From 65947eb0478c6de3aed7afe1640d49d6ee7f0cd7 Mon Sep 17 00:00:00 2001
From: Michael Fogleman <fogleman@gmail.com>
Date: Wed, 14 Dec 2016 14:43:30 -0500
Subject: [PATCH] add SetPixel and DrawPoint

---
 context.go | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/context.go b/context.go
index e961953..f6120f2 100644
--- a/context.go
+++ b/context.go
@@ -483,6 +483,22 @@ func (dc *Context) Clear() {
 	draw.Draw(dc.im, dc.im.Bounds(), src, image.ZP, draw.Src)
 }
 
+// SetPixel sets the color of the specified pixel using the current color.
+func (dc *Context) SetPixel(x, y int) {
+	dc.im.Set(x, y, dc.color)
+}
+
+// DrawPoint is like DrawCircle but ensures that a circle of the specified
+// size is drawn regardless of the current transformation matrix. The position
+// is still transformed, but not the shape of the point.
+func (dc *Context) DrawPoint(x, y, r float64) {
+	dc.Push()
+	tx, ty := dc.TransformPoint(x, y)
+	dc.Identity()
+	dc.DrawCircle(tx, ty, r)
+	dc.Pop()
+}
+
 func (dc *Context) DrawLine(x1, y1, x2, y2 float64) {
 	dc.MoveTo(x1, y1)
 	dc.LineTo(x2, y2)