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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:
Image2RasterBench()15     Image2RasterBench() {
16         fName.set("native_image_to_raster_surface");
17     }
18 
isSuitableFor(Backend backend)19     bool isSuitableFor(Backend backend) override {
20         return kGPU_Backend == backend || kRaster_Backend == backend;
21     }
22 
23 protected:
onGetName()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     //
onPerCanvasPreDraw(SkCanvas * canvas)31     void onPerCanvasPreDraw(SkCanvas* canvas) override {
32         // create an Image reflecting the canvas (gpu or cpu)
33         SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
34         SkAutoTUnref<SkSurface> surface(canvas->newSurface(info));
35         canvas->drawColor(SK_ColorRED);
36         fImage.reset(surface->newImageSnapshot());
37 
38         // create a cpu-backed Surface
39         fRasterSurface.reset(SkSurface::NewRaster(info));
40     }
41 
onPerCanvasPostDraw(SkCanvas *)42     void onPerCanvasPostDraw(SkCanvas*) override {
43         // Release the image and raster surface here to prevent out of order destruction
44         // between these and the gpu interface.
45         fRasterSurface.reset(nullptr);
46         fImage.reset(nullptr);
47     }
48 
onDraw(int loops,SkCanvas *)49     void onDraw(int loops, SkCanvas*) override {
50         for (int i = 0; i < loops; i++) {
51             for (int inner = 0; inner < 10; ++inner) {
52                 fRasterSurface->getCanvas()->drawImage(fImage, 0, 0);
53             }
54         }
55     }
56 
57 private:
58     SkString                fName;
59     SkAutoTUnref<SkImage>   fImage;
60     SkAutoTUnref<SkSurface> fRasterSurface;
61 
62     typedef Benchmark INHERITED;
63 };
64 DEF_BENCH( return new Image2RasterBench; )
65