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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package opentype
import (
"testing"
"golang.org/x/image/font"
"golang.org/x/image/font/gofont/goregular"
"golang.org/x/image/font/sfnt"
"golang.org/x/image/math/fixed"
)
var (
regular font.Face
)
func init() {
font, err := sfnt.Parse(goregular.TTF)
if err != nil {
panic(err)
}
regular, err = NewFace(font, defaultFaceOptions())
if err != nil {
panic(err)
}
}
func TestFaceGlyphAdvance(t *testing.T) {
for _, test := range []struct {
r rune
want fixed.Int26_6
}{
{' ', 213},
{'A', 512},
{'Á', 512},
{'Æ', 768},
{'i', 189},
{'x', 384},
} {
got, ok := regular.GlyphAdvance(test.r)
if !ok {
t.Errorf("could not get glyph advance width for %q", test.r)
continue
}
if got != test.want {
t.Errorf("%q: glyph advance width=%d. want=%d", test.r, got, test.want)
continue
}
}
}
func TestFaceKern(t *testing.T) {
// FIXME(sbinet) there is no kerning with gofont/goregular
for _, test := range []struct {
r1, r2 rune
want fixed.Int26_6
}{
{'A', 'A', 0},
{'A', 'V', 0},
{'V', 'A', 0},
{'A', 'v', 0},
{'W', 'a', 0},
{'W', 'i', 0},
{'Y', 'i', 0},
{'f', '(', 0},
{'f', 'f', 0},
{'f', 'i', 0},
{'T', 'a', 0},
{'T', 'e', 0},
} {
got := regular.Kern(test.r1, test.r2)
if got != test.want {
t.Errorf("(%q, %q): glyph kerning=%d. want=%d", test.r1, test.r2, got, test.want)
continue
}
}
}
func TestFaceMetrics(t *testing.T) {
want := font.Metrics{Height: 768, Ascent: 726, Descent: 162}
got := regular.Metrics()
if got != want {
t.Fatalf("metrics failed. got=%#v. want=%#v", got, want)
}
}
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