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lz: Optimise SAME_PIXEL for RGB16

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Do not extract all components and compare one by one, can be easily
compared together.
Performance measurements on a set of 16 bit images shown an improve of
about 10%.

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Acked-by: Christophe Fergeau <cfergeau@redhat.com>
This commit is contained in:
Frediano Ziglio 2017-12-24 13:27:25 +00:00
parent a1f6f42a33
commit 70aa6d39b6
1 changed files with 4 additions and 4 deletions
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8
common/lz_compress_tmpl.c
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@ -105,9 +105,8 @@
#ifdef LZ_RGB16
#define PIXEL rgb16_pixel_t
#define FNAME(name) lz_rgb16_##name
#define GET_r(pix) (((pix) >> 10) & 0x1f)
#define GET_g(pix) (((pix) >> 5) & 0x1f)
#define GET_b(pix) ((pix) & 0x1f)
#define GET_rgb(pix) ((pix) & 0x7fffu)
#define SAME_PIXEL(p1, p2) (GET_rgb(p1) == GET_rgb(p2))
#define ENCODE_PIXEL(e, pix) {encode(e, (pix) >> 8); encode(e, (pix) & 0xff);}
#define HASH_FUNC(v, p) { \
@ -153,7 +152,7 @@
}
#endif
#if defined(LZ_RGB16) || defined(LZ_RGB24) || defined(LZ_RGB32)
#if defined(LZ_RGB24) || defined(LZ_RGB32)
#define SAME_PIXEL(p1, p2) (GET_r(p1) == GET_r(p2) && GET_g(p1) == GET_g(p2) && \
GET_b(p1) == GET_b(p2))
@ -525,6 +524,7 @@ static void FNAME(compress)(Encoder *encoder)
#undef GET_r
#undef GET_g
#undef GET_b
#undef GET_rgb
#undef GET_CODE
#undef LZ_PLT
#undef LZ_RGB_ALPHA