50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
package text
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import (
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"encoding/json"
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"os"
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"path/filepath"
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"testing"
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)
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func TestMonoAtlasGrid(t *testing.T) {
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paths, _ := filepath.Glob("../../engine/res/fonts/ui-mono-*.json")
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if len(paths) == 0 {
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t.Fatal("no mono atlas in engine/res/fonts, run genfont with -mono")
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}
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for _, p := range paths {
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data, err := os.ReadFile(p)
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if err != nil {
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t.Fatal(err)
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}
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var fj fontFileJSON
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if err := json.Unmarshal(data, &fj); err != nil {
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t.Fatalf("%s: %v", p, err)
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}
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f := NewFont(fj.Size, fj.Scale, fj.LineHeight, fj.Ascent)
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for _, g := range fj.Glyphs {
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f.SetGlyph(rune(g.C), FontGlyph{Advance: g.Advance})
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}
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for _, k := range fj.Kerning {
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f.SetKern(rune(k.A), rune(k.B), k.K)
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}
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adv := f.Advance('0')
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for r := rune(0x20); r <= 0x7E; r++ {
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if !f.Has(r) {
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t.Errorf("%s: missing %q", p, r)
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} else if f.Advance(r) != adv {
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t.Errorf("%s: %q advance %v, cell %v", p, r, f.Advance(r), adv)
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}
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}
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for _, r := range "→·…" {
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if !f.Has(r) {
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t.Errorf("%s: missing %q", p, r)
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}
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}
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const s = "{}[]()<>|&"
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if w := f.Measure(s).X; w != float32(len(s))*adv {
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t.Errorf("%s: %q width %v, want %v", p, s, w, float32(len(s))*adv)
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}
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}
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}
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