On Mon, 29 Mar 2021 07:36:35 GMT, Sergey Bylokhov <s...@openjdk.org> wrote:
> The lcms 2.8 version added support for the cmsFLAGS_COPY_ALPHA flag: > https://sourceforge.net/p/lcms/mailman/lcms-user/thread/001c01d1c0f3%2484a7cb30%248df76190%24%40ProDigitalSoftware.com/#msg35143398 > > which supports alpha channel transportation > > For our usage, it means we can use TYPE_4BYTE_ABGR and TYPE_INT_ARGB directly > as a source and destination. > > Some numbers: > converting new BufferedImage(3000, 3000, TYPE_INT_ARGB) from CS_sRGB to > CS_CIEXYZ via op.filter(src, dst). > //before the fix > //Benchmark Mode Cnt Score Error Units > //ColorAlphaConv.testFilter avgt 5 603,392 ± 12,932 ms/op > > //after the fix > //Benchmark Mode Cnt Score Error Units > //ColorAlphaConv.testFilter avgt 5 121,624 ± 0,906 ms/op > > But still slower than kcms > //kcms jdk8u60 > //Benchmark Mode Cnt Score Error Units > //ColorAlphaConv.testFilter avgt 5 13,256 ± 0,169 ms/op This pull request has now been integrated. Changeset: 16acfafb Author: Sergey Bylokhov <s...@openjdk.org> URL: https://git.openjdk.java.net/jdk/commit/16acfafb Stats: 208 lines in 5 files changed: 195 ins; 2 del; 11 mod 8012229: [lcms] Improve performance of color conversion for images with alpha channel Reviewed-by: azvegint ------------- PR: https://git.openjdk.java.net/jdk/pull/3239
