+enum Curves {
+ MAGMA,
+ INFERNO,
+ PLASMA,
+ VIRIDIS,
+ TURBO,
+ CIVIDIS,
+ NB_CURVES,
+};
+
+enum Presets {
+ PRESET_MAGMA,
+ PRESET_INFERNO,
+ PRESET_PLASMA,
+ PRESET_VIRIDIS,
+ PRESET_TURBO,
+ PRESET_CIVIDIS,
+ PRESET_RANGE1,
+ PRESET_RANGE2,
+ PRESET_SHADOWS,
+ PRESET_HIGHLIGHTS,
+ NB_PRESETS,
+};
+
+typedef struct Curve {
+ double coef[3][8];
+} Curve;
+
+typedef struct Fill {
+ float fill[4];
+} Fill;
+
+typedef struct Range {
+ int start, end;
+} Range;
+
+typedef struct Preset {
+ int nb_segments;
+ const Range *ranges;
+ const Curve *curves;
+ const Fill *fills;
+} Preset;
+
+static const Range full_range = {0, 256};
+static const Range spec1_range[] = {{0, 16}, {16, 236}, {236, 256}};
+static const Range spec2_range[] = {{0, 16}, {16, 22}, {22, 226}, {226, 236}, {236, 256}};
+static const Range shadows_range[] = {{0, 32}, {32, 256}};
+static const Range highlights_range[] = {{0, 214}, {214, 224}, {224, 256}};
+
+static const Fill spec1_fills[] = {{{0.5f, 0.f, .5f, 1.f}}, {{-1.f, -1.f, -1.f, 1.f}}, {{1.f, 0.f, 0.f, 1.f}}};
+static const Fill spec2_fills[] = {{{0.5f, 0.f, .5f, 1.f}}, {{0.f, 1.f, 1.f, 1.f}}, {{-1.f, -1.f, -1.f, 1.f}}, {{1.f, 1.f, 0.f, 1.f}}, {{1.f, 0.f, 0.f, 1.f}}};
+static const Fill shadows_fills[] = {{{0.8f, 0.4f, .8f, 1.f}}, {{-1.f, -1.f, -1.f, 1.f}}};
+static const Fill highlights_fills[] = {{{-1.f, -1.f, -1.f, 1.f}}, {{1.f, 0.3f, 0.6f, 1.f}}, {{1.f, 0.2f, .5f, 1.f}}};
+
+static const Curve curves[] =
+{
+ [MAGMA] = {{
+ {-7.5631093e-16, 7.4289183e-13, -2.8525484e-10, 5.4446085e-08, -5.5596238e-06, 3.0569325e-04, -2.3137421e-03, 1.2152095e-02 },
+ { 1.3217636e-15, -1.2214648e-12, 4.4319712e-10, -8.0197993e-08, 7.6598370e-06, -3.6523704e-04, 8.4836670e-03, -2.5536888e-02 },
+ {-1.1446568e-15, 1.0013446e-12, -3.5651575e-10, 6.6775016e-08, -6.7120346e-06, 2.7346619e-04, 4.7969657e-03, 1.1971441e-02 },
+ }},
+ [INFERNO] = {{
+ {-3.9848859e-18, 9.4821649e-14, -6.7371977e-11, 1.8469937e-08, -2.5359307e-06, 1.7959053e-04, 3.9782564e-04, 2.8845935e-04 },
+ { 6.8408539e-16, -6.5499979e-13, 2.4562526e-10, -4.5989298e-08, 4.5723324e-06, -2.2111913e-04, 5.2023164e-03, -1.1226064e-02 },
+ {-2.9921470e-15, 2.5864165e-12, -8.7403799e-10, 1.4713388e-07, -1.2701505e-05, 4.5159935e-04, 3.1087989e-03, 1.9122831e-02 },
+ }},
+ [PLASMA] = {{
+ { 3.6196089e-16, -3.3623041e-13, 1.2324010e-10, -2.2769060e-08, 2.2297792e-06, -1.2567829e-04, 9.9791629e-03, 5.7247918e-02 },
+ { 5.0262888e-16, -5.3193896e-13, 2.2451715e-10, -4.7529623e-08, 5.1374873e-06, -2.3260136e-04, 3.1502825e-03, 1.5362491e-02 },
+ {-1.7782261e-16, 2.2487839e-13, -1.0610236e-10, 2.4112644e-08, -2.6331623e-06, 8.9499751e-05, 2.1386328e-03, 5.3824268e-01 },
+ }},
+ [VIRIDIS] = {{
+ { 9.4850045e-16, -8.6629383e-13, 3.0310944e-10, -5.1340396e-08, 4.6024275e-06, -2.2744239e-04, 4.5559993e-03, 2.5662350e-01 },
+ { 9.6461041e-17, -6.9209477e-14, 1.7625397e-11, -2.0229773e-09, 1.4900110e-07, -1.9315187e-05, 5.8967339e-03, 3.9544827e-03 },
+ { 5.1785449e-16, -3.6663004e-13, 1.0249990e-10, -1.5431998e-08, 1.5007941e-06, -1.2001502e-04, 7.6951526e-03, 3.2292815e-01 },
+ }},
+ [TURBO] = {{
+ {-4.3683890e-15, 3.7020347e-12, -1.1712592e-09, 1.6401790e-07, -8.6842919e-06, -1.8542465e-06, 8.4485325e-03, 1.6267077e-01 },
+ {-4.0011069e-16, 2.7861423e-13, -6.3388921e-11, 5.8872238e-09, -5.4466522e-07, 1.8037114e-05, 1.0599869e-02, 7.6914696e-02 },
+ {-2.8242609e-15, 2.9234108e-12, -1.1726546e-09, 2.2552115e-07, -2.0059387e-05, 5.0595552e-04, 1.7714932e-02, 2.7271836e-01 },
+ }},
+ [CIVIDIS] = {{
+ {-9.5484131e-16, 9.6988184e-13, -4.0058766e-10, 8.5743924e-08, -9.9644797e-06, 5.9197908e-04, -1.0361579e-02, 3.3164429e-02 },
+ { 1.2731941e-17, -9.4238449e-15, 2.2808841e-12, -1.1548296e-10, -2.3888913e-08, 3.8986680e-06, 2.5879330e-03, 1.2769733e-01 },
+ { 4.6004608e-16, -5.0686849e-13, 2.2753449e-10, -5.3074099e-08, 6.7196096e-06, -4.4120020e-04, 1.3435551e-02, 2.8293355e-01 },
+ }},
+};
+
+static const Preset presets[] =
+{
+ [PRESET_MAGMA] = { 1, &full_range, &curves[MAGMA], NULL },
+ [PRESET_INFERNO] = { 1, &full_range, &curves[INFERNO], NULL },
+ [PRESET_PLASMA] = { 1, &full_range, &curves[PLASMA], NULL },
+ [PRESET_VIRIDIS] = { 1, &full_range, &curves[VIRIDIS], NULL },
+ [PRESET_TURBO] = { 1, &full_range, &curves[TURBO], NULL },
+ [PRESET_CIVIDIS] = { 1, &full_range, &curves[CIVIDIS], NULL },
+ [PRESET_RANGE1] = { 3, spec1_range, NULL, spec1_fills },
+ [PRESET_RANGE2] = { 5, spec2_range, NULL, spec2_fills },
+ [PRESET_SHADOWS] = { 2, shadows_range, NULL, shadows_fills },
+ [PRESET_HIGHLIGHTS] = { 3, highlights_range, NULL, highlights_fills },
+};
+