Add bicubic texture table, as well as the script used to (re)generate it. To regenerate, just run "python bicubic_table.py > bicubic_table.h".

2 files changed, 168 insertions, 0 deletions

diff --git a/src/bicubic_table.h b/src/bicubic_table.h
new file mode 100644
index 00000000..b61b9ba3
--- /dev/null
+++ b/src/bicubic_table.h
@@ -0,0 +1,130 @@
+const float[] bicubic_tex = {
+	0.2, 1.0, 0.833333333333, 0.166666666667,
+	0.204088720925, 0.992187965834, 0.829396724701, 0.170603275299,
+	0.208229306439, 0.984378641369, 0.825400034587, 0.174599965413,
+	0.212420907874, 0.976574510623, 0.821344216665, 0.178655783335,
+	0.216662699005, 0.968777828797, 0.817230224609, 0.182769775391,
+	0.220953875426, 0.960990640339, 0.813059012095, 0.186940987905,
+	0.225293653935, 0.953214795864, 0.808831532796, 0.191168467204,
+	0.229681271957, 0.945451967972, 0.804548740387, 0.195451259613,
+	0.234115986983, 0.937703665988, 0.800211588542, 0.199788411458,
+	0.238597076022, 0.929971249668, 0.795821030935, 0.204178969065,
+	0.243123835089, 0.922255941932, 0.79137802124, 0.20862197876,
+	0.247695578698, 0.914558840653, 0.786883513133, 0.213116486867,
+	0.252311639383, 0.90688092957, 0.782338460286, 0.217661539714,
+	0.256971367229, 0.899223088369, 0.777743816376, 0.222256183624,
+	0.261674129428, 0.891586101989, 0.773100535075, 0.226899464925,
+	0.266419309847, 0.883970669194, 0.768409570058, 0.231590429942,
+	0.27120630861, 0.876377410468, 0.763671875, 0.236328125,
+	0.276034541704, 0.868806875283, 0.758888403575, 0.241111596425,
+	0.280903440584, 0.861259548768, 0.754060109456, 0.245939890544,
+	0.285812451814, 0.853735857846, 0.74918794632, 0.25081205368,
+	0.290761036698, 0.846236176857, 0.744272867839, 0.255727132161,
+	0.295748670944, 0.838760832722, 0.739315827688, 0.260684172312,
+	0.300774844327, 0.831310109672, 0.734317779541, 0.265682220459,
+	0.305839060373, 0.823884253585, 0.729279677073, 0.270720322927,
+	0.310940836049, 0.816483475952, 0.724202473958, 0.275797526042,
+	0.316079701469, 0.80910795751, 0.719087123871, 0.280912876129,
+	0.321255199604, 0.801757851568, 0.713934580485, 0.286065419515,
+	0.326466886014, 0.794433287044, 0.708745797475, 0.291254202525,
+	0.331714328576, 0.787134371247, 0.703521728516, 0.296478271484,
+	0.336997107235, 0.779861192413, 0.698263327281, 0.301736672719,
+	0.342314813753, 0.772613822026, 0.692971547445, 0.307028452555,
+	0.347667051478, 0.76539231694, 0.687647342682, 0.312352657318,
+	0.353053435115, 0.758196721311, 0.682291666667, 0.317708333333,
+	0.358473590501, 0.751027068365, 0.676905473073, 0.323094526927,
+	0.363927154404, 0.743883382007, 0.671489715576, 0.328510284424,
+	0.369413774313, 0.736765678299, 0.66604534785, 0.33395465215,
+	0.374933108243, 0.729673966794, 0.660573323568, 0.339426676432,
+	0.380484824551, 0.722608251764, 0.655074596405, 0.344925403595,
+	0.386068601748, 0.715568533318, 0.649550120036, 0.350449879964,
+	0.391684128331, 0.708554808415, 0.644000848134, 0.355999151866,
+	0.397331102613, 0.701567071798, 0.638427734375, 0.361572265625,
+	0.403009232558, 0.694605316836, 0.632831732432, 0.367168267568,
+	0.40871823563, 0.687669536295, 0.62721379598, 0.37278620402,
+	0.414457838638, 0.680759723045, 0.621574878693, 0.378425121307,
+	0.420227777594, 0.673875870699, 0.615915934245, 0.384084065755,
+	0.426027797575, 0.6670179742, 0.610237916311, 0.389762083689,
+	0.431857652583, 0.66018603035, 0.604541778564, 0.395458221436,
+	0.437717105418, 0.653380038302, 0.598828474681, 0.401171525319,
+	0.443605927552, 0.6466, 0.593098958333, 0.406901041667,
+	0.449523899007, 0.639845920588, 0.587354183197, 0.412645816803,
+	0.455470808236, 0.633117808778, 0.581595102946, 0.418404897054,
+	0.461446452007, 0.626415677192, 0.575822671254, 0.424177328746,
+	0.467450635295, 0.619739542669, 0.570037841797, 0.429962158203,
+	0.473483171168, 0.613089426553, 0.564241568247, 0.435758431753,
+	0.479543880687, 0.606465354949, 0.558434804281, 0.441565195719,
+	0.485632592794, 0.59986735897, 0.552618503571, 0.447381496429,
+	0.491749144218, 0.593295474951, 0.546793619792, 0.453206380208,
+	0.497893379365, 0.586749744657, 0.540961106618, 0.459038893382,
+	0.504065150224, 0.580230215471, 0.535121917725, 0.464878082275,
+	0.510264316266, 0.573736940568, 0.529277006785, 0.470722993215,
+	0.51649074434, 0.567269979082, 0.523427327474, 0.476572672526,
+	0.522744308578, 0.560829396251, 0.517573833466, 0.482426166534,
+	0.529024890292, 0.554415263567, 0.511717478434, 0.488282521566,
+	0.535332377868, 0.548027658908, 0.505859216054, 0.494140783946,
+	0.541666666667, 0.541666666667, 0.5, 0.5,
+	0.548027658908, 0.535332377868, 0.494140783946, 0.505859216054,
+	0.554415263567, 0.529024890292, 0.488282521566, 0.511717478434,
+	0.560829396251, 0.522744308578, 0.482426166534, 0.517573833466,
+	0.567269979082, 0.51649074434, 0.476572672526, 0.523427327474,
+	0.573736940568, 0.510264316266, 0.470722993215, 0.529277006785,
+	0.580230215471, 0.504065150224, 0.464878082275, 0.535121917725,
+	0.586749744657, 0.497893379365, 0.459038893382, 0.540961106618,
+	0.593295474951, 0.491749144218, 0.453206380208, 0.546793619792,
+	0.59986735897, 0.485632592794, 0.447381496429, 0.552618503571,
+	0.606465354949, 0.479543880687, 0.441565195719, 0.558434804281,
+	0.613089426553, 0.473483171168, 0.435758431753, 0.564241568247,
+	0.619739542669, 0.467450635295, 0.429962158203, 0.570037841797,
+	0.626415677192, 0.461446452007, 0.424177328746, 0.575822671254,
+	0.633117808778, 0.455470808236, 0.418404897054, 0.581595102946,
+	0.639845920588, 0.449523899007, 0.412645816803, 0.587354183197,
+	0.6466, 0.443605927552, 0.406901041667, 0.593098958333,
+	0.653380038302, 0.437717105418, 0.401171525319, 0.598828474681,
+	0.66018603035, 0.431857652583, 0.395458221436, 0.604541778564,
+	0.6670179742, 0.426027797575, 0.389762083689, 0.610237916311,
+	0.673875870699, 0.420227777594, 0.384084065755, 0.615915934245,
+	0.680759723045, 0.414457838638, 0.378425121307, 0.621574878693,
+	0.687669536295, 0.40871823563, 0.37278620402, 0.62721379598,
+	0.694605316836, 0.403009232558, 0.367168267568, 0.632831732432,
+	0.701567071798, 0.397331102613, 0.361572265625, 0.638427734375,
+	0.708554808415, 0.391684128331, 0.355999151866, 0.644000848134,
+	0.715568533318, 0.386068601748, 0.350449879964, 0.649550120036,
+	0.722608251764, 0.380484824551, 0.344925403595, 0.655074596405,
+	0.729673966794, 0.374933108243, 0.339426676432, 0.660573323568,
+	0.736765678299, 0.369413774313, 0.33395465215, 0.66604534785,
+	0.743883382007, 0.363927154404, 0.328510284424, 0.671489715576,
+	0.751027068365, 0.358473590501, 0.323094526927, 0.676905473073,
+	0.758196721311, 0.353053435115, 0.317708333333, 0.682291666667,
+	0.76539231694, 0.347667051478, 0.312352657318, 0.687647342682,
+	0.772613822026, 0.342314813753, 0.307028452555, 0.692971547445,
+	0.779861192413, 0.336997107235, 0.301736672719, 0.698263327281,
+	0.787134371247, 0.331714328576, 0.296478271484, 0.703521728516,
+	0.794433287044, 0.326466886014, 0.291254202525, 0.708745797475,
+	0.801757851568, 0.321255199604, 0.286065419515, 0.713934580485,
+	0.80910795751, 0.316079701469, 0.280912876129, 0.719087123871,
+	0.816483475952, 0.310940836049, 0.275797526042, 0.724202473958,
+	0.823884253585, 0.305839060373, 0.270720322927, 0.729279677073,
+	0.831310109672, 0.300774844327, 0.265682220459, 0.734317779541,
+	0.838760832722, 0.295748670944, 0.260684172312, 0.739315827688,
+	0.846236176857, 0.290761036698, 0.255727132161, 0.744272867839,
+	0.853735857846, 0.285812451814, 0.25081205368, 0.74918794632,
+	0.861259548768, 0.280903440584, 0.245939890544, 0.754060109456,
+	0.868806875283, 0.276034541704, 0.241111596425, 0.758888403575,
+	0.876377410468, 0.27120630861, 0.236328125, 0.763671875,
+	0.883970669194, 0.266419309847, 0.231590429942, 0.768409570058,
+	0.891586101989, 0.261674129428, 0.226899464925, 0.773100535075,
+	0.899223088369, 0.256971367229, 0.222256183624, 0.777743816376,
+	0.90688092957, 0.252311639383, 0.217661539714, 0.782338460286,
+	0.914558840653, 0.247695578698, 0.213116486867, 0.786883513133,
+	0.922255941932, 0.243123835089, 0.20862197876, 0.79137802124,
+	0.929971249668, 0.238597076022, 0.204178969065, 0.795821030935,
+	0.937703665988, 0.234115986983, 0.199788411458, 0.800211588542,
+	0.945451967972, 0.229681271957, 0.195451259613, 0.804548740387,
+	0.953214795864, 0.225293653935, 0.191168467204, 0.808831532796,
+	0.960990640339, 0.220953875426, 0.186940987905, 0.813059012095,
+	0.968777828797, 0.216662699005, 0.182769775391, 0.817230224609,
+	0.976574510623, 0.212420907874, 0.178655783335, 0.821344216665,
+	0.984378641369, 0.208229306439, 0.174599965413, 0.825400034587,
+	0.992187965834, 0.204088720925, 0.170603275299, 0.829396724701,
+	NULL }
diff --git a/src/bicubic_table.py b/src/bicubic_table.py
new file mode 100755
index 00000000..45101173
--- /dev/null
+++ b/src/bicubic_table.py
@@ -0,0 +1,38 @@
+#!/usr/bin/python
+
+def texgen():
+
+ tex = []
+
+ for i in range(0,512,4):
+
+  a = i / 512.0
+  a2 = a ** 2
+  a3 = a ** 3
+
+  w0 = 1 / 6.0 * (-a3 + 3 * a2 + -3 * a + 1)
+  w1 = 1 / 6.0 * (3 * a3 + -6 * a2 + 4)
+  w2 = 1 / 6.0 * (-3 * a3 + 3 * a2 + 3 * a + 1)
+  w3 = 1 / 6.0 * a3
+
+  tex.append(1 - (w1 / (w0 + w1)) + a)
+  tex.append(1 + (w3 / (w2 + w3)) - a)
+  tex.append(w0 + w1)
+  tex.append(w2 + w3)
+
+ return tex
+
+def printrow(l, offset):
+
+ seq = [ str(i) for i in l[offset:offset+4] ]
+ return "\t" + ", ".join(seq) + ","
+
+l = texgen()
+
+print "const float[] bicubic_tex = {"
+
+for i in range(0, 512, 4):
+
+ print printrow(l, i)
+
+print "\tNULL }"