Enable stencil clipping in mixed sampled render targets

src/gpu/GrRenderTargetPriv.h

Index: src/gpu/GrRenderTargetPriv.h
diff --git a/src/gpu/GrRenderTargetPriv.h b/src/gpu/GrRenderTargetPriv.h
index f4931db1db7475feab36d24f163aeec8b4bc0f7e..115dc530a882e6dcb0c0feddaf34317476c106bc 100644
--- a/src/gpu/GrRenderTargetPriv.h
+++ b/src/gpu/GrRenderTargetPriv.h
@@ -27,6 +27,32 @@ public:
      */
     bool attachStencilAttachment(GrStencilAttachment* stencil);
 
+    /**
+     * Some hardware allows overriding the default multisampling pattern with user-defined sample
+     * locations. Returns true if the render target has been configured to use programmable sample
+     * locations. */
+    bool programmableSampleLocationsEnabled() { return fRenderTarget->fProgrammableSampleLocationsEnabled; }
+
+    /** Mark render target as being configured to use programmable sample locations, or otherwise. */
+    void setProgrammableSampleLocationsEnabled(bool enabled) {
+        fRenderTarget->fProgrammableSampleLocationsEnabled = enabled;
+    }
+
+    /**
+     * @return true if centered sample locations have been set for this
+     *         render target.  Requires support for NV_sample_locations.
+     */
+    bool usesCenteredSampleLocations() const {
+        return fRenderTarget->fUsesCenteredSampleLocations;
+    }
+
+    /**
+     * Flag render target as using or not using programmable sample locations.
+     */
+    void flagAsUsingCenteredSampleLocations(bool useCenteredSampleLocations) {
+        fRenderTarget->fUsesCenteredSampleLocations = useCenteredSampleLocations;
+    }
+
 private:
     explicit GrRenderTargetPriv(GrRenderTarget* renderTarget) : fRenderTarget(renderTarget) {}
     GrRenderTargetPriv(const GrRenderTargetPriv&) {} // unimpl