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

src/gpu/gl/GrGLRenderTarget.cpp

Index: src/gpu/gl/GrGLRenderTarget.cpp
diff --git a/src/gpu/gl/GrGLRenderTarget.cpp b/src/gpu/gl/GrGLRenderTarget.cpp
index cb9d310010b596fb7a90cf2d58b3064cca9cccbe..12e7d06d1d865629e4d01eccff5d93a32fd857fa 100644
--- a/src/gpu/gl/GrGLRenderTarget.cpp
+++ b/src/gpu/gl/GrGLRenderTarget.cpp
@@ -7,7 +7,9 @@
 
 #include "GrGLRenderTarget.h"
 
+#include "GrRenderTargetPriv.h"
 #include "GrGLGpu.h"
+#include "GrGLUtil.h"
 
 #define GPUGL static_cast<GrGLGpu*>(this->getGpu())
 #define GL_CALL(X) GR_GL_CALL(GPUGL->glInterface(), X)
@@ -60,6 +62,54 @@ size_t GrGLRenderTarget::onGpuMemorySize() const {
     return fGpuMemorySize;
 }
 
+bool GrGLRenderTarget::completeStencilAttachment() {
+    GrGLGpu* gpu = this->getGLGpu();
+    const GrGLInterface* interface = gpu->glInterface();
+    GrStencilAttachment* stencil = this->renderTargetPriv().getStencilAttachment();
+    if (nullptr == stencil) {
+        if (this->renderTargetPriv().getStencilAttachment()) {
+            GR_GL_CALL(interface, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
+                                                          GR_GL_STENCIL_ATTACHMENT,
+                                                          GR_GL_RENDERBUFFER, 0));
+            GR_GL_CALL(interface, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
+                                                          GR_GL_DEPTH_ATTACHMENT,
+                                                          GR_GL_RENDERBUFFER, 0));
+#ifdef SK_DEBUG
+            GrGLenum status;
+            GR_GL_CALL_RET(interface, status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
+            SkASSERT(GR_GL_FRAMEBUFFER_COMPLETE == status);
+#endif
+        }
+        return true;
+    } else {
+        const GrGLStencilAttachment* glStencil = static_cast<const GrGLStencilAttachment*>(stencil);
+        GrGLuint rb = glStencil->renderbufferID();
+
+        gpu->invalidateBoundRenderTarget();
+        gpu->stats()->incRenderTargetBinds();
+        GR_GL_CALL(interface, BindFramebuffer(GR_GL_FRAMEBUFFER, this->renderFBOID()));
+        GR_GL_CALL(interface, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
+                                                      GR_GL_STENCIL_ATTACHMENT,
+                                                      GR_GL_RENDERBUFFER, rb));
+        if (glStencil->format().fPacked) {
+            GR_GL_CALL(interface, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
+                                                          GR_GL_DEPTH_ATTACHMENT,
+                                                          GR_GL_RENDERBUFFER, rb));
+        } else {
+            GR_GL_CALL(interface, FramebufferRenderbuffer(GR_GL_FRAMEBUFFER,
+                                                          GR_GL_DEPTH_ATTACHMENT,
+                                                          GR_GL_RENDERBUFFER, 0));
+        }
+
+#ifdef SK_DEBUG
+        GrGLenum status;
+        GR_GL_CALL_RET(interface, status, CheckFramebufferStatus(GR_GL_FRAMEBUFFER));
+        SkASSERT(GR_GL_FRAMEBUFFER_COMPLETE == status);
+#endif
+        return true;
+    }
+}
+
 void GrGLRenderTarget::onRelease() {
     if (kBorrowed_LifeCycle != fRTLifecycle) {
         if (fTexFBOID) {
@@ -84,3 +134,9 @@ void GrGLRenderTarget::onAbandon() {
     fMSColorRenderbufferID  = 0;
     INHERITED::onAbandon();
 }
+
+GrGLGpu* GrGLRenderTarget::getGLGpu() const {
+    SkASSERT(!this->wasDestroyed());
+    return static_cast<GrGLGpu*>(this->getGpu());
+}
+