~whereswaldon/texture: all: initial commit

3 files changed, 364 insertions(+), 0 deletions(-)

A go.mod
A go.sum
A main.go

A  => go.mod +20 -0

@@ 1,20 @@
+module git.sr.ht/~whereswaldon/texture
+
+go 1.18
+
+require (
+	gioui.org v0.0.0-20220527093113-2a0a196d1ae4
+	golang.org/x/exp v0.0.0-20220518171630-0b5c67f07fdf
+)
+
+require (
+	gioui.org/cpu v0.0.0-20210817075930-8d6a761490d2 // indirect
+	gioui.org/shader v1.0.6 // indirect
+	github.com/benoitkugler/textlayout v0.1.1 // indirect
+	github.com/gioui/uax v0.2.1-0.20220325163150-e3d987515a12 // indirect
+	github.com/go-text/typesetting v0.0.0-20220411150340-35994bc27a7b // indirect
+	golang.org/x/exp/shiny v0.0.0-20220518171630-0b5c67f07fdf // indirect
+	golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d // indirect
+	golang.org/x/sys v0.0.0-20211019181941-9d821ace8654 // indirect
+	golang.org/x/text v0.3.7 // indirect
+)

A  => go.sum +98 -0

@@ 1,98 @@
+eliasnaur.com/font v0.0.0-20220124212145-832bb8fc08c3 h1:djFprmHZgrSepsHAIRMp5UJn3PzsoTg9drI+BDmif5Q=
+gioui.org v0.0.0-20220527093113-2a0a196d1ae4 h1:WSLf+06kJAqOUgD74YBpnnoDtmRXziKMILrQlvmDzJU=
+gioui.org v0.0.0-20220527093113-2a0a196d1ae4/go.mod h1:WHoHbUjH91BJS2xkfps2AhKxji+9o3xwfsphGsCBfnM=
+gioui.org/cpu v0.0.0-20210808092351-bfe733dd3334/go.mod h1:A8M0Cn5o+vY5LTMlnRoK3O5kG+rH0kWfJjeKd9QpBmQ=
+gioui.org/cpu v0.0.0-20210817075930-8d6a761490d2 h1:AGDDxsJE1RpcXTAxPG2B4jrwVUJGFDjINIPi1jtO6pc=
+gioui.org/cpu v0.0.0-20210817075930-8d6a761490d2/go.mod h1:A8M0Cn5o+vY5LTMlnRoK3O5kG+rH0kWfJjeKd9QpBmQ=
+gioui.org/shader v1.0.6 h1:cvZmU+eODFR2545X+/8XucgZdTtEjR3QWW6W65b0q5Y=
+gioui.org/shader v1.0.6/go.mod h1:mWdiME581d/kV7/iEhLmUgUK5iZ09XR5XpduXzbePVM=
+github.com/benoitkugler/pstokenizer v1.0.0/go.mod h1:l1G2Voirz0q/jj0TQfabNxVsa8HZXh/VMxFSRALWTiE=
+github.com/benoitkugler/textlayout v0.0.5/go.mod h1:puH4v13Uz7uIhIH0XMk5jgc8U3MXcn5r3VlV9K8n0D8=
+github.com/benoitkugler/textlayout v0.1.1 h1:hizE/085xAeY8q7gwV00uHR2Q27KYB2g1HW+UacXl68=
+github.com/benoitkugler/textlayout v0.1.1/go.mod h1:o+1hFV+JSHBC9qNLIuwVoLedERU7sBPgEFcuSgfvi/w=
+github.com/benoitkugler/textlayout-testdata v0.1.1 h1:AvFxBxpfrQd8v55qH59mZOJOQjtD6K2SFe9/HvnIbJk=
+github.com/cloudfoundry/jibber_jabber v0.0.0-20151120183258-bcc4c8345a21/go.mod h1:po7NpZ/QiTKzBKyrsEAxwnTamCoh8uDk/egRpQ7siIc=
+github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
+github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
+github.com/gioui/uax v0.2.1-0.20220325163150-e3d987515a12 h1:1bjaB/5IIicfKpP4k0s30T2WEw//Kh00zULa8DQ0cxA=
+github.com/gioui/uax v0.2.1-0.20220325163150-e3d987515a12/go.mod h1:kDhBRTA/i3H46PVdhqcw26TdGSIj42TOKNWKY+Kipnw=
+github.com/go-text/typesetting v0.0.0-20220411150340-35994bc27a7b h1:WINlj3ANt+CVrO2B4NGDHRlPvEWZPxjhb7z+JKypwXI=
+github.com/go-text/typesetting v0.0.0-20220411150340-35994bc27a7b/go.mod h1:ZNYu5saGoMOqtkVH5T8onTwhzenDUVszI+5WFHJRaxQ=
+github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
+github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
+github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
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+github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
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+github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
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+google.golang.org/protobuf v0.0.0-20200221191635-4d8936d0db64/go.mod h1:kwYJMbMJ01Woi6D6+Kah6886xMZcty6N08ah7+eCXa0=
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+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
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A  => main.go +246 -0

@@ 1,246 @@
+// SPDX-License-Identifier: Unlicense OR MIT
+
+package main
+
+// A simple Gio program. See https://gioui.org for more information.
+
+import (
+	"fmt"
+	"image/color"
+	"log"
+	"math/rand"
+	"os"
+	"time"
+
+	"gioui.org/app"
+	"gioui.org/f32"
+	"gioui.org/font/gofont"
+	"gioui.org/io/system"
+	"gioui.org/layout"
+	"gioui.org/op"
+	"gioui.org/op/clip"
+	"gioui.org/op/paint"
+	"gioui.org/widget"
+	"gioui.org/widget/material"
+	"golang.org/x/exp/constraints"
+)
+
+type line struct {
+	A, B f32.Point
+}
+
+func (l line) draw(canvas f32.Point, path *clip.Path) {
+	l.A.X *= canvas.X
+	l.A.Y *= canvas.Y
+	l.B.X *= canvas.X
+	l.B.Y *= canvas.Y
+
+	path.MoveTo(l.A)
+	path.LineTo(l.B)
+}
+
+func (l line) drawUnscaled(path *clip.Path) {
+	path.MoveTo(l.A)
+	path.LineTo(l.B)
+}
+
+func main() {
+	go func() {
+		w := app.NewWindow()
+		if err := loop(w); err != nil {
+			log.Fatal(err)
+		}
+		os.Exit(0)
+	}()
+	app.Main()
+}
+
+func randPoint() f32.Point {
+	point := f32.Point{
+		X: rand.Float32(),
+		Y: float32(rand.Intn(2)),
+	}
+	switch rand.Intn(2) {
+	case 0:
+		point.X, point.Y = point.Y, point.X
+	}
+	return point
+}
+
+func randLine() line {
+	return line{
+		A: randPoint(),
+		B: randPoint(),
+	}
+}
+
+func min[T constraints.Ordered](a, b T) T {
+	if a < b {
+		return a
+	}
+	return b
+}
+
+func max[T constraints.Ordered](a, b T) T {
+	if a > b {
+		return a
+	}
+	return b
+}
+
+type lineCanvas struct {
+	targetLines int
+	lineWidth   float32
+	lines       []line
+	init        bool
+}
+
+func (l *lineCanvas) Layout(gtx layout.Context) layout.Dimensions {
+	defer clip.Ellipse{
+		Max: f32.Point{
+			X: float32(gtx.Constraints.Max.X),
+			Y: float32(gtx.Constraints.Max.Y),
+		},
+	}.Push(gtx.Ops).Pop()
+	if !l.init {
+		if l.targetLines == 0 {
+			l.targetLines = 100
+		}
+		l.init = true
+		for i := 0; i < l.targetLines; i++ {
+			l.lines = append(l.lines, randLine())
+		}
+	}
+	if len(l.lines) > l.targetLines {
+		l.lines = l.lines[:l.targetLines]
+	}
+	for len(l.lines) < l.targetLines {
+		l.lines = append(l.lines, randLine())
+	}
+	canvas := f32.Point{
+		X: float32(gtx.Constraints.Max.X),
+		Y: float32(gtx.Constraints.Max.Y),
+	}
+
+	p := clip.Path{}
+	p.Begin(gtx.Ops)
+	for _, l := range l.lines {
+		l.draw(canvas, &p)
+	}
+	p.Close()
+	paint.FillShape(gtx.Ops, color.NRGBA{A: 255}, clip.Stroke{
+		Path:  p.End(),
+		Width: l.lineWidth,
+	}.Op())
+
+	return layout.Dimensions{Size: gtx.Constraints.Max}
+}
+
+type crosshatchCanvas struct {
+	lineWidth float32
+	lines     []line
+	init      bool
+	gap       int
+}
+
+func (l *crosshatchCanvas) Layout(gtx layout.Context) layout.Dimensions {
+	defer clip.Ellipse{
+		Max: f32.Point{
+			X: float32(gtx.Constraints.Max.X),
+			Y: float32(gtx.Constraints.Max.Y),
+		},
+	}.Push(gtx.Ops).Pop()
+	if !l.init {
+		if l.gap == 0 {
+			l.gap = 20
+		}
+		if l.lineWidth == 0 {
+			l.lineWidth = 1
+		}
+		l.init = true
+		for i := 0; i < max(gtx.Constraints.Max.X, gtx.Constraints.Max.Y)*2; i += l.gap {
+			l.lines = append(l.lines, line{
+				A: f32.Point{
+					X: float32(i),
+				},
+				B: f32.Point{
+					Y: float32(i),
+				},
+			})
+		}
+	}
+	p := clip.Path{}
+	p.Begin(gtx.Ops)
+	for _, l := range l.lines {
+		l.drawUnscaled(&p)
+	}
+	p.Close()
+	paint.FillShape(gtx.Ops, color.NRGBA{A: 255}, clip.Stroke{
+		Path:  p.End(),
+		Width: l.lineWidth,
+	}.Op())
+	defer op.Affine(f32.Affine2D{}.Scale(f32.Point{X: float32(gtx.Constraints.Max.X / 2)}, f32.Point{X: -1, Y: 1})).Push(gtx.Ops).Pop()
+	p = clip.Path{}
+	p.Begin(gtx.Ops)
+	for _, l := range l.lines {
+		l.drawUnscaled(&p)
+	}
+	p.Close()
+	paint.FillShape(gtx.Ops, color.NRGBA{A: 255}, clip.Stroke{
+		Path:  p.End(),
+		Width: l.lineWidth,
+	}.Op())
+
+	return layout.Dimensions{Size: gtx.Constraints.Max}
+}
+
+type (
+	C = layout.Context
+	D = layout.Dimensions
+)
+
+func loop(w *app.Window) error {
+	var ops op.Ops
+	th := material.NewTheme(gofont.Collection())
+	lc := lineCanvas{
+		targetLines: 100,
+	}
+	cc := crosshatchCanvas{}
+	var (
+		numLines  widget.Float
+		thickness widget.Float
+	)
+	for {
+		e := <-w.Events()
+		switch e := e.(type) {
+		case system.DestroyEvent:
+			return e.Err
+		case system.FrameEvent:
+			gtx := layout.NewContext(&ops, e)
+			if numLines.Changed() {
+				lc.targetLines = int(numLines.Value)
+			}
+			if thickness.Changed() {
+				lc.lineWidth = thickness.Value
+			}
+			layout.Flex{Axis: layout.Vertical}.Layout(gtx,
+				layout.Flexed(1, cc.Layout),
+				layout.Flexed(1, lc.Layout),
+				layout.Rigid(func(gtx C) D {
+					return layout.Flex{Alignment: layout.Middle}.Layout(gtx,
+						layout.Rigid(material.Body1(th, fmt.Sprintf("%d", int(numLines.Value))).Layout),
+						layout.Flexed(1, material.Slider(th, &numLines, 100, 1000).Layout),
+					)
+				}),
+				layout.Rigid(func(gtx C) D {
+					return layout.Flex{Alignment: layout.Middle}.Layout(gtx,
+						layout.Rigid(material.Body1(th, fmt.Sprintf("%d", int(thickness.Value))).Layout),
+						layout.Flexed(1, material.Slider(th, &thickness, 1, 10).Layout),
+					)
+				}),
+			)
+			e.Frame(gtx.Ops)
+			log.Println(time.Since(gtx.Now))
+		}
+	}
+}