G2D性能比较慢的问题（melis4.0）

[Bruce_Gan]

在使用G2D，的填充接口，发现比其计算完的时间比SW还慢。
同样BLEND 掐出的时间也是比 软算法的要慢好多。
屏幕分辨率是1280*800 的ARGB格式 ，掐的是ioctl(lv_port_data.h_rotate, G2D_CMD_FILLRECT_H, (unsigned long)&info) 这接接口。需要4.9ms。
LVGL 的Fill 软件算法只要1ms 。

难道硬件G2D 就是要这么长时间么？

FILL代码如下：

   g2d_fillrect_h info;
   memset(&info, 0, sizeof(g2d_fillrect_h));
    if (opa > LV_OPA_MAX) {
        info.dst_image_h.alpha = 255;
    } else {
        info.dst_image_h.alpha = opa;
        color.ch.alpha = opa;
    }
    info.dst_image_h.mode = G2D_PIXEL_ALPHA;
    info.dst_image_h.color = color.full;
    info.dst_image_h.format = G2D_FORMAT_ARGB8888;
    info.dst_image_h.clip_rect.x = draw_area->x1;
    info.dst_image_h.clip_rect.y = draw_area->y1;
    info.dst_image_h.clip_rect.w = draw_area_w;
    info.dst_image_h.clip_rect.h = draw_area_h;
    info.dst_image_h.width = disp_w;
    info.dst_image_h.height = disp_h;
    info.dst_image_h.align[0] = 0;
    info.dst_image_h.align[1] = info.dst_image_h.align[0];
    info.dst_image_h.align[2] = info.dst_image_h.align[0];
    info.dst_image_h.laddr[0] = (unsigned int)esMEMS_VA2PA(dest_buf);
    info.dst_image_h.laddr[1] = 0;
    info.dst_image_h.laddr[2] = 0;
    info.dst_image_h.use_phy_addr = 1;

    int ret;
    if(lv_port_data.h_rotate < 0) {
        lv_port_data.h_rotate = open("/dev/g2d", O_WRONLY);
    }

    ret = ioctl(lv_port_data.h_rotate, G2D_CMD_FILLRECT_H, (unsigned long)&info);
    if(ret < 0) {
        __err("ERROR: sunxifb_g2d_fill G2D_CMD_FILLRECT_H failed");
    }
    close(lv_port_data.h_rotate);