unsafe NativeBrushContainer CreateBrush(Brush brush, Size targetSize)
{
var rv = NativeBrushPool.Instance.Get();
rv.Brush->Opacity = brush.Opacity;
var solid = brush as SolidColorBrush;
if (solid != null)
{
rv.Brush->Type = NativeBrushType.Solid;
rv.Brush->Color = solid.Color.ToUint32();
return(rv);
}
var gradient = brush as GradientBrush;
if (gradient != null)
{
if (gradient.GradientStops.Count > NativeBrush.MaxGradientStops)
{
throw new NotSupportedException("Maximum supported gradient stop count is " +
NativeBrush.MaxGradientStops);
}
rv.Brush->GradientSpreadMethod = gradient.SpreadMethod;
rv.Brush->GradientStopCount = gradient.GradientStops.Count;
for (var c = 0; c < gradient.GradientStops.Count; c++)
{
var st = gradient.GradientStops[c];
rv.Brush->GradientStops[c] = (float)st.Offset;
rv.Brush->GradientStopColors[c] = st.Color.ToUint32();
}
}
var linearGradient = brush as LinearGradientBrush;
if (linearGradient != null)
{
rv.Brush->Type = NativeBrushType.LinearGradient;
rv.Brush->GradientStartPoint = linearGradient.StartPoint.ToPixels(targetSize);
rv.Brush->GradientEndPoint = linearGradient.EndPoint.ToPixels(targetSize);
}
var radialGradient = brush as RadialGradientBrush;
if (radialGradient != null)
{
rv.Brush->Type = NativeBrushType.RadialGradient;
rv.Brush->GradientStartPoint = radialGradient.Center.ToPixels(targetSize);
rv.Brush->GradientRadius = (float)radialGradient.Radius;
}
var tileBrush = brush as TileBrush;
if (tileBrush != null)
{
rv.Brush->Type = NativeBrushType.Image;
var helper = new TileBrushImplHelper(tileBrush, targetSize);
var bitmap = new BitmapImpl((int)helper.IntermediateSize.Width, (int)helper.IntermediateSize.Height);
rv.AddDisposable(bitmap);
using (var ctx = bitmap.CreateDrawingContext())
helper.DrawIntermediate(ctx);
rv.Brush->Bitmap = bitmap.Handle;
rv.Brush->BitmapTileMode = tileBrush.TileMode;
rv.Brush->BitmapTranslation = new SkiaPoint(-helper.DestinationRect.X, -helper.DestinationRect.Y);
}
return(rv);
}
unsafe NativeBrushContainer CreateBrush(Brush brush, Size targetSize)
{
var rv = NativeBrushPool.Instance.Get();
rv.Brush->Opacity = brush.Opacity;
var solid = brush as SolidColorBrush;
if (solid != null)
{
rv.Brush->Type = NativeBrushType.Solid;
rv.Brush->Color = solid.Color.ToUint32();
return rv;
}
var gradient = brush as GradientBrush;
if (gradient != null)
{
if (gradient.GradientStops.Count > NativeBrush.MaxGradientStops)
throw new NotSupportedException("Maximum supported gradient stop count is " +
NativeBrush.MaxGradientStops);
rv.Brush->GradientSpreadMethod = gradient.SpreadMethod;
rv.Brush->GradientStopCount = gradient.GradientStops.Count;
for (var c = 0; c < gradient.GradientStops.Count; c++)
{
var st = gradient.GradientStops[c];
rv.Brush->GradientStops[c] = (float) st.Offset;
rv.Brush->GradientStopColors[c] = st.Color.ToUint32();
}
}
var linearGradient = brush as LinearGradientBrush;
if (linearGradient != null)
{
rv.Brush->Type = NativeBrushType.LinearGradient;
rv.Brush->GradientStartPoint = linearGradient.StartPoint.ToPixels(targetSize);
rv.Brush->GradientEndPoint = linearGradient.EndPoint.ToPixels(targetSize);
}
var radialGradient = brush as RadialGradientBrush;
if (radialGradient != null)
{
rv.Brush->Type = NativeBrushType.RadialGradient;
rv.Brush->GradientStartPoint = radialGradient.Center.ToPixels(targetSize);
rv.Brush->GradientRadius = (float)radialGradient.Radius;
}
var tileBrush = brush as TileBrush;
if (tileBrush != null)
{
rv.Brush->Type = NativeBrushType.Image;
var helper = new TileBrushImplHelper(tileBrush, targetSize);
var bitmap = new BitmapImpl((int) helper.IntermediateSize.Width, (int) helper.IntermediateSize.Height);
rv.AddDisposable(bitmap);
using (var ctx = bitmap.CreateDrawingContext())
helper.DrawIntermediate(ctx);
rv.Brush->Bitmap = bitmap.Handle;
rv.Brush->BitmapTileMode = tileBrush.TileMode;
rv.Brush->BitmapTranslation = new SkiaPoint(-helper.DestinationRect.X, -helper.DestinationRect.Y);
}
return rv;
}
private PaintWrapper CreatePaint(IBrush brush, Size targetSize)
{
SKPaint paint = new SKPaint();
var rv = new PaintWrapper(paint);
paint.IsStroke = false;
// TODO: SkiaSharp does not contain alpha yet!
double opacity = brush.Opacity * _currentOpacity;
//paint.SetAlpha(paint.GetAlpha() * opacity);
paint.IsAntialias = true;
SKColor color = new SKColor(255, 255, 255, 255);
var solid = brush as SolidColorBrush;
if (solid != null)
{
color = solid.Color.ToSKColor();
}
paint.Color = (new SKColor(color.Red, color.Green, color.Blue, (byte)(color.Alpha * opacity)));
if (solid != null)
{
return(rv);
}
var gradient = brush as GradientBrush;
if (gradient != null)
{
var tileMode = gradient.SpreadMethod.ToSKShaderTileMode();
var stopColors = gradient.GradientStops.Select(s => s.Color.ToSKColor()).ToArray();
var stopOffsets = gradient.GradientStops.Select(s => (float)s.Offset).ToArray();
var linearGradient = brush as LinearGradientBrush;
if (linearGradient != null)
{
var start = linearGradient.StartPoint.ToPixels(targetSize).ToSKPoint();
var end = linearGradient.EndPoint.ToPixels(targetSize).ToSKPoint();
// would be nice to cache these shaders possibly?
var shader = SKShader.CreateLinearGradient(start, end, stopColors, stopOffsets, tileMode);
paint.Shader = shader;
shader.Dispose();
}
else
{
var radialGradient = brush as RadialGradientBrush;
if (radialGradient != null)
{
var center = radialGradient.Center.ToPixels(targetSize).ToSKPoint();
var radius = (float)radialGradient.Radius;
// TODO: There is no SetAlpha in SkiaSharp
//paint.setAlpha(128);
// would be nice to cache these shaders possibly?
var shader = SKShader.CreateRadialGradient(center, radius, stopColors, stopOffsets, tileMode);
paint.Shader = shader;
shader.Dispose();
}
}
return(rv);
}
var tileBrush = brush as TileBrush;
if (tileBrush != null)
{
var helper = new TileBrushImplHelper(tileBrush, targetSize);
var bitmap = new BitmapImpl((int)helper.IntermediateSize.Width, (int)helper.IntermediateSize.Height);
rv.AddDisposable(bitmap);
using (var ctx = bitmap.CreateDrawingContext())
helper.DrawIntermediate(ctx);
SKMatrix translation = SKMatrix.MakeTranslation(-(float)helper.DestinationRect.X, -(float)helper.DestinationRect.Y);
SKShaderTileMode tileX =
tileBrush.TileMode == TileMode.None
? SKShaderTileMode.Clamp
: tileBrush.TileMode == TileMode.FlipX || tileBrush.TileMode == TileMode.FlipXY
? SKShaderTileMode.Mirror
: SKShaderTileMode.Repeat;
SKShaderTileMode tileY =
tileBrush.TileMode == TileMode.None
? SKShaderTileMode.Clamp
: tileBrush.TileMode == TileMode.FlipY || tileBrush.TileMode == TileMode.FlipXY
? SKShaderTileMode.Mirror
: SKShaderTileMode.Repeat;
paint.Shader = SKShader.CreateBitmap(bitmap.Bitmap, tileX, tileY, translation);
paint.Shader.Dispose();
}
return(rv);
}
