public static Image ResizeImage(Image image, int maxWidthOrHeight)
{
ExceptionUtils.ThrowIfZeroOrNegative(maxWidthOrHeight, "maxWidthOrHeight");
if ((image.Width <= maxWidthOrHeight) && (image.Height <= maxWidthOrHeight))
{
return(image);
}
int newWidth, newHeight;
if (image.Width > image.Height)
{
newWidth = maxWidthOrHeight;
newHeight = (image.Height * maxWidthOrHeight) / image.Width;
if (newHeight < 0)
{
newHeight = 1;
}
}
else
{
newWidth = (image.Width * maxWidthOrHeight) / image.Height;
newHeight = maxWidthOrHeight;
if (newWidth < 0)
{
newWidth = 1;
}
}
return(ResizeImage(image, newWidth, newHeight));
}
public static Image ResizeImage(Image image, int width, int height)
{
ExceptionUtils.ThrowIfZeroOrNegative(width, "width");
ExceptionUtils.ThrowIfZeroOrNegative(height, "height");
if ((image.Width != width) || (image.Height != height))
{
Bitmap resizeImage = new Bitmap(width, height, PixelFormat.Format24bppRgb);
using (Graphics graphics = System.Drawing.Graphics.FromImage(resizeImage))
{
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
graphics.CompositingQuality = CompositingQuality.HighQuality;
graphics.DrawImage(image, 0, 0, width, height);
}
return(resizeImage);
}
else
{
return(image);
}
}
