1 files changed, 119 insertions, 0 deletions
diff --git a/widget/gtk/WindowSurfaceX11Image.cpp b/widget/gtk/WindowSurfaceX11Image.cpp
new file mode 100644
index 0000000000..5de0288043
--- /dev/null
+++ b/widget/gtk/WindowSurfaceX11Image.cpp
@@ -0,0 +1,119 @@
+/* -*- 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 "WindowSurfaceX11Image.h"
+
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/Tools.h"
+#include "mozilla/gfx/gfxVars.h"
+#include "gfxPlatform.h"
+#include "gfx2DGlue.h"
+
+namespace mozilla {
+namespace widget {
+
+WindowSurfaceX11Image::WindowSurfaceX11Image(Display* aDisplay,
+                                             Window aWindow,
+                                             Visual* aVisual,
+                                             unsigned int aDepth)
+  : WindowSurfaceX11(aDisplay, aWindow, aVisual, aDepth)
+{
+}
+
+WindowSurfaceX11Image::~WindowSurfaceX11Image()
+{
+}
+
+already_AddRefed<gfx::DrawTarget>
+WindowSurfaceX11Image::Lock(const LayoutDeviceIntRegion& aRegion)
+{
+  gfx::IntRect bounds = aRegion.GetBounds().ToUnknownRect();
+  gfx::IntSize size(bounds.XMost(), bounds.YMost());
+
+  if (!mWindowSurface || mWindowSurface->CairoStatus() ||
+      !(size <= mWindowSurface->GetSize())) {
+    mWindowSurface = new gfxXlibSurface(mDisplay, mWindow, mVisual, size);
+  }
+  if (mWindowSurface->CairoStatus()) {
+    return nullptr;
+  }
+
+  if (!mImageSurface || mImageSurface->CairoStatus() ||
+      !(size <= mImageSurface->GetSize())) {
+    gfxImageFormat format = SurfaceFormatToImageFormat(mFormat);
+    if (format == gfx::SurfaceFormat::UNKNOWN) {
+      format = mDepth == 32 ?
+                 gfx::SurfaceFormat::A8R8G8B8_UINT32 :
+                 gfx::SurfaceFormat::X8R8G8B8_UINT32;
+    }
+
+    mImageSurface = new gfxImageSurface(size, format);
+    if (mImageSurface->CairoStatus()) {
+      return nullptr;
+    }
+  }
+
+  gfxImageFormat format = mImageSurface->Format();
+  // Cairo prefers compositing to BGRX instead of BGRA where possible.
+  if (format == gfx::SurfaceFormat::X8R8G8B8_UINT32) {
+    gfx::BackendType backend = gfxVars::ContentBackend();
+    if (!gfx::Factory::DoesBackendSupportDataDrawtarget(backend)) {
+#ifdef USE_SKIA
+      backend = gfx::BackendType::SKIA;
+#else
+      backend = gfx::BackendType::CAIRO;
+#endif
+    }
+    if (backend != gfx::BackendType::CAIRO) {
+      format = gfx::SurfaceFormat::A8R8G8B8_UINT32;
+    }
+  }
+
+  return gfxPlatform::CreateDrawTargetForData(mImageSurface->Data(),
+                                              mImageSurface->GetSize(),
+                                              mImageSurface->Stride(),
+                                              ImageFormatToSurfaceFormat(format));
+}
+
+void
+WindowSurfaceX11Image::Commit(const LayoutDeviceIntRegion& aInvalidRegion)
+{
+  RefPtr<gfx::DrawTarget> dt =
+    gfx::Factory::CreateDrawTargetForCairoSurface(mWindowSurface->CairoSurface(),
+                                                  mWindowSurface->GetSize());
+  RefPtr<gfx::SourceSurface> surf =
+    gfx::Factory::CreateSourceSurfaceForCairoSurface(mImageSurface->CairoSurface(),
+                                                     mImageSurface->GetSize(),
+                                                     mImageSurface->Format());
+  if (!dt || !surf) {
+    return;
+  }
+
+  gfx::IntRect bounds = aInvalidRegion.GetBounds().ToUnknownRect();
+  gfx::Rect rect(0, 0, bounds.XMost(), bounds.YMost());
+  if (rect.IsEmpty()) {
+    return;
+  }
+
+  uint32_t numRects = aInvalidRegion.GetNumRects();
+  if (numRects != 1) {
+    AutoTArray<IntRect, 32> rects;
+    rects.SetCapacity(numRects);
+    for (auto iter = aInvalidRegion.RectIter(); !iter.Done(); iter.Next()) {
+      rects.AppendElement(iter.Get().ToUnknownRect());
+    }
+    dt->PushDeviceSpaceClipRects(rects.Elements(), rects.Length());
+  }
+
+  dt->DrawSurface(surf, rect, rect);
+
+  if (numRects != 1) {
+    dt->PopClip();
+  }
+}
+
+}  // namespace widget
+}  // namespace mozilla