add SkImageInfo to SkGrPixelRef constructor, to prep for larger CL

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 99 matching lines @@
 #else
     fSurface = NULL;
 #endif
     if (NULL == fSurface) {
         fSurface = surface;
     }
     fUnlock = transferCacheLock;
     SkSafeRef(surface);
 }
 
+SkGrPixelRef::SkGrPixelRef(const SkImageInfo&, GrSurface* surface, bool transferCacheLock) {
+    // TODO: figure out if this is responsible for Chrome canvas errors
+#if 0
+    // The GrTexture has a ref to the GrRenderTarget but not vice versa.
+    // If the GrTexture exists take a ref to that (rather than the render
+    // target)
+    fSurface = surface->asTexture();
+#else
+    fSurface = NULL;
+#endif
+    if (NULL == fSurface) {
+        fSurface = surface;
+    }
+    fUnlock = transferCacheLock;
+    SkSafeRef(surface);
+}
+
 SkGrPixelRef::~SkGrPixelRef() {
     if (fUnlock) {
         GrContext* context = fSurface->getContext();
         GrTexture* texture = fSurface->asTexture();
         if (NULL != context && NULL != texture) {
             context->unlockScratchTexture(texture);
         }
     }
     SkSafeUnref(fSurface);
 }
@@ skipping 40 matching lines @@
     if (!dst->allocPixels()) {
         SkDebugf("SkGrPixelRef::onReadPixels failed to alloc bitmap for result!\n");
         return false;
     }
     SkAutoLockPixels al(*dst);
     void* buffer = dst->getPixels();
     return fSurface->readPixels(left, top, width, height,
                                 kSkia8888_GrPixelConfig,
                                 buffer, dst->rowBytes());
 }