protected override void Render(RenderTarget rt)
{
if (image == null)
{
base.Render(rt);
return;
}
rt.Clear(this.SceneColorBrush.Color);
rt.Transform = Matrix3x2.Identity;
Size2 imageSize = this.image.PixelSize;
double scale = Math.Min((double)(ClientSize.Width - ImagePadding) / imageSize.Width, (double)(ClientSize.Height - ImagePadding) / imageSize.Height);
int imageWidth = (int)(imageSize.Width * scale);
int imageHeight = (int)(imageSize.Height * scale);
var rcBounds = new RectangleF(0, 0, imageSize.Width, imageSize.Height);
var rcImage = new RectangleF((ClientSize.Width - imageWidth) / 2, (ClientSize.Height - imageHeight) / 2, imageWidth, imageHeight);
bool isBGRAImage = image.PixelFormat.Format == SharpDX.DXGI.Format.B8G8R8A8_UNorm;
if (!isBGRAImage)
{
var sz = new Size2F(imageSize.Width, imageSize.Height);
var rc = new RectangleF(0, 0, imageSize.Width, imageSize.Height);
if (bgraImageRenderer == null || bgraImageRenderer.Size != sz)
{
SharpDX.Utilities.Dispose(ref bgraImageRenderer);
bgraImageRenderer = new BitmapRenderTarget(RenderTarget2D, CompatibleRenderTargetOptions.None, sz);
}
bgraImageRenderer.BeginDraw();
bgraImageRenderer.Clear(Color.Black);
bgraImageRenderer.AntialiasMode = AntialiasMode.Aliased;
bgraImageRenderer.FillOpacityMask(this.image, whiteBrush, OpacityMaskContent.Graphics, rc, rc);
bgraImageRenderer.EndDraw();
}
rt.DrawBitmap(isBGRAImage ? image : bgraImageRenderer.Bitmap, rcImage, 1, BitmapInterpolationMode.NearestNeighbor, rcBounds);
if (ImagePadding != 0)
{
rt.DrawRectangle(rcImage, whiteBrush, 1);
}
}
