SVG backend in DM

Not enabled by default, but this should get you SKPs, GMs etc for free to play with.

$ out/Debug/dm -w svgs --src gm skp --config svg

BUG=skia:

Review URL: https://codereview.chromium.org/892693002

3 files changed, 23 insertions, 1 deletions

diff --git a/dm/DM.cpp b/dm/DM.cpp
index f087a327af..c8d1ec7f67 100644
--- a/dm/DM.cpp
+++ b/dm/DM.cpp
@@ -221,7 +221,8 @@ static Sink* create_sink(const char* tag) {
         SINK("8888", RasterSink, kN32_SkColorType);
         SINK("pdf",  PDFSink);
         SINK("skp",  SKPSink);
-        SINK("null",  NullSink);
+        SINK("svg",  SVGSink);
+        SINK("null", NullSink);
     }
 #undef SINK
     return NULL;
diff --git a/dm/DMSrcSink.cpp b/dm/DMSrcSink.cpp
index f3ed574d89..baf1871ba3 100644
--- a/dm/DMSrcSink.cpp
+++ b/dm/DMSrcSink.cpp
@@ -6,6 +6,7 @@
 #include "SkOSFile.h"
 #include "SkPictureRecorder.h"
 #include "SkRandom.h"
+#include "SkSVGDevice.h"
 #include "SkStream.h"
 
 namespace DM {
@@ -227,6 +228,16 @@ Error SKPSink::draw(const Src& src, SkBitmap*, SkWStream* dst) const {
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
+SVGSink::SVGSink() {}
+
+Error SVGSink::draw(const Src& src, SkBitmap*, SkWStream* dst) const {
+    SkAutoTUnref<SkBaseDevice> device(SkSVGDevice::Create(src.size(), dst));
+    SkCanvas canvas(device);
+    return src.draw(&canvas);
+}
+
+/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+
 RasterSink::RasterSink(SkColorType colorType) : fColorType(colorType) {}
 
 Error RasterSink::draw(const Src& src, SkBitmap* dst, SkWStream*) const {
diff --git a/dm/DMSrcSink.h b/dm/DMSrcSink.h
index bf8e7d6810..1fdc9ed927 100644
--- a/dm/DMSrcSink.h
+++ b/dm/DMSrcSink.h
@@ -130,6 +130,16 @@ public:
     const char* fileExtension() const SK_OVERRIDE { return "skp"; }
 };
 
+class SVGSink : public Sink {
+public:
+    SVGSink();
+
+    Error draw(const Src&, SkBitmap*, SkWStream*) const SK_OVERRIDE;
+    int enclave() const SK_OVERRIDE { return kAnyThread_Enclave; }
+    const char* fileExtension() const SK_OVERRIDE { return "svg"; }
+};
+
+
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
 class ViaMatrix : public Sink {