Merge pull request #63 from stanim/samples

Add extra samples, fix arc angle and implement SetLineDash for pdf

AUTHORS

@@ -1 +1,2 @@
-Laurent Le Goff 
+Laurent Le Goff
+Stani Michiels, gmail:stani.be

README.md

@@ -5,6 +5,9 @@ Package draw2d is a pure [go](http://golang.org) 2D vector graphics library with
 
 See the [documentation](http://godoc.org/github.com/llgcode/draw2d) for more details.
 
+![demonstration of the image backend](https://raw.githubusercontent.com/llgcode/draw2d/master/output/samples/geometry.png)
+The image above is generated with the image backend. The pdf which is generated with exactly the same code is [here](https://raw.githubusercontent.com/llgcode/draw2d/master/output/samples/geometry.pdf).
+
 Features
 --------
 

draw2dpdf/gc.go

@@ -261,6 +261,12 @@ func (gc *GraphicContext) SetFontSize(fontSize float64) {
 	gc.pdf.SetFontSize(fontSize * gc.Current.Scale)
 }
 
+// SetLineDash sets the line dash pattern
+func (gc *GraphicContext) SetLineDash(Dash []float64, DashOffset float64) {
+	gc.StackGraphicContext.SetLineDash(Dash, DashOffset)
+	gc.pdf.SetDashPattern(Dash, DashOffset)
+}
+
 // SetLineWidth sets the line width
 func (gc *GraphicContext) SetLineWidth(LineWidth float64) {
 	gc.StackGraphicContext.SetLineWidth(LineWidth)

draw2dpdf/path_converter.go

@@ -47,10 +47,11 @@ func (c *PathConverter) ConvertCommand(cmd draw2d.PathCmd, vertices ...float64)
 		c.pdf.CurveBezierCubicTo(vertices[0], vertices[1], vertices[2], vertices[3], vertices[4], vertices[5])
 		return 6
 	case draw2d.ArcTo:
+		// draw2d: angles clockwise, fpdf angles counter clockwise
 		c.pdf.ArcTo(vertices[0], vertices[1], vertices[2], vertices[3],
-			0,                             // degRotate
+			0,                              // degRotate
-			vertices[4]*deg,               // degStart = startAngle
+			-vertices[4]*deg,               // degStart = -startAngle
-			(vertices[4]-vertices[5])*deg) // degEnd = startAngle-angle
+			(-vertices[4]-vertices[5])*deg) // degEnd = -startAngle-angle
 		return 6
 	default: // case draw2d.Close:
 		c.pdf.ClosePath()

draw2dpdf/samples_test.go

@@ -10,7 +10,9 @@ import (
 	"github.com/llgcode/draw2d"
 	"github.com/llgcode/draw2d/samples/android"
 	"github.com/llgcode/draw2d/samples/frameimage"
+	"github.com/llgcode/draw2d/samples/geometry"
 	"github.com/llgcode/draw2d/samples/gopher"
+	"github.com/llgcode/draw2d/samples/gopher2"
 	"github.com/llgcode/draw2d/samples/helloworld"
 	"github.com/llgcode/draw2d/samples/line"
 	"github.com/llgcode/draw2d/samples/linecapjoin"
@@ -21,10 +23,23 @@ func TestSampleAndroid(t *testing.T) {
 	test(t, android.Main)
 }
 
+// TODO: FillString: w (width) is incorrect
+func TestSampleGeometry(t *testing.T) {
+	// Set the global folder for searching fonts
+	// The pdf backend needs for every ttf file its corresponding
+	// json/.z file which is generated by gofpdf/makefont.
+	draw2d.SetFontFolder("../resource/font")
+	test(t, geometry.Main)
+}
+
 func TestSampleGopher(t *testing.T) {
 	test(t, gopher.Main)
 }
 
+func TestSampleGopher2(t *testing.T) {
+	test(t, gopher2.Main)
+}
+
 func TestSampleHelloWorld(t *testing.T) {
 	// Set the global folder for searching fonts
 	// The pdf backend needs for every ttf file its corresponding

draw2dpdf/test_test.go

@@ -7,6 +7,7 @@
 package draw2dpdf_test
 
 import (
+	"os"
 	"testing"
 
 	"github.com/llgcode/draw2d"
@@ -25,13 +26,13 @@ func test(t *testing.T, draw sample) {
 		t.Errorf("Drawing %q failed: %v", output, err)
 		return
 	}
-	/*
+
-		// Save to pdf only if it doesn't exist because of git
+	// Save to pdf only if it doesn't exist because of git
-		if _, err = os.Stat(output); err == nil {
+	if _, err = os.Stat(output); err == nil {
-			t.Skipf("Saving %q skipped, as it exists already. (Git would consider it modified.)", output)
+		t.Skipf("Saving %q skipped, as it exists already. (Git would consider it modified.)", output)
-			return
+		return
-		}
+	}
-	*/
+
 	err = draw2dpdf.SaveToPdfFile(output, dest)
 	if err != nil {
 		t.Errorf("Saving %q failed: %v", output, err)

output/README.md

@@ -0,0 +1,11 @@
+Demo output
+===========
+
+These folders are empty when you check out the git repository. The output is generated by the tests:
+```
+go test ./...
+```
+or with coverage:
+```
+go test -cover ./... | grep -v "no test"
+```

output/samples/.gitignore

@@ -1,4 +1,5 @@
 # Ignore everything in this directory
 *
 # Except this file
-!.gitignore
+!.gitignore
+!geometry.*

samples/geometry/geometry.go

@@ -0,0 +1,331 @@
+// Copyright 2010 The draw2d Authors. All rights reserved.
+// created: 21/11/2010 by Laurent Le Goff
+
+// Package geometry draws some geometric tests.
+package geometry
+
+import (
+	"image"
+	"image/color"
+	"math"
+
+	"github.com/llgcode/draw2d"
+	"github.com/llgcode/draw2d/samples"
+	"github.com/llgcode/draw2d/samples/gopher2"
+)
+
+// Main draws geometry and returns the filename. This should only be
+// used during testing.
+func Main(gc draw2d.GraphicContext, ext string) (string, error) {
+	// Draw the droid
+	Draw(gc, 297, 210)
+
+	// Return the output filename
+	return samples.Output("geometry", ext), nil
+}
+
+// Bubble draws a text balloon.
+func Bubble(gc draw2d.GraphicContext, x, y, width, height float64) {
+	sx, sy := width/100, height/100
+	gc.MoveTo(x+sx*50, y)
+	gc.QuadCurveTo(x, y, x, y+sy*37.5)
+	gc.QuadCurveTo(x, y+sy*75, x+sx*25, y+sy*75)
+	gc.QuadCurveTo(x+sx*25, y+sy*95, x+sx*5, y+sy*100)
+	gc.QuadCurveTo(x+sx*35, y+sy*95, x+sx*40, y+sy*75)
+	gc.QuadCurveTo(x+sx*100, y+sy*75, x+sx*100, y+sy*37.5)
+	gc.QuadCurveTo(x+sx*100, y, x+sx*50, y)
+	gc.Stroke()
+}
+
+// CurveRectangle draws a rectangle with bezier curves (not rounded rectangle).
+func CurveRectangle(gc draw2d.GraphicContext, x0, y0,
+	rectWidth, rectHeight float64, stroke, fill color.Color) {
+	radius := (rectWidth + rectHeight) / 4
+
+	x1 := x0 + rectWidth
+	y1 := y0 + rectHeight
+	if rectWidth/2 < radius {
+		if rectHeight/2 < radius {
+			gc.MoveTo(x0, (y0+y1)/2)
+			gc.CubicCurveTo(x0, y0, x0, y0, (x0+x1)/2, y0)
+			gc.CubicCurveTo(x1, y0, x1, y0, x1, (y0+y1)/2)
+			gc.CubicCurveTo(x1, y1, x1, y1, (x1+x0)/2, y1)
+			gc.CubicCurveTo(x0, y1, x0, y1, x0, (y0+y1)/2)
+		} else {
+			gc.MoveTo(x0, y0+radius)
+			gc.CubicCurveTo(x0, y0, x0, y0, (x0+x1)/2, y0)
+			gc.CubicCurveTo(x1, y0, x1, y0, x1, y0+radius)
+			gc.LineTo(x1, y1-radius)
+			gc.CubicCurveTo(x1, y1, x1, y1, (x1+x0)/2, y1)
+			gc.CubicCurveTo(x0, y1, x0, y1, x0, y1-radius)
+		}
+	} else {
+		if rectHeight/2 < radius {
+			gc.MoveTo(x0, (y0+y1)/2)
+			gc.CubicCurveTo(x0, y0, x0, y0, x0+radius, y0)
+			gc.LineTo(x1-radius, y0)
+			gc.CubicCurveTo(x1, y0, x1, y0, x1, (y0+y1)/2)
+			gc.CubicCurveTo(x1, y1, x1, y1, x1-radius, y1)
+			gc.LineTo(x0+radius, y1)
+			gc.CubicCurveTo(x0, y1, x0, y1, x0, (y0+y1)/2)
+		} else {
+			gc.MoveTo(x0, y0+radius)
+			gc.CubicCurveTo(x0, y0, x0, y0, x0+radius, y0)
+			gc.LineTo(x1-radius, y0)
+			gc.CubicCurveTo(x1, y0, x1, y0, x1, y0+radius)
+			gc.LineTo(x1, y1-radius)
+			gc.CubicCurveTo(x1, y1, x1, y1, x1-radius, y1)
+			gc.LineTo(x0+radius, y1)
+			gc.CubicCurveTo(x0, y1, x0, y1, x0, y1-radius)
+		}
+	}
+	gc.Close()
+
+	gc.SetStrokeColor(stroke)
+	gc.SetFillColor(fill)
+	gc.SetLineWidth(10.0)
+	gc.FillStroke()
+}
+
+// Dash draws a line with a dash pattern
+func Dash(gc draw2d.GraphicContext, x, y, width, height float64) {
+	sx, sy := width/162, height/205
+	gc.SetStrokeColor(image.Black)
+	gc.SetLineDash([]float64{height / 10, height / 50, height / 50, height / 50}, -50.0)
+	gc.SetLineCap(draw2d.ButtCap)
+	gc.SetLineJoin(draw2d.RoundJoin)
+	gc.SetLineWidth(height / 50)
+
+	gc.MoveTo(x+sx*60.0, y)
+	gc.LineTo(x+sx*60.0, y)
+	gc.LineTo(x+sx*162, y+sy*205)
+	gc.RLineTo(sx*-102.4, 0.0)
+	gc.CubicCurveTo(x+sx*-17, y+sy*205, x+sx*-17, y+sy*103, x+sx*60.0, y+sy*103.0)
+	gc.Stroke()
+	gc.SetLineDash(nil, 0.0)
+}
+
+// Arc draws an arc with a positive angle (clockwise)
+func Arc(gc draw2d.GraphicContext, xc, yc, width, height float64) {
+	// draw an arc
+	xc += width / 2
+	yc += height / 2
+	radiusX, radiusY := width/2, height/2
+	startAngle := 45 * (math.Pi / 180.0) /* angles are specified */
+	angle := 135 * (math.Pi / 180.0)     /* clockwise in radians           */
+	gc.SetLineWidth(width / 10)
+	gc.SetLineCap(draw2d.ButtCap)
+	gc.SetStrokeColor(image.Black)
+	gc.MoveTo(xc+math.Cos(startAngle)*radiusX, yc+math.Sin(startAngle)*radiusY)
+	gc.ArcTo(xc, yc, radiusX, radiusY, startAngle, angle)
+	gc.Stroke()
+
+	// fill a circle
+	gc.SetStrokeColor(color.NRGBA{255, 0x33, 0x33, 0x80})
+	gc.SetFillColor(color.NRGBA{255, 0x33, 0x33, 0x80})
+	gc.SetLineWidth(width / 20)
+
+	gc.MoveTo(xc, yc)
+	gc.LineTo(xc+math.Cos(startAngle)*radiusX, yc+math.Sin(startAngle)*radiusY)
+	gc.MoveTo(xc, yc)
+	gc.LineTo(xc-radiusX, yc)
+	gc.Stroke()
+
+	gc.MoveTo(xc, yc)
+	gc.ArcTo(xc, yc, width/10.0, height/10.0, 0, 2*math.Pi)
+	gc.Fill()
+}
+
+// ArcNegative draws an arc with a negative angle (anti clockwise).
+func ArcNegative(gc draw2d.GraphicContext, xc, yc, width, height float64) {
+	xc += width / 2
+	yc += height / 2
+	radiusX, radiusY := width/2, height/2
+	startAngle := 45.0 * (math.Pi / 180.0) /* angles are specified */
+	angle := -225 * (math.Pi / 180.0)      /* clockwise in radians */
+	gc.SetLineWidth(width / 10)
+	gc.SetLineCap(draw2d.ButtCap)
+	gc.SetStrokeColor(image.Black)
+
+	gc.ArcTo(xc, yc, radiusX, radiusY, startAngle, angle)
+	gc.Stroke()
+	// fill a circle
+	gc.SetStrokeColor(color.NRGBA{255, 0x33, 0x33, 0x80})
+	gc.SetFillColor(color.NRGBA{255, 0x33, 0x33, 0x80})
+	gc.SetLineWidth(width / 20)
+
+	gc.MoveTo(xc, yc)
+	gc.LineTo(xc+math.Cos(startAngle)*radiusX, yc+math.Sin(startAngle)*radiusY)
+	gc.MoveTo(xc, yc)
+	gc.LineTo(xc-radiusX, yc)
+	gc.Stroke()
+
+	gc.ArcTo(xc, yc, width/10.0, height/10.0, 0, 2*math.Pi)
+	gc.Fill()
+}
+
+// CubicCurve draws a cubic curve with its control points.
+func CubicCurve(gc draw2d.GraphicContext, x, y, width, height float64) {
+	sx, sy := width/162, height/205
+	x0, y0 := x, y+sy*100.0
+	x1, y1 := x+sx*75, y+sy*205
+	x2, y2 := x+sx*125, y
+	x3, y3 := x+sx*205, y+sy*100
+
+	gc.SetStrokeColor(image.Black)
+	gc.SetFillColor(color.NRGBA{0xAA, 0xAA, 0xAA, 0xFF})
+	gc.SetLineWidth(width / 10)
+	gc.MoveTo(x0, y0)
+	gc.CubicCurveTo(x1, y1, x2, y2, x3, y3)
+	gc.Stroke()
+
+	gc.SetStrokeColor(color.NRGBA{0xFF, 0x33, 0x33, 0x88})
+
+	gc.SetLineWidth(width / 20)
+	// draw segment of curve
+	gc.MoveTo(x0, y0)
+	gc.LineTo(x1, y1)
+	gc.LineTo(x2, y2)
+	gc.LineTo(x3, y3)
+	gc.Stroke()
+}
+
+// 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("cou")
+	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 / 20)
+	gc.Stroke()
+	gc.SetStrokeColor(color.NRGBA{0x33, 0x33, 0xff, 0xff})
+	gc.SetLineWidth(height / 100)
+	gc.StrokeString("cou")
+	gc.Restore()
+}
+
+// FillStroke first fills and afterwards strokes a path.
+func FillStroke(gc draw2d.GraphicContext, x, y, width, height float64) {
+	sx, sy := width/210, height/215
+	gc.MoveTo(x+sx*113.0, y)
+	gc.LineTo(x+sx*215.0, y+sy*215)
+	gc.RLineTo(sx*-100, 0)
+	gc.CubicCurveTo(x+sx*35, y+sy*215, x+sx*35, y+sy*113, x+sx*113.0, y+sy*113)
+	gc.Close()
+
+	gc.MoveTo(x+sx*50.0, y)
+	gc.RLineTo(sx*51.2, sy*51.2)
+	gc.RLineTo(sx*-51.2, sy*51.2)
+	gc.RLineTo(sx*-51.2, sy*-51.2)
+	gc.Close()
+
+	gc.SetLineWidth(width / 20.0)
+	gc.SetFillColor(color.NRGBA{0, 0, 0xFF, 0xFF})
+	gc.SetStrokeColor(image.Black)
+	gc.FillStroke()
+}
+
+// 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)
+}
+
+// PathTransform scales a path differently in horizontal and vertical direction.
+func PathTransform(gc draw2d.GraphicContext, x, y, width, height float64) {
+	gc.Save()
+	gc.SetLineWidth(width / 10)
+	gc.Translate(x+width/2, y+height/2)
+	gc.Scale(1, 4)
+	gc.ArcTo(0, 0, width/8, height/8, 0, math.Pi*2)
+	gc.Close()
+	gc.Stroke()
+	gc.Restore()
+}
+
+// Star draws many lines from a center.
+func Star(gc draw2d.GraphicContext, x, y, width, height float64) {
+	gc.Save()
+	gc.Translate(x+width/2, y+height/2)
+	gc.SetLineWidth(width / 40)
+	for i := 0.0; i < 360; i = i + 10 { // Go from 0 to 360 degrees in 10 degree steps
+		gc.Save()                        // Keep rotations temporary
+		gc.Rotate(i * (math.Pi / 180.0)) // Rotate by degrees on stack from 'for'
+		gc.MoveTo(0, 0)
+		gc.LineTo(width/2, 0)
+		gc.Stroke()
+		gc.Restore()
+	}
+	gc.Restore()
+}
+
+// Draw all figures in a nice 4x3 grid.
+func Draw(gc draw2d.GraphicContext, width, height float64) {
+	mx, my := width*0.025, height*0.025 // margin
+	dx, dy := (width-2*mx)/4, (height-2*my)/3
+	w, h := dx-2*mx, dy-2*my
+	x0, y := 2*mx, 2*my
+	x := x0
+	Bubble(gc, x, y, w, h)
+	x += dx
+	CurveRectangle(gc, x, y, w, h, color.NRGBA{0x80, 0, 0, 0x80}, color.NRGBA{0x80, 0x80, 0xFF, 0xFF})
+	x += dx
+	Dash(gc, x, y, w, h)
+	x += dx
+	Arc(gc, x, y, w, h)
+	x = x0
+	y += dy
+	ArcNegative(gc, x, y, w, h)
+	x += dx
+	CubicCurve(gc, x, y, w, h)
+	x += dx
+	FillString(gc, x, y, w, h)
+	x += dx
+	FillStroke(gc, x, y, w, h)
+	x = x0
+	y += dy
+	FillStyle(gc, x, y, w, h)
+	x += dx
+	PathTransform(gc, x, y, w, h)
+	x += dx
+	Star(gc, x, y, w, h)
+	x += dx
+	gopher2.Draw(gc, x, y, w, h/2)
+}

samples/gopher/gopher.go

@@ -13,7 +13,7 @@ import (
 )
 
 // Main draws a left hand and ear of a gopher. Afterwards it returns
-// the filename. This should only be during testing.
+// the filename. This should only be used during testing.
 func Main(gc draw2d.GraphicContext, ext string) (string, error) {
 	gc.Save()
 	gc.Scale(0.5, 0.5)

samples/gopher2/gopher2.go

@@ -0,0 +1,106 @@
+// Copyright 2010 The draw2d Authors. All rights reserved.
+// created: 21/11/2010 by Laurent Le Goff
+
+// Package gopher2 draws a gopher avatar based on a svg of:
+// https://github.com/golang-samples/gopher-vector/
+package gopher2
+
+import (
+	"image"
+	"image/color"
+	"math"
+
+	"github.com/llgcode/draw2d"
+	"github.com/llgcode/draw2d/samples"
+)
+
+// Main draws a rotated face of the gopher. Afterwards it returns
+// the filename. This should only be used during testing.
+func Main(gc draw2d.GraphicContext, ext string) (string, error) {
+	gc.SetStrokeColor(image.Black)
+	gc.SetFillColor(image.White)
+	gc.Save()
+	// Draw a (partial) gopher
+	gc.Translate(-65, 65)
+	gc.Rotate(-30 * (math.Pi / 180.0))
+	Draw(gc, 48, 48, 240, 72)
+	gc.Restore()
+
+	// Return the output filename
+	return samples.Output("gopher2", ext), nil
+}
+
+// Draw a gopher head (not rotated)
+func Draw(gc draw2d.GraphicContext, x, y, w, h float64) {
+	h23 := (h * 2) / 3
+
+	blf := color.RGBA{0, 0, 0, 0xff}          // black
+	wf := color.RGBA{0xff, 0xff, 0xff, 0xff}  // white
+	nf := color.RGBA{0x8B, 0x45, 0x13, 0xff}  // brown opaque
+	brf := color.RGBA{0x8B, 0x45, 0x13, 0x99} // brown transparant
+	brb := color.RGBA{0x8B, 0x45, 0x13, 0xBB} // brown transparant
+
+	// round head top
+	gc.MoveTo(x, y+h)
+	gc.CubicCurveTo(x, y+h*1.05, x+w/2, y-h, x+w, y+h*1.05)
+	gc.Close()
+	gc.SetFillColor(brb)
+	gc.Fill()
+	// rectangle head bottom
+	draw2d.RoundRect(gc, x, y+h, x+w, y+h+h, w/5, h/5)
+	gc.Fill()
+	// left ear outside
+	draw2d.Circle(gc, x, y+h, w/12)
+	gc.SetFillColor(brf)
+	gc.Fill()
+	// left ear inside
+	draw2d.Circle(gc, x, y+h, 0.5*w/12)
+	gc.SetFillColor(nf)
+	gc.Fill()
+	// right ear outside
+	draw2d.Circle(gc, x+w, y+h, w/12)
+	gc.SetFillColor(brf)
+	gc.Fill()
+	// right ear inside
+	draw2d.Circle(gc, x+w, y+h, 0.5*w/12)
+	gc.SetFillColor(nf)
+	gc.Fill()
+	// left eye outside white
+	draw2d.Circle(gc, x+w/3, y+h23, w/9)
+	gc.SetFillColor(wf)
+	gc.Fill()
+	// left eye black
+	draw2d.Circle(gc, x+w/3+w/24, y+h23, 0.5*w/9)
+	gc.SetFillColor(blf)
+	gc.Fill()
+	// left eye inside white
+	draw2d.Circle(gc, x+w/3+w/24+w/48, y+h23, 0.2*w/9)
+	gc.SetFillColor(wf)
+	gc.Fill()
+	// right eye outside white
+	draw2d.Circle(gc, x+w-w/3, y+h23, w/9)
+	gc.Fill()
+	// right eye black
+	draw2d.Circle(gc, x+w-w/3+w/24, y+h23, 0.5*w/9)
+	gc.SetFillColor(blf)
+	gc.Fill()
+	// right eye inside white
+	draw2d.Circle(gc, x+w-(w/3)+w/24+w/48, y+h23, 0.2*w/9)
+	gc.SetFillColor(wf)
+	gc.Fill()
+	// left tooth
+	gc.SetFillColor(wf)
+	draw2d.RoundRect(gc, x+w/2-w/8, y+h+h/2.5, x+w/2-w/8+w/8, y+h+h/2.5+w/6, w/10, w/10)
+	gc.Fill()
+	// right tooth
+	draw2d.RoundRect(gc, x+w/2, y+h+h/2.5, x+w/2+w/8, y+h+h/2.5+w/6, w/10, w/10)
+	gc.Fill()
+	// snout
+	draw2d.Ellipse(gc, x+(w/2), y+h+h/2.5, w/6, w/12)
+	gc.SetFillColor(nf)
+	gc.Fill()
+	// nose
+	draw2d.Ellipse(gc, x+(w/2), y+h+h/7, w/10, w/12)
+	gc.SetFillColor(blf)
+	gc.Fill()
+}

samples_test.go

@@ -8,7 +8,9 @@ import (
 	"github.com/llgcode/draw2d"
 	"github.com/llgcode/draw2d/samples/android"
 	"github.com/llgcode/draw2d/samples/frameimage"
+	"github.com/llgcode/draw2d/samples/geometry"
 	"github.com/llgcode/draw2d/samples/gopher"
+	"github.com/llgcode/draw2d/samples/gopher2"
 	"github.com/llgcode/draw2d/samples/helloworld"
 	"github.com/llgcode/draw2d/samples/line"
 	"github.com/llgcode/draw2d/samples/linecapjoin"
@@ -19,10 +21,22 @@ func TestSampleAndroid(t *testing.T) {
 	test(t, android.Main)
 }
 
+func TestSampleGeometry(t *testing.T) {
+	// Set the global folder for searching fonts
+	// The pdf backend needs for every ttf file its corresponding
+	// json/.z file which is generated by gofpdf/makefont.
+	draw2d.SetFontFolder("resource/font")
+	test(t, geometry.Main)
+}
+
 func TestSampleGopher(t *testing.T) {
 	test(t, gopher.Main)
 }
 
+func TestSampleGopher2(t *testing.T) {
+	test(t, gopher2.Main)
+}
+
 func TestSampleHelloWorld(t *testing.T) {
 	// Set the global folder for searching fonts
 	draw2d.SetFontFolder("resource/font")