DM: add pdf

dm/DMPDFTask.cpp

+/*
+ * 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 "DMPDFTask.h"
+#include "DMExpectationsTask.h"
+#include "DMPDFRasterizeTask.h"
+#include "DMUtil.h"
+#include "DMWriteTask.h"
+#include "SkCommandLineFlags.h"
+#include "SkDocument.h"
+
+DEFINE_bool(pdf, true, "PDF backend master switch.");
+
+namespace DM {
+
+PDFTask::PDFTask(const char* suffix,
+                 Reporter* reporter,
+                 TaskRunner* taskRunner,
+                 const Expectations& expectations,
+                 skiagm::GMRegistry::Factory factory,
+                 RasterizePdfProc rasterizePdfProc)
+    : CpuTask(reporter, taskRunner)
+    , fGM(factory(NULL))
+    , fName(UnderJoin(fGM->getName(), suffix))
+    , fExpectations(expectations)
+    , fRasterize(rasterizePdfProc) {}
+
+namespace {
+
+class SinglePagePDF {
+public:
+    SinglePagePDF(SkScalar width, SkScalar height)
+        : fDocument(SkDocument::CreatePDF(&fWriteStream))
+        , fCanvas(fDocument->beginPage(width, height)) {}
+
+    SkCanvas* canvas() { return fCanvas; }
+
+    SkData* end() {
+        fCanvas->flush();
+        fDocument->endPage();
+        fDocument->close();
+        return fWriteStream.copyToData();
+    }
+
+private:
+    SkDynamicMemoryWStream fWriteStream;
+    SkAutoTUnref<SkDocument> fDocument;
+    SkCanvas* fCanvas;
+};
+
+}  // namespace
+
+void PDFTask::draw() {
+    SinglePagePDF pdf(fGM->width(), fGM->height());
+    //TODO(mtklein): GM doesn't do this.  Why not?
+    //pdf.canvas()->concat(fGM->getInitialTransform());
+    fGM->draw(pdf.canvas());
+
+    SkAutoTUnref<SkData> pdfData(pdf.end());
+    SkASSERT(pdfData.get());
+
+    if (!(fGM->getFlags() & skiagm::GM::kSkipPDFRasterization_Flag)) {
+        this->spawnChild(SkNEW_ARGS(PDFRasterizeTask,
+                                    (*this, pdfData.get(), fExpectations, fRasterize)));
+    }
+    this->spawnChild(SkNEW_ARGS(WriteTask, (*this, pdfData.get(), ".pdf")));
+}
+
+bool PDFTask::shouldSkip() const {
+    if (!FLAGS_pdf) {
+        return true;
+    }
+    if (fGM->getFlags() & skiagm::GM::kSkipPDF_Flag) {
+        return true;
+    }
+    return false;
+}
+
+}  // namespace DM