39 lines
995 B
Go
39 lines
995 B
Go
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// Copyright 2018 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package text
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import (
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"golang.org/x/image/font"
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"golang.org/x/image/math/fixed"
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)
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var glyphAdvanceCache = map[font.Face]map[rune]fixed.Int26_6{}
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func glyphAdvance(face font.Face, r rune) fixed.Int26_6 {
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m, ok := glyphAdvanceCache[face]
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if !ok {
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m = map[rune]fixed.Int26_6{}
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glyphAdvanceCache[face] = m
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}
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a, ok := m[r]
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if !ok {
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a, _ = face.GlyphAdvance(r)
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m[r] = a
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}
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return a
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}
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