/// <summary>
/// Resize an image
/// </summary>
/// <param name="source"></param>
/// <param name="parameters"></param>
/// <returns></returns>
public virtual Bitmap Resize(object source, ResizeSettings parameters)
{
using (var job = new ImageJob(source))
{
var layout = _imageLayoutBuilder.BuildLayout(job.Bitmap.Size, parameters);
var bmp = new Bitmap((int)layout.CanvasSize.Width, (int)layout.CanvasSize.Height, PixelFormat.Format24bppRgb);
var gfx = Graphics.FromImage(bmp);
gfx.InterpolationMode = InterpolationMode.HighQualityBicubic;
gfx.SmoothingMode = SmoothingMode.HighQuality;
gfx.PixelOffsetMode = PixelOffsetMode.HighQuality;
gfx.CompositingQuality = CompositingQuality.HighQuality;
gfx.CompositingMode = CompositingMode.SourceOver;
// white background
gfx.FillRectangle(new SolidBrush(Color.White), 0, 0, layout.CanvasSize.Width, layout.CanvasSize.Height);
// draw the image
gfx.DrawImage(job.Bitmap, layout.Image, new RectangleF(0, 0, job.Bitmap.Width, job.Bitmap.Height), GraphicsUnit.Pixel);
// commit
gfx.Flush(FlushIntention.Flush);
gfx.Dispose();
return(bmp);
}
}
protected virtual void AssertLayout(string sourceSize, string resizeSettings, Action <RectangleF> assertImage, Action <SizeF> assertCanvas)
{
var sourceSizeSettings = new ResizeSettings(sourceSize);
var result = _imageLayoutBuilder.BuildLayout(new Size(sourceSizeSettings.Width, sourceSizeSettings.Height), new ResizeSettings(resizeSettings));
if (assertCanvas != null)
{
assertCanvas(result.CanvasSize);
}
if (assertImage != null)
{
assertImage(result.Image);
}
var maxWidth = (int)(Math.Max(result.Image.Width, result.CanvasSize.Width));
var maxHeight = (int)(Math.Max(result.Image.Height, result.CanvasSize.Height));
var padding = (int)Math.Max(Math.Abs(result.Image.Y), Math.Abs(result.Image.X)) + 20;
if ((maxWidth + padding) < 400)
{
padding = (400 - maxWidth) / 2;
}
// create a bitmap for visualizing
var bitmapSize = new RectangleF(0, 0, maxWidth + padding * 2, maxHeight + (padding * 2));
using (var bmp = new Bitmap((int)bitmapSize.Width, (int)bitmapSize.Height))
{
using (var gfx = Graphics.FromImage(bmp))
{
// set the background
gfx.FillRectangle(new SolidBrush(Color.White), 0, 0, bmp.Width, bmp.Height);
// output the results
gfx.DrawString("Source: " + sourceSize, new Font("Thaoma", 8), Brushes.Black, new RectangleF(0, 0, bmp.Width, bmp.Height), new StringFormat {
Alignment = StringAlignment.Near, LineAlignment = StringAlignment.Near
});
gfx.DrawString("Destination: " + resizeSettings, new Font("Thaoma", 8), Brushes.Black, new RectangleF(0, 0, bmp.Width, bmp.Height), new StringFormat {
Alignment = StringAlignment.Far, LineAlignment = StringAlignment.Near
});
gfx.DrawString("Canvas: " + result.CanvasSize.Width + "x" + result.CanvasSize.Height, new Font("Thaoma", 8), Brushes.Green, new RectangleF(0, 0, bmp.Width, bmp.Height), new StringFormat {
Alignment = StringAlignment.Near, LineAlignment = StringAlignment.Far
});
gfx.DrawString("Image: " + result.Image.Width + "x" + result.Image.Height, new Font("Thaoma", 8), Brushes.Red, new RectangleF(0, 0, bmp.Width, bmp.Height), new StringFormat {
Alignment = StringAlignment.Far, LineAlignment = StringAlignment.Far
});
//PolygonMath.AlignWith()
var canvas = new RectangleF(padding, padding, result.CanvasSize.Width, result.CanvasSize.Height);
var image = new RectangleF(padding + result.Image.X, padding + result.Image.Y, result.Image.Width, result.Image.Height);
var points = new List <PointF>();
points.AddRange(PolygonMath.ToPoly(canvas));
points.AddRange(PolygonMath.ToPoly(image));
points = PolygonMath.AlignWith(points.ToArray(), PolygonMath.ToPoly(bitmapSize), ContentAlignment.MiddleCenter).ToList();
canvas = PolygonMath.GetBoundingBox(points.Take(4).ToArray());
image = PolygonMath.GetBoundingBox(points.Skip(4).Take(4).ToArray());
gfx.FillRectangle(new SolidBrush(Color.Green), canvas);
gfx.DrawRectangle(new Pen(Color.Red, 2), image.X, image.Y, image.Width, image.Height);
}
var fileName = sourceSize + "--" + resizeSettings + ".bmp";
var filePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, fileName);
if (File.Exists(filePath))
{
File.Delete(filePath);
}
bmp.Save(filePath, ImageFormat.Bmp);
Trace.WriteLine("Source: " + sourceSize);
Trace.WriteLine("Destination: " + resizeSettings);
Trace.WriteLine(" Result: " + filePath);
}
}
