Update image creation function

src/image/image.c

@@ -8,17 +8,18 @@ Image *create_image(u64 width, u64 height, Pixel *data, Arena *arena) {
     return NULL;
   }
 
-  u64 buf_length = width * height;
-  u64 total_size = sizeof(Image) + sizeof(Pixel) * buf_length;
+  u64 pixel_count = width * height;
+  u64 buf_length = sizeof(Pixel) * pixel_count;
+  u64 alloc_size = sizeof(Image) + buf_length;
 
-  Image *img = wapp_mem_arena_alloc(arena, total_size);
+  Image *img = wapp_mem_arena_alloc(arena, alloc_size);
   if (!img) {
     return NULL;
   }
 
   img->width = width;
   img->height = height;
-  img->buf_length = buf_length;
+  img->pixel_count = pixel_count;
   memcpy(img->data, data, buf_length);
 
   return img;

src/image/image.h

@@ -20,7 +20,7 @@ typedef struct image Image;
 struct image {
   u64 width;
   u64 height;
-  u64 buf_length;
+  u64 pixel_count;
   Pixel data[];
 };