async void MainPage_Loaded(object sender, RoutedEventArgs e)
{
// locate the image
var imageUri = new Uri("ms-appx:///Assets/GcLogo.png");
var storageFile = await StorageFile.GetFileFromApplicationUriAsync(imageUri);
// load the image into C1Bitmap
_bitmap = new C1Bitmap();
await _bitmap.LoadAsync(storageFile, new FormatConverter(PixelFormat.Format32bppPBGRA));
// create Direct2D and DirectWrite factories
_d2dFactory = D2D.Factory2.Create(D2D.FactoryType.SingleThreaded);
_dwFactory = DW.Factory.Create(DW.FactoryType.Shared);
// create GPU resources
CreateDeviceResources();
// create the image source
_imageSource = new SurfaceImageSource(_marginLT + _bitmap.PixelWidth + _marginRB, _marginLT + _bitmap.PixelHeight + _marginRB, false);
// obtain the native interface for the image source
_sisNative = ComObject.QueryInterface <DXGI.ISurfaceImageSourceNative>(_imageSource);
_sisNative.SetDevice(_dxgiDevice);
// draw the image to SurfaceImageSource
UpdateImageSource(ImageEffect.Original);
// associate the image source with the Image
image.Source = _imageSource;
}
void CreateImageSource()
{
ClearImageSource();
_imageSource = new SurfaceImageSource(_bitmap.PixelWidth, _bitmap.PixelHeight, false);
_sisNative = ComObject.QueryInterface <DXGI.ISurfaceImageSourceNative>(_imageSource);
_sisNative.SetDevice(_dxgiDevice);
UpdateImageSource(false);
image.Source = _imageSource;
}
void UpdateImageSource(bool applyWarpEffect)
{
Point2L surfaceOffset;
DXGI.Surface dxgiSurface;
int w = _bitmap.PixelWidth;
int h = _bitmap.PixelHeight;
var hr = _sisNative.BeginDraw(new RectL(w, h), out surfaceOffset, out dxgiSurface);
if (hr == DXGI.ResultCode.DeviceRemoved || hr == DXGI.ResultCode.DeviceReset)
{
DiscardDeviceResources();
CreateDeviceResources();
_sisNative.SetDevice(_dxgiDevice);
return;
}
hr.CheckError();
var rt = _d2dContext;
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();
rt.SetTarget(targetBmp);
rt.BeginDraw();
rt.Clear(null);
var buffer = _bitmap.ToD2DBitmap1(rt, D2D.BitmapOptions.None);
if (!applyWarpEffect)
{
rt.DrawBitmap(buffer, new RectF(surfaceOffset.X, surfaceOffset.Y, w, h));
}
else
{
_warp.SetNormPositions(_warpStart, _warpEnd);
_warp.Effect.SetInput(0, buffer);
rt.DrawImage(_warp.Effect, new Point2F(surfaceOffset.X, surfaceOffset.Y));
//_blur.SetInputEffect(0, _warp.Effect);
//rt.DrawImage(_blur, new Point2F(surfaceOffset.X, surfaceOffset.Y));
}
buffer.Dispose();
rt.EndDraw();
rt.SetTarget(null);
if (applyWarpEffect)
{
var srcRect = new RectL(surfaceOffset.X, surfaceOffset.Y, w, h);
_bitmap.ImportAsFragment(targetBmp, rt, srcRect, 0, 0);
}
targetBmp.Dispose();
_sisNative.EndDraw();
}
/// <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();
}
