On Wed, 14 Oct 2020 18:35:15 GMT, Sergey Bylokhov <s...@openjdk.org> wrote:
> The XrSwToPMBlit is a blit which is used as a direct(unscaled) blit of the
> image in the memory to the pixmap. It tries
> to optimize the SrcOver composite in case of an opaque source image and use
> Src instead:
> if (CompositeType.SrcOverNoEa.equals(comp) && (src.getTransparency()
> == Transparency.OPAQUE)) {
> Blit opaqueSwToSurfaceBlit =
> Blit.getFromCache(src.getSurfaceType(), CompositeType.SrcNoEa,
> dst.getSurfaceType());
> opaqueSwToSurfaceBlit.Blit(src, dst, comp, clip, sx, sy, dx, dy,
> w, h);
> } else {
>
> The code above does not work for two reasons:
> - The check "CompositeType.SrcOverNoEa.equals(comp)" always fails because the
> comp is of type
> Composite(AlphaComposite/XORComposite/etc) not a CompositeType
> - This optimisation is applied already in the
> sun.java2d.pipe.DrawImage#blitSurfaceData:
> https://github.com/openjdk/jdk/blob/master/src/java.desktop/share/classes/sun/java2d/pipe/DrawImage.java#L933
This pull request has now been integrated.
Changeset: 89e54445
Author: Sergey Bylokhov <s...@openjdk.org>
URL: https://git.openjdk.java.net/jdk/commit/89e54445
Stats: 15 lines in 1 file changed: 0 ins; 6 del; 9 mod
8254788: Dead code in the sun.java2d.xr.XRPMBlitLoops$XrSwToPMBlit
Reviewed-by: prr
-------------
PR: https://git.openjdk.java.net/jdk/pull/665
