1 use core::{ 2 intrinsics::unlikely, 3 sync::atomic::{AtomicI32, Ordering}, 4 }; 5 6 use system_error::SystemError; 7 8 use crate::driver::{ 9 serial::serial8250::send_to_default_serial8250_port, video::video_refresh_manager, 10 }; 11 12 use super::textui::{ 13 FontColor, LineId, LineIndex, TextuiCharChromatic, TEXTUI_CHAR_HEIGHT, TEXTUI_CHAR_WIDTH, 14 }; 15 16 pub static TRUE_LINE_NUM: AtomicI32 = AtomicI32::new(0); 17 pub static CHAR_PER_LINE: AtomicI32 = AtomicI32::new(0); 18 /// textui 未初始化时直接向缓冲区写，不使用虚拟行 19 pub static NO_ALLOC_OPERATIONS_LINE: AtomicI32 = AtomicI32::new(0); 20 pub static NO_ALLOC_OPERATIONS_INDEX: AtomicI32 = AtomicI32::new(0); 21 22 /// 当系统刚启动的时候，由于内存管理未初始化，而texiui需要动态内存分配。因此只能暂时暴力往屏幕（video_frame_buffer_info）输出信息 23 pub fn textui_init_no_alloc(video_enabled: bool) { 24 if video_enabled { 25 let height = video_refresh_manager().device_buffer().height(); 26 let width = video_refresh_manager().device_buffer().width(); 27 TRUE_LINE_NUM.store((height / TEXTUI_CHAR_HEIGHT) as i32, Ordering::SeqCst); 28 29 CHAR_PER_LINE.store((width / TEXTUI_CHAR_WIDTH) as i32, Ordering::SeqCst); 30 } 31 } 32 33 fn next_line() { 34 NO_ALLOC_OPERATIONS_INDEX.store(0, Ordering::SeqCst); 35 NO_ALLOC_OPERATIONS_LINE.fetch_add(1, Ordering::SeqCst); 36 if NO_ALLOC_OPERATIONS_LINE.load(Ordering::SeqCst) >= TRUE_LINE_NUM.load(Ordering::SeqCst) { 37 NO_ALLOC_OPERATIONS_LINE.store(0, Ordering::SeqCst); 38 } 39 } 40 41 pub fn no_init_textui_putchar_window( 42 character: char, 43 frcolor: FontColor, 44 bkcolor: FontColor, 45 is_put_to_window: bool, 46 ) -> Result<(), SystemError> { 47 //字符'\0'代表ASCII码表中的空字符,表示字符串的结尾 48 if unlikely(character == '\0') { 49 return Ok(()); 50 } 51 send_to_default_serial8250_port(&[character as u8]); 52 53 if is_put_to_window { 54 match character { 55 // 进行换行操作 56 '\n' => { 57 send_to_default_serial8250_port(&[b'\r']); 58 if is_put_to_window { 59 next_line(); 60 } 61 } 62 // 输出制表符 63 '\t' => { 64 let char = TextuiCharChromatic::new(Some(' '), frcolor, bkcolor); 65 //打印的空格数（注意将每行分成一个个表格，每个表格为8个字符） 66 let mut space_to_print = 8 - NO_ALLOC_OPERATIONS_INDEX.load(Ordering::SeqCst) % 8; 67 while space_to_print > 0 { 68 char.no_init_textui_render_chromatic( 69 LineId::new(NO_ALLOC_OPERATIONS_LINE.load(Ordering::SeqCst)), 70 LineIndex::new(NO_ALLOC_OPERATIONS_INDEX.load(Ordering::SeqCst)), 71 ); 72 NO_ALLOC_OPERATIONS_INDEX.fetch_add(1, Ordering::SeqCst); 73 space_to_print -= 1; 74 } 75 } 76 // 字符 '\x08' 代表 ASCII 码中的退格字符。它在输出中的作用是将光标向左移动一个位置，并在该位置上输出后续的字符，从而实现字符的删除或替换。 77 '\x08' => { 78 NO_ALLOC_OPERATIONS_INDEX.fetch_sub(1, Ordering::SeqCst); 79 let op_char = NO_ALLOC_OPERATIONS_INDEX.load(Ordering::SeqCst); 80 if op_char >= 0 { 81 let char = TextuiCharChromatic::new(Some(' '), frcolor, bkcolor); 82 char.no_init_textui_render_chromatic( 83 LineId::new(NO_ALLOC_OPERATIONS_LINE.load(Ordering::SeqCst)), 84 LineIndex::new(NO_ALLOC_OPERATIONS_INDEX.load(Ordering::SeqCst)), 85 ); 86 87 NO_ALLOC_OPERATIONS_INDEX.fetch_add(1, Ordering::SeqCst); 88 } 89 // 需要向上缩一行 90 if op_char < 0 { 91 // 上缩一行 92 NO_ALLOC_OPERATIONS_INDEX.store(0, Ordering::SeqCst); 93 NO_ALLOC_OPERATIONS_LINE.fetch_sub(1, Ordering::SeqCst); 94 95 if NO_ALLOC_OPERATIONS_LINE.load(Ordering::SeqCst) < 0 { 96 NO_ALLOC_OPERATIONS_LINE.store(0, Ordering::SeqCst); 97 } 98 } 99 } 100 // 输出其他字符 101 _ => { 102 let char = TextuiCharChromatic::new(Some(character), frcolor, bkcolor); 103 104 if NO_ALLOC_OPERATIONS_INDEX.load(Ordering::SeqCst) 105 == CHAR_PER_LINE.load(Ordering::SeqCst) 106 { 107 next_line(); 108 } 109 110 char.no_init_textui_render_chromatic( 111 LineId::new(NO_ALLOC_OPERATIONS_LINE.load(Ordering::SeqCst)), 112 LineIndex::new(NO_ALLOC_OPERATIONS_INDEX.load(Ordering::SeqCst)), 113 ); 114 115 NO_ALLOC_OPERATIONS_INDEX.fetch_add(1, Ordering::SeqCst); 116 } 117 } 118 } 119 return Ok(()); 120 } 121