OLED displays how to understand the character sizes of 12*6, 16*8, 24*12, etc

The mold taking method set in the figure above , In the mold taking instructions in the upper right corner, there are .
namely ： Start from the first column and take down every 8 Points as a byte , If there is not enough in the end 8 Fill it up at one point 8 position .（ a key ！！！）
The mold order is from high to low , That is, the first point is the highest .
Such as *------- Take 10000000. In fact, it is as shown in the figure 17.3.3 In the way shown ：

From top to bottom , From left to right , High in the former . We take the mold in this way , And then put ASCII Character set press 12x6 size 、 16x8 and 24x12 Take the size mold out （ The corresponding Chinese character size is 12x12、 16x16 and 24x24, The of characters is only half the size of Chinese characters ！）, Save in oledfont.h Inside , Every 12x6 Character occupation of 12 Bytes （ Be careful , Because they are written in bytes , In all column directions 12 Point by point 16 A little bit 2 Byte processing , therefore 12x6 Character usage 2x6=12 Bytes ）, Every 16x8 Character occupation of 16 Bytes , Every 24x12 Character occupation of 36 Bytes .
Let's analyze a piece of code ：

// Display a character at the specified position , Including some characters 
//x:0~127
//y:0~63
//mode:0, On the contrary ;1, Normal display  
//size: Select the font  12/16/24
void OLED_ShowChar(u8 x,u8 y,u8 chr,u8 size,u8 mode)
{
          			    
	u8 temp,t,t1;
	u8 y0=y;
	u8 csize=(size/8+((size%8)?1:0))*(size/2);		// Get the number of bytes of a font character corresponding to the lattice set 
	chr=chr-' ';// Get the offset value  
    for(t=0;t<csize;t++)
    {
       
			if(size==12)
				temp=asc2_1206[chr][t]; 	 	// call 1206 typeface 
			else
				if(size==16)
					temp=asc2_1608[chr][t];	// call 1608 typeface 
			else
				if(size==24)
					temp=asc2_2412[chr][t];	// call 2412 typeface 
			else
				return;								// No word bank 
			for(t1=0;t1<8;t1++)
			{
    
				if(temp&0x80)
					OLED_DrawPoint(x,y,mode);
				else
					OLED_DrawPoint(x,y,!mode);
				temp<<=1;
				
				y++;
				if((y-y0)==size)
				{
    
					y=y0;
					x++;
					break;
				}
			}  	 
    }          
}

Suppose you print 12*6 The characters of , When size=12 when ,csize = 12.

				if((y-y0)==size)
				{
    
					y=y0;
					x++;
					break;
				}

Although the height of characters takes 2 Bytes 16 A little bit , But this code limits the display height to size, That is, the height displayed is 12.
The same can be said for others .