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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:
     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