ozone: Add overlay candidate implementation that queries support via IPC

ui/ozone/common/gpu/ozone_gpu_messages.h

 // 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.
 
 // Multiply-included message file, hence no include guard here, but see below
 // for a much smaller-than-usual include guard section.
 
 #include <vector>
 
 #include "base/file_descriptor_posix.h"
@@ skipping 11 matching lines @@
 #undef IPC_MESSAGE_EXPORT
 #define IPC_MESSAGE_EXPORT OZONE_EXPORT
 
 #define IPC_MESSAGE_START OzoneGpuMsgStart
 
 IPC_ENUM_TRAITS_MAX_VALUE(ui::DisplayConnectionType,
                           ui::DISPLAY_CONNECTION_TYPE_LAST)
 
 IPC_ENUM_TRAITS_MAX_VALUE(ui::HDCPState, ui::HDCP_STATE_LAST)
 
+IPC_ENUM_TRAITS_MAX_VALUE(gfx::OverlayTransform, gfx::OVERLAY_TRANSFORM_LAST)
+
+IPC_ENUM_TRAITS_MAX_VALUE(ui::SurfaceFactoryOzone::BufferFormat,
+                          ui::SurfaceFactoryOzone::BUFFER_FORMAT_LAST)
+
 // clang-format off
-
 IPC_STRUCT_TRAITS_BEGIN(ui::DisplayMode_Params)
   IPC_STRUCT_TRAITS_MEMBER(size)
   IPC_STRUCT_TRAITS_MEMBER(is_interlaced)
   IPC_STRUCT_TRAITS_MEMBER(refresh_rate)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(ui::DisplaySnapshot_Params)
   IPC_STRUCT_TRAITS_MEMBER(display_id)
   IPC_STRUCT_TRAITS_MEMBER(origin)
   IPC_STRUCT_TRAITS_MEMBER(physical_size)
   IPC_STRUCT_TRAITS_MEMBER(type)
   IPC_STRUCT_TRAITS_MEMBER(is_aspect_preserving_scaling)
   IPC_STRUCT_TRAITS_MEMBER(has_overscan)
   IPC_STRUCT_TRAITS_MEMBER(display_name)
   IPC_STRUCT_TRAITS_MEMBER(modes)
   IPC_STRUCT_TRAITS_MEMBER(has_current_mode)
   IPC_STRUCT_TRAITS_MEMBER(current_mode)
   IPC_STRUCT_TRAITS_MEMBER(has_native_mode)
   IPC_STRUCT_TRAITS_MEMBER(native_mode)
   IPC_STRUCT_TRAITS_MEMBER(product_id)
   IPC_STRUCT_TRAITS_MEMBER(string_representation)
 IPC_STRUCT_TRAITS_END()
 
 IPC_STRUCT_TRAITS_BEGIN(ui::GammaRampRGBEntry)
   IPC_STRUCT_TRAITS_MEMBER(r)
   IPC_STRUCT_TRAITS_MEMBER(g)
   IPC_STRUCT_TRAITS_MEMBER(b)
 IPC_STRUCT_TRAITS_END()
 
+IPC_STRUCT_TRAITS_BEGIN(ui::OverlayCheck_Params)
+  IPC_STRUCT_TRAITS_MEMBER(buffer_size)
+  IPC_STRUCT_TRAITS_MEMBER(transform)
+  IPC_STRUCT_TRAITS_MEMBER(format)
+  IPC_STRUCT_TRAITS_MEMBER(display_rect)
+  IPC_STRUCT_TRAITS_MEMBER(plane_z_order)
+IPC_STRUCT_TRAITS_END()

[spang, 2015/06/01 18:54:21]

newline

[achaulk, 2015/06/01 20:43:08]

Done.

 // clang-format on
 
 //------------------------------------------------------------------------------
 // GPU Messages
 // These are messages from the browser to the GPU process.
 
 // Update the HW cursor bitmap & move to specified location.
 IPC_MESSAGE_CONTROL4(OzoneGpuMsg_CursorSet,
                      gfx::AcceleratedWidget,
                      std::vector<SkBitmap>,
@@ skipping 48 matching lines @@
 
 IPC_MESSAGE_CONTROL2(OzoneGpuMsg_SetHDCPState,
                      int64_t /* display_id */,
                      ui::HDCPState /* state */)
 
 // Provides the gamma ramp for display adjustment.
 IPC_MESSAGE_CONTROL2(OzoneGpuMsg_SetGammaRamp,
                      int64_t,                             // display ID,
                      std::vector<ui::GammaRampRGBEntry>)  // lut
 
+IPC_MESSAGE_CONTROL2(OzoneGpuMsg_CheckOverlayCapabilities,
+                     gfx::AcceleratedWidget /* widget */,
+                     std::vector<ui::OverlayCheck_Params> /* overlays */)
+
 //------------------------------------------------------------------------------
 // Browser Messages
 // These messages are from the GPU to the browser process.
 
 // Updates the list of active displays.
 IPC_MESSAGE_CONTROL1(OzoneHostMsg_UpdateNativeDisplays,
                      std::vector<ui::DisplaySnapshot_Params>)
 
 IPC_MESSAGE_CONTROL2(OzoneHostMsg_DisplayConfigured,
                      int64_t /* display_id */,
                      bool /* status */)
 
 // Response for OzoneGpuMsg_GetHDCPState.
 IPC_MESSAGE_CONTROL3(OzoneHostMsg_HDCPStateReceived,
                      int64_t /* display_id */,
                      bool /* success */,
                      ui::HDCPState /* state */)
 
 // Response for OzoneGpuMsg_SetHDCPState.
 IPC_MESSAGE_CONTROL2(OzoneHostMsg_HDCPStateUpdated,
                      int64_t /* display_id */,
                      bool /* success */)
+
+// Response for OzoneGpuMsg_CheckOverlayCapabilities
+IPC_MESSAGE_CONTROL2(OzoneHostMsg_OverlayCapabilitiesReceived,
+                     gfx::AcceleratedWidget /* widget */,
+                     bool /* result */)