Add a basic NativeViewportX11 for Mojo

This CL adds a basic implementation of NativeViewport for X11. It puts a window
on screen and initializes GL for that window.

One disadvantage of this CL is that it requires use_aura to be set to 1 in
GYP_DEFINES.

R=ben@chromium.org

Review URL: https://codereview.chromium.org/48323005

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232960 0039d316-1c4b-4281-b951-d872f2087c98

3 files changed, 65 insertions, 2 deletions

diff --git a/mojo/mojo.gyp b/mojo/mojo.gyp
index afda2d0..2f40b17 100644
--- a/mojo/mojo.gyp
+++ b/mojo/mojo.gyp
@@ -176,6 +176,7 @@
       'type': 'executable',
       'dependencies': [
         '../base/base.gyp:base',
+        '../ui/gl/gl.gyp:gl',
         '../url/url.gyp:url_lib',
         'mojo_shell_lib',
         'mojo_system',
diff --git a/mojo/services/native_viewport/native_viewport_x11.cc b/mojo/services/native_viewport/native_viewport_x11.cc
index df4f5d9..e0c23ce 100644
--- a/mojo/services/native_viewport/native_viewport_x11.cc
+++ b/mojo/services/native_viewport/native_viewport_x11.cc
@@ -4,15 +4,61 @@
 
 #include "mojo/services/native_viewport/native_viewport.h"
 
+#include <X11/Xlib.h>
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/message_loop/message_loop.h"
+#include "base/message_loop/message_pump_x11.h"
+#include "gpu/command_buffer/client/gl_in_process_context.h"
+#include "gpu/command_buffer/client/gles2_implementation.h"
+#include "ui/gfx/rect.h"
+#include "ui/gfx/x/x11_types.h"
+
 namespace mojo {
 namespace services {
 
-class NativeViewportX11 : public NativeViewport {
+class NativeViewportX11 : public NativeViewport,
+                          public base::MessagePumpDispatcher {
  public:
   NativeViewportX11(NativeViewportDelegate* delegate)
-      : delegate_(delegate) {
+      : delegate_(delegate),
+        bounds_(10, 10, 500, 500) {
+    XDisplay* display = gfx::GetXDisplay();
+    XSetWindowAttributes swa;
+    memset(&swa, 0, sizeof(swa));
+    swa.override_redirect = False;
+    window_ = XCreateWindow(
+        display,
+        DefaultRootWindow(display),
+        bounds_.x(), bounds_.y(), bounds_.width(), bounds_.height(),
+        0,  // border width
+        CopyFromParent,  // depth
+        InputOutput,
+        CopyFromParent,  // visual
+        CWBackPixmap | CWOverrideRedirect, &swa);
+
+    base::MessagePumpX11::Current()->AddDispatcherForWindow(this, window_);
+    base::MessagePumpX11::Current()->AddDispatcherForRootWindow(this);
+
+    XMapWindow(display, window_);
+    XFlush(display);
+
+    gpu::GLInProcessContextAttribs attribs;
+    gl_context_.reset(gpu::GLInProcessContext::CreateContext(
+        false, window_, bounds_.size(), false,
+        attribs, gfx::PreferDiscreteGpu));
+    gl_context_->SetContextLostCallback(base::Bind(
+        &NativeViewportX11::OnGLContextLost, base::Unretained(this)));
+
+    delegate_->OnGLContextAvailable(gl_context_->GetImplementation());
   }
+
   virtual ~NativeViewportX11() {
+    base::MessagePumpX11::Current()->RemoveDispatcherForRootWindow(this);
+    base::MessagePumpX11::Current()->RemoveDispatcherForWindow(window_);
+
+    XDestroyWindow(gfx::GetXDisplay(), window_);
   }
 
  private:
@@ -22,7 +68,20 @@ class NativeViewportX11 : public NativeViewport {
     delegate_->OnDestroyed();
   }
 
+  // Overridden from base::MessagePumpDispatcher:
+  virtual bool Dispatch(const base::NativeEvent& event) OVERRIDE {
+    return true;
+  }
+
+  void OnGLContextLost() {
+    gl_context_.reset();
+    delegate_->OnGLContextLost();
+  }
+
   NativeViewportDelegate* delegate_;
+  gfx::Rect bounds_;
+  XID window_;
+  scoped_ptr<gpu::GLInProcessContext> gl_context_;
 
   DISALLOW_COPY_AND_ASSIGN(NativeViewportX11);
 };
diff --git a/mojo/shell/desktop/mojo_main.cc b/mojo/shell/desktop/mojo_main.cc
index bf1f973..991997b 100644
--- a/mojo/shell/desktop/mojo_main.cc
+++ b/mojo/shell/desktop/mojo_main.cc
@@ -7,11 +7,14 @@
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "mojo/shell/run.h"
+#include "ui/gl/gl_surface.h"
 
 int main(int argc, char** argv) {
   base::AtExitManager at_exit;
   CommandLine::Init(argc, argv);
 
+  gfx::GLSurface::InitializeOneOff();
+
   base::MessageLoop message_loop(base::MessageLoop::TYPE_UI);
   mojo::shell::Context context;