public ImageBrushImpl(
ImageBrush brush,
SharpDX.Direct2D1.RenderTarget target,
Size targetSize)
{
if (brush.Source == null)
{
return;
}
var image = ((BitmapImpl)brush.Source.PlatformImpl).GetDirect2DBitmap(target);
var imageSize = new Size(brush.Source.PixelWidth, brush.Source.PixelHeight);
var tileMode = brush.TileMode;
var sourceRect = brush.SourceRect.ToPixels(imageSize);
var destinationRect = brush.DestinationRect.ToPixels(targetSize);
var scale = brush.Stretch.CalculateScaling(destinationRect.Size, sourceRect.Size);
var translate = CalculateTranslate(brush, sourceRect, destinationRect, scale);
var intermediateSize = CalculateIntermediateSize(tileMode, targetSize, destinationRect.Size);
var brtOpts = CompatibleRenderTargetOptions.None;
// TODO: There are times where we don't need to draw an intermediate bitmap. Identify
// them and directly use 'image' in those cases.
using (var intermediate = new BitmapRenderTarget(target, brtOpts, intermediateSize))
{
Rect drawRect;
var transform = CalculateIntermediateTransform(
tileMode,
sourceRect,
destinationRect,
scale,
translate,
out drawRect);
intermediate.BeginDraw();
intermediate.PushAxisAlignedClip(drawRect.ToDirect2D(), AntialiasMode.Aliased);
intermediate.Transform = transform.ToDirect2D();
intermediate.DrawBitmap(image, 1, BitmapInterpolationMode.Linear);
intermediate.PopAxisAlignedClip();
intermediate.EndDraw();
this.PlatformBrush = new BitmapBrush(
target,
intermediate.Bitmap,
GetBitmapBrushProperties(brush),
GetBrushProperties(brush, destinationRect));
}
}
