Make copySurface work for texture dsts, return a bool, & add unit test.

src/gpu/SkGrPixelRef.cpp

 
 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 
@@ skipping 65 matching lines @@
     }
     desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fConfig = SkImageInfo2GrPixelConfig(dstCT, kPremul_SkAlphaType, dstPT);
 
     GrTexture* dst = context->textureProvider()->createTexture(desc, false, nullptr, 0);
     if (nullptr == dst) {
         return nullptr;
     }
 
     // Blink is relying on the above copy being sent to GL immediately in the case when the source
-    // is a WebGL canvas backing store. We could have a TODO to remove this flush flag, but we have
+    // is a WebGL canvas backing store. We could have a TODO to remove this flush, but we have
     // a larger TODO to remove SkGrPixelRef entirely.
-    context->copySurface(dst->asRenderTarget(), texture, srcRect, SkIPoint::Make(0,0),
-                         GrContext::kFlushWrites_PixelOp);
+    context->copySurface(dst, texture, srcRect, SkIPoint::Make(0,0));
+    context->flushSurfaceWrites(dst);
 
     SkImageInfo info = SkImageInfo::Make(desc.fWidth, desc.fHeight, dstCT, kPremul_SkAlphaType,
                                          dstPT);
     SkGrPixelRef* pixelRef = new SkGrPixelRef(info, dst);
     SkSafeUnref(dst);
     return pixelRef;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
@@ skipping 104 matching lines @@
         cachedBitmap.setImmutable();
         //Add to the cache
         SkBitmapCache::Add(this, bounds, cachedBitmap);
 
         dst->swap(cachedBitmap);
     }
 
     return true;
 
 }