Move some of the adding stencil attachment logic of Gpu and into Render Target.

src/gpu/gl/GrGLRenderTarget.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef GrGLRenderTarget_DEFINED
 #define GrGLRenderTarget_DEFINED
 
 #include "GrGLIRect.h"
 #include "GrRenderTarget.h"
 #include "SkScalar.h"
 
 class GrGLGpu;
+class GrGLStencilAttachment;
 
 class GrGLRenderTarget : public GrRenderTarget {
 public:
     // set fTexFBOID to this value to indicate that it is multisampled but
     // Gr doesn't know how to resolve it.
     enum { kUnresolvableFBOID = 0 };
 
     struct IDDesc {
         GrGLuint                     fRTFBOID;
         GrGLuint                     fTexFBOID;
         GrGLuint                     fMSColorRenderbufferID;
         GrGpuResource::LifeCycle     fLifeCycle;
         GrRenderTarget::SampleConfig fSampleConfig;
     };
 
-    GrGLRenderTarget(GrGLGpu*, const GrSurfaceDesc&, const IDDesc&);
+    static GrGLRenderTarget* CreateWrapped(GrGLGpu*,
+                                           const GrSurfaceDesc&,
+                                           const IDDesc&,
+                                           int stencilBits);
 
     void setViewport(const GrGLIRect& rect) { fViewport = rect; }
     const GrGLIRect& getViewport() const { return fViewport; }
 
     // The following two functions return the same ID when a
     // texture/render target is multisampled, and different IDs when
     // it is.
     // FBO ID used to render into
     GrGLuint renderFBOID() const { return fRTFBOID; }
     // FBO ID that has texture ID attached.
@@ skipping 28 matching lines @@
 
     void init(const GrSurfaceDesc&, const IDDesc&);
 
     void onAbandon() override;
     void onRelease() override;
 
     // In protected because subclass GrGLTextureRenderTarget calls this version.
     size_t onGpuMemorySize() const override;
 
 private:
+    // This ctor is used only for creating wrapped render targets and is only called for the static
+    // create function CreateWrapped(...).
+    GrGLRenderTarget(GrGLGpu*, const GrSurfaceDesc&, const IDDesc&, GrGLStencilAttachment*);
+
+    GrGLGpu* getGLGpu() const;
+    bool completeStencilAttachment() override;
+
     GrGLuint    fRTFBOID;
     GrGLuint    fTexFBOID;
     GrGLuint    fMSColorRenderbufferID;
 
     // We track this separately from GrGpuResource because this may be both a texture and a render
     // target, and the texture may be wrapped while the render target is not.
     LifeCycle   fRTLifecycle;
 
     // when we switch to this render target we want to set the viewport to
     // only render to content area (as opposed to the whole allocation) and
     // we want the rendering to be at top left (GL has origin in bottom left)
     GrGLIRect   fViewport;
 
     // onGpuMemorySize() needs to know the VRAM footprint of the FBO(s). However, abandon and
     // release zero out the IDs and the cache needs to know the size even after those actions.
     size_t      fGpuMemorySize;
 
     typedef GrRenderTarget INHERITED;
 };
 
 #endif