Bug 1180657 - Use hwc directly on GonkDisplayICS. r=sotaro

widget/gonk/HwcComposer2D.cpp

@@ -840,14 +840,7 @@ bool
 HwcComposer2D::Render(nsIWidget* aWidget)
 {
     nsScreenGonk* screen = static_cast<nsWindow*>(aWidget)->GetScreen();
-    GetGonkDisplay()->SwapBuffers(screen->GetEGLDisplay(), screen->GetEGLSurface());
-
-    if (!mHal->HasHwc()) {
-        return true;
-    }
-
-    mHal->Prepare(nullptr, screen->GetDisplayType(), nullptr, -1);
-    return !mHal->Set(nullptr, screen->GetDisplayType());
+    return GetGonkDisplay()->SwapBuffers(screen->GetEGLDisplay(), screen->GetEGLSurface());
 }
 #endif
 

widget/gonk/libdisplay/GonkDisplayICS.cpp

@@ -168,7 +168,14 @@ GonkDisplayICS::SwapBuffers(EGLDisplay dpy, EGLSurface sur)
 {
     // Should be called when composition rendering is complete for a frame.
     // Only HWC v1.0 needs this call. ICS gonk always needs the call.
-    return !mFBSurface->compositionComplete();
+    mFBSurface->compositionComplete();
+
+    if (!mHwc) {
+        return true;
+    }
+
+    mHwc->prepare(mHwc, nullptr);
+    return !mHwc->set(mHwc, dpy, sur, 0);
 }
 
 ANativeWindowBuffer*