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 System.Drawing.Bitmap
ClearGdiBitmap();
_lastGdiBitmap = outBitmap.ToGdiBitmap();
outBitmap.Dispose();
// show the result in the PictureBox
pictureBox1.Image = _lastGdiBitmap;
}
/// <summary>
/// Draws the image on SurfaceImageSource.
/// </summary>
void UpdateImageSource(ImageEffect imageEffect)
{
int w = _bitmap.PixelWidth + _marginLT + _marginRB;
int h = _bitmap.PixelHeight + _marginLT + _marginRB;
Point2L surfaceOffset = Point2L.Empty;
DXGI.Surface dxgiSurface = null;
var hr = HResult.Ok;
// receive the target DXGI.Surface and offset for drawing
for (int i = 0; i <= 1; i++)
{
hr = _sisNative.BeginDraw(new RectL(w, h), out surfaceOffset, out dxgiSurface);
if ((hr != DXGI.ResultCode.DeviceRemoved && hr != DXGI.ResultCode.DeviceReset) || i > 0)
{
break;
}
// try to recreate the device resources if the old GPU device was removed
DiscardDeviceResources();
CreateDeviceResources();
_sisNative.SetDevice(_dxgiDevice);
}
hr.CheckError();
// the render target object
var rt = _d2dContext;
// create the target Direct2D bitmap for the given DXGI.Surface
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, dxgiSurface, bpTarget);
dxgiSurface.Dispose();
// associate the target bitmap with render target
rt.SetTarget(targetBmp);
targetBmp.Dispose();
// 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
surfaceOffset.X += _marginLT;
surfaceOffset.Y += _marginLT;
var targetOffset = surfaceOffset.ToPoint2F();
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 additional 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)
rt.EndDraw();
// detach and actually dispose the target bitmap
rt.SetTarget(null);
// complete drawing on SurfaceImageSource
_sisNative.EndDraw();
}
