SkMojo: test linking Skia against the Mojo SDK

dm/DMSrcSink.cpp

Index: dm/DMSrcSink.cpp
diff --git a/dm/DMSrcSink.cpp b/dm/DMSrcSink.cpp
index 29886807a7117b412ddce12102d6433e7dc289cd..1fb9a393d22385daffd2c88827863d4115645cae 100644
--- a/dm/DMSrcSink.cpp
+++ b/dm/DMSrcSink.cpp
@@ -31,6 +31,10 @@
 #include "SkSwizzler.h"
 #include <functional>
 
+#ifdef SK_MOJO
+    #include "SkMojo.mojom.h"
+#endif
+
 DEFINE_bool(multiPage, false, "For document-type backends, render the source"
             " into multiple pages");
 
@@ -1233,6 +1237,55 @@ Error ViaTwice::draw(const Src& src, SkBitmap* bitmap, SkWStream* stream, SkStri
 
 /*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
 
+#ifdef SK_MOJO
+    Error ViaMojo::draw(const Src& src, SkBitmap* bitmap, SkWStream* stream, SkString* log) const {
+        SkPictureRecorder recorder;
+        SkRect size = SkRect::Make(SkIRect::MakeSize(src.size()));
+        Error err = src.draw(recorder.beginRecording(size));
+        if (!err.isEmpty()) {
+            return err;
+        }
+        SkAutoTUnref<SkPicture> skPicture(recorder.endRecording());
+
+        SkASSERT(skPicture);
+        SkDynamicMemoryWStream buffer;
+        skPicture->serialize(&buffer);
+        skPicture.reset();
+        SkMojo::FlattenedPicturePtr mojoPicture = SkMojo::FlattenedPicture::New();

[mtklein, 2016/01/29 18:51:54]

Just curious, is this a typedef for something like 
std::unique_ptr<SkMojo::FlattenedPicture> ?

+        mojoPicture->data.resize(buffer.bytesWritten());
+        buffer.copyTo(mojoPicture->data.data());
+        buffer.reset();
+        SkASSERT(mojoPicture.get() && mojoPicture->data);
+
+        size_t flatSize = mojoPicture->GetSerializedSize();
+        SkAutoMalloc storage(flatSize);
+        if (!mojoPicture->Serialize(storage.get(), flatSize)) {
+            return "SkMojo::FlattenedPicture::Serialize failed";
+        }
+        mojoPicture = SkMojo::FlattenedPicture::New();
+        mojoPicture->Deserialize(storage.get());
+        storage.free();
+        if (!mojoPicture) {
+            return "SkMojo::FlattenedPicture::Deserialize failed";
+        }
+        SkMemoryStream tmpStream(mojoPicture->data.data(),
+                                 mojoPicture->data.size());
+        skPicture.reset(SkPicture::CreateFromStream(&tmpStream));
+        mojoPicture.reset();
+        auto fn = [&](SkCanvas* canvas) -> Error {
+            canvas->drawPicture(skPicture.get());
+            return check_against_reference(bitmap, src, fSink);
+        };
+        return draw_to_canvas(fSink, bitmap, stream, log, src.size(), fn);
+    }
+#else // not SK_MOJO

[mtklein, 2016/01/29 18:51:54]

This comment is probably no longer useful.

+    Error ViaMojo::draw(const Src&, SkBitmap*, SkWStream*, SkString*) const {
+        return "Mojo is missing!";
+    }
+#endif
+
+/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+
 // This is like SkRecords::Draw, in that it plays back SkRecords ops into a Canvas.
 // Unlike SkRecords::Draw, it builds a single-op sub-picture out of each Draw-type op.
 // This is an only-slightly-exaggerated simluation of Blink's Slimming Paint pictures.