static void RenderLane(IImageProcessingContext context, Rgba32 color, PointF point1, PointF point2, SizeF offsetDir1, SizeF offsetDir2, float offset1, float offset2)
{
context.FillPolygon(
color,
Offset(point1, offsetDir1, offset1),
Offset(point1, offsetDir1, offset2),
Offset(point2, offsetDir2, offset2),
Offset(point2, offsetDir2, offset1)
);
}
public void Render(GraphBuilder context, IImageProcessingContext <Rgba32> renderContext, GraphicsOptions options)
{
// top and right
PointF labelEndpoint;
if (IsVertical)
{
PointF endpoint1 = new PointF(context.GridRegion.Left + context.Origin.X, context.GridRegion.Top + PositiveEndAxisMargin + ArrowLength);
PointF endpoint2 = new PointF(context.GridRegion.Left + context.Origin.X, context.GridRegion.Bottom - NegativeEndAxisMargin - ArrowLength);
labelEndpoint = endpoint1;
renderContext.DrawLines(Brush, LineThickness, new PointF[] { endpoint1, endpoint2 });
if (ArrowWidth > 0 && ArrowLength > 0)
{
if (EnablePositiveEndArrow)
{
// top, add Y
renderContext.FillPolygon(ArrowColor, new PointF[] {
endpoint1 - new PointF(0, ArrowLength),
endpoint1 + new PointF(-ArrowWidth / 2, 0),
endpoint1 + new PointF(ArrowWidth / 2, 0)
}, options);
}
if (EnableNegativeEndArrow)
{
// bottom, subtract Y
renderContext.FillPolygon(ArrowColor, new PointF[] {
endpoint2 + new PointF(0, ArrowLength),
endpoint2 - new PointF(-ArrowWidth / 2, 0),
endpoint2 - new PointF(ArrowWidth / 2, 0)
}, options);
}
}
if (TitleLabel != null)
{
RectangleF textBounds = TextMeasurer.MeasureBounds(TitleLabel.Text, new RendererOptions(TitleLabel.Font));
int higherDimension = (int)Math.Ceiling(Math.Max(textBounds.Width, textBounds.Height));
using (Image <Rgba32> textRenderImage = new Image <Rgba32>(higherDimension, higherDimension))
{
textRenderImage.Mutate(tempContext =>
tempContext
.DrawText(TitleLabel.Text, TitleLabel.Font, TitleLabel.Color, PointF.Empty, options)
.Rotate(-90));
// TODO can I do this in the same IImageProcessingContext or do I have to stop, let it write, then read, then write
textRenderImage.MutateCropToColored();
PointF renderPosition = context.GridRegion.Position() + context.Origin + TitleLabel.Displacement - textRenderImage.Size() + new PointF(0, (textRenderImage.Height / 2) - ((context.Origin.Y + context.GridRegion.Top - endpoint1.Y) / 2));
renderContext.DrawImage(textRenderImage, textRenderImage.Size(), (Point)renderPosition, options);
}
}
}
else
{
PointF endpoint1 = new PointF(context.GridRegion.Left + NegativeEndAxisMargin + ArrowLength, context.GridRegion.Top + context.Origin.Y);
PointF endpoint2 = new PointF(context.GridRegion.Right - PositiveEndAxisMargin - ArrowLength, context.GridRegion.Top + context.Origin.Y);
labelEndpoint = endpoint2;
renderContext.DrawLines(Brush, LineThickness, new PointF[] { endpoint1, endpoint2 });
if (ArrowWidth > 0 && ArrowLength > 0)
{
if (EnableNegativeEndArrow)
{
// left, add X
renderContext.FillPolygon(ArrowColor, new PointF[] {
endpoint1 - new PointF(ArrowLength, 0),
endpoint1 + new PointF(0, -ArrowWidth / 2),
endpoint1 + new PointF(0, ArrowWidth / 2)
}, options);
}
if (EnablePositiveEndArrow)
{
// right, subtract X
renderContext.FillPolygon(ArrowColor, new PointF[] {
endpoint2 + new PointF(ArrowLength, 0),
endpoint2 - new PointF(0, -ArrowWidth / 2),
endpoint2 - new PointF(0, ArrowWidth / 2)
}, options);
}
}
if (TitleLabel != null)
{
//var textBounds = TextMeasurer.Measure(TitleLabel.Text, new RendererOptions(TitleLabel.Font));
// TODO: why does this work without a textBounds displacement for re-origining?
var pos = context.GridRegion.Position() + context.Origin + TitleLabel.Displacement + new PointF(((endpoint2.X - (context.GridRegion.Left + context.Origin.X)) / 2), 0);
renderContext.DrawText(TitleLabel.Text, TitleLabel.Font, TitleLabel.Color, pos, options);
}
}
if (EndpointLabel != null)
{
renderContext.DrawText(EndpointLabel.Text, EndpointLabel.Font, EndpointLabel.Color, labelEndpoint + EndpointLabel.Displacement, options);
}
}