mirror of
https://github.com/hajimehoshi/ebiten.git
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97 lines
2.3 KiB
Go
97 lines
2.3 KiB
Go
// Copyright 2014 Hajime Hoshi
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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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// +build example
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package blocks
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import (
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"image/color"
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"io/ioutil"
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"log"
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"strings"
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"github.com/golang/freetype/truetype"
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"golang.org/x/image/font"
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"github.com/hajimehoshi/ebiten"
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"github.com/hajimehoshi/ebiten/ebitenutil"
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"github.com/hajimehoshi/ebiten/text"
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)
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const (
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arcadeFontBaseSize = 8
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)
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var (
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arcadeFonts = map[int]font.Face{}
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)
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func init() {
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f, err := ebitenutil.OpenFile("_resources/fonts/arcade_n.ttf")
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if err != nil {
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log.Fatal(err)
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}
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defer f.Close()
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b, err := ioutil.ReadAll(f)
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if err != nil {
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log.Fatal(err)
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}
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tt, err := truetype.Parse(b)
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if err != nil {
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log.Fatal(err)
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}
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for i := 1; i <= 4; i++ {
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const dpi = 72
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arcadeFonts[i] = truetype.NewFace(tt, &truetype.Options{
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Size: float64(arcadeFontBaseSize * i),
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DPI: dpi,
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Hinting: font.HintingFull,
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})
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}
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}
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func textWidth(str string) int {
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b, _ := font.BoundString(arcadeFonts[1], str)
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return (b.Max.X - b.Min.X).Ceil()
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}
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var (
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shadowColor = color.NRGBA{0, 0, 0, 0x80}
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)
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func drawTextWithShadow(rt *ebiten.Image, str string, x, y, scale int, clr color.Color) {
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offsetY := arcadeFontBaseSize * scale
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for _, line := range strings.Split(str, "\n") {
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y += offsetY
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text.Draw(rt, line, arcadeFonts[scale], x+1, y+1, shadowColor)
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text.Draw(rt, line, arcadeFonts[scale], x, y, clr)
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}
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}
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func drawTextWithShadowCenter(rt *ebiten.Image, str string, x, y, scale int, clr color.Color, width int) {
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w := textWidth(str) * scale
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x += (width - w) / 2
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drawTextWithShadow(rt, str, x, y, scale, clr)
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}
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func drawTextWithShadowRight(rt *ebiten.Image, str string, x, y, scale int, clr color.Color, width int) {
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w := textWidth(str) * scale
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x += width - w
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drawTextWithShadow(rt, str, x, y, scale, clr)
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}
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