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filter challenge: ensure that text fits within image width

This commit is contained in:
hrj 2022-04-03 16:45:33 +05:30
parent b33dd8adcf
commit 0c48f8fbd1
1 changed files with 6 additions and 2 deletions
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8
src/main/scala/lc/captchas/FilterChallenge.scala
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@ -47,9 +47,13 @@ class FilterChallenge extends ChallengeProvider {
g.setColor(Color.WHITE)
g.fillRect(0, 0, canvas.getWidth, canvas.getHeight)
g.setColor(Color.BLACK)
g.setFont(new Font("Serif", Font.PLAIN, fontHeight))
val font = new Font("Serif", Font.PLAIN, fontHeight)
g.setFont(font)
val stringWidth = g.getFontMetrics().stringWidth(secret)
val xOffset = ((width - stringWidth)*r.nextDouble).toInt
val scaleX = if (stringWidth > width) width/(stringWidth.toDouble) else 1d
val margin = if (stringWidth > width) 0 else (width - stringWidth)
val xOffset = (margin*r.nextDouble).toInt
g.scale(scaleX, 1d)
g.drawString(secret, xOffset, fontHeight)
g.dispose()
var image = ImmutableImage.fromAwt(canvas)