public static SurfacePattern CreateTileBrush(TileBrush brush, Size targetSize)
{
var helper = new TileBrushImplHelper(brush, targetSize);
if (!helper.IsValid)
return null;
using (var intermediate = new ImageSurface(Format.ARGB32, (int)helper.IntermediateSize.Width, (int)helper.IntermediateSize.Height))
using (var ctx = new RenderTarget(intermediate).CreateDrawingContext())
{
helper.DrawIntermediate(ctx);
var result = new SurfacePattern(intermediate);
if ((brush.TileMode & TileMode.FlipXY) != 0)
{
// TODO: Currently always FlipXY as that's all cairo supports natively.
// Support separate FlipX and FlipY by drawing flipped images to intermediate
// surface.
result.Extend = Extend.Reflect;
}
else
{
result.Extend = Extend.Repeat;
}
if (brush.TileMode != TileMode.None)
{
var matrix = result.Matrix;
matrix.InitTranslate(-helper.DestinationRect.X, -helper.DestinationRect.Y);
result.Matrix = matrix;
}
return result;
}
}
private static BitmapBrushProperties GetBitmapBrushProperties(TileBrush brush)
{
var tileMode = brush.TileMode;
return new BitmapBrushProperties
{
ExtendModeX = GetExtendModeX(tileMode),
ExtendModeY = GetExtendModeY(tileMode),
};
}
private static BrushProperties GetBrushProperties(TileBrush brush, Rect destinationRect)
{
var tileTransform =
brush.TileMode != TileMode.None ?
Matrix.CreateTranslation(destinationRect.X, destinationRect.Y) :
Matrix.Identity;
return new BrushProperties
{
Opacity = (float)brush.Opacity,
Transform = tileTransform.ToDirect2D(),
};
}
public TileBrushImpl(
TileBrush brush,
SharpDX.Direct2D1.RenderTarget target,
Size targetSize)
{
var helper = new TileBrushImplHelper(brush, targetSize);
if (!helper.IsValid)
return;
using (var intermediate = new BitmapRenderTarget(target, CompatibleRenderTargetOptions.None, helper.IntermediateSize.ToSharpDX()))
{
using (var ctx = new RenderTarget(intermediate).CreateDrawingContext())
{
intermediate.Clear(null);
helper.DrawIntermediate(ctx);
}
PlatformBrush = new BitmapBrush(
target,
intermediate.Bitmap,
GetBitmapBrushProperties(brush),
GetBrushProperties(brush, helper.DestinationRect));
}
}