bool operator<(const color_range& b) const
{
if(mid_ != b.mid()) return(mid_ < b.mid());
if(max_ != b.max()) return(max_ < b.max());
if(min_ != b.min()) return(min_ < b.min());
return(rep_ < b.rep());
}
color_range_map recolor_range(const color_range& new_range, const std::vector<color_t>& old_rgb)
{
color_range_map map_rgb;
const uint16_t new_red = new_range.mid().r;
const uint16_t new_green = new_range.mid().g;
const uint16_t new_blue = new_range.mid().b;
const uint16_t max_red = new_range.max().r;
const uint16_t max_green = new_range.max().g;
const uint16_t max_blue = new_range.max().b;
const uint16_t min_red = new_range.min().r;
const uint16_t min_green = new_range.min().g;
const uint16_t min_blue = new_range.min().b;
// Map first color in vector to exact new color
const color_t temp_rgb = old_rgb.empty() ? color_t() : old_rgb[0];
const uint16_t reference_avg = (temp_rgb.r + temp_rgb.g + temp_rgb.b) / 3;
for(const auto& old_c : old_rgb) {
const uint16_t old_avg = (old_c.r + old_c.g + old_c.b) / 3;
// Calculate new color
uint32_t new_r = 0, new_g = 0, new_b = 0;
if(reference_avg && old_avg <= reference_avg) {
float old_ratio = static_cast<float>(old_avg) / reference_avg;
new_r = static_cast<uint32_t>(old_ratio * new_red + (1 - old_ratio) * min_red);
new_g = static_cast<uint32_t>(old_ratio * new_green + (1 - old_ratio) * min_green);
new_b = static_cast<uint32_t>(old_ratio * new_blue + (1 - old_ratio) * min_blue);
} else if(reference_avg != 255) {
float old_ratio = (255.0f - static_cast<float>(old_avg)) / (255.0f - reference_avg);
new_r = static_cast<uint32_t>(old_ratio * new_red + (1 - old_ratio) * max_red);
new_g = static_cast<uint32_t>(old_ratio * new_green + (1 - old_ratio) * max_green);
new_b = static_cast<uint32_t>(old_ratio * new_blue + (1 - old_ratio) * max_blue);
} else {
// Should never get here.
// Would imply old_avg > reference_avg = 255
assert(false);
}
new_r = std::min<uint32_t>(new_r, 255);
new_g = std::min<uint32_t>(new_g, 255);
new_b = std::min<uint32_t>(new_b, 255);
map_rgb[old_c] = {static_cast<uint8_t>(new_r), static_cast<uint8_t>(new_g), static_cast<uint8_t>(new_b)};
}
return map_rgb;
}
bool operator==(const color_range& b) const
{
return(mid_ == b.mid() && max_ == b.max() && min_ == b.min() && rep_ == b.rep());
}