1 files changed, 33 insertions, 1 deletions
diff --git a/include/gpu/GrSurfaceContext.h b/include/gpu/GrSurfaceContext.h
index a05d37fed3..e1c799e3ae 100644
--- a/include/gpu/GrSurfaceContext.h
+++ b/include/gpu/GrSurfaceContext.h
@@ -8,6 +8,8 @@
 #ifndef GrSurfaceContext_DEFINED
 #define GrSurfaceContext_DEFINED
 
+#include "../private/GrSurfaceProxy.h"
+
 #include "SkRefCnt.h"
 
 class GrAuditTrail;
@@ -24,7 +26,30 @@ class SK_API GrSurfaceContext : public SkRefCnt {
 public:
     ~GrSurfaceContext() override {}
 
-    virtual bool copySurface(GrSurface* src, const SkIRect& srcRect, const SkIPoint& dstPoint) = 0;
+    /*
+     * Copy 'src' into the proxy backing this context
+     * @param src       src of pixels
+     * @param srcRect   the subset of 'src' to copy
+     * @param dstPoint  the origin of the 'srcRect' in the destination coordinate space
+     * @return          true if the copy succeeded; false otherwise
+     *
+     * Note: Notionally, 'srcRect' is clipped to 'src's extent with 'dstPoint' being adjusted.
+     *       Then the 'srcRect' offset by 'dstPoint' is clipped against the dst's extent.
+     *       The end result is only valid src pixels and dst pixels will be touched but the copied
+     *       regions will not be shifted.
+     */
+    bool copy(GrSurfaceProxy* src, const SkIRect& srcRect, const SkIPoint& dstPoint) {
+        return this->onCopy(src, srcRect, dstPoint);
+    }
+
+    bool copy(GrSurfaceProxy* src) {
+        return this->onCopy(src,
+                            SkIRect::MakeWH(src->width(), src->height()),
+                            SkIPoint::Make(0, 0));
+    }
+
+    // TODO: this is virtual b.c. this object doesn't have a pointer to the wrapped GrSurfaceProxy?
+    virtual GrSurfaceProxy* asDeferredSurface() = 0;
 
     GrAuditTrail* auditTrail() { return fAuditTrail; }
 
@@ -38,6 +63,13 @@ protected:
 
     // In debug builds we guard against improper thread handling
     SkDEBUGCODE(mutable GrSingleOwner* fSingleOwner;)
+
+private:
+    virtual bool onCopy(GrSurfaceProxy* src,
+                        const SkIRect& srcRect,
+                        const SkIPoint& dstPoint) = 0;
+
+    typedef SkRefCnt INHERITED;
 };
 
 #endif