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Fix #1850 (JmeSystem.writeImageFile() throw java.nio.BufferUnderflowE… #1851

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Sep 20, 2022
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Fix #1850 (JmeSystem.writeImageFile() throw java.nio.BufferUnderflowE… #1851

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28 changes: 22 additions & 6 deletions jme3-desktop/src/main/java/com/jme3/system/JmeDesktopSystem.java
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Original file line number Diff line number Diff line change
Expand Up @@ -40,7 +40,11 @@
import com.jme3.audio.openal.ALC;
import com.jme3.audio.openal.EFX;
import com.jme3.system.JmeContext.Type;
import com.jme3.texture.Image;
import com.jme3.texture.image.ColorSpace;
import com.jme3.util.Screenshots;
import jme3tools.converters.ImageToAwt;

import java.awt.EventQueue;
import java.awt.Graphics2D;
import java.awt.GraphicsEnvironment;
Expand Down Expand Up @@ -80,30 +84,42 @@ private static BufferedImage verticalFlip(BufferedImage original) {
AffineTransform tx = AffineTransform.getScaleInstance(1, -1);
tx.translate(0, -original.getHeight());
AffineTransformOp transformOp = new AffineTransformOp(tx, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
BufferedImage awtImage = new BufferedImage(original.getWidth(), original.getHeight(), BufferedImage.TYPE_INT_BGR);
BufferedImage awtImage = new BufferedImage(original.getWidth(), original.getHeight(), original.getType());
Graphics2D g2d = awtImage.createGraphics();
g2d.setRenderingHint(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_SPEED);
g2d.drawImage(original, transformOp, 0, 0);
g2d.dispose();
return awtImage;
}


private static BufferedImage ensureOpaque(BufferedImage original) {
if (original.getTransparency() == BufferedImage.OPAQUE)
return original;
int w = original.getWidth();
int h = original.getHeight();
int[] pixels = new int[w * h];
original.getRGB(0, 0, w, h, pixels, 0, w);
BufferedImage opaqueImage = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
opaqueImage.setRGB(0, 0, w, h, pixels, 0, w);
return opaqueImage;
}

@Override
public void writeImageFile(OutputStream outStream, String format, ByteBuffer imageData, int width, int height) throws IOException {
BufferedImage awtImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_BGR);
Screenshots.convertScreenShot2(imageData.asIntBuffer(), awtImage);
BufferedImage awtImage = ImageToAwt.convert(new Image(Image.Format.RGBA8, width, height, imageData, ColorSpace.Linear), false, true, 0);
awtImage = verticalFlip(awtImage);

ImageWriter writer = ImageIO.getImageWritersByFormatName(format).next();
ImageWriteParam writeParam = writer.getDefaultWriteParam();

if (format.equals("jpg")) {
awtImage = ensureOpaque(awtImage);

JPEGImageWriteParam jpegParam = (JPEGImageWriteParam) writeParam;
jpegParam.setCompressionMode(ImageWriteParam.MODE_EXPLICIT);
jpegParam.setCompressionQuality(0.95f);
}

awtImage = verticalFlip(awtImage);

ImageOutputStream imgOut = new MemoryCacheImageOutputStream(outStream);
writer.setOutput(imgOut);
Expand Down