From 3ea01f72f20d4f58bf0dcd420fa5c2724b67ac8d Mon Sep 17 00:00:00 2001 From: Matt Sarett Date: Wed, 8 Mar 2017 09:53:41 -0500 Subject: [PATCH] Optimize mipmap downsample_2_2 in sRGB mode Desktop (HP z620) Before: mipmap_build_2048x2048_0_gamma 10.5 ms mipmap_build_2048x2048_1_gamma 77.1 ms After: mipmap_build_2048x2048_0_gamma 10.5 ms mipmap_build_2048x2048_1_gamma 25.1 ms Pixel XL Before: mipmap_build_2048x2048_0_gamma 160 ms mipmap_build_2048x2048_1_gamma 1.5 s After: mipmap_build_2048x2048_0_gamma 160 ms mipmap_build_2048x2048_1_gamma 313 ms Also provides marginal performance improvements for other sRGB downsamples. BUG=skia: Change-Id: Icfcd2ccd69676ccf3822db8042a4698e4464bb71 Reviewed-on: https://skia-review.googlesource.com/9386 Commit-Queue: Matt Sarett Reviewed-by: Mike Klein --- bench/MipMapBench.cpp | 3 + src/core/SkMipMap.cpp | 88 +++++++++++++++++- src/core/SkSRGB.cpp | 249 ++++++++++++++++++++++++++++++++++++++++++++++++++ src/core/SkSRGB.h | 4 +- 4 files changed, 338 insertions(+), 6 deletions(-) diff --git a/bench/MipMapBench.cpp b/bench/MipMapBench.cpp index bffae42..1ffd624 100644 --- a/bench/MipMapBench.cpp +++ b/bench/MipMapBench.cpp @@ -65,3 +65,6 @@ DEF_BENCH( return new MipMapBench(511, 511, SkDestinationSurfaceColorMode::kGammaAndColorSpaceAware); ) DEF_BENCH( return new MipMapBench(512, 512, SkDestinationSurfaceColorMode::kLegacy, true); ) DEF_BENCH( return new MipMapBench(511, 511, SkDestinationSurfaceColorMode::kLegacy, true); ) +DEF_BENCH( return new MipMapBench(2048, 2048, SkDestinationSurfaceColorMode::kLegacy); ) +DEF_BENCH( return new MipMapBench(2048, 2048, + SkDestinationSurfaceColorMode::kGammaAndColorSpaceAware); ) diff --git a/src/core/SkMipMap.cpp b/src/core/SkMipMap.cpp index 987949f..066f3e2 100644 --- a/src/core/SkMipMap.cpp +++ b/src/core/SkMipMap.cpp @@ -12,6 +12,7 @@ #include "SkMathPriv.h" #include "SkNx.h" #include "SkPM4fPriv.h" +#include "SkSRGB.h" #include "SkTypes.h" // @@ -35,11 +36,17 @@ struct ColorTypeFilter_8888 { struct ColorTypeFilter_S32 { typedef uint32_t Type; - static Sk4f Expand(uint32_t x) { - return Sk4f_fromS32(x); + static Sk4h Expand(uint32_t x) { + return Sk4h(sk_linear12_from_srgb[(x ) & 0xFF], + sk_linear12_from_srgb[(x >> 8) & 0xFF], + sk_linear12_from_srgb[(x >> 16) & 0xFF], + (x >> 24) << 4); } - static uint32_t Compact(const Sk4f& x) { - return Sk4f_toS32(x); + static uint32_t Compact(const Sk4h& x) { + return sk_linear12_to_srgb[x[0]] | + sk_linear12_to_srgb[x[1]] << 8 | + sk_linear12_to_srgb[x[2]] << 16 | + (x[3] >> 4) << 24; } }; @@ -286,6 +293,77 @@ template void downsample_3_3(void* dst, const void* src, size_t src /////////////////////////////////////////////////////////////////////////////////////////////////// +// Some sRGB specific performance optimizations. + +void downsample_2_2_srgb(void* dst, const void* src, size_t srcRB, int count) { + const uint8_t* p0 = ((const uint8_t*) src); + const uint8_t* p1 = ((const uint8_t*) src) + srcRB; + uint8_t* d = (uint8_t*) dst; + + // Given pixels: + // a0 b0 c0 d0 ... + // a1 b1 c1 d1 ... + // We want: + // (a0 + b0 + a1 + b1) / 4 + // (c0 + d0 + c1 + d1) / 4 + // ... + while (count >= 4) { + Sk8h a0c0 = Sk8h(sk_linear12_from_srgb[p0[ 0]], + sk_linear12_from_srgb[p0[ 1]], + sk_linear12_from_srgb[p0[ 2]], + p0[ 3] << 4 , + sk_linear12_from_srgb[p0[ 8]], + sk_linear12_from_srgb[p0[ 9]], + sk_linear12_from_srgb[p0[10]], + p0[11] << 4 ); + Sk8h b0d0 = Sk8h(sk_linear12_from_srgb[p0[ 4]], + sk_linear12_from_srgb[p0[ 5]], + sk_linear12_from_srgb[p0[ 6]], + p0[ 7] << 4 , + sk_linear12_from_srgb[p0[12]], + sk_linear12_from_srgb[p0[13]], + sk_linear12_from_srgb[p0[14]], + p0[15] << 4 ); + Sk8h a1c1 = Sk8h(sk_linear12_from_srgb[p1[ 0]], + sk_linear12_from_srgb[p1[ 1]], + sk_linear12_from_srgb[p1[ 2]], + p1[ 3] << 4 , + sk_linear12_from_srgb[p1[ 8]], + sk_linear12_from_srgb[p1[ 9]], + sk_linear12_from_srgb[p1[10]], + p1[11] << 4 ); + Sk8h b1d1 = Sk8h(sk_linear12_from_srgb[p1[ 4]], + sk_linear12_from_srgb[p1[ 5]], + sk_linear12_from_srgb[p1[ 6]], + p1[ 7] << 4 , + sk_linear12_from_srgb[p1[12]], + sk_linear12_from_srgb[p1[13]], + sk_linear12_from_srgb[p1[14]], + p1[15] << 4 ); + + Sk8h avg = (a0c0 + b0d0 + a1c1 + b1d1) >> 2; + d[0] = sk_linear12_to_srgb[avg[0]]; + d[1] = sk_linear12_to_srgb[avg[1]]; + d[2] = sk_linear12_to_srgb[avg[2]]; + d[3] = avg[3] >> 4; + d[4] = sk_linear12_to_srgb[avg[4]]; + d[5] = sk_linear12_to_srgb[avg[5]]; + d[6] = sk_linear12_to_srgb[avg[6]]; + d[7] = avg[7] >> 4; + + p0 += 16; + p1 += 16; + d += 8; + count -= 4; + } + + if (count) { + downsample_2_2(d, p0, srcRB, count); + } +} + +/////////////////////////////////////////////////////////////////////////////////////////////////// + size_t SkMipMap::AllocLevelsSize(int levelCount, size_t pixelSize) { if (levelCount < 0) { return 0; @@ -322,7 +400,7 @@ SkMipMap* SkMipMap::Build(const SkPixmap& src, SkDestinationSurfaceColorMode col proc_1_2 = downsample_1_2; proc_1_3 = downsample_1_3; proc_2_1 = downsample_2_1; - proc_2_2 = downsample_2_2; + proc_2_2 = downsample_2_2_srgb; proc_2_3 = downsample_2_3; proc_3_1 = downsample_3_1; proc_3_2 = downsample_3_2; diff --git a/src/core/SkSRGB.cpp b/src/core/SkSRGB.cpp index 57d2ae0..327c7d8 100644 --- a/src/core/SkSRGB.cpp +++ b/src/core/SkSRGB.cpp @@ -73,3 +73,252 @@ const float sk_linear_from_srgb[256] = { 0.938685728457888000f, 0.947306536733200000f, 0.955973353249286000f, 0.964686247894465000f, 0.973445290398413000f, 0.982250550333117000f, 0.991102097113830000f, 1.000000000000000000f, }; + +/* + * Converts sRGB encoded bytes to a 12-bit linear representation. + */ +const uint16_t sk_linear12_from_srgb[256] = { + 0, 1, 2, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15, 16, 18, 20, 21, 23, 25, 27, 29, 31, 33, 35, 37, + 40, 42, 45, 48, 50, 53, 56, 59, 62, 66, 69, 72, 76, 79, 83, 87, 91, 95, 99, 103, 107, 112, + 116, 121, 126, 131, 136, 141, 146, 151, 156, 162, 168, 173, 179, 185, 191, 197, 204, 210, + 216, 223, 230, 237, 244, 251, 258, 265, 273, 280, 288, 296, 304, 312, 320, 329, 337, 346, + 354, 363, 372, 381, 390, 400, 409, 419, 428, 438, 448, 458, 469, 479, 490, 500, 511, 522, + 533, 544, 555, 567, 578, 590, 602, 614, 626, 639, 651, 664, 676, 689, 702, 715, 728, 742, + 755, 769, 783, 797, 811, 825, 840, 854, 869, 884, 899, 914, 929, 945, 960, 976, 992, 1008, + 1024, 1041, 1057, 1074, 1091, 1108, 1125, 1142, 1159, 1177, 1195, 1213, 1231, 1249, 1267, + 1286, 1304, 1323, 1342, 1361, 1381, 1400, 1420, 1440, 1459, 1480, 1500, 1520, 1541, 1562, + 1582, 1603, 1625, 1646, 1668, 1689, 1711, 1733, 1755, 1778, 1800, 1823, 1846, 1869, 1892, + 1916, 1939, 1963, 1987, 2011, 2035, 2059, 2084, 2109, 2133, 2159, 2184, 2209, 2235, 2260, + 2286, 2312, 2339, 2365, 2392, 2419, 2446, 2473, 2500, 2527, 2555, 2583, 2611, 2639, 2668, + 2696, 2725, 2754, 2783, 2812, 2841, 2871, 2901, 2931, 2961, 2991, 3022, 3052, 3083, 3114, + 3146, 3177, 3209, 3240, 3272, 3304, 3337, 3369, 3402, 3435, 3468, 3501, 3535, 3568, 3602, + 3636, 3670, 3705, 3739, 3774, 3809, 3844, 3879, 3915, 3950, 3986, 4022, 4059, 4095, +}; + +/* + * Converts 12-bit linear to sRGB encoded bytes. + */ +const uint8_t sk_linear12_to_srgb[4096] = { + 0, 1, 2, 2, 3, 4, 5, 6, 6, 7, 8, 9, 10, 10, 11, 12, 13, 13, 14, 15, 15, 16, 16, 17, 18, 18, + 19, 19, 20, 20, 21, 21, 22, 22, 23, 23, 23, 24, 24, 25, 25, 25, 26, 26, 27, 27, 27, 28, 28, + 29, 29, 29, 30, 30, 30, 31, 31, 31, 32, 32, 32, 33, 33, 33, 34, 34, 34, 34, 35, 35, 35, 36, + 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 39, 39, 39, 40, 40, 40, 40, 41, 41, 41, 41, 42, 42, + 42, 42, 43, 43, 43, 43, 43, 44, 44, 44, 44, 45, 45, 45, 45, 46, 46, 46, 46, 46, 47, 47, 47, + 47, 48, 48, 48, 48, 48, 49, 49, 49, 49, 49, 50, 50, 50, 50, 50, 51, 51, 51, 51, 51, 52, 52, + 52, 52, 52, 53, 53, 53, 53, 53, 54, 54, 54, 54, 54, 55, 55, 55, 55, 55, 55, 56, 56, 56, 56, + 56, 57, 57, 57, 57, 57, 57, 58, 58, 58, 58, 58, 58, 59, 59, 59, 59, 59, 59, 60, 60, 60, 60, + 60, 60, 61, 61, 61, 61, 61, 61, 62, 62, 62, 62, 62, 62, 63, 63, 63, 63, 63, 63, 64, 64, 64, + 64, 64, 64, 64, 65, 65, 65, 65, 65, 65, 66, 66, 66, 66, 66, 66, 66, 67, 67, 67, 67, 67, 67, + 67, 68, 68, 68, 68, 68, 68, 68, 69, 69, 69, 69, 69, 69, 69, 70, 70, 70, 70, 70, 70, 70, 71, + 71, 71, 71, 71, 71, 71, 72, 72, 72, 72, 72, 72, 72, 72, 73, 73, 73, 73, 73, 73, 73, 74, 74, + 74, 74, 74, 74, 74, 74, 75, 75, 75, 75, 75, 75, 75, 75, 76, 76, 76, 76, 76, 76, 76, 77, 77, + 77, 77, 77, 77, 77, 77, 78, 78, 78, 78, 78, 78, 78, 78, 78, 79, 79, 79, 79, 79, 79, 79, 79, + 80, 80, 80, 80, 80, 80, 80, 80, 81, 81, 81, 81, 81, 81, 81, 81, 81, 82, 82, 82, 82, 82, 82, + 82, 82, 83, 83, 83, 83, 83, 83, 83, 83, 83, 84, 84, 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a/src/core/SkSRGB.h b/src/core/SkSRGB.h index 88f2cd7..83ae5a4 100644 --- a/src/core/SkSRGB.h +++ b/src/core/SkSRGB.h @@ -20,7 +20,9 @@ * sk_linear_to_srgb() will run a little faster than usual when compiled with SSE4.1+. */ -extern const float sk_linear_from_srgb[256]; +extern const float sk_linear_from_srgb[256]; +extern const uint16_t sk_linear12_from_srgb[256]; +extern const uint8_t sk_linear12_to_srgb[4096]; template static inline V sk_clamp_0_255(const V& x) { -- 2.7.4