fuchsia_web/shell/present_frame.cc

   1 // Copyright 2023 The Chromium Authors
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "fuchsia_web/shell/present_frame.h"
   6
   7 #include <lib/sys/cpp/component_context.h>
   8 #include <lib/sys/cpp/service_directory.h>
   9 #include <stdint.h>
  10 #include <zircon/rights.h>
  11
  12 #include <memory>
  13 #include <utility>
  14 #include <vector>
  15
  16 #include "base/check.h"
  17 #include "base/fuchsia/fuchsia_logging.h"
  18 #include "base/fuchsia/process_context.h"
  19 #include "base/logging.h"
  20
  21 fuchsia::ui::views::ViewRef CloneViewRef(
  22     const fuchsia::ui::views::ViewRef& view_ref) {
  23   fuchsia::ui::views::ViewRef dup;
  24   zx_status_t status =
  25       view_ref.reference.duplicate(ZX_RIGHT_SAME_RIGHTS, &dup.reference);
  26   ZX_CHECK(status == ZX_OK, status) << "zx_object_duplicate";
  27   return dup;
  28 }
  29
  30 fuchsia::element::GraphicalPresenterPtr PresentFrame(
  31     fuchsia::web::Frame* frame,
  32     fidl::InterfaceHandle<fuchsia::element::AnnotationController>
  33         annotation_controller) {
  34   // fuchsia.element.GraphicalPresenter is the only view presentation protocol
  35   // that supports Flatland, so we expect it to be provided.
  36   //
  37   // Note also that using a sync connection results in a 3-way deadlock
  38   // between web_engine, (Flatland) scene_manager, and scenic, so we use an
  39   // async connection for the Flatland branch.
  40   fuchsia::element::GraphicalPresenterPtr presenter =
  41       base::ComponentContextForProcess()
  42           ->svc()
  43           ->Connect<fuchsia::element::GraphicalPresenter>();
  44   presenter.set_error_handler([](zx_status_t status) {
  45     ZX_LOG(ERROR, status) << "GraphicalPresenter disconnected: ";
  46   });
  47
  48   // Generate Flatland tokens and frame->CreateView2().
  49   fuchsia::ui::views::ViewCreationToken view_token;
  50   fuchsia::ui::views::ViewportCreationToken viewport_token;
  51   auto status =
  52       zx::channel::create(0, &viewport_token.value, &view_token.value);
  53   ZX_CHECK(status == ZX_OK, status);
  54   fuchsia::element::ViewSpec view_spec;
  55   view_spec.set_viewport_creation_token(std::move(viewport_token));
  56   view_spec.set_annotations({});
  57
  58   fuchsia::element::ViewControllerPtr view_controller;
  59   presenter->PresentView(
  60       std::move(view_spec), std::move(annotation_controller),
  61       view_controller.NewRequest(),
  62       [](fuchsia::element::GraphicalPresenter_PresentView_Result result) {
  63         if (result.is_err()) {
  64           LOG(ERROR) << "PresentView failed to display the view, reason: "
  65                      << static_cast<uint32_t>(result.err());
  66         }
  67       });
  68
  69   // Present a fullscreen view of |frame|.
  70   fuchsia::web::CreateView2Args create_view_args;
  71   create_view_args.set_view_creation_token(std::move(view_token));
  72   frame->CreateView2(std::move(create_view_args));
  73
  74   return presenter;
  75 }