src/third_party/skia/bench/ImageDecodeBench.cpp

   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 "SkBitmap.h"
  10 #include "SkData.h"
  11 #include "SkForceLinking.h"
  12 #include "SkImageDecoder.h"
  13 #include "SkOSFile.h"
  14 #include "SkStream.h"
  15 #include "SkString.h"
  16
  17 __SK_FORCE_IMAGE_DECODER_LINKING;
  18
  19 class SkCanvas;
  20
  21 class ImageDecodeBench : public Benchmark {
  22 public:
  23     ImageDecodeBench(void* p, const char* filename)
  24     : fName("image_decode_")
  25     , fFilename(filename)
  26     , fStream()
  27     , fValid(false) {
  28         fName.append(SkOSPath::Basename(filename));
  29     }
  30
  31     virtual bool isSuitableFor(Backend backend) SK_OVERRIDE {
  32         return backend == kNonRendering_Backend;
  33     }
  34
  35 protected:
  36     virtual const char* onGetName() SK_OVERRIDE {
  37         return fName.c_str();
  38     }
  39
  40     virtual void onPreDraw() SK_OVERRIDE {
  41         SkFILEStream fileStream(fFilename.c_str());
  42         fValid = fileStream.isValid() && fileStream.getLength() > 0;
  43         if (fValid) {
  44             const size_t size = fileStream.getLength();
  45             void* data = sk_malloc_throw(size);
  46             if (fileStream.read(data, size) < size) {
  47                 fValid = false;
  48             } else {
  49                 SkAutoTUnref<SkData> skdata(SkData::NewFromMalloc(data, size));
  50                 fStream.setData(skdata.get());
  51             }
  52         }
  53     }
  54
  55     virtual void onDraw(const int loops, SkCanvas*) SK_OVERRIDE {
  56 #ifdef SK_DEBUG
  57         if (!fValid) {
  58             SkDebugf("stream was invalid: %s\n", fName.c_str());
  59             return;
  60         }
  61 #endif
  62         // Decode a bunch of times
  63         SkBitmap bm;
  64         for (int i = 0; i < loops; ++i) {
  65             SkDEBUGCODE(bool success =) SkImageDecoder::DecodeStream(&fStream, &bm);
  66 #ifdef SK_DEBUG
  67             if (!success) {
  68                 SkDebugf("failed to decode %s\n", fName.c_str());
  69                 return;
  70             }
  71 #endif
  72             SkDEBUGCODE(success =) fStream.rewind();
  73 #ifdef SK_DEBUG
  74             if (!success) {
  75                 SkDebugf("failed to rewind %s\n", fName.c_str());
  76                 return;
  77             }
  78 #endif
  79         }
  80     }
  81
  82 private:
  83     SkString        fName;
  84     const SkString  fFilename;
  85     SkMemoryStream  fStream;
  86     bool            fValid;
  87
  88     typedef Benchmark INHERITED;
  89 };
  90
  91 // These are files which call decodePalette
  92 //DEF_BENCH( return SkNEW_ARGS(ImageDecodeBench, ("/usr/local/google/home/scroggo/Downloads/images/hal_163x90.png")); )
  93 //DEF_BENCH( return SkNEW_ARGS(ImageDecodeBench, ("/usr/local/google/home/scroggo/Downloads/images/box_19_top-left.png")); )