fetch_pixel_general (bits_image_t *image, int x, int y, pixman_bool_t check_bounds)
{
    uint32_t pixel;

    if (check_bounds &&
	(x < 0 || x >= image->width || y < 0 || y >= image->height))
    {
	return 0;
    }

    pixel = image->fetch_pixel_32 (image, x, y);

    if (image->common.alpha_map)
    {
	uint32_t pixel_a;

	x -= image->common.alpha_origin_x;
	y -= image->common.alpha_origin_y;

	if (x < 0 || x >= image->common.alpha_map->width ||
	    y < 0 || y >= image->common.alpha_map->height)
	{
	    pixel_a = 0;
	}
	else
	{
	    pixel_a = image->common.alpha_map->fetch_pixel_32 (
		image->common.alpha_map, x, y);

	    pixel_a = ALPHA_8 (pixel_a);
	}

	pixel &= 0x00ffffff;
	pixel |= (pixel_a << 24);
    }

    return pixel;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.