Problem: Allocate an array of structs within a struct.

I'm trying to create a pixel buffer for a render bucket but I can't get my head around the pointers. Or the declaration.
Can anyone help me sort this out?

// I need to allocate this:

Code:

---

struct pixel {        unsigned char R;
                        unsigned char G;
                        unsigned char B; };

---

in this

Code:

---

struct bucket {        long double max;
                        long double min;
                        long double factor;
                        int max_it;
                        int size;
                        int xStart;
                        int yStart;
                        struct pixel *buffer;
                        char started;
                        char done; };

---

Access it in another function

Code:

---

        bucket->buffer[xl+(yl*bucket->size)].R = map(brightness*brightness, 0, 1000, 0, 155);
        bucket->buffer[xl+(yl*bucket->size)].G = map(brightness, 0, 255, 0, 155);
        bucket->buffer[xl+(yl*bucket->size)].B = map(brightness, 0, 255, 0, 255);

---

So how do I declare and allocate it?

Code:

---

int main(int argc, char *argv[])
{
        struct bucket bucketlist[buckets_per_frame];
        struct pixel* buffer[pixels_per_bucket];

        for ( i=0 ; i<buckets_per_frame ; i++ )
        {
                for ( j=0 ; j<pixels_per_bucket ; j++ )
                {
                        bucketlist[i].buffer[j] = (struct pixel *) malloc(sizeof(struct pixel));
                }
        }
}

---

Code:

---

int main()
{
    struct bucket bucketlist[buckets_per_frame];
 
    for ( int i=0 ; i<buckets_per_frame ; i++ )
    {
        bucketlist[i].buffer = malloc(pixels_per_bucket * sizeof(struct pixel));
    }
 
    // ...
 
    for ( int i=0 ; i<buckets_per_frame ; i++ )
    {
        free( bucketlist[i] );
    }
 
    return 0;
}

---