Bug 1514840 - Add telemetry scalar for DXGI_COLOR_SPACE. r=jrmuizel

Differential Revision: https://phabricator.services.mozilla.com/D16204

--HG--
extra : moz-landing-system : lando

gfx/thebes/DeviceManagerDx.cpp

@@ -137,6 +137,37 @@ void DeviceManagerDx::ReleaseD3D11() {
   sD3D11CreateDeviceFn = nullptr;
 }
 
+nsTArray<DXGI_OUTPUT_DESC1> DeviceManagerDx::EnumerateOutputs() {
+  RefPtr<IDXGIAdapter> adapter = GetDXGIAdapter();
+
+  if (!adapter) {
+    NS_WARNING("Failed to acquire a DXGI adapter for enumerating outputs.");
+    return nsTArray<DXGI_OUTPUT_DESC1>();
+  }
+
+  nsTArray<DXGI_OUTPUT_DESC1> outputs;
+  for (UINT i = 0;; ++i) {
+    RefPtr<IDXGIOutput> output = nullptr;
+    if (FAILED(adapter->EnumOutputs(i, getter_AddRefs(output)))) {
+      break;
+    }
+
+    RefPtr<IDXGIOutput6> output6 = nullptr;
+    if (FAILED(output->QueryInterface(__uuidof(IDXGIOutput6),
+                                      getter_AddRefs(output6)))) {
+      break;
+    }
+
+    DXGI_OUTPUT_DESC1 desc;
+    if (FAILED(output6->GetDesc1(&desc))) {
+      break;
+    }
+
+    outputs.AppendElement(desc);
+  }
+  return outputs;
+}
+
 static inline bool ProcessOwnsCompositor() {
   return XRE_GetProcessType() == GeckoProcessType_GPU ||
          XRE_GetProcessType() == GeckoProcessType_VR ||

gfx/thebes/DeviceManagerDx.h

@@ -20,6 +20,7 @@
 #include <objbase.h>
 
 #include <dxgi.h>
+#include <dxgi1_6.h>
 
 // This header is available in the June 2010 SDK and in the Win8 SDK
 #include <d3dcommon.h>
@@ -81,6 +82,9 @@ class DeviceManagerDx final {
   // stability issues when supplying InitData to CreateTexture2D.
   bool HasCrashyInitData();
 
+  // Enumerate and return all outputs on the current adapter.
+  nsTArray<DXGI_OUTPUT_DESC1> EnumerateOutputs();
+
   bool CreateCompositorDevices();
   void CreateContentDevices();
   void CreateDirectCompositionDevice();

gfx/thebes/gfxWindowsPlatform.cpp

@@ -439,6 +439,8 @@ void gfxWindowsPlatform::InitAcceleration() {
   // CanUseHardwareVideoDecoding depends on DeviceManagerDx state,
   // so update the cached value now.
   UpdateCanUseHardwareVideoDecoding();
+
+  RecordStartupTelemetry();
 }
 
 void gfxWindowsPlatform::InitWebRenderConfig() {
@@ -1472,6 +1474,21 @@ void gfxWindowsPlatform::InitializeD3D11Config() {
                         uint32_t(aDevice));
 }
 
+void gfxWindowsPlatform::RecordStartupTelemetry() {
+  DeviceManagerDx* dx = DeviceManagerDx::Get();
+  nsTArray<DXGI_OUTPUT_DESC1> outputs = dx->EnumerateOutputs();
+
+  uint32_t allSupportedColorSpaces = 0;
+  for (auto& output : outputs) {
+    uint32_t colorSpace = 1 << output.ColorSpace;
+    allSupportedColorSpaces |= colorSpace;
+  }
+
+  Telemetry::ScalarSet(
+      Telemetry::ScalarID::GFX_HDR_WINDOWS_DISPLAY_COLORSPACE_BITFIELD,
+      allSupportedColorSpaces);
+}
+
 // Supports lazy device initialization on Windows, so that WebRender can avoid
 // initializing GPU state and allocating swap chains for most non-GPU processes.
 void gfxWindowsPlatform::EnsureDevicesInitialized() {

gfx/thebes/gfxWindowsPlatform.h

@@ -258,6 +258,8 @@ class gfxWindowsPlatform : public gfxPlatform {
   void InitializeDirectDrawConfig();
   void InitializeAdvancedLayersConfig();
 
+  void RecordStartupTelemetry();
+
   RefPtr<IDWriteRenderingParams> mRenderingParams[TEXT_RENDERING_COUNT];
   DWRITE_MEASURING_MODE mMeasuringMode;
 

toolkit/components/telemetry/Scalars.yaml

@@ -1904,6 +1904,24 @@ gfx.omtp:
     record_in_processes:
       - 'content'
 
+gfx.hdr:
+  windows_display_colorspace_bitfield:
+    bug_numbers:
+      - 1514840
+    description: >
+      A bitfield representation of the available DXGI color spaces of the connected displays on Windows.
+      See (https://docs.microsoft.com/en-us/windows/desktop/api/dxgicommon/ne-dxgicommon-dxgi_color_space_type)
+      for definitions of color spaces. Each N'th bit of this scalar indicates whether the DXGI color space with
+      index 'N' is available on at least one connected monitor.
+    keyed: false
+    kind: uint
+    expires: "70"
+    notification_emails:
+      - gfx-telemetry-alerts@mozilla.com
+      - rhunt@mozilla.com
+    record_in_processes:
+      - 'main'
+
 # The following section contains the form autofill related scalars.
 formautofill:
   availability: