src/lib/16_sprit.c

   1 #include "src/lib/16_sprit.h"
   2
   3 char* get_curr_anim_name(struct sprite *spri)
   4 {
   5         // Retrive animation name list
   6         struct vrs_header huge *vrs = spri->spritesheet->vrs_hdr;
   7         uint32_t huge *anim_names_offsets =     (uint32_t huge *)
   8                                                 ((byte huge *)vrs +
   9                                                  vrs->offset_table[VRS_HEADER_OFFSET_ANIMATION_NAME_LIST]);
  10
  11         return (char *)(vrs + anim_names_offsets[spri->curr_anim]);
  12 }
  13
  14 void init_anim(struct sprite *spri, int anim_index)
  15 {
  16         struct vrs_header huge *vrs = spri->spritesheet->vrs_hdr;
  17         uint32_t huge *anim_lists_offsets =     (uint32_t huge *)
  18                                                 ((byte huge *)vrs +
  19                                                  vrs->offset_table[VRS_HEADER_OFFSET_ANIMATION_LIST]);
  20         struct vrs_animation_list_entry_t huge *anim_list =     (struct vrs_animation_list_entry_t huge *)
  21                                                                 ((byte huge *)vrs +
  22                                                                  anim_lists_offsets[anim_index]);
  23
  24         // Upon new animation, start from the first sprite in it
  25         spri->curr_anim = anim_index;
  26         spri->curr_anim_spri = 0;
  27         spri->curr_spri_id = anim_list[0].sprite_id;
  28         spri->delay = anim_list[0].delay;
  29
  30         spri->curr_anim_list = anim_list;
  31 }
  32
  33
  34 int set_anim_by_id(struct sprite *spri, int anim_id)
  35 {
  36         int new_anim_index = 0;
  37         int iter_id;
  38         struct vrs_header huge *vrs = spri->spritesheet->vrs_hdr;
  39         // Retruve animation ids list
  40         uint16_t huge *anim_ids =       (uint16_t huge *)
  41                                         ((byte huge *)vrs +
  42                                          vrs->offset_table[VRS_HEADER_OFFSET_ANIMATION_ID_LIST]);
  43
  44         // Loop through animation id untill match or end of list
  45         while(iter_id = anim_ids[new_anim_index])
  46         {
  47                 // Return on successful match
  48                 if (iter_id == anim_id)
  49                 {
  50                         init_anim(spri, new_anim_index);
  51                         return 0;
  52                 }
  53                 new_anim_index++;
  54         }
  55         return -1;
  56 }
  57
  58 void print_anim_ids(struct sprite *spri)
  59 {
  60         int new_anim_index = 0;
  61         int iter_id;
  62         struct vrs_header huge *vrs = spri->spritesheet->vrs_hdr;
  63         // Retruve animation ids list
  64         uint16_t huge *anim_ids =       (uint16_t huge *)
  65                                         ((byte huge *)vrs +
  66                                          vrs->offset_table[VRS_HEADER_OFFSET_ANIMATION_ID_LIST]);
  67
  68         if(!anim_ids[new_anim_index])
  69                 exit(3);
  70         // Loop through animation id untill match or end of list
  71         while(iter_id = anim_ids[new_anim_index])
  72         {
  73                 // Return on successful match
  74                 new_anim_index++;
  75         }
  76 }
  77
  78
  79 void animate_spri(struct sprite *spri)
  80 {
  81         int i;
  82         // Events go here
  83
  84         // Draw sprite
  85         i = get_vrl_by_id(spri->spritesheet, spri->curr_spri_id, spri->sprite_vrl_cont);
  86         if(i < 0)
  87         {
  88                 printf("Error retriving required sprite");
  89                 exit(-1);
  90         }
  91         draw_vrl1_vgax_modex(   spri->x, spri->y,
  92                                 spri->sprite_vrl_cont->vrl_header, spri->sprite_vrl_cont->line_offsets,
  93                                 spri->sprite_vrl_cont->buffer + sizeof(struct vrl1_vgax_header),
  94                                 spri->sprite_vrl_cont->data_size);
  95
  96         // Depending on delay, update indices
  97         switch(spri->delay){
  98                 // Delay = 0 means that sprite should loop. Nothing to change here
  99                 case 0:
 100                         break;
 101
 102                 // Delay = 1 means that on next time unit sprite should be changed
 103                 case 1:
 104                         spri->curr_anim_spri++;
 105
 106                         // If we hit the end of an animation sequence, restart it
 107                         if(!(spri->curr_spri_id = spri->curr_anim_list[spri->curr_anim_spri].sprite_id)){
 108                                 spri->curr_anim_spri = 0;
 109                                 spri->curr_spri_id = spri->curr_anim_list[spri->curr_anim_spri].sprite_id;
 110                         }
 111                         spri->delay = spri->curr_anim_list[spri->curr_anim_spri].delay;
 112
 113                 // Delay > 1 means that we should not change sprite yet. Decrease delay
 114                 default:
 115                         spri->delay--;
 116                         break;
 117         }
 118 }