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Improve ascii stream for any one symbol

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This commit is contained in:
Alex X
2024-05-16 17:33:09 +03:00
parent 83c0053b2c
commit 6d967bc1f9
2 changed files with 19 additions and 23 deletions
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35
pkg/ascii/ascii.go
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@@ -61,35 +61,30 @@ func NewWriter(w io.Writer, foreground, background, text string) io.Writer {
}
}
var ascii string
switch text {
case "":
ascii = ` .::--~~==++**##%%$@`
case " ":
a.text = func(r, g, b uint32) {
a.buf = append(a.buf, ' ')
if len(text) == 1 {
// fast 1 symbol version
a.text = func(_, _, _ uint32) {
a.buf = append(a.buf, text[0])
}
case " ":
a.text = func(r, g, b uint32) {
a.buf = append(a.buf, ' ', ' ')
} else {
switch text {
case "":
text = ` .::--~~==++**##%%$@` // default for empty text
case "block":
text = " ░░▒▒▓▓█" // https://en.wikipedia.org/wiki/Block_Elements
}
case "block":
ascii = " ░░▒▒▓▓█" // https://en.wikipedia.org/wiki/Block_Elements
default:
ascii = text
}
if ascii != "" {
if runes := []rune(ascii); len(runes) != len(ascii) {
if runes := []rune(text); len(runes) != len(text) {
k := float32(len(runes)-1) / 255
a.text = func(r, g, b uint32) {
i := gray(r, g, b, k)
a.buf = utf8.AppendRune(a.buf, runes[i])
}
} else {
k := float32(len(ascii)-1) / 255
k := float32(len(text)-1) / 255
a.text = func(r, g, b uint32) {
i := gray(r, g, b, k)
a.buf = append(a.buf, ascii[i])
a.buf = append(a.buf, text[i])
}
}
}
@@ -130,7 +125,7 @@ func (a *writer) Write(p []byte) (n int, err error) {
a.buf = append(a.buf, '\n')
}
a.buf = append(a.buf, "\033[0m\n"...)
a.buf = append(a.buf, "\033[0m"...)
if n, err = a.wr.Write(a.buf); err == nil {
a.wr.(http.Flusher).Flush()