public void CanFit_SmallerWideBox()
{
var dOriginal = new Dimention(width: 100, height: 50);
var dBox = new Dimention(width: 50, height: 50);
var scaled = dOriginal.GetSizeToFitInto(dBox);
Assert.True(scaled.Width == 50 && scaled.Height == 25);
}
public void CanFit_BiggerHighBox()
{
var dOriginal = new Dimention(width: 100, height: 100);
var dBox = new Dimention(width: 200, height: 150);
var scaled = dOriginal.GetSizeToFitInto(dBox);
Assert.True(scaled.Width == 150 && scaled.Height == 150);
}
public Result <SizedImageData> GetScaledJpegBytes(byte[] data, ResizeOption resizeOption)
{
if (resizeOption.ImgType == ImageType.Unknown)
{
return(Result <SizedImageData> .NewFailure($"{nameof(resizeOption.ImgType)} {resizeOption.ImgType} is not supported."));
}
if (resizeOption.OperationType == ResizeOperationType.Unknown)
{
return(Result <SizedImageData> .NewFailure($"{nameof(resizeOption.OperationType)} {resizeOption.OperationType} is not supported."));
}
byte[] resizedBytes;
Dimention newSize;
try
{
using (var imageReadStream = new MemoryStream(data))
using (var sourceImg = Image.FromStream(imageReadStream))
{
var sourceSize = new Dimention(height: sourceImg.Height, width: sourceImg.Width);
switch (resizeOption.OperationType)
{
case ResizeOperationType.Raw:
return(Result <SizedImageData> .NewSuccess(new SizedImageData(resizeOption.ImgType, sourceSize, data)));
case ResizeOperationType.Fit:
newSize = sourceSize.GetSizeToFitInto(resizeOption.Size);
// Resize
using (var outputMs = new MemoryStream())
{
using (var canvas = new Bitmap(width: newSize.Width, height: newSize.Height))
using (var graphics = Graphics.FromImage(canvas))
{
graphics.CompositingQuality = CompositingQuality.HighSpeed;
graphics.InterpolationMode = InterpolationMode.HighQualityBilinear;
graphics.CompositingMode = CompositingMode.SourceCopy;
graphics.DrawImage(sourceImg, 0, 0, width: newSize.Width, height: newSize.Height);
canvas.Save(outputMs, ImageFormat.Jpeg);
}
resizedBytes = outputMs.ToArray();
}
break;
case ResizeOperationType.Fill:
newSize = resizeOption.Size;
var rectDst = new Rectangle(0, 0, width: resizeOption.Size.Width, height: resizeOption.Size.Height);
var souceSize = new Dimention(width: sourceImg.Width, height: sourceImg.Height);
var rectSrc = sourceSize.GetCenterRectangleToFill(resizeOption.Size);
// Resize
using (var outputMs = new MemoryStream())
{
using (var canvas = new Bitmap(width: resizeOption.Size.Width, height: resizeOption.Size.Height))
using (var graphics = Graphics.FromImage(canvas))
{
graphics.CompositingQuality = CompositingQuality.HighSpeed;
graphics.InterpolationMode = InterpolationMode.HighQualityBilinear;
graphics.CompositingMode = CompositingMode.SourceCopy;
graphics.DrawImage(image: sourceImg, destRect: rectDst, srcRect: rectSrc, srcUnit: GraphicsUnit.Pixel);
canvas.Save(outputMs, ImageFormat.Jpeg);
}
resizedBytes = outputMs.ToArray();
}
break;
default:
return(Result <SizedImageData> .NewFailure($"{nameof(resizeOption.OperationType)}: '{resizeOption.OperationType}' is not supported."));
}
}
var result = new SizedImageData(imgType: resizeOption.ImgType, size: newSize, bytes: resizedBytes);
return(Result <SizedImageData> .NewSuccess(result));
}
catch (Exception ex)
{
return(Result <SizedImageData> .NewFailure(ex.ToString()));
}
}