Method: Ray::GL::Buffer#update

Defined in:
ext/gl_buffer.c

#update(range = 0...size) ⇒ Object #update(first, size) ⇒ Object

Overloads:

  • #update(range = 0...size) ⇒ Object

    Updates a part of the buffer.



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# File 'ext/gl_buffer.c', line 137

static
VALUE ray_gl_buffer_update(int argc, VALUE *argv, VALUE self) {
  say_buffer *buf       = ray_rb2buffer(self);
  size_t      max_index = say_buffer_get_size(buf);

  if (argc == 0)
    say_buffer_update(buf);
  else if (argc == 2) {
    size_t begin = NUM2ULONG(argv[0]);
    size_t end   = NUM2ULONG(argv[1]);

    if (end > max_index)
      end = max_index;

    if (begin > end || begin > max_index)
      return self;

    size_t size = (end - begin) + 1;

    say_buffer_update_part(buf, begin, size);
  }
  else {
    VALUE range;
    rb_scan_args(argc, argv, "1", &range); /* raise exception */

    size_t begin = NUM2ULONG(rb_funcall(range, RAY_METH("begin"), 0));
    size_t end   = NUM2ULONG(rb_funcall(range, RAY_METH("end"), 0));

    if (end > max_index)
      end = max_index;

    if (begin > end || begin > max_index)
      return self;

    size_t size = (end - begin) + 1;

    say_buffer_update_part(buf, begin, size);
  }

  return self;
}