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Fix blinking for ASCII stream

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This commit is contained in:
Alex X
2024-05-16 15:06:26 +03:00
parent ecfd7404f5
commit 83c0053b2c
1 changed files with 9 additions and 3 deletions
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12
pkg/ascii/ascii.go
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@@ -10,7 +10,11 @@ import (
) )
func NewWriter(w io.Writer, foreground, background, text string) io.Writer { func NewWriter(w io.Writer, foreground, background, text string) io.Writer {
a := &writer{wr: w, buf: []byte(clearScreen)} // once clear screen
_, _ = w.Write([]byte(csiClear))
// every frame - move to home
a := &writer{wr: w, buf: []byte(csiHome)}
var idx0 uint8 var idx0 uint8
@@ -47,6 +51,7 @@ func NewWriter(w io.Writer, foreground, background, text string) io.Writer {
case "256": case "256":
a.color = func(r, g, b uint8) { a.color = func(r, g, b uint8) {
if idx := xterm256color(r, g, b, 255); idx != idx0 { if idx := xterm256color(r, g, b, 255); idx != idx0 {
idx0 = idx
a.buf = append(a.buf, fmt.Sprintf("\033[48;5;%dm", idx)...) a.buf = append(a.buf, fmt.Sprintf("\033[48;5;%dm", idx)...)
} }
} }
@@ -100,7 +105,8 @@ type writer struct {
} }
// https://stackoverflow.com/questions/37774983/clearing-the-screen-by-printing-a-character // https://stackoverflow.com/questions/37774983/clearing-the-screen-by-printing-a-character
const clearScreen = "\033[2J" + "\033[H" const csiClear = "\033[2J"
const csiHome = "\033[H"
func (a *writer) Write(p []byte) (n int, err error) { func (a *writer) Write(p []byte) (n int, err error) {
img, err := jpeg.Decode(bytes.NewReader(p)) img, err := jpeg.Decode(bytes.NewReader(p))
@@ -108,7 +114,7 @@ func (a *writer) Write(p []byte) (n int, err error) {
return 0, err return 0, err
} }
a.buf = a.buf[:len(clearScreen)] a.buf = a.buf[:len(csiHome)]
w := img.Bounds().Dy() w := img.Bounds().Dy()
h := img.Bounds().Dx() h := img.Bounds().Dx()