|
| 1 | +// Copyright ©2021 The Gonum Authors. All rights reserved. |
| 2 | +// Use of this source code is governed by a BSD-style |
| 3 | +// license that can be found in the LICENSE file. |
| 4 | + |
| 5 | +package vgsvg_test |
| 6 | + |
| 7 | +import ( |
| 8 | + "log" |
| 9 | + "os" |
| 10 | + |
| 11 | + lmit "github.com/go-fonts/latin-modern/lmroman10italic" |
| 12 | + lreg "github.com/go-fonts/liberation/liberationserifregular" |
| 13 | + xfnt "golang.org/x/image/font" |
| 14 | + "golang.org/x/image/font/opentype" |
| 15 | + |
| 16 | + "gonum.org/v1/plot" |
| 17 | + "gonum.org/v1/plot/font" |
| 18 | + "gonum.org/v1/plot/plotter" |
| 19 | + "gonum.org/v1/plot/vg" |
| 20 | + "gonum.org/v1/plot/vg/draw" |
| 21 | + "gonum.org/v1/plot/vg/vgsvg" |
| 22 | +) |
| 23 | + |
| 24 | +func Example_embedFonts() { |
| 25 | + // Use Latin-Modern fonts. |
| 26 | + cmi10 := font.Font{Typeface: "Latin-Modern", Style: xfnt.StyleItalic} |
| 27 | + fnt, err := opentype.Parse(lmit.TTF) |
| 28 | + if err != nil { |
| 29 | + log.Fatalf("could not parse Latin-Modern fonts: %+v", err) |
| 30 | + } |
| 31 | + |
| 32 | + font.DefaultCache.Add([]font.Face{{ |
| 33 | + Font: cmi10, |
| 34 | + Face: fnt, |
| 35 | + }}) |
| 36 | + plot.DefaultFont = cmi10 |
| 37 | + |
| 38 | + p := plot.New() |
| 39 | + p.Title.Text = "Scatter plot" |
| 40 | + p.X.Label.Text = "x-Axis" |
| 41 | + p.Y.Label.Text = "y-Axis" |
| 42 | + |
| 43 | + scatter, err := plotter.NewScatter(plotter.XYs{{X: 1, Y: 1}, {X: 0, Y: 1}, {X: 0, Y: 0}}) |
| 44 | + if err != nil { |
| 45 | + log.Fatalf("could not create scatter: %v", err) |
| 46 | + } |
| 47 | + p.Add(scatter) |
| 48 | + |
| 49 | + c := vgsvg.NewWith( |
| 50 | + vgsvg.UseWH(5*vg.Centimeter, 5*vg.Centimeter), |
| 51 | + vgsvg.EmbedFonts(true), |
| 52 | + ) |
| 53 | + p.Draw(draw.New(c)) |
| 54 | + |
| 55 | + f, err := os.Create("testdata/embed_fonts.svg") |
| 56 | + if err != nil { |
| 57 | + log.Fatalf("could not create output SVG file: %+v", err) |
| 58 | + } |
| 59 | + defer f.Close() |
| 60 | + |
| 61 | + _, err = c.WriteTo(f) |
| 62 | + if err != nil { |
| 63 | + log.Fatalf("could not write output SVG plot: %+v", err) |
| 64 | + } |
| 65 | + |
| 66 | + err = f.Close() |
| 67 | + if err != nil { |
| 68 | + log.Fatalf("could not close output SVG file: %v", err) |
| 69 | + } |
| 70 | +} |
| 71 | + |
| 72 | +func Example_standardFonts() { |
| 73 | + // Use standard fonts. |
| 74 | + tms := font.Font{Typeface: "Times"} |
| 75 | + fnt, err := opentype.Parse(lreg.TTF) |
| 76 | + if err != nil { |
| 77 | + log.Fatalf("could not parse Times fonts: %+v", err) |
| 78 | + } |
| 79 | + |
| 80 | + font.DefaultCache.Add([]font.Face{{ |
| 81 | + Font: tms, |
| 82 | + Face: fnt, |
| 83 | + }}) |
| 84 | + plot.DefaultFont = tms |
| 85 | + |
| 86 | + p := plot.New() |
| 87 | + p.Title.Text = "Scatter plot" |
| 88 | + p.X.Label.Text = "x-Axis" |
| 89 | + p.Y.Label.Text = "y-Axis" |
| 90 | + |
| 91 | + scatter, err := plotter.NewScatter(plotter.XYs{{X: 1, Y: 1}, {X: 0, Y: 1}, {X: 0, Y: 0}}) |
| 92 | + if err != nil { |
| 93 | + log.Fatalf("could not create scatter: %v", err) |
| 94 | + } |
| 95 | + p.Add(scatter) |
| 96 | + |
| 97 | + err = p.Save(5*vg.Centimeter, 5*vg.Centimeter, "testdata/standard_fonts.svg") |
| 98 | + if err != nil { |
| 99 | + log.Fatalf("could not save SVG plot: %+v", err) |
| 100 | + } |
| 101 | +} |
0 commit comments