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Rename DPISetter to PngImageWritter

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Make fn static

Signed-off-by: Rahul Rudragoudar <rr83019@gmail.com>
This commit is contained in:
Rahul Rudragoudar 2021-09-01 22:57:26 +05:30
parent 26d86bca4c
commit f83289514b
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GPG Key ID: 0D2CE231A7287EBC
5 changed files with 13 additions and 17 deletions
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5
src/main/java/lc/captchas/FontFunCaptcha.java
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@ -9,7 +9,7 @@ import java.util.Map;
import java.util.List;
import lc.captchas.interfaces.Challenge;
import lc.captchas.interfaces.ChallengeProvider;
import lc.misc.DPISetter;
import lc.misc.PngImageWriter;
import lc.misc.HelperFunctions;
public class FontFunCaptcha implements ChallengeProvider {
@ -74,8 +74,7 @@ public class FontFunCaptcha implements ChallengeProvider {
graphics2D.dispose();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
DPISetter dpi = new DPISetter();
dpi.setDPI(baos, img);
PngImageWriter.write(baos, img);
} catch (Exception e) {
e.printStackTrace();
}

5
src/main/java/lc/captchas/ShadowTextCaptcha.java
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@ -13,7 +13,7 @@ import java.util.Map;
import java.util.List;
import lc.misc.HelperFunctions;
import lc.misc.DPISetter;
import lc.misc.PngImageWriter;
import lc.captchas.interfaces.Challenge;
import lc.captchas.interfaces.ChallengeProvider;
@ -67,8 +67,7 @@ public class ShadowTextCaptcha implements ChallengeProvider {
g2d.dispose();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
try {
DPISetter dpi = new DPISetter();
dpi.setDPI(baos, img2);
PngImageWriter.write(baos, img2);
} catch (Exception e) {
e.printStackTrace();
}

10
src/main/java/lc/misc/DPISetter.java → src/main/java/lc/misc/PngImageWriter.java
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@ -15,12 +15,12 @@ import javax.imageio.metadata.IIOMetadataNode;
import javax.imageio.stream.ImageOutputStream;
import java.awt.image.BufferedImage;
public class DPISetter {
public class PngImageWriter {
final int DPI = 245;
final double INCH_2_CM = 2.54;
static final int DPI = 245;
static final double INCH_2_CM = 2.54;
public void setDPI(ByteArrayOutputStream boas, BufferedImage gridImage) throws IOException {
public static void write(ByteArrayOutputStream boas, BufferedImage gridImage) throws IOException {
final String formatName = "png";
for (Iterator<ImageWriter> iw = ImageIO.getImageWritersByFormatName(formatName);
iw.hasNext(); ) {
@ -45,7 +45,7 @@ public class DPISetter {
}
}
public void setDPIMeta(IIOMetadata metadata) throws IIOInvalidTreeException {
private static void setDPIMeta(IIOMetadata metadata) throws IIOInvalidTreeException {
// for PNG, it's dots per millimeter
double dotsPerMilli = 1.0 * DPI / 10 / INCH_2_CM;

5
src/main/scala/lc/captchas/DebugCaptcha.scala
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@ -11,7 +11,7 @@ import java.util.List
import lc.misc.HelperFunctions
import lc.captchas.interfaces.Challenge
import lc.captchas.interfaces.ChallengeProvider
import lc.misc.DPISetter
import lc.misc.PngImageWriter
/** This captcha is only for debugging purposes. It creates very simple captchas that are deliberately easy to solve with OCR engines */
class DebugCaptcha extends ChallengeProvider {
@ -53,8 +53,7 @@ class DebugCaptcha extends ChallengeProvider {
graphics2D.dispose()
val baos = new ByteArrayOutputStream()
try {
val dpi = new DPISetter();
dpi.setDPI(baos, img);
PngImageWriter.write(baos, img);
} catch {
case e: Exception =>
e.printStackTrace()

5
src/main/scala/lc/captchas/LabelCaptcha.scala
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@ -10,7 +10,7 @@ import java.awt.Color
import lc.captchas.interfaces.ChallengeProvider
import lc.captchas.interfaces.Challenge
import java.util.{List => JavaList, Map => JavaMap}
import lc.misc.DPISetter
import lc.misc.PngImageWriter
class LabelCaptcha extends ChallengeProvider {
private var knownFiles = new File("known").list.toList
@ -50,8 +50,7 @@ class LabelCaptcha extends ChallengeProvider {
val token = encrypt(knownImageFile + "," + unknownImageFile)
val baos = new ByteArrayOutputStream()
val dpi = new DPISetter();
dpi.setDPI(baos, mergedImage);
PngImageWriter.write(baos, mergedImage);
new Challenge(baos.toByteArray(), "image/png", token)
}