Support mouse cursor in DesktopCaptureDeviceAura.

Perform an in-place alpha blending of an ARGB cursor bitmap on a YUV420 video frame.

BUG=326000
R=oshima@chromium.org, sergeyu@chromium.org
TBR=ben@chromium.org
TEST=mouse cursor rendered correctly (position, shape and scale) during destkop sharing on Chrome OS.

Review URL: https://codereview.chromium.org/108193015

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@241106 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 31 insertions, 0 deletions

diff --git a/ui/base/cursor/cursors_aura.cc b/ui/base/cursor/cursors_aura.cc
index 64944d6..54546f4 100644
--- a/ui/base/cursor/cursors_aura.cc
+++ b/ui/base/cursor/cursors_aura.cc
@@ -5,7 +5,9 @@
 #include "ui/base/cursor/cursors_aura.h"
 
 #include "grit/ui_resources.h"
+#include "third_party/skia/include/core/SkBitmap.h"
 #include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/point.h"
 
 namespace ui {
@@ -219,4 +221,25 @@ bool GetAnimatedCursorDataFor(CursorSetType cursor_set_id,
                      id, scale_factor, resource_id, point);
 }
 
+bool GetCursorBitmap(const Cursor& cursor,
+                     SkBitmap* bitmap,
+                     gfx::Point* point) {
+  DCHECK(bitmap && point);
+  int resource_id;
+  if (!GetCursorDataFor(ui::CURSOR_SET_NORMAL,
+                        cursor.native_type(),
+                        cursor.device_scale_factor(),
+                        &resource_id,
+                        point)) {
+    return false;
+  }
+
+  const SkBitmap* cursor_bitmap = ResourceBundle::GetSharedInstance().
+      GetImageSkiaNamed(resource_id)->bitmap();
+  if (!cursor_bitmap)
+    return false;
+  *bitmap = *cursor_bitmap;
+  return true;
+}
+
 }  // namespace ui
diff --git a/ui/base/cursor/cursors_aura.h b/ui/base/cursor/cursors_aura.h
index e916c28..7d098a1 100644
--- a/ui/base/cursor/cursors_aura.h
+++ b/ui/base/cursor/cursors_aura.h
@@ -8,6 +8,8 @@
 #include "ui/base/cursor/cursor.h"
 #include "ui/base/ui_export.h"
 
+class SkBitmap;
+
 namespace gfx {
 class Point;
 }
@@ -33,6 +35,12 @@ bool UI_EXPORT GetAnimatedCursorDataFor(CursorSetType cursor_set_id,
                                         int* resource_id,
                                         gfx::Point* point);
 
+// Returns the cursor bitmap for |cursor|. Returns false if |cursor| is invalid.
+// The cursor hot point location is set in |point|.
+bool UI_EXPORT GetCursorBitmap(const Cursor& cursor,
+                               SkBitmap* bitmap,
+                               gfx::Point* point);
+
 }  // namespace ui
 
 #endif  // UI_BASE_CURSOR_CURSORS_AURA_H_