/// <summary>
/// Saves the project item as image to the provided stream.
/// </summary>
/// <param name="item">The item to export, for instance an item of type <see cref="Altaxo.Graph.Gdi.GraphDocument"/> or <see cref="Altaxo.Graph.Graph3D.GraphDocument"/>.</param>
/// <param name="options">The export options.</param>
/// <param name="toStream">The stream to save the image to.</param>
public void ExportAsImageToStream(Altaxo.Main.IProjectItem item, Altaxo.Graph.Gdi.GraphExportOptions options, System.IO.Stream toStream)
{
if (item == null)
throw new ArgumentNullException(nameof(item));
if (!(item is Altaxo.Graph.Graph3D.GraphDocument))
throw new ArgumentException(string.Format("Expected item of type {0}, but it is of type {1}", typeof(Altaxo.Graph.Graph3D.GraphDocument), item.GetType()));
var doc = (Altaxo.Graph.Graph3D.GraphDocument)item;
double sourceDpi = options.SourceDpiResolution;
var exporter = new D3D10BitmapExporter();
var scene = new Viewing.D3D10Scene();
var g = new D3D10GraphicsContext();
doc.Paint(g);
var matrix = doc.Camera.LookAtRHMatrix;
var rect = new RectangleD3D(PointD3D.Empty, doc.RootLayer.Size);
var bounds = RectangleD3D.NewRectangleIncludingAllPoints(rect.Vertices.Select(x => matrix.Transform(x)));
int pixelsX = (int)Math.Ceiling(sourceDpi * bounds.SizeX / 72.0);
pixelsX = (int)(4 * Math.Ceiling((pixelsX + 3) / 4.0));
int pixelsY = (int)(sourceDpi * bounds.SizeY / 72.0);
double aspectRatio = pixelsY / (double)pixelsX;
var sceneCamera = doc.Camera;
if (sceneCamera is OrthographicCamera)
{
var orthoCamera = (OrthographicCamera)sceneCamera;
orthoCamera = (OrthographicCamera)orthoCamera.WithWidthAtZNear(bounds.SizeX);
double offsX = -(1 + 2 * bounds.X / bounds.SizeX);
double offsY = -(1 + 2 * bounds.Y / bounds.SizeY);
sceneCamera = orthoCamera.WithScreenOffset(new PointD2D(offsX, offsY));
}
else if (sceneCamera is PerspectiveCamera)
{
var viewProj = sceneCamera.GetViewProjectionMatrix(1); // here we transform the points with AspectRatio=1, in order to get the AspectRatio of the ScreenBounds
var screenBounds = RectangleD3D.NewRectangleIncludingAllPoints(rect.Vertices.Select(x => viewProj.Transform(x)));
aspectRatio = screenBounds.SizeY / screenBounds.SizeX; // this is the aspectRatio of our image
viewProj = sceneCamera.GetViewProjectionMatrix(aspectRatio); // now we get the transform with our aspectRatio determined above
screenBounds = RectangleD3D.NewRectangleIncludingAllPoints(rect.Vertices.Select(x => viewProj.Transform(x))); // this are our actual screenBounds, of course in relative screen coordinates, thus the ratio of sizeX and sizeY should now be 1
double scaleFactor = 2 / screenBounds.SizeX; // since SizeX and SizeY should now be the same, we could have used SizeY alternatively
double offsX = -(1 + scaleFactor * screenBounds.X);
double offsY = -(1 + scaleFactor * screenBounds.Y);
pixelsY = (int)(4 * Math.Ceiling((aspectRatio * pixelsX + 3) / 4.0)); // now calculate the size of the image in y direction from the aspectRatio
var perspCamera = (PerspectiveCamera)sceneCamera;
sceneCamera = perspCamera.WithWidthAtZNear(perspCamera.WidthAtZNear / scaleFactor);
sceneCamera = sceneCamera.WithScreenOffset(new PointD2D(offsX, offsY));
}
else
{
throw new NotImplementedException();
}
scene.SetCamera(sceneCamera);
scene.SetLighting(doc.Lighting);
scene.SetDrawing(g);
exporter.Export(pixelsX, pixelsY, scene, options, toStream);
}
/// <summary>
/// Saves the project item as image to the provided stream.
/// </summary>
/// <param name="item">The item to export, for instance an item of type <see cref="Altaxo.Graph.Gdi.GraphDocument"/> or <see cref="Altaxo.Graph.Graph3D.GraphDocument"/>.</param>
/// <param name="options">The export options.</param>
/// <param name="toStream">The stream to save the image to.</param>
public (int PixelsX, int PixelsY) ExportAsImageToStream(Altaxo.Main.IProjectItem item, Altaxo.Graph.Gdi.GraphExportOptions options, System.IO.Stream toStream)
{
// SharpDX.Configuration.EnableObjectTracking = true;
// var listOfActiveObjects = SharpDX.Diagnostics.ObjectTracker.FindActiveObjects();
if (item == null)
{
throw new ArgumentNullException(nameof(item));
}
if (!(item is Altaxo.Graph.Graph3D.GraphDocument))
{
throw new ArgumentException(string.Format("Expected item of type {0}, but it is of type {1}", typeof(Altaxo.Graph.Graph3D.GraphDocument), item.GetType()));
}
var doc = (Altaxo.Graph.Graph3D.GraphDocument)item;
double sourceDpi = options.SourceDpiResolution;
Viewing.D3D10Scene scene = null;
D3D10GraphicsContext g = null;
try
{
scene = new Viewing.D3D10Scene();
g = new D3D10GraphicsContext();
doc.Paint(g);
var matrix = doc.Camera.LookAtRHMatrix;
var rect = new RectangleD3D(PointD3D.Empty, doc.RootLayer.Size);
var bounds = RectangleD3D.NewRectangleIncludingAllPoints(rect.Vertices.Select(x => matrix.Transform(x)));
int pixelsX = (int)Math.Ceiling(sourceDpi * bounds.SizeX / 72.0);
pixelsX = (int)(4 * Math.Ceiling((pixelsX + 3) / 4.0));
int pixelsY = (int)(sourceDpi * bounds.SizeY / 72.0);
double aspectRatio = pixelsY / (double)pixelsX;
var sceneCamera = doc.Camera;
if (sceneCamera is OrthographicCamera)
{
var orthoCamera = (OrthographicCamera)sceneCamera;
orthoCamera = (OrthographicCamera)orthoCamera.WithWidthAtZNear(bounds.SizeX);
double offsX = -(1 + 2 * bounds.X / bounds.SizeX);
double offsY = -(1 + 2 * bounds.Y / bounds.SizeY);
sceneCamera = orthoCamera.WithScreenOffset(new PointD2D(offsX, offsY));
}
else if (sceneCamera is PerspectiveCamera)
{
var viewProj = sceneCamera.GetViewProjectionMatrix(1); // here we transform the points with AspectRatio=1, in order to get the AspectRatio of the ScreenBounds
var screenBounds = RectangleD3D.NewRectangleIncludingAllPoints(rect.Vertices.Select(x => viewProj.Transform(x)));
aspectRatio = screenBounds.SizeY / screenBounds.SizeX; // this is the aspectRatio of our image
viewProj = sceneCamera.GetViewProjectionMatrix(aspectRatio); // now we get the transform with our aspectRatio determined above
screenBounds = RectangleD3D.NewRectangleIncludingAllPoints(rect.Vertices.Select(x => viewProj.Transform(x))); // this are our actual screenBounds, of course in relative screen coordinates, thus the ratio of sizeX and sizeY should now be 1
double scaleFactor = 2 / screenBounds.SizeX; // since SizeX and SizeY should now be the same, we could have used SizeY alternatively
double offsX = -(1 + scaleFactor * screenBounds.X);
double offsY = -(1 + scaleFactor * screenBounds.Y);
pixelsY = (int)(4 * Math.Ceiling((aspectRatio * pixelsX + 3) / 4.0)); // now calculate the size of the image in y direction from the aspectRatio
var perspCamera = (PerspectiveCamera)sceneCamera;
sceneCamera = perspCamera.WithWidthAtZNear(perspCamera.WidthAtZNear / scaleFactor);
sceneCamera = sceneCamera.WithScreenOffset(new PointD2D(offsX, offsY));
}
else
{
throw new NotImplementedException();
}
scene.SetCamera(sceneCamera);
scene.SetLighting(doc.Lighting);
scene.SetDrawing(g);
Export(pixelsX, pixelsY, scene, options, toStream);
return(pixelsX, pixelsY);
}
finally
{
Disposer.RemoveAndDispose(ref g);
Disposer.RemoveAndDispose(ref scene);
}
}
