kc3-lang/kc3/libc3_window/cairo/demo/toasters.c

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• Hash : f23d563b
  Author : Thomas de Grivel
  Date : 2024-03-24T14:53:08
  

  move libc3/window to libc3_window, shorter build messages and build log for libc3 (see configure)
  

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• libc3_window/cairo/demo/toasters.c

• /* c3
   * Copyright 2022-2024 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 <math.h>
  #include <libc3/c3.h>
  #include "../cairo_sprite.h"
  #include "toasters.h"
  
  static const f64 g_speed_x =  80.0;
  static const f64 g_speed_y = -40.0;
  s_cairo_sprite   g_sprite_toast = {0};
  s_cairo_sprite   g_sprite_toaster = {0};
  
  static bool toasters_render_toasters (s_list **toasters,
                                        s_window_cairo *window,
                                        cairo_t *cr,
                                        s_sequence *seq);
  static bool toasters_render_toasts (s_list **toasts,
                                      s_window_cairo *window,
                                      cairo_t *cr,
                                      s_sequence *seq);
  
  static s_tag * toast_init (s_tag *toast, f64 x, f64 y)
  {
    tag_init_map(toast, 2);
    tag_init_sym(toast->data.map.key   + 0, sym_1("x"));
    tag_init_f64(toast->data.map.value + 0, x);
    tag_init_sym(toast->data.map.key   + 1, sym_1("y"));
    tag_init_f64(toast->data.map.value + 1, y);
    return toast;
  }
  
  static void toast_render (s_tag *toast, s_window_cairo *window,
                            cairo_t *cr, s_sequence *seq)
  {
    cairo_matrix_t matrix;
    f64 *x;
    f64 *y;
    if (toast->type == TAG_MAP) {
      x = &toast->data.map.value[0].data.f64;
      y = &toast->data.map.value[1].data.f64;
      *x -= seq->dt * g_speed_x;
      *y -= seq->dt * g_speed_y;
      if (*x < -100 || *y > window->h) {
        tag_clean(toast);
        toast->type = TAG_VOID;
        return;
      }
      cairo_get_matrix(cr, &matrix);
      cairo_translate(cr, *x, *y);
      cairo_sprite_blit(&g_sprite_toast, 0, cr, 0, 0);
      cairo_set_matrix(cr, &matrix);
    }
  }
  
  static s_tag * toaster_init (s_tag *toaster, f64 y)
  {
    tag_init_map(toaster, 2);
    tag_init_sym(toaster->data.map.key + 0, sym_1("x"));
    tag_init_f64(toaster->data.map.value + 0, -150);
    tag_init_sym(toaster->data.map.key + 1, sym_1("y"));
    tag_init_f64(toaster->data.map.value + 1, y);
    return toaster;
  }
  
  static void toaster_render (s_tag *toaster, s_window_cairo *window,
                              cairo_t *cr, s_sequence *seq)
  {
    cairo_matrix_t matrix;
    f64 *x;
    f64 *y;
    if (toaster->type == TAG_MAP) {
      x = &toaster->data.map.value[0].data.f64;
      y = &toaster->data.map.value[1].data.f64;
      *x += seq->dt * g_speed_x;
      *y += seq->dt * g_speed_y;
      if (*x > window->w || *y < -200) {
        tag_clean(toaster);
        toaster->type = TAG_VOID;
        return;
      }
      cairo_get_matrix(cr, &matrix);
      cairo_translate(cr, *x, *y);
      cairo_sprite_blit(&g_sprite_toaster,
                        fmod(seq->t * g_sprite_toaster.frame_count,
                             g_sprite_toaster.frame_count),
                        cr, 0, 0);
      cairo_set_matrix(cr, &matrix);
    }
  }
  
  bool toasters_load (s_sequence *seq)
  {
    s_map *map;
    tag_map(&seq->tag, 2);
    map = &seq->tag.data.map;
    tag_init_sym( map->key + 0, sym_1("toasters"));
    tag_init_list(map->value + 0, NULL);
    tag_init_sym( map->key + 1, sym_1("toasts"));
    tag_init_list(map->value + 1, NULL);
    return true;
  }
  
  bool toasters_render (s_sequence *seq)
  {
    cairo_t *cr;
    s_list **toasters;
    s_list **toasts;
    s_window_cairo *window;
    window = seq->window;
    cr = window->cr;
    cairo_set_source_rgb(cr, 0.7, 0.95, 1.0);
    cairo_rectangle(cr, 0, 0, window->w, window->h);
    cairo_fill(cr);
    /* io_inspect(&seq->tag); */
    if (seq->tag.type == TAG_MAP) {
      toasters = &seq->tag.data.map.value[0].data.list;
      toasts   = &seq->tag.data.map.value[1].data.list;
      toasters_render_toasts(toasts, window, cr, seq);
      toasters_render_toasters(toasters, window, cr, seq);
    }
    return true;
  }
  
  bool toasters_render_toasts (s_list **toasts, s_window_cairo *window,
                               cairo_t *cr, s_sequence *seq)
  {
    s_list *i;
    s_list *j;
    s_map *map;
    s_list **t = NULL;
    f64 x;
    f64 y;
    assert(toasts);
    assert(window);
    assert(cr);
    assert(seq);
    y = window->w * g_speed_y / g_speed_x - 210;
    if (*toasts && (*toasts)->tag.type == TAG_MAP) {
      t = &(*toasts)->tag.data.map.value[0].data.list;
      y =  (*toasts)->tag.data.map.value[1].data.f64;
    }
    while (y < window->h - 100) {
      y += 170.0;
      *toasts = list_new_map(2, *toasts);
      map = &(*toasts)->tag.data.map;
      tag_init_sym(map->key  + 0, sym_1("toasts"));
      tag_init_list(map->value + 0, NULL);
      tag_init_sym(map->key  + 1, sym_1("y"));
      tag_init_f64(map->value  + 1, y);
    }
    i = *toasts;
    while (i) {
      if (i->tag.type == TAG_MAP) {
        t = &i->tag.data.map.value[0].data.list;
        y =  i->tag.data.map.value[1].data.f64;
        x = 0.0;
        if (*t && (*t)->tag.type == TAG_MAP)
          x = (*t)->tag.data.map.value[0].data.f64;
        if (x < window->w - 160.0) {
          *t = list_new(*t);
          toast_init(&(*t)->tag, window->w, y);
        }
        list_remove_void(t);
        j = *t;
        while (j) {
          toast_render(&j->tag, window, cr, seq);
          j = list_next(j);
        }
      }
      i = list_next(i);
    }
    return true;
  }
  
  bool toasters_render_toasters (s_list **toasters,
                                 s_window_cairo *window, cairo_t *cr,
                                 s_sequence *seq)
  {
    s_list *i;
    s_list *j;
    s_map *map;
    s_list **t = NULL;
    f64 x;
    f64 y;
    assert(toasters);
    assert(window);
    assert(cr);
    assert(seq);
    /* io_inspect_list((const s_list **) toasters); */
    y = -100.0;
    if (*toasters && (*toasters)->tag.type == TAG_MAP) {
      t = &(*toasters)->tag.data.map.value[0].data.list;
      y =  (*toasters)->tag.data.map.value[1].data.f64;
    }
    while (y < window->h - window->w * g_speed_y / g_speed_x) {
      y += 170.0;
      *toasters = list_new_map(2, *toasters);
      map = &(*toasters)->tag.data.map;
      tag_init_sym(map->key  + 0, sym_1("toasters"));
      tag_init_list(map->value + 0, NULL);
      tag_init_sym(map->key  + 1, sym_1("y"));
      tag_init_f64(map->value  + 1, y);
    }
    i = *toasters;
    while (i) {
      if (i->tag.type == TAG_MAP) {
        t = &i->tag.data.map.value[0].data.list;
        y =  i->tag.data.map.value[1].data.f64;
        x = 1000.0;
        if (*t && (*t)->tag.type == TAG_MAP)
          x = (*t)->tag.data.map.value[0].data.f64;
        if (x > 60.0) {
          *t = list_new(*t);
          toaster_init(&(*t)->tag, y);
        }
        list_remove_void(t);
        j = *t;
        while (j) {
          toaster_render(&j->tag, window, cr, seq);
          j = list_next(j);
        }
      }
      i = list_next(i);
    }
    return true;
  }
  
  bool toasters_unload (s_sequence *seq)
  {
    (void) seq;
    return true;
  }
  

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