animation gif player 256 colors version

readme.md

imagemagick が入ってれば多分使える ubuntu だったら libmagick++ みたいなやつ？

コンパイル

g++ `Magick++-config --cxxflags --cppflags` -o agif agif.cpp -lncurses `Magick++-config --ldflags --libs`

使い方

./agif [-w] filename

環境変数 TERM を screen-256color か xterm-256color にセットする必要があるかも

agif.cpp

#include <Magick++.h>
#include <ncurses.h>
#include <unistd.h>
#include <vector>
#include <algorithm>

int main(int argc, char *argv[])
{

  bool full = false;

  int result;
  while ((result = getopt(argc, argv, "w")) != -1) {
    switch (result) {
    case 'w':
      full = true;
      break;
    }
  }

  if (optind >= argc) {
    fprintf(stderr, "usage: ./agif256 [-w] filename\n");
    return 1;
  }

  std::vector<Magick::Image> images;
  Magick::readImages(&images, argv[optind]);
  
  // init ncurses
  WINDOW *scr = initscr();
  nodelay(scr, TRUE); // non-blocking getch
  start_color();
  for (short i = 1; i < COLORS; i++) init_pair(i, i, i);

  int lines, columns;
  getmaxyx(scr, lines, columns);

  // scale images
  Magick::Geometry scale(columns / 2, lines, 0, 0);
  scale.aspect(full);
  for (std::vector<Magick::Image>::iterator it = images.begin(); it != images.end(); it++)
    it->resize(scale);

  // fill terminal
  for (int i = 0; i < lines; i++) {
    for (int j = 0; j < columns; j++) {
      attrset(COLOR_PAIR(232));
      move(i, j);
      printw(" ");
    }
  }

  // play animation
  int cnt = 0;
  while (true) {
    for (int i = 0; i < images[0].rows(); i++) {
      for (int j = 0; j < images[0].columns(); j++) {
        Magick::ColorRGB c = images[cnt].pixelColor(j, i);
        short r = (short)std::min(c.red() * 6, 5.0)
          , g = (short)std::min(c.green() * 6, 5.0)
          , b = (short)std::min(c.blue() * 6, 5.0);
        attrset(COLOR_PAIR(16 + r * 36 + g * 6 + b));
        move(lines / 2 - images[0].rows() / 2 + i, columns / 2 - images[0].columns() + j * 2);
        printw("  ");
      }
    }
    if (getch() != ERR) break;
    refresh();
    usleep(images[cnt].animationDelay() * 10000);
    cnt = (cnt + 1) % images.size();
  }

  endwin();
  
  return 0;
}