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: PremulAndUnpremulAlphaOpsBench(SkCanvas::Config8888 config)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: onGetName()24 virtual const char* onGetName() SK_OVERRIDE { 25 return fName.c_str(); 26 } 27 onDraw(const int loops,SkCanvas * canvas)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