void RenderD2DContentIntoSurface()
{
SizeF rtSize = renderTarget.Size;
renderTarget.BeginDraw();
if (!isOpacityRTPopulated)
{
opacityRenderTarget.BeginDraw();
opacityRenderTarget.Transform = Matrix3x2F.Identity;
opacityRenderTarget.Clear(new ColorF(GetColorValues(System.Windows.Media.Colors.Black), 0));
opacityRenderTarget.DrawText(
text,
textFormat,
new RectF(
0,
0,
rtSize.Width,
rtSize.Height
),
textBrush
);
opacityRenderTarget.EndDraw();
isOpacityRTPopulated = true;
}
renderTarget.Clear(new ColorF(GetColorValues(System.Windows.Media.Colors.Black)));
renderTarget.AntiAliasMode = AntiAliasMode.Aliased;
D2DBitmap spBitmap = opacityRenderTarget.Bitmap;
renderTarget.FillOpacityMask(
spBitmap,
textBrush,
OpacityMaskContent.TextNatural,
new RectF(0, 0, rtSize.Width, rtSize.Height),
new RectF(0, 0, rtSize.Width, rtSize.Height)
);
renderTarget.EndDraw();
}
