2.【VGA英文字符显示】

1、打印字符A

效果
字符A的像素点阵

// 字符A像素点阵8x16
/*
    00000000
    00011000
    00011000
    00011000
    00011000
    00100100
    00100100
    00100100
    00100100
    01111110
    01000010
    01000010
    01000010
    11100111
    00000000
    00000000
*/
static char font_A[16] = {
    0x00, 0x18, 0x18, 0x18, 0x18, 0x24, 0x24, 0x24,
    0x24, 0x7e, 0x42, 0x42, 0x42, 0xe7, 0x00, 0x00,
};

打印函数

// 打印字符
void putfont8(char *vram, int xsize, int x, int y, char c, char *font){
    for(int i = 0; i < 16; i++){
        char *p = vram + (y + i) * xsize + x;
        char d = font[i];
        
        if((d & 0x80) != 0) { p[0] = c; }
        if((d & 0x40) != 0) { p[1] = c; }
        if((d & 0x20) != 0) { p[2] = c; }
        if((d & 0x10) != 0) { p[3] = c; }
        if((d & 0x08) != 0) { p[4] = c; }
        if((d & 0x04) != 0) { p[5] = c; }
        if((d & 0x02) != 0) { p[6] = c; }
        if((d & 0x01) != 0) { p[7] = c; }
    }
}

调用：

    // 打印字符A
    putfont8(vram, xsize, 8, 8, COL8_FFFFFF, font_A);