SkPDF/Bench: add bench for SkPDFCreateBitmapObject

bench/PDFBench.cpp

+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "Benchmark.h"
+#include "Resources.h"
+#include "SkImage.h"
+#include "SkPixmap.h"
+#include "SkData.h"
+
+#if SK_SUPPORT_PDF
+
+#include "SkPDFBitmap.h"
+
+namespace {
+struct NullWStream : public SkWStream {
+    NullWStream() : fN(0) {}
+    bool write(const void*, size_t n) override { fN += n; return true; }
+    size_t bytesWritten() const override { return fN; }
+    size_t fN;
+};
+
+static void test_pdf_image_serialization(SkImage* img) {
+    SkAutoTUnref<SkPDFObject> object(
+            SkPDFCreateBitmapObject(img, nullptr));
+    if (!object) {
+        SkDEBUGFAIL("");
+        return;
+    }
+    // SkDebugWStream wStream;
+    NullWStream wStream;
+    SkPDFSubstituteMap substitutes;
+    SkPDFObjNumMap objNumMap;
+    objNumMap.addObjectRecursively(object, substitutes);
+    for (int i = 0; i < objNumMap.objects().count(); ++i) {
+        SkPDFObject* object = objNumMap.objects()[i];
+        wStream.writeDecAsText(i + 1);
+        wStream.writeText(" 0 obj\n");
+        object->emitObject(&wStream, objNumMap, substitutes);
+        wStream.writeText("\nendobj\n");
+    }
+}
+
+class PDFImageBench : public Benchmark {
+public:
+    PDFImageBench() {}
+    virtual ~PDFImageBench() {}
+
+protected:
+    const char* onGetName() override { return "PDFImage"; }
+    bool isSuitableFor(Backend backend) override {
+        return backend == kNonRendering_Backend;
+    }
+    void onDelayedSetup() override {
+        SkAutoTUnref<SkImage> img(GetResourceAsImage("color_wheel.png"));
+        if (img) {
+            // force decoding, throw away reference to encoded data.
+            SkAutoPixmapStorage pixmap;
+            pixmap.alloc(SkImageInfo::MakeN32Premul(img->dimensions()));
+            if (img->readPixels(pixmap, 0, 0)) {
+                fImage.reset(SkImage::NewRasterCopy(
+                                     pixmap.info(), pixmap.addr(),
+                                     pixmap.rowBytes(), pixmap.ctable()));
+            }
+        }
+    }
+    void onDraw(int loops, SkCanvas*) override {
+        if (!fImage) {
+            return;
+        }
+        while (loops-- > 0) {
+            test_pdf_image_serialization(fImage);
+        }
+    }
+
+private:
+    SkAutoTUnref<SkImage> fImage;
+};
+
+class PDFJpegImageBench : public Benchmark {
+public:
+    PDFJpegImageBench() {}
+    virtual ~PDFJpegImageBench() {}
+
+protected:
+    const char* onGetName() override { return "PDFJpegImage"; }
+    bool isSuitableFor(Backend backend) override {
+        return backend == kNonRendering_Backend;
+    }
+    void onDelayedSetup() override {
+        SkAutoTUnref<SkImage> img(
+                GetResourceAsImage("mandrill_512_q075.jpg"));
+        if (!img) { return; }
+        SkAutoTUnref<SkData> encoded(img->refEncoded());
+        SkASSERT(encoded);
+        if (!encoded) { return; }
+        fImage.reset(img.release());
+    }
+    void onDraw(int loops, SkCanvas*) override {
+        if (!fImage) {
+            SkDEBUGFAIL("");
+            return;
+        }
+        while (loops-- > 0) {
+            test_pdf_image_serialization(fImage);
+        }
+    }
+
+private:
+    SkAutoTUnref<SkImage> fImage;
+};
+
+}  // namespace
+DEF_BENCH(return new PDFImageBench;)
+DEF_BENCH(return new PDFJpegImageBench;)
+
+#endif  // SK_SUPPORT_PDF