badge/jumpnrun/level_load.c

   1 #include "levels.h"
   2 #include "tiles.h"
   3 #include "items.h"
   4 #include "enemies.h"
   5 #include "jumpnrun.h"
   6
   7 #ifndef __linux__
   8 #include <drivers/fatfs/ff.h>
   9 #endif
  10
  11 #include <stdio.h>
  12
  13 typedef struct {
  14   uint8_t  x;
  15   uint16_t y;
  16   uint8_t  type;
  17 } level_thing;
  18
  19 static level_thing jumpnrun_level_parse_blob(unsigned char blob[3]) {
  20   level_thing result;
  21
  22   result.y    = blob[0] >> 4;
  23   result.x    = ((blob[0] & 0xf) << 8) | blob[1];
  24   result.type = blob[2];
  25
  26   return result;
  27 }
  28
  29 static void jumpnrun_level_make_tile(jumpnrun_tile *dest, level_thing thing) {
  30   memset(dest, 0, sizeof(*dest));
  31
  32   dest->type  = thing.type;
  33   dest->pos.x = thing.x;
  34   dest->pos.y = thing.y;
  35 }
  36
  37 static void jumpnrun_level_make_item(jumpnrun_item *dest, level_thing thing) {
  38   memset(dest, 0, sizeof(*dest));
  39
  40   dest->type = &jumpnrun_item_type_data[thing.type];
  41
  42   uint8_t xoff = (JUMPNRUN_TILE_PIXEL_WIDTH - (dest->type->sprite.width % JUMPNRUN_TILE_PIXEL_WIDTH)) / 2;
  43   uint8_t yoff = thing.type != JUMPNRUN_ITEM_TYPE_CHECKPOINT ? 1 : 0; // HACK: spezielle Ausnahme
  44
  45   dest->pos.x = FIXED_POINT( thing.x      * JUMPNRUN_TILE_PIXEL_WIDTH                             + xoff, 0);
  46   dest->pos.y = FIXED_POINT((thing.y + 1) * JUMPNRUN_TILE_PIXEL_WIDTH - dest->type->sprite.height - yoff, 0);
  47 }
  48
  49 static void jumpnrun_level_make_enemy(jumpnrun_enemy *dest, level_thing thing) {
  50   memset(dest, 0, sizeof(*dest));
  51
  52   dest->type = &jumpnrun_enemy_type_data[thing.type];
  53
  54   dest->spawn_pos.x = FIXED_INT( thing.x      * JUMPNRUN_TILE_PIXEL_WIDTH  + fixed_point_cast_int(dest->type->hitbox.pos.x));
  55   dest->spawn_pos.y = FIXED_INT((thing.y + 1) * JUMPNRUN_TILE_PIXEL_HEIGHT - fixed_point_cast_int(dest->type->hitbox.extent.y));
  56   jumpnrun_enemy_despawn(dest);
  57 }
  58
  59 #ifdef __linux__
  60 int jumpnrun_load_level_header_from_file(jumpnrun_level *dest, FILE *fd) {
  61 #else
  62 int jumpnrun_load_level_header_from_file(jumpnrun_level *dest, FIL *fd) {
  63   UINT count;
  64 #endif
  65   uint16_t head[3];
  66
  67 #ifdef __linux__
  68   if(1 != fread(&head, sizeof(head), 1, fd)) {
  69 #else
  70   if(FR_OK != f_read(fd, head, sizeof(head), &count) || count != sizeof(head)) {
  71 #endif
  72     return JUMPNRUN_LEVEL_LOAD_ERROR;
  73   }
  74
  75   dest->header. tile_count = head[0];
  76   dest->header. item_count = head[1];
  77   dest->header.enemy_count = head[2];
  78
  79   return JUMPNRUN_LEVEL_LOAD_OK;
  80 }
  81
  82 #ifdef __linux__
  83 int jumpnrun_load_level_from_file(jumpnrun_level *dest, FILE *fd) {
  84 #else
  85 int jumpnrun_load_level_from_file(jumpnrun_level *dest, FIL *fd) {
  86   UINT count;
  87 #endif
  88   size_t i;
  89   unsigned char buf[3];
  90   uint16_t spos[2];
  91
  92 #ifdef __linux__
  93   if(1 != fread(spos, sizeof(spos), 1, fd)) {
  94 #else
  95   if(FR_OK != f_read(fd, spos, sizeof(spos), &count) || count != sizeof(spos)) {
  96 #endif
  97     return JUMPNRUN_LEVEL_LOAD_ERROR;
  98   } else {
  99     dest->start_pos.x = fixed_point_sub(FIXED_INT((spos[0] + 1) * JUMPNRUN_TILE_PIXEL_WIDTH ), jumpnrun_player_extents().x);
 100     dest->start_pos.y =                 FIXED_INT( spos[1]      * JUMPNRUN_TILE_PIXEL_HEIGHT);
 101   }
 102
 103   for(i = 0; i < dest->header.tile_count; ++i) {
 104 #ifdef __linux__
 105     if(1 != fread(buf, 3, 1, fd)) {
 106 #else
 107     if(FR_OK != f_read(fd, buf, sizeof(buf), &count) || count != sizeof(buf)) {
 108 #endif
 109       return JUMPNRUN_LEVEL_LOAD_ERROR;
 110     }
 111
 112     jumpnrun_level_make_tile(&dest->tiles[i], jumpnrun_level_parse_blob(buf));
 113     if(i != 0 &&
 114        ((dest->tiles[i - 1].pos.x >  dest->tiles[i].pos.x) ||
 115         (dest->tiles[i - 1].pos.x == dest->tiles[i].pos.x && dest->tiles[i - 1].pos.y >= dest->tiles[i].pos.y))) {
 116       return JUMPNRUN_LEVEL_LOAD_ERROR;
 117     }
 118   }
 119
 120   for(i = 0; i < dest->header.item_count; ++i) {
 121 #ifdef __linux__
 122     if(1 != fread(buf, 3, 1, fd)) {
 123 #else
 124     if(FR_OK != f_read(fd, buf, sizeof(buf), &count) || count != sizeof(buf)) {
 125 #endif
 126       return JUMPNRUN_LEVEL_LOAD_ERROR;
 127     }
 128
 129     jumpnrun_level_make_item(&dest->items[i], jumpnrun_level_parse_blob(buf));
 130     if(i != 0 &&
 131        (fixed_point_gt(dest->items[i - 1].pos.x, dest->items[i].pos.x) ||
 132         (fixed_point_eq(dest->items[i - 1].pos.x, dest->items[i].pos.x) && fixed_point_ge(dest->items[i - 1].pos.y, dest->items[i].pos.y)))) {
 133       return JUMPNRUN_LEVEL_LOAD_ERROR;
 134     }
 135   }
 136
 137   for(i = 0; i < dest->header.enemy_count; ++i) {
 138 #ifdef __linux__
 139     if(1 != fread(buf, 3, 1, fd)) {
 140 #else
 141     if(FR_OK != f_read(fd, buf, sizeof(buf), &count) || count != sizeof(buf)) {
 142 #endif
 143       return JUMPNRUN_LEVEL_LOAD_ERROR;
 144     }
 145
 146     jumpnrun_level_make_enemy(&dest->enemies[i], jumpnrun_level_parse_blob(buf));
 147     if(i != 0 &&
 148        (fixed_point_gt(dest->enemies[i - 1].spawn_pos.x, dest->enemies[i].spawn_pos.x) ||
 149         (fixed_point_eq(dest->enemies[i - 1].spawn_pos.x, dest->enemies[i].spawn_pos.x) && fixed_point_ge(dest->enemies[i - 1].spawn_pos.y, dest->enemies[i].spawn_pos.y)))) {
 150       return JUMPNRUN_LEVEL_LOAD_ERROR;
 151     }
 152   }
 153
 154   return JUMPNRUN_LEVEL_LOAD_OK;
 155 }