Dynamically create stencil buffer when needed.

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 59 matching lines @@
         desc.fWidth  = texture->width();
         desc.fHeight = texture->height();
         srcRect = SkIRect::MakeWH(texture->width(), texture->height());
     } else {
         SkASSERT(SkIRect::MakeWH(texture->width(), texture->height()).contains(*subset));
         // Create a new texture that is the size of subset.
         desc.fWidth = subset->width();
         desc.fHeight = subset->height();
         srcRect = *subset;
     }
-    desc.fFlags = kRenderTarget_GrSurfaceFlag | kNoStencil_GrSurfaceFlag;
+    desc.fFlags = kRenderTarget_GrSurfaceFlag;
     desc.fConfig = SkImageInfo2GrPixelConfig(dstCT, kPremul_SkAlphaType, dstPT);
 
     GrTexture* dst = context->createTexture(desc, false, NULL, 0);
     if (NULL == dst) {
         return NULL;
     }
 
     // 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
     // a larger TODO to remove SkGrPixelRef entirely.
@@ skipping 99 matching lines @@
         cachedBitmap.setImmutable();
         //Add to the cache
         SkBitmapCache::Add(this->getGenerationID(), bounds, cachedBitmap);
 
         dst->swap(cachedBitmap);
     }
 
     return true;
 
 }