Don't flush on copyTexture, take 2

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 35 matching lines @@
 void SkROLockPixelsPixelRef::onUnlockPixels() {
     fBitmap.unlockPixels();
 }
 
 bool SkROLockPixelsPixelRef::onLockPixelsAreWritable() const {
     return false;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
-static SkGrPixelRef* copyToTexturePixelRef(GrTexture* texture, SkColorType dstCT,
-                                           const SkIRect* subset) {
+static SkGrPixelRef* copy_to_new_texture_pixelref(GrTexture* texture, SkColorType dstCT,
+                                                  const SkIRect* subset) {
     if (NULL == texture || kUnknown_SkColorType == dstCT) {
         return NULL;
     }
     GrContext* context = texture->getContext();
     if (NULL == context) {
         return NULL;
     }
     GrTextureDesc desc;
 
     SkIPoint pointStorage;
@@ skipping 13 matching lines @@
     desc.fFlags = kRenderTarget_GrTextureFlagBit | kNoStencil_GrTextureFlagBit;
     desc.fConfig = SkImageInfo2GrPixelConfig(dstCT, kPremul_SkAlphaType);
 
     GrTexture* dst = context->createUncachedTexture(desc, NULL, 0);
     if (NULL == dst) {
         return NULL;
     }
 
     context->copyTexture(texture, dst->asRenderTarget(), topLeft);
 
-    // TODO: figure out if this is responsible for Chrome canvas errors
-#if 0
-    // The render texture we have created (to perform the copy) isn't fully
-    // functional (since it doesn't have a stencil buffer). Release it here
-    // so the caller doesn't try to render to it.
-    // TODO: we can undo this release when dynamic stencil buffer attach/
-    // detach has been implemented
-    dst->releaseRenderTarget();
-#endif
+    // 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, but we have a
+    // larger TODO to remove SkGrPixelRef entirely.
+    context->flush();
 
     SkImageInfo info = SkImageInfo::Make(desc.fWidth, desc.fHeight, dstCT, kPremul_SkAlphaType);
     SkGrPixelRef* pixelRef = SkNEW_ARGS(SkGrPixelRef, (info, dst));
     SkSafeUnref(dst);
     return pixelRef;
 }
 
 ///////////////////////////////////////////////////////////////////////////////
 
 SkGrPixelRef::SkGrPixelRef(const SkImageInfo& info, GrSurface* surface,
@@ skipping 94 matching lines @@
         cachedBitmap.setImmutable();
         //Add to the cache
         SkBitmapCache::Add(this->getGenerationID(), bounds, cachedBitmap);
 
         dst->swap(cachedBitmap);
     }
 
     return true;
 
 }