add samples go to samples
Laurent Le Goff
parent
1155ad514b
commit
6820bbac91
1 changed files with 537 additions and 0 deletions
537
samples/samples.go
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537
samples/samples.go
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// Copyright 2010 The draw2d Authors. All rights reserved.
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// created: 21/11/2010 by Laurent Le Goff
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// +build ignore
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package main
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import (
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"bufio"
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"fmt"
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"image"
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"image/color"
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"image/png"
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"log"
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"math"
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"os"
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"github.com/llgcode/draw2d"
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)
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const (
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w, h = 512, 512
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)
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var (
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lastTime int64
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)
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func initGc(w, h int) (image.Image, draw2d.GraphicContext) {
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i := image.NewRGBA(image.Rect(0, 0, w, h))
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gc := draw2d.NewGraphicContext(i)
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gc.SetStrokeColor(image.Black)
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gc.SetFillColor(image.White)
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// fill the background
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//gc.Clear()
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return i, gc
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}
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func saveToPngFile(TestName string, m image.Image) {
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filePath := TestName + ".png"
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f, err := os.Create(filePath)
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if err != nil {
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log.Println(err)
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os.Exit(1)
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}
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defer f.Close()
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b := bufio.NewWriter(f)
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err = png.Encode(b, m)
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if err != nil {
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log.Println(err)
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os.Exit(1)
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}
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err = b.Flush()
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if err != nil {
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log.Println(err)
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os.Exit(1)
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}
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fmt.Printf("Wrote %s OK.\n", filePath)
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}
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/*
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<img src="../test_results/TestRectangle.png"/>
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*/
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func TestRectangle() {
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i, gc := initGc(w, h)
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gc.Translate(10, 10)
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gc.MoveTo(0.0, 0.0)
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gc.LineTo(100.0, 00.0)
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gc.LineTo(100.0, 100.0)
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gc.LineTo(0.0, 100.0)
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gc.LineTo(0.0, 0.0)
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gc.FillStroke()
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saveToPngFile("TestRectangle", i)
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}
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/*
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<img src="../test_results/TestDrawArc.png"/>
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*/
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func TestDrawArc() {
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i, gc := initGc(w, h)
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// draw an arc
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xc, yc := 128.0, 128.0
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radiusX, radiusY := 100.0, 100.0
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startAngle := 45.0 * (math.Pi / 180.0) /* angles are specified */
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angle := 135 * (math.Pi / 180.0) /* in radians */
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gc.SetLineWidth(10)
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gc.SetLineCap(draw2d.ButtCap)
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gc.SetStrokeColor(image.Black)
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gc.ArcTo(xc, yc, radiusX, radiusY, startAngle, angle)
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gc.Stroke()
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// fill a circle
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gc.SetStrokeColor(color.NRGBA{255, 0x33, 0x33, 0x80})
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gc.SetFillColor(color.NRGBA{255, 0x33, 0x33, 0x80})
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gc.SetLineWidth(6)
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gc.MoveTo(xc, yc)
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gc.LineTo(xc+math.Cos(startAngle)*radiusX, yc+math.Sin(startAngle)*radiusY)
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gc.MoveTo(xc, yc)
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gc.LineTo(xc-radiusX, yc)
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gc.Stroke()
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gc.ArcTo(xc, yc, 10.0, 10.0, 0, 2*math.Pi)
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gc.Fill()
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saveToPngFile("TestDrawArc", i)
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}
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/*
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<img src="../test_results/TestDrawArc.png"/>
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*/
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func TestDrawArcNegative() {
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i, gc := initGc(w, h)
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// draw an arc
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xc, yc := 128.0, 128.0
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radiusX, radiusY := 100.0, 100.0
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startAngle := 45.0 * (math.Pi / 180.0) /* angles are specified */
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angle := -225 * (math.Pi / 180.0) /* in radians */
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gc.SetLineWidth(10)
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gc.SetLineCap(draw2d.ButtCap)
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gc.SetStrokeColor(image.Black)
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gc.ArcTo(xc, yc, radiusX, radiusY, startAngle, angle)
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gc.Stroke()
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// fill a circle
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gc.SetStrokeColor(color.NRGBA{255, 0x33, 0x33, 0x80})
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gc.SetFillColor(color.NRGBA{255, 0x33, 0x33, 0x80})
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gc.SetLineWidth(6)
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gc.MoveTo(xc, yc)
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gc.LineTo(xc+math.Cos(startAngle)*radiusX, yc+math.Sin(startAngle)*radiusY)
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gc.MoveTo(xc, yc)
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gc.LineTo(xc-radiusX, yc)
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gc.Stroke()
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gc.ArcTo(xc, yc, 10.0, 10.0, 0, 2*math.Pi)
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gc.Fill()
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saveToPngFile("TestDrawArcNegative", i)
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}
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func TestCurveRectangle() {
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i, gc := initGc(w, h)
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/* a custom shape that could be wrapped in a function */
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x0, y0 := 25.6, 25.6 /* parameters like cairo_rectangle */
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rect_width, rect_height := 204.8, 204.8
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radius := 102.4 /* and an approximate curvature radius */
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x1 := x0 + rect_width
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y1 := y0 + rect_height
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if rect_width/2 < radius {
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if rect_height/2 < radius {
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gc.MoveTo(x0, (y0+y1)/2)
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gc.CubicCurveTo(x0, y0, x0, y0, (x0+x1)/2, y0)
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gc.CubicCurveTo(x1, y0, x1, y0, x1, (y0+y1)/2)
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gc.CubicCurveTo(x1, y1, x1, y1, (x1+x0)/2, y1)
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gc.CubicCurveTo(x0, y1, x0, y1, x0, (y0+y1)/2)
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} else {
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gc.MoveTo(x0, y0+radius)
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gc.CubicCurveTo(x0, y0, x0, y0, (x0+x1)/2, y0)
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gc.CubicCurveTo(x1, y0, x1, y0, x1, y0+radius)
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gc.LineTo(x1, y1-radius)
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gc.CubicCurveTo(x1, y1, x1, y1, (x1+x0)/2, y1)
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gc.CubicCurveTo(x0, y1, x0, y1, x0, y1-radius)
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}
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} else {
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if rect_height/2 < radius {
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gc.MoveTo(x0, (y0+y1)/2)
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gc.CubicCurveTo(x0, y0, x0, y0, x0+radius, y0)
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gc.LineTo(x1-radius, y0)
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gc.CubicCurveTo(x1, y0, x1, y0, x1, (y0+y1)/2)
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gc.CubicCurveTo(x1, y1, x1, y1, x1-radius, y1)
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gc.LineTo(x0+radius, y1)
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gc.CubicCurveTo(x0, y1, x0, y1, x0, (y0+y1)/2)
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} else {
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gc.MoveTo(x0, y0+radius)
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gc.CubicCurveTo(x0, y0, x0, y0, x0+radius, y0)
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gc.LineTo(x1-radius, y0)
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gc.CubicCurveTo(x1, y0, x1, y0, x1, y0+radius)
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gc.LineTo(x1, y1-radius)
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gc.CubicCurveTo(x1, y1, x1, y1, x1-radius, y1)
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gc.LineTo(x0+radius, y1)
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gc.CubicCurveTo(x0, y1, x0, y1, x0, y1-radius)
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}
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}
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gc.Close()
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gc.SetFillColor(color.NRGBA{0x80, 0x80, 0xFF, 0xFF})
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gc.SetStrokeColor(color.NRGBA{0x80, 0, 0, 0x80})
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gc.SetLineWidth(10.0)
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gc.FillStroke()
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saveToPngFile("TestCurveRectangle", i)
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}
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/*
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<img src="../test_results/TestDrawCubicCurve.png"/>
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*/
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func TestDrawCubicCurve() {
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i, gc := initGc(w, h)
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// draw a cubic curve
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x, y := 25.6, 128.0
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x1, y1 := 102.4, 230.4
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x2, y2 := 153.6, 25.6
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x3, y3 := 230.4, 128.0
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gc.SetFillColor(color.NRGBA{0xAA, 0xAA, 0xAA, 0xFF})
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gc.SetLineWidth(10)
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gc.MoveTo(x, y)
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gc.CubicCurveTo(x1, y1, x2, y2, x3, y3)
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gc.Stroke()
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gc.SetStrokeColor(color.NRGBA{0xFF, 0x33, 0x33, 0x88})
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gc.SetLineWidth(6)
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// draw segment of curve
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gc.MoveTo(x, y)
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gc.LineTo(x1, y1)
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gc.LineTo(x2, y2)
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gc.LineTo(x3, y3)
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gc.Stroke()
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saveToPngFile("TestDrawCubicCurve", i)
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}
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/*
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<img src="../test_results/TestDash.png"/>
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*/
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func TestDash() {
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i, gc := initGc(w, h)
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gc.SetLineDash([]float64{50, 10, 10, 10}, -50.0)
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gc.SetLineCap(draw2d.ButtCap)
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gc.SetLineJoin(draw2d.BevelJoin)
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gc.SetLineWidth(10)
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gc.MoveTo(128.0, 25.6)
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gc.LineTo(128.0, 25.6)
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gc.LineTo(230.4, 230.4)
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gc.RLineTo(-102.4, 0.0)
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gc.CubicCurveTo(51.2, 230.4, 51.2, 128.0, 128.0, 128.0)
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gc.Stroke()
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gc.SetLineDash(nil, 0.0)
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saveToPngFile("TestDash", i)
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}
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/*
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<img src="../test_results/TestFillStroke.png"/>
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*/
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func TestFillStroke() {
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i, gc := initGc(w, h)
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gc.MoveTo(128.0, 25.6)
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gc.LineTo(230.4, 230.4)
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gc.RLineTo(-102.4, 0.0)
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gc.CubicCurveTo(51.2, 230.4, 51.2, 128.0, 128.0, 128.0)
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gc.Close()
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gc.MoveTo(64.0, 25.6)
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gc.RLineTo(51.2, 51.2)
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gc.RLineTo(-51.2, 51.2)
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gc.RLineTo(-51.2, -51.2)
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gc.Close()
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gc.SetLineWidth(10.0)
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gc.SetFillColor(color.NRGBA{0, 0, 0xFF, 0xFF})
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gc.SetStrokeColor(image.Black)
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gc.FillStroke()
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saveToPngFile("TestFillStroke", i)
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}
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/*
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<img src="../test_results/TestFillStyle.png"/>
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*/
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func TestFillStyle() {
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i, gc := initGc(w, h)
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gc.SetLineWidth(6)
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draw2d.Rect(gc, 12, 12, 244, 70)
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wheel1 := new(draw2d.PathStorage)
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wheel1.ArcTo(64, 64, 40, 40, 0, 2*math.Pi)
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wheel2 := new(draw2d.PathStorage)
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wheel2.ArcTo(192, 64, 40, 40, 0, 2*math.Pi)
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gc.SetFillRule(draw2d.FillRuleEvenOdd)
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gc.SetFillColor(color.NRGBA{0, 0xB2, 0, 0xFF})
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gc.SetStrokeColor(image.Black)
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gc.FillStroke(wheel1, wheel2)
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draw2d.Rect(gc, 12, 140, 244, 198)
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wheel1 = new(draw2d.PathStorage)
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wheel1.ArcTo(64, 192, 40, 40, 0, 2*math.Pi)
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wheel2 = new(draw2d.PathStorage)
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wheel2.ArcTo(192, 192, 40, 40, 0, -2*math.Pi)
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gc.SetFillRule(draw2d.FillRuleWinding)
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gc.SetFillColor(color.NRGBA{0, 0, 0xE5, 0xFF})
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gc.FillStroke(wheel1, wheel2)
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saveToPngFile("TestFillStyle", i)
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}
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func TestMultiSegmentCaps() {
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i, gc := initGc(w, h)
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gc.MoveTo(50.0, 75.0)
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gc.LineTo(200.0, 75.0)
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gc.MoveTo(50.0, 125.0)
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gc.LineTo(200.0, 125.0)
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gc.MoveTo(50.0, 175.0)
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gc.LineTo(200.0, 175.0)
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gc.SetLineWidth(30.0)
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gc.SetLineCap(draw2d.RoundCap)
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gc.Stroke()
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saveToPngFile("TestMultiSegmentCaps", i)
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}
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func TestRoundRectangle() {
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i, gc := initGc(w, h)
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/* a custom shape that could be wrapped in a function */
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x, y := 25.6, 25.6
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width, height := 204.8, 204.8
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aspect := 1.0 /* aspect ratio */
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corner_radius := height / 10.0 /* and corner curvature radius */
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radius := corner_radius / aspect
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degrees := math.Pi / 180.0
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gc.ArcTo(x+width-radius, y+radius, radius, radius, -90*degrees, 90*degrees)
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gc.ArcTo(x+width-radius, y+height-radius, radius, radius, 0*degrees, 90*degrees)
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gc.ArcTo(x+radius, y+height-radius, radius, radius, 90*degrees, 90*degrees)
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gc.ArcTo(x+radius, y+radius, radius, radius, 180*degrees, 90*degrees)
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gc.Close()
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gc.SetFillColor(color.NRGBA{0x80, 0x80, 0xFF, 0xFF})
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gc.SetStrokeColor(color.NRGBA{0x80, 0, 0, 0x80})
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gc.SetLineWidth(10.0)
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gc.FillStroke()
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saveToPngFile("TestRoundRectangle", i)
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}
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func TestLineCap() {
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i, gc := initGc(w, h)
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gc.SetLineWidth(30.0)
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gc.SetLineCap(draw2d.ButtCap)
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gc.MoveTo(64.0, 50.0)
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gc.LineTo(64.0, 200.0)
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gc.Stroke()
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gc.SetLineCap(draw2d.RoundCap)
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gc.MoveTo(128.0, 50.0)
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gc.LineTo(128.0, 200.0)
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gc.Stroke()
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gc.SetLineCap(draw2d.SquareCap)
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gc.MoveTo(192.0, 50.0)
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gc.LineTo(192.0, 200.0)
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gc.Stroke()
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/* draw helping lines */
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gc.SetStrokeColor(color.NRGBA{0xFF, 0x33, 0x33, 0xFF})
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gc.SetLineWidth(2.56)
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gc.MoveTo(64.0, 50.0)
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gc.LineTo(64.0, 200.0)
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gc.MoveTo(128.0, 50.0)
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gc.LineTo(128.0, 200.0)
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gc.MoveTo(192.0, 50.0)
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gc.LineTo(192.0, 200.0)
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gc.Stroke()
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saveToPngFile("TestLineCap", i)
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}
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func TestLineJoin() {
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i, gc := initGc(w, h)
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gc.SetLineWidth(40.96)
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gc.MoveTo(76.8, 84.48)
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gc.RLineTo(51.2, -51.2)
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gc.RLineTo(51.2, 51.2)
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gc.SetLineJoin(draw2d.MiterJoin) /* default */
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gc.Stroke()
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gc.MoveTo(76.8, 161.28)
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gc.RLineTo(51.2, -51.2)
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gc.RLineTo(51.2, 51.2)
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gc.SetLineJoin(draw2d.BevelJoin)
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gc.Stroke()
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gc.MoveTo(76.8, 238.08)
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gc.RLineTo(51.2, -51.2)
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gc.RLineTo(51.2, 51.2)
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gc.SetLineJoin(draw2d.RoundJoin)
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gc.Stroke()
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saveToPngFile("TestLineJoin", i)
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}
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func TestBubble() {
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i, gc := initGc(w, h)
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gc.BeginPath()
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gc.MoveTo(75, 25)
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gc.QuadCurveTo(25, 25, 25, 62.5)
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gc.QuadCurveTo(25, 100, 50, 100)
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gc.QuadCurveTo(50, 120, 30, 125)
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gc.QuadCurveTo(60, 120, 65, 100)
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gc.QuadCurveTo(125, 100, 125, 62.5)
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gc.QuadCurveTo(125, 25, 75, 25)
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gc.Stroke()
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saveToPngFile("TestBubble", i)
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}
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func TestStar() {
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i, gc := initGc(w, h)
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for i := 0.0; i < 360; i = i + 10 { // Go from 0 to 360 degrees in 10 degree steps
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gc.Save()
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gc.SetLineWidth(5) // Keep rotations temporary
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gc.Translate(144, 144)
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gc.Rotate(i * (math.Pi / 180.0)) // Rotate by degrees on stack from 'for'
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gc.MoveTo(0, 0)
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gc.LineTo(72, 0)
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gc.Stroke()
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gc.Restore()
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}
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saveToPngFile("TestStar", i)
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}
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func TestTransform() {
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i, gc := initGc(800, 600)
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gc.Save()
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gc.Translate(40, 40) // Set origin to (40, 40)
|
||||
gc.BeginPath()
|
||||
gc.MoveTo(0, 0)
|
||||
gc.RLineTo(72, 0)
|
||||
gc.RLineTo(0, 72)
|
||||
gc.RLineTo(-72, 0)
|
||||
gc.Close()
|
||||
gc.Stroke()
|
||||
gc.Restore()
|
||||
|
||||
gc.Save()
|
||||
gc.Translate(100, 150) // Translate origin to (100, 150)
|
||||
gc.Rotate(30 * (math.Pi / 180.0)) // Rotate counter-clockwise by 30 degrees
|
||||
gc.BeginPath()
|
||||
gc.MoveTo(0, 0)
|
||||
gc.RLineTo(72, 0)
|
||||
gc.RLineTo(0, 72)
|
||||
gc.RLineTo(-72, 0)
|
||||
gc.Close() // Draw box...
|
||||
gc.Stroke()
|
||||
gc.Restore()
|
||||
|
||||
gc.Save()
|
||||
gc.Translate(40, 300) // Translate to (40, 300)
|
||||
gc.Scale(0.5, 1) // Reduce x coord by 1/2, y coord left alone
|
||||
gc.BeginPath()
|
||||
gc.MoveTo(0, 0)
|
||||
gc.RLineTo(72, 0)
|
||||
gc.RLineTo(0, 72)
|
||||
gc.RLineTo(-72, 0)
|
||||
gc.Close() // Draw box...
|
||||
gc.Stroke()
|
||||
gc.Restore()
|
||||
|
||||
gc.Save()
|
||||
gc.Translate(300, 300) // Set origin to (300, 300)
|
||||
gc.Rotate(45 * (math.Pi / 180.0)) // Rotate coordinates by 45 degrees
|
||||
gc.Scale(0.5, 1) // Scale coordinates
|
||||
gc.BeginPath()
|
||||
gc.MoveTo(0, 0)
|
||||
gc.RLineTo(72, 0)
|
||||
gc.RLineTo(0, 72)
|
||||
gc.RLineTo(-72, 0)
|
||||
gc.Close() // Draw box
|
||||
gc.Stroke()
|
||||
gc.Restore()
|
||||
|
||||
saveToPngFile("TestTransform", i)
|
||||
}
|
||||
|
||||
func TestPathTransform() {
|
||||
i, gc := initGc(800, 600)
|
||||
gc.SetLineWidth(20)
|
||||
gc.Scale(1, 4)
|
||||
gc.ArcTo(200, 80, 50, 50, 0, math.Pi*2)
|
||||
gc.Close()
|
||||
gc.Stroke()
|
||||
saveToPngFile("TestPathTransform", i)
|
||||
}
|
||||
|
||||
func TestFillString() {
|
||||
draw2d.SetFontFolder("../../draw2d/resource/font/")
|
||||
i, gc := initGc(100, 100)
|
||||
draw2d.RoundRect(gc, 5, 5, 95, 95, 10, 10)
|
||||
gc.FillStroke()
|
||||
gc.SetFillColor(image.Black)
|
||||
gc.SetFontSize(18)
|
||||
gc.Translate(6, 52)
|
||||
gc.SetFontData(draw2d.FontData{"luxi", draw2d.FontFamilyMono, draw2d.FontStyleBold | draw2d.FontStyleItalic})
|
||||
width := gc.FillString("cou")
|
||||
gc.Translate(width+1, 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(3.0)
|
||||
gc.Stroke()
|
||||
gc.SetStrokeColor(image.Black)
|
||||
gc.SetLineWidth(1.0)
|
||||
gc.StrokeString("cou")
|
||||
saveToPngFile("TestFillString", i)
|
||||
}
|
||||
|
||||
func TestBigPicture() {
|
||||
i, gc := initGc(w, h)
|
||||
gc.SetLineWidth(10)
|
||||
|
||||
draw2d.Rect(gc, 0, 0, w, h)
|
||||
gc.Fill()
|
||||
saveToPngFile("TestBigPicture", i)
|
||||
}
|
||||
|
||||
func main() {
|
||||
TestRectangle()
|
||||
TestDrawArc()
|
||||
TestDrawArcNegative()
|
||||
TestCurveRectangle()
|
||||
TestDrawCubicCurve()
|
||||
TestDash()
|
||||
TestFillStroke()
|
||||
TestFillStyle()
|
||||
TestMultiSegmentCaps()
|
||||
TestRoundRectangle()
|
||||
TestLineCap()
|
||||
TestLineJoin()
|
||||
TestBubble()
|
||||
TestStar()
|
||||
TestTransform()
|
||||
TestPathTransform()
|
||||
TestFillString()
|
||||
TestBigPicture()
|
||||
}
|
||||
Loading…
Reference in a new issue