/// <summary>
/// Resize an image.
/// </summary>
/// <param name="img">Image to resize.</param>
/// <param name="w">Width of the returned image.</param>
/// <param name="h">Height of the returned image.</param>
/// <param name="f">Flags to customize scaling behavior.</param>
/// <returns>Resized image. This object is always different
/// from <paramref name="img" /> (i.e. they can be
/// disposed separately).</returns>
public static Image ScaleImage(Image img, int w, int h,
ScaleTransformFlags f)
{
if (img == null)
{
throw new ArgumentNullException("img");
}
if (w < 0)
{
throw new ArgumentOutOfRangeException("w");
}
if (h < 0)
{
throw new ArgumentOutOfRangeException("h");
}
bool bUIIcon = ((f & ScaleTransformFlags.UIIcon) !=
ScaleTransformFlags.None);
// We must return a Bitmap object for UIUtil.CreateScaledImage
Bitmap bmp = new Bitmap(w, h, PixelFormat.Format32bppArgb);
using (Graphics g = Graphics.FromImage(bmp))
{
g.Clear(Color.Transparent);
g.SmoothingMode = SmoothingMode.HighQuality;
g.CompositingQuality = CompositingQuality.HighQuality;
int wSrc = img.Width;
int hSrc = img.Height;
InterpolationMode im = InterpolationMode.HighQualityBicubic;
if ((wSrc > 0) && (hSrc > 0))
{
if (bUIIcon && ((w % wSrc) == 0) && ((h % hSrc) == 0))
{
im = InterpolationMode.NearestNeighbor;
}
// else if((w < wSrc) && (h < hSrc))
// im = InterpolationMode.HighQualityBilinear;
}
else
{
Debug.Assert(false);
}
g.InterpolationMode = im;
RectangleF rSource = new RectangleF(0.0f, 0.0f, wSrc, hSrc);
RectangleF rDest = new RectangleF(0.0f, 0.0f, w, h);
AdjustScaleRects(ref rSource, ref rDest);
g.DrawImage(img, rDest, rSource, GraphicsUnit.Pixel);
}
return(bmp);
}
/// <summary>
/// Resize an image.
/// </summary>
/// <param name="img">Image to resize.</param>
/// <param name="w">Width of the returned image.</param>
/// <param name="h">Height of the returned image.</param>
/// <param name="f">Flags to customize scaling behavior.</param>
/// <returns>Resized image. This object is always different
/// from <paramref name="img" /> (i.e. they can be
/// disposed separately).</returns>
public static Image ScaleImage(Image img, int w, int h,
ScaleTransformFlags f)
{
if(img == null) throw new ArgumentNullException("img");
if(w < 0) throw new ArgumentOutOfRangeException("w");
if(h < 0) throw new ArgumentOutOfRangeException("h");
bool bUIIcon = ((f & ScaleTransformFlags.UIIcon) !=
ScaleTransformFlags.None);
// We must return a Bitmap object for UIUtil.CreateScaledImage
Bitmap bmp = new Bitmap(w, h, PixelFormat.Format32bppArgb);
using(Graphics g = Graphics.FromImage(bmp))
{
g.Clear(Color.Transparent);
g.SmoothingMode = SmoothingMode.HighQuality;
g.CompositingQuality = CompositingQuality.HighQuality;
int wSrc = img.Width;
int hSrc = img.Height;
InterpolationMode im = InterpolationMode.HighQualityBicubic;
if((wSrc > 0) && (hSrc > 0))
{
if(bUIIcon && ((w % wSrc) == 0) && ((h % hSrc) == 0))
im = InterpolationMode.NearestNeighbor;
// else if((w < wSrc) && (h < hSrc))
// im = InterpolationMode.HighQualityBilinear;
}
else { Debug.Assert(false); }
g.InterpolationMode = im;
RectangleF rSource = new RectangleF(0.0f, 0.0f, wSrc, hSrc);
RectangleF rDest = new RectangleF(0.0f, 0.0f, w, h);
AdjustScaleRects(ref rSource, ref rDest);
g.DrawImage(img, rDest, rSource, GraphicsUnit.Pixel);
}
return bmp;
}
public static Image ScaleImage(Image m_imgOrg, int?w, int?h, ScaleTransformFlags flags)
{
return(null);
}
public static Image <Rgba32> ScaleImage(Image <Rgba32> m_imgOrg, int?w, int?h, ScaleTransformFlags flags)
{
m_imgOrg.Mutate(i => i.Resize(w.GetValueOrDefault(), h.GetValueOrDefault()));
return(m_imgOrg);
}
