import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

widget/gtk/WindowSurfaceXRender.cpp

@@ -0,0 +1,83 @@
+/* -*- 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 "WindowSurfaceXRender.h"
+
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/Types.h"
+#include "gfxPlatform.h"
+
+namespace mozilla {
+namespace widget {
+
+WindowSurfaceXRender::WindowSurfaceXRender(Display* aDisplay,
+                                           Window aWindow,
+                                           Visual* aVisual,
+                                           unsigned int aDepth)
+  : WindowSurfaceX11(aDisplay, aWindow, aVisual, aDepth)
+  , mXlibSurface(nullptr)
+  , mGC(X11None)
+{
+}
+
+WindowSurfaceXRender::~WindowSurfaceXRender()
+{
+  if (mGC != X11None) {
+    XFreeGC(mDisplay, mGC);
+  }
+}
+
+already_AddRefed<gfx::DrawTarget>
+WindowSurfaceXRender::Lock(const LayoutDeviceIntRegion& aRegion)
+{
+  gfx::IntRect bounds = aRegion.GetBounds().ToUnknownRect();
+  gfx::IntSize size(bounds.XMost(), bounds.YMost());
+  if (!mXlibSurface || mXlibSurface->CairoStatus() ||
+      !(size <= mXlibSurface->GetSize())) {
+    mXlibSurface = gfxXlibSurface::Create(DefaultScreenOfDisplay(mDisplay),
+                                          mVisual,
+                                          size,
+                                          mWindow);
+  }
+  if (!mXlibSurface || mXlibSurface->CairoStatus()) {
+    return nullptr;
+  }
+
+  return gfxPlatform::GetPlatform()->CreateDrawTargetForSurface(mXlibSurface, size);
+}
+
+void
+WindowSurfaceXRender::Commit(const LayoutDeviceIntRegion& aInvalidRegion)
+{
+  AutoTArray<XRectangle, 32> xrects;
+  xrects.SetCapacity(aInvalidRegion.GetNumRects());
+
+  for (auto iter = aInvalidRegion.RectIter(); !iter.Done(); iter.Next()) {
+    const LayoutDeviceIntRect &r = iter.Get();
+    XRectangle xrect = { (short)r.x, (short)r.y, (unsigned short)r.width, (unsigned short)r.height };
+    xrects.AppendElement(xrect);
+  }
+
+  if (!mGC) {
+    mGC = XCreateGC(mDisplay, mWindow, 0, nullptr);
+    if (!mGC) {
+      NS_WARNING("Couldn't create X11 graphics context for window!");
+      return;
+    }
+  }
+
+  XSetClipRectangles(mDisplay, mGC, 0, 0, xrects.Elements(), xrects.Length(), YXBanded);
+
+  MOZ_ASSERT(mXlibSurface && mXlibSurface->CairoStatus() == 0,
+             "Attempted to commit invalid surface!");
+  gfx::IntRect bounds = aInvalidRegion.GetBounds().ToUnknownRect();
+  gfx::IntSize size(bounds.XMost(), bounds.YMost());
+  XCopyArea(mDisplay, mXlibSurface->XDrawable(), mWindow, mGC, bounds.x, bounds.y,
+            size.width, size.height, bounds.x, bounds.y);
+}
+
+}  // namespace widget
+}  // namespace mozilla