/// <summary>
/// Resizes the image and encodes the BlurHash representation of the image.
/// </summary>
/// <param name="xComponent">The number x components.</param>
/// <param name="yComponent">The number y components.</param>
/// <param name="filename">The path to an encoded image on the file system.</param>
/// <param name="maxWidth">The maximum width to resize the image to.</param>
/// <param name="maxHeight">The maximum height to resize the image to.</param>
/// <returns>BlurHash representation of the image.</returns>
public static string Encode(int xComponent, int yComponent, string filename, int maxWidth, int maxHeight)
{
using (var bitmap = new Bitmap(filename))
{
var(scaledWidth, scaledHeight) = ScaleHelper.GetScaleDimensions(bitmap.Width, bitmap.Height, maxWidth, maxHeight);
using (var scaledBitmap = new Bitmap(bitmap, new Size(scaledWidth, scaledHeight)))
{
if (scaledBitmap.PixelFormat == System.Drawing.Imaging.PixelFormat.Format24bppRgb)
{
return(EncodeInternal(xComponent, yComponent, scaledBitmap, PixelFormat.BGR888));
}
else if (scaledBitmap.PixelFormat == System.Drawing.Imaging.PixelFormat.Format32bppArgb)
{
return(EncodeInternal(xComponent, yComponent, scaledBitmap, PixelFormat.BGR888x));
}
using (var temporaryBitmap = new Bitmap(scaledBitmap.Width, scaledBitmap.Height, System.Drawing.Imaging.PixelFormat.Format24bppRgb))
{
using (var graphics = Graphics.FromImage(temporaryBitmap))
{
graphics.DrawImageUnscaled(scaledBitmap, 0, 0);
}
return(EncodeInternal(xComponent, yComponent, temporaryBitmap, PixelFormat.BGR888));
}
}
}
}
/// <summary>
/// Resizes the image and encodes the BlurHash representation of the image.
/// </summary>
/// <param name="xComponent">The number x components.</param>
/// <param name="yComponent">The number y components.</param>
/// <param name="filename">The path to an encoded image on the file system.</param>
/// <param name="maxWidth">The maximum width to resize the image to.</param>
/// <param name="maxHeight">The maximum height to resize the image to.</param>
/// <returns>BlurHash representation of the image.</returns>
public static string Encode(int xComponent, int yComponent, string filename, int maxWidth, int maxHeight)
{
using (SKCodec codec = SKCodec.Create(filename))
{
var width = codec.Info.Width;
var height = codec.Info.Height;
float scaleFactor = 0;
if (width > maxWidth || height > maxHeight)
{
scaleFactor = ScaleHelper.GetScale(width, height, maxWidth, maxHeight);
SKSizeI supportedScale = codec.GetScaledDimensions(scaleFactor);
width = supportedScale.Width;
height = supportedScale.Height;
}
var newInfo = new SKImageInfo()
{
Width = width,
Height = height,
ColorType = SKColorType.Rgba8888,
AlphaType = SKAlphaType.Unpremul,
ColorSpace = SKColorSpace.CreateSrgb()
};
using (SKBitmap bitmap = SKBitmap.Decode(codec, newInfo))
{
if (scaleFactor == 0)
{
return(EncodeInternal(xComponent, yComponent, bitmap));
}
var(scaledWidth, scaledHeight) = ScaleHelper.GetScaleDimensions(bitmap.Width, bitmap.Height, scaleFactor);
newInfo = newInfo.WithSize(scaledWidth, scaledHeight);
using (SKBitmap scaledBitmap = bitmap.Resize(newInfo, SKFilterQuality.Low))
{
return(EncodeInternal(xComponent, yComponent, scaledBitmap));
}
}
}
}
public void Scale_Success(int width, int height, int maxWidth, int maxHeight, int scaledWidth, int scaledHeight)
{
var(w, h) = ScaleHelper.GetScaleDimensions(width, height, maxWidth, maxHeight);
Assert.Equal(w, scaledWidth);
Assert.Equal(h, scaledHeight);
}
