Bug 947045 - Use Xlib surfaces in basic compositor (r=mattwoodrow)

gfx/layers/basic/TextureClientX11.cpp

@@ -0,0 +1,147 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+//  * 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 "mozilla/layers/TextureClientX11.h"
+#include "mozilla/layers/CompositableClient.h"
+#include "mozilla/layers/CompositableForwarder.h"
+#include "mozilla/layers/ISurfaceAllocator.h"
+#include "mozilla/layers/ShadowLayerUtilsX11.h"
+#include "mozilla/gfx/2D.h"
+#include "gfxXlibSurface.h"
+#include "gfx2DGlue.h"
+
+#include "mozilla/X11Util.h"
+#include <X11/Xlib.h>
+
+using namespace mozilla;
+using namespace mozilla::gfx;
+using namespace mozilla::layers;
+
+TextureClientX11::TextureClientX11(SurfaceFormat aFormat, TextureFlags aFlags)
+  : mFormat(aFormat),
+    mTextureFlags(aFlags)
+{
+  MOZ_COUNT_CTOR(TextureClientX11);
+}
+
+TextureClientX11::~TextureClientX11()
+{
+  MOZ_COUNT_DTOR(TextureClientX11);
+}
+
+bool
+TextureClientX11::IsAllocated() const
+{
+  return !!mSurface;
+}
+
+bool
+TextureClientX11::Lock(OpenMode aMode)
+{
+  // XXX - Turn this into a fatal assertion as soon as Bug 952507 is fixed
+  NS_WARN_IF_FALSE(!mLocked, "The TextureClient is already Locked!");
+  mLocked = true;
+  return IsValid() && IsAllocated();
+}
+
+void
+TextureClientX11::Unlock()
+{
+  // XXX - Turn this into a fatal assertion as soon as Bug 952507 is fixed
+  NS_WARN_IF_FALSE(mLocked, "The TextureClient is already Unlocked!");
+  mLocked = false;
+
+  FinishX(DefaultXDisplay());
+}
+
+bool
+TextureClientX11::ToSurfaceDescriptor(SurfaceDescriptor& aOutDescriptor)
+{
+  MOZ_ASSERT(IsValid());
+  if (!mSurface) {
+    return false;
+  }
+
+  aOutDescriptor = SurfaceDescriptorX11(mSurface);
+  return true;
+}
+
+TextureClientData*
+TextureClientX11::DropTextureData()
+{
+  MOZ_ASSERT(!(mFlags & TEXTURE_DEALLOCATE_CLIENT));
+  return nullptr;
+}
+
+bool
+TextureClientX11::UpdateSurface(gfxASurface* aSurface)
+{
+  MOZ_ASSERT(IsValid());
+
+  if (gfxPlatform::GetPlatform()->SupportsAzureContent()) {
+    RefPtr<DrawTarget> dt = GetAsDrawTarget();
+    if (!dt) {
+      return false;
+    }
+
+    RefPtr<SourceSurface> source = gfxPlatform::GetPlatform()->GetSourceSurfaceForSurface(dt, aSurface);
+    dt->CopySurface(source, IntRect(IntPoint(), GetSize()), IntPoint());
+  } else {
+    if (!mSurface) {
+      return false;
+    }
+
+    nsRefPtr<gfxContext> ctx = new gfxContext(mSurface.get());
+    ctx->SetOperator(gfxContext::OPERATOR_SOURCE);
+    ctx->DrawSurface(aSurface, mSurface->GetSize());
+  }
+
+  return true;
+}
+
+already_AddRefed<gfxASurface>
+TextureClientX11::GetAsSurface()
+{
+  MOZ_ASSERT(IsValid());
+  if (!mSurface) {
+    return nullptr;
+  }
+
+  nsRefPtr<gfxASurface> temp = mSurface.get();
+  return temp.forget();
+}
+
+bool
+TextureClientX11::AllocateForSurface(IntSize aSize, TextureAllocationFlags aTextureFlags)
+{
+  MOZ_ASSERT(IsValid());
+  //MOZ_ASSERT(mFormat != gfx::FORMAT_YUV, "This TextureClient cannot use YCbCr data");
+
+  gfxContentType contentType = ContentForFormat(mFormat);
+  gfxIntSize size = ThebesIntSize(aSize);
+  nsRefPtr<gfxASurface> surface = gfxPlatform::GetPlatform()->CreateOffscreenSurface(size, contentType);
+  if (!surface || surface->GetType() != gfxSurfaceType::Xlib) {
+    NS_ERROR("creating Xlib surface failed!");
+    return false;
+  }
+
+  mSize = aSize;
+  mSurface = static_cast<gfxXlibSurface*>(surface.get());
+
+  // The host is always responsible for freeing the pixmap.
+  mSurface->ReleasePixmap();
+  return true;
+}
+
+TemporaryRef<DrawTarget>
+TextureClientX11::GetAsDrawTarget()
+{
+  MOZ_ASSERT(IsValid());
+  if (!mSurface) {
+    return nullptr;
+  }
+
+  IntSize size = ToIntSize(mSurface->GetSize());
+  return Factory::CreateDrawTargetForCairoSurface(mSurface->CairoSurface(), size);
+}