Method screenshot_impl

libraries/lib-app-base/src/glfw-app.cpp:214–226

}

void polymer_app::screenshot_impl()
{
    int width, height;
    glfwGetWindowSize(window, &width, &height);
    int2 size(width, height);
    auto timestamp = make_timestamp();
    std::vector<uint8_t> screenShot(size.x * size.y * 4);
    glReadPixels(0, 0, size.x, size.y, GL_RGBA, GL_UNSIGNED_BYTE, screenShot.data());
    auto flipped = screenShot;
    for (int y = 0; y < size.y; ++y) memcpy(flipped.data() + y * size.x * 4, screenShot.data() + (size.y - y - 1)*size.x * 4, size.x * 4);
    stbi_write_png(std::string(screenshotPath + "-" + timestamp + ".png").c_str(), size.x, size.y, 4, flipped.data(), 4 * size.x);
    screenshotPath.clear();
}

void polymer_app::main_loop() 
{