kc3-lang/kc3/libc3/window/window.c

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• Hash : 0ece14d4
  Author : Thomas de Grivel
  Date : 2023-11-12T16:15:44
  

  wip libc3 window cairo demo

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• libc3/window/window.c

• /* c3
   * Copyright 2022,2023 kmx.io <contact@kmx.io>
   *
   * Permission is hereby granted to use this software granted the above
   * copyright notice and this permission paragraph are included in all
   * copies and substantial portions of this software.
   *
   * THIS SOFTWARE IS PROVIDED "AS-IS" WITHOUT ANY GUARANTEE OF
   * PURPOSE AND PERFORMANCE. IN NO EVENT WHATSOEVER SHALL THE
   * AUTHOR BE CONSIDERED LIABLE FOR THE USE AND PERFORMANCE OF
   * THIS SOFTWARE.
   */
  #include <assert.h>
  #include <err.h>
  #include <libc3/c3.h>
  #include "window.h"
  
  bool window_animate (s_window *window)
  {
    s_time clock_monotonic;
    s_time delta;
    s_sequence *seq;
    f64 t;
    if (clock_gettime(CLOCK_MONOTONIC, &clock_monotonic)) {
      warn("window_animate");
      return false;
    }
    if (window->sequence_pos >= window->sequence_count) {
      warnx("window_animate: window->sequence_pos >="
            " window->sequence_count");
      return false;
    }
    seq = window->sequence + window->sequence_pos;
    time_sub(&clock_monotonic, &seq->t0, &delta);
    time_to_f64(&delta, &t);
    seq->t = t;
    /* printf("window_animate: %f\n", t); */
    if (t > seq->duration &&
        ! window_set_sequence_pos(window, (window->sequence_pos + 1) %
                                  window->sequence_count))
      return false;
    return true;
  }
  
  bool window_set_sequence_pos (s_window *window, uw sequence_pos)
  {
    s_sequence *seq;
    assert(window);
    printf("window_set_sequence_pos %lu\n", sequence_pos);
    if (sequence_pos >= window->sequence_count)
      return false;
    seq = window->sequence + sequence_pos;
    seq->t = 0.0;
    if (clock_gettime(CLOCK_MONOTONIC, &seq->t0)) {
      warn("window_set_sequence_pos");
      return false;
    }
    window->sequence_pos = sequence_pos;
    printf("%s\n", seq->title);
    return true;
  }
  

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