public void Resize()
{
var file = "test3.jpg";
MagickWandEnvironment.Genesis();
using(var mw = new MagickWand())
{
mw.ReadImage("test.jpg");
mw.ResizeImage(120, 100, FilterTypes.LanczosFilter, 1);
mw.WriteImage(file, true);
Assert.True(File.Exists(file), "scaled image not created");
}
using(var mw = new MagickWand(file))
{
Assert.True(mw.ImageWidth == 120, "width does not match the expected size");
Assert.True(mw.ImageHeight == 100, "height does not match the expected size");
}
File.Delete(file);
MagickWandEnvironment.Terminus();
}
private byte[] ResizeImage(System.Drawing.Image image, int width, int height)
{
var stream = new MemoryStream();
image.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
try {
var wand = new MagickWand();
wand.ReadImageBlob(stream.ToArray());
wand.ResizeImage(width, height, FilterType.Mitchell, 0.5);
return(wand.GetImageBlob());
} catch (Exception ex) {
Debug.Fail(ex.ToString());
}
return(stream.ToArray());
}
public void SaveResizedImage(int newWidth, int newHeight, string outPath)
{
CreateDirectoryForFile(outPath);
using (MagickWand wand = new MagickWand()) {
wand.ReadImage(filename);
if (width > newWidth && height > newHeight) {
wand.ResizeImage((uint)newWidth, (uint)newHeight);
} else {
// XXX: Make a new image that's newwidth by newheight
// and center old image in it
}
wand.WriteImage (outPath);
}
}
byte[] ResizeImage(Image image, int width, int height)
{
var stream = new MemoryStream();
image.Save(stream, ImageFormat.Png);
try {
var wand = new MagickWand();
wand.ReadImageBlob(stream.ToArray());
wand.ResizeImage(width, height, FilterType.Mitchell, 0.5);
return(wand.GetImageBlob());
} catch (Exception ex) {
Debug.Fail(ex.ToString());
// http://stackoverflow.com/a/24199315/1976323
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.HighQuality;
graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
using (var wrapMode = new ImageAttributes())
{
wrapMode.SetWrapMode(WrapMode.TileFlipXY);
graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, wrapMode);
}
}
stream.Seek(0, SeekOrigin.Begin);
destImage.Save(stream, ImageFormat.Png);
}
return(stream.ToArray());
}