on the framebuffer
|
||
// reference, so it is never HDR-scaled or sRGB-decoded.
|
||
if let Some((srv, cw, ch)) = &comp.tex_xor {
|
||
comp.draw_layer(
|
||
&self.context,
|
||
&rtv,
|
||
w,
|
||
h,
|
||
cx,
|
||
cy,
|
||
srv,
|
||
*cw,
|
||
*ch,
|
||
true,
|
||
1.0,
|
||
false,
|
||
);
|
||
}
|
||
Ok(())
|
||
}
|
||
|
||
/// CHEAP recovery for the ACCESS_LOST *churn*: re-`DuplicateOutput` on the EXISTING device +
|
||
/// output. No new device/factory, so the encoder is NOT re-initialized and no black is seeded —
|
||
/// the existing `gpu_copy`/HDR textures/`last_present` are kept and frames resume immediately. This
|
||
/// is the right recovery for the HDR overlay-flip churn (the duplication is invalidated but the
|
||
/// output is still live). Returns false when the output can't be re-duplicated (desktop switch /
|
||
/// output gone) so the caller falls back to the full [`recreate_dupl`]. Probes the new duplication
|
||
/// (like recreate_dupl) so a born-lost one is rejected rather than adopted.
|
||
unsafe fn try_reduplicate(&mut self) -> bool {
|
||
if self.holding_frame {
|
||
let _ = self.dupl.ReleaseFrame();
|
||
self.holding_frame = false;
|
||
}
|
||
let dupl = match self.output.DuplicateOutput(&self.device) {
|
||
Ok(d) => d,
|
||
Err(_) => return false,
|
||
};
|
||
// Adopt first (SAME device → existing gpu_copy/HDR textures/last_present stay valid), then probe
|
||
// + CAPTURE the frame: a born-lost duplication returns ACCESS_LOST immediately; alive-but-idle
|
||
// waits the full 16ms. On a real frame we present it (so a static desktop keeps a real
|
||
// last_present instead of the discarded one); idle keeps the existing last_present.
|
||
self.dupl = dupl;
|
||
let mut info = DXGI_OUTDUPL_FRAME_INFO::default();
|
||
let mut res: Option<IDXGIResource> = None;
|
||
match self.dupl.AcquireNextFrame(16, &mut info, &mut res) {
|
||
Ok(()) => {
|
||
self.update_cursor(&info);
|
||
if let Some(r) = res {
|
||
let _ = self.present_acquired(r);
|
||
}
|
||
}
|
||
Err(e) if e.code() == DXGI_ERROR_WAIT_TIMEOUT => {}
|
||
Err(_) => return false, // born-lost on the same output → need the full rebuild
|
||
}
|
||
true
|
||
}
|
||
|
||
/// ONE rebuild attempt — deliberately non-blocking. ACCESS_LOST fires on desktop switches
|
||
/// (normal ↔ Winlogon secure: lock/login/UAC) and on the mode change we issue at create. We
|
||
/// re-attach to the now-current input desktop and recreate the D3D11 device + duplication on it
|
||
/// (a device made on the previous desktop can't sustain a duplication on the new one). CRUCIAL:
|
||
/// no internal multi-second retry loop — during a secure-desktop dwell the SudoVDA output is
|
||
/// *gone* (`no DXGI output named …`), and a blocking retry here would starve the encode/send
|
||
/// loop of frames for seconds, so the client times out and disconnects (the bug this fixes).
|
||
/// Instead a single attempt returns immediately; the caller ([`acquire`]) repeats the last good
|
||
/// frame and retries on a throttle, so the session survives an arbitrarily long secure visit.
|
||
unsafe fn recreate_dupl(&mut self) -> Result<()> {
|
||
if self.holding_frame {
|
||
let _ = self.dupl.ReleaseFrame();
|
||
self.holding_frame = false;
|
||
}
|
||
// The SudoVDA output's GDI name can CHANGE across a secure-desktop topology rebuild —
|
||
// re-resolve from the STABLE target id so we find it under its current name.
|
||
if let Some(n) = crate::vdisplay::sudovda::resolve_gdi_name(self.target_id) {
|
||
self.gdi_name = n;
|
||
}
|
||
// Heavy topology work — re-attach the thread to the input desktop AND re-isolate the virtual
|
||
// output — ONLY on the actual secure (Winlogon) desktop. Entering it can re-attach a physical
|
||
// monitor and move the secure desktop off our virtual output, which re-isolation fixes. But on
|
||
// the NORMAL desktop this is just routine ACCESS_LOST churn (HDR overlay / MPO / periodic IddCx
|
||
// invalidation), and re-isolating there is a DISPLAY-TOPOLOGY CHANGE that itself invalidates the
|
||
// freshly-rebuilt duplication → a self-feeding ACCESS_LOST storm (200 rebuilds/session observed).
|
||
// Apollo isolates once at startup and its recovery just re-duplicates; match that off the secure
|
||
// desktop. (The lock screen / post-login are NOT Winlogon, so they take this light path too.)
|
||
if crate::capture::desktop_watch::is_secure_desktop() {
|
||
attach_input_desktop();
|
||
crate::vdisplay::sudovda::reassert_isolation(&self.gdi_name);
|
||
}
|
||
let (dev, ctx, out, dupl) = reopen_duplication(&self.gdi_name)?; // Err → caller repeats + retries
|
||
|
||
// (The born-lost guard is now the capture-acquire at the end: we adopt, then grab the current
|
||
// frame; ACCESS_LOST there means born-lost, and we seed black + let the throttled caller retry.)
|
||
// A desktop switch can come back at a different size (e.g. the user session applies its own
|
||
// resolution on login). Adopt it: update dimensions and drop the staging/gpu copies so they
|
||
// reallocate. NVENC re-inits at the new size when it sees the frame.
|
||
let dd: DXGI_OUTDUPL_DESC = dupl.GetDesc();
|
||
let (nw, nh) = (dd.ModeDesc.Width, dd.ModeDesc.Height);
|
||
tracing::info!(
|
||
dxgi_format = dd.ModeDesc.Format.0,
|
||
"DXGI duplication rebuilt (format: 87=BGRA8 24=R10G10B10A2 10=R16G16B16A16_FLOAT)"
|
||
);
|
||
if nw != self.width || nh != self.height {
|
||
tracing::info!(
|
||
old = format!("{}x{}", self.width, self.height),
|
||
new = format!("{nw}x{nh}"),
|
||
"DXGI duplication size changed across switch"
|
||
);
|
||
self.width = nw;
|
||
self.height = nh;
|
||
self.staging = None;
|
||
}
|
||
self.device = dev;
|
||
self.context = ctx;
|
||
self.output = out;
|
||
self.dupl = dupl;
|
||
self.gpu_copy = None; // stale: belonged to the old device
|
||
self.cursor = None; // shaders/textures belonged to the old device; rebuilt on demand
|
||
self.last_present = None; // belonged to the old device; reseeded below
|
||
// Re-detect HDR and drop the HDR textures/converter (old device). Toggling HDR on or
|
||
// off is exactly this path: the duplication comes back as FP16 (HDR) or BGRA8.
|
||
self.hdr_fp16 = dd.ModeDesc.Format == DXGI_FORMAT_R16G16B16A16_FLOAT;
|
||
self.fp16_src = None;
|
||
self.fp16_srv = None;
|
||
self.hdr10_out = None;
|
||
self.hdr_conv = None;
|
||
self.first_frame = true;
|
||
// Capture the CURRENT desktop frame as `last_present` (instead of seeding black). The secure
|
||
// (lock/login/UAC) desktop is STATIC, so DDA only emits a frame on change — if we seeded black
|
||
// we'd stream black until the user pressed a key (the reported bug). A freshly-created
|
||
// duplication's first AcquireNextFrame returns the full current desktop; grab it and present it,
|
||
// so the client shows the real (frozen-until-it-changes) secure desktop. Born-lost (ACCESS_LOST
|
||
// here) or no-initial-frame (timeout) → seed black as a fallback and let the throttled caller
|
||
// retry — a brief black flash during the unsettled switch, then real content.
|
||
nudge_cursor_onto(&self.output); // kick a change so a static desktop yields its first frame
|
||
let mut info = DXGI_OUTDUPL_FRAME_INFO::default();
|
||
let mut res: Option<IDXGIResource> = None;
|
||
let captured = match self.dupl.AcquireNextFrame(120, &mut info, &mut res) {
|
||
Ok(()) => {
|
||
self.update_cursor(&info);
|
||
match res {
|
||
Some(r) => match self.present_acquired(r) {
|
||
Ok(_) => {
|
||
self.first_frame = false;
|
||
tracing::info!("DXGI recovery: captured real secure-desktop frame");
|
||
true
|
||
}
|
||
Err(e) => {
|
||
tracing::warn!(error = %format!("{e:#}"), "recovery: present_acquired failed");
|
||
false
|
||
}
|
||
},
|
||
None => false,
|
||
}
|
||
}
|
||
Err(e) => {
|
||
tracing::warn!(
|
||
code = format!("{:#x}", e.code().0),
|
||
"DXGI recovery: no initial frame (born-lost/idle) — seeding black, will retry"
|
||
);
|
||
false
|
||
}
|
||
};
|
||
if !captured && self.gpu_mode {
|
||
if let Err(e) = self.seed_black_gpu_frame() {
|
||
tracing::warn!(error = %format!("{e:#}"), "seed black frame after recovery failed");
|
||
}
|
||
}
|
||
Ok(())
|
||
}
|
||
|
||
/// Acquire one frame: `Some` on a fresh image, `None` on timeout (no change → caller reuses last).
|
||
unsafe fn acquire(&mut self) -> Result<Option<CapturedFrame>> {
|
||
if self.holding_frame {
|
||
let _ = self.dupl.ReleaseFrame();
|
||
self.holding_frame = false;
|
||
}
|
||
let mut info = DXGI_OUTDUPL_FRAME_INFO::default();
|
||
let mut res: Option<IDXGIResource> = None;
|
||
let timeout = if self.first_frame {
|
||
2000
|
||
} else {
|
||
self.timeout_ms
|
||
};
|
||
match self.dupl.AcquireNextFrame(timeout, &mut info, &mut res) {
|
||
Ok(()) => {
|
||
if self.first_frame {
|
||
tracing::info!(w = self.width, h = self.height, "DXGI first frame acquired");
|
||
self.first_frame = false;
|
||
}
|
||
self.update_cursor(&info);
|
||
}
|
||
Err(e) if e.code() == DXGI_ERROR_WAIT_TIMEOUT => {
|
||
self.dbg_timeouts += 1;
|
||
if self.dbg_timeouts % 40 == 1 {
|
||
tracing::warn!(
|
||
timeouts = self.dbg_timeouts,
|
||
first_frame = self.first_frame,
|
||
"DXGI AcquireNextFrame timeout (no desktop change yet)"
|
||
);
|
||
}
|
||
return Ok(None);
|
||
}
|
||
// Recoverable losses, ALL handled by rebuilding the duplication (device + re-DuplicateOutput):
|
||
// ACCESS_LOST — desktop switch (normal <-> Winlogon secure: lock/login/UAC) or mode change
|
||
// INVALID_CALL — the secure->user-desktop switch (post-login) leaves the duplication in a
|
||
// state where AcquireNextFrame returns 0x887A0001; recreating recovers it.
|
||
// Previously fatal -> the stream dropped the instant the user logged in.
|
||
// DEVICE_REMOVED/RESET — GPU TDR / driver reset.
|
||
Err(e)
|
||
if e.code() == DXGI_ERROR_ACCESS_LOST
|
||
|| e.code() == DXGI_ERROR_INVALID_CALL
|
||
|| e.code() == DXGI_ERROR_DEVICE_REMOVED
|
||
|| e.code() == DXGI_ERROR_DEVICE_RESET =>
|
||
{
|
||
self.dbg_lost += 1;
|
||
// TIERED recovery. The HDR path produces a constant ACCESS_LOST *churn*: the
|
||
// duplication keeps getting invalidated (overlay/MPO flips that HDR makes aggressive)
|
||
// but the OUTPUT stays valid — a probe passes, the dup lives briefly, dies, repeats.
|
||
// For that, the cheap fix is a fresh DuplicateOutput on the SAME device+output: no new
|
||
// device/factory → NO encoder re-init, NO black seed → frames stay near-continuous
|
||
// (this is what makes HDR animations smooth). Only a genuine output loss (secure-desktop
|
||
// switch, where DISPLAY10 is gone) or a dead device needs the full rebuild — and THAT
|
||
// is throttled so a long secure dwell doesn't hammer DuplicateOutput / starve the
|
||
// client (between attempts we repeat the last frame).
|
||
let device_dead =
|
||
e.code() == DXGI_ERROR_DEVICE_REMOVED || e.code() == DXGI_ERROR_DEVICE_RESET;
|
||
if self.dbg_lost % 64 == 1 {
|
||
tracing::warn!(
|
||
lost = self.dbg_lost,
|
||
code = format!("{:#x}", e.code().0),
|
||
"DXGI capture lost — recovering (cheap re-duplicate, full rebuild if output gone)"
|
||
);
|
||
}
|
||
// Back off: under aggressive HDR overlay/MPO invalidation the duplication dies
|
||
// continuously, and an unthrottled recovery would spin try_reduplicate (each a
|
||
// DuplicateOutput + up-to-16 ms Acquire) and starve the encode thread → freeze. Cap ALL
|
||
// recovery attempts to ~one per 5 ms; between attempts return None so the caller repeats
|
||
// the last frame, paced at the frame interval (no busy-spin, encode thread keeps running).
|
||
let now = Instant::now();
|
||
if self
|
||
.last_recover
|
||
.is_some_and(|t| now.duration_since(t) < Duration::from_millis(5))
|
||
{
|
||
return Ok(None);
|
||
}
|
||
self.last_recover = Some(now);
|
||
if !device_dead && self.try_reduplicate() {
|
||
// Cheap recovery succeeded; the next acquire gets frames on the same device.
|
||
self.first_frame = true;
|
||
return Ok(None);
|
||
}
|
||
// Output gone / device dead → full rebuild (new device), throttled.
|
||
let now = Instant::now();
|
||
let due = self.last_rebuild.map_or(true, |t| {
|
||
now.duration_since(t) >= Duration::from_millis(250)
|
||
});
|
||
if due {
|
||
self.last_rebuild = Some(now);
|
||
if self.recreate_dupl().is_ok() {
|
||
self.first_frame = true;
|
||
}
|
||
} else {
|
||
std::thread::sleep(Duration::from_millis(8));
|
||
}
|
||
return Ok(None);
|
||
}
|
||
Err(e) => return Err(e).context("AcquireNextFrame"),
|
||
}
|
||
let res = res.context("AcquireNextFrame: null resource")?;
|
||
// Detect a mode/format change on the hot path. The desktop can flip HDR<->SDR (FP16<->BGRA —
|
||
// e.g. the SudoVDA output dropping out of HDR for the secure desktop) or change resolution
|
||
// WITHOUT raising ACCESS_LOST; `hdr_fp16`/`width`/`height` would then be stale and
|
||
// `present_acquired` would CopyResource into a mismatched-format/size target — corruption, or
|
||
// the secure-desktop "works once, then HDR breaks" bug. Re-read the acquired texture's desc
|
||
// every frame (Apollo does this) and rebuild on a real change instead of presenting a
|
||
// mismatched frame. Throttled like the ACCESS_LOST path so a flapping toggle can't hammer
|
||
// DuplicateOutput.
|
||
if let Ok(tex) = res.cast::<ID3D11Texture2D>() {
|
||
let mut d = D3D11_TEXTURE2D_DESC::default();
|
||
tex.GetDesc(&mut d);
|
||
// Only a real SIZE change is reliably detectable here. Format/HDR is NOT: legacy
|
||
// DuplicateOutput always hands back an 8-bit BGRA surface regardless of the output's FP16
|
||
// scanout mode, so comparing the acquired-texture format against `hdr_fp16` (derived from
|
||
// the OUTDUPL ModeDesc) self-fires every frame → a rebuild storm. A genuine resolution
|
||
// change is caught here; a real HDR↔SDR toggle arrives as ACCESS_LOST → recreate_dupl
|
||
// re-detects it. (Genuine FP16 capture is a separate change: DuplicateOutput1.)
|
||
if d.Width != self.width || d.Height != self.height {
|
||
tracing::info!(
|
||
old = format!("{}x{}", self.width, self.height),
|
||
new = format!("{}x{}", d.Width, d.Height),
|
||
"DXGI capture size changed mid-stream — rebuilding"
|
||
);
|
||
let _ = self.dupl.ReleaseFrame();
|
||
let now = Instant::now();
|
||
let due = self
|
||
.last_rebuild
|
||
.map_or(true, |t| now.duration_since(t) >= Duration::from_millis(250));
|
||
if due {
|
||
self.last_rebuild = Some(now);
|
||
if self.recreate_dupl().is_ok() {
|
||
self.first_frame = true;
|
||
}
|
||
}
|
||
return Ok(None);
|
||
}
|
||
}
|
||
Ok(Some(self.present_acquired(res)?))
|
||
}
|
||
|
||
/// Turn a freshly-acquired duplication resource into a `CapturedFrame` and record it as
|
||
/// `last_present`. Factored out of [`acquire`] so the recovery path ([`recreate_dupl`]) can grab
|
||
/// the CURRENT desktop frame instead of seeding black: the secure (lock/login/UAC) desktop is
|
||
/// static, so DDA emits no change-frame to replace a black seed — the cause of the black-screen-
|
||
/// until-you-press-a-key bug. The caller has already `AcquireNextFrame`d; this releases it.
|
||
unsafe fn present_acquired(&mut self, res: IDXGIResource) -> Result<CapturedFrame> {
|
||
self.holding_frame = true;
|
||
let tex: ID3D11Texture2D = res.cast().context("resource -> Texture2D")?;
|
||
if self.gpu_mode && self.hdr_fp16 {
|
||
// HDR zero-copy path: the duplication surface is scRGB FP16 (R16G16B16A16_FLOAT) — it can't
|
||
// be CopyResource'd into a BGRA target (that was the freeze + cursor-trail bug). Copy it into
|
||
// an FP16 SRV texture (same format → valid), composite the cursor onto it (the cursor lands
|
||
// at ~SDR-white brightness, then goes through the PQ curve correctly), then convert scRGB →
|
||
// BT.2020 PQ 10-bit into hdr10_out and hand THAT to NVENC (HEVC Main10 / HDR10).
|
||
self.ensure_fp16_src()?;
|
||
let src = self.fp16_src.clone().context("fp16 src texture")?;
|
||
self.context.CopyResource(&src, &tex);
|
||
let _ = self.dupl.ReleaseFrame();
|
||
self.holding_frame = false;
|
||
self.composite_cursor_gpu(&src, true)?; // onto the FP16 surface (HDR: decode + nits scale)
|
||
self.ensure_hdr10_out()?;
|
||
let out = self.hdr10_out.clone().context("hdr10 out texture")?;
|
||
if self.hdr_conv.is_none() {
|
||
self.hdr_conv = Some(HdrConverter::new(&self.device)?);
|
||
}
|
||
let srv = self.fp16_srv.clone().context("fp16 srv")?;
|
||
let mut rtv: Option<ID3D11RenderTargetView> = None;
|
||
self.device
|
||
.CreateRenderTargetView(&out, None, Some(&mut rtv))?;
|
||
let rtv = rtv.context("hdr10 rtv")?;
|
||
self.hdr_conv.as_ref().unwrap().convert(
|
||
&self.context,
|
||
&srv,
|
||
&rtv,
|
||
self.width,
|
||
self.height,
|
||
);
|
||
self.last_present = Some((out.clone(), PixelFormat::Rgb10a2));
|
||
return Ok(CapturedFrame {
|
||
width: self.width,
|
||
height: self.height,
|
||
pts_ns: now_ns(),
|
||
format: PixelFormat::Rgb10a2,
|
||
payload: FramePayload::D3d11(D3d11Frame {
|
||
texture: out,
|
||
device: self.device.clone(),
|
||
}),
|
||
});
|
||
}
|
||
if self.gpu_mode {
|
||
// Zero-copy path: keep the frame on the GPU for NVENC. Copy the transient duplication
|
||
// surface into a reused owned texture, release the duplication frame, hand off the texture.
|
||
self.ensure_gpu_copy()?;
|
||
let gpu = self.gpu_copy.clone().context("gpu copy texture")?;
|
||
self.context.CopyResource(&gpu, &tex);
|
||
let _ = self.dupl.ReleaseFrame();
|
||
self.holding_frame = false;
|
||
self.composite_cursor_gpu(&gpu, false)?;
|
||
self.last_present = Some((gpu.clone(), PixelFormat::Bgra));
|
||
return Ok(CapturedFrame {
|
||
width: self.width,
|
||
height: self.height,
|
||
pts_ns: now_ns(),
|
||
format: PixelFormat::Bgra,
|
||
payload: FramePayload::D3d11(D3d11Frame {
|
||
texture: gpu,
|
||
device: self.device.clone(),
|
||
}),
|
||
});
|
||
}
|
||
self.ensure_staging()?;
|
||
let staging = self.staging.clone().context("staging texture")?;
|
||
self.context.CopyResource(&staging, &tex);
|
||
let mut map = D3D11_MAPPED_SUBRESOURCE::default();
|
||
self.context
|
||
.Map(&staging, 0, D3D11_MAP_READ, 0, Some(&mut map))
|
||
.context("Map staging")?;
|
||
let (w, h) = (self.width as usize, self.height as usize);
|
||
let pitch = map.RowPitch as usize;
|
||
let src = std::slice::from_raw_parts(map.pData as *const u8, pitch * h);
|
||
let mut tight = depad_bgra(src, pitch, w, h);
|
||
self.context.Unmap(&staging, 0);
|
||
let _ = self.dupl.ReleaseFrame();
|
||
self.holding_frame = false;
|
||
if self.cursor_visible {
|
||
if let Some(shape) = &self.cursor_shape {
|
||
let (cx, cy) = self.cursor_pos;
|
||
if let Some(bgra) = &shape.alpha {
|
||
blend_cursor_cpu(
|
||
&mut tight,
|
||
self.width,
|
||
self.height,
|
||
bgra,
|
||
shape.w,
|
||
shape.h,
|
||
cx,
|
||
cy,
|
||
false,
|
||
);
|
||
}
|
||
if let Some(bgra) = &shape.xor {
|
||
blend_cursor_cpu(
|
||
&mut tight,
|
||
self.width,
|
||
self.height,
|
||
bgra,
|
||
shape.w,
|
||
shape.h,
|
||
cx,
|
||
cy,
|
||
true,
|
||
);
|
||
}
|
||
}
|
||
}
|
||
self.last = Some(tight.clone());
|
||
Ok(CapturedFrame {
|
||
width: self.width,
|
||
height: self.height,
|
||
pts_ns: now_ns(),
|
||
format: PixelFormat::Bgra,
|
||
payload: FramePayload::Cpu(tight),
|
||
})
|
||
}
|
||
}
|
||
|
||
fn now_ns() -> u64 {
|
||
SystemTime::now()
|
||
.duration_since(UNIX_EPOCH)
|
||
.map(|d| d.as_nanos() as u64)
|
||
.unwrap_or(0)
|
||
}
|
||
|
||
impl Capturer for DuplCapturer {
|
||
fn next_frame(&mut self) -> Result<CapturedFrame> {
|
||
// Generous: a secure-desktop switch can take several seconds to settle (re-resolve + recreate
|
||
// the duplication up to 12 s). Better a few seconds of frozen-last-frame than dropping the stream.
|
||
let mut deadline = Instant::now() + Duration::from_secs(20);
|
||
loop {
|
||
if let Some(f) = unsafe { self.acquire() }? {
|
||
self.ever_got_frame = true;
|
||
return Ok(f);
|
||
}
|
||
if self.gpu_mode {
|
||
if let Some((tex, fmt)) = &self.last_present {
|
||
// Repeat the last presented GPU frame (SDR BGRA or HDR 10-bit), keeping the encoder
|
||
// on a matching format through a static desktop or a mid-rebuild gap.
|
||
return Ok(CapturedFrame {
|
||
width: self.width,
|
||
height: self.height,
|
||
pts_ns: now_ns(),
|
||
format: *fmt,
|
||
payload: FramePayload::D3d11(D3d11Frame {
|
||
texture: tex.clone(),
|
||
device: self.device.clone(),
|
||
}),
|
||
});
|
||
}
|
||
}
|
||
if let Some(b) = &self.last {
|
||
return Ok(CapturedFrame {
|
||
width: self.width,
|
||
height: self.height,
|
||
pts_ns: now_ns(),
|
||
format: PixelFormat::Bgra,
|
||
payload: FramePayload::Cpu(b.clone()),
|
||
});
|
||
}
|
||
if Instant::now() > deadline {
|
||
// After we've streamed at least once, never fatally drop on a frame drought: a long
|
||
// secure-desktop dwell (or a slow rebuild) just means no NEW frame yet. Reset the
|
||
// deadline and keep repeating the last/seeded frame so the session stays alive. The
|
||
// deadline stays fatal only before the first frame — a genuine "monitor never lit up".
|
||
if self.ever_got_frame {
|
||
deadline = Instant::now() + Duration::from_secs(20);
|
||
continue;
|
||
}
|
||
return Err(anyhow!(
|
||
"no DXGI frame within 20s (SudoVDA monitor not activated by a WDDM GPU?)"
|
||
));
|
||
}
|
||
}
|
||
}
|
||
|
||
fn try_latest(&mut self) -> Result<Option<CapturedFrame>> {
|
||
unsafe { self.acquire() }
|
||
}
|
||
|
||
fn set_active(&self, active: bool) {
|
||
self.active.store(active, Ordering::Relaxed);
|
||
}
|
||
}
|
||
|
||
impl Drop for DuplCapturer {
|
||
fn drop(&mut self) {
|
||
if self.holding_frame {
|
||
unsafe {
|
||
let _ = self.dupl.ReleaseFrame();
|
||
}
|
||
}
|
||
// _keepalive drops after, REMOVEing the SudoVDA monitor.
|
||
}
|
||
}
|
||
|
||
#[cfg(test)]
|
||
mod tests {
|
||
use super::*;
|
||
|
||
#[test]
|
||
fn pack_luid_roundtrip() {
|
||
let l = LUID {
|
||
LowPart: 0x1234_5678,
|
||
HighPart: 0x0000_0009,
|
||
};
|
||
assert_eq!(pack_luid(l), (0x9i64 << 32) | 0x1234_5678);
|
||
}
|
||
|
||
#[test]
|
||
fn gdi_name_match() {
|
||
let mut buf = [0u16; 32];
|
||
for (i, c) in r"\\.\DISPLAY3".encode_utf16().enumerate() {
|
||
buf[i] = c;
|
||
}
|
||
assert!(gdi_name_matches(&buf, r"\\.\DISPLAY3"));
|
||
assert!(!gdi_name_matches(&buf, r"\\.\DISPLAY1"));
|
||
}
|
||
|
||
#[test]
|
||
fn depad_removes_row_padding() {
|
||
// 2x2 BGRA, pitch = 12 (row=8 + 4 pad bytes).
|
||
let pitch = 12;
|
||
let mut src = vec![0u8; pitch * 2];
|
||
for y in 0..2 {
|
||
for x in 0..8 {
|
||
src[y * pitch + x] = (y * 8 + x) as u8;
|
||
}
|
||
}
|
||
let out = depad_bgra(&src, pitch, 2, 2);
|
||
assert_eq!(out.len(), 16);
|
||
assert_eq!(&out[0..8], &[0, 1, 2, 3, 4, 5, 6, 7]);
|
||
assert_eq!(&out[8..16], &[8, 9, 10, 11, 12, 13, 14, 15]);
|
||
}
|
||
}
|