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Update generation of srgb to linear lookup to include python script
This commit is contained in:
Ryan Huffman
parent
611779b58b
commit
28b3ff9bca
2 changed files with 69 additions and 2 deletions
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@ -17,8 +17,53 @@
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#include "DependencyManager.h"
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static const float srgbToLinearLookupTable[256] =
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{ 0.0f, 0.000303526983549f, 0.000607053967098f, 0.000910580950647f, 0.0012141079342f, 0.00151763491774f, 0.00182116190129f, 0.00212468888484f, 0.00242821586839f, 0.00273174285194f, 0.00303526983549f, 0.00251584218443f, 0.00279619194822f, 0.00309396642819f, 0.00340946205345f, 0.00374296799396f, 0.00409476661624f, 0.00446513389425f, 0.00485433978143f, 0.00526264854875f, 0.00569031909303f, 0.00613760521883f, 0.00660475589722f, 0.00709201550367f, 0.00759962403765f, 0.00812781732551f, 0.00867682720861f, 0.00924688171802f, 0.00983820523704f, 0.0104510186528f, 0.0110855394981f, 0.0117419820834f, 0.0124205576216f, 0.0131214743443f, 0.0138449376117f, 0.0145911500156f, 0.0153603114768f, 0.0161526193372f, 0.0169682684465f, 0.0178074512441f, 0.0186703578377f, 0.0195571760767f, 0.0204680916222f, 0.0214032880141f, 0.0223629467344f, 0.0233472472675f, 0.0243563671578f, 0.0253904820647f, 0.026449765815f, 0.0275343904531f, 0.0286445262888f, 0.0297803419432f, 0.0309420043928f, 0.0321296790111f, 0.0333435296099f, 0.0345837184768f, 0.0358504064137f, 0.0371437527716f, 0.0384639154854f, 0.0398110511069f, 0.0411853148367f, 0.0425868605546f, 0.0440158408496f, 0.045472407048f, 0.046956709241f, 0.0484688963113f, 0.0500091159586f, 0.0515775147244f, 0.0531742380159f, 0.0547994301291f, 0.0564532342711f, 0.058135792582f, 0.0598472461555f, 0.0615877350593f, 0.063357398355f, 0.0651563741167f, 0.0669847994499f, 0.0688428105093f, 0.0707305425158f, 0.0726481297741f, 0.0745957056885f, 0.0765734027789f, 0.0785813526965f, 0.0806196862387f, 0.0826885333636f, 0.0847880232044f, 0.086918284083f, 0.0890794435236f, 0.0912716282659f, 0.0934949642776f, 0.0957495767668f, 0.0980355901944f, 0.100353128286f, 0.102702314041f, 0.10508326975f, 0.107496116997f, 0.109940976678f, 0.112417969007f, 0.114927213525f, 0.117468829116f, 0.120042934009f, 0.122649645793f, 0.125289081424f, 0.127961357236f, 0.130666588944f, 0.13340489166f, 0.136176379898f, 0.138981167581f, 0.141819368051f, 0.144691094076f, 0.147596457859f, 0.150535571041f, 0.153508544716f, 0.156515489432f, 0.1595565152f, 0.1626317315f, 0.16574124729f, 0.168885171012f, 0.172063610595f, 0.175276673468f, 0.178524466557f, 0.181807096302f, 0.185124668654f, 0.188477289086f, 0.191865062595f, 0.195288093712f, 0.198746486503f, 0.202240344578f, 0.205769771096f, 0.209334868766f, 0.212935739858f, 0.216572486205f, 0.220245209207f, 0.223954009837f, 0.227698988648f, 0.231480245773f, 0.235297880934f, 0.239151993444f, 0.243042682212f, 0.246970045747f, 0.250934182163f, 0.254935189183f, 0.258973164144f, 0.263048203998f, 0.267160405319f, 0.271309864307f, 0.27549667679f, 0.279720938228f, 0.283982743718f, 0.288282187998f, 0.292619365448f, 0.296994370096f, 0.30140729562f, 0.305858235354f, 0.310347282289f, 0.314874529074f, 0.319440068025f, 0.324043991126f, 0.32868639003f, 0.333367356062f, 0.338086980228f, 0.34284535321f, 0.347642565374f, 0.352478706774f, 0.357353867148f, 0.36226813593f, 0.367221602246f, 0.372214354918f, 0.37724648247f, 0.382318073128f, 0.387429214822f, 0.392579995191f, 0.397770501584f, 0.403000821062f, 0.408271040402f, 0.413581246099f, 0.418931524369f, 0.424321961148f, 0.4297526421f, 0.435223652615f, 0.440735077813f, 0.446287002544f, 0.451879511396f, 0.45751268869f, 0.463186618488f, 0.46890138459f, 0.474657070542f, 0.480453759632f, 0.486291534897f, 0.492170479122f, 0.498090674843f, 0.50405220435f, 0.510055149687f, 0.516099592656f, 0.522185614816f, 0.528313297489f, 0.534482721758f, 0.54069396847f, 0.546947118241f, 0.553242251452f, 0.559579448254f, 0.565958788573f, 0.572380352104f, 0.578844218319f, 0.585350466467f, 0.591899175574f, 0.598490424448f, 0.605124291677f, 0.611800855632f, 0.61852019447f, 0.625282386134f, 0.632087508355f, 0.638935638652f, 0.645826854338f, 0.652761232515f, 0.659738850081f, 0.66675978373f, 0.673824109951f, 0.680931905032f, 0.688083245062f, 0.695278205929f, 0.702516863324f, 0.709799292744f, 0.717125569488f, 0.724495768663f, 0.731909965185f, 0.739368233777f, 0.746870648974f, 0.754417285121f, 0.762008216379f, 0.76964351672f, 0.777323259932f, 0.785047519623f, 0.792816369214f, 0.800629881949f, 0.80848813089f, 0.816391188922f, 0.824339128751f, 0.832332022907f, 0.840369943747f, 0.848452963452f, 0.856581154031f, 0.864754587319f, 0.872973334984f, 0.881237468522f, 0.889547059261f, 0.897902178361f, 0.906302896816f, 0.914749285456f, 0.923241414944f, 0.931779355781f, 0.940363178305f, 0.948992952695f, 0.957668748966f, 0.966390636975f, 0.975158686423f };
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// Generated from python script in repository at `tools/srgb_gen.py`
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static const float srgbToLinearLookupTable[256] = {
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0.0f, 0.000303526983549f, 0.000607053967098f, 0.000910580950647f, 0.0012141079342f, 0.00151763491774f, 0.00182116190129f,
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0.00212468888484f, 0.00242821586839f, 0.00273174285194f, 0.00303526983549f, 0.00251584218443f, 0.00279619194822f,
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0.00309396642819f, 0.00340946205345f, 0.00374296799396f, 0.00409476661624f, 0.00446513389425f, 0.00485433978143f,
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0.00526264854875f, 0.00569031909303f, 0.00613760521883f, 0.00660475589722f, 0.00709201550367f, 0.00759962403765f,
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0.00812781732551f, 0.00867682720861f, 0.00924688171802f, 0.00983820523704f, 0.0104510186528f, 0.0110855394981f,
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0.0117419820834f, 0.0124205576216f, 0.0131214743443f, 0.0138449376117f, 0.0145911500156f, 0.0153603114768f,
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0.0161526193372f, 0.0169682684465f, 0.0178074512441f, 0.0186703578377f, 0.0195571760767f, 0.0204680916222f,
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0.0214032880141f, 0.0223629467344f, 0.0233472472675f, 0.0243563671578f, 0.0253904820647f, 0.026449765815f,
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0.0275343904531f, 0.0286445262888f, 0.0297803419432f, 0.0309420043928f, 0.0321296790111f, 0.0333435296099f,
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0.0345837184768f, 0.0358504064137f, 0.0371437527716f, 0.0384639154854f, 0.0398110511069f, 0.0411853148367f,
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0.0425868605546f, 0.0440158408496f, 0.045472407048f, 0.046956709241f, 0.0484688963113f, 0.0500091159586f,
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0.0515775147244f, 0.0531742380159f, 0.0547994301291f, 0.0564532342711f, 0.058135792582f, 0.0598472461555f,
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0.0615877350593f, 0.063357398355f, 0.0651563741167f, 0.0669847994499f, 0.0688428105093f, 0.0707305425158f,
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0.0726481297741f, 0.0745957056885f, 0.0765734027789f, 0.0785813526965f, 0.0806196862387f, 0.0826885333636f,
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0.0847880232044f, 0.086918284083f, 0.0890794435236f, 0.0912716282659f, 0.0934949642776f, 0.0957495767668f,
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0.0980355901944f, 0.100353128286f, 0.102702314041f, 0.10508326975f, 0.107496116997f, 0.109940976678f,
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0.112417969007f, 0.114927213525f, 0.117468829116f, 0.120042934009f, 0.122649645793f, 0.125289081424f,
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0.127961357236f, 0.130666588944f, 0.13340489166f, 0.136176379898f, 0.138981167581f, 0.141819368051f,
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0.144691094076f, 0.147596457859f, 0.150535571041f, 0.153508544716f, 0.156515489432f, 0.1595565152f,
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0.1626317315f, 0.16574124729f, 0.168885171012f, 0.172063610595f, 0.175276673468f, 0.178524466557f,
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0.181807096302f, 0.185124668654f, 0.188477289086f, 0.191865062595f, 0.195288093712f, 0.198746486503f,
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0.202240344578f, 0.205769771096f, 0.209334868766f, 0.212935739858f, 0.216572486205f, 0.220245209207f,
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0.223954009837f, 0.227698988648f, 0.231480245773f, 0.235297880934f, 0.239151993444f, 0.243042682212f,
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0.246970045747f, 0.250934182163f, 0.254935189183f, 0.258973164144f, 0.263048203998f, 0.267160405319f,
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0.271309864307f, 0.27549667679f, 0.279720938228f, 0.283982743718f, 0.288282187998f, 0.292619365448f,
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0.296994370096f, 0.30140729562f, 0.305858235354f, 0.310347282289f, 0.314874529074f, 0.319440068025f,
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0.324043991126f, 0.32868639003f, 0.333367356062f, 0.338086980228f, 0.34284535321f, 0.347642565374f,
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0.352478706774f, 0.357353867148f, 0.36226813593f, 0.367221602246f, 0.372214354918f, 0.37724648247f,
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0.382318073128f, 0.387429214822f, 0.392579995191f, 0.397770501584f, 0.403000821062f, 0.408271040402f,
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0.413581246099f, 0.418931524369f, 0.424321961148f, 0.4297526421f, 0.435223652615f, 0.440735077813f,
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0.446287002544f, 0.451879511396f, 0.45751268869f, 0.463186618488f, 0.46890138459f, 0.474657070542f,
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0.480453759632f, 0.486291534897f, 0.492170479122f, 0.498090674843f, 0.50405220435f, 0.510055149687f,
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0.516099592656f, 0.522185614816f, 0.528313297489f, 0.534482721758f, 0.54069396847f, 0.546947118241f,
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0.553242251452f, 0.559579448254f, 0.565958788573f, 0.572380352104f, 0.578844218319f, 0.585350466467f,
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0.591899175574f, 0.598490424448f, 0.605124291677f, 0.611800855632f, 0.61852019447f, 0.625282386134f,
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0.632087508355f, 0.638935638652f, 0.645826854338f, 0.652761232515f, 0.659738850081f, 0.66675978373f,
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0.673824109951f, 0.680931905032f, 0.688083245062f, 0.695278205929f, 0.702516863324f, 0.709799292744f,
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0.717125569488f, 0.724495768663f, 0.731909965185f, 0.739368233777f, 0.746870648974f, 0.754417285121f,
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0.762008216379f, 0.76964351672f, 0.777323259932f, 0.785047519623f, 0.792816369214f, 0.800629881949f,
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0.80848813089f, 0.816391188922f, 0.824339128751f, 0.832332022907f, 0.840369943747f, 0.848452963452f,
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0.856581154031f, 0.864754587319f, 0.872973334984f, 0.881237468522f, 0.889547059261f, 0.897902178361f,
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0.906302896816f, 0.914749285456f, 0.923241414944f, 0.931779355781f, 0.940363178305f, 0.948992952695f,
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0.957668748966f, 0.966390636975f, 0.975158686423f
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}
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class ColorUtils {
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public:
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22
tools/srgb_gen.py
Normal file
22
tools/srgb_gen.py
Normal file
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@ -0,0 +1,22 @@
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NUM_VALUES = 256
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srgb_to_linear = []
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# Calculate srgb to linear
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for i in range(NUM_VALUES):
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s = float(i) / 255
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if s < 0.04045:
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l = s / 12.92
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else:
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l = ((s + 0.044) / 1.055) ** 2.4
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srgb_to_linear.append(l)
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# Format and print
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data = "{\n "
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for i, v in enumerate(srgb_to_linear):
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data += str(v) + "f"
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if i < NUM_VALUES - 1:
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data += ", "
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if i > 0 and i % 6 == 0:
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data += "\n "
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data += "\n}"
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print(data)
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