granicus.if.org Git - php/commit

]> granicus.if.org Git - php/commit

author	Christoph M. Becker <cmbecker69@gmx.de>
	Sun, 25 Sep 2016 07:47:23 +0000 (09:47 +0200)
committer	Christoph M. Becker <cmbecker69@gmx.de>
	Sun, 25 Sep 2016 09:28:39 +0000 (11:28 +0200)
commit	65ee87f20dfebb4cde5f908cd6ba57384810e740
tree	01b6f421c40c261a285527dd7fc047d621090e56	tree \| snapshot
parent	47f1666f7cde616b72cf5461a57db9de3d49ddac	commit \| diff

Refactor imagegammacorrect()

We apply the law `(b**r)**s == b**(r*s)` which holds for all non-negative b
and positive r,s, so a single pow() suffices. Furthermore, we precompute the
gamma, so the refactored code is simpler and faster.

ext/gd/gd.c		diff \| blob \| history
ext/gd/tests/imagegammacorrect_variation2.phpt	[new file with mode: 0644]	blob
ext/gd/tests/imagegammacorrect_variation2_1_1.png	[new file with mode: 0644]	blob
ext/gd/tests/imagegammacorrect_variation2_1_2.png	[new file with mode: 0644]	blob
ext/gd/tests/imagegammacorrect_variation2_2_1.png	[new file with mode: 0644]	blob

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