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filter challenge: scale font height based on image size

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This commit is contained in:
hrj 2022-04-02 22:51:45 +05:30
parent d7c1f9a4cc
commit cc8addb0c7
1 changed files with 7 additions and 9 deletions
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16
src/main/scala/lc/captchas/FilterChallenge.scala
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@ -41,23 +41,21 @@ class FilterChallenge extends ChallengeProvider {
val height = size2D(1)
val canvas = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB)
val g = canvas.createGraphics()
val fontHeight = (height*0.6).toInt
g.setColor(Color.WHITE)
g.fillRect(0, 0, canvas.getWidth, canvas.getHeight)
g.setColor(Color.BLACK)
g.setFont(new Font("Serif", Font.PLAIN, 30))
g.drawString(secret, 5, 30)
g.setFont(new Font("Serif", Font.PLAIN, fontHeight))
val stringWidth = g.getFontMetrics().stringWidth(secret)
val xOffset = ((width - stringWidth)*r.nextDouble).toInt
g.drawString(secret, xOffset, fontHeight)
g.dispose()
var image = ImmutableImage.fromAwt(canvas)
val s = scala.util.Random.nextInt(2)
val s = r.nextInt(2)
image = filterTypes(s).applyFilter(image)
val img = image.awt()
val baos = new ByteArrayOutputStream()
try {
PngImageWriter.write(baos, img);
} catch {
case e: Exception =>
e.printStackTrace()
}
PngImageWriter.write(baos, img);
new Challenge(baos.toByteArray, "image/png", secret)
}
def checkAnswer(secret: String, answer: String): Boolean = {