Added initial implementation of Vulkan Render Passes.

gpu/vulkan/vulkan_surface.h

Index: gpu/vulkan/vulkan_surface.h
diff --git a/gpu/vulkan/vulkan_surface.h b/gpu/vulkan/vulkan_surface.h
index da6d847fa328403db3f390f9cdbfbdfa5c776e4d..0c85452146598494c844980cfd4902e6eb1de36d 100644
--- a/gpu/vulkan/vulkan_surface.h
+++ b/gpu/vulkan/vulkan_surface.h
@@ -5,18 +5,46 @@
 #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:
-  VulkanSurface();
-
   static bool InitializeOneOff();
 
- protected:
+  // 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();
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(VulkanSurface);
 };
 
 }  // namespace gfx