src/platforms.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <assert.h>
   4 #include <string.h>
   5
   6 #include <SDL2/SDL.h>
   7
   8 #include "./platforms.h"
   9
  10 struct platforms_t {
  11     struct rect_t *rects;
  12     size_t rects_size;
  13 };
  14
  15 struct platforms_t *create_platforms(const struct rect_t *rects, size_t rects_size)
  16 {
  17     assert(rects);
  18
  19     struct platforms_t *platforms = malloc(sizeof(struct platforms_t));
  20
  21     if (platforms == NULL) {
  22         goto platforms_malloc_fail;
  23     }
  24
  25     platforms->rects = malloc(sizeof(struct rect_t) * rects_size);
  26
  27     if (platforms->rects == NULL) {
  28         goto platforms_rects_malloc_fail;
  29     }
  30
  31     platforms->rects = memcpy(platforms->rects, rects, sizeof(struct rect_t) * rects_size);
  32     platforms->rects_size = rects_size;
  33
  34     return platforms;
  35
  36 platforms_rects_malloc_fail:
  37     free(platforms);
  38 platforms_malloc_fail:
  39     return NULL;
  40 }
  41
  42 void destroy_platforms(struct platforms_t *platforms)
  43 {
  44     assert(platforms);
  45
  46     free(platforms->rects);
  47     free(platforms);
  48 }
  49
  50 int render_platforms(const struct platforms_t *platforms,
  51                      SDL_Renderer *renderer)
  52 {
  53     if (SDL_SetRenderDrawColor(renderer, 255, 96, 96, 255) < 0) {
  54         return -1;
  55     }
  56
  57     SDL_Rect rect;
  58
  59     for (size_t i = 0; i < platforms->rects_size; ++i) {
  60         rect.x = (int)roundf(platforms->rects[i].x);
  61         rect.y = (int)roundf(platforms->rects[i].y);
  62         rect.w = (int)roundf(platforms->rects[i].w);
  63         rect.h = (int)roundf(platforms->rects[i].h);
  64
  65         if (SDL_RenderFillRect(renderer, &rect) < 0) {
  66             return -1;
  67         }
  68     }
  69
  70     return 0;
  71 }
  72
  73 int platforms_rect_object_collide(const struct platforms_t *platforms,
  74                                   const struct rect_t *object)
  75 {
  76     assert(platforms);
  77     assert(object);
  78
  79     for (size_t i = 0; i < platforms->rects_size; ++i) {
  80         if (rects_intersect(object, &platforms->rects[i])) {
  81             return 1;
  82         }
  83     }
  84
  85     return 0;
  86 }