DM: add pdf

dm/DMPDFRasterizeTask.cpp

Index: dm/DMPDFRasterizeTask.cpp
diff --git a/dm/DMPDFRasterizeTask.cpp b/dm/DMPDFRasterizeTask.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..ce6c10982fb503304d0ff8912ab01449aa8bf6b5
--- /dev/null
+++ b/dm/DMPDFRasterizeTask.cpp
@@ -0,0 +1,41 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "DMPDFRasterizeTask.h"
+#include "DMExpectationsTask.h"
+#include "DMUtil.h"
+#include "DMWriteTask.h"
+#include "SkBitmap.h"
+#include "SkCanvas.h"
+#include "SkStream.h"
+
+namespace DM {
+
+PDFRasterizeTask::PDFRasterizeTask(const Task& parent,
+                                   SkData* pdf,
+                                   const Expectations& expectations,
+                                   RasterizePdfProc proc)
+    : CpuTask(parent)
+    , fName(UnderJoin(parent.name().c_str(), "rasterize"))
+    , fPdf(SkRef(pdf))
+    , fExpectations(expectations)
+    , fRasterize(proc) {}
+
+void PDFRasterizeTask::draw() {
+    SkMemoryStream pdfStream(fPdf.get());
+    SkBitmap bitmap;
+
+    if (!fRasterize(&pdfStream, &bitmap)) {
+        this->fail();
+    }
+    if (!fExpectations.check(*this, bitmap)) {
+        this->fail();
+        this->spawnChild(SkNEW_ARGS(WriteTask, (*this, bitmap)));
+    }
+}
+
+}  // namespace DM