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Merge branch 'master' of github.com:UglyToad/PdfPig

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Eliot Jones 2022-07-02 18:09:22 -04:00
commit 545d1a0793
1 changed files with 105 additions and 0 deletions
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105
src/UglyToad.PdfPig/Writer/PdfPageBuilder.cs
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@ -180,6 +180,111 @@
}
}
/// <summary>
/// Draws a triangle on the current page with the specified points and line width.
/// </summary>
/// <param name="point1">Position of the first corner of the triangle.</param>
/// <param name="point2">Position of the second corner of the triangle.</param>
/// <param name="point3">Position of the third corner of the triangle.</param>
/// <param name="lineWidth">The width of the line border of the triangle.</param>
/// <param name="fill">Whether to fill with the color set by <see cref="SetTextAndFillColor"/>.</param>
public void DrawTriangle(PdfPoint point1, PdfPoint point2, PdfPoint point3, decimal lineWidth = 1, bool fill = false)
{
if (lineWidth != 1)
{
currentStream.Add(new SetLineWidth(lineWidth));
}
currentStream.Add(new BeginNewSubpath((decimal)point1.X, (decimal)point1.Y));
currentStream.Add(new AppendStraightLineSegment((decimal)point2.X, (decimal)point2.Y));
currentStream.Add(new AppendStraightLineSegment((decimal)point3.X, (decimal)point3.Y));
currentStream.Add(new AppendStraightLineSegment((decimal)point1.X, (decimal)point1.Y));
if (fill)
{
currentStream.Add(FillPathEvenOddRuleAndStroke.Value);
}
else
{
currentStream.Add(StrokePath.Value);
}
if (lineWidth != 1)
{
currentStream.Add(new SetLineWidth(lineWidth));
}
}
/// <summary>
/// Draws a circle on the current page centering at the specified point with the given diameter and line width.
/// </summary>
/// <param name="center">The center position of the circle.</param>
/// <param name="diameter">The diameter of the circle.</param>
/// <param name="lineWidth">The width of the line border of the circle.</param>
/// <param name="fill">Whether to fill with the color set by <see cref="SetTextAndFillColor"/>.</param>
public void DrawCircle(PdfPoint center, decimal diameter, decimal lineWidth = 1, bool fill = false)
{
DrawEllipsis(center, diameter, diameter, lineWidth, fill);
}
/// <summary>
/// Draws an ellipsis on the current page centering at the specified point with the given width, height and line width.
/// </summary>
/// <param name="center">The center position of the ellipsis.</param>
/// <param name="width">The width of the ellipsis.</param>
/// <param name="height">The height of the ellipsis.</param>
/// <param name="lineWidth">The width of the line border of the ellipsis.</param>
/// <param name="fill">Whether to fill with the color set by <see cref="SetTextAndFillColor"/>.</param>
public void DrawEllipsis(PdfPoint center, decimal width, decimal height, decimal lineWidth = 1, bool fill = false)
{
width /= 2;
height /= 2;
// See here: https://spencermortensen.com/articles/bezier-circle/
decimal cc = 0.55228474983079m;
if (lineWidth != 1)
{
currentStream.Add(new SetLineWidth(lineWidth));
}
currentStream.Add(new BeginNewSubpath((decimal)center.X - width, (decimal)center.Y));
currentStream.Add(new AppendDualControlPointBezierCurve(
(decimal)center.X - width, (decimal)center.Y + height * cc,
(decimal)center.X - width * cc, (decimal)center.Y + height,
(decimal)center.X, (decimal)center.Y + height
));
currentStream.Add(new AppendDualControlPointBezierCurve(
(decimal)center.X + width * cc, (decimal)center.Y + height,
(decimal)center.X + width, (decimal)center.Y + height * cc,
(decimal)center.X + width, (decimal)center.Y
));
currentStream.Add(new AppendDualControlPointBezierCurve(
(decimal)center.X + width, (decimal)center.Y - height * cc,
(decimal)center.X + width * cc, (decimal)center.Y - height,
(decimal)center.X, (decimal)center.Y - height
));
currentStream.Add(new AppendDualControlPointBezierCurve(
(decimal)center.X - width * cc, (decimal)center.Y - height,
(decimal)center.X - width, (decimal)center.Y - height * cc,
(decimal)center.X - width, (decimal)center.Y
));
if (fill)
{
currentStream.Add(FillPathEvenOddRuleAndStroke.Value);
}
else
{
currentStream.Add(StrokePath.Value);
}
if (lineWidth != 1)
{
currentStream.Add(new SetLineWidth(lineWidth));
}
}
/// <summary>
/// Sets the stroke color for any following operations to the RGB value. Use <see cref="ResetColor"/> to reset.
/// </summary>