gui.c

用C开发PDA程序的源码用C开发PDA程序的源码用C开发PDA程序的源码用C开发PDA程序的源码

/*========================================================================
 *
 *  版权所有 (C) 2000-2001 吴柏建. All Rights Reserved.
 *
 *  文件:       gui.c
 *  内容:		PSDE_DEMO_ED处理显示和消息的函数。
 *	作者:			吴柏建。
 *	制作日期:		2000.8.6-2001.8.6
 *	修改日期:		2001..
 *
 *========================================================================*/
#include "pda.h"

/*定义队列中容纳的消息数量*/
#define MSG_QUEUE_SIZE 32
/*定义全局的消息队列*/
PDAMSG MsgQueue[MSG_QUEUE_SIZE];
/*定义全局消息队列的写指针*/
int MsgWrite=0;
/*定义全局消息队列的读指针*/
int MsgRead=0;

/*======================================================================
---向全局消息队列MsgQueue中发送消息----SendMsg---
======================================================================*/
void SendMsg(PDAMSG *msg)
{
	if(msg->type!=MSG_NULL)
	{
		MsgQueue[MsgWrite]=*msg;
		MsgWrite=((++MsgWrite)%MSG_QUEUE_SIZE);
	}
}
/*======================================================================
---从全局消息队列MsgQueue中读一条消息----GetMsg---
======================================================================*/
short GetMsg(PDAMSG *msg)
{
	msg->type=MSG_NULL;
	if(MsgRead!=MsgWrite)
	{
		*msg=MsgQueue[MsgRead];
		MsgRead=((++MsgRead)%MSG_QUEUE_SIZE);
		return 1;/*msg有效*/
	}
	return 0;/*队列中无消息*/
}


#define LCD_WIDTH     112
#define LCD_HIGH       48
#define LCD_WIDTH_BYTE 14/* 6Bytes x 8Bits = 48Dots */

extern unsigned char DisBuffer[672];
extern unsigned char *RomAddress;

/*======================================================================
---在LCD中以某一颜色显示一点----DispDot---
======================================================================*/
void DispDot(int x,int y,unsigned char c)
{
	int offset=y*LCD_WIDTH_BYTE+(x>>3);
	unsigned char mask=(x&0x07);
	if(c)c=0x80;
	DisBuffer[offset]&=(~(0x80>>mask));
	DisBuffer[offset]|=(c>>mask);
}
/*======================================================================
---在LCD中以图象数据s显示一幅图象----DispImage---
---画点方式效率低下，建议用户用逻辑和移位操作优化数据拷贝---
======================================================================*/
void DispImage(int x,int y,int w,int h,unsigned char *s)
{
	int i,j,k;
	unsigned char mask;
	for(j=y;j<h+y;j++)
	{
		for(i=x;i<=x+w-8;i+=8)
		{
			mask=0x80;
			for(k=0;k<8;k++)
			{
				DispDot(i+k,j,*s&mask);
				mask=(mask>>1);
			}
			s++;
		}
	}
	if(w&0x07)
	{
		mask=0x80;
		for(j=y;j<h+y;j++)
		{
			for(k=0;k<(w&0x07);k++)DispDot(i+k,j,*s&mask);
			mask=(mask>>1);
		}
		s++;
	}
}

typedef struct _BMPHEAD
{
	unsigned char mode;
	unsigned char gray;
	unsigned short width;
	unsigned short high;
}BMPHEAD;

/*======================================================================
---在LCD中以包括图象头的图象数据s显示一幅图象----DispBmp---
======================================================================*/
void DispBmp(int x,int y,unsigned char *s)
{
	BMPHEAD *pBmphead=(BMPHEAD *)s;
	if(pBmphead->mode==0&&pBmphead->gray==1)DispImage(x,y,pBmphead->width,pBmphead->high,&s[sizeof(BMPHEAD)]);
}



unsigned char * GetFont8x16(unsigned char CharCode)
{
	return RomAddress+ROM_ASCII16+(long)(CharCode*16);
}
unsigned char * GetFont16x16(unsigned short CharCode)
{
	return RomAddress+ROM_HZK16+(((((CharCode&0x00ff)-0xa1)*94+((CharCode>>8)-0xa1)))*32);
}
int DispChar(int x,int y,unsigned short CharCode)
{
	if((CharCode>>8)&0x80)
	{
		if(16+x>=LCD_WIDTH)return 0;
		DispImage(x,y,16,16,GetFont16x16(CharCode));
		return 16;
	}
	else
	{
		if(8+x>=LCD_WIDTH)return 0;
		DispImage(x,y,8,16,GetFont8x16((unsigned char)CharCode));
		return 8;
	}
}
void DispStr(short x,short y,unsigned char *s)
{
	int i;
	while(*s&&*s!='\n'&&*s!='\r')
	{
		if((*s)&0x80)
		{
			i=DispChar(x,y,*((unsigned short*)s));
			s+=2;
		}
		else
		{
			i=DispChar(x,y,(unsigned short)(*s));
			s++;
		}
		if(!i)break;
		x+=i;
	}
}