Bug 743612: Fix OMTC on gonk. r=cjones

widget/gonk/Framebuffer.cpp

@@ -39,6 +39,7 @@ static struct fb_var_screeninfo sVi;
 static size_t sActiveBuffer;
 typedef vector<nsRefPtr<gfxImageSurface> > BufferVector;
 BufferVector* sBuffers;
+static gfxIntSize *sScreenSize = nsnull;
 
 BufferVector& Buffers() { return *sBuffers; }
 
@@ -57,7 +58,7 @@ SetGraphicsMode()
 }
 
 bool
-Open(nsIntSize* aScreenSize)
+Open()
 {
     if (0 <= sFd)
         return true;
@@ -98,28 +99,32 @@ Open(nsIntSize* aScreenSize)
     // hard-coded numbers here.
     gfxASurface::gfxImageFormat format = gfxASurface::ImageFormatRGB16_565;
     int bytesPerPixel = gfxASurface::BytePerPixelFromFormat(format);
-    gfxIntSize size(sVi.xres, sVi.yres);
-    long stride = size.width * bytesPerPixel;
-    size_t numFrameBytes = stride * size.height;
+    if (!sScreenSize) {
+        sScreenSize = new gfxIntSize(sVi.xres, sVi.yres);
+    }
+    long stride = sScreenSize->width * bytesPerPixel;
+    size_t numFrameBytes = stride * sScreenSize->height;
 
     sBuffers = new BufferVector(2);
     unsigned char* data = static_cast<unsigned char*>(mem);
     for (size_t i = 0; i < 2; ++i, data += numFrameBytes) {
       memset(data, 0, numFrameBytes);
-      Buffers()[i] = new gfxImageSurface(data, size, stride, format);
+      Buffers()[i] = new gfxImageSurface(data, *sScreenSize, stride, format);
     }
 
     // Clear the framebuffer to a known state.
     Present(nsIntRect());
 
-    *aScreenSize = size;
     return true;
 }
 
 bool
 GetSize(nsIntSize *aScreenSize) {
-    if (0 <= sFd)
+    // If the framebuffer has been opened, we should always have the size.
+    if (0 <= sFd || sScreenSize) {
+        *aScreenSize = *sScreenSize;
         return true;
+    }
 
     ScopedClose fd(open("/dev/graphics/fb0", O_RDWR));
     if (0 > fd.get()) {
@@ -132,7 +137,8 @@ GetSize(nsIntSize *aScreenSize) {
         return false;
     }
 
-    *aScreenSize = gfxIntSize(sVi.xres, sVi.yres);
+    sScreenSize = new gfxIntSize(sVi.xres, sVi.yres);
+    *aScreenSize = *sScreenSize;
     return true;
 }
 
@@ -145,6 +151,8 @@ Close()
     munmap(Buffers()[0]->Data(), sMappedSize);
     delete sBuffers;
     sBuffers = NULL;
+    delete sScreenSize;
+    sScreenSize = NULL;
 
     close(sFd);
     sFd = -1;

widget/gonk/Framebuffer.h

@@ -26,16 +26,17 @@ namespace Framebuffer {
 //  Present();
 //
 
-// Return true if the fbdev was successfully opened, along with the
-// dimensions of the screen.  If this fails, the result of all further
-// calls is undefined.  Open() is idempotent.
-bool Open(nsIntSize* aScreenSize);
+// Return true if the fbdev was successfully opened.  If this fails, 
+// the result of all further calls is undefined.  Open() is idempotent.
+bool Open();
 
 // After Close(), the result of all further calls is undefined.
 // Close() is idempotent, and Open() can be called again after
 // Close().
 void Close();
 
+// Return true if the fbdev was successfully opened or the size was
+// already cached.
 bool GetSize(nsIntSize *aScreenSize);
 
 // Return the buffer to be drawn into, that will be the next frame.

widget/gonk/nsWindow.cpp

@@ -49,6 +49,7 @@ static nsWindow *gFocusedWindow = nsnull;
 static android::FramebufferNativeWindow *gNativeWindow = nsnull;
 static bool sFramebufferOpen;
 static bool sUsingOMTC;
+static bool sScreenInitialized;
 static nsRefPtr<gfxASurface> sOMTCSurface;
 static pthread_t sFramebufferWatchThread;
 
@@ -120,7 +121,7 @@ static void *frameBufferWatcher(void *) {
 
 nsWindow::nsWindow()
 {
-    if (!sGLContext && !sFramebufferOpen && !sUsingOMTC) {
+    if (!sScreenInitialized) {
         // workaround Bug 725143
         hal::SetScreenEnabled(true);
 
@@ -132,34 +133,19 @@ nsWindow::nsWindow()
 
         sUsingOMTC = UseOffMainThreadCompositing();
 
+        if (sUsingOMTC) {
+          sOMTCSurface = new gfxImageSurface(gfxIntSize(1, 1),
+                                             gfxASurface::ImageFormatRGB24);
+        }
+
         // We (apparently) don't have a way to tell if allocating the
         // fbs succeeded or failed.
         gNativeWindow = new android::FramebufferNativeWindow();
-        if (sUsingOMTC) {
-            nsIntSize screenSize;
-            bool gotFB = Framebuffer::GetSize(&screenSize);
-            MOZ_ASSERT(gotFB);
-            gScreenBounds = nsIntRect(nsIntPoint(0, 0), screenSize);
 
-            sOMTCSurface = new gfxImageSurface(gfxIntSize(1, 1),
-                gfxASurface::ImageFormatRGB24);
-        } else {
-            sGLContext = GLContextProvider::CreateForWindow(this);
-            // CreateForWindow sets up gScreenBounds
-            if (!sGLContext) {
-                LOG("Failed to create GL context for fb, trying /dev/graphics/fb0");
-
-                // We can't delete gNativeWindow.
-
-                nsIntSize screenSize;
-                sFramebufferOpen = Framebuffer::Open(&screenSize);
-                gScreenBounds = nsIntRect(nsIntPoint(0, 0), screenSize);
-                if (!sFramebufferOpen) {
-                    LOG("Failed to mmap fb(?!?), aborting ...");
-                    NS_RUNTIMEABORT("Can't open GL context and can't fall back on /dev/graphics/fb0 ...");
-                }
-            }
-        }
+        nsIntSize screenSize;
+        bool gotFB = Framebuffer::GetSize(&screenSize);
+        MOZ_ASSERT(gotFB);
+        gScreenBounds = nsIntRect(nsIntPoint(0, 0), screenSize);
 
         char propValue[PROPERTY_VALUE_MAX];
         property_get("ro.sf.hwrotation", propValue, "0");
@@ -181,6 +167,8 @@ nsWindow::nsWindow()
         }
         sVirtualBounds = gScreenBounds;
 
+        sScreenInitialized = true;
+
         nsAppShell::NotifyScreenInitialized();
     }
 }
@@ -492,6 +480,17 @@ nsWindow::GetLayerManager(PLayersChild* aShadowManager,
     if (mLayerManager)
         return mLayerManager;
 
+      // Set mUseAcceleratedRendering here to make it consistent with
+      // nsBaseWidget::GetLayerManager
+    mUseAcceleratedRendering = GetShouldAccelerate();
+    if (!mUseAcceleratedRendering) {
+        sFramebufferOpen = Framebuffer::Open();
+        if (!sFramebufferOpen) {
+            LOG("Failed to mmap fb(?!?), aborting ...");
+            NS_RUNTIMEABORT("Can't open GL context and can't fall back on /dev/graphics/fb0 ...");
+        }
+    }
+
     nsWindow *topWindow = sTopWindows[0];
 
     if (!topWindow) {
@@ -505,18 +504,22 @@ nsWindow::GetLayerManager(PLayersChild* aShadowManager,
             return mLayerManager;
     }
 
+    DebugOnly<nsIntRect> fbBounds = gScreenBounds;
+    sGLContext = GLContextProvider::CreateForWindow(this);
+    MOZ_ASSERT(fbBounds.value == gScreenBounds);
     if (sGLContext) {
         nsRefPtr<LayerManagerOGL> layerManager = new LayerManagerOGL(this);
 
-        if (layerManager->Initialize(sGLContext))
+        if (layerManager->Initialize(sGLContext)) {
             mLayerManager = layerManager;
-        else
+            return mLayerManager;
+        } else {
             LOG("Could not create OGL LayerManager");
-    } else {
-        MOZ_ASSERT(sFramebufferOpen);
-        mLayerManager = new BasicShadowLayerManager(this);
+        }
     }
 
+    mLayerManager = new BasicShadowLayerManager(this);
+
     return mLayerManager;
 }