internal static Image ResizeImage(Image image, int width, int height,
ThumbnailMakerBorder border)
{
var nw = (float)image.Width;
var nh = (float)image.Height;
if (nw > width)
{
nh = width * nh / nw;
nw = width;
}
if (nh > height)
{
nw = height * nw / nh;
nh = height;
}
var result = new Bitmap(
border == ThumbnailMakerBorder.Bordered ? width : (int)nw,
border == ThumbnailMakerBorder.Bordered ? height : (int)nh
);
try {
try {
result.SetResolution(image.HorizontalResolution, image.VerticalResolution);
}
catch (Exception ex) {
LogManager.GetLogger(typeof(ThumbnailMaker)).Debug("Failed to set resolution", ex);
}
using (var graphics = Graphics.FromImage(result)) {
if (result.Width > image.Width && result.Height > image.Height)
{
graphics.CompositingQuality =
Drawing2D.CompositingQuality.HighQuality;
graphics.InterpolationMode =
Drawing2D.InterpolationMode.High;
}
else
{
graphics.CompositingQuality =
Drawing2D.CompositingQuality.HighSpeed;
graphics.InterpolationMode = Drawing2D.InterpolationMode.Bicubic;
}
var rect = new Rectangle(
(int)(result.Width - nw) / 2,
(int)(result.Height - nh) / 2,
(int)nw, (int)nh
);
graphics.SmoothingMode = Drawing2D.SmoothingMode.HighSpeed;
graphics.FillRectangle(
Brushes.Black, new Rectangle(0, 0, result.Width, result.Height));
graphics.DrawImage(image, rect);
}
return(result);
}
catch (Exception) {
result.Dispose();
throw;
}
}
internal static Image ResizeImage(Image image, int width, int height,
ThumbnailMakerBorder border)
{
var nw = (float)image.Width;
var nh = (float)image.Height;
if (nw > width) {
nh = width * nh / nw;
nw = width;
}
if (nh > height) {
nw = height * nw / nh;
nh = height;
}
var result = new Bitmap(
border == ThumbnailMakerBorder.Bordered ? width : (int)nw,
border == ThumbnailMakerBorder.Bordered ? height : (int)nh
);
try {
try {
result.SetResolution(image.HorizontalResolution, image.VerticalResolution);
}
catch (Exception ex) {
_logger.Debug("Failed to set resolution", ex);
}
using (var graphics = Graphics.FromImage(result)) {
if (result.Width > image.Width && result.Height > image.Height) {
graphics.CompositingQuality =
Drawing2D.CompositingQuality.HighQuality;
graphics.InterpolationMode =
Drawing2D.InterpolationMode.High;
}
else {
graphics.CompositingQuality =
Drawing2D.CompositingQuality.HighSpeed;
graphics.InterpolationMode = Drawing2D.InterpolationMode.Bicubic;
}
var rect = new Rectangle(
(int)(result.Width - nw) / 2,
(int)(result.Height - nh) / 2,
(int)nw, (int)nh
);
graphics.SmoothingMode = Drawing2D.SmoothingMode.HighSpeed;
graphics.FillRectangle(
Brushes.Black, new Rectangle(0, 0, result.Width, result.Height));
graphics.DrawImage(image, rect);
}
return result;
}
catch (Exception) {
result.Dispose();
throw;
}
}
