Ozone: Dont hardcode format to YUV when using Overlay Composition.

ui/ozone/platform/drm/gpu/overlay_plane.h

Index: ui/ozone/platform/drm/gpu/overlay_plane.h
diff --git a/ui/ozone/platform/drm/gpu/overlay_plane.h b/ui/ozone/platform/drm/gpu/overlay_plane.h
index d1d32a6e3880573043fd697897e82f00c0de3741..02167364acd25b7a3da500d065df53192fcafb60 100644
--- a/ui/ozone/platform/drm/gpu/overlay_plane.h
+++ b/ui/ozone/platform/drm/gpu/overlay_plane.h
@@ -8,6 +8,7 @@
 #include <vector>
 
 #include "base/memory/ref_counted.h"
+#include "ui/gfx/buffer_types.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/geometry/rect_f.h"
 #include "ui/gfx/overlay_transform.h"
@@ -42,6 +43,22 @@ struct OZONE_EXPORT OverlayPlane {
   gfx::RectF crop_rect;
 };
 
+struct OZONE_EXPORT OverlayBufferConfiguration {

[dnicoara, 2015/11/09 20:53:23]

This seems to only be used in DrmWindow. Maybe just declare it in there, in the
anonymous namespace.

[kalyank, 2015/11/09 21:44:05]

Eventually, we want to query this information in GbmBuffer and other places
interested in this information i.e. VaapiDrmPicture.
Currently, we have logic in GbmBuffer as to when scaling is needed and use VPP
hardware unit(in case of Video buffer)for this purpose.
Also, https://codereview.chromium.org/1422563002/ extends support in GbmBuffer
to add YUV support for Overlay when playing Videobuffer. We should consolidate
all this logic in one place and make sure we are using the same during test
commits.

[dnicoara, 2015/11/09 22:26:42]

Acknowledged.

[kalyank, 2015/11/19 16:10:41]

Removed this and saved needed data as part of overlaycheck_params

+  OverlayBufferConfiguration(gfx::BufferFormat buffer_format,
+                             gfx::Size buffer_size,

[dnicoara, 2015/11/09 20:53:23]

nit: const gfx::Size&

+                             bool handle_scaling);
+
+  ~OverlayBufferConfiguration();
+
+  // This is optimal storage format for the buffer.
+  gfx::BufferFormat buffer_format;
+  // This is the required buffer size.
+  gfx::Size buffer_size;
+  // Hardware doesn't have support for plane scaling and the buffer needs to
+  // be scaled using other means i.e. 3D Engine, VPP etc.
+  bool handle_scaling;
+};
+
 }  // namespace ui
 
 #endif  // UI_OZONE_PLATFORM_DRM_GPU_OVERLAY_PLANE_H_