private static async Task <Image> MergeImagesInternalAsync(List <string> imageUrls, MergeLayoutEnum mergeLayout, Size size)
{
int picCount = 0;
var stringLayout = mergeLayout.ToString();
if (stringLayout.StartsWith("Merge1C"))
{
picCount = 1;
}
else if (stringLayout.StartsWith("Merge2"))
{
picCount = 2;
}
else if (stringLayout.StartsWith("Merge3"))
{
picCount = 3;
}
else if (stringLayout.StartsWith("Merge4"))
{
picCount = 4;
}
else if (stringLayout.StartsWith("Merge8"))
{
picCount = 8;
}
if (imageUrls.Count < picCount)
{
throw new ArgumentException("argument invalid.");
}
List <Image> list = new List <Image>(picCount);
for (int i = 0; i < picCount; i++)
{
var bytes = await GetImageByteArrayAsync(imageUrls[i]);
if (bytes != null && bytes.Length > 0)
{
list.Add(ConvertToImage(bytes));
}
}
var result = MergeImages(list, size, mergeLayout);
return(result);
}
private static async Task TestMerge(string type, List <string> imagePath, MergeLayoutEnum layout, Size size)
{
var m1 = await ImageMergeHelper.MergeImagesAsync(imagePath, layout, size);
var m1Path = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, type + "-" + layout.ToString() + ".png");
if (File.Exists(m1Path))
{
File.Delete(m1Path);
}
m1.Save(m1Path);
}
