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      1 /*
      2  * Copyright 2013 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 "SkString.h"
     11 #include "sk_tool_utils.h"
     12 
     13 class PremulAndUnpremulAlphaOpsBench : public Benchmark {
     14     enum {
     15         W = 256,
     16         H = 256,
     17     };
     18     SkBitmap fBmp1, fBmp2;
     19 
     20 public:
     21     PremulAndUnpremulAlphaOpsBench(SkColorType ct) {
     22         fColorType = ct;
     23         fName.printf("premul_and_unpremul_alpha_%s", sk_tool_utils::colortype_name(ct));
     24     }
     25 
     26 protected:
     27     const char* onGetName() override {
     28         return fName.c_str();
     29     }
     30 
     31     void onDelayedSetup() override {
     32         SkImageInfo info = SkImageInfo::Make(W, H, fColorType, kUnpremul_SkAlphaType);
     33         fBmp1.allocPixels(info);   // used in writePixels
     34 
     35         for (int h = 0; h < H; ++h) {
     36             for (int w = 0; w < W; ++w) {
     37                 // SkColor places A in the right slot for either RGBA or BGRA
     38                 *fBmp1.getAddr32(w, h) = SkColorSetARGB(h & 0xFF, w & 0xFF, w & 0xFF, w & 0xFF);
     39             }
     40         }
     41 
     42         fBmp2.allocPixels(info);    // used in readPixels()
     43     }
     44 
     45     void onDraw(int loops, SkCanvas* canvas) override {
     46         canvas->clear(SK_ColorBLACK);
     47 
     48         for (int loop = 0; loop < loops; ++loop) {
     49             // Unpremul -> Premul
     50             canvas->writePixels(fBmp1.info(), fBmp1.getPixels(), fBmp1.rowBytes(), 0, 0);
     51             // Premul -> Unpremul
     52             canvas->readPixels(fBmp2.info(), fBmp2.getPixels(), fBmp2.rowBytes(), 0, 0);
     53         }
     54     }
     55 
     56 private:
     57     SkColorType fColorType;
     58     SkString fName;
     59 
     60     typedef Benchmark INHERITED;
     61 };
     62 
     63 
     64 DEF_BENCH(return new PremulAndUnpremulAlphaOpsBench(kRGBA_8888_SkColorType));
     65 DEF_BENCH(return new PremulAndUnpremulAlphaOpsBench(kBGRA_8888_SkColorType));
     66