components: Add Exosphere component.

components/exo/wayland/server.cc

+// Copyright 2015 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 "components/exo/wayland/server.h"
+
+#include <wayland-server-core.h>
+#include <wayland-server-protocol-core.h>
+
+#include <algorithm>
+
+#include "base/bind.h"
+#include "base/cancelable_callback.h"
+#include "base/strings/utf_string_conversions.h"
+#include "components/exo/buffer.h"
+#include "components/exo/display.h"
+#include "components/exo/shared_memory.h"
+#include "components/exo/shell_surface.h"
+#include "components/exo/surface.h"
+#include "third_party/skia/include/core/SkRegion.h"
+
+namespace exo {
+namespace wayland {
+namespace {
+
+template <class T>
+T* GetUserDataAs(wl_resource* resource) {
+  return static_cast<T*>(wl_resource_get_user_data(resource));
+}
+
+template <class T>
+scoped_ptr<T> TakeUserDataAs(wl_resource* resource) {
+  scoped_ptr<T> user_data = make_scoped_ptr(GetUserDataAs<T>(resource));
+  wl_resource_set_user_data(resource, nullptr);
+  return user_data.Pass();
+}
+
+template <class T>
+void DestroyUserData(wl_resource* resource) {
+  TakeUserDataAs<T>(resource);
+}
+
+template <class T>
+void SetImplementation(wl_resource* resource,
+                       const void* implementation,
+                       scoped_ptr<T> user_data) {
+  wl_resource_set_implementation(resource, implementation, user_data.release(),
+                                 DestroyUserData<T>);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// wl_buffer_interface:
+
+void buffer_destroy(wl_client* client, wl_resource* resource) {
+  wl_resource_destroy(resource);
+}
+
+const struct wl_buffer_interface buffer_implementation = {buffer_destroy};
+
+////////////////////////////////////////////////////////////////////////////////
+// wl_surface_interface:
+
+void surface_destroy(wl_client* client, wl_resource* resource) {
+  wl_resource_destroy(resource);
+}
+
+void surface_attach(wl_client* client,
+                    wl_resource* resource,
+                    wl_resource* buffer,
+                    int32_t x,
+                    int32_t y) {
+  // TODO(reveman): Implement buffer offset support.
+  if (x || y) {
+    wl_resource_post_no_memory(resource);
+    return;
+  }
+
+  GetUserDataAs<Surface>(resource)
+      ->Attach(buffer ? GetUserDataAs<Buffer>(buffer) : nullptr);
+}
+
+void surface_damage(wl_client* client,
+                    wl_resource* resource,
+                    int32_t x,
+                    int32_t y,
+                    int32_t width,
+                    int32_t height) {
+  GetUserDataAs<Surface>(resource)->Damage(gfx::Rect(x, y, width, height));
+}
+
+void handle_surface_frame_callback(wl_resource* resource,
+                                   base::TimeTicks frame_time) {
+  if (!frame_time.is_null()) {
+    wl_callback_send_done(resource,
+                          (frame_time - base::TimeTicks()).InMilliseconds());
+    // TODO(reveman): Remove this potentially blocking flush and instead watch
+    // the file descriptor to be ready for write without blocking.
+    wl_client_flush(wl_resource_get_client(resource));
+  }
+  wl_resource_destroy(resource);
+}
+
+void surface_frame(wl_client* client,
+                   wl_resource* resource,
+                   uint32_t callback) {
+  wl_resource* callback_resource =
+      wl_resource_create(client, &wl_callback_interface, 1, callback);
+  if (!callback_resource) {
+    wl_resource_post_no_memory(resource);
+    return;
+  }
+
+  // base::Unretained is safe as the resource owns the callback.
+  scoped_ptr<base::CancelableCallback<void(base::TimeTicks)>>
+  cancelable_callback(new base::CancelableCallback<void(base::TimeTicks)>(
+      base::Bind(&handle_surface_frame_callback,
+                 base::Unretained(callback_resource))));
+
+  GetUserDataAs<Surface>(resource)
+      ->RequestFrameCallback(cancelable_callback->callback());
+
+  SetImplementation(callback_resource, nullptr, cancelable_callback.Pass());
+}
+
+void surface_set_opaque_region(wl_client* client,
+                               wl_resource* resource,
+                               wl_resource* region_resource) {
+  GetUserDataAs<Surface>(resource)->SetOpaqueRegion(
+      region_resource ? *GetUserDataAs<SkRegion>(region_resource)
+                      : SkRegion(SkIRect::MakeEmpty()));
+}
+
+void surface_set_input_region(wl_client* client,
+                              wl_resource* resource,
+                              wl_resource* region_resource) {
+  NOTIMPLEMENTED();
+}
+
+void surface_commit(wl_client* client, wl_resource* resource) {
+  GetUserDataAs<Surface>(resource)->Commit();
+}
+
+void surface_set_buffer_transform(wl_client* client,
+                                  wl_resource* resource,
+                                  int transform) {
+  NOTIMPLEMENTED();
+}
+
+void surface_set_buffer_scale(wl_client* client,
+                              wl_resource* resource,
+                              int32_t scale) {
+  NOTIMPLEMENTED();
+}
+
+const struct wl_surface_interface surface_implementation = {
+    surface_destroy,
+    surface_attach,
+    surface_damage,
+    surface_frame,
+    surface_set_opaque_region,
+    surface_set_input_region,
+    surface_commit,
+    surface_set_buffer_transform,
+    surface_set_buffer_scale};
+
+////////////////////////////////////////////////////////////////////////////////
+// wl_region_interface:
+
+void region_destroy(wl_client* client, wl_resource* resource) {
+  wl_resource_destroy(resource);
+}
+
+void region_add(wl_client* client,
+                wl_resource* resource,
+                int32_t x,
+                int32_t y,
+                int32_t width,
+                int32_t height) {
+  GetUserDataAs<SkRegion>(resource)
+      ->op(SkIRect::MakeXYWH(x, y, width, height), SkRegion::kUnion_Op);
+}
+
+static void region_subtract(wl_client* client,
+                            wl_resource* resource,
+                            int32_t x,
+                            int32_t y,
+                            int32_t width,
+                            int32_t height) {
+  GetUserDataAs<SkRegion>(resource)
+      ->op(SkIRect::MakeXYWH(x, y, width, height), SkRegion::kDifference_Op);
+}
+
+const struct wl_region_interface region_implementation = {
+    region_destroy, region_add, region_subtract};
+
+////////////////////////////////////////////////////////////////////////////////
+// wl_compositor_interface:
+
+void compositor_create_surface(wl_client* client,
+                               wl_resource* resource,
+                               uint32_t id) {
+  scoped_ptr<Surface> surface =
+      GetUserDataAs<Display>(resource)->CreateSurface();
+  DCHECK(surface);
+
+  wl_resource* surface_resource = wl_resource_create(
+      client, &wl_surface_interface, wl_resource_get_version(resource), id);
+  if (!surface_resource) {
+    wl_resource_post_no_memory(resource);
+    return;
+  }
+
+  SetImplementation(surface_resource, &surface_implementation, surface.Pass());
+}
+
+void compositor_create_region(wl_client* client,
+                              wl_resource* resource,
+                              uint32_t id) {
+  scoped_ptr<SkRegion> region(new SkRegion);
+
+  wl_resource* region_resource =
+      wl_resource_create(client, &wl_region_interface, 1, id);
+  if (!region_resource) {
+    wl_resource_post_no_memory(resource);
+    return;
+  }
+
+  SetImplementation(region_resource, &region_implementation, region.Pass());
+}
+
+const struct wl_compositor_interface compositor_implementation = {
+    compositor_create_surface, compositor_create_region};
+
+const uint32_t compositor_version = 3;
+
+void bind_compositor(wl_client* client,
+                     void* data,
+                     uint32_t version,
+                     uint32_t id) {
+  wl_resource* resource =
+      wl_resource_create(client, &wl_compositor_interface,
+                         std::min(version, compositor_version), id);
+  if (!resource) {
+    wl_client_post_no_memory(client);
+    return;
+  }
+
+  wl_resource_set_implementation(resource, &compositor_implementation, data,
+                                 nullptr);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// wl_shm_pool_interface:
+
+const struct shm_supported_format {
+  uint32_t shm_format;
+  gfx::BufferFormat buffer_format;
+} shm_supported_formats[] = {
+    {WL_SHM_FORMAT_XBGR8888, gfx::BufferFormat::RGBX_8888},
+    {WL_SHM_FORMAT_ABGR8888, gfx::BufferFormat::RGBA_8888},
+    {WL_SHM_FORMAT_XRGB8888, gfx::BufferFormat::BGRX_8888},
+    {WL_SHM_FORMAT_ARGB8888, gfx::BufferFormat::BGRA_8888}};
+
+void shm_pool_create_buffer(wl_client* client,
+                            wl_resource* resource,
+                            uint32_t id,
+                            int32_t offset,
+                            int32_t width,
+                            int32_t height,
+                            int32_t stride,
+                            uint32_t format) {
+  const auto supported_format =
+      std::find_if(shm_supported_formats,
+                   shm_supported_formats + arraysize(shm_supported_formats),
+                   [format](const shm_supported_format& supported_format) {
+                     return supported_format.shm_format == format;
+                   });
+  if (supported_format ==
+      (shm_supported_formats + arraysize(shm_supported_formats))) {
+    wl_resource_post_error(resource, WL_SHM_ERROR_INVALID_FORMAT,
+                           "invalid format 0x%x", format);
+    return;
+  }
+
+  if (offset < 0) {
+    wl_resource_post_error(resource, WL_SHM_ERROR_INVALID_FORMAT,
+                           "invalid offset %d", offset);
+    return;
+  }
+
+  scoped_ptr<Buffer> buffer =
+      GetUserDataAs<SharedMemory>(resource)
+          ->CreateBuffer(gfx::Size(width, height),
+                         supported_format->buffer_format, offset, stride);
+  if (!buffer) {
+    wl_resource_post_no_memory(resource);
+    return;
+  }
+
+  wl_resource* buffer_resource =
+      wl_resource_create(client, &wl_buffer_interface, 1, id);
+  if (!buffer_resource) {
+    wl_resource_post_no_memory(resource);
+    return;
+  }
+
+  buffer->set_release_callback(
+      base::Bind(&wl_buffer_send_release, base::Unretained(buffer_resource)));
+
+  SetImplementation(buffer_resource, &buffer_implementation, buffer.Pass());
+}
+
+void shm_pool_destroy(wl_client* client, wl_resource* resource) {
+  wl_resource_destroy(resource);
+}
+
+void shm_pool_resize(wl_client* client, wl_resource* resource, int32_t size) {
+  // Nothing to do here.
+}
+
+const struct wl_shm_pool_interface shm_pool_implementation = {
+    shm_pool_create_buffer, shm_pool_destroy, shm_pool_resize};
+
+////////////////////////////////////////////////////////////////////////////////
+// wl_shm_interface:
+
+void shm_create_pool(wl_client* client,
+                     wl_resource* resource,
+                     uint32_t id,
+                     int fd,
+                     int32_t size) {
+  scoped_ptr<SharedMemory> shared_memory =
+      GetUserDataAs<Display>(resource)
+          ->CreateSharedMemory(base::FileDescriptor(fd, true), size);
+  if (!shared_memory) {
+    wl_resource_post_no_memory(resource);
+    return;
+  }
+
+  wl_resource* shm_pool_resource =
+      wl_resource_create(client, &wl_shm_pool_interface, 1, id);
+  if (!shm_pool_resource) {
+    wl_resource_post_no_memory(resource);
+    return;
+  }
+
+  SetImplementation(shm_pool_resource, &shm_pool_implementation,
+                    shared_memory.Pass());
+}
+
+const struct wl_shm_interface shm_implementation = {shm_create_pool};
+
+void bind_shm(wl_client* client, void* data, uint32_t version, uint32_t id) {
+  wl_resource* resource = wl_resource_create(client, &wl_shm_interface, 1, id);
+  if (!resource) {
+    wl_client_post_no_memory(client);
+    return;
+  }
+
+  wl_resource_set_implementation(resource, &shm_implementation, data, nullptr);
+
+  for (const auto& supported_format : shm_supported_formats)
+    wl_shm_send_format(resource, supported_format.shm_format);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// wl_shell_surface_interface:
+
+void shell_surface_pong(wl_client* client,
+                        wl_resource* resource,
+                        uint32_t serial) {
+  NOTIMPLEMENTED();
+}
+
+void shell_surface_move(wl_client* client,
+                        wl_resource* resource,
+                        wl_resource* seat_resource,
+                        uint32_t serial) {
+  NOTIMPLEMENTED();
+}
+
+void shell_surface_resize(wl_client* client,
+                          wl_resource* resource,
+                          wl_resource* seat_resource,
+                          uint32_t serial,
+                          uint32_t edges) {
+  NOTIMPLEMENTED();
+}
+
+void shell_surface_set_toplevel(wl_client* client, wl_resource* resource) {
+  GetUserDataAs<ShellSurface>(resource)->SetToplevel();
+}
+
+void shell_surface_set_transient(wl_client* client,
+                                 wl_resource* resource,
+                                 wl_resource* parent_resource,
+                                 int x,
+                                 int y,
+                                 uint32_t flags) {
+  NOTIMPLEMENTED();
+}
+
+void shell_surface_set_fullscreen(wl_client* client,
+                                  wl_resource* resource,
+                                  uint32_t method,
+                                  uint32_t framerate,
+                                  wl_resource* output_resource) {
+  GetUserDataAs<ShellSurface>(resource)->SetFullscreen(true);
+}
+
+void shell_surface_set_popup(wl_client* client,
+                             wl_resource* resource,
+                             wl_resource* seat_resource,
+                             uint32_t serial,
+                             wl_resource* parent_resource,
+                             int32_t x,
+                             int32_t y,
+                             uint32_t flags) {
+  NOTIMPLEMENTED();
+}
+
+void shell_surface_set_maximized(wl_client* client,
+                                 wl_resource* resource,
+                                 wl_resource* output_resource) {
+  NOTIMPLEMENTED();
+}
+
+void shell_surface_set_title(wl_client* client,
+                             wl_resource* resource,
+                             const char* title) {
+  GetUserDataAs<ShellSurface>(resource)
+      ->SetTitle(base::string16(base::ASCIIToUTF16(title)));
+}
+
+void shell_surface_set_class(wl_client* client,
+                             wl_resource* resource,
+                             const char* clazz) {
+  NOTIMPLEMENTED();
+}
+
+const struct wl_shell_surface_interface shell_surface_implementation = {
+    shell_surface_pong,          shell_surface_move,
+    shell_surface_resize,        shell_surface_set_toplevel,
+    shell_surface_set_transient, shell_surface_set_fullscreen,
+    shell_surface_set_popup,     shell_surface_set_maximized,
+    shell_surface_set_title,     shell_surface_set_class};
+
+////////////////////////////////////////////////////////////////////////////////
+// wl_shell_interface:
+
+void shell_get_shell_surface(wl_client* client,
+                             wl_resource* resource,
+                             uint32_t id,
+                             wl_resource* surface) {
+  scoped_ptr<ShellSurface> shell_surface =
+      GetUserDataAs<Display>(resource)
+          ->CreateShellSurface(GetUserDataAs<Surface>(surface));
+  if (!shell_surface) {
+    wl_resource_post_no_memory(resource);
+    return;
+  }
+
+  wl_resource* shell_surface_resource =
+      wl_resource_create(client, &wl_shell_surface_interface, 1, id);
+  if (!shell_surface_resource) {
+    wl_resource_post_no_memory(resource);
+    return;
+  }
+
+  SetImplementation(shell_surface_resource, &shell_surface_implementation,
+                    shell_surface.Pass());
+}
+
+const struct wl_shell_interface shell_implementation = {
+    shell_get_shell_surface};
+
+void bind_shell(wl_client* client, void* data, uint32_t version, uint32_t id) {
+  wl_resource* resource =
+      wl_resource_create(client, &wl_shell_interface, 1, id);
+  if (!resource) {
+    wl_client_post_no_memory(client);
+    return;
+  }
+  wl_resource_set_implementation(resource, &shell_implementation, data,
+                                 nullptr);
+}
+
+}  // namespace
+
+////////////////////////////////////////////////////////////////////////////////
+// Server, public:
+
+Server::Server(Display* display)
+    : display_(display), wl_display_(wl_display_create()) {
+  wl_global_create(wl_display_.get(), &wl_compositor_interface,
+                   compositor_version, display_, bind_compositor);
+  wl_global_create(wl_display_.get(), &wl_shm_interface, 1, display_, bind_shm);
+  wl_global_create(wl_display_.get(), &wl_shell_interface, 1, display_,
+                   bind_shell);
+}
+
+Server::~Server() {}
+
+// static
+scoped_ptr<Server> Server::Create(Display* display) {
+  scoped_ptr<Server> server(new Server(display));
+  int rv = wl_display_add_socket(server->wl_display_.get(), nullptr);
+  DCHECK_EQ(rv, 0) << "wl_display_add_socket failed: " << rv;
+  return server;
+}
+
+bool Server::AddSocket(const std::string name) {
+  DCHECK(!name.empty());
+  return !wl_display_add_socket(wl_display_.get(), name.c_str());
+}
+
+int Server::GetFileDescriptor() const {
+  wl_event_loop* event_loop = wl_display_get_event_loop(wl_display_.get());
+  DCHECK(event_loop);
+  return wl_event_loop_get_fd(event_loop);
+}
+
+void Server::Dispatch(base::TimeDelta timeout) {
+  wl_event_loop* event_loop = wl_display_get_event_loop(wl_display_.get());
+  DCHECK(event_loop);
+  wl_event_loop_dispatch(event_loop, timeout.InMilliseconds());
+}
+
+void Server::Flush() {
+  wl_display_flush_clients(wl_display_.get());
+}
+
+}  // namespace wayland
+}  // namespace exo