Adding Ozone CursorLoader and necessary API functions to allow setting the cursor in SoftwareFactor…

ui/base/cursor/cursor_loader_ozone.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/base/cursor/cursor_loader_ozone.h"
+
+#include "ui/base/cursor/cursor.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/image/image_skia.h"
+
+namespace ui {
+
+namespace {
+
+// Creates a 1x1 cursor which will be fully transparent.
+SkBitmap CreateInvisibleCursor() {
+  SkBitmap cursor;
+  cursor.setConfig(SkBitmap::kARGB_8888_Config, 1, 1);
+  cursor.allocPixels();
+
+  cursor.lockPixels();
+  cursor.eraseARGB(0, 0, 0, 0);
+  cursor.unlockPixels();
+
+  return cursor;
+}
+
+}  // namespace
+
+CursorLoaderOzone::CursorLoaderOzone() {
+  cursors_[kCursorNone] = CreateInvisibleCursor();
+}
+
+CursorLoaderOzone::~CursorLoaderOzone() {}
+
+void CursorLoaderOzone::LoadImageCursor(int id,

[rjkroege, 2014/02/11 21:57:55]

this code as written never removes cursors. how are custom cursors set by the
renderer cleaned up?

[dnicoara, 2014/02/12 16:18:19]

I've added a call to clear in UnloadAll. It wasn't clear if this is required by
looking at the X11 impl. I think that we should probably clear the vectors in
the X11 impl as well otherwise it may reference destroyed resources.

+                                        int resource_id,
+                                        const gfx::Point& hot) {
+  const gfx::ImageSkia* image = ResourceBundle::GetSharedInstance()
+      .GetImageSkiaNamed(resource_id);
+  const gfx::ImageSkiaRep& image_rep = image->GetRepresentation(
+      display().device_scale_factor());
+
+  cursors_[id] = image_rep.sk_bitmap();
+}
+
+void CursorLoaderOzone::LoadAnimatedCursor(int id,
+                                           int resource_id,
+                                           const gfx::Point& hot,
+                                           int frame_delay_ms) {
+  NOTIMPLEMENTED();
+}
+
+void CursorLoaderOzone::UnloadAll() {}
+
+void CursorLoaderOzone::SetPlatformCursor(gfx::NativeCursor* cursor) {
+  if (cursors_.find(cursor->native_type()) != cursors_.end()) {
+    cursor->SetPlatformCursor(&cursors_[cursor->native_type()]);
+  } else if (*cursor == kCursorCustom) {
+    cursor->SetPlatformCursor(cursor->platform());
+  } else {
+    cursor->SetPlatformCursor(&cursors_[kCursorPointer]);
+  }
+}
+
+CursorLoader* CursorLoader::Create() {
+  return new CursorLoaderOzone();
+}
+
+}  // namespace ui