1/*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "Benchmark.h"
9#include "SkCanvas.h"
10#include "SkImage.h"
11#include "SkSurface.h"
12
13class Image2RasterBench : public Benchmark {
14public:
15    Image2RasterBench() {
16        fName.set("native_image_to_raster_surface");
17    }
18
19    bool isSuitableFor(Backend backend) override {
20        return kGPU_Backend == backend || kRaster_Backend == backend;
21    }
22
23protected:
24    const char* onGetName() override {
25        return fName.c_str();
26    }
27
28    // We explicitly want to bench drawing a Image [cpu or gpu backed] into a raster target,
29    // to ensure that we can cache the read-back in the case of gpu -> raster
30    //
31    void onPerCanvasPreDraw(SkCanvas* canvas) override {
32        // create an Image reflecting the canvas (gpu or cpu)
33        SkImageInfo info = canvas->imageInfo().makeWH(100, 100);
34        auto surface(canvas->makeSurface(info));
35        canvas->drawColor(SK_ColorRED);
36        fImage = surface->makeImageSnapshot();
37
38        // create a cpu-backed Surface
39        SkImageInfo n32Info = SkImageInfo::MakeN32Premul(100, 100);
40        fRasterSurface = SkSurface::MakeRaster(n32Info);
41    }
42
43    void onPerCanvasPostDraw(SkCanvas*) override {
44        // Release the image and raster surface here to prevent out of order destruction
45        // between these and the gpu interface.
46        fRasterSurface.reset(nullptr);
47        fImage.reset(nullptr);
48    }
49
50    void onDraw(int loops, SkCanvas*) override {
51        for (int i = 0; i < loops; i++) {
52            for (int inner = 0; inner < 10; ++inner) {
53                fRasterSurface->getCanvas()->drawImage(fImage.get(), 0, 0);
54            }
55        }
56    }
57
58private:
59    SkString                fName;
60    sk_sp<SkImage>   fImage;
61    sk_sp<SkSurface> fRasterSurface;
62
63    typedef Benchmark INHERITED;
64};
65DEF_BENCH( return new Image2RasterBench; )
66