Fixing a deferred canvas optimization that purges pending draws when the canvas is cleared

It appears that the recording canvas returns a save count of 1 when the save stack is empty.
In order to pass Canvas unit tests when a clear occurs, changes to SkGPipe were necessary
to allow SkDeferredCanvas to set the device bounds on the SkGPipeCanvas.  A positive
side effect of this change is that graphics primitives that fall outside of the device
bounds will now always be culled at the recording stage (as opposed playback).

BUG=http://code.google.com/p/skia/issues/detail?id=782
TEST=deferred_canvas_record bench test
Review URL: https://codereview.appspot.com/6454157

git-svn-id: http://skia.googlecode.com/svn/trunk@5117 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 7 insertions, 1 deletions

diff --git a/include/pipe/SkGPipe.h b/include/pipe/SkGPipe.h
index 40ab30af7c..bbe504aee6 100644
--- a/include/pipe/SkGPipe.h
+++ b/include/pipe/SkGPipe.h
@@ -103,7 +103,9 @@ public:
         kSharedAddressSpace_Flag        = 1 << 1
     };
 
-    SkCanvas* startRecording(SkGPipeController*, uint32_t flags = 0);
+    SkCanvas* startRecording(SkGPipeController*, uint32_t flags = 0,
+        uint32_t width = kDefaultRecordingCanvasSize,
+        uint32_t height = kDefaultRecordingCanvasSize);
 
     // called in destructor, but can be called sooner once you know there
     // should be no more drawing calls made into the recording canvas.
@@ -136,6 +138,10 @@ public:
     size_t freeMemoryIfPossible(size_t bytesToFree);
 
 private:
+    enum {
+        kDefaultRecordingCanvasSize = 32767,
+    };
+
     SkGPipeCanvas* fCanvas;
     SkWriter32     fWriter;
 };