character.c

来自「2440 ADS项目」· C语言 代码 · 共 89 行

#include "color.h"
#include "graphic.h"
#include "character.h"
#include "ascii.h"
#include "hzk16x16.h"

/*
 * display an ascii character
 * x,y : coordinate of the start pixel
 * ascii_codes : the pointer of the character in the font lib  
 * the size of the ascii characters is 8*16
 * color : the color of the character
 */
void display_ascii(unsigned int x, unsigned int y, unsigned char* ascii_codes, int color)
{
	unsigned char* data;
	unsigned char* p = ascii_codes;
	int i, j, xpos = x, ypos = y;
	unsigned char c;
	
	while(*p != '\0') {
	 	data = ASCII_FONT_BITMAP + (unsigned int)*p * 16;
	 	for(i=0; i<16; i++) {
	 		c = *data++;
	 		for(j=0; j<8; j++) {
	 			if(c & (128 >> j))
	 				draw_dot(xpos+j, ypos+i, color);
	 		}
	 	}
	 	xpos += 8;
		++p;
	}
	
}

void draw_dot2(int x, int y, int color)
{
	int x0 = x * 3;
	int y0 = y * 3;
	int i, j;
	
	for(i=x0-1; i<x0+2; i++)
		for(j=y0-1; j<y0+2; j++)
			draw_dot(i, j, color);
}



/*
 * display a string,the string can contain
 * only ascii characters
 *
 * x,y : the beginning coordinate of the string to be displayed
 * 0<=x<=39 : each line holds 80 bytes (each byte contain 8 pixels) horizontally
 * 0<=y<=14 : each line holds 32 pixels vertically
 *
 * so the whole LCD can display 80*30 ascii characters,
 * 
 *
 * color : the color of the string 
 */
void display_chinese(unsigned int x, unsigned int y, unsigned char* str, int color)
{
	unsigned char* data;
	unsigned char* p = str;
	int i, j, xpos = x, ypos = y, offset;
	unsigned char ch, cl;
	
	while(*p != '\0') {
		ch = *p++;
		cl = *p++;
		offset = ( (ch-0xa1)*94 + (cl-0xa1) )*32;
	 	data = GB2312_16X16_FONT_BITMAP + offset;
		
	 	for(i=0; i<16; i++) {
	 		ch = *data++;
	 		cl = *data++; 
	 		for(j=0; j<16; j++) {
	 			if(ch & (0x80 >> j))
	 				draw_dot(xpos+j, ypos+i, color);
	 			if(cl & (0x80 >> j))
	 				draw_dot(xpos+j+8, ypos+i, color);
	 		}
	 	}
	 	xpos += 16;
	}
	
}