internal static GlowBitmap Create(GlowDrawingContext drawingContext, GlowBitmapPart bitmapPart, Color color)
{
var orCreateAlphaMask =
GetOrCreateAlphaMask(bitmapPart);
var glowBitmap =
new GlowBitmap(
drawingContext.ScreenDC,
orCreateAlphaMask.Width,
orCreateAlphaMask.Height);
for (var i = 0; i < orCreateAlphaMask.DIBits.Length; i += BytesPerPixelBgra32)
{
var b = orCreateAlphaMask.DIBits[i + 3];
var val = PremultiplyAlpha(color.R, b);
var val2 = PremultiplyAlpha(color.G, b);
var val3 = PremultiplyAlpha(color.B, b);
Marshal.WriteByte(glowBitmap.DIBits, i, val3);
Marshal.WriteByte(glowBitmap.DIBits, i + 1, val2);
Marshal.WriteByte(glowBitmap.DIBits, i + 2, val);
Marshal.WriteByte(glowBitmap.DIBits, i + 3, b);
}
return(glowBitmap);
}
public static RenderTargetBitmap GenerateBitmapSource(GlowBitmapPart part, int glowDepth, bool useRadialGradientForCorners)
{
var size = GetSize(part, glowDepth);
var drawingVisual = new DrawingVisual();
using (var drawingContext = drawingVisual.RenderOpen())
{
if (glowDepth > 1)
{
var gradientBrush = CreateGradientBrush(part, useRadialGradientForCorners);
gradientBrush.Freeze();
drawingContext.DrawRectangle(gradientBrush, null, new Rect(0, 0, size.Width, size.Height));
drawingContext.DrawRectangle(Brushes.Black, null, GetBlackRect(part, glowDepth));
}
else
{
drawingContext.DrawRectangle(Brushes.Black, null, new Rect(0, 0, size.Width, size.Height));
}
}
var targetBitmap = new RenderTargetBitmap((int)size.Width, (int)size.Height, 96, 96, PixelFormats.Pbgra32);
targetBitmap.Render(drawingVisual);
return(targetBitmap);
}
private static Size GetSize(GlowBitmapPart part, int glowDepth)
{
switch (part)
{
case GlowBitmapPart.CornerTopLeft:
case GlowBitmapPart.CornerTopRight:
case GlowBitmapPart.CornerBottomLeft:
case GlowBitmapPart.CornerBottomRight:
return(new Size(glowDepth, glowDepth));
case GlowBitmapPart.Top:
case GlowBitmapPart.Bottom:
return(new Size(1, glowDepth));
case GlowBitmapPart.TopLeft:
case GlowBitmapPart.TopRight:
case GlowBitmapPart.BottomLeft:
case GlowBitmapPart.BottomRight:
return(new Size(Math.Min(glowDepth, 6), glowDepth));
case GlowBitmapPart.Left:
case GlowBitmapPart.Right:
return(new Size(glowDepth, 1));
case GlowBitmapPart.LeftTop:
case GlowBitmapPart.LeftBottom:
case GlowBitmapPart.RightTop:
case GlowBitmapPart.RightBottom:
return(new Size(glowDepth, Math.Min(glowDepth, 6)));
default:
throw new ArgumentOutOfRangeException(nameof(part), part, null);
}
}
private static StartAndEndPoint GetStartAndEndPoint(GlowBitmapPart part)
{
switch (part)
{
case GlowBitmapPart.CornerTopLeft:
return(new(new Point(1, 1), new Point(0, 0)));
case GlowBitmapPart.CornerTopRight:
return(new(new Point(0, 1), new Point(1, 0)));
case GlowBitmapPart.CornerBottomLeft:
return(new(new Point(1, 0), new Point(0, 1)));
case GlowBitmapPart.CornerBottomRight:
return(new(new Point(0, 0), new Point(1, 1)));
case GlowBitmapPart.TopLeft:
return(new(new Point(0.6, 1), new Point(0.5, 0)));
case GlowBitmapPart.Top:
return(new(new Point(0.5, 1), new Point(0.5, 0)));
case GlowBitmapPart.TopRight:
return(new(new Point(0.4, 1), new Point(0.5, 0)));
case GlowBitmapPart.LeftTop:
return(new(new Point(1, 0.1), new Point(0, 0)));
case GlowBitmapPart.Left:
return(new(new Point(1, 0), new Point(0, 0)));
case GlowBitmapPart.LeftBottom:
return(new(new Point(1, 0), new Point(0, 0.1)));
case GlowBitmapPart.BottomLeft:
return(new(new Point(0.6, 0), new Point(0.5, 1)));
case GlowBitmapPart.Bottom:
return(new(new Point(0.5, 0), new Point(0.5, 1)));
case GlowBitmapPart.BottomRight:
return(new(new Point(0.4, 0), new Point(0.5, 1)));
case GlowBitmapPart.RightTop:
return(new(new Point(0, 0.1), new Point(1, 0)));
case GlowBitmapPart.Right:
return(new(new Point(0, 0), new Point(1, 0)));
case GlowBitmapPart.RightBottom:
return(new(new Point(0, 0), new Point(1, 0.1)));
default:
throw new ArgumentOutOfRangeException(nameof(part), part, null);
}
}
private static GradientBrush CreateGradientBrush(GlowBitmapPart part, bool useRadialGradientForCorners)
{
var startAndEndPoint = GetStartAndEndPoint(part);
var gradientStops = GetGradientStops(part, useRadialGradientForCorners);
var gradientStopCollection = new GradientStopCollection(gradientStops);
if (useRadialGradientForCorners == false)
{
return(new LinearGradientBrush(gradientStopCollection, startAndEndPoint.Start, startAndEndPoint.End));
}
switch (part)
{
case GlowBitmapPart.CornerTopLeft:
case GlowBitmapPart.CornerTopRight:
case GlowBitmapPart.CornerBottomLeft:
case GlowBitmapPart.CornerBottomRight:
return(new RadialGradientBrush(gradientStopCollection)
{
GradientOrigin = startAndEndPoint.Start,
Center = new Point(startAndEndPoint.Start.X.AreClose(0) ? 0.2 : 0.8, startAndEndPoint.Start.Y.AreClose(0) ? 0.2 : 0.8),
RadiusX = 1,
RadiusY = 1
});
case GlowBitmapPart.TopLeft:
case GlowBitmapPart.Top:
case GlowBitmapPart.TopRight:
case GlowBitmapPart.LeftTop:
case GlowBitmapPart.Left:
case GlowBitmapPart.LeftBottom:
case GlowBitmapPart.BottomLeft:
case GlowBitmapPart.Bottom:
case GlowBitmapPart.BottomRight:
case GlowBitmapPart.RightTop:
case GlowBitmapPart.Right:
case GlowBitmapPart.RightBottom:
return(new LinearGradientBrush(gradientStopCollection, startAndEndPoint.Start, startAndEndPoint.End));
default:
throw new ArgumentOutOfRangeException(nameof(part), part, null);
}
}
private static CachedBitmapInfo GetOrCreateAlphaMask(GlowBitmapPart bitmapPart)
{
if (_transparencyMasks[(int)bitmapPart] == null)
{
var bitmapImage = new BitmapImage(new Uri($"pack://application:,,,/HandyControl;Component/Resources/Images/GlowWindow/{bitmapPart}.png"));
var array = new byte[BytesPerPixelBgra32 * bitmapImage.PixelWidth * bitmapImage.PixelHeight];
var stride = BytesPerPixelBgra32 * bitmapImage.PixelWidth;
bitmapImage.CopyPixels(array, stride, 0);
_transparencyMasks[(int)bitmapPart] =
new CachedBitmapInfo(
array,
bitmapImage.PixelWidth,
bitmapImage.PixelHeight);
}
return(_transparencyMasks[(int)bitmapPart]);
}
private static Rect GetBlackRect(GlowBitmapPart part, int glowDepth)
{
switch (part)
{
case GlowBitmapPart.CornerTopLeft:
return(new Rect(new Point(glowDepth - 1, glowDepth - 1), new Size(1, 1)));
case GlowBitmapPart.CornerTopRight:
return(new Rect(new Point(0, glowDepth - 1), new Size(1, 1)));
case GlowBitmapPart.CornerBottomLeft:
return(new Rect(new Point(glowDepth - 1, 0), new Size(1, 1)));
case GlowBitmapPart.CornerBottomRight:
return(new Rect(new Point(0, 0), new Size(1, 1)));
case GlowBitmapPart.TopLeft:
case GlowBitmapPart.Top:
case GlowBitmapPart.TopRight:
return(new Rect(new Point(0, glowDepth - 1), new Size(glowDepth, 1)));
case GlowBitmapPart.LeftTop:
case GlowBitmapPart.Left:
case GlowBitmapPart.LeftBottom:
return(new Rect(new Point(glowDepth - 1, 0), new Size(1, glowDepth)));
case GlowBitmapPart.BottomLeft:
case GlowBitmapPart.Bottom:
case GlowBitmapPart.BottomRight:
return(new Rect(new Point(0, 0), new Size(glowDepth, 1)));
case GlowBitmapPart.RightTop:
case GlowBitmapPart.Right:
case GlowBitmapPart.RightBottom:
return(new Rect(new Point(0, 0), new Size(1, glowDepth)));
default:
throw new ArgumentOutOfRangeException(nameof(part), part, null);
}
}
private static IEnumerable <GradientStop> GetGradientStops(GlowBitmapPart part, bool useRadialGradientForCorners)
{
switch (part)
{
case GlowBitmapPart.CornerBottomLeft:
case GlowBitmapPart.CornerBottomRight:
case GlowBitmapPart.CornerTopLeft:
case GlowBitmapPart.CornerTopRight:
if (useRadialGradientForCorners)
{
yield return(new GradientStop(ColorFromString("#55838383"), 0));
yield return(new GradientStop(ColorFromString("#02838383"), 0.5));
yield return(new GradientStop(ColorFromString("#00000000"), 1));
}
else
{
yield return(new GradientStop(ColorFromString("#55838383"), 0));
yield return(new GradientStop(ColorFromString("#02838383"), 0.3));
yield return(new GradientStop(ColorFromString("#00000000"), 1));
}
break;
default:
yield return(new GradientStop(ColorFromString("#55838383"), 0));
yield return(new GradientStop(ColorFromString("#02838383"), 0.6));
yield return(new GradientStop(ColorFromString("#00000000"), 1));
break;
}
}
