Add tiling and paint worker count information to about:support. (bug 1432516, r=milan)

--HG--
extra : rebase_source : f2ce10a284f53b21ce5eb94f039808ec92f40685
extra : histedit_source : d3bbb62e946fe32f601cc7753513d2d30f2aa294

gfx/layers/PaintThread.cpp

@@ -122,6 +122,10 @@ PaintThread::AddRef()
 /* static */ int32_t
 PaintThread::CalculatePaintWorkerCount()
 {
+  if (!gfxPlatform::GetPlatform()->UsesTiling()) {
+    return 0;
+  }
+
   int32_t cpuCores = 1;
   nsCOMPtr<nsIPropertyBag2> systemInfo = do_GetService(NS_SYSTEMINFO_CONTRACTID);
   if (systemInfo) {

gfx/layers/PaintThread.h

@@ -300,11 +300,11 @@ public:
   void Release();
   void AddRef();
 
+  static int32_t CalculatePaintWorkerCount();
+
 private:
   PaintThread();
 
-  static int32_t CalculatePaintWorkerCount();
-
   bool Init();
   void ShutdownOnPaintThread();
   void InitOnPaintThread();

toolkit/content/aboutSupport.js

@@ -469,7 +469,9 @@ var snapshotFormatters = {
     addRowFromKey("features", "webgl2Extensions");
     addRowFromKey("features", "supportsHardwareH264", "hardwareH264");
     addRowFromKey("features", "direct2DEnabled", "#Direct2D");
+    addRowFromKey("features", "usesTiling");
     addRowFromKey("features", "offMainThreadPaintEnabled");
+    addRowFromKey("features", "offMainThreadPaintWorkerCount");
 
     if ("directWriteEnabled" in data) {
       let message = data.directWriteEnabled;

toolkit/locales/en-US/chrome/global/aboutSupport.properties

@@ -100,7 +100,9 @@ glcontextCrashGuard = OpenGL
 resetOnNextRestart = Reset on Next Restart
 gpuProcessKillButton = Terminate GPU Process
 gpuDeviceResetButton = Trigger Device Reset
+usesTiling = Uses Tiling
 offMainThreadPaintEnabled = Off Main Thread Painting Enabled
+offMainThreadPaintWorkerCount = Off Main Thread Painting Worker Count
 
 audioBackend = Audio Backend
 maxAudioChannels = Max Channels

toolkit/modules/Troubleshoot.jsm

@@ -472,7 +472,9 @@ var dataProviders = {
       DWriteEnabled: "directWriteEnabled",
       DWriteVersion: "directWriteVersion",
       cleartypeParameters: "clearTypeParameters",
+      UsesTiling: "usesTiling",
       OffMainThreadPaintEnabled: "offMainThreadPaintEnabled",
+      OffMainThreadPaintWorkerCount: "offMainThreadPaintWorkerCount",
     };
 
     for (let prop in gfxInfoProps) {

widget/GfxInfoBase.cpp

@@ -32,6 +32,7 @@
 #include "mozilla/gfx/GPUProcessManager.h"
 #include "mozilla/gfx/Logging.h"
 #include "mozilla/gfx/gfxVars.h"
+#include "mozilla/layers/PaintThread.h"
 #include "MediaPrefs.h"
 #include "gfxPrefs.h"
 #include "gfxPlatform.h"
@@ -1488,6 +1489,13 @@ GfxInfoBase::GetWebRenderEnabled(bool* aWebRenderEnabled)
   return NS_OK;
 }
 
+NS_IMETHODIMP
+GfxInfoBase::GetUsesTiling(bool* aUsesTiling)
+{
+  *aUsesTiling = gfxPlatform::GetPlatform()->UsesTiling();
+  return NS_OK;
+}
+
 NS_IMETHODIMP
 GfxInfoBase::GetOffMainThreadPaintEnabled(bool* aOffMainThreadPaintEnabled)
 {
@@ -1495,6 +1503,17 @@ GfxInfoBase::GetOffMainThreadPaintEnabled(bool* aOffMainThreadPaintEnabled)
   return NS_OK;
 }
 
+NS_IMETHODIMP
+GfxInfoBase::GetOffMainThreadPaintWorkerCount(int32_t* aOffMainThreadPaintWorkerCount)
+{
+  if (gfxConfig::IsEnabled(Feature::OMTP)) {
+    *aOffMainThreadPaintWorkerCount = layers::PaintThread::CalculatePaintWorkerCount();
+  } else {
+    *aOffMainThreadPaintWorkerCount = 0;
+  }
+  return NS_OK;
+}
+
 NS_IMETHODIMP
 GfxInfoBase::GetIsHeadless(bool* aIsHeadless)
 {

widget/GfxInfoBase.h

@@ -63,7 +63,9 @@ public:
   NS_IMETHOD GetUsingGPUProcess(bool *aOutValue) override;
   NS_IMETHOD GetWebRenderEnabled(bool* aWebRenderEnabled) override;
   NS_IMETHOD GetIsHeadless(bool* aIsHeadless) override;
+  NS_IMETHOD GetUsesTiling(bool* aUsesTiling) override;
   NS_IMETHOD GetOffMainThreadPaintEnabled(bool* aOffMainThreadPaintEnabled) override;
+  NS_IMETHOD GetOffMainThreadPaintWorkerCount(int32_t* aOffMainThreadPaintWorkerCount) override;
 
   // Initialization function. If you override this, you must call this class's
   // version of Init first.

widget/nsIGfxInfo.idl

@@ -25,7 +25,9 @@ interface nsIGfxInfo : nsISupports
   readonly attribute DOMString ContentBackend;
   readonly attribute boolean WebRenderEnabled;
   readonly attribute boolean isHeadless;
+  readonly attribute boolean UsesTiling;
   readonly attribute boolean OffMainThreadPaintEnabled;
+  readonly attribute long OffMainThreadPaintWorkerCount;
 
   // XXX: Switch to a list of devices, rather than explicitly numbering them.