public bool tessellate(ref Options options, ref Rect clip, iPolylinePath poly, ref Guid hashFront)
{
eClipResult result = path.buildClippedPolylines(poly, clip, options.transform, options.precision, options.stroke.width);
clipResultBack = result;
if (result == eClipResult.ClippedOut)
{
return(clearBackBuffer());
}
Guid hash = poly.hash;
if (hash == hashFront)
{
// Same polyline was used to generate the current front buffer.
// Return false to skip buffers swap.
return(false);
}
if (hash == hashBack)
{
return(true);
}
hashBack = hash;
if (result == eClipResult.FillsEntireViewport)
{
var fillOptions = options.fill;
if (!fillOptions.HasFlag(eBuildFilledMesh.FilledMesh))
{
return(clearBackBuffer());
}
// When there're no visible edges of the path, no point in doing VAA, will be clipped out
fillOptions &= ~eBuildFilledMesh.VAA;
poly.createMesh(backBuffer, fillOptions, 0);
return(true);
}
if (options.stroke.width <= 0)
{
poly.createMesh(backBuffer, options.fill, options.pixel);
}
else if (options.fill == eBuildFilledMesh.None)
{
poly.createMesh(backBuffer, options.stroke);
}
else if (options.separateStrokeMesh)
{
poly.createMesh(backBuffer, options.fill, options.pixel);
poly.createMesh(extraStroke.backBuffer, options.stroke);
}
else
{
poly.createMesh(backBuffer, options.fill, options.pixel, options.stroke);
}
return(true);
}
/// <summary>Build both meshes</summary>
public static void createMesh(this iPolylinePath path, iTriangleMesh result, eBuildFilledMesh filledMesh, float pixel, sStrokeInfo strokeInfo)
{
unsafe
{
sStrokeInfo *si = &strokeInfo;
path.createMesh(result, filledMesh, pixel, ( IntPtr)si);
}
}
/// <summary>Clip the polyline to viewport, using specified clipping rectangle</summary>
public static eClipResult clip(this iPolylinePath source, iPolylinePath dest, Rect clipRect, Matrix3x2 transform, float strokeWidth = 0)
{
unsafe
{
Rect *clip = &clipRect;
source.clip(strokeWidth, ref transform, (IntPtr)clip, dest, out var res);
return(res);
}
}
/// <summary>Tessellate splines and clip the result to viewport, using specified clipping rectangle</summary>
public static eClipResult buildClippedPolylines(this iPathGeometry path, iPolylinePath poly, Rect clipRect, Matrix3x2 transform, float precision, float strokeWidth = 0)
{
unsafe
{
Rect *clip = &clipRect;
path.buildPolylines(precision, strokeWidth, ref transform, (IntPtr)clip, poly, out var res);
return(res);
}
}
public static iPolylinePath getTemp(iVrmacDraw factory)
{
iPolylinePath tmp = tempPolyline;
if (null != tmp)
{
return(tmp);
}
tmp = factory.createPolylinePath();
tempPolyline = tmp;
return(tmp);
}
/// <summary>Access polylines generated by path geometry.</summary>
/// <remarks>Despite the name, this method doesn’t download anything.
/// Instead, it provides a read-only view of the data stored in unmanaged memory, in std::vector<Vector2> C++ containers.</remarks>
public static void downloadPolylines(this iPolylinePath path, PolylineDelegate poly)
{
Span <sPolylineFigure> figures = stackalloc sPolylineFigure[path.info.figuresCount];
path.getFigures(ref figures.GetPinnableReference());
int figureIndex = 0;
foreach (var f in figures)
{
if (f.vertexCount > 0)
{
var verts = Unsafe.readSpan <Vector2>(f.firstVertexPointer, f.vertexCount);
poly(figureIndex, verts, f.isFilled, f.isClosed);
}
figureIndex++;
}
}
void threadMain2()
{
DequedJob job;
iPolylinePath tempPoly = TempPolylines.getTemp(factory);
Rect clipRect;
lock (queues.syncRoot)
{
clipRect = getClippingRect();
job = queues.dequeue();
if (!job)
{
threadFinished();
return;
}
}
bool updated = job.tessellate(ref clipRect, tempPoly);
while (true)
{
lock (queues.syncRoot)
{
if (job.isSameOptions())
{
queues.completed(ref job, updated);
updated = false;
job = queues.dequeue();
if (!job)
{
threadFinished();
return;
}
}
}
bool u = job.tessellate(ref clipRect, tempPoly);
updated = updated || u;
}
}
/// <summary>Build just the filled mesh</summary>
public static void createMesh(this iPolylinePath path, iTriangleMesh result, eBuildFilledMesh filledMesh, float pixel)
{
Debug.Assert(filledMesh != eBuildFilledMesh.None);
path.createMesh(result, filledMesh, pixel, IntPtr.Zero);
}
/// <summary>Clip the polyline to viewport, using default clipping rectangle</summary>
public static eClipResult clip(this iPolylinePath source, iPolylinePath dest, Matrix3x2 transform, float strokeWidth = 0)
{
source.clip(strokeWidth, ref transform, IntPtr.Zero, dest, out var res);
return(res);
}
/// <summary>Tessellate splines and clip the result to viewport, using default clipping rectangle</summary>
public static eClipResult buildClippedPolylines(this iPathGeometry path, iPolylinePath poly, Matrix3x2 transform, float precision, float strokeWidth = 0)
{
path.buildPolylines(precision, strokeWidth, ref transform, IntPtr.Zero, poly, out var res);
return(res);
}
public bool tessellate(ref Rect clip, iPolylinePath poly)
{
return(meshes.tessellate(ref options, ref clip, poly, ref hash));
}