100 lines
1.9 KiB
C++
100 lines
1.9 KiB
C++
struct Color {
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uint8_t r;
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uint8_t g;
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uint8_t b;
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/** no-init */
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Color() {
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;
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}
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private:
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/** Hidden ctor. RGB */
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Color(const uint8_t r, const uint8_t g, const uint8_t b) : r(r), g(g), b(b) {
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;
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}
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public:
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/** get X-percent [0:100] of this color = darker/brighter */
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Color inline getPercent(const int percent) const {
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return Color(r*percent/100, g*percent/100, b*percent/100);
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}
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/** mix the two given colors */
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static Color mix(const Color c1, const Color c2, int percentC1) {
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return Color(
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((c1.r * percentC1) + (c2.r * (100-percentC1))) / 100,
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((c1.g * percentC1) + (c2.g * (100-percentC1))) / 100,
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((c1.b * percentC1) + (c2.b * (100-percentC1))) / 100
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);
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}
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static inline Color fromRGB(const uint8_t r, const uint8_t g, const uint8_t b) {
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return Color(r,g,b);
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}
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static inline Color fromHSV(const uint8_t h, const uint8_t s, const uint8_t v) {
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Color c; c.setHSV(h,s,v); return c;
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}
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void setHSV(const uint8_t h, const uint8_t s, const uint8_t v) {
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uint8_t region, remainder, p, q, t;
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region = h / 43;
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remainder = (h - (region * 43)) * 6;
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p = (v * (255 - s)) >> 8;
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q = (v * (255 - ((s * remainder) >> 8))) >> 8;
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t = (v * (255 - ((s * (255 - remainder)) >> 8))) >> 8;
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switch (region) {
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case 0:
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r = v; g = t; b = p;
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break;
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case 1:
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r = q; g = v; b = p;
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break;
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case 2:
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r = p; g = v; b = t;
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break;
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case 3:
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r = p; g = q; b = v;
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break;
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case 4:
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r = t; g = p; b = v;
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break;
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default:
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r = v; g = p; b = q;
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break;
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}
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}
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void setRGB(const uint8_t r, const uint8_t g, const uint8_t b) {
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this->r = r;
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this->g = g;
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this->b = b;
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}
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void setOff() {
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this->r = 0;
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this->g = 0;
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this->b = 0;
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}
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/** add two colors */
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Color operator + (const Color o) const {
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return Color(r+o.r, g+o.g, b+o.g);
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}
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Color operator * (const float f) const {
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return Color(r*f, g*f, b*f);
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}
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};
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