private Image GenerateThumb(ImageModel img)
{
if (!File.Exists(img.fileUri))
return null;
string ext = Path.GetExtension(img.fileUri);
Image image = Image.FromFile(img.fileUri, true);
int height = (int)(image.Height / (image.Width/282f)), width = 282;
var destRect = new Rectangle(0, 0, width, height);
var destImage = new Bitmap(width, height);
destImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);
using (var graphics = Graphics.FromImage(destImage))
{
graphics.CompositingMode = CompositingMode.SourceCopy;
graphics.CompositingQuality = CompositingQuality.HighSpeed;
graphics.InterpolationMode = InterpolationMode.Default;
graphics.SmoothingMode = SmoothingMode.HighSpeed;
graphics.PixelOffsetMode = PixelOffsetMode.HighSpeed;
using (var wrapMode = new ImageAttributes())
{
wrapMode.SetWrapMode(WrapMode.TileFlipXY);
graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, wrapMode);
}
}
destImage.Save($"{RinDB.THUMB_DIR}/{img.id}{ext}", (ext == ".gif") ? ImageFormat.Gif : ImageFormat.Png);
return destImage;
}
private Response GetOrGenerateThumb(ImageModel image)
{
string ext = Path.GetExtension(image.fileUri);
if(!File.Exists($"{RinDB.BASE_DIR}/RinDB/thumbs/{image.id}{ext}"))
{
if (!Directory.Exists(RinDB.THUMB_DIR))
Directory.CreateDirectory(RinDB.THUMB_DIR);
return Response.FromImage(GenerateThumb(image), (ext == ".gif") ? "image/gif" : "image/png");
}
return Response.FromImage(Image.FromFile($"{RinDB.THUMB_DIR}/{image.id}{ext}", true), (ext == ".gif") ? "image/gif" : "image/png");
}