// FillStyle demonstrates the difference between even odd and non zero winding rule.
func FillStyle(gc draw2d.GraphicContext, x, y, width, height float64) {
sx, sy := width/232, height/220
gc.SetLineWidth(width / 40)
draw2d.Rect(gc, x+sx*0, y+sy*12, x+sx*232, y+sy*70)
wheel1 := new(draw2d.PathStorage)
wheel1.ArcTo(x+sx*52, y+sy*70, sx*40, sy*40, 0, 2*math.Pi)
wheel2 := new(draw2d.PathStorage)
wheel2.ArcTo(x+sx*180, y+sy*70, sx*40, sy*40, 0, -2*math.Pi)
gc.SetFillRule(draw2d.FillRuleEvenOdd)
gc.SetFillColor(color.NRGBA{0, 0xB2, 0, 0xFF})
gc.SetStrokeColor(image.Black)
gc.FillStroke(wheel1, wheel2)
draw2d.Rect(gc, x, y+sy*140, x+sx*232, y+sy*198)
wheel1 = new(draw2d.PathStorage)
wheel1.ArcTo(x+sx*52, y+sy*198, sx*40, sy*40, 0, 2*math.Pi)
wheel2 = new(draw2d.PathStorage)
wheel2.ArcTo(x+sx*180, y+sy*198, sx*40, sy*40, 0, -2*math.Pi)
gc.SetFillRule(draw2d.FillRuleWinding)
gc.SetFillColor(color.NRGBA{0, 0, 0xE5, 0xFF})
gc.FillStroke(wheel1, wheel2)
}
// FillString draws a filled and stroked string.
func FillString(gc draw2d.GraphicContext, x, y, width, height float64) {
sx, sy := width/100, height/100
gc.Save()
gc.SetStrokeColor(image.Black)
gc.SetLineWidth(1)
draw2d.RoundRect(gc, x+sx*5, y+sy*5, x+sx*95, y+sy*95, sx*10, sy*10)
gc.FillStroke()
gc.SetFillColor(image.Black)
gc.SetFontSize(height / 6)
gc.Translate(x+sx*6, y+sy*52)
gc.SetFontData(draw2d.FontData{
Name: "luxi",
Family: draw2d.FontFamilyMono,
Style: draw2d.FontStyleBold | draw2d.FontStyleItalic})
w := gc.FillString("Hug")
gc.Translate(w+sx, 0)
left, top, right, bottom := gc.GetStringBounds("cou")
gc.SetStrokeColor(color.NRGBA{255, 0x33, 0x33, 0x80})
draw2d.Rect(gc, left, top, right, bottom)
gc.SetLineWidth(height / 50)
gc.Stroke()
gc.SetFillColor(color.NRGBA{0x33, 0x33, 0xff, 0xff})
gc.SetStrokeColor(color.NRGBA{0x33, 0x33, 0xff, 0xff})
gc.SetLineWidth(height / 100)
gc.StrokeString("Hug")
gc.Restore()
}
func (h *HilbertImage) drawRectange(gc *draw2d.ImageGraphicContext, px1, py1, px2, py2 float64) {
gc.SetFillColor(h.BackgroundColor)
gc.SetStrokeColor(h.GridColor)
gc.SetLineWidth(1)
draw2d.Rect(gc, px1, py1, px2, py2)
gc.FillStroke()
}
// clearRect draws a white rectangle
func clearRect(gc *GraphicContext, x1, y1, x2, y2 float64) {
// save state
f := gc.Current.FillColor
x, y := gc.pdf.GetXY()
// cover page with white rectangle
gc.SetFillColor(white)
draw2d.Rect(gc, x1, y1, x2, y2)
gc.Fill()
// restore state
gc.SetFillColor(f)
gc.pdf.MoveTo(x, y)
}
// Draw the droid on a certain position.
func Draw(gc draw2d.GraphicContext, x, y float64) {
// set the fill and stroke color of the droid
gc.SetFillColor(color.RGBA{0x44, 0xff, 0x44, 0xff})
gc.SetStrokeColor(color.RGBA{0x44, 0x44, 0x44, 0xff})
// set line properties
gc.SetLineCap(draw2d.RoundCap)
gc.SetLineWidth(5)
// head
gc.MoveTo(x+30, y+70)
gc.ArcTo(x+80, y+70, 50, 50, 180*(math.Pi/180), 180*(math.Pi/180))
gc.Close()
gc.FillStroke()
gc.MoveTo(x+60, y+25)
gc.LineTo(x+50, y+10)
gc.MoveTo(x+100, y+25)
gc.LineTo(x+110, y+10)
gc.Stroke()
// left eye
draw2d.Circle(gc, x+60, y+45, 5)
gc.FillStroke()
// right eye
draw2d.Circle(gc, x+100, y+45, 5)
gc.FillStroke()
// body
draw2d.RoundRect(gc, x+30, y+75, x+30+100, y+75+90, 10, 10)
gc.FillStroke()
draw2d.Rect(gc, x+30, y+75, x+30+100, y+75+80)
gc.FillStroke()
// left arm
draw2d.RoundRect(gc, x+5, y+80, x+5+20, y+80+70, 10, 10)
gc.FillStroke()
// right arm
draw2d.RoundRect(gc, x+135, y+80, x+135+20, y+80+70, 10, 10)
gc.FillStroke()
// left leg
draw2d.RoundRect(gc, x+50, y+150, x+50+20, y+150+50, 10, 10)
gc.FillStroke()
// right leg
draw2d.RoundRect(gc, x+90, y+150, x+90+20, y+150+50, 10, 10)
gc.FillStroke()
}