gwenview/tests/imageloadbench.cpp

   1 #include <QBuffer>
   2 #include <QCoreApplication>
   3 #include <QDebug>
   4 #include <QFile>
   5 #include <QImage>
   6 #include <QImageReader>
   7 #include <QTime>
   8
   9 #include <lib/imageformats/imageformats.h>
  10
  11 const int ITERATIONS = 2;
  12 const QSize SCALED_SIZE(1280, 800);
  13
  14
  15 static void bench(QIODevice* device, const QString& outputName) {
  16         QTime chrono;
  17         chrono.start();
  18         for (int iteration=0; iteration<ITERATIONS; ++iteration) {
  19                 qDebug() << "Iteration:" << iteration;
  20
  21                 device->open(QIODevice::ReadOnly);
  22                 QImageReader reader(device);
  23                 QSize size = reader.size();
  24                 size.scale(SCALED_SIZE, Qt::KeepAspectRatio);
  25                 reader.setScaledSize(size);
  26                 QImage img = reader.read();
  27                 device->close();
  28
  29                 if (iteration == ITERATIONS - 1) {
  30                         qDebug() << "time:" << chrono.elapsed();
  31                         img.save(outputName, "png");
  32                 }
  33         }
  34 }
  35
  36
  37 int main(int argc, char** argv) {
  38         QCoreApplication app(argc, argv);
  39         if (argc != 2) {
  40                 qDebug() << "Usage: imageloadbench <file.jpg>";
  41                 return 1;
  42         }
  43
  44         QString fileName = QString::fromUtf8(argv[1]);
  45
  46         QFile file(fileName);
  47         if (!file.open(QIODevice::ReadOnly)) {
  48                 qDebug() << QString("Could not open '%1'").arg(fileName);
  49                 return 2;
  50         }
  51         QByteArray data = file.readAll();
  52         QBuffer buffer(&data);
  53
  54         qDebug() << "Using Qt loader";
  55         bench(&buffer, "qt.png");
  56         Gwenview::ImageFormats::registerPlugins();
  57         qDebug() << "Using Gwenview loader";
  58         bench(&buffer, "gv.png");
  59
  60         return 0;
  61 }