Bug 1859625 Part 2: Stop sending the GetGraphicsDeviceInitData message. r=ipc-reviewers,mccr8

Differential Revision: https://phabricator.services.mozilla.com/D192999

dom/ipc/ContentParent.cpp

@@ -5914,12 +5914,6 @@ mozilla::ipc::IPCResult ContentParent::RecvShutdownPerfStats(
   return IPC_OK();
 }
 
-mozilla::ipc::IPCResult ContentParent::RecvGetGraphicsDeviceInitData(
-    ContentDeviceData* aOut) {
-  gfxPlatform::GetPlatform()->BuildContentDeviceData(aOut);
-  return IPC_OK();
-}
-
 mozilla::ipc::IPCResult ContentParent::RecvGetOutputColorProfileData(
     nsTArray<uint8_t>* aOutputColorProfileData) {
   (*aOutputColorProfileData) =

dom/ipc/ContentParent.h

@@ -1133,9 +1133,6 @@ class ContentParent final : public PContentParent,
 
   mozilla::ipc::IPCResult RecvShutdownPerfStats(const nsACString& aPerfStats);
 
-  mozilla::ipc::IPCResult RecvGetGraphicsDeviceInitData(
-      ContentDeviceData* aOut);
-
   mozilla::ipc::IPCResult RecvGetOutputColorProfileData(
       nsTArray<uint8_t>* aOutputColorProfileData);
 

dom/ipc/PContent.ipdl

@@ -1330,12 +1330,6 @@ parent:
      */
     async ShutdownPerfStats(nsCString aPerfStats);
 
-    /**
-     * Request graphics initialization information from the parent.
-     */
-    sync GetGraphicsDeviceInitData()
-        returns (ContentDeviceData aData);
-
     /**
      * Request a buffer containing the contents of the output color profile.
      * If set, this is the file pointed to by

gfx/thebes/gfxPlatform.cpp

@@ -467,10 +467,10 @@ bool gfxPlatform::Initialized() { return !!gPlatform; }
 /* static */
 void gfxPlatform::InitChild(const ContentDeviceData& aData) {
   MOZ_ASSERT(XRE_IsContentProcess());
-  MOZ_RELEASE_ASSERT(!gPlatform,
+  MOZ_ASSERT(!gPlatform,
              "InitChild() should be called before first GetPlatform()");
   // Make the provided initial ContentDeviceData available to the init
-  // routines, so they don't have to do a sync request from the parent.
+  // routines.
   gContentDeviceInitData = &aData;
   Init();
   gContentDeviceInitData = nullptr;
@@ -3869,20 +3869,16 @@ void gfxPlatform::DisableGPUProcess() {
   gfxVars::SetRemoteCanvasEnabled(false);
 }
 
-void gfxPlatform::FetchAndImportContentDeviceData() {
+void gfxPlatform::ImportCachedContentDeviceData() {
   MOZ_ASSERT(XRE_IsContentProcess());
 
-  if (gContentDeviceInitData) {
-    ImportContentDeviceData(*gContentDeviceInitData);
+  // Import the content device data if we've got some waiting.
+  if (!gContentDeviceInitData) {
     return;
   }
 
-  mozilla::dom::ContentChild* cc = mozilla::dom::ContentChild::GetSingleton();
-
-  mozilla::gfx::ContentDeviceData data;
-  cc->SendGetGraphicsDeviceInitData(&data);
-
-  ImportContentDeviceData(data);
+  ImportContentDeviceData(*gContentDeviceInitData);
+  gContentDeviceInitData = nullptr;
 }
 
 void gfxPlatform::ImportContentDeviceData(

gfx/thebes/gfxPlatform.h

@@ -862,10 +862,10 @@ class gfxPlatform : public mozilla::layers::MemoryPressureListener {
   void InitBackendPrefs(BackendPrefsData&& aPrefsData);
 
   /**
-   * Content-process only. Requests device preferences from the parent process
-   * and updates any cached settings.
+   * Content-process only. Updates device preferences from the parent process,
+   * if we've received any.
    */
-  void FetchAndImportContentDeviceData();
+  void ImportCachedContentDeviceData();
   virtual void ImportContentDeviceData(
       const mozilla::gfx::ContentDeviceData& aData);
 

gfx/thebes/gfxPlatformGtk.cpp

@@ -144,6 +144,14 @@ gfxPlatformGtk::~gfxPlatformGtk() {
   gPlatformFTLibrary = nullptr;
 }
 
+void gfxPlatformGtk::InitAcceleration() {
+  gfxPlatform::InitAcceleration();
+
+  if (XRE_IsContentProcess()) {
+    ImportCachedContentDeviceData();
+  }
+}
+
 void gfxPlatformGtk::InitX11EGLConfig() {
   FeatureState& feature = gfxConfig::GetFeature(Feature::X11_EGL);
 #ifdef MOZ_X11

gfx/thebes/gfxPlatformGtk.h

@@ -65,6 +65,7 @@ class gfxPlatformGtk final : public gfxPlatform {
   static bool CheckVariationFontSupport();
 
  protected:
+  void InitAcceleration() override;
   void InitX11EGLConfig();
   void InitDmabufConfig();
   bool InitVAAPIConfig(bool aForceEnabledByUser);

gfx/thebes/gfxWindowsPlatform.cpp

@@ -373,6 +373,9 @@ void gfxWindowsPlatform::InitAcceleration() {
 
   DeviceManagerDx::Init();
 
+  // Content processes should have received content device data from parent.
+  MOZ_ASSERT_IF(XRE_IsContentProcess(), GetInitContentDeviceData());
+
   InitializeConfig();
   InitGPUProcessSupport();
   // Ensure devices initialization. SharedSurfaceANGLE and
@@ -1198,7 +1201,7 @@ void gfxWindowsPlatform::InitializeConfig() {
     InitializeANGLEConfig();
     InitializeD2DConfig();
   } else {
-    FetchAndImportContentDeviceData();
+    ImportCachedContentDeviceData();
     InitializeANGLEConfig();
   }
 }

ipc/ipdl/sync-messages.ini

@@ -68,8 +68,6 @@ description = legacy sync IPC - please add detailed description
 description = legacy sync IPC - please add detailed description
 [PContent::EndDriverCrashGuard]
 description = legacy sync IPC - please add detailed description
-[PContent::GetGraphicsDeviceInitData]
-description = Retrieve information needed to initialize the graphics device in the content process
 [PContent::GetOutputColorProfileData]
 description = Retrieve the contents of the output color profile file
 [PContent::GetFontListShmBlock]