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preview with 50% alpha

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This commit is contained in:
Patrick Haßel 2023-02-23 10:05:45 +01:00
parent ea9de93db8
commit 65b433b138
3 changed files with 26 additions and 10 deletions
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18
src/main/java/de/ph87/kindermalen/ImageResizer.java → src/main/java/de/ph87/kindermalen/ImageHelper.java
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@ -5,8 +5,24 @@ import com.mortennobel.imagescaling.ResampleOp;
import java.awt.*; import java.awt.*;
import java.awt.image.BufferedImage; import java.awt.image.BufferedImage;
import java.awt.image.WritableRaster;
public class ImageResizer { public class ImageHelper {
public static BufferedImage COPY(final BufferedImage source) {
final BufferedImage copy = new BufferedImage(source.getWidth(), source.getHeight(), source.getType());
source.copyData(copy.getRaster());
return copy;
}
public static void ALPHA(final BufferedImage image, final double alpha) {
final WritableRaster raster = image.getAlphaRaster();
for (int y = 0; y < raster.getHeight(); y++) {
for (int x = 0; x < raster.getWidth(); x++) {
raster.setSample(x, y, 0, raster.getSample(x, y, 0) * alpha);
}
}
}
public static BufferedImage RESIZE(final BufferedImage image, final int maxWidth, final int maxHeight) { public static BufferedImage RESIZE(final BufferedImage image, final int maxWidth, final int maxHeight) {
final Point size = fitInsideBox(image, maxWidth, maxHeight); final Point size = fitInsideBox(image, maxWidth, maxHeight);

2
src/main/java/de/ph87/kindermalen/tool/stamp/Stamp.java
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@ -11,7 +11,7 @@ import java.io.IOException;
import java.util.HashMap; import java.util.HashMap;
import java.util.Map; import java.util.Map;
import static de.ph87.kindermalen.ImageResizer.RESIZE; import static de.ph87.kindermalen.ImageHelper.RESIZE;
@Slf4j @Slf4j
@Getter @Getter

16
src/main/java/de/ph87/kindermalen/tool/stamp/StampTool.java
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@ -13,7 +13,7 @@ import java.util.ArrayList;
import java.util.List; import java.util.List;
import java.util.Objects; import java.util.Objects;
import static de.ph87.kindermalen.ImageResizer.RESIZE; import static de.ph87.kindermalen.ImageHelper.*;
import static de.ph87.kindermalen.tool.stamp.ListHelper.SYNC; import static de.ph87.kindermalen.tool.stamp.ListHelper.SYNC;
@Slf4j @Slf4j
@ -36,6 +36,9 @@ public class StampTool extends Tool {
private BufferedImage prepared; private BufferedImage prepared;
@Getter
private BufferedImage preview;
public StampTool() { public StampTool() {
super("Stempel"); super("Stempel");
final List<File> files = scan(STAMPS_DIR); final List<File> files = scan(STAMPS_DIR);
@ -86,9 +89,11 @@ public class StampTool extends Tool {
if (this.stamp == null || stamp.getOriginal() == null) { if (this.stamp == null || stamp.getOriginal() == null) {
return; return;
} }
this.prepared = RESIZE(stamp.getOriginal(), size, size); prepared = RESIZE(stamp.getOriginal(), size, size);
preview = COPY(prepared);
ALPHA(preview, 0.5);
ALPHA(prepared, alpha);
log.info("Stamp prepared: {}", stamp.getName()); log.info("Stamp prepared: {}", stamp.getName());
// TODO apply alpha
} }
@Override @Override
@ -110,9 +115,4 @@ public class StampTool extends Tool {
destination.getGraphics().drawImage(prepared, point.intX() - prepared.getWidth() / 2, point.intY() - prepared.getHeight() / 2, null); destination.getGraphics().drawImage(prepared, point.intX() - prepared.getWidth() / 2, point.intY() - prepared.getHeight() / 2, null);
} }
@Override
public BufferedImage getPreview() {
return prepared;
}
} }