DM testing for skipping and scaling

dm/DMSrcSink.h

Index: dm/DMSrcSink.h
diff --git a/dm/DMSrcSink.h b/dm/DMSrcSink.h
index bd8c41ee186593dff1a58677b0be1e3a33e22be6..6b269ddb1254bf9b66b46ad21e1d48259dc9f854 100644
--- a/dm/DMSrcSink.h
+++ b/dm/DMSrcSink.h
@@ -98,13 +98,14 @@ public:
         kNormal_Mode,
         kScanline_Mode,
         kScanline_Subset_Mode,
+        kScale_Mode,
     };
     enum DstColorType {
         kGetFromCanvas_DstColorType,
         kIndex8_Always_DstColorType,
         kGrayscale_Always_DstColorType,
     };
-    CodecSrc(Path, Mode, DstColorType);
+    CodecSrc(Path, Mode, DstColorType, float);

[scroggo, 2015/06/11 15:50:02]

Maybe we should introduce a separate constructor for kScale_Mode:

CodecSrc(Path, DstColorType, float);

Since we always use 1.0f when not using kScale_Mode.

[msarett, 2015/06/11 19:29:36]

Agreed, however, now all of the modes use a scale, so this constructor makes
sense.

 
     Error draw(SkCanvas*) const override;
     SkISize size() const override;
@@ -113,6 +114,7 @@ private:
     Path                   fPath;
     Mode                   fMode;
     DstColorType           fDstColorType;
+    float                  fScale;
 };