/// <summary>
/// Creates paint wrapper for given brush.
/// </summary>
/// <param name="brush">Source brush.</param>
/// <param name="targetSize">Target size.</param>
/// <returns>Paint wrapper for given brush.</returns>
internal PaintWrapper CreatePaint(IBrush brush, Size targetSize)
{
var paint = new SKPaint
{
IsAntialias = true
};
var paintWrapper = new PaintWrapper(paint);
double opacity = brush.Opacity * _currentOpacity;
if (brush is ISolidColorBrush solid)
{
paint.Color = new SKColor(solid.Color.R, solid.Color.G, solid.Color.B, (byte)(solid.Color.A * opacity));
return(paintWrapper);
}
paint.Color = new SKColor(255, 255, 255, (byte)(255 * opacity));
if (brush is IGradientBrush gradient)
{
ConfigureGradientBrush(ref paintWrapper, targetSize, gradient);
return(paintWrapper);
}
var tileBrush = brush as ITileBrush;
var visualBrush = brush as IVisualBrush;
var tileBrushImage = default(IDrawableBitmapImpl);
if (visualBrush != null)
{
ConfigureVisualBrush(ref paintWrapper, visualBrush, _visualBrushRenderer, ref tileBrushImage);
}
else
{
tileBrushImage = (IDrawableBitmapImpl)(tileBrush as IImageBrush)?.Source?.PlatformImpl.Item;
}
if (tileBrush != null && tileBrushImage != null)
{
ConfigureTileBrush(ref paintWrapper, targetSize, tileBrush, tileBrushImage);
}
else
{
paint.Color = new SKColor(255, 255, 255, 0);
}
return(paintWrapper);
}
/// <summary>
/// Configure paint wrapper for using tile brush.
/// </summary>
/// <param name="paintWrapper">Paint wrapper.</param>
/// <param name="targetSize">Target size.</param>
/// <param name="tileBrush">Tile brush to use.</param>
/// <param name="tileBrushImage">Tile brush image.</param>
/// <param name="interpolationMode">The bitmap interpolation mode.</param>
private void ConfigureTileBrush(ref PaintWrapper paintWrapper, Size targetSize, ITileBrush tileBrush, IDrawableBitmapImpl tileBrushImage)
{
var calc = new TileBrushCalculator(tileBrush,
new Size(tileBrushImage.PixelSize.Width, tileBrushImage.PixelSize.Height), targetSize);
var intermediate = CreateRenderTarget(
(int)calc.IntermediateSize.Width,
(int)calc.IntermediateSize.Height, _dpi);
paintWrapper.AddDisposable(intermediate);
using (var context = intermediate.CreateDrawingContext(null))
{
var rect = new Rect(0, 0, tileBrushImage.PixelSize.Width, tileBrushImage.PixelSize.Height);
context.Clear(Colors.Transparent);
context.PushClip(calc.IntermediateClip);
context.Transform = calc.IntermediateTransform;
context.DrawImage(RefCountable.CreateUnownedNotClonable(tileBrushImage), 1, rect, rect, tileBrush.BitmapInterpolationMode);
context.PopClip();
}
var tileTransform =
tileBrush.TileMode != TileMode.None
? SKMatrix.MakeTranslation(-(float)calc.DestinationRect.X, -(float)calc.DestinationRect.Y)
: SKMatrix.MakeIdentity();
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;
var image = intermediate.SnapshotImage();
paintWrapper.AddDisposable(image);
using (var shader = image.ToShader(tileX, tileY, tileTransform))
{
paintWrapper.Paint.Shader = shader;
}
}
internal PaintWrapper CreateAcrylicPaint(SKPaint paint, IExperimentalAcrylicMaterial material, bool disposePaint = false)
{
var paintWrapper = new PaintWrapper(paint, disposePaint);
paint.IsAntialias = true;
double opacity = _currentOpacity;
var tintOpacity =
material.BackgroundSource == AcrylicBackgroundSource.Digger ?
material.TintOpacity : 1;
const double noiseOpcity = 0.0225;
var tintColor = material.TintColor;
var tint = new SKColor(tintColor.R, tintColor.G, tintColor.B, tintColor.A);
if (s_acrylicNoiseShader == null)
{
using (var stream = typeof(DrawingContextImpl).Assembly.GetManifestResourceStream("Avalonia.Skia.Assets.NoiseAsset_256X256_PNG.png"))
using (var bitmap = SKBitmap.Decode(stream))
{
s_acrylicNoiseShader = SKShader.CreateBitmap(bitmap, SKShaderTileMode.Repeat, SKShaderTileMode.Repeat)
.WithColorFilter(CreateAlphaColorFilter(noiseOpcity));
}
}
using (var backdrop = SKShader.CreateColor(new SKColor(material.MaterialColor.R, material.MaterialColor.G, material.MaterialColor.B, material.MaterialColor.A)))
using (var tintShader = SKShader.CreateColor(tint))
using (var effectiveTint = SKShader.CreateCompose(backdrop, tintShader))
using (var compose = SKShader.CreateCompose(effectiveTint, s_acrylicNoiseShader))
{
paint.Shader = compose;
if (material.BackgroundSource == AcrylicBackgroundSource.Digger)
{
paint.BlendMode = SKBlendMode.Src;
}
return(paintWrapper);
}
}
/// <summary>
/// Configure paint wrapper for using gradient brush.
/// </summary>
/// <param name="paintWrapper">Paint wrapper.</param>
/// <param name="targetSize">Target size.</param>
/// <param name="gradientBrush">Gradient brush.</param>
private void ConfigureGradientBrush(ref PaintWrapper paintWrapper, Size targetSize, IGradientBrush gradientBrush)
{
var tileMode = gradientBrush.SpreadMethod.ToSKShaderTileMode();
var stopColors = gradientBrush.GradientStops.Select(s => s.Color.ToSKColor()).ToArray();
var stopOffsets = gradientBrush.GradientStops.Select(s => (float)s.Offset).ToArray();
switch (gradientBrush)
{
case ILinearGradientBrush linearGradient:
{
var start = linearGradient.StartPoint.ToPixels(targetSize).ToSKPoint();
var end = linearGradient.EndPoint.ToPixels(targetSize).ToSKPoint();
// would be nice to cache these shaders possibly?
using (var shader =
SKShader.CreateLinearGradient(start, end, stopColors, stopOffsets, tileMode))
{
paintWrapper.Paint.Shader = shader;
}
break;
}
case IRadialGradientBrush radialGradient:
{
var center = radialGradient.Center.ToPixels(targetSize).ToSKPoint();
var radius = (float)(radialGradient.Radius * targetSize.Width);
// TODO: There is no SetAlpha in SkiaSharp
//paint.setAlpha(128);
// would be nice to cache these shaders possibly?
using (var shader =
SKShader.CreateRadialGradient(center, radius, stopColors, stopOffsets, tileMode))
{
paintWrapper.Paint.Shader = shader;
}
break;
}
}
}
/// <summary>
/// Configure paint wrapper to use visual brush.
/// </summary>
/// <param name="paintWrapper">Paint wrapper.</param>
/// <param name="visualBrush">Visual brush.</param>
/// <param name="visualBrushRenderer">Visual brush renderer.</param>
/// <param name="tileBrushImage">Tile brush image.</param>
private void ConfigureVisualBrush(ref PaintWrapper paintWrapper, IVisualBrush visualBrush, IVisualBrushRenderer visualBrushRenderer, ref IDrawableBitmapImpl tileBrushImage)
{
if (_visualBrushRenderer == null)
{
throw new NotSupportedException("No IVisualBrushRenderer was supplied to DrawingContextImpl.");
}
var intermediateSize = visualBrushRenderer.GetRenderTargetSize(visualBrush);
if (intermediateSize.Width >= 1 && intermediateSize.Height >= 1)
{
var intermediate = CreateRenderTarget(intermediateSize);
using (var ctx = intermediate.CreateDrawingContext(visualBrushRenderer))
{
ctx.Clear(Colors.Transparent);
visualBrushRenderer.RenderVisualBrush(ctx, visualBrush);
}
tileBrushImage = intermediate;
paintWrapper.AddDisposable(tileBrushImage);
}
}
internal 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 ISolidColorBrush;
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;
}
internal PaintWrapper CreatePaint(IBrush brush, Size targetSize)
{
SKPaint paint = new SKPaint();
var rv = new PaintWrapper(paint);
paint.IsStroke = false;
double opacity = brush.Opacity * _currentOpacity;
paint.IsAntialias = true;
var solid = brush as ISolidColorBrush;
if (solid != null)
{
paint.Color = new SKColor(solid.Color.R, solid.Color.G, solid.Color.B, (byte)(solid.Color.A * opacity));
return(rv);
}
paint.Color = (new SKColor(255, 255, 255, (byte)(255 * opacity)));
var gradient = brush as IGradientBrush;
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 ILinearGradientBrush;
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?
using (var shader = SKShader.CreateLinearGradient(start, end, stopColors, stopOffsets, tileMode))
paint.Shader = shader;
}
else
{
var radialGradient = brush as IRadialGradientBrush;
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?
using (var shader = SKShader.CreateRadialGradient(center, radius, stopColors, stopOffsets, tileMode))
paint.Shader = shader;
}
}
return(rv);
}
var tileBrush = brush as ITileBrush;
var visualBrush = brush as IVisualBrush;
var tileBrushImage = default(BitmapImpl);
if (visualBrush != null)
{
if (_visualBrushRenderer != null)
{
var intermediateSize = _visualBrushRenderer.GetRenderTargetSize(visualBrush);
if (intermediateSize.Width >= 1 && intermediateSize.Height >= 1)
{
var intermediate = new BitmapImpl((int)intermediateSize.Width, (int)intermediateSize.Height);
using (var ctx = intermediate.CreateDrawingContext(_visualBrushRenderer))
{
ctx.Clear(Colors.Transparent);
_visualBrushRenderer.RenderVisualBrush(ctx, visualBrush);
}
rv.AddDisposable(tileBrushImage);
tileBrushImage = intermediate;
}
}
else
{
throw new NotSupportedException("No IVisualBrushRenderer was supplied to DrawingContextImpl.");
}
}
else
{
tileBrushImage = (BitmapImpl)((tileBrush as IImageBrush)?.Source?.PlatformImpl);
}
if (tileBrush != null && tileBrushImage != null)
{
var calc = new TileBrushCalculator(tileBrush, new Size(tileBrushImage.PixelWidth, tileBrushImage.PixelHeight), targetSize);
var bitmap = new BitmapImpl((int)calc.IntermediateSize.Width, (int)calc.IntermediateSize.Height);
rv.AddDisposable(bitmap);
using (var context = bitmap.CreateDrawingContext(null))
{
var rect = new Rect(0, 0, tileBrushImage.PixelWidth, tileBrushImage.PixelHeight);
context.Clear(Colors.Transparent);
context.PushClip(calc.IntermediateClip);
context.Transform = calc.IntermediateTransform;
context.DrawImage(tileBrushImage, 1, rect, rect);
context.PopClip();
}
SKMatrix translation = SKMatrix.MakeTranslation(-(float)calc.DestinationRect.X, -(float)calc.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;
using (var shader = SKShader.CreateBitmap(bitmap.Bitmap, tileX, tileY, translation))
paint.Shader = shader;
}
return(rv);
}
/// <summary>
/// Configure paint wrapper for using gradient brush.
/// </summary>
/// <param name="paintWrapper">Paint wrapper.</param>
/// <param name="targetSize">Target size.</param>
/// <param name="gradientBrush">Gradient brush.</param>
private void ConfigureGradientBrush(ref PaintWrapper paintWrapper, Size targetSize, IGradientBrush gradientBrush)
{
var tileMode = gradientBrush.SpreadMethod.ToSKShaderTileMode();
var stopColors = gradientBrush.GradientStops.Select(s => s.Color.ToSKColor()).ToArray();
var stopOffsets = gradientBrush.GradientStops.Select(s => (float)s.Offset).ToArray();
switch (gradientBrush)
{
case ILinearGradientBrush linearGradient:
{
var start = linearGradient.StartPoint.ToPixels(targetSize).ToSKPoint();
var end = linearGradient.EndPoint.ToPixels(targetSize).ToSKPoint();
// would be nice to cache these shaders possibly?
using (var shader =
SKShader.CreateLinearGradient(start, end, stopColors, stopOffsets, tileMode))
{
paintWrapper.Paint.Shader = shader;
}
break;
}
case IRadialGradientBrush radialGradient:
{
var center = radialGradient.Center.ToPixels(targetSize).ToSKPoint();
var radius = (float)(radialGradient.Radius * targetSize.Width);
var origin = radialGradient.GradientOrigin.ToPixels(targetSize).ToSKPoint();
if (origin.Equals(center))
{
// when the origin is the same as the center the Skia RadialGradient acts the same as D2D
using (var shader =
SKShader.CreateRadialGradient(center, radius, stopColors, stopOffsets, tileMode))
{
paintWrapper.Paint.Shader = shader;
}
}
else
{
// when the origin is different to the center use a two point ConicalGradient to match the behaviour of D2D
// reverse the order of the stops to match D2D
var reversedColors = new SKColor[stopColors.Length];
Array.Copy(stopColors, reversedColors, stopColors.Length);
Array.Reverse(reversedColors);
// and then reverse the reference point of the stops
var reversedStops = new float[stopOffsets.Length];
for (var i = 0; i < stopOffsets.Length; i++)
{
reversedStops[i] = stopOffsets[i];
if (reversedStops[i] > 0 && reversedStops[i] < 1)
{
reversedStops[i] = Math.Abs(1 - stopOffsets[i]);
}
}
// compose with a background colour of the final stop to match D2D's behaviour of filling with the final color
using (var shader = SKShader.CreateCompose(
SKShader.CreateColor(reversedColors[0]),
SKShader.CreateTwoPointConicalGradient(center, radius, origin, 0, reversedColors, reversedStops, tileMode)
))
{
paintWrapper.Paint.Shader = shader;
}
}
break;
}
case IConicGradientBrush conicGradient:
{
var center = conicGradient.Center.ToPixels(targetSize).ToSKPoint();
// Skia's default is that angle 0 is from the right hand side of the center point
// but we are matching CSS where the vertical point above the center is 0.
var angle = (float)(conicGradient.Angle - 90);
var rotation = SKMatrix.CreateRotationDegrees(angle, center.X, center.Y);
using (var shader =
SKShader.CreateSweepGradient(center, stopColors, stopOffsets, rotation))
{
paintWrapper.Paint.Shader = shader;
}
break;
}
}
}
internal 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 ISolidColorBrush;
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?
using (var shader = SKShader.CreateLinearGradient(start, end, stopColors, stopOffsets, tileMode))
paint.Shader = shader;
}
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?
using (var shader = SKShader.CreateRadialGradient(center, radius, stopColors, stopOffsets, tileMode))
paint.Shader = shader;
}
}
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;
using (var shader = SKShader.CreateBitmap(bitmap.Bitmap, tileX, tileY, translation))
paint.Shader = shader;
}
return(rv);
}
