[英]Is there a way to set a default color for transparency when using ColorConvertOp in Java2D?
I'm converting an image with transparency in it into a Colorspace that doesn't have transparency. 我正在将其中具有透明性的图像转换为不具有透明性的Colorspace。 I'd like to set a background color for the transparent areas.
我想为透明区域设置背景颜色。 Right now when I convert it any area that is transparent turns to black in the final image.
现在,当我将其转换时,任何透明区域都会在最终图像中变为黑色。 Is there a way to do that while I'm converting between ColorSpaces?
在ColorSpaces之间进行转换时,有没有办法做到这一点? Here is my code I use to convert between color spaces:
这是我用来在色彩空间之间转换的代码:
public BufferedImage convertColorspace( BufferedImage source, int newType) {
BufferedImage destination = new BufferedImage( source.getWidth(), source.getHeight(), newType);
ColorConvertOp colorConvertOp = new ColorConvertOp(null);
colorConvertOp.filter(source, destination);
return destination;
}
// here is how its used
BufferedImage converted = convertColorspace(combinedImage, BufferedImage.TYPE_3BYTE_BGR);
I'm converting from BufferedImage.TYPE_4BYTE_ARGB to BufferedImage.TYPE_3BYTE_BGR. 我正在从BufferedImage.TYPE_4BYTE_ARGB转换为BufferedImage.TYPE_3BYTE_BGR。
How about: 怎么样:
BufferedImage temp = new BufferedImage(source.getWidth(), source.getHeight(),
BufferedImage.TYPE_INT_ARGB);
Graphics2D g2 = temp.createGraphics();
g2.setColor(Color.green);
g2.fillRect(0, 0, source.getWidth(), source.getHeight());
g2.drawImage(0, 0, source, null);
g2.dispose();
Then call colorConvertOp.filter
with temp
instead of source
. 然后使用
temp
而不是source
调用colorConvertOp.filter
。
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