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Improve truecolor detection on windows #234

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Merged
ryanfowler merged 1 commit into from
Mar 16, 2025
Merged

Improve truecolor detection on windows #234

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14 changes: 11 additions & 3 deletions internal/image/block.go
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ import (
"image/color"
"io"
"os"
"runtime"
"strings"

"golang.org/x/term"
Expand Down Expand Up @@ -62,11 +63,18 @@ func writeBlocks(img image.Image) error {
return nil
}

// supportsTrueColor checks the COLORTERM environment variable.
// supportsTrueColor checks the current terminal emulator for true color support.
func supportsTrueColor() bool {
ct := os.Getenv("COLORTERM")
ct = strings.ToLower(ct)
return strings.Contains(ct, "truecolor") || strings.Contains(ct, "24bit")
if strings.EqualFold(ct, "truecolor") || strings.EqualFold(ct, "24bit") {
return true
}

if runtime.GOOS == "windows" {
return os.Getenv("WT_SESSION") != "" || os.Getenv("ConEmuANSI") == "ON"
}

return false
}

// imageBlockOutputDimensions returns the desired number of block columns and rows.
Expand Down
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