Adam Van Ymeren
7a04f298d2
- update to latest telegram layer - remove some references to fields in tg.Entities that don't exist in the schema - originally added here: https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e - referenced here - https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3 - https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e
46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
package thumbnail
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import (
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"strconv"
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)
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// DecodePath decodes vector thumbnail from thumbnail bytes (e.g. tg.PhotoPathSize with type "j").
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//
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// See DecodePathTo.
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func DecodePath(data []byte) []byte {
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return DecodePathTo(data, nil)
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}
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// DecodePathTo decodes vector thumbnail to given slice.
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//
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// Returned path will contain the actual SVG path that can
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// be directly inserted in the d attribute of an svg <path> element:
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//
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// <?xml version="1.0" encoding="utf-8"?>
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// <svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"
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// viewBox="0 0 512 512" xml:space="preserve">
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// <path d="{$path}"/>
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// </svg>
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//
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// See https://core.telegram.org/api/files#vector-thumbnails.
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func DecodePathTo(data, to []byte) []byte {
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const (
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lookup = "AACAAAAHAAALMAAAQASTAVAAAZaacaaaahaaalmaaaqastava.az0123456789-,"
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)
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to = append(to, 'M')
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for _, num := range data {
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if num >= 128+64 {
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to = append(to, lookup[int(num-128-64)])
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} else {
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if num >= 128 {
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to = append(to, ',')
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} else if num >= 64 {
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to = append(to, '-')
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}
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to = strconv.AppendInt(to, int64(num&63), 10)
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}
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}
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to = append(to, 'z')
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return to
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}
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