Setup project structure for unified Makefile
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src/main.cpp
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200
src/main.cpp
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// C++
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#include <iostream>
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#include <cstdlib>
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#include <string>
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#include <stdexcept>
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#include <fstream>
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#include <algorithm>
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// POSIX
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#include <getopt.h>
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#include <unistd.h>
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// libraries
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#include <cairo/cairo.h>
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#include <libscgui.hpp>
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#include <libscerror.hpp>
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#include <libscscreensaver.hpp>
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#include <libscstring.hpp>
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#include <libscnumerics.hpp>
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#include <sc/plugin.hpp>
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const int WIDTH {1600};
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const int HEIGHT {900};
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sc::gui::Window* main_window {nullptr};
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ScreensaverPlugin* main_saver {nullptr};
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std::unique_ptr<sc::gui::Image> main_image {nullptr};
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std::unique_ptr<cairo_t, void(*)(cairo_t*)> main_context {nullptr, cairo_destroy};
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std::unique_ptr<cairo_surface_t, void(*)(cairo_surface_t*)> main_surface {nullptr, cairo_surface_destroy};
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void print_help() {
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std::cout << "usage: screensaver [-h|-l|--version][-r][-w]\n";
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std::cout << " -h, --help show this help text and exit\n";
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std::cout << " -l, --list show available screensaver modules and exit\n";
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std::cout << " -r, --random choose random module from available ones\n";
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std::cout << " -w, --window show in resizable window instead of fullscreen\n";
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std::cout << " --version show version number and exit\n";
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}
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void print_version() {
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std::cout << "screensaver version 1.0\n";
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}
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void list_plugins() {
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for (const std::string& name : sc::plugin<ScreensaverPlugin>::names()) {
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std::cout << name << '\n';
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}
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}
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void create_image(int w, int h) {
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// create an SDL drawing surface and connect it to cairo
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main_image.reset(new sc::gui::Image {w, h});
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SDL_Surface* s = main_image->surface();
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cairo_surface_t* cs {cairo_image_surface_create_for_data(static_cast<unsigned char*>(s->pixels),
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CAIRO_FORMAT_RGB24, s->w, s->h, s->pitch)};
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main_surface.reset(cs);
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cairo_t* cr {cairo_create(cs)};
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main_context.reset(cr);
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}
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void draw() {
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main_saver->update();
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sc::gui::ImageLock lock {*main_image};
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main_saver->render();
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main_window->dirty(true);
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main_window->show_image(*main_image);
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}
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bool handle_window_resize(const SDL_Event& event, bool quit) {
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if (event.window.data1 != main_image->width() || event.window.data2 != main_image->height()) {
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std::cerr << "screensaver: window resized to " << event.window.data1 << "×" << event.window.data2 << " pixels\n";
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create_image(event.window.data1, event.window.data2);
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cairo_rectangle_t r {0, 0, static_cast<double>(event.window.data1), static_cast<double>(event.window.data2)};
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if (main_saver) {
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main_saver->setup(main_context.get(), r);
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}
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}
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return quit;
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}
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int main(int argc, char* argv[]) {
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try {
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// gather plugins
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#if DEBUG
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std::string plugin_dir {sc::dirname(sc::tool_path(argv[0])) + "/plugins"};
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#else
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std::string plugin_dir {"/usr/local/share/screensaver/plugins"};
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#endif
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sc::plugin<ScreensaverPlugin>::scan_plugins(plugin_dir, "saver");
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std::string saver_name;
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bool random_saver {false};
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bool small_window {false};
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int opt_char, opt_val;
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struct option long_options[] = {
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{"help", no_argument, nullptr, 'h'},
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{"list", no_argument, nullptr, 'l'},
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{"random", no_argument, nullptr, 'r'},
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{"window", no_argument, nullptr, 'w'},
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{"version", no_argument, &opt_val, 1},
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{nullptr, 0, nullptr, 0}
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};
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while ((opt_char = getopt_long(argc, argv, "hlrw", long_options, nullptr)) != -1) {
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std::string arg {optarg ? optarg : ""};
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switch (opt_char) {
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case 0: {
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// handle long-only options here
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switch (opt_val) {
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case 1:
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print_version();
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return EXIT_SUCCESS;
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}
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break;
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}
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case 'h':
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print_help();
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return EXIT_SUCCESS;
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case 'l':
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list_plugins();
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return EXIT_SUCCESS;
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case 'r':
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random_saver = true;
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break;
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case 'w':
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small_window = true;
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break;
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case '?':
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throw std::runtime_error("unrecognized option");
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}
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}
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std::vector<std::string> names {sc::plugin<ScreensaverPlugin>::names()};
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if (optind == argc) {
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// here when no file args
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if (random_saver) {
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saver_name = sc::random::choice(names);
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} else {
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saver_name = "Default";
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}
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}
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for (int i = optind; i < argc; ++i) {
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try {
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// process file argv[i]
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saver_name = argv[i];
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if (random_saver) {
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std::cerr << "screensaver: warning: -r option overridden by file arg\n";
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}
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auto it = std::find(names.begin(), names.end(), saver_name);
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if (it == names.end()) {
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saver_name = "";
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throw std::out_of_range(saver_name);
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}
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break; // only first one used
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} catch (const std::runtime_error& ex) {
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std::cerr << "screensaver: " << ex.what() << '\n';
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} catch (const std::out_of_range& ex) {
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std::cerr << "screensaver: no such screensaver module: " << argv[i] << '\n';
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}
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}
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// RAII instances
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sc::gui::SDLWrapper sdl2;
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sc::gui::SDLImageWrapper sdl_image;
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// main window
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Uint32 flags {small_window ? SDL_WINDOW_RESIZABLE : SDL_WINDOW_FULLSCREEN_DESKTOP};
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sc::gui::Window& window {sc::gui::Window::new_window("Living Art", flags)};
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main_window = &window;
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window.add_event_handler(handle_window_resize, SDL_WINDOWEVENT_RESIZED);
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window.add_event_handler(handle_window_resize, SDL_WINDOWEVENT_SIZE_CHANGED);
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SDL_ShowCursor(SDL_DISABLE);
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// setup sdl surface and connect to cairo
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create_image(WIDTH, HEIGHT);
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// setup screen saver module
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if (saver_name.size() == 0) {
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saver_name = "Default";
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std::cerr << "screensaver: using standard 'Default' module\n";
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}
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std::unique_ptr<ScreensaverPlugin> saver {sc::plugin<ScreensaverPlugin>::get(saver_name)()};
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main_saver = saver.get();
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main_saver->setup(main_context.get(), {0, 0, WIDTH, HEIGHT});
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std::string config_path {plugin_dir + "/" + saver_name + ".json"};
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std::ifstream config_file {config_path};
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if (config_file) {
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std::cerr << "screensaver: reading config file " << config_path << '\n';
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nlohmann::json j;
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config_file >> j;
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main_saver->config(std::move(j));
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}
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sc::gui::app().fps(main_saver->fps());
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sc::gui::app().add_run_loop_action(draw);
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sc::gui::app().run();
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} catch (const std::exception& ex) {
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std::cerr << "screensaver: " << ex.what() << '\n';
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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127
src/precomp.hpp
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127
src/precomp.hpp
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// C++98 (first official C++ standard)
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#include <algorithm>
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#include <bitset>
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#include <cassert>
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#include <cctype>
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#include <cerrno>
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#include <climits>
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#include <cmath>
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#include <complex>
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#include <cstdarg>
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#include <cstddef>
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#include <cstdio>
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#include <cstdlib>
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#include <cstring>
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#include <ctime>
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#include <cwchar>
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#include <cwctype>
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#include <deque>
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#include <exception>
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#include <fstream>
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#include <functional>
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#include <iomanip>
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#include <ios>
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#include <iosfwd>
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#include <iostream>
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#include <istream>
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#include <iterator>
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#include <limits>
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#include <list>
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#include <locale>
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#include <map>
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#include <memory>
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#include <new>
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#include <numeric>
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#include <ostream>
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#include <queue>
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#include <set>
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#include <sstream>
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#include <stack>
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#include <stdexcept>
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#include <streambuf>
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#include <string>
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#include <typeinfo>
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#include <utility>
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#include <valarray>
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#include <vector>
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#if (__cplusplus >= 201103L) // C++11
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#include <array>
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#include <atomic>
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#include <cfenv>
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#include <chrono>
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#include <cinttypes>
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#include <codecvt> // deprecated in C++17, removed in C++26
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#include <condition_variable>
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#include <cstdint>
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#include <cuchar>
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#include <forward_list>
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#include <future>
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#include <initializer_list>
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#include <mutex>
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#include <random>
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#include <ratio>
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#include <regex>
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#include <scoped_allocator>
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#include <system_error>
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#include <thread>
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#include <tuple>
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#include <type_traits>
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#include <typeindex>
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#include <unordered_map>
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#include <unordered_set>
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#endif // C++11
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#if (__cplusplus >= 201402L) // C++14
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#include <shared_mutex>
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#endif // C++14
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#if (__cplusplus >= 201703L) // C++17
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#include <any>
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#include <charconv>
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#include <execution>
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#include <filesystem>
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#include <memory_resource>
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#include <optional>
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#include <string_view>
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#include <variant>
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#endif // C++17
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#if (__cplusplus >= 202002L) // C++20
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#include <barrier>
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#include <bit>
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#include <compare>
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#include <concepts>
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#include <coroutine>
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#include <format>
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#include <latch>
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#include <numbers>
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#include <ranges>
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#include <semaphore>
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#include <source_location>
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#include <span>
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#include <stop_token>
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#include <syncstream>
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#include <version>
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#endif // C++20
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#if (__cplusplus >= 202302L) // C++23
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#include <expected>
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#include <flat_map>
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#include <flat_set>
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#include <generator>
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#include <mdspan>
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#include <print>
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#include <spanstream>
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#include <stacktrace>
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#include <stdfloat>
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#endif // C++23
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#if (__cplusplus > 202302L) // C++26
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#include <debugging>
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#include <hazard_pointer>
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#include <inplace_vector>
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#include <linalg>
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#include <rcu>
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#include <text_encoding>
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#endif // C++26
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19
src/version.cpp
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19
src/version.cpp
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#include "version.hpp"
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#include "version.inc"
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#include "commit.inc"
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#include <sstream>
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std::string {PROJECT}_version() {
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std::ostringstream oss;
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oss << "{PROJECT} version " << version;
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#ifdef DEBUG
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oss << " DEBUG";
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#endif
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oss << '\n';
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if (commit[0] != '\0') {
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oss << "build " << commit << ", ";
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}
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oss << __DATE__ << ", " << __TIME__ << '\n';
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oss << "(c) Bob Polis, all rights reserved";
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return oss.str();
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}
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8
src/version.hpp
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8
src/version.hpp
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#ifndef VERSION_H_
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#define VERSION_H_
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#include <string>
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std::string {PROJECT}_version();
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#endif // VERSION_H_
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