public static void MakeThumbnail(string path, ref string outputPath)
{
if (!File.Exists(Properties.Settings.Default.UtilitiesDirectory + "gdal_translate.exe"))
{
MessageBox.Show("В папке с утилитами отсутствует утилита gdal_translate.", "Ошибка!",
MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
try
{
/* -------------------------------------------------------------------- */
/* Register driver(s). */
/* -------------------------------------------------------------------- */
GdalConfiguration.ConfigureGdal();
//Gdal.AllRegister();
/* -------------------------------------------------------------------- */
/* Open dataset. */
/* -------------------------------------------------------------------- */
Dataset ds = Gdal.Open(path, Access.GA_ReadOnly);
if (ds == null)
{
Console.WriteLine("Can't open " + path);
return;
//System.Environment.Exit(-1);
}
Console.WriteLine("Raster dataset parameters:");
Console.WriteLine(" Projection: " + ds.GetProjectionRef());
Console.WriteLine(" RasterCount: " + ds.RasterCount);
Console.WriteLine(" RasterSize (" + ds.RasterXSize + "," + ds.RasterYSize + ")");
/* -------------------------------------------------------------------- */
/* Get driver */
/* -------------------------------------------------------------------- */
Driver drv = ds.GetDriver();
if (drv == null)
{
Console.WriteLine("Can't get driver.");
return;
//System.Environment.Exit(-1);
}
Console.WriteLine("Using driver " + drv.LongName);
string m_Gdal_Translate_Arguments = String.Empty;
Band band = ds.GetRasterBand(1);
if (band.DataType == DataType.GDT_Byte || drv == Gdal.GetDriverByName("JPEG"))
{
m_Gdal_Translate_Arguments = "-of JPEG -co \"QUALITY=50\" ";
outputPath = Path.ChangeExtension(outputPath, "jpg");
}
else
{
m_Gdal_Translate_Arguments = "-of GTiff -co \"COMPRESS = DEFLATE\" -co \"ZLEVEL = 9\" ";
outputPath = Path.ChangeExtension(outputPath, "tif");
}
// Get the width and height of the Dataset
int width = band.XSize;
int height = band.YSize;
float scaleCoeff = 1;
float maxSize = 256;
scaleCoeff = width > height ? maxSize / (float)width : maxSize / (float)height;
int newWidth = (int)((float)width * scaleCoeff);
int newHeight = (int)((float)height * scaleCoeff);
m_Gdal_Translate_Arguments +=
String.Format("-outsize {0} {1} \"{2}\" \"{3}\"", newWidth, newHeight, path, outputPath);
//UseGdalTranslate(path, outputPath, newWidth, newHeight);
UseGdalTranslate(m_Gdal_Translate_Arguments);
}
catch (Exception e)
{
Console.WriteLine("Application error: " + e.Message);
outputPath = String.Empty;
}
}