void LoadDefaultImage()
{
Assembly asm = typeof(Crop).Assembly;
using (Stream stream = asm.GetManifestResourceStream("BitmapSamples.Resources.GrapeCity.jpg"))
{
_bitmap.Load(stream, new FormatConverter(PixelFormat.Format32bppPBGRA));
}
image.Source = _bitmap.ToWriteableBitmap();
imageGrid.Width = _bitmap.PixelWidth;
imageGrid.Height = _bitmap.PixelHeight;
InitSelection();
}
void OnDragCompleted(object sender, C1DragCompletedEventArgs e)
{
imageGrid.Children.Remove(_line);
var start = new Point(_position.X + e.CumulativeTranslation.X, _position.Y + e.CumulativeTranslation.Y);
var end = _position;
var w = image.ActualWidth;
var h = image.ActualHeight;
_warpStart = new Point2F((float)(start.X / w), (float)(start.Y / h));
_warpEnd = new Point2F((float)(end.X / w), (float)(end.Y / h));
UpdateImageSource();
image.Source = _bitmap.ToWriteableBitmap();
}
void UpdateImage()
{
image.Source = _bitmap.ToWriteableBitmap();
imageGrid.Width = _bitmap.PixelWidth;
imageGrid.Height = _bitmap.PixelHeight;
InitSelection();
}
void UpdateImageSource(ImageEffect imageEffect)
{
// some effects can change pixels outside the bounds of the source
// image, so we need a margin to make those pixels visible
var targetOffset = new Point2F(_marginLT, _marginLT);
int w = _bitmap.PixelWidth + _marginLT + _marginRB;
int h = _bitmap.PixelHeight + _marginLT + _marginRB;
// the render target object
var rt = _d2dContext;
// create the target Direct2D bitmap
var bpTarget = new D2D.BitmapProperties1(
new D2D.PixelFormat(DXGI.Format.B8G8R8A8_UNorm, D2D.AlphaMode.Premultiplied),
(float)_bitmap.DpiX, (float)_bitmap.DpiY, D2D.BitmapOptions.Target | D2D.BitmapOptions.CannotDraw);
var targetBmp = D2D.Bitmap1.Create(rt, new Size2L(w, h), bpTarget);
// associate the target bitmap with render target
rt.SetTarget(targetBmp);
// start drawing
rt.BeginDraw();
// clear the target bitmap
rt.Clear(null);
// convert C1Bitmap image to Direct2D image
var d2dBitmap = _bitmap.ToD2DBitmap1(rt, D2D.BitmapOptions.None);
// apply the effect or just draw the original image
switch (imageEffect)
{
case ImageEffect.Original:
rt.DrawImage(d2dBitmap, targetOffset);
break;
case ImageEffect.GaussianBlur:
rt.DrawImage(ApplyGaussianBlur(d2dBitmap), targetOffset);
break;
case ImageEffect.Sharpen:
rt.DrawImage(ApplySharpen(d2dBitmap), targetOffset);
break;
case ImageEffect.HorizontalSmear:
rt.DrawImage(ApplyHorizontalSmear(d2dBitmap), targetOffset);
break;
case ImageEffect.Shadow:
rt.DrawImage(ApplyShadow(d2dBitmap), targetOffset);
break;
case ImageEffect.DisplacementMap:
rt.DrawImage(ApplyDisplacementMap(d2dBitmap), targetOffset);
break;
case ImageEffect.Emboss:
rt.DrawImage(ApplyEmboss(d2dBitmap), targetOffset);
break;
case ImageEffect.EdgeDetect:
rt.DrawImage(ApplyEdgeDetect(d2dBitmap), targetOffset);
break;
case ImageEffect.Sepia:
rt.DrawImage(ApplySepia(d2dBitmap), targetOffset);
break;
}
d2dBitmap.Dispose();
// draw the text label in case of the Shadow effect
if (imageEffect == ImageEffect.Shadow)
{
var mr = Matrix3x2.Rotation(-90f);
var mt = Matrix3x2.Translation(targetOffset.X + 6f, targetOffset.Y + 344f);
rt.Transform = mr * mt;
_brush.SetColor(ColorF.White);
rt.DrawTextLayout(new Point2F(-1f, -1f), _textLayout, _brush);
_brush.SetColor(ColorF.DimGray);
rt.DrawTextLayout(Point2F.Empty, _textLayout, _brush);
rt.Transform = Matrix3x2.Identity;
}
// finish drawing (all drawing commands are executed at that moment)
if (!rt.EndDraw(true))
{
targetBmp.Dispose();
// try to recreate the device resources if the old GPU device was removed
DiscardDeviceResources();
CreateDeviceResources();
return;
}
// detach the target bitmap
rt.SetTarget(null);
// create a temporary C1Bitmap object
var outBitmap = new C1Bitmap(_bitmap.ImagingFactory);
// import the image from Direct2D target bitmap to C1Bitmap
outBitmap.Import(targetBmp, rt, new RectL(w, h));
targetBmp.Dispose();
// convert C1Bitmap to a WriteableBitmap, then use it as an image source
image.Source = outBitmap.ToWriteableBitmap();
outBitmap.Dispose();
}