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      1 
      2 /*
      3  * Copyright 2013 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 
      9 #include "SkBenchmark.h"
     10 #include "SkCanvas.h"
     11 #include "SkConfig8888.h"
     12 #include "SkString.h"
     13 
     14 class PremulAndUnpremulAlphaOpsBench : public SkBenchmark {
     15 public:
     16     PremulAndUnpremulAlphaOpsBench(void* param, SkCanvas::Config8888 config)
     17         : INHERITED(param) {
     18         fUnPremulConfig = config;
     19         fName.printf("premul_and_unpremul_alpha_%s",
     20                      (config ==  SkCanvas::kRGBA_Unpremul_Config8888) ?
     21                      "RGBA8888" : "Native8888");
     22     }
     23 
     24 protected:
     25     virtual const char* onGetName() SK_OVERRIDE {
     26         return fName.c_str();
     27     }
     28 
     29     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
     30         canvas->clear(SK_ColorBLACK);
     31         SkISize size = canvas->getDeviceSize();
     32 
     33         SkBitmap bmp1;
     34         bmp1.setConfig(SkBitmap::kARGB_8888_Config, size.width(),
     35                        size.height());
     36         bmp1.allocPixels();
     37         SkAutoLockPixels alp(bmp1);
     38         uint32_t* pixels = reinterpret_cast<uint32_t*>(bmp1.getPixels());
     39         for (int h = 0; h < size.height(); ++h) {
     40             for (int w = 0; w < size.width(); ++w)
     41                 pixels[h * size.width() + w] = SkPackConfig8888(fUnPremulConfig,
     42                     h & 0xFF, w & 0xFF, w & 0xFF, w & 0xFF);
     43         }
     44 
     45         SkBitmap bmp2;
     46         bmp2.setConfig(SkBitmap::kARGB_8888_Config, size.width(),
     47                        size.height());
     48 
     49         static const int kLoopCount = SkBENCHLOOP(10);
     50         for (int loop = 0; loop < kLoopCount; ++loop) {
     51             // Unpremul -> Premul
     52             canvas->writePixels(bmp1, 0, 0, fUnPremulConfig);
     53             // Premul -> Unpremul
     54             canvas->readPixels(&bmp2, 0, 0, fUnPremulConfig);
     55         }
     56     }
     57 
     58 private:
     59     SkCanvas::Config8888 fUnPremulConfig;
     60     SkString fName;
     61     typedef SkBenchmark INHERITED;
     62 };
     63 
     64 static SkBenchmark* fact0(void* p) {
     65     return new PremulAndUnpremulAlphaOpsBench(p,
     66         SkCanvas::kRGBA_Unpremul_Config8888);
     67 }
     68 static SkBenchmark* fact1(void* p) {
     69     return new PremulAndUnpremulAlphaOpsBench(p,
     70         SkCanvas::kNative_Unpremul_Config8888);
     71 }
     72 
     73 static BenchRegistry gReg0(fact0);
     74 static BenchRegistry gReg1(fact1);
     75