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rain drops: scale text to fit image size

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This commit is contained in:
hrj 2022-04-04 11:07:50 +05:30
parent f8626e3670
commit 3aeb258851
1 changed files with 13 additions and 7 deletions
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20
src/main/scala/lc/captchas/RainDropsCaptcha.scala
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@ -82,7 +82,8 @@ class RainDropsCP extends ChallengeProvider {
xOffset
)
val baseFont = new Font(Font.MONOSPACED, Font.BOLD, 80)
val fontHeight = (height * 0.5f).toInt
val baseFont = new Font(Font.MONOSPACED, Font.BOLD, fontHeight)
val attributes = new java.util.HashMap[TextAttribute, Object]()
attributes.put(TextAttribute.TRACKING, Double.box(0.2))
attributes.put(TextAttribute.WEIGHT, TextAttribute.WEIGHT_EXTRABOLD)
@ -119,17 +120,22 @@ class RainDropsCP extends ChallengeProvider {
}
}
// center the text
g.setFont(spacedFont)
val textWidth = g.getFontMetrics().charsWidth(secret.toCharArray, 0, secret.toCharArray.length)
val textX = (width - textWidth) / 2
val textWidth = g.getFontMetrics().stringWidth(secret)
val scaleX = if (textWidth > width) width / textWidth.toDouble else 1.0d
g.scale(scaleX, 1)
// paint the top outline
// center the text
val textX = if (textWidth > width) 0 else ((width - textWidth) / 2)
// this will be overlapped by the following text to show the top outline because of the offset
val yOffset = (fontHeight*0.01).ceil.toInt
g.setColor(textHighlightColor)
g.drawString(secret, textX, 69)
g.drawString(secret, textX, (fontHeight*1.1).toInt - yOffset)
// paint the text
g.setColor(textColor)
g.drawString(secret, textX, 70)
g.drawString(secret, textX, (fontHeight*1.1).toInt)
g.dispose()
writer.writeToSequence(canvas)