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Signed-off-by: Rahul Rudragoudar <rr83019@gmail.com>
This commit is contained in:
Rahul Rudragoudar 2021-04-20 03:07:35 +05:30
parent 3682b2cb7d
commit 8ea0652331
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GPG Key ID: 0D2CE231A7287EBC
1 changed files with 31 additions and 18 deletions
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49
src/main/java/lc/captchas/PoppingCharactersCaptcha.java
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@ -36,16 +36,18 @@ public class PoppingCharactersCaptcha implements ChallengeProvider {
advances.add(currX); advances.add(currX);
currX += font.getStringBounds(String.valueOf(c), frc).getWidth(); currX += font.getStringBounds(String.valueOf(c), frc).getWidth();
currX += spacing; currX += spacing;
}; }
;
graphics2D.dispose(); graphics2D.dispose();
return advances.toArray(new Integer[]{}); return advances.toArray(new Integer[] {});
} }
private BufferedImage makeImage(final Consumer<Graphics2D> f) { private BufferedImage makeImage(final Consumer<Graphics2D> f) {
final var img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); final var img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
final var graphics2D = img.createGraphics(); final var graphics2D = img.createGraphics();
graphics2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); graphics2D.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
graphics2D.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON); graphics2D.setRenderingHint(
RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
graphics2D.setFont(font); graphics2D.setFont(font);
f.accept(graphics2D); f.accept(graphics2D);
graphics2D.dispose(); graphics2D.dispose();
@ -63,21 +65,32 @@ public class PoppingCharactersCaptcha implements ChallengeProvider {
final var writer = new GifSequenceWriter(output, 1, 900, true); final var writer = new GifSequenceWriter(output, 1, 900, true);
final var advances = computeOffsets(text); final var advances = computeOffsets(text);
final var prevColor = Color.getHSBColor(0f, 0f, 0.1f); final var prevColor = Color.getHSBColor(0f, 0f, 0.1f);
IntStream.range(0, text.length()).forEach(i -> { IntStream.range(0, text.length())
final var color = Color.getHSBColor(HelperFunctions.randomNumber(0, 100)/100.0f, 0.6f, 1.0f); .forEach(
final var prevI = (i - 1 + text.length()) % text.length(); i -> {
final var nextImage = makeImage((g) -> { final var color =
g.setColor(prevColor); Color.getHSBColor(HelperFunctions.randomNumber(0, 100) / 100.0f, 0.6f, 1.0f);
g.drawString(String.valueOf(text.charAt(prevI)), advances[prevI] + jitter(), 45 + jitter()); final var prevI = (i - 1 + text.length()) % text.length();
g.setColor(color); final var nextImage =
g.drawString(String.valueOf(text.charAt(i)), advances[i] + jitter(), 45 + jitter()); makeImage(
}); (g) -> {
try { g.setColor(prevColor);
writer.writeToSequence(nextImage); g.drawString(
} catch (final IOException e) { String.valueOf(text.charAt(prevI)),
e.printStackTrace(); advances[prevI] + jitter(),
} 45 + jitter());
}); g.setColor(color);
g.drawString(
String.valueOf(text.charAt(i)),
advances[i] + jitter(),
45 + jitter());
});
try {
writer.writeToSequence(nextImage);
} catch (final IOException e) {
e.printStackTrace();
}
});
writer.close(); writer.close();
output.close(); output.close();
return byteArrayOutputStream.toByteArray(); return byteArrayOutputStream.toByteArray();