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add SetPixel and DrawPoint

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This commit is contained in:
Michael Fogleman 2016-12-14 14:43:30 -05:00
parent 5917fd97e8
commit 65947eb047
1 changed files with 16 additions and 0 deletions
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16
context.go
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@ -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)