ui/ozone/platform/egltest/ozone_platform_egltest.cc

// Copyright 2014 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/egltest/ozone_platform_egltest.h"

#include "base/bind.h"
#include "base/command_line.h"
#include "base/environment.h"
#include "base/files/file_path.h"
#include "base/path_service.h"
#include "base/threading/thread_checker.h"
#include "library_loaders/libeglplatform_shim.h"
#include "third_party/khronos/EGL/egl.h"
#include "ui/events/devices/device_data_manager.h"
#include "ui/events/event.h"
#include "ui/events/ozone/device/device_manager.h"
#include "ui/events/ozone/evdev/event_factory_evdev.h"
#include "ui/events/ozone/events_ozone.h"
#include "ui/events/ozone/layout/keyboard_layout_engine_manager.h"
#include "ui/events/ozone/layout/stub/stub_keyboard_layout_engine.h"
#include "ui/events/platform/platform_event_dispatcher.h"
#include "ui/gfx/vsync_provider.h"
#include "ui/ozone/common/egl_util.h"
#include "ui/ozone/common/native_display_delegate_ozone.h"
#include "ui/ozone/common/stub_overlay_manager.h"
#include "ui/ozone/public/cursor_factory_ozone.h"
#include "ui/ozone/public/gpu_platform_support.h"
#include "ui/ozone/public/gpu_platform_support_host.h"
#include "ui/ozone/public/ozone_platform.h"
#include "ui/ozone/public/ozone_switches.h"
#include "ui/ozone/public/surface_factory_ozone.h"
#include "ui/ozone/public/surface_ozone_egl.h"
#include "ui/ozone/public/system_input_injector.h"
#include "ui/platform_window/platform_window.h"
#include "ui/platform_window/platform_window_delegate.h"

namespace ui {

namespace {

const char kEglplatformShim[] = "EGLPLATFORM_SHIM";
const char kEglplatformShimDefault[] = "libeglplatform_shim.so.1";
const char kDefaultEglSoname[] = "libEGL.so.1";
const char kDefaultGlesSoname[] = "libGLESv2.so.2";

// Get the library soname to load.
std::string GetShimLibraryName() {
  std::string library;
  scoped_ptr<base::Environment> env(base::Environment::Create());
  if (env->GetVar(kEglplatformShim, &library))
    return library;
  return kEglplatformShimDefault;
}

// Touch events are reported in device coordinates. This scales the event to the
// window's coordinate space.
void ScaleTouchEvent(TouchEvent* event, const gfx::SizeF& size) {
  for (const auto& device :
       DeviceDataManager::GetInstance()->touchscreen_devices()) {
    if (device.id == event->source_device_id()) {
      gfx::SizeF touchscreen_size = device.size;
      gfx::PointF location = event->location_f();

      location.Scale(size.width() / touchscreen_size.width(),
                     size.height() / touchscreen_size.height());
      double ratio = std::sqrt(size.GetArea() / touchscreen_size.GetArea());

      event->set_location(location);
      event->set_radius_x(event->radius_x() * ratio);
      event->set_radius_y(event->radius_y() * ratio);
      return;
    }
  }
}

class EgltestWindow : public PlatformWindow, public PlatformEventDispatcher {
 public:
  EgltestWindow(PlatformWindowDelegate* delegate,
                LibeglplatformShimLoader* eglplatform_shim,
                EventFactoryEvdev* event_factory,
                const gfx::Rect& bounds);
  ~EgltestWindow() override;

  // PlatformWindow:
  gfx::Rect GetBounds() override;
  void SetBounds(const gfx::Rect& bounds) override;
  void Show() override;
  void Hide() override;
  void Close() override;
  void SetCapture() override;
  void ReleaseCapture() override;
  void ToggleFullscreen() override;
  void Maximize() override;
  void Minimize() override;
  void Restore() override;
  void SetCursor(PlatformCursor cursor) override;
  void MoveCursorTo(const gfx::Point& location) override;
  void ConfineCursorToBounds(const gfx::Rect& bounds) override;

  // PlatformEventDispatcher:
  bool CanDispatchEvent(const PlatformEvent& event) override;
  uint32_t DispatchEvent(const PlatformEvent& event) override;

 private:
  PlatformWindowDelegate* delegate_;
  LibeglplatformShimLoader* eglplatform_shim_;
  EventFactoryEvdev* event_factory_;
  gfx::Rect bounds_;
  ShimNativeWindowId window_id_;

  DISALLOW_COPY_AND_ASSIGN(EgltestWindow);
};

EgltestWindow::EgltestWindow(PlatformWindowDelegate* delegate,
                             LibeglplatformShimLoader* eglplatform_shim,
                             EventFactoryEvdev* event_factory,
                             const gfx::Rect& bounds)
    : delegate_(delegate),
      eglplatform_shim_(eglplatform_shim),
      event_factory_(event_factory),
      bounds_(bounds),
      window_id_(SHIM_NO_WINDOW_ID) {
  window_id_ = eglplatform_shim_->ShimCreateWindow();
  delegate_->OnAcceleratedWidgetAvailable(window_id_);
  ui::PlatformEventSource::GetInstance()->AddPlatformEventDispatcher(this);
}

EgltestWindow::~EgltestWindow() {
  ui::PlatformEventSource::GetInstance()->RemovePlatformEventDispatcher(this);
  if (window_id_ != SHIM_NO_WINDOW_ID)
    eglplatform_shim_->ShimDestroyWindow(window_id_);
}

gfx::Rect EgltestWindow::GetBounds() {
  return bounds_;
}

void EgltestWindow::SetBounds(const gfx::Rect& bounds) {
  bounds_ = bounds;
  delegate_->OnBoundsChanged(bounds);
}

void EgltestWindow::Show() {
}

void EgltestWindow::Hide() {
}

void EgltestWindow::Close() {
}

void EgltestWindow::SetCapture() {
}

void EgltestWindow::ReleaseCapture() {
}

void EgltestWindow::ToggleFullscreen() {
}

void EgltestWindow::Maximize() {
}

void EgltestWindow::Minimize() {
}

void EgltestWindow::Restore() {
}

void EgltestWindow::SetCursor(PlatformCursor cursor) {
}

void EgltestWindow::MoveCursorTo(const gfx::Point& location) {
  event_factory_->WarpCursorTo(window_id_, location);
}

void EgltestWindow::ConfineCursorToBounds(const gfx::Rect& bounds) {
}

bool EgltestWindow::CanDispatchEvent(const ui::PlatformEvent& ne) {
  return true;
}

uint32_t EgltestWindow::DispatchEvent(const ui::PlatformEvent& native_event) {
  DCHECK(native_event);
  Event* event = static_cast<Event*>(native_event);
  if (event->IsTouchEvent())
    ScaleTouchEvent(static_cast<TouchEvent*>(event), bounds_.size());

  DispatchEventFromNativeUiEvent(
      native_event, base::Bind(&PlatformWindowDelegate::DispatchEvent,
                               base::Unretained(delegate_)));

  return ui::POST_DISPATCH_STOP_PROPAGATION;
}

// EGL surface wrapper for libeglplatform_shim.
//
// This just manages the native window lifetime using
// ShimGetNativeWindow & ShimReleaseNativeWindow.
class SurfaceOzoneEgltest : public SurfaceOzoneEGL {
 public:
  SurfaceOzoneEgltest(ShimNativeWindowId window_id,
                      LibeglplatformShimLoader* eglplatform_shim)
      : eglplatform_shim_(eglplatform_shim) {
    native_window_ = eglplatform_shim_->ShimGetNativeWindow(window_id);
  }
  ~SurfaceOzoneEgltest() override {
    bool ret = eglplatform_shim_->ShimReleaseNativeWindow(native_window_);
    DCHECK(ret);
  }

  intptr_t GetNativeWindow() override { return native_window_; }

  bool OnSwapBuffers() override { return true; }

  bool OnSwapBuffersAsync(const SwapCompletionCallback& callback) override {
    callback.Run(gfx::SwapResult::SWAP_ACK);
    return true;
  }

  bool ResizeNativeWindow(const gfx::Size& viewport_size) override {
    return true;
  }

  scoped_ptr<gfx::VSyncProvider> CreateVSyncProvider() override {
    return nullptr;
  }

 private:
  LibeglplatformShimLoader* eglplatform_shim_;
  intptr_t native_window_;
};

// EGL surface factory for libeglplatform_shim.
//
// This finds the right EGL/GLES2 libraries for loading, and creates
// a single native window via ShimCreateWindow for drawing
// into.
class SurfaceFactoryEgltest : public ui::SurfaceFactoryOzone {
 public:
  SurfaceFactoryEgltest(LibeglplatformShimLoader* eglplatform_shim)
      : eglplatform_shim_(eglplatform_shim) {}
  ~SurfaceFactoryEgltest() override {
    DCHECK(thread_checker_.CalledOnValidThread());
  }

  // SurfaceFactoryOzone:
  intptr_t GetNativeDisplay() override;
  scoped_ptr<SurfaceOzoneEGL> CreateEGLSurfaceForWidget(
      gfx::AcceleratedWidget widget) override;
  const int32* GetEGLSurfaceProperties(const int32* desired_list) override;
  bool LoadEGLGLES2Bindings(
      AddGLLibraryCallback add_gl_library,
      SetGLGetProcAddressProcCallback set_gl_get_proc_address) override;

 private:
  LibeglplatformShimLoader* eglplatform_shim_;
  base::ThreadChecker thread_checker_;
};

intptr_t SurfaceFactoryEgltest::GetNativeDisplay() {
  DCHECK(thread_checker_.CalledOnValidThread());
  return eglplatform_shim_->ShimGetNativeDisplay();
}

scoped_ptr<SurfaceOzoneEGL> SurfaceFactoryEgltest::CreateEGLSurfaceForWidget(
    gfx::AcceleratedWidget widget) {
  DCHECK(thread_checker_.CalledOnValidThread());
  return make_scoped_ptr<SurfaceOzoneEGL>(
      new SurfaceOzoneEgltest(widget, eglplatform_shim_));
}

bool SurfaceFactoryEgltest::LoadEGLGLES2Bindings(
    AddGLLibraryCallback add_gl_library,
    SetGLGetProcAddressProcCallback set_gl_get_proc_address) {
  DCHECK(thread_checker_.CalledOnValidThread());
  const char* egl_soname = eglplatform_shim_->ShimQueryString(SHIM_EGL_LIBRARY);
  const char* gles_soname =
      eglplatform_shim_->ShimQueryString(SHIM_GLES_LIBRARY);
  if (!egl_soname)
    egl_soname = kDefaultEglSoname;
  if (!gles_soname)
    gles_soname = kDefaultGlesSoname;

  return ::ui::LoadEGLGLES2Bindings(add_gl_library, set_gl_get_proc_address,
                                    egl_soname, gles_soname);
}

const int32* SurfaceFactoryEgltest::GetEGLSurfaceProperties(
    const int32* desired_list) {
  DCHECK(thread_checker_.CalledOnValidThread());
  static const int32 broken_props[] = {
      EGL_RENDERABLE_TYPE,
      EGL_OPENGL_ES2_BIT,
      EGL_SURFACE_TYPE,
      EGL_WINDOW_BIT | EGL_PBUFFER_BIT,
      EGL_NONE,
  };
  return broken_props;
}

// Test platform for EGL.
//
// This is a tiny EGL-based platform. Creation of the native window is
// handled by a separate library called eglplatform_shim.so.1 because
// this itself is platform specific and we want to test out multiple
// hardware platforms.
class OzonePlatformEgltest : public OzonePlatform {
 public:
  OzonePlatformEgltest() : shim_initialized_(false) {}
  ~OzonePlatformEgltest() override {
    if (shim_initialized_)
      eglplatform_shim_.ShimTerminate();
  }

  void LoadShim() {
    std::string library = GetShimLibraryName();

    if (eglplatform_shim_.Load(library))
      return;

    base::FilePath module_path;
    if (!PathService::Get(base::DIR_MODULE, &module_path))
      LOG(ERROR) << "failed to get DIR_MODULE from PathService";
    base::FilePath library_path = module_path.Append(library);

    if (eglplatform_shim_.Load(library_path.value()))
      return;

    LOG(FATAL) << "failed to load " << library;
  }

  void Initialize() {
    LoadShim();
    shim_initialized_ = eglplatform_shim_.ShimInitialize();
  }

  // OzonePlatform:
  ui::SurfaceFactoryOzone* GetSurfaceFactoryOzone() override {
    return surface_factory_ozone_.get();
  }
  OverlayManagerOzone* GetOverlayManager() override {
    return overlay_manager_.get();
  }
  CursorFactoryOzone* GetCursorFactoryOzone() override {
    return cursor_factory_ozone_.get();
  }
  InputController* GetInputController() override {
    return event_factory_ozone_->input_controller();
  }
  GpuPlatformSupport* GetGpuPlatformSupport() override {
    return gpu_platform_support_.get();
  }
  GpuPlatformSupportHost* GetGpuPlatformSupportHost() override {
    return gpu_platform_support_host_.get();
  }
  scoped_ptr<SystemInputInjector> CreateSystemInputInjector() override {
    return nullptr;  // no input injection support.
  }
  scoped_ptr<PlatformWindow> CreatePlatformWindow(
      PlatformWindowDelegate* delegate,
      const gfx::Rect& bounds) override {
    return make_scoped_ptr<PlatformWindow>(new EgltestWindow(
        delegate, &eglplatform_shim_, event_factory_ozone_.get(), bounds));
  }
  scoped_ptr<NativeDisplayDelegate> CreateNativeDisplayDelegate() override {
    return make_scoped_ptr(new NativeDisplayDelegateOzone());
  }

  void InitializeUI() override {
    device_manager_ = CreateDeviceManager();
    overlay_manager_.reset(new StubOverlayManager());
    KeyboardLayoutEngineManager::SetKeyboardLayoutEngine(
        make_scoped_ptr(new StubKeyboardLayoutEngine()));
    event_factory_ozone_.reset(new EventFactoryEvdev(
        NULL, device_manager_.get(),
        KeyboardLayoutEngineManager::GetKeyboardLayoutEngine()));
    cursor_factory_ozone_.reset(new CursorFactoryOzone());
    gpu_platform_support_host_.reset(CreateStubGpuPlatformSupportHost());
  }

  void InitializeGPU() override {
    surface_factory_ozone_.reset(new SurfaceFactoryEgltest(&eglplatform_shim_));
    gpu_platform_support_.reset(CreateStubGpuPlatformSupport());
  }

 private:
  LibeglplatformShimLoader eglplatform_shim_;
  scoped_ptr<DeviceManager> device_manager_;
  scoped_ptr<SurfaceFactoryEgltest> surface_factory_ozone_;
  scoped_ptr<EventFactoryEvdev> event_factory_ozone_;
  scoped_ptr<CursorFactoryOzone> cursor_factory_ozone_;
  scoped_ptr<GpuPlatformSupport> gpu_platform_support_;
  scoped_ptr<GpuPlatformSupportHost> gpu_platform_support_host_;
  scoped_ptr<OverlayManagerOzone> overlay_manager_;

  bool shim_initialized_;

  DISALLOW_COPY_AND_ASSIGN(OzonePlatformEgltest);
};

}  // namespace

OzonePlatform* CreateOzonePlatformEgltest() {
  OzonePlatformEgltest* platform = new OzonePlatformEgltest;
  platform->Initialize();
  return platform;
}

}  // namespace ui