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我用 C 代码制作了一个内核，并添加了一个自定义的 .psf 字体。不幸的是，该程序似乎没有检测到目录中的文件是有效的。这是实际加载字体并打印结果的代码：

    void (*KernelStart)(Framebuffer*) = ((__attribute__((sysv_abi)) void (*)(Framebuffer*) ) header.e_entry);

    PSF1_FONT* newFont = LoadPSF1Font(NULL, L"zap-light16.psf", ImageHandle, SystemTable);
    if (newFont == NULL){
        Print(L"Font is not valid or is not found...\r\n");
    }
    else
    {
        Print(L"Font found. char size = %d\r\n", newFont->psf1_Header->charsize);
    }

    Framebuffer* newBuffer = InitializeGOP();

我认为该目录是正确的，因为程序从同一个地方加载文件（内核内的 bin 文件夹）。

“kernel.c”文件包含确定样式和光标位置的代码：

void putChar(Framebuffer* framebuffer, PSF1_FONT* psf1_font, unsigned int colour, char chr, unsigned int xOff, unsigned int yOff)
{
    unsigned int* pixPtr = (unsigned int*)framebuffer->BaseAddress;
    char* fontPtr = psf1_font->glyphBuffer + (chr * psf1_font->psf1_Header->charsize);
    for(unsigned long y = yOff; y < yOff + 16; y++){
        for (unsigned long x= xOff; x < xOff + 8; x++)
            if((*fontPtr & (0b10000000 >> (x - xOff))) > 0){
                *(unsigned int*)(pixPtr + x + (y * framebuffer->PixelsPerScanLine)) = colour;
            }

    }
    fontPtr++;
}

Point CursorPosition;
void Print(Framebuffer* framebuffer, PSF1_FONT* psf1_font, unsigned int colour, char* str)
{
    
    char* chr = str;
    while(*chr != 0){
        putChar(framebuffer, psf1_font, colour, *chr, CursorPosition.X, CursorPosition.Y);
        CursorPosition.X+=8;
        if(CursorPosition.X + 8 > framebuffer->Width)
        {
        CursorPosition.X = 0;
        CursorPosition.Y += 16;
        }
        chr++;
    }
}

void _start(Framebuffer* framebuffer, PSF1_FONT* psf1_font){
    CursorPosition.X = 50;
    CursorPosition.Y = 120;
    for (int t = 0; t < 50; t+=1){

    Print(framebuffer, psf1_font, 0xffffffff, "Hello Kernel :)");
    }
    return;
}

编译器也不返回任何错误。我收到的唯一反馈来自我自己的程序，它决定了字体是否正确。

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