Added initial implementation of Vulkan Render Passes.

gpu/vulkan/vulkan_surface.h

 // Copyright (c) 2016 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.
 
 #ifndef GPU_VULKAN_VULKAN_SURFACE_H_
 #define GPU_VULKAN_VULKAN_SURFACE_H_
 
+#include "base/memory/scoped_ptr.h"
 #include "gpu/vulkan/vulkan_export.h"
+#include "ui/gfx/geometry/size.h"
+#include "ui/gfx/native_widget_types.h"
 
 namespace gfx {
 
 class VULKAN_EXPORT VulkanSurface {
  public:
+  static bool InitializeOneOff();
+
+  // Minimum bit depth of surface.
+  enum Format {
+    SURFACE_ARGB8888,
+    SURFACE_RGB565,
+    SURFACE_OSMESA_BGRA,
+    SURFACE_OSMESA_RGBA,

[piman, 2016/03/09 01:25:34]

I doubt OSMesa will ever support Vulkan.

[David Yen, 2016/03/10 01:39:49]

Done.

+
+    NUM_SURFACE_FORMATS,
+    SURFACE_DEFAULT = SURFACE_ARGB8888
+  };
+
+  virtual bool Initialize(VulkanSurface::Format format) = 0;
+  virtual void Destroy() = 0;
+
+  virtual ~VulkanSurface();
+
+  // Create a surface that render directlys into a surface.
+  static scoped_ptr<gfx::VulkanSurface> CreateViewSurface(
+      gfx::AcceleratedWidget window);
+
+  // Create a surface for offscreen rendering.

[piman, 2016/03/09 01:25:34]

I don't think we want this. It was necessary in GL because you need a surface to
use a context at all (to make current), but in Vulkan this is not needed - we
can use the device without any "current" surface

[David Yen, 2016/03/10 01:39:49]

Done.

+  static scoped_ptr<gfx::VulkanSurface> CreateOffscreenSurface(
+      const gfx::Size& size);
+
+ protected:
   VulkanSurface();
 
-  static bool InitializeOneOff();
-
- protected:
-  virtual ~VulkanSurface();
+ private:
+  DISALLOW_COPY_AND_ASSIGN(VulkanSurface);
 };
 
 }  // namespace gfx
 
 #endif  // GPU_VULKAN_VULKAN_SURFACE_H_