purplecrayon_test.go

package purplecrayon_test

import (
	pc "github.com/jordan-bonecutter/purplecrayon"
	_ "github.com/jordan-bonecutter/purplecrayon/svg"
	"log"
	"os"
)

func Example() {
	canv, err := pc.NewCanvas("svg", 1920, 1080, os.Stdout)
	if err != nil {
		log.Fatalf("Failed opening canvas: %s\n", err)
	}
	defer canv.Close()

	rect := canv.Rect()
	rect.Width(100).Height(100).TopLeft(pc.Point{X: 400, Y: 500})
	rect.FillRGB(pc.RGB{R: 255, G: 0, B: 0})
	rect.Close()

	gradient := canv.LinearGradient()
	gradient.SetLine(pc.Point{X: 0, Y: 0}, pc.Point{X: 1, Y: 1})
	stops := gradient.GradientStops()
	stops.Stop().Position(0.1).RGBA(pc.RGBA{R: 255, G: 120, B: 0, A: 127}).Finish()
	stops.Stop().Position(0.9).RGBA(pc.RGBA{R: 255, G: 0, B: 120, A: 255}).Finish()
	stops.Finish()
	ref := gradient.Close()

	circle := canv.Circle().Center(pc.Point{X: 1920 / 2, Y: 1080 / 2}).Radius(400)
	circle.Fill(ref)
	circle.Close()

	// Output:
	// <svg id="pcobj-0" width="1920" height="1080" xmlns="http://www.w3.org/2000/svg">
	// <!-- Generated by purplecrayon -->
	// <rect id="pcobj-1" width="100" height="100" x="400" y="500" fill="rgb(255,0,0)"/>
	// <linearGradient id="pcobj-2" x1="0" y1="0" x2="1" y2="1">
	// <stop id="pcobj-3" offset="10%" stop-color="rgba(255,120,0,127)"/>
	// <stop id="pcobj-4" offset="90%" stop-color="rgba(255,0,120,255)"/></linearGradient>
	// <circle id="pcobj-5" cx="960" cy="540" r="400" fill="url(#pcobj-2)"/></svg>
}