void LCD_ShowChar(u16 x,u16 y,u8 num,u8 size,u8 mode)
{    
  u8 temp,t1,t;
u16 y0=y;
u8 csize=(size/8+((size%8)?1:0))*(size/2); //????×???????×?·????????ó???ù????×?????
//?è???°??   
num=num-' ';//?????????ó????,??C????????×?·??????±??????????????????
for(t=0;t<csize;t++)
{   
if(size==12)temp=asc2_1206[num][t]; //?÷??1206×???
else if(size==16)temp=asc2_1608[num][t]; //?÷??1608×???
else if(size==24)temp=asc2_2412[num][t]; //?÷??2412×???
else if(size==50)temp=asc2_5025[num][t];  //?÷??5025×???
else return; //??????×???
for(t1=0;t1<8;t1++)
{    
if(temp&0x80)LCD_Fast_DrawPoint(x,y,POINT_COLOR);
else if(mode==0)LCD_Fast_DrawPoint(x,y,BACK_COLOR);
temp<<=1;
y++;
if(x>=lcddev.width)return; //?????ò??
if((y-y0)==size)
{
y=y0;
x++;
if(x>=lcddev.width)return; //?????ò??
break;
}
}    
}  
}

请问大神们，程序中if(temp&0x80)LCD_Fast_DrawPoint(x,y,POINT_COLOR);这句话的意思，看了好久看不大明白