How would clear a BufferedImage? - 未名空间MITBBS历史存档

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How would clear a BufferedImage?

How would clear a BufferedImage?# Java - 爪哇娇娃

g*g2005-09-28 07:09

1 楼

If I want to reset a BufferedImage to a transparent empty image,
(so that I can change the content of image to paint)
I am doing a new BufferedImage(BufferedImage.INT_ARGB) now,
anyway I can fill the raster instead?
I am worried if this frequent memory allocation would be a big
burden for GC and degrade performance.

m*t2005-09-28 07:09

2 楼

Isn't this faster than actually painting it anyway?
I wouldn't worry about it. Speaking of object allocation and GC,
there is an ongoing thread on TSS that might be some good read:
http://www.theserverside.com/news/thread.tss?thread_id=36832

【在 g*****g 的大作中提到】

: If I want to reset a BufferedImage to a transparent empty image,
: (so that I can change the content of image to paint)
: I am doing a new BufferedImage(BufferedImage.INT_ARGB) now,
: anyway I can fill the raster instead?
: I am worried if this frequent memory allocation would be a big
: burden for GC and degrade performance.

c*t2005-09-28 07:09

3 楼

in addition to what magicfat said, you can do direct DataBufferInt
manipulation to set all values to zeros. Of course, new a BufferedImage
is faster in every way you look at :P

【在 g*****g 的大作中提到】