public DisplayListDrawingContext(
Flattener flattener,
double opacity,
BrushProxy opacityMask,
Matrix trans,
Geometry clip)
{
_flattener = flattener;
_opacity = opacity;
_opacityMask = opacityMask;
_transform = trans;
_clip = clip;
}
/// <summary>
/// Start Tree/alpha flattening and send result to ILegacyDevice interface
/// </summary>
public void FlushPage(ILegacyDevice sink, double width, double height, Nullable <OutputQuality> outputQuality)
{
AssertState(DeviceState.PageStarted, DeviceState.DocStarted);
if (_stack.Count != 0)
{
throw new InvalidOperationException();
}
if (sink != null)
{
Flattener.Convert(_root, sink, width, height, 96, 96, outputQuality);
}
}
/// <summary>
/// Flatten the structure of a primitive tree by push clip/transform/opacity onto each leaf node.
/// Build an index in a DisplayList.
/// </summary>
/// <param name="tree"></param>
/// <param name="clip"></param>
/// <param name="transform"></param>
/// <param name="opacity"></param>
/// <param name="opacityMask"></param>
public void TreeFlatten(Primitive tree, Geometry clip, Matrix transform, double opacity, BrushProxy opacityMask)
{
More:
if (tree == null)
{
return;
}
Debug.Assert(Utility.IsValid(opacity) && Utility.IsValid(tree.Opacity), "Invalid opacity encountered, should've been normalized in conversion to Primitive");
// Non-invertible transforms may arise from brush unfolding, where brush content is huge but
// we need to scale down significantly to fill target region. Allow such transforms.
CanvasPrimitive canvas = tree as CanvasPrimitive;
if (canvas != null)
{
ArrayList children = canvas.Children;
// No children, nothing to do
if ((children == null) || (children.Count == 0))
{
return;
}
opacity *= tree.Opacity;
// transform opacity mask into current primitive space
if (opacityMask != null)
{
Matrix worldToPrimitiveTransform = tree.Transform;
worldToPrimitiveTransform.Invert();
opacityMask.ApplyTransform(worldToPrimitiveTransform);
}
opacityMask = BrushProxy.BlendBrush(opacityMask, tree.OpacityMask);
// Skip the subtree if it's transparent enough
if (Utility.IsTransparent(opacity))
{
return;
}
transform = tree.Transform * transform;
Geometry transclip = Utility.TransformGeometry(tree.Clip, transform);
bool empty;
clip = Utility.Intersect(clip, transclip, Matrix.Identity, out empty);
if (empty)
{
return;
}
// For single child, just push transform/clip/opacity onto it.
if (children.Count == 1)
{
tree = children[0] as Primitive;
// Save a recursive call
goto More;
}
if (Configuration.BlendAlphaWithWhite || Configuration.ForceAlphaOpaque ||
(Utility.IsOpaque(opacity) && (opacityMask == null))) // For opaque subtree, just push trasform/clip into it.
{
foreach (Primitive p in children)
{
TreeFlatten(p, clip, transform, opacity, opacityMask);
}
}
else
{
// A semi-transparent sub-tree with more than one child
Flattener fl = new Flattener(true, _dl.m_width, _dl.m_height);
Primitive ntree = tree;
ntree.Clip = null;
ntree.Transform = Matrix.Identity;
ntree.Opacity = 1.0;
ntree.OpacityMask = null;
#if DEBUG
if (Configuration.Verbose >= 2)
{
Console.WriteLine("TreeFlatten for subtree");
}
#endif
if (opacityMask != null)
{
opacityMask.ApplyTransform(transform);
}
// Flatten sub-tree structure into a new DisplayList
fl.TreeFlatten(ntree, clip, transform, 1.0, null);
// Remove alpha in the sub-tree and add to the current display list
#if DEBUG
if (Configuration.Verbose >= 2)
{
Console.WriteLine("end TreeFlatten for subtree");
Console.WriteLine("AlphaFlatten for subtree");
}
#endif
fl.AlphaFlatten(new DisplayListDrawingContext(this, opacity, opacityMask, Matrix.Identity, null), true);
#if DEBUG
if (Configuration.Verbose >= 2)
{
Console.WriteLine("end AlphaFlatten for subtree");
}
#endif
}
}
else
{
GeometryPrimitive gp = tree as GeometryPrimitive;
if (gp != null && gp.Brush != null && gp.Pen != null &&
(!gp.IsOpaque || !Utility.IsOpaque(opacity)))
{
//
// As an optimization we split fill from stroke, however doing so requires
// an intermediate canvas to handle translucent fill/stroke, otherwise
// the translucent stroke and fill will overlap.
//
CanvasPrimitive splitCanvas = new CanvasPrimitive();
GeometryPrimitive fill = (GeometryPrimitive)gp;
GeometryPrimitive stroke = (GeometryPrimitive)gp.Clone();
fill.Pen = null;
stroke.Brush = null;
splitCanvas.Children.Add(fill);
splitCanvas.Children.Add(stroke);
tree = splitCanvas;
goto More;
}
// Push transform/clip/opacity to leaf node
tree.Transform = tree.Transform * transform;
if (tree.Clip == null)
{
tree.Clip = clip;
}
else
{
Geometry transclip = Utility.TransformGeometry(tree.Clip, transform);
bool empty;
tree.Clip = Utility.Intersect(transclip, clip, Matrix.Identity, out empty);
if (!empty)
{
empty = Utility.IsEmpty(tree.Clip, Matrix.Identity);
}
if (empty)
{
return;
}
}
tree.PushOpacity(opacity, opacityMask);
if (gp != null)
{
// Split fill and stroke into separate primitives if no opacity involved.
// Intermediate Canvas not needed due to opaqueness.
if ((gp.Brush != null) && (gp.Pen != null))
{
GeometryPrimitive fill = gp.Clone() as GeometryPrimitive;
fill.Pen = null;
AddPrimitive(fill); // Fill only first
// Stroke is flattend to fill only when needed
gp.Brush = null;
AddPrimitive(gp); // Followed by stroke only
}
else if ((gp.Pen != null) || (gp.Brush != null))
{
AddPrimitive(gp);
}
}
else
{
// Record it
AddPrimitive(tree);
}
}
}
/// <summary>
/// Flatten Primitive to ILegacyDevice
/// </summary>
public static void Convert(Primitive tree, ILegacyDevice dc, double width, double height, double dpix, double dpiy,
Nullable <OutputQuality> quality)
{
// Change Flattener quality setting based on OutputQualityValue
if (quality != null)
{
switch (quality)
{
case OutputQuality.Unknown:
case OutputQuality.Automatic:
break;
case OutputQuality.Draft:
case OutputQuality.Fax:
case OutputQuality.Text:
Configuration.RasterizationDPI = 96;
Configuration.MaximumTransparencyLayer = 8;
Configuration.GradientDecompositionDensity = 0.75;
Configuration.DecompositionDepth = 2;
break;
case OutputQuality.Normal:
Configuration.RasterizationDPI = 150;
Configuration.MaximumTransparencyLayer = 12;
Configuration.GradientDecompositionDensity = 1;
Configuration.DecompositionDepth = 3;
break;
case OutputQuality.High:
Configuration.RasterizationDPI = 300;
Configuration.MaximumTransparencyLayer = 16;
Configuration.GradientDecompositionDensity = 1.25;
Configuration.DecompositionDepth = 4;
break;
case OutputQuality.Photographic:
uint dcDpi = Math.Max(PrintQueue.GetDpiX(dc), PrintQueue.GetDpiY(dc));
Configuration.RasterizationDPI = (int)(Math.Max(dcDpi, 300));
Configuration.MaximumTransparencyLayer = 16;
Configuration.GradientDecompositionDensity = 1.25;
Configuration.DecompositionDepth = 4;
break;
}
}
#if DEBUG
if (Configuration.Verbose >= 2)
{
Console.WriteLine();
Console.WriteLine("\r\nStage 1: Tree Flattening");
Console.WriteLine();
}
#endif
// Paper dimension as clipping
Geometry clip = null;
if ((width != 0) && (height != 0))
{
clip = new RectangleGeometry(new Rect(0, 0, width, height));
}
// Transform to device resolution
Matrix transform = Matrix.Identity;
transform.Scale(dpix / 96, dpiy / 96);
Flattener fl = new Flattener(false, width, height);
Toolbox.EmitEvent(EventTrace.Event.WClientDRXTreeFlattenBegin);
fl.TreeFlatten(tree, clip, transform, 1.0, null);
Toolbox.EmitEvent(EventTrace.Event.WClientDRXTreeFlattenEnd);
Toolbox.EmitEvent(EventTrace.Event.WClientDRXAlphaFlattenBegin);
fl.AlphaFlatten(new BrushProxyDecomposer(dc), false);
Toolbox.EmitEvent(EventTrace.Event.WClientDRXAlphaFlattenEnd);
#if DEBUG
if (Configuration.Verbose >= 2)
{
Console.WriteLine();
Console.WriteLine("End AlphaFlattening");
Console.WriteLine();
}
#endif
}