1 files changed, 114 insertions, 0 deletions
diff --git a/widget/gtk/WindowSurfaceProvider.cpp b/widget/gtk/WindowSurfaceProvider.cpp
new file mode 100644
index 0000000000..526fe6a259
--- /dev/null
+++ b/widget/gtk/WindowSurfaceProvider.cpp
@@ -0,0 +1,114 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "WindowSurfaceProvider.h"
+
+#include "gfxPlatformGtk.h"
+#include "mozilla/layers/LayersTypes.h"
+#include "WindowSurfaceX11Image.h"
+#include "WindowSurfaceX11SHM.h"
+#include "WindowSurfaceXRender.h"
+
+namespace mozilla {
+namespace widget {
+
+using namespace mozilla::gfx;
+using namespace mozilla::layers;
+
+WindowSurfaceProvider::WindowSurfaceProvider()
+    : mXDisplay(nullptr)
+    , mXWindow(0)
+    , mXVisual(nullptr)
+    , mXDepth(0)
+    , mWindowSurface(nullptr)
+{
+}
+
+void WindowSurfaceProvider::Initialize(
+      Display* aDisplay,
+      Window aWindow,
+      Visual* aVisual,
+      int aDepth)
+{
+  // We should not be initialized
+  MOZ_ASSERT(!mXDisplay);
+
+  // This should also be a valid initialization
+  MOZ_ASSERT(aDisplay && aWindow != X11None && aVisual);
+
+  mXDisplay = aDisplay;
+  mXWindow = aWindow;
+  mXVisual = aVisual;
+  mXDepth = aDepth;
+}
+void WindowSurfaceProvider::CleanupResources()
+{
+  mWindowSurface = nullptr;
+}
+
+UniquePtr<WindowSurface>
+WindowSurfaceProvider::CreateWindowSurface()
+{
+  // We should be initialized
+  MOZ_ASSERT(mXDisplay);
+
+  // Blit to the window with the following priority:
+  // 1. XRender (iff XRender is enabled && we are in-process)
+  // 2. MIT-SHM
+  // 3. XPutImage
+
+#ifdef MOZ_WIDGET_GTK
+  if (gfxVars::UseXRender()) {
+    LOGDRAW(("Drawing to nsWindow %p using XRender\n", (void*)this));
+    return MakeUnique<WindowSurfaceXRender>(mXDisplay, mXWindow, mXVisual, mXDepth);
+  }
+#endif // MOZ_WIDGET_GTK
+
+#ifdef MOZ_HAVE_SHMIMAGE
+  if (nsShmImage::UseShm()) {
+    LOGDRAW(("Drawing to nsWindow %p using MIT-SHM\n", (void*)this));
+    return MakeUnique<WindowSurfaceX11SHM>(mXDisplay, mXWindow, mXVisual, mXDepth);
+  }
+#endif // MOZ_HAVE_SHMIMAGE
+
+  LOGDRAW(("Drawing to nsWindow %p using XPutImage\n", (void*)this));
+  return MakeUnique<WindowSurfaceX11Image>(mXDisplay, mXWindow, mXVisual, mXDepth);
+}
+
+already_AddRefed<gfx::DrawTarget>
+WindowSurfaceProvider::StartRemoteDrawingInRegion(LayoutDeviceIntRegion& aInvalidRegion,
+                                                layers::BufferMode* aBufferMode)
+{
+  if (aInvalidRegion.IsEmpty())
+    return nullptr;
+
+  if (!mWindowSurface) {
+    mWindowSurface = CreateWindowSurface();
+    if (!mWindowSurface)
+      return nullptr;
+  }
+
+  *aBufferMode = BufferMode::BUFFER_NONE;
+  RefPtr<DrawTarget> dt = nullptr;
+  if (!(dt = mWindowSurface->Lock(aInvalidRegion)) &&
+      !mWindowSurface->IsFallback()) {
+    gfxWarningOnce() << "Failed to lock WindowSurface, falling back to XPutImage backend.";
+    mWindowSurface = MakeUnique<WindowSurfaceX11Image>(mXDisplay, mXWindow, mXVisual, mXDepth);
+    dt = mWindowSurface->Lock(aInvalidRegion);
+  }
+  return dt.forget();
+}
+
+void
+WindowSurfaceProvider::EndRemoteDrawingInRegion(gfx::DrawTarget* aDrawTarget,
+                                              LayoutDeviceIntRegion& aInvalidRegion)
+{
+  if (mWindowSurface)
+    mWindowSurface->Commit(aInvalidRegion);
+}
+
+} // namespace mozilla
+} // namespace widget