Bug 570625, part 2: Add a SurfaceDescriptorX11 datatype that abstracts what's needed to share an Xlib surface to another process. r=karl sr=shaver

gfx/layers/Makefile.in

@@ -118,6 +118,12 @@ CPPSRCS += \
         ShadowLayerParent.cpp \
         ShadowLayersParent.cpp \
         $(NULL)
+
+ifdef MOZ_X11 #{
+EXPORTS_mozilla/layers += ShadowLayerUtilsX11.h
+CPPSRCS += ShadowLayerUtilsX11.cpp
+endif #}
+
 endif #}
 
 # Enable GLES2.0 under maemo
@@ -133,7 +139,7 @@ ifdef MOZ_IPC
 include $(topsrcdir)/ipc/chromium/chromium-config.mk
 endif
 
-CXXFLAGS += $(MOZ_CAIRO_CFLAGS)
+CXXFLAGS += $(MOZ_CAIRO_CFLAGS) $(TK_CFLAGS)
 
 LayerManagerOGLShaders.h: LayerManagerOGLShaders.txt genshaders.py $(GLOBAL_DEPS)
 	$(PYTHON) $(srcdir)/opengl/genshaders.py $< $@

gfx/layers/ipc/ShadowLayerUtils.h

@@ -44,6 +44,16 @@
 #include "IPC/IPCMessageUtils.h"
 #include "Layers.h"
 
+#if defined(MOZ_X11)
+#  include "mozilla/layers/ShadowLayerUtilsX11.h"
+#else
+namespace mozilla { namespace layers {
+struct SurfaceDescriptorX11 {
+  bool operator==(const SurfaceDescriptorX11&) const { return false; }
+};
+} }
+#endif
+
 namespace IPC {
 
 template <>
@@ -66,6 +76,15 @@ struct ParamTraits<mozilla::layers::FrameMetrics>
   }
 };
 
+#if !defined(MOZ_HAVE_SURFACEDESCRIPTORX11)
+template <>
+struct ParamTraits<mozilla::layers::SurfaceDescriptorX11> {
+  typedef mozilla::layers::SurfaceDescriptorX11 paramType;
+  static void Write(Message*, const paramType&) {}
+  static bool Read(const Message*, void**, paramType*) { return false; }
+};
+#endif  // !defined(MOZ_HAVE_XSURFACEDESCRIPTOR)
+
 }
 
 #endif // IPC_ShadowLayerUtils_h

gfx/layers/ipc/ShadowLayerUtilsX11.cpp

@@ -0,0 +1,78 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at:
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Code.
+ *
+ * The Initial Developer of the Original Code is
+ *   The Mozilla Foundation
+ * Portions created by the Initial Developer are Copyright (C) 2010
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Chris Jones <jones.chris.g@gmail.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#include "mozilla/layers/ShadowLayerUtilsX11.h"
+
+#include "gfxXlibSurface.h"
+#include "mozilla/X11Util.h"
+
+namespace mozilla {
+namespace layers {
+
+// LookReturn a pointer to |aFormat| that lives in the Xrender library.
+// All code using render formats assumes it doesn't need to copy.
+static XRenderPictFormat*
+GetXRenderPictFormatFromId(Display* aDisplay, PictFormat aFormatId)
+{
+  XRenderPictFormat tmplate;
+  tmplate.id = aFormatId;
+  return XRenderFindFormat(aDisplay, PictFormatID, &tmplate, 0);
+}
+
+SurfaceDescriptorX11::SurfaceDescriptorX11(gfxXlibSurface* aSurf)
+  : mId(aSurf->XDrawable())
+  , mSize(aSurf->GetSize())
+  , mFormat(aSurf->XRenderFormat()->id)
+{ }
+
+already_AddRefed<gfxXlibSurface>
+SurfaceDescriptorX11::OpenForeign() const
+{
+  Display* display = DefaultXDisplay();
+  Screen* screen = DefaultScreenOfDisplay(display);
+
+  XRenderPictFormat* format = GetXRenderPictFormatFromId(display, mFormat);
+  nsRefPtr<gfxXlibSurface> surf =
+    new gfxXlibSurface(screen, mId, format, mSize);
+  return surf->CairoStatus() ? nsnull : surf.forget();
+}
+
+} // namespace layers
+} // namespace mozilla

gfx/layers/ipc/ShadowLayerUtilsX11.h

@@ -0,0 +1,104 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: sw=2 ts=8 et :
+ */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at:
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Code.
+ *
+ * The Initial Developer of the Original Code is
+ *   The Mozilla Foundation
+ * Portions created by the Initial Developer are Copyright (C) 2010
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Chris Jones <jones.chris.g@gmail.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef mozilla_layers_ShadowLayerUtilsX11_h
+#define mozilla_layers_ShadowLayerUtilsX11_h
+
+#include <X11/extensions/Xrender.h>
+#include <X11/Xlib.h>
+
+#include "IPC/IPCMessageUtils.h"
+
+#define MOZ_HAVE_SURFACEDESCRIPTORX11
+
+class gfxXlibSurface;
+
+namespace mozilla {
+namespace layers {
+
+struct SurfaceDescriptorX11 {
+  SurfaceDescriptorX11()
+  { }
+
+  SurfaceDescriptorX11(gfxXlibSurface* aSurf);
+
+  // Default copy ctor and operator= are OK
+
+  bool operator==(const SurfaceDescriptorX11& aOther) const {
+    // Define == as two descriptors having the same XID for now,
+    // ignoring size and render format.  If the two indeed refer to
+    // the same valid XID, then size/format are "actually" the same
+    // anyway, regardless of the values of the fields in
+    // SurfaceDescriptorX11.
+    return mId == aOther.mId;
+  }
+
+  already_AddRefed<gfxXlibSurface> OpenForeign() const;
+
+  Drawable mId;
+  gfxIntSize mSize;
+  PictFormat mFormat;
+};
+
+} // namespace layers
+} // namespace mozilla
+
+namespace IPC {
+
+template <>
+struct ParamTraits<mozilla::layers::SurfaceDescriptorX11> {
+  typedef mozilla::layers::SurfaceDescriptorX11 paramType;
+
+  static void Write(Message* aMsg, const paramType& aParam) {
+    WriteParam(aMsg, aParam.mId);
+    WriteParam(aMsg, aParam.mSize);
+    WriteParam(aMsg, aParam.mFormat);
+  }
+
+  static bool Read(const Message* aMsg, void** aIter, paramType* aResult) {
+    return (ReadParam(aMsg, aIter, &aResult->mId) &&
+            ReadParam(aMsg, aIter, &aResult->mSize) &&
+            ReadParam(aMsg, aIter, &aResult->mFormat));
+  }
+};
+
+} // namespace IPC
+
+#endif  // mozilla_layers_ShadowLayerUtilsX11_h

ipc/glue/IPCMessageUtils.h

@@ -314,6 +314,24 @@ struct ParamTraits<float>
   }
 };
 
+template<>
+struct ParamTraits<gfxIntSize>
+{
+  typedef gfxIntSize paramType;
+  
+  static void Write(Message* msg, const paramType& param)
+  {
+    WriteParam(msg, param.width);
+    WriteParam(msg, param.height);
+  }
+
+  static bool Read(const Message* msg, void** iter, paramType* result)
+  {
+    return (ReadParam(msg, iter, &result->width) &&
+            ReadParam(msg, iter, &result->height));
+  }
+};
+
 template<>
 struct ParamTraits<gfxMatrix>
 {