ozone/platform/wayland: Add support for wl_output_interface

ui/ozone/platform/wayland/wayland_screen.cc

Index: ui/ozone/platform/wayland/wayland_screen.cc
diff --git a/ui/ozone/platform/wayland/wayland_screen.cc b/ui/ozone/platform/wayland/wayland_screen.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d7128a68a17aa7581fa654118028289b5b16e201
--- /dev/null
+++ b/ui/ozone/platform/wayland/wayland_screen.cc
@@ -0,0 +1,67 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ui/ozone/platform/wayland/wayland_screen.h"
+
+#include <wayland-client.h>
+
+#include "ui/display/screen.h"
+#include "ui/ozone/platform/wayland/wayland_display.h"
+
+namespace ui {
+
+WaylandScreen::WaylandScreen(wl_registry* registry,
+                             uint32_t name,
+                             wl_output* output)
+    : output_(output), name_(name), refresh_(0), rect_(0, 0, 0, 0) {
+  static const wl_output_listener output_listener = {
+      &WaylandScreen::OutputHandleGeometry, &WaylandScreen::OutputHandleMode,
+  };
+  wl_output_add_listener(output, &output_listener, this);
+}
+
+WaylandScreen::~WaylandScreen() {}
+
+void WaylandScreen::SetOutputCompleteClosure(const base::Closure& closure) {

[Michael Forney, 2016/06/14 00:55:18]

Where do you expect this to be used?

Perhaps some sort of *Delegate class might be more appropriate?

[not to use - tonikitoo, 2016/06/14 15:53:33]

+1

[joone, 2016/06/14 22:10:28]

I removed this method by hiding the use of base::Closure.

+  output_complete_closure_ = closure;
+}
+
+// static
+void WaylandScreen::OutputHandleGeometry(void* data,
+                                         wl_output* output,
+                                         int32_t x,
+                                         int32_t y,
+                                         int32_t physical_width,
+                                         int32_t physical_height,
+                                         int32_t subpixel,
+                                         const char* make,
+                                         const char* model,
+                                         int32_t output_transform) {
+  WaylandScreen* screen = static_cast<WaylandScreen*>(data);
+  screen->rect_.set_origin(gfx::Point(x, y));
+}
+
+// static
+void WaylandScreen::OutputHandleMode(void* data,
+                                     wl_output* wl_output,
+                                     uint32_t flags,
+                                     int32_t width,
+                                     int32_t height,
+                                     int32_t refresh) {
+  WaylandScreen* screen = static_cast<WaylandScreen*>(data);
+
+  if (flags & WL_OUTPUT_MODE_CURRENT) {
+    screen->rect_.set_width(width);
+    screen->rect_.set_height(height);
+    screen->refresh_ = refresh;

[not to use - tonikitoo, 2016/06/14 15:53:33]

In order to keep it simple, can we not have refresh_ as a class member at this
time, and add it if needed in the future?

Or do you have immediate need for it planed in the follow up patches?

[joone, 2016/06/14 22:10:28]

Done.

+
+    if (display::Screen::GetScreen())
+      display::Screen::GetScreen()->OnOutputGeometryChanged(screen->name_,

[not to use - tonikitoo, 2016/06/14 15:53:33]

I like this. We eliminate the need for some screen_delegate classes that
ozone/wayland has, right?

[joone, 2016/06/14 22:10:28]

Yes!

+                                                            screen->rect_);
+    if (!screen->output_complete_closure_.is_null())
+      screen->output_complete_closure_.Run();
+  }
+}
+
+}  // namespace ui