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/* Copyright (c) [2023] [Syswonder Community]
 *   [Rukos] is licensed under Mulan PSL v2.
 *   You can use this software according to the terms and conditions of the Mulan PSL v2.
 *   You may obtain a copy of Mulan PSL v2 at:
 *               http://license.coscl.org.cn/MulanPSL2
 *   THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 *   See the Mulan PSL v2 for more details.
 */

//! [ArceOS](https://github.com/rcore-os/arceos) graphics module.
//!
//! Currently only supports direct writing to the framebuffer.

#![no_std]

#[macro_use]
extern crate log;

#[doc(no_inline)]
pub use driver_display::DisplayInfo;

use axdriver::{prelude::*, AxDeviceContainer};
use axsync::Mutex;
use lazy_init::LazyInit;

static MAIN_DISPLAY: LazyInit<Mutex<AxDisplayDevice>> = LazyInit::new();

/// Initializes the graphics subsystem by underlayer devices.
pub fn init_display(mut display_devs: AxDeviceContainer<AxDisplayDevice>) {
    info!("Initialize graphics subsystem...");

    let dev = display_devs.take_one().expect("No graphics device found!");
    info!("  use graphics device 0: {:?}", dev.device_name());
    MAIN_DISPLAY.init_by(Mutex::new(dev));
}

/// Gets the framebuffer information.
pub fn framebuffer_info() -> DisplayInfo {
    MAIN_DISPLAY.lock().info()
}

/// Flushes the framebuffer, i.e. show on the screen.
pub fn framebuffer_flush() {
    MAIN_DISPLAY.lock().flush().unwrap();
}