public CommandResult ProcessDensity(List <string> _inputs, String target, int dpi, bool compress)
{
var convert = _pathService.GetConvertPath();
var compressFlag = compress ? "+compress" : "";
var inputs = String.Join(" ", Quote(_inputs));
var command = $@"-density {dpi} -units PixelsPerInch {compressFlag} -adjoin {inputs} ""{target}""";
var workingDir = ".";
if (command.Length > CommandProcessor.MaxCommandLength)
{
var newInputs = _inputs.Select(x => new FileInfo(x).Name);
workingDir = new FileInfo(_inputs[0]).Directory.FullName;
inputs = String.Join(" ", Quote(newInputs));
command = $@"-density {dpi} -units PixelsPerInch {compressFlag} -adjoin {inputs} ""{target}""";
}
var fullCommand = String.Format("{0} {1}", convert, command);
var result = _processor.Process(convert, command, workingDir);
if (!result.Success)
{
_logger.LogError("process density failed {0}", result.Error);
return(result);
}
else
{
var file = new FileInfo(target);
if (result.Error.Length > 0)
{
return(new CommandResult {
Success = false
});
}
if (!file.Exists)
{
return(new CommandResult {
Success = false
});
}
if (file.Length == 0)
{
return(new CommandResult {
Success = false
});
}
}
return(new CommandResult {
Success = true
});
}
public async Task <List <String> > CompressImagesAsync(List <String> sources)
{
var convert = _pathService.GetConvertPath();
var max = 20;
var size = sources.Count();
var results = new List <string>();
var skip = 0;
while (skip < size)
{
var partailSource = sources.Skip(skip).Take(max);
var compressTask = CreateTask(partailSource, convert);
var rs = await Task.WhenAll(compressTask);
results.AddRange(rs);
skip = skip + max;
}
return(results.ToList());
}
