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#include "config.h"
#include <filesystem>
#include <iostream>
#include <random>
#include <stdexcept>
#include <vector>
#include <cmath>
#include <SFML/Graphics.hpp>
#include "brushes.h"
namespace fs = std::filesystem;
namespace {
bool seeded = false;
std::mt19937 engine;
std::uniform_int_distribution<sf::Uint32> color_dist;
std::uniform_real_distribution<float> white_chance(0, 1.0);
sf::Color random_color() {
if (!seeded) {
engine.seed(std::random_device{}());
seeded = true;
}
#define COLOR_MODE 2
#if (COLOR_MODE == 1)
sf::Color c = sf::Color(color_dist(engine));
c.a = 255;
c.g = 0;
return c;
#elif (COLOR_MODE == 2)
sf::Color c =
white_chance(engine) > 0.5 ? sf::Color::Yellow : sf::Color::Green;
float f = white_chance(engine);
c.r *= f;
c.g *= f;
c.b *= f;
c.a = 255;
return c;
#elif (COLOR_MODE == 3)
if (white_chance(engine) > 0.5) {
return sf::Color::White;
} else {
return sf::Color::Black;
}
#elif (COLOR_MODE == 4)
float f = white_chance(engine);
return sf::Color(255 * f, 255 * f, 255 * f, 255);
#endif
}
// Distort a black-white color. assume color_mode == 3 or 4.
sf::Color distort(const sf::Color& c, float p = 2) {
return sf::Color(255 * std::pow(c.r / 255.0, p),
255 * std::pow(c.g / 255.0, p),
255 * std::pow(c.b / 255.0, p), 255);
}
bool in_range(const sf::Vector2u& size, const sf::Vector2u& v) {
return v.x < size.x && v.y < size.y;
}
sf::Color avg_color(const sf::Image& im, unsigned i, unsigned j,
const std::vector<sf::Vector2i>& d,
bool black_border = false) {
sf::Vector2u p(i, j);
unsigned long ct = 0, r = 0, g = 0, b = 0, a = 0;
for (int k = 0; k < d.size(); ++k) {
sf::Vector2u q = p + sf::Vector2u(d[k]);
if (in_range(im.getSize(), q)) {
r += im.getPixel(q.x, q.y).r * (p == q ? 2 : 1);
g += im.getPixel(q.x, q.y).g * (p == q ? 2 : 1);
b += im.getPixel(q.x, q.y).b * (p == q ? 2 : 1);
a += im.getPixel(q.x, q.y).a;
ct += (p == q ? 2 : 1);
} else if (black_border) {
++ct;
}
}
r /= ct;
g /= ct;
b /= ct;
a /= ct;
return sf::Color(r, g, b, a);
}
sf::Color avg_card(const sf::Image& im, unsigned i, unsigned j) {
const std::vector<sf::Vector2i> d = {
{0, 0}, {1, 0}, {0, -1}, {-1, 0}, {0, 1}};
return avg_color(im, i, j, d);
}
void noise(sf::Image& im, int mode) {
sf::Image im2, im3;
if (mode == 1) {
im2.create(im.getSize().x * 2, im.getSize().y * 2);
for (unsigned i = 0; i < im.getSize().x; ++i) {
for (unsigned j = 0; j < im.getSize().y; ++j) {
sf::Color c = im.getPixel(i, j);
im2.setPixel(i * 2, j * 2, c);
im2.setPixel(i * 2 + 1, j * 2, c);
im2.setPixel(i * 2 + 1, j * 2 + 1, c);
im2.setPixel(i * 2, j * 2 + 1, c);
}
}
im3.create(im.getSize().x * 2, im.getSize().y * 2);
for (unsigned i = 0; i < im2.getSize().x; ++i) {
for (unsigned j = 0; j < im2.getSize().y; ++j) {
im3.setPixel(i, j, brushes::CardinalAverage(im2, i, j));
}
}
} else if (mode == 2) {
im3.create(im.getSize().x, im.getSize().y);
for (unsigned i = 0; i < im.getSize().x; ++i) {
for (unsigned j = 0; j < im.getSize().y; ++j) {
im3.setPixel(i, j, brushes::CardinalAverage(im, i, j));
}
}
} else if (mode == 3) {
im3.create(im.getSize().x * 2, im.getSize().y * 2);
for (unsigned i = 0; i < im.getSize().x; ++i) {
for (unsigned j = 0; j < im.getSize().y; ++j) {
sf::Color c = im.getPixel(i, j);
im3.setPixel(i * 2, j * 2, c);
im3.setPixel(i * 2 + 1, j * 2,
avg_color(im, i, j, {{0, 0}, {1, 0}}, true));
im3.setPixel(i * 2, j * 2 + 1,
avg_color(im, i, j, {{0, 0}, {0, 1}}, true));
im3.setPixel(i * 2 + 1, j * 2 + 1,
avg_color(im3, i * 2 + 1, j * 2 + 1,
{{-1, 0}, {1, 0}, {0, -1}, {0, 1},
{-1,-1},{-1,1},{1,-1},{1,1}}, true));
}
}
} else {
throw std::invalid_argument("Bad noise mode.");
}
im = im3;
}
sf::Color flip(const sf::Color& c) {
return sf::Color(255 - c.r, 255 - c.g, 255 - c.b, c.a);
}
} // namespace
int main(int argc, char* argv[]) {
sf::RenderWindow window(sf::VideoMode(640, 400), "Noise");
sf::Font font;
if (!font.loadFromFile((fs::path(argv[0]).parent_path() / "OpenSans.ttf").string())) {
std::cerr << "FATAL: Failed to load font OpenSans.ttf." << std::endl;
return -1;
}
#ifdef HAVE_FONT_SMOOTHING
font.setSmooth(true);
#endif
sf::Text counter("Iteration 0 Blur 0 Brightness 0", font);
counter.setPosition(5, 5);
sf::Text help(
"1 - Zoom\tQ - Quit\n"
"2 - Average blur\n"
"3 - Quadratic darken\n"
"4 - Quadratic brighten\n"
"F - Flip colors\n"
"R - randomize pixels\n"
"0 - Reset texture",
font, 15);
help.setPosition(5, window.getSize().y - help.getLocalBounds().height - 10);
int icount = 0, bcount = 0, dcount = 0;
sf::Texture text;
sf::Image im;
sf::RectangleShape rect(sf::Vector2f(400, 200));
rect.setPosition(100, 50);
const sf::Vector2u initSize(32, 16);
im.create(initSize.x, initSize.y, sf::Color::White);
for (unsigned i = 0; i < im.getSize().x; ++i) {
for (unsigned j = 0; j < im.getSize().y; ++j) {
im.setPixel(i, j, random_color());
}
}
text.loadFromImage(im);
rect.setTexture(&text);
while (window.isOpen()) {
sf::Event event;
while (window.pollEvent(event)) {
if (event.type == sf::Event::Closed) {
window.close();
} else if (event.type == sf::Event::KeyReleased) {
if (event.key.code == sf::Keyboard::Num1 && im.getSize().x < 2 << 8) {
++icount;
noise(im, 1);
} else if (event.key.code == sf::Keyboard::Num2) {
++bcount;
if (event.key.shift) {
} else {
noise(im, 2);
}
} else if (event.key.code == sf::Keyboard::Num3) {
--dcount;
for (unsigned i = 0; i < im.getSize().x; ++i) {
for (unsigned j = 0; j < im.getSize().y; ++j) {
im.setPixel(i, j, distort(im.getPixel(i, j), 1.5));
}
}
} else if (event.key.code == sf::Keyboard::Num4) {
++dcount;
for (unsigned i = 0; i < im.getSize().x; ++i) {
for (unsigned j = 0; j < im.getSize().y; ++j) {
im.setPixel(i, j, distort(im.getPixel(i, j), 2.0 / 3));
}
}
} else if (event.key.code == sf::Keyboard::F) {
for (unsigned i = 0; i < im.getSize().x; ++i) {
for (unsigned j = 0; j < im.getSize().y; ++j) {
im.setPixel(i, j, flip(im.getPixel(i, j)));
}
}
} else if (event.key.code == sf::Keyboard::Num0) {
bcount = icount = 0, dcount = 0;
im.create(initSize.x, initSize.y, sf::Color::White);
for (unsigned i = 0; i < im.getSize().x; ++i) {
for (unsigned j = 0; j < im.getSize().y; ++j) {
im.setPixel(i, j, random_color());
}
}
} else if (event.key.code == sf::Keyboard::R) {
bcount = 0, dcount = 0;
for (unsigned i = 0; i < im.getSize().x; ++i) {
for (unsigned j = 0; j < im.getSize().y; ++j) {
im.setPixel(i, j, random_color());
}
}
} else {
continue;
}
counter.setString("Iteration " + std::to_string(icount) + " Blur " +
std::to_string(bcount) + " Brightness " +
std::to_string(dcount));
text.loadFromImage(im);
rect.setTexture(&text, true);
}
}
window.clear();
window.draw(help);
window.draw(counter);
window.draw(rect);
window.display();
sf::sleep(sf::milliseconds(1));
}
return 0;
}
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