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Identicon.cpp
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Identicon.cpp
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#include "include/Identicon.h"
#include "include/Image.h"
namespace Identicon {
void Identicon::hash_input() {
std::size_t hash = std::hash<std::string>{}(this->input);
std::vector<uint8_t> _hex(sizeof(hash));
std::memcpy(_hex.data(), &hash, sizeof(hash));
// sizeof(hash) => 8, we need to make it longer for the grid
_hex.insert(_hex.end(), _hex.begin(), _hex.end());
this->hex = _hex;
}
void Identicon::create_image(std::string input) {
Identicon* identicon = new Identicon(input);
identicon->hash_input();
identicon->pick_color();
identicon->build_grid();
identicon->generate_image();
std::string input_with_ext = input + ".bmp";
printf("Identicon was generated. File: %s\n", input_with_ext.c_str());
}
void Identicon::pick_color() {
for (int i = 0; i < 3; i++) {
this->color[i] = this->hex[i];
}
}
void Identicon::build_grid() {
for (int i = 0; i < this->hex.size(); i++) {
if (i > 0 && i % 3 == 0) {
std::vector<uint8_t> row;
int chunk_size = 3;
while (chunk_size--) {
row.push_back(this->hex[i - chunk_size]);
}
row.push_back(row[1]);
row.push_back(row[0]);
this->grid.push_back(row);
}
}
}
void Identicon::generate_image() {
std::vector<int> rgb;
for (int i = 0; i < this->grid.size(); i++) {
int pixel_size_height = 50;
while (pixel_size_height--) {
for (int j = 0; j < this->grid[0].size(); j++) {
int pixel_size_width = 50;
if (this->grid[i][j] % 2 == 0) {
while (pixel_size_width--) {
rgb.push_back(255);
rgb.push_back(255);
rgb.push_back(255);
}
} else {
while (pixel_size_width--) {
rgb.push_back(this->color[0]);
rgb.push_back(this->color[1]);
rgb.push_back(this->color[2]);
}
}
}
}
}
std::string file_name = this->input.append(".bmp");
Image::write(file_name, &rgb[0], 250, 250);
}
}