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#include "color.h"
#include <the_Foundation/string.h>
static const iColor transparent_;
static iColor palette_[max_ColorId] = {
{ 0, 0, 0, 255 },
{ 40, 40, 40, 255 },
{ 80, 80, 80, 255 },
{ 160, 160, 160, 255 },
{ 255, 255, 255, 255 },
{ 106, 80, 0, 255 },
{ 255, 192, 0, 255 },
{ 0, 96, 128, 255 },
{ 0, 192, 255, 255 },
{ 255, 255, 32, 255 },
{ 255, 64, 64, 255 },
{ 255, 0, 255, 255 },
{ 132, 132, 255, 255 },
{ 0, 200, 0, 255 },
/* theme colors left black until theme is seeded */
};
iColor get_Color(int color) {
const iColor *rgba = &transparent_;
if (color >= 0 && color < max_ColorId) {
rgba = &palette_[color];
}
return *rgba;
}
void set_Color(int color, iColor rgba) {
if (color >= tmFirst_ColorId && color < max_ColorId) {
palette_[color] = rgba;
}
}
iLocalDef iFloat4 normalize_(iColor d) {
return divf_F4(init_F4(d.r, d.g, d.b, d.a), 255.0f);
}
iLocalDef iColor toColor_(iFloat4 d) {
const iFloat4 i = addf_F4(mulf_F4(d, 255.0f), 0.5f);
return (iColor){ (uint8_t) x_F4(i),
(uint8_t) y_F4(i),
(uint8_t) z_F4(i),
(uint8_t) w_F4(i) };
}
iHSLColor hsl_Color(iColor color) {
float rgb[4];
store_F4(normalize_(color), rgb);
int compMax, compMin;
if (rgb[0] >= rgb[1] && rgb[0] >= rgb[2]) {
compMax = 0;
}
else if (rgb[1] >= rgb[0] && rgb[1] >= rgb[2]) {
compMax = 1;
}
else {
compMax = 2;
}
if (rgb[0] <= rgb[1] && rgb[0] <= rgb[2]) {
compMin = 0;
}
else if (rgb[1] <= rgb[0] && rgb[1] <= rgb[2]) {
compMin = 1;
}
else {
compMin = 2;
}
const float rgbMax = rgb[compMax];
const float rgbMin = rgb[compMin];
const float lum = (rgbMax + rgbMin) / 2.0f;
float hue = 0.0f;
float sat = 0.0f;
if (fabsf(rgbMax - rgbMin) > 0.00001f) {
float chr = rgbMax - rgbMin;
sat = chr / (1.0f - fabsf(2.0f * lum - 1.0f));
if (compMax == 0) {
hue = (rgb[1] - rgb[2]) / chr + (rgb[1] < rgb[2] ? 6 : 0);
}
else if (compMax == 1) {
hue = (rgb[2] - rgb[0]) / chr + 2;
}
else {
hue = (rgb[0] - rgb[1]) / chr + 4;
}
}
return (iHSLColor){ hue * 60, sat, lum, rgb[3] }; /* hue in degrees */
}
static float hueToRgb_(float p, float q, float t) {
if (t < 0.0f) t += 1.0f;
if (t > 1.0f) t -= 1.0f;
if (t < 1.0f / 6.0f) return p + (q - p) * 6.0f * t;
if (t < 1.0f / 2.0f) return q;
if (t < 2.0f / 3.0f) return p + (q - p) * (2.0f / 3.0f - t) * 6.0f;
return p;
}
iColor rgb_HSLColor(iHSLColor hsl) {
float r, g, b;
hsl.hue /= 360.0f;
hsl.hue = iWrapf(hsl.hue, 0, 1);
hsl.sat = iClamp(hsl.sat, 0.0f, 1.0f);
hsl.lum = iClamp(hsl.lum, 0.0f, 1.0f);
if (hsl.sat < 0.00001f) {
r = g = b = hsl.lum;
}
else {
const float q = hsl.lum < 0.5f ? hsl.lum * (1 + hsl.sat)
: (hsl.lum + hsl.sat - hsl.lum * hsl.sat);
const float p = 2 * hsl.lum - q;
r = hueToRgb_(p, q, hsl.hue + 1.0f / 3.0f);
g = hueToRgb_(p, q, hsl.hue);
b = hueToRgb_(p, q, hsl.hue - 1.0f / 3.0f);
}
return toColor_(init_F4(r, g, b, hsl.a));
}
const char *escape_Color(int color) {
static const char *esc[] = {
black_ColorEscape,
gray25_ColorEscape,
gray50_ColorEscape,
gray75_ColorEscape,
white_ColorEscape,
brown_ColorEscape,
orange_ColorEscape,
teal_ColorEscape,
cyan_ColorEscape,
yellow_ColorEscape,
red_ColorEscape,
magenta_ColorEscape,
blue_ColorEscape,
green_ColorEscape,
};
if (color >= 0 && color < (int) iElemCount(esc)) {
return esc[color];
}
return format_CStr("\r%c", color + '0');
}
iHSLColor setSat_HSLColor(iHSLColor d, float sat) {
d.sat = iClamp(sat, 0, 1);
return d;
}
iHSLColor setLum_HSLColor(iHSLColor d, float lum) {
d.lum = iClamp(lum, 0, 1);
return d;
}
iHSLColor addSatLum_HSLColor(iHSLColor d, float sat, float lum) {
d.sat = iClamp(d.sat + sat, 0, 1);
d.lum = iClamp(d.lum + lum, 0, 1);
return d;
}
iColor ansi_Color(iRangecc escapeSequence, int fallback) {
iColor clr = get_Color(fallback);
for (const char *ch = escapeSequence.start; ch < escapeSequence.end; ch++) {
char *endPtr;
unsigned long arg = strtoul(ch, &endPtr, 10);
ch = endPtr;
switch (arg) {
default:
break;
case 30:
clr = (iColor){ 0, 0, 0, 255 };
break;
case 31:
clr = (iColor){ 170, 0, 0, 255 };
break;
case 32:
clr = (iColor){ 0, 170, 0, 255 };
break;
case 33:
clr = (iColor){ 170, 85, 0, 255 };
break;
case 34:
clr = (iColor){ 0, 0, 170, 255 };
break;
case 35:
clr = (iColor){ 170, 0, 170, 255 };
break;
case 36:
clr = (iColor){ 0, 170, 170, 255 };
break;
case 37:
clr = (iColor){ 170, 170, 170, 255 };
break;
case 90:
clr = (iColor){ 85, 85, 85, 255 };
break;
case 91:
clr = (iColor){ 255, 85, 85, 255 };
break;
case 92:
clr = (iColor){ 85, 255, 85, 255 };
break;
case 93:
clr = (iColor){ 255, 255, 85, 255 };
break;
case 94:
clr = (iColor){ 85, 85, 255, 255 };
break;
case 95:
clr = (iColor){ 255, 85, 255, 255 };
break;
case 96:
clr = (iColor){ 85, 255, 255, 255 };
break;
case 97:
clr = (iColor){ 255, 255, 255, 255 };
break;
}
}
return clr;
}
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