107 lines
2.9 KiB
C++
107 lines
2.9 KiB
C++
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#include "common/color.h"
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#include <algorithm>
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#include <cassert>
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// Access operators ////////////////////////////////////////////////////////////
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float &Color::operator[](int channel) {
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assert(0 <= channel && channel < 3);
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switch (channel) {
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case Channel::R:
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return this->r;
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case Channel::G:
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return this->g;
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case Channel::B:
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return this->b;
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default: // This must never happen
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return this->r;
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}
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}
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float const &Color::operator[](int channel) const {
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assert(0 <= channel && channel < 3);
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switch (channel) {
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case Channel::R:
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return this->r;
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case Channel::G:
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return this->g;
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case Channel::B:
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return this->b;
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default: // This must never happen
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return this->r;
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}
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}
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// Comparison operators ////////////////////////////////////////////////////////
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bool operator==(Color const &left, Color const &right) {
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return (left.r == right.r && left.g == right.g && left.b == right.b);
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}
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bool operator!=(Color const &left, Color const &right) { return !(left == right); }
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// Arithmetic operators ////////////////////////////////////////////////////////
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Color operator+(Color const &left, Color const &right) {
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return Color(left.r + right.r, left.g + right.g, left.b + right.b);
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}
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Color operator-(Color const &right) { return Color(-right.r, -right.g, -right.b); }
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Color operator-(Color const &left, Color const &right) {
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return Color(left.r - right.r, left.g - right.g, left.b - right.b);
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}
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Color operator*(Color const &left, float right) { return Color(left.r * right, left.g * right, left.b * right); }
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Color operator*(float left, Color const &right) { return Color(left * right.r, left * right.g, left * right.b); }
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Color operator*(Color const &left, Color const &right) {
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return Color(left.r * right.r, left.g * right.g, left.b * right.b);
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}
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Color operator/(Color const &left, float right) { return Color(left.r / right, left.g / right, left.b / right); }
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Color operator/(Color const &left, Color const &right) {
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return Color(left.r / right.r, left.g / right.g, left.b / right.b);
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}
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// Assignment operators ////////////////////////////////////////////////////////
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Color &operator+=(Color &left, Color const &right) {
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left.r += right.r;
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left.g += right.g;
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left.b += right.b;
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return left;
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}
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Color &operator-=(Color &left, Color const &right) {
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left.r -= right.r;
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left.g -= right.g;
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left.b -= right.b;
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return left;
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}
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Color &operator*=(Color &left, float right) {
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left.r *= right;
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left.g *= right;
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left.b *= right;
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return left;
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}
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Color &operator/=(Color &left, float right) {
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left.r /= right;
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left.g /= right;
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left.b /= right;
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return left;
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}
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// Useful functions ////////////////////////////////////////////////////////////
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Color clamped(Color const &c) {
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return Color(std::max(0.0f, std::min(c.r, 1.0f)), std::max(0.0f, std::min(c.g, 1.0f)),
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std::max(0.0f, std::min(c.b, 1.0f)));
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}
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void clamp(Color *c) { *c = clamped(*c); }
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