Index: gpu/ipc/service/gpu_vsync_provider_win.cc |
diff --git a/gpu/ipc/service/gpu_vsync_provider_win.cc b/gpu/ipc/service/gpu_vsync_provider_win.cc |
new file mode 100644 |
index 0000000000000000000000000000000000000000..973ae9cf1f29614887e4b9578f9007752879a155 |
--- /dev/null |
+++ b/gpu/ipc/service/gpu_vsync_provider_win.cc |
@@ -0,0 +1,180 @@ |
+// Copyright (c) 2016 The Chromium Authors. All rights reserved. |
+// Use of this source code is governed by a BSD-style license that can be |
+// found in the LICENSE file. |
+ |
+#include "gpu/ipc/service/gpu_vsync_provider.h" |
+ |
+#include "base/bind.h" |
+#include "base/strings/stringprintf.h" |
+#include "base/trace_event/trace_event.h" |
+ |
+#include <windows.h> |
+ |
+namespace gpu { |
+ |
+namespace { |
+// from <D3dkmthk.h> |
+typedef LONG NTSTATUS; |
+typedef UINT D3DKMT_HANDLE; |
+typedef UINT D3DDDI_VIDEO_PRESENT_SOURCE_ID; |
+ |
+#define STATUS_SUCCESS ((NTSTATUS)0x00000000L) |
+ |
+typedef struct _D3DKMT_OPENADAPTERFROMHDC { |
+ HDC hDc; |
+ D3DKMT_HANDLE hAdapter; |
+ LUID AdapterLuid; |
+ D3DDDI_VIDEO_PRESENT_SOURCE_ID VidPnSourceId; |
+} D3DKMT_OPENADAPTERFROMHDC; |
+ |
+typedef struct _D3DKMT_CLOSEADAPTER { |
+ D3DKMT_HANDLE hAdapter; |
+} D3DKMT_CLOSEADAPTER; |
+ |
+typedef struct _D3DKMT_WAITFORVERTICALBLANKEVENT { |
+ D3DKMT_HANDLE hAdapter; |
+ D3DKMT_HANDLE hDevice; |
+ D3DDDI_VIDEO_PRESENT_SOURCE_ID VidPnSourceId; |
+} D3DKMT_WAITFORVERTICALBLANKEVENT; |
+ |
+typedef NTSTATUS(APIENTRY* PFND3DKMTOPENADAPTERFROMHDC)( |
+ D3DKMT_OPENADAPTERFROMHDC*); |
+typedef NTSTATUS(APIENTRY* PFND3DKMTCLOSEADAPTER)(D3DKMT_CLOSEADAPTER*); |
+typedef NTSTATUS(APIENTRY* PFND3DKMTWAITFORVERTICALBLANKEVENT)( |
+ D3DKMT_WAITFORVERTICALBLANKEVENT*); |
+} // namespace |
+ |
+/* static */ |
+std::unique_ptr<GpuVSyncProvider> GpuVSyncProvider::Create( |
+ const VSyncCallback& callback, |
+ SurfaceHandle surface_handle) { |
+ std::unique_ptr<GpuVSyncProvider> provider( |
+ new GpuVSyncProvider(callback, surface_handle)); |
+ // Start the thread. |
+ base::Thread::Options options; |
+ // TODO(stanisc): might consider even higher priority - REALTIME_AUDIO. |
+ options.priority = base::ThreadPriority::DISPLAY; |
+ provider->StartWithOptions(options); |
+ return provider; |
+} |
+ |
+GpuVSyncProvider::GpuVSyncProvider(const VSyncCallback& callback, |
+ SurfaceHandle surface_handle) |
+ : base::Thread(base::StringPrintf("VSync-%d", surface_handle)), |
+ callback_(callback), |
+ surface_handle_(surface_handle) {} |
+ |
+GpuVSyncProvider::~GpuVSyncProvider() { |
+ Stop(); |
+} |
+ |
+void GpuVSyncProvider::EnableVSync(bool enabled) { |
+ if (enabled_ == enabled) |
+ return; |
+ |
+ enabled_ = enabled; |
+ |
+ if (enabled_) |
+ task_runner()->PostTask( |
+ FROM_HERE, base::Bind(&GpuVSyncProvider::StartRunningVSyncOnThread, |
+ base::Unretained(this))); |
+} |
+ |
+void GpuVSyncProvider::StartRunningVSyncOnThread() { |
+ DCHECK(base::PlatformThread::CurrentId() == GetThreadId()); |
+ |
+ if (!running_) { |
+ running_ = true; |
+ WaitForVSyncOnThread(); |
+ } |
+} |
+ |
+void GpuVSyncProvider::WaitForVSyncOnThread() { |
brucedawson
2016/12/22 21:49:16
Do we really want this to do the whole init/de-ini
stanisc
2016/12/22 22:59:31
One reason I've done it this way is because I want
stanisc
2017/01/04 22:33:04
OK. Cached function pointers, but keep opening/clo
|
+ DCHECK(base::PlatformThread::CurrentId() == GetThreadId()); |
+ |
+ TRACE_EVENT0("gpu", "GpuVSyncProvider::WaitForVSyncOnThread"); |
+ |
+ // TODO: implement this |
brucedawson
2016/12/22 21:49:16
I don't understand this comment.
stanisc
2016/12/22 22:59:31
Forgot to remove this one. Will remove it in the n
stanisc
2017/01/04 22:33:04
Done.
|
+ HMODULE gdi32 = GetModuleHandle(L"gdi32"); |
+ if (!gdi32) { |
+ NOTREACHED() << "Can't open gdi32.dll"; |
+ return; |
+ } |
+ |
+ auto open_adapter_from_hdc_ptr = |
+ reinterpret_cast<PFND3DKMTOPENADAPTERFROMHDC>( |
+ ::GetProcAddress(gdi32, "D3DKMTOpenAdapterFromHdc")); |
+ if (!open_adapter_from_hdc_ptr) { |
+ NOTREACHED() << "Can't find D3DKMTOpenAdapterFromHdc in gdi32.dll"; |
+ return; |
+ } |
+ |
+ auto close_adapter_ptr = reinterpret_cast<PFND3DKMTCLOSEADAPTER>( |
+ ::GetProcAddress(gdi32, "D3DKMTCloseAdapter")); |
+ if (!close_adapter_ptr) { |
+ NOTREACHED() << "Can't find D3DKMTCloseAdapter in gdi32.dll"; |
+ return; |
+ } |
+ |
+ auto wait_for_vertical_blank_event_ptr = |
+ reinterpret_cast<PFND3DKMTWAITFORVERTICALBLANKEVENT>( |
+ ::GetProcAddress(gdi32, "D3DKMTWaitForVerticalBlankEvent")); |
+ if (!wait_for_vertical_blank_event_ptr) { |
+ NOTREACHED() << "Can't find D3DKMTWaitForVerticalBlankEvent in gdi32.dll"; |
+ return; |
+ } |
+ |
+ HMONITOR monitor = |
+ MonitorFromWindow(surface_handle_, MONITOR_DEFAULTTONEAREST); |
+ MONITORINFOEX monitor_info; |
+ monitor_info.cbSize = sizeof(MONITORINFOEX); |
+ BOOL success = GetMonitorInfo(monitor, &monitor_info); |
+ CHECK(success); |
+ |
+ HDC hdc = CreateDC(NULL, monitor_info.szDevice, NULL, NULL); |
+ |
+ D3DKMT_OPENADAPTERFROMHDC open_adapter_data; |
+ open_adapter_data.hDc = hdc; |
+ |
+ NTSTATUS result = open_adapter_from_hdc_ptr(&open_adapter_data); |
+ DeleteDC(hdc); |
+ |
+ CHECK(result == STATUS_SUCCESS); |
+ |
+ D3DKMT_WAITFORVERTICALBLANKEVENT wait_for_vertical_blank_event_data; |
+ wait_for_vertical_blank_event_data.hAdapter = open_adapter_data.hAdapter; |
+ wait_for_vertical_blank_event_data.hDevice = 0; |
+ wait_for_vertical_blank_event_data.VidPnSourceId = |
+ open_adapter_data.VidPnSourceId; |
+ |
+ result = |
+ wait_for_vertical_blank_event_ptr(&wait_for_vertical_blank_event_data); |
+ if (result == STATUS_SUCCESS) { |
+ // Note: this sends update from the background thread. |
+ SendVSyncUpdate(base::TimeTicks::Now()); |
+ } |
+ |
+ D3DKMT_CLOSEADAPTER close_adapter_data; |
+ close_adapter_data.hAdapter = open_adapter_data.hAdapter; |
+ |
+ result = close_adapter_ptr(&close_adapter_data); |
+ CHECK(result == STATUS_SUCCESS); |
+ |
+ // Restart the task if still enabled. |
+ if (enabled_) { |
+ task_runner()->PostTask(FROM_HERE, |
+ base::Bind(&GpuVSyncProvider::WaitForVSyncOnThread, |
+ base::Unretained(this))); |
+ } else { |
+ running_ = false; |
+ } |
+} |
+ |
+void GpuVSyncProvider::SendVSyncUpdate(base::TimeTicks now) { |
+ TRACE_EVENT0("gpu", "GpuVSyncProvider::SendVSync"); |
stanisc
2016/12/22 21:35:08
Need to change this to SendVSyncUpdate
|
+ if (enabled_) { |
+ callback_.Run(now); |
+ } |
+} |
+ |
+} // namespace gpu |