e5db4c4663
This CL adds the type Face that implements the font.Face interface. This CL also adds tests using gofont/goregular as an input font, using github.com/golang/freetype/truetype as reference values. Updates golang/go#22451. Change-Id: I2a6945309331b251ec2ddec95b6e809ad10aa116 Reviewed-on: https://go-review.googlesource.com/73870 Reviewed-by: Nigel Tao <nigeltao@golang.org>
91 lines
1.7 KiB
Go
91 lines
1.7 KiB
Go
// Copyright 2017 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package opentype
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import (
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"testing"
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"golang.org/x/image/font"
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"golang.org/x/image/font/gofont/goregular"
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"golang.org/x/image/font/sfnt"
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"golang.org/x/image/math/fixed"
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)
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var (
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regular font.Face
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)
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func init() {
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font, err := sfnt.Parse(goregular.TTF)
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if err != nil {
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panic(err)
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}
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regular, err = NewFace(font, defaultFaceOptions())
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if err != nil {
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panic(err)
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}
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}
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func TestFaceGlyphAdvance(t *testing.T) {
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for _, test := range []struct {
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r rune
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want fixed.Int26_6
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}{
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{' ', 213},
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{'A', 512},
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{'Á', 512},
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{'Æ', 768},
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{'i', 189},
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{'x', 384},
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} {
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got, ok := regular.GlyphAdvance(test.r)
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if !ok {
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t.Errorf("could not get glyph advance width for %q", test.r)
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continue
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}
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if got != test.want {
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t.Errorf("%q: glyph advance width=%d. want=%d", test.r, got, test.want)
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continue
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}
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}
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}
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func TestFaceKern(t *testing.T) {
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// FIXME(sbinet) there is no kerning with gofont/goregular
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for _, test := range []struct {
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r1, r2 rune
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want fixed.Int26_6
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}{
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{'A', 'A', 0},
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{'A', 'V', 0},
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{'V', 'A', 0},
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{'A', 'v', 0},
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{'W', 'a', 0},
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{'W', 'i', 0},
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{'Y', 'i', 0},
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{'f', '(', 0},
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{'f', 'f', 0},
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{'f', 'i', 0},
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{'T', 'a', 0},
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{'T', 'e', 0},
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} {
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got := regular.Kern(test.r1, test.r2)
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if got != test.want {
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t.Errorf("(%q, %q): glyph kerning=%d. want=%d", test.r1, test.r2, got, test.want)
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continue
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}
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}
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}
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func TestFaceMetrics(t *testing.T) {
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want := font.Metrics{Height: 768, Ascent: 726, Descent: 162}
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got := regular.Metrics()
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if got != want {
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t.Fatalf("metrics failed. got=%#v. want=%#v", got, want)
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}
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}
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