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"
+#include "ui/gfx/swap_result.h"
 
 namespace gpu {
 
 class VULKAN_EXPORT VulkanSurface {
  public:
+  static bool InitializeOneOff();
+
+  // Minimum bit depth of surface.
+  enum Format {
+    SURFACE_GBRA8888,

[piman, 2016/03/11 03:07:52]

nit: GBRA->BGRA?

BTW, we can start with this, but thinking more about it, I suspect we won't
really have a choice, at least on desktop. The available formats are likely
fixed based on the visual/format of the underlying window. It may make more
sense to just create the window based on what we want (16 vs 32 bits), then
create the VulkanSurface, and then query the format.

[David Yen, 2016/03/21 18:26:31]

Done.

That's interesting about the format choice, I will keep that in mind as we
progress. So some desktops won't support VK_FORMAT_B8G8R8A8_UNORM? I would
assume that would be supported everywhere which is why I chose it to be the
default format.

+    SURFACE_RGB565,
+
+    NUM_SURFACE_FORMATS,
+    SURFACE_DEFAULT = SURFACE_GBRA8888
+  };
+
+  virtual ~VulkanSurface() = 0;
+
+  virtual bool Initialize(VulkanSurface::Format format) = 0;
+  virtual void Destroy() = 0;
+
+  virtual gfx::SwapResult SwapBuffers() = 0;
+
+  // Create a surface that render directlys into a surface.
+  static scoped_ptr<VulkanSurface> CreateViewSurface(
+      gfx::AcceleratedWidget window);
+
+ protected:
   VulkanSurface();
 
-  static bool InitializeOneOff();
-
- protected:
-  virtual ~VulkanSurface();
+ private:
+  DISALLOW_COPY_AND_ASSIGN(VulkanSurface);
 };
 
 }  // namespace gpu
 
 #endif  // GPU_VULKAN_VULKAN_SURFACE_H_