1 files changed, 65 insertions, 0 deletions
diff --git a/src/main.cpp b/src/main.cpp
new file mode 100644
index 0000000..5876efc
--- /dev/null
+++ b/src/main.cpp
@@ -0,0 +1,65 @@
+#include <SFML/Graphics.hpp>
+
+int main() {
+    sf::Texture texture;
+    if(!texture.loadFromFile("flag.png"))
+        return 1;
+
+    texture.setSmooth(true);
+
+    sf::Vector2u window_size = texture.getSize();
+    sf::RenderWindow window(sf::VideoMode(window_size.x, window_size.y), "SFML works!", 0);
+    window.setVerticalSyncEnabled(true);
+    window.setFramerateLimit(24);
+
+    sf::Shader shader;
+    if(!shader.loadFromFile("flag.glsl", sf::Shader::Type::Fragment))
+        return 1;
+
+    shader.setUniform("texture", texture);
+
+    sf::Vertex vertex[4];
+    vertex[0] = sf::Vertex(sf::Vector2f(0.0f, 0.0f), sf::Color::White, sf::Vector2f(0.0f, 0.0f));
+    vertex[1] = sf::Vertex(sf::Vector2f(window_size.x, 0.0f), sf::Color::White, sf::Vector2f(1.0f, 0.0f));
+    vertex[2] = sf::Vertex(sf::Vector2f(window_size.x, window_size.y), sf::Color::White, sf::Vector2f(1.0f, 1.0f));
+    vertex[3] = sf::Vertex(sf::Vector2f(0.0f, window_size.y), sf::Color::White, sf::Vector2f(0.0f, 1.0f));
+
+    sf::Texture texture_output;
+    texture_output.create(texture.getSize().x, texture.getSize().y);
+
+    int flag_start_x = texture.getSize().x*0.2;
+    int flag_start_y = texture.getSize().y*0.2;
+    int flag_width = texture.getSize().x*0.6;
+    int flag_height = texture.getSize().y*0.6;
+
+    sf::Image output_image;
+    output_image.create(flag_width, flag_height, sf::Color::Transparent);
+    std::vector<sf::Image> frames;
+
+    sf::Clock timer;
+    while (window.isOpen()) {
+        sf::Event event;
+        while (window.pollEvent(event)) {
+            if (event.type == sf::Event::Closed)
+                window.close();
+        }
+
+        shader.setUniform("iTime", timer.getElapsedTime().asSeconds());
+        window.clear(sf::Color::Transparent);
+        window.draw(vertex, 4, sf::PrimitiveType::Quads, &shader);
+        window.display();
+
+        texture_output.update(window);
+        sf::Image image = texture_output.copyToImage();
+        output_image.copy(image, 0, 0, sf::IntRect(flag_start_x, flag_start_y, flag_width, flag_height), false);
+        frames.push_back(std::move(output_image));
+    }
+
+    system("rm -rf frames/*; mkdir frames");
+    for(size_t i = 0; i < frames.size(); ++i) {
+        frames[i].saveToFile("frames/" + std::to_string(i) + ".png");
+    }
+    system("ffmpeg -i \"frames/%d.png\" -framerate 24 -filter_complex \"fps=24,split=2[palette_in][gif];[palette_in]palettegen[palette_out];[gif]fifo[gif_fifo]; [gif_fifo][palette_out]paletteuse\" -y frames/output.gif");
+
+    return 0;
+}
+\ No newline at end of file