msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2016 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #ifndef SkColorXform_opts_DEFINED |
| 9 | #define SkColorXform_opts_DEFINED |
| 10 | |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 11 | #include "SkNx.h" |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 12 | #include "SkColorPriv.h" |
| 13 | |
| 14 | namespace SK_OPTS_NS { |
| 15 | |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 16 | extern const float linear_from_srgb[256] = { |
| 17 | 0.000000000000000000f, 0.000303526983548838f, 0.000607053967097675f, 0.000910580950646513f, |
| 18 | 0.001214107934195350f, 0.001517634917744190f, 0.001821161901293030f, 0.002124688884841860f, |
| 19 | 0.002428215868390700f, 0.002731742851939540f, 0.003034518678424960f, 0.003346535763899160f, |
| 20 | 0.003676507324047440f, 0.004024717018496310f, 0.004391442037410290f, 0.004776953480693730f, |
| 21 | 0.005181516702338390f, 0.005605391624202720f, 0.006048833022857060f, 0.006512090792594470f, |
| 22 | 0.006995410187265390f, 0.007499032043226180f, 0.008023192985384990f, 0.008568125618069310f, |
| 23 | 0.009134058702220790f, 0.009721217320237850f, 0.010329823029626900f, 0.010960094006488200f, |
| 24 | 0.011612245179743900f, 0.012286488356915900f, 0.012983032342173000f, 0.013702083047289700f, |
| 25 | 0.014443843596092500f, 0.015208514422912700f, 0.015996293365509600f, 0.016807375752887400f, |
| 26 | 0.017641954488384100f, 0.018500220128379700f, 0.019382360956935700f, 0.020288563056652400f, |
| 27 | 0.021219010376003600f, 0.022173884793387400f, 0.023153366178110400f, 0.024157632448504800f, |
| 28 | 0.025186859627361600f, 0.026241221894849900f, 0.027320891639074900f, 0.028426039504420800f, |
| 29 | 0.029556834437808800f, 0.030713443732993600f, 0.031896033073011500f, 0.033104766570885100f, |
| 30 | 0.034339806808682200f, 0.035601314875020300f, 0.036889450401100000f, 0.038204371595346500f, |
| 31 | 0.039546235276732800f, 0.040915196906853200f, 0.042311410620809700f, 0.043735029256973500f, |
| 32 | 0.045186204385675500f, 0.046665086336880100f, 0.048171824226889400f, 0.049706565984127200f, |
| 33 | 0.051269458374043200f, 0.052860647023180200f, 0.054480276442442400f, 0.056128490049600100f, |
| 34 | 0.057805430191067200f, 0.059511238162981200f, 0.061246054231617600f, 0.063010017653167700f, |
| 35 | 0.064803266692905800f, 0.066625938643772900f, 0.068478169844400200f, 0.070360095696595900f, |
| 36 | 0.072271850682317500f, 0.074213568380149600f, 0.076185381481307900f, 0.078187421805186300f, |
| 37 | 0.080219820314468300f, 0.082282707129814800f, 0.084376211544148800f, 0.086500462036549800f, |
| 38 | 0.088655586285772900f, 0.090841711183407700f, 0.093058962846687500f, 0.095307466630964700f, |
| 39 | 0.097587347141862500f, 0.099898728247113900f, 0.102241733088101000f, 0.104616484091104000f, |
| 40 | 0.107023102978268000f, 0.109461710778299000f, 0.111932427836906000f, 0.114435373826974000f, |
| 41 | 0.116970667758511000f, 0.119538427988346000f, 0.122138772229602000f, 0.124771817560950000f, |
| 42 | 0.127437680435647000f, 0.130136476690364000f, 0.132868321553818000f, 0.135633329655206000f, |
| 43 | 0.138431615032452000f, 0.141263291140272000f, 0.144128470858058000f, 0.147027266497595000f, |
| 44 | 0.149959789810609000f, 0.152926151996150000f, 0.155926463707827000f, 0.158960835060880000f, |
| 45 | 0.162029375639111000f, 0.165132194501668000f, 0.168269400189691000f, 0.171441100732823000f, |
| 46 | 0.174647403655585000f, 0.177888415983629000f, 0.181164244249860000f, 0.184474994500441000f, |
| 47 | 0.187820772300678000f, 0.191201682740791000f, 0.194617830441576000f, 0.198069319559949000f, |
| 48 | 0.201556253794397000f, 0.205078736390317000f, 0.208636870145256000f, 0.212230757414055000f, |
| 49 | 0.215860500113899000f, 0.219526199729269000f, 0.223227957316809000f, 0.226965873510098000f, |
| 50 | 0.230740048524349000f, 0.234550582161005000f, 0.238397573812271000f, 0.242281122465555000f, |
| 51 | 0.246201326707835000f, 0.250158284729953000f, 0.254152094330827000f, 0.258182852921596000f, |
| 52 | 0.262250657529696000f, 0.266355604802862000f, 0.270497791013066000f, 0.274677312060385000f, |
| 53 | 0.278894263476810000f, 0.283148740429992000f, 0.287440837726918000f, 0.291770649817536000f, |
| 54 | 0.296138270798321000f, 0.300543794415777000f, 0.304987314069886000f, 0.309468922817509000f, |
| 55 | 0.313988713375718000f, 0.318546778125092000f, 0.323143209112951000f, 0.327778098056542000f, |
| 56 | 0.332451536346179000f, 0.337163615048330000f, 0.341914424908661000f, 0.346704056355030000f, |
| 57 | 0.351532599500439000f, 0.356400144145944000f, 0.361306779783510000f, 0.366252595598840000f, |
| 58 | 0.371237680474149000f, 0.376262122990906000f, 0.381326011432530000f, 0.386429433787049000f, |
| 59 | 0.391572477749723000f, 0.396755230725627000f, 0.401977779832196000f, 0.407240211901737000f, |
| 60 | 0.412542613483904000f, 0.417885070848138000f, 0.423267669986072000f, 0.428690496613907000f, |
| 61 | 0.434153636174749000f, 0.439657173840919000f, 0.445201194516228000f, 0.450785782838223000f, |
| 62 | 0.456411023180405000f, 0.462076999654407000f, 0.467783796112159000f, 0.473531496148010000f, |
| 63 | 0.479320183100827000f, 0.485149940056070000f, 0.491020849847836000f, 0.496932995060870000f, |
| 64 | 0.502886458032569000f, 0.508881320854934000f, 0.514917665376521000f, 0.520995573204354000f, |
| 65 | 0.527115125705813000f, 0.533276404010505000f, 0.539479489012107000f, 0.545724461370187000f, |
| 66 | 0.552011401512000000f, 0.558340389634268000f, 0.564711505704929000f, 0.571124829464873000f, |
| 67 | 0.577580440429651000f, 0.584078417891164000f, 0.590618840919337000f, 0.597201788363763000f, |
| 68 | 0.603827338855338000f, 0.610495570807865000f, 0.617206562419651000f, 0.623960391675076000f, |
| 69 | 0.630757136346147000f, 0.637596873994033000f, 0.644479681970582000f, 0.651405637419824000f, |
| 70 | 0.658374817279448000f, 0.665387298282272000f, 0.672443156957688000f, 0.679542469633094000f, |
| 71 | 0.686685312435314000f, 0.693871761291990000f, 0.701101891932973000f, 0.708375779891687000f, |
| 72 | 0.715693500506481000f, 0.723055128921969000f, 0.730460740090354000f, 0.737910408772731000f, |
| 73 | 0.745404209540387000f, 0.752942216776078000f, 0.760524504675292000f, 0.768151147247507000f, |
| 74 | 0.775822218317423000f, 0.783537791526194000f, 0.791297940332630000f, 0.799102738014409000f, |
| 75 | 0.806952257669252000f, 0.814846572216101000f, 0.822785754396284000f, 0.830769876774655000f, |
| 76 | 0.838799011740740000f, 0.846873231509858000f, 0.854992608124234000f, 0.863157213454102000f, |
| 77 | 0.871367119198797000f, 0.879622396887832000f, 0.887923117881966000f, 0.896269353374266000f, |
| 78 | 0.904661174391149000f, 0.913098651793419000f, 0.921581856277295000f, 0.930110858375424000f, |
| 79 | 0.938685728457888000f, 0.947306536733200000f, 0.955973353249286000f, 0.964686247894465000f, |
| 80 | 0.973445290398413000f, 0.982250550333117000f, 0.991102097113830000f, 1.000000000000000000f, |
| 81 | }; |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 82 | |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 83 | extern const float linear_from_2dot2[256] = { |
| 84 | 0.000000000000000000f, 0.000005077051900662f, 0.000023328004666099f, 0.000056921765712193f, |
| 85 | 0.000107187362341244f, 0.000175123977503027f, 0.000261543754548491f, 0.000367136269815943f, |
| 86 | 0.000492503787191433f, 0.000638182842167022f, 0.000804658499513058f, 0.000992374304074325f, |
| 87 | 0.001201739522438400f, 0.001433134589671860f, 0.001686915316789280f, 0.001963416213396470f, |
| 88 | 0.002262953160706430f, 0.002585825596234170f, 0.002932318323938360f, 0.003302703032003640f, |
| 89 | 0.003697239578900130f, 0.004116177093282750f, 0.004559754922526020f, 0.005028203456855540f, |
| 90 | 0.005521744850239660f, 0.006040593654849810f, 0.006584957382581690f, 0.007155037004573030f, |
| 91 | 0.007751027397660610f, 0.008373117745148580f, 0.009021491898012130f, 0.009696328701658230f, |
| 92 | 0.010397802292555300f, 0.011126082368383200f, 0.011881334434813700f, 0.012663720031582100f, |
| 93 | 0.013473396940142600f, 0.014310519374884100f, 0.015175238159625200f, 0.016067700890886900f, |
| 94 | 0.016988052089250000f, 0.017936433339950200f, 0.018912983423721500f, 0.019917838438785700f, |
| 95 | 0.020951131914781100f, 0.022012994919336500f, 0.023103556157921400f, 0.024222942067534200f, |
| 96 | 0.025371276904734600f, 0.026548682828472900f, 0.027755279978126000f, 0.028991186547107800f, |
| 97 | 0.030256518852388700f, 0.031551391400226400f, 0.032875916948383800f, 0.034230206565082000f, |
| 98 | 0.035614369684918800f, 0.037028514161960200f, 0.038472746320194600f, 0.039947171001525600f, |
| 99 | 0.041451891611462500f, 0.042987010162657100f, 0.044552627316421400f, 0.046148842422351000f, |
| 100 | 0.047775753556170600f, 0.049433457555908000f, 0.051122050056493400f, 0.052841625522879000f, |
| 101 | 0.054592277281760300f, 0.056374097551979800f, 0.058187177473685400f, 0.060031607136313200f, |
| 102 | 0.061907475605455800f, 0.063814870948677200f, 0.065753880260330100f, 0.067724589685424300f, |
| 103 | 0.069727084442598800f, 0.071761448846239100f, 0.073827766327784600f, 0.075926119456264800f, |
| 104 | 0.078056589958101900f, 0.080219258736215100f, 0.082414205888459200f, 0.084641510725429500f, |
| 105 | 0.086901251787660300f, 0.089193506862247800f, 0.091518352998919500f, 0.093875866525577800f, |
| 106 | 0.096266123063339700f, 0.098689197541094500f, 0.101145164209600000f, 0.103634096655137000f, |
| 107 | 0.106156067812744000f, 0.108711149979039000f, 0.111299414824660000f, 0.113920933406333000f, |
| 108 | 0.116575776178572000f, 0.119264013005047000f, 0.121985713169619000f, 0.124740945387051000f, |
| 109 | 0.127529777813422000f, 0.130352278056244000f, 0.133208513184300000f, 0.136098549737202000f, |
| 110 | 0.139022453734703000f, 0.141980290685736000f, 0.144972125597231000f, 0.147998022982685000f, |
| 111 | 0.151058046870511000f, 0.154152260812165000f, 0.157280727890073000f, 0.160443510725344000f, |
| 112 | 0.163640671485290000f, 0.166872271890766000f, 0.170138373223312000f, 0.173439036332135000f, |
| 113 | 0.176774321640903000f, 0.180144289154390000f, 0.183548998464951000f, 0.186988508758844000f, |
| 114 | 0.190462878822409000f, 0.193972167048093000f, 0.197516431440340000f, 0.201095729621346000f, |
| 115 | 0.204710118836677000f, 0.208359655960767000f, 0.212044397502288000f, 0.215764399609395000f, |
| 116 | 0.219519718074868000f, 0.223310408341127000f, 0.227136525505149000f, 0.230998124323267000f, |
| 117 | 0.234895259215880000f, 0.238827984272048000f, 0.242796353254002000f, 0.246800419601550000f, |
| 118 | 0.250840236436400000f, 0.254915856566385000f, 0.259027332489606000f, 0.263174716398492000f, |
| 119 | 0.267358060183772000f, 0.271577415438375000f, 0.275832833461245000f, 0.280124365261085000f, |
| 120 | 0.284452061560024000f, 0.288815972797219000f, 0.293216149132375000f, 0.297652640449211000f, |
| 121 | 0.302125496358853000f, 0.306634766203158000f, 0.311180499057984000f, 0.315762743736397000f, |
| 122 | 0.320381548791810000f, 0.325036962521076000f, 0.329729032967515000f, 0.334457807923889000f, |
| 123 | 0.339223334935327000f, 0.344025661302187000f, 0.348864834082879000f, 0.353740900096629000f, |
| 124 | 0.358653905926199000f, 0.363603897920553000f, 0.368590922197487000f, 0.373615024646202000f, |
| 125 | 0.378676250929840000f, 0.383774646487975000f, 0.388910256539059000f, 0.394083126082829000f, |
| 126 | 0.399293299902674000f, 0.404540822567962000f, 0.409825738436323000f, 0.415148091655907000f, |
| 127 | 0.420507926167587000f, 0.425905285707146000f, 0.431340213807410000f, 0.436812753800359000f, |
| 128 | 0.442322948819202000f, 0.447870841800410000f, 0.453456475485731000f, 0.459079892424160000f, |
| 129 | 0.464741134973889000f, 0.470440245304218000f, 0.476177265397440000f, 0.481952237050698000f, |
| 130 | 0.487765201877811000f, 0.493616201311074000f, 0.499505276603030000f, 0.505432468828216000f, |
| 131 | 0.511397818884880000f, 0.517401367496673000f, 0.523443155214325000f, 0.529523222417277000f, |
| 132 | 0.535641609315311000f, 0.541798355950137000f, 0.547993502196972000f, 0.554227087766085000f, |
| 133 | 0.560499152204328000f, 0.566809734896638000f, 0.573158875067523000f, 0.579546611782525000f, |
| 134 | 0.585972983949661000f, 0.592438030320847000f, 0.598941789493296000f, 0.605484299910907000f, |
| 135 | 0.612065599865624000f, 0.618685727498780000f, 0.625344720802427000f, 0.632042617620641000f, |
| 136 | 0.638779455650817000f, 0.645555272444935000f, 0.652370105410821000f, 0.659223991813387000f, |
| 137 | 0.666116968775851000f, 0.673049073280942000f, 0.680020342172095000f, 0.687030812154625000f, |
| 138 | 0.694080519796882000f, 0.701169501531402000f, 0.708297793656032000f, 0.715465432335048000f, |
| 139 | 0.722672453600255000f, 0.729918893352071000f, 0.737204787360605000f, 0.744530171266715000f, |
| 140 | 0.751895080583051000f, 0.759299550695091000f, 0.766743616862161000f, 0.774227314218442000f, |
| 141 | 0.781750677773962000f, 0.789313742415586000f, 0.796916542907978000f, 0.804559113894567000f, |
| 142 | 0.812241489898490000f, 0.819963705323528000f, 0.827725794455034000f, 0.835527791460841000f, |
| 143 | 0.843369730392169000f, 0.851251645184515000f, 0.859173569658532000f, 0.867135537520905000f, |
| 144 | 0.875137582365205000f, 0.883179737672745000f, 0.891262036813419000f, 0.899384513046529000f, |
| 145 | 0.907547199521614000f, 0.915750129279253000f, 0.923993335251873000f, 0.932276850264543000f, |
| 146 | 0.940600707035753000f, 0.948964938178195000f, 0.957369576199527000f, 0.965814653503130000f, |
| 147 | 0.974300202388861000f, 0.982826255053791000f, 0.991392843592940000f, 1.000000000000000000f, |
| 148 | }; |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 149 | |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 150 | static Sk4f linear_to_2dot2(const Sk4f& x) { |
| 151 | // x^(29/64) is a very good approximation of the true value, x^(1/2.2). |
| 152 | auto x2 = x.rsqrt(), // x^(-1/2) |
| 153 | x32 = x2.rsqrt().rsqrt().rsqrt().rsqrt(), // x^(-1/32) |
| 154 | x64 = x32.rsqrt(); // x^(+1/64) |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 155 | |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 156 | // 29 = 32 - 2 - 1 |
| 157 | return 255.0f * x2.invert() * x32 * x64.invert(); |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 158 | } |
| 159 | |
msarett | d280957 | 2016-06-20 06:07:45 -0700 | [diff] [blame^] | 160 | static Sk4f linear_to_srgb(const Sk4f& x) { |
| 161 | // Approximation of the sRGB gamma curve (within 1 when scaled to 8-bit pixels). |
| 162 | // For 0.00000f <= x < 0.00349f, 12.92 * x |
| 163 | // For 0.00349f <= x <= 1.00000f, 0.679*(x.^0.5) + 0.423*x.^(0.25) - 0.101 |
| 164 | // Note that 0.00349 was selected because it is a point where both functions produce the |
| 165 | // same pixel value when rounded. |
| 166 | auto rsqrt = x.rsqrt(), |
| 167 | sqrt = rsqrt.invert(), |
| 168 | ftrt = rsqrt.rsqrt(); |
| 169 | |
| 170 | auto hi = (-0.101115084998961f * 255.0f) + |
| 171 | (+0.678513029959381f * 255.0f) * sqrt + |
| 172 | (+0.422602055039580f * 255.0f) * ftrt; |
| 173 | |
| 174 | auto lo = (12.92f * 255.0f) * x; |
| 175 | |
| 176 | auto mask = (x < 0.00349f); |
| 177 | return mask.thenElse(lo, hi); |
| 178 | } |
| 179 | |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 180 | static Sk4f clamp_0_to_255(const Sk4f& x) { |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 181 | // The order of the arguments is important here. We want to make sure that NaN |
| 182 | // clamps to zero. Note that max(NaN, 0) = 0, while max(0, NaN) = NaN. |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 183 | return Sk4f::Min(Sk4f::Max(x, 0.0f), 255.0f); |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 184 | } |
| 185 | |
msarett | d280957 | 2016-06-20 06:07:45 -0700 | [diff] [blame^] | 186 | template <const float (&linear_from_curve)[256], Sk4f (*linear_to_curve)(const Sk4f&)> |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 187 | static void color_xform_RGB1(uint32_t* dst, const uint32_t* src, int len, |
| 188 | const float matrix[16]) { |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 189 | // Load transformation matrix. |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 190 | auto rXgXbX = Sk4f::Load(matrix + 0), |
| 191 | rYgYbY = Sk4f::Load(matrix + 4), |
| 192 | rZgZbZ = Sk4f::Load(matrix + 8); |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 193 | |
| 194 | while (len >= 4) { |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 195 | // Convert to linear. The look-up table has perfect accuracy. |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 196 | auto reds = Sk4f{linear_from_curve[(src[0] >> 0) & 0xFF], |
| 197 | linear_from_curve[(src[1] >> 0) & 0xFF], |
| 198 | linear_from_curve[(src[2] >> 0) & 0xFF], |
| 199 | linear_from_curve[(src[3] >> 0) & 0xFF]}; |
| 200 | auto greens = Sk4f{linear_from_curve[(src[0] >> 8) & 0xFF], |
| 201 | linear_from_curve[(src[1] >> 8) & 0xFF], |
| 202 | linear_from_curve[(src[2] >> 8) & 0xFF], |
| 203 | linear_from_curve[(src[3] >> 8) & 0xFF]}; |
| 204 | auto blues = Sk4f{linear_from_curve[(src[0] >> 16) & 0xFF], |
| 205 | linear_from_curve[(src[1] >> 16) & 0xFF], |
| 206 | linear_from_curve[(src[2] >> 16) & 0xFF], |
| 207 | linear_from_curve[(src[3] >> 16) & 0xFF]}; |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 208 | |
| 209 | // Apply the transformation matrix to dst gamut. |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 210 | auto dstReds = rXgXbX[0]*reds + rYgYbY[0]*greens + rZgZbZ[0]*blues, |
| 211 | dstGreens = rXgXbX[1]*reds + rYgYbY[1]*greens + rZgZbZ[1]*blues, |
| 212 | dstBlues = rXgXbX[2]*reds + rYgYbY[2]*greens + rZgZbZ[2]*blues; |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 213 | |
| 214 | // Convert to dst gamma. |
msarett | d280957 | 2016-06-20 06:07:45 -0700 | [diff] [blame^] | 215 | dstReds = linear_to_curve(dstReds); |
| 216 | dstGreens = linear_to_curve(dstGreens); |
| 217 | dstBlues = linear_to_curve(dstBlues); |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 218 | |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 219 | // Clamp floats to byte range. |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 220 | dstReds = clamp_0_to_255(dstReds); |
| 221 | dstGreens = clamp_0_to_255(dstGreens); |
| 222 | dstBlues = clamp_0_to_255(dstBlues); |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 223 | |
| 224 | // Convert to bytes and store to memory. |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 225 | auto rgba = (Sk4i{(int)0xFF000000} ) |
| 226 | | (SkNx_cast<int>(dstReds) ) |
| 227 | | (SkNx_cast<int>(dstGreens) << 8) |
| 228 | | (SkNx_cast<int>(dstBlues) << 16); |
| 229 | rgba.store(dst); |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 230 | |
| 231 | dst += 4; |
| 232 | src += 4; |
| 233 | len -= 4; |
| 234 | } |
| 235 | |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 236 | while (len > 0) { |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 237 | // Splat r,g,b across a register each. |
| 238 | auto r = Sk4f{linear_from_curve[(*src >> 0) & 0xFF]}, |
| 239 | g = Sk4f{linear_from_curve[(*src >> 8) & 0xFF]}, |
| 240 | b = Sk4f{linear_from_curve[(*src >> 16) & 0xFF]}; |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 241 | |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 242 | // Apply transformation matrix to dst gamut. |
| 243 | auto dstPixel = rXgXbX*r + rYgYbY*g + rZgZbZ*b; |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 244 | |
| 245 | // Convert to dst gamma. |
msarett | d280957 | 2016-06-20 06:07:45 -0700 | [diff] [blame^] | 246 | dstPixel = linear_to_curve(dstPixel); |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 247 | |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 248 | // Clamp floats to byte range. |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 249 | dstPixel = clamp_0_to_255(dstPixel); |
| 250 | |
| 251 | // Convert to bytes and store to memory. |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 252 | uint32_t rgba; |
| 253 | SkNx_cast<uint8_t>(dstPixel).store(&rgba); |
| 254 | rgba |= 0xFF000000; |
| 255 | *dst = rgba; |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 256 | |
| 257 | dst += 1; |
| 258 | src += 1; |
| 259 | len -= 1; |
| 260 | } |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 261 | } |
| 262 | |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 263 | static void color_xform_RGB1_srgb_to_2dot2(uint32_t* dst, const uint32_t* src, int len, |
| 264 | const float matrix[16]) { |
msarett | d280957 | 2016-06-20 06:07:45 -0700 | [diff] [blame^] | 265 | color_xform_RGB1<linear_from_srgb, linear_to_2dot2>(dst, src, len, matrix); |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 266 | } |
| 267 | |
| 268 | static void color_xform_RGB1_2dot2_to_2dot2(uint32_t* dst, const uint32_t* src, int len, |
| 269 | const float matrix[16]) { |
msarett | d280957 | 2016-06-20 06:07:45 -0700 | [diff] [blame^] | 270 | color_xform_RGB1<linear_from_2dot2, linear_to_2dot2>(dst, src, len, matrix); |
| 271 | } |
| 272 | |
| 273 | static void color_xform_RGB1_srgb_to_srgb(uint32_t* dst, const uint32_t* src, int len, |
| 274 | const float matrix[16]) { |
| 275 | color_xform_RGB1<linear_from_srgb, linear_to_srgb>(dst, src, len, matrix); |
| 276 | } |
| 277 | |
| 278 | static void color_xform_RGB1_2dot2_to_srgb(uint32_t* dst, const uint32_t* src, int len, |
| 279 | const float matrix[16]) { |
| 280 | color_xform_RGB1<linear_from_2dot2, linear_to_srgb>(dst, src, len, matrix); |
msarett | dea0340 | 2016-06-16 10:50:55 -0700 | [diff] [blame] | 281 | } |
| 282 | |
mtklein | 64f061a | 2016-06-17 12:09:16 -0700 | [diff] [blame] | 283 | } // namespace SK_OPTS_NS |
msarett | a9e878c | 2016-06-08 14:43:53 -0700 | [diff] [blame] | 284 | |
| 285 | #endif // SkColorXform_opts_DEFINED |