public bool ReadRecord(out DrawGeometryCommand record)
{
record = default;
unsafe
{
fixed(byte *pByte = this.buffer)
{
// This pointer points to the current read point in the
// instruction stream.
byte *pCur = pByte;
// This points to the first byte past the end of the
// instruction stream (i.e. when to stop)
byte *pEndOfInstructions = pByte + this.currentReadOffset;
if ((pCur >= pEndOfInstructions)) //reach end
{
return(false);
}
RecordHeader *pCurRecord = (RecordHeader *)pCur;
if (pCurRecord->Type != RecordType.DrawGeometry)
{
return(false);
}
DrawGeometryCommand *data = (DrawGeometryCommand *)(pCur + sizeof(RecordHeader));
record = *data;
this.currentReadOffset += pCurRecord->Size;
return(true);
}
}
}
public override void DrawGeometry(Brush brush, Pen pen, Geometry geometry)
{
if (brush == null && pen == null || geometry == null)
{
return;
}
unsafe
{
EnsureContent();
var record =
new DrawGeometryCommand(
content.AddDependentResource(brush),
content.AddDependentResource(pen),
content.AddDependentResource(geometry)
);
content.WriteRecord(RecordType.DrawGeometry, (byte *)&record, sizeof(DrawGeometryCommand));
}
}
