deferred canvas

dm/DMSrcSink.cpp

Index: dm/DMSrcSink.cpp
diff --git a/dm/DMSrcSink.cpp b/dm/DMSrcSink.cpp
index f0b10103f7494d17a97ccb4bbbdde447a8afaa61..bded66f1207ad16c092b7accc6630239e5dd64d0 100644
--- a/dm/DMSrcSink.cpp
+++ b/dm/DMSrcSink.cpp
@@ -15,6 +15,7 @@
 #include "SkColorSpaceXform.h"
 #include "SkCommonFlags.h"
 #include "SkData.h"
+#include "SkDeferredCanvas.h"
 #include "SkDocument.h"
 #include "SkError.h"
 #include "SkImageGenerator.h"
@@ -49,6 +50,8 @@ DEFINE_bool(multiPage, false, "For document-type backends, render the source"
             " into multiple pages");
 DEFINE_bool(RAW_threading, true, "Allow RAW decodes to run on multiple threads?");
 
+extern bool gUseDeferredCanvas;
+
 using sk_gpu_test::GrContextFactory;
 
 namespace DM {
@@ -1229,7 +1232,8 @@ Error RasterSink::draw(const Src& src, SkBitmap* dst, SkWStream*, SkString*) con
                      &factory,
                      nullptr/*colortable*/);
     SkCanvas canvas(*dst);
-    return src.draw(&canvas);
+    SkDeferredCanvas deferred(&canvas);
+    return src.draw(gUseDeferredCanvas ? &deferred : &canvas);

[mtklein, 2016/07/08 12:30:47]

We would normally hook this into DM differently.  ViaMatrix is probably the best
example to follow.

The upshot is, you can put a deferred canvas anywhere in the pipeline you like: 
--cofnig deferred-8888 is the same as --config 8888 --defer as you've written
it, but you will also be able to just run deferred-gpu, deferred-skp,
deferred-serialize-deferred-8888, .... whatever pipeline you like.

 }
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/