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match sRGB primaries with skcms

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This should prevent lots of conversions between the two
gamuts when the matrix is nearly but not quite identity.

Change-Id: Icb6ba35d763e9fbd2d7fc6343d49fe2c542ec2ec
Reviewed-on: https://skia-review.googlesource.com/148990
Commit-Queue: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: Mike Klein <mtklein@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
This commit is contained in:
Mike Klein 2018-08-23 14:02:58 -04:00 committed by Skia Commit-Bot
parent 46a1338968
commit 66567d870f
1 changed files with 8 additions and 0 deletions
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8
src/core/SkColorSpacePriv.h
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@ -15,9 +15,17 @@
#define SkColorSpacePrintf(...)
static constexpr float gSRGB_toXYZD50[] {
#ifdef SK_LEGACY_SRGB_GAMUT
0.4360747f, 0.3850649f, 0.1430804f, // Rx, Gx, Bx
0.2225045f, 0.7168786f, 0.0606169f, // Ry, Gy, By
0.0139322f, 0.0971045f, 0.7141733f, // Rz, Gz, Bz
#else
// These are taken from skcms, and there originally from 16-bit fixed point.
// For best results, please keep them exactly in sync with skcms.
0.436065674f, 0.385147095f, 0.143066406f,
0.222488403f, 0.716873169f, 0.060607910f,
0.013916016f, 0.097076416f, 0.714096069f,
#endif
};
static constexpr float gAdobeRGB_toXYZD50[] {