Hi Sergey,
According to your previous comments:
- VolatileImage.validate(GraphicsConfiguration) does not return
IMAGE_INCOMPATIBLE for a graphics configuration which default transform
was changed.
This is because the BufImgVolatileSurfaceManager has acceleration
disabled and it skips check to the valid graphics configuration.
I have filled an issue on it: JDK-8165212 VolatileImage is compatible
with GraphicsConfiguration which transform is changed
- JViewport.backingStoreImage field is protected so it is not possible
to change its type. Moreover, it is not clear can a someone override
JViewport and use backingStoreImage as a buffered image so he does not
expect that the image content can be lost.
Could we just file a new issue that the backing store image can be
changed to VolatileImage in JViewport and return to discussion where
graphics scale changing is checked:
http://cr.openjdk.java.net/~alexsch/8164032/webrev.02
Thanks,
Alexandr.
On 8/30/2016 3:54 PM, Alexandr Scherbatiy wrote:
Hello,
Could you review the updated fix:
http://cr.openjdk.java.net/~alexsch/8164032/webrev.04/
The Component.createVolatileImage() is used to create a backing store
volatile image.
On 8/29/2016 4:18 PM, Sergey Bylokhov wrote:
On 19.08.16 10:15, Alexandr Scherbatiy wrote:
On 8/18/2016 3:05 PM, Alexandr Scherbatiy wrote:
Hello,
Could you review the updated fix:
http://cr.openjdk.java.net/~alexsch/8164032/webrev.02
The backing store image is recreated for the case where scaled sizes
are changed.
A version where a VolatileImage is used as a backing store image:
http://cr.openjdk.java.net/~alexsch/8164032/webrev.03/
The VI case looks simpler. I guess it can be simplified even more:
Peobably this code is unnecessary?
} else if (vImg instanceof SunVolatileImage) {
753 SunVolatileImage svImg = (SunVolatileImage)
vImg;
754 if
(!graphicsConfig.equals(svImg.getGraphicsConfig())) {
755 backingStoreImage = null;
756 }
757 }
My understanding is that if VI.validate!=IMAGE_INCOMPATIBLE then we
can use it for drawing even if the GC is different?
Different graphics configurations can have different default
transforms. The backing store image should be recreated in this case.
Thanks,
Alexandr.
Probably we can reuse Component.createVolatileImage() instead of
createImage()?
Also can you please check a performance of these two solutions?
Thanks,
Alexandr.
Thanks,
Alexandr.
On 8/17/2016 5:05 PM, Sergey Bylokhov wrote:
On 17.08.16 14:02, Alexandr Scherbatiy wrote:
Hello,
Could you review the updated fix:
http://cr.openjdk.java.net/~alexsch/8164032/webrev.01
The generic transform is used for the backing store image scaling.
As far as I understand the current fix will not work if the scale was
changed(the JViewport will use old buffer)?
It seems that the new local AbstractMultiResolutionImage contain only
one image variant inside and looks quite similar to the
VolatileImage, probably we can change this cache from BufferedImage
to VolatileImage? In this case the scale of the VI will be the same
as "g":
g.getDeviceConfiguration().createCompatibleVolatileImage()
On 8/15/2016 4:58 PM, Sergey Bylokhov wrote:
Hi, Alexandr.
I doubt that getScaleX/getScaleY can be used here because the scale
can be generic(translate+rotate+scale). How this cache will work if
transform will be changed after we save "backingStoreImage"?
On 15.08.16 16:16, Alexandr Scherbatiy wrote:
Hello,
Could you review the fix:
bug: https://bugs.openjdk.java.net/browse/JDK-8164032
webrev: http://cr.openjdk.java.net/~alexsch/8164032/webrev.00
The fix scales the JViewport backing store image when graphics
transform is not identity.
Thanks,
Alexandr.
