/// <summary>
/// ctor
/// </summary>
/// <param name="capture">Capture object</param>
public LinearGradientBrushElement(Capture capture)
{
// Set the default values
_startPoint = Vector2.Zero;
_endPoint = Vector2.Zero;
_opacity = 1f;
_alphaMode = (CanvasAlphaMode)0;
_bufferPrecision = (CanvasBufferPrecision)0;
_edgeBehavior = (CanvasEdgeBehavior)0;
// Default ColorSpace is sRGB
_preInterpolationColorSpace = CanvasColorSpace.Srgb;
_postInterpolationColorSpace = CanvasColorSpace.Srgb;
_gradientStops = new List <CanvasGradientStop>();
// Initialize
Initialize(capture);
}
private CanvasRenderTarget CreateSourceImage(CanvasControl sender, CanvasAlphaMode alphaMode)
{
var image = new CanvasRenderTarget(sender, 64, 64, sender.Dpi, DirectXPixelFormat.B8G8R8A8UIntNormalized, alphaMode);
using (var ds = image.CreateDrawingSession())
{
ds.Clear(Colors.Transparent);
ds.FillRectangle(0, 0, 64, 16, Colors.Blue);
ds.FillRectangle(0, 32 - 8, 64, 16, Color.FromArgb(128, 0, 0, 255));
ds.FillRectangle(0, 64 - 16, 64, 16, Colors.Blue);
ds.FillCircle(32, 32, 16, Colors.Yellow);
}
return(image);
}
/// <summary>
/// ctor
/// </summary>
/// <param name="capture">Capture object</param>
public RadialGradientHdrBrushElement(Capture capture)
{
// Set the default values
_radiusX = 0f;
_radiusY = 0f;
_center = Vector2.Zero;
_originOffset = Vector2.Zero;
_opacity = 1f;
_alphaMode = (CanvasAlphaMode)0;
_bufferPrecision = (CanvasBufferPrecision)0;
_edgeBehavior = (CanvasEdgeBehavior)0;
// Default ColorSpace is sRGB
_preInterpolationColorSpace = CanvasColorSpace.Srgb;
_postInterpolationColorSpace = CanvasColorSpace.Srgb;
_gradientStopHdrs = new List <CanvasGradientStopHdr>();
// Initialize
Initialize(capture);
}
void TestCreateFromSoftwareBitmap(CanvasDevice device, BitmapPixelFormat pixelFormat, BitmapAlphaMode alphaMode)
{
if (pixelFormat == BitmapPixelFormat.Unknown)
{
return;
}
int anyWidth = 3;
int anyHeight = 5;
var softwareBitmap = new SoftwareBitmap(pixelFormat, anyWidth, anyHeight, alphaMode);
if (!IsFormatSupportedByWin2D(pixelFormat, alphaMode))
{
Assert.ThrowsException <Exception>(() =>
{
CanvasBitmap.CreateFromSoftwareBitmap(device, softwareBitmap);
});
return;
}
var canvasBitmap = CanvasBitmap.CreateFromSoftwareBitmap(device, softwareBitmap);
Assert.AreEqual(anyWidth, (int)canvasBitmap.SizeInPixels.Width);
Assert.AreEqual(anyHeight, (int)canvasBitmap.SizeInPixels.Height);
Assert.AreEqual(GetDirectXPixelFormatUsedForBitmapPixelFormat(pixelFormat), canvasBitmap.Format);
CanvasAlphaMode expectedAlphaMode = CanvasAlphaMode.Straight;
switch (alphaMode)
{
case BitmapAlphaMode.Ignore: expectedAlphaMode = CanvasAlphaMode.Ignore; break;
case BitmapAlphaMode.Premultiplied: expectedAlphaMode = CanvasAlphaMode.Premultiplied; break;
case BitmapAlphaMode.Straight: expectedAlphaMode = CanvasAlphaMode.Straight; break;
}
Assert.AreEqual(expectedAlphaMode, canvasBitmap.AlphaMode);
}
private CanvasRenderTarget CreateSourceImage(CanvasControl sender, CanvasAlphaMode alphaMode)
{
var image = new CanvasRenderTarget(sender, 64, 64, sender.Dpi, DirectXPixelFormat.B8G8R8A8UIntNormalized, alphaMode);
using (var ds = image.CreateDrawingSession())
{
ds.Clear(Colors.Transparent);
ds.FillRectangle(0, 0, 64, 16, Colors.Blue);
ds.FillRectangle(0, 32 - 8, 64, 16, Color.FromArgb(128, 0, 0, 255));
ds.FillRectangle(0, 64 - 16, 64, 16, Colors.Blue);
ds.FillCircle(32, 32, 16, Colors.Yellow);
}
return image;
}
private CanvasRenderTarget CreateTarget(CanvasControl sender, CanvasAlphaMode alphaMode)
{
return new CanvasRenderTarget(sender, 64, 64, sender.Dpi, DirectXPixelFormat.B8G8R8A8UIntNormalized, alphaMode);
}
private CanvasRenderTarget CreateTarget(CanvasControl sender, CanvasAlphaMode alphaMode)
{
return(new CanvasRenderTarget(sender, 64, 64, sender.Dpi, DirectXPixelFormat.B8G8R8A8UIntNormalized, alphaMode));
}
static void ValidateCannotCreateRenderTarget(CanvasDevice device, DirectXPixelFormat format, CanvasAlphaMode alphaMode)
{
ValidateUnsupportedPixelFormatException(() =>
{
new CanvasRenderTarget(device, 16, 16, 96, format, alphaMode);
});
}
static void ValidateCannotCreateBitmap(CanvasDevice device, DirectXPixelFormat format, CanvasAlphaMode alphaMode)
{
ValidateUnsupportedPixelFormatException(() =>
{
CanvasBitmap.CreateFromBytes(device, new byte[1024], 4, 4, format, 96, alphaMode);
});
}
//边缘检测方法
public static ICanvasImage GetEdgeDetection(ICanvasImage canvasImage, float Amount, float BlurAmount = 0, EdgeDetectionEffectMode Mode = EdgeDetectionEffectMode.Sobel, CanvasAlphaMode AlphaMode = CanvasAlphaMode.Premultiplied, bool OverlayEdges = false)
{
if (Amount < 0)
{
Amount = 0;
}
else if (Amount > 1)
{
Amount = 1;
}
if (BlurAmount < 0)
{
BlurAmount = 0;
}
else if (BlurAmount > 10)
{
BlurAmount = 10;
}
return(new EdgeDetectionEffect
{
Source = canvasImage,
Amount = Amount,
BlurAmount = BlurAmount,
Mode = Mode,
AlphaMode = AlphaMode,
OverlayEdges = OverlayEdges,
});
}
static void ValidateCannotCreateRenderTarget(CanvasDevice device, DirectXPixelFormat format, CanvasAlphaMode alphaMode)
{
ValidateUnsupportedPixelFormatException(() =>
{
new CanvasRenderTarget(device, 16, 16, 96, format, alphaMode);
});
}
static void ValidateCannotCreateBitmap(CanvasDevice device, DirectXPixelFormat format, CanvasAlphaMode alphaMode)
{
ValidateUnsupportedPixelFormatException(() =>
{
CanvasBitmap.CreateFromBytes(device, new byte[1024], 4, 4, format, 96, alphaMode);
});
}