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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(SkCanvas::Config8888 config) {
     17         fUnPremulConfig = config;
     18         fName.printf("premul_and_unpremul_alpha_%s",
     19                      (config ==  SkCanvas::kRGBA_Unpremul_Config8888) ?
     20                      "RGBA8888" : "Native8888");
     21     }
     22 
     23 protected:
     24     virtual const char* onGetName() SK_OVERRIDE {
     25         return fName.c_str();
     26     }
     27 
     28     virtual void onDraw(const int loops, SkCanvas* canvas) SK_OVERRIDE {
     29         canvas->clear(SK_ColorBLACK);
     30         SkISize size = canvas->getDeviceSize();
     31 
     32         SkBitmap bmp1;
     33         bmp1.setConfig(SkBitmap::kARGB_8888_Config, size.width(),
     34                        size.height());
     35         bmp1.allocPixels();
     36         SkAutoLockPixels alp(bmp1);
     37         uint32_t* pixels = reinterpret_cast<uint32_t*>(bmp1.getPixels());
     38         for (int h = 0; h < size.height(); ++h) {
     39             for (int w = 0; w < size.width(); ++w)
     40                 pixels[h * size.width() + w] = SkPackConfig8888(fUnPremulConfig,
     41                     h & 0xFF, w & 0xFF, w & 0xFF, w & 0xFF);
     42         }
     43 
     44         SkBitmap bmp2;
     45         bmp2.setConfig(SkBitmap::kARGB_8888_Config, size.width(),
     46                        size.height());
     47 
     48         for (int loop = 0; loop < loops; ++loop) {
     49             // Unpremul -> Premul
     50             canvas->writePixels(bmp1, 0, 0, fUnPremulConfig);
     51             // Premul -> Unpremul
     52             canvas->readPixels(&bmp2, 0, 0, fUnPremulConfig);
     53         }
     54     }
     55 
     56 private:
     57     SkCanvas::Config8888 fUnPremulConfig;
     58     SkString fName;
     59     typedef SkBenchmark INHERITED;
     60 };
     61 
     62 
     63 DEF_BENCH(return new PremulAndUnpremulAlphaOpsBench(SkCanvas::kRGBA_Unpremul_Config8888));
     64 DEF_BENCH(return new PremulAndUnpremulAlphaOpsBench(SkCanvas::kNative_Unpremul_Config8888));
     65