Start work on emoji (mostly to be scrapped tho)
This commit is contained in:
parent
1d07a50459
commit
752f9e4be4
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@ -0,0 +1,2 @@
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noto_emojis
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example/emojis/out.png
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@ -0,0 +1,76 @@
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package freetype
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import (
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"errors"
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"fmt"
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"strings"
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"unicode/utf8"
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)
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type Emoji struct {
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Codepoints []rune
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Bytes int
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}
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var (
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errNotAnEmoji = errors.New("not an emoji")
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)
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func inrange(val, min, max rune) bool {
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return val >= min && val < max
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}
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// https://stackoverflow.com/questions/30757193/find-out-if-character-in-string-is-emoji/39425959
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func isEmoji(chr rune) bool {
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switch {
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case inrange(chr, 0x1f600, 0x1f64f), // Emoticons
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inrange(chr, 0x1f300, 0x1f5ff), // Misc Symbols and Pictographs
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inrange(chr, 0x1f680, 0x1f6ff), // Transport and Map
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inrange(chr, 0x1f1e6, 0x1f1ff), // Regional country flags
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inrange(chr, 0x2600, 0x26ff), // Misc symbols
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inrange(chr, 0x2700, 0x27bf), // Dingbats
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inrange(chr, 0xfe00, 0xfe0f), // Variation Selectors
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inrange(chr, 0x1f900, 0x1f9ff), // Supplemental Symbols and Pictographs
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inrange(chr, 127000, 127600), // Various asian characters
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inrange(chr, 65024, 65039), // Variation selector
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inrange(chr, 9100, 9300), // Misc items
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inrange(chr, 8400, 8447): // Combining Diacritical Marks for Symbols
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return true
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}
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return false
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}
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func isZWJ(chr rune) bool {
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return chr == 8205
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}
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func parseEmoji(str string) (Emoji, error) {
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if len(str) < 1 {
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return Emoji{}, errNotAnEmoji
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}
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emoji := Emoji{}
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for _, r := range str {
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// Check if rune is emoji
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if !isEmoji(r) && !isZWJ(r) {
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if len(emoji.Codepoints) < 1 {
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return emoji, errNotAnEmoji
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}
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break
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}
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emoji.Codepoints = append(emoji.Codepoints, r)
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emoji.Bytes += utf8.RuneLen(r)
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}
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return emoji, nil
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}
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func (e Emoji) String() string {
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codepoints := []string{}
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for _, cp := range e.Codepoints {
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codepoints = append(codepoints, fmt.Sprintf("%U", cp))
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}
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return "Emoji(" + strings.Join(codepoints, ", ") + ")"
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}
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@ -0,0 +1,124 @@
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// Copyright 2010 The Freetype-Go Authors. All rights reserved.
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// Use of this source code is governed by your choice of either the
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// FreeType License or the GNU General Public License version 2 (or
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// any later version), both of which can be found in the LICENSE file.
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// +build example
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//
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// This build tag means that "go install github.com/golang/freetype/..."
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// doesn't install this example program. Use "go run main.go" to run it or "go
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// install -tags=example" to install it.
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package main
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import (
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"bufio"
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"flag"
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"fmt"
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"image"
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"image/color"
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"image/draw"
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"image/png"
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"io/ioutil"
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"log"
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"os"
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"git.fromouter.space/crunchy-rocks/freetype"
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"golang.org/x/image/font"
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)
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var (
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dpi = flag.Float64("dpi", 72, "screen resolution in Dots Per Inch")
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fontfile = flag.String("fontfile", "../../testdata/luxisr.ttf", "filename of the ttf font")
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hinting = flag.String("hinting", "none", "none | full")
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size = flag.Float64("size", 20, "font size in points")
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spacing = flag.Float64("spacing", 1.5, "line spacing (e.g. 2 means double spaced)")
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wonb = flag.Bool("whiteonblack", false, "white text on a black background")
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)
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var text = []string{
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"Single glyph emoji: 😂",
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"Gender-modified emoji: 💂♀️",
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"Skin-modified emoji: 🖐🏽",
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"Mixed emoji: 👩👩👧👧",
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"👌👀👌👀👌👀👌👀👌👀 good shit go౦ԁ sHit👌 thats ✔ some good👌👌shit right👌👌",
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"th 👌 ere👌👌👌 right✔there ✔✔if i do ƽaү so my self 💯 i say so ",
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"💯 thats what im talking about right there right there (chorus: ʳᶦᵍʰᵗ ᵗʰᵉʳᵉ)",
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"mMMMMᎷМ💯 👌👌 👌НO0ОଠOOOOOОଠଠOoooᵒᵒᵒᵒᵒᵒᵒᵒᵒ👌 👌👌 👌 💯 👌 👀 👀 👀 👌👌Good shit",
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}
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func main() {
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flag.Parse()
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// Read the font data.
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fontBytes, err := ioutil.ReadFile(*fontfile)
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if err != nil {
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log.Println(err)
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return
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}
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f, err := freetype.ParseFont(fontBytes)
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if err != nil {
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log.Println(err)
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return
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}
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// Initialize the context.
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fg, bg := image.Black, image.White
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ruler := color.RGBA{0xdd, 0xdd, 0xdd, 0xff}
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if *wonb {
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fg, bg = image.White, image.Black
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ruler = color.RGBA{0x22, 0x22, 0x22, 0xff}
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}
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rgba := image.NewRGBA(image.Rect(0, 0, 640, 480))
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draw.Draw(rgba, rgba.Bounds(), bg, image.ZP, draw.Src)
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c := freetype.NewContext()
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c.SetDPI(*dpi)
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c.SetFont(f)
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c.SetFontSize(*size)
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c.SetClip(rgba.Bounds())
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c.SetDst(rgba)
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c.SetSrc(fg)
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switch *hinting {
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default:
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c.SetHinting(font.HintingNone)
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case "full":
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c.SetHinting(font.HintingFull)
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}
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// Draw the guidelines.
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for i := 0; i < 200; i++ {
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rgba.Set(10, 10+i, ruler)
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rgba.Set(10+i, 10, ruler)
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}
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// Draw the text.
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pt := freetype.Pt(10, 10+int(c.PointToFixed(*size)>>6))
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for _, s := range text {
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_, err = c.DrawString(s, pt)
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if err != nil {
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log.Println(err)
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return
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}
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pt.Y += c.PointToFixed(*size * *spacing)
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}
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// Save that RGBA image to disk.
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outFile, err := os.Create("out.png")
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if err != nil {
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log.Println(err)
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os.Exit(1)
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}
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defer outFile.Close()
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b := bufio.NewWriter(outFile)
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err = png.Encode(b, rgba)
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if err != nil {
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log.Println(err)
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os.Exit(1)
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}
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err = b.Flush()
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if err != nil {
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log.Println(err)
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os.Exit(1)
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}
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fmt.Println("Wrote out.png OK.")
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}
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18
freetype.go
18
freetype.go
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@ -10,6 +10,7 @@ package freetype // import "git.fromouter.space/crunchy-rocks/freetype"
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import (
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import (
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"errors"
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"errors"
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"fmt"
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"image"
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"image"
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"image/draw"
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"image/draw"
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@ -232,8 +233,21 @@ func (c *Context) DrawString(s string, p fixed.Point26_6) (fixed.Point26_6, erro
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return fixed.Point26_6{}, errors.New("freetype: DrawText called with a nil font")
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return fixed.Point26_6{}, errors.New("freetype: DrawText called with a nil font")
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}
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}
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prev, hasPrev := truetype.Index(0), false
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prev, hasPrev := truetype.Index(0), false
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for _, rune := range s {
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nextchar := 0
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index := c.f.Index(rune)
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for index, r := range s {
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// Check if we need to skip entries
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if nextchar > index {
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continue
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}
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// Check if rune is an emoji
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if isEmoji(r) {
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emoji, err := parseEmoji(s[index:])
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if err == nil {
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fmt.Println("Found emoji:", emoji)
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nextchar = index + emoji.Bytes
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}
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}
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index := c.f.Index(r)
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if hasPrev {
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if hasPrev {
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kern := c.f.Kern(c.scale, prev, index)
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kern := c.f.Kern(c.scale, prev, index)
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if c.hinting != font.HintingNone {
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if c.hinting != font.HintingNone {
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