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 
13 class Image2RasterBench : public Benchmark {
14 public:
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 
23 protected:
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 
58 private:
59     SkString                fName;
60     sk_sp<SkImage>   fImage;
61     sk_sp<SkSurface> fRasterSurface;
62 
63     typedef Benchmark INHERITED;
64 };
65 DEF_BENCH( return new Image2RasterBench; )
66