一直试图将视图缩小到不同的规模,但我遇到了一些麻烦。上下文位于视频播放器内(使用VLCJ)。
此代码用于缩放图像,但在第一帧之后,由于某种原因,图像停止使用下一张图像进行更新。
public void newFrameRecieved(int[] rgbBuffer)
{
this.image.setRGB(0, 0, this.size.width, this.size.height, rgbBuffer, 0, this.size.width);
after = new BufferedImage(this.getWidth(), this.getHeight(), this.image.getType());
at = new AffineTransform();
scalingFactorX = (double)this.getWidth()/ (double)this.image.getWidth();
scalingFactorY = (double)this.getHeight()/ (double)this.image.getHeight();
at.scale(scalingFactorX, scalingFactorY);
scaleOp = new AffineTransformOp(at, AffineTransformOp.TYPE_BILINEAR);
this.image = scaleOp.filter(this.image, after);
repaint();
}
如果中间部分(this.image.setRGB(......)和repaint();之间的所有代码都被删除,那么它可以工作(除了缩放部分......)
非常感谢你们提供的任何帮助! 收到的错误如下:
JNA: Callback uk.co.caprica.vlcj.player.direct.DefaultDirectMediaPlayer$DisplayCallback@4516af24 threw the following exception:
java.lang.ArrayIndexOutOfBoundsException: Coordinate out of bounds!
at sun.awt.image.IntegerInterleavedRaster.setDataElements(IntegerInterleavedRaster.java:301)
at java.awt.image.BufferedImage.setRGB(BufferedImage.java:1059)
at myVlcjWrapper.VideoSurfacePanel.newFrameRecieved(VideoSurfacePanel.java:65)
我理解这个问题我对如何修复它一无所知! 谢谢!
答案 0 :(得分:0)
在做了很多错误搜索后,我最终得到了这段工作代码!
public void newFrameRecieved(int[] rgbBuffer, Dimension max)
{
before = new BufferedImage(max.width, max.height, BufferedImage.TYPE_INT_ARGB);
before.setRGB(0, 0, max.width, max.height, rgbBuffer, 0, max.width);
after = new BufferedImage(this.getWidth(), this.getHeight(), this.image.getType());
at = new AffineTransform();
scalingFactorX = (double)after.getWidth()/ (double)before.getWidth();
scalingFactorY = (double)after.getHeight()/ (double)before.getHeight();
at.scale(scalingFactorX, scalingFactorY);
scaleOp = new AffineTransformOp(at, AffineTransformOp.TYPE_BILINEAR);
this.image = scaleOp.filter(before, after);
repaint();
}
这是一个微小的变化,但它做到了!最好发布它以防万一有人再次在这里找到他们的方式。 谢谢你的帮助! :)