font.cpp

用FREE BASIC做的演示程序

#include<windows.h>
#include<fstream>
#include<assert.h>
#include"Font.h"
#include"GFileLoader.h"
#include"GScreen.h"
const unsigned long GFont::C_FONT_MASK[]=
{
	1,1<<1,1<<2,1<<3,1<<4,1<<5,1<<6,1<<7,
	1<<8,1<<9,1<<10,1<<11,1<<12,1<<13,1<<14,1<<15
};
GFont::GFont()
{
	m_pFontData=NULL;
	memset(&m_ffh,0,sizeof(m_ffh));
}
GFont::~GFont()
{
	if(m_pFontData)
	{
		delete [] m_pFontData;
		m_pFontData=NULL;
	}
}

bool GFont::LoadFontFile(GFileLoader*pFileLoader,const string &szFileName)
{
	assert(pFileLoader);
	unsigned long dwFileSize;
	char*pBuffer;
	if(!pFileLoader->LoadFile(szFileName,&pBuffer,dwFileSize))
		return false;
	memcpy(&m_ffh,pBuffer,sizeof(m_ffh));
	if(m_ffh.wID!=GPP_FONT_FILE_ID)
	{
		delete [] pBuffer;
		return false;
	}
	if(m_pFontData)
	{
		delete [] m_pFontData;
	}
	m_pFontData=new unsigned short[m_ffh.dwFontDataSize];
	if(NULL==m_pFontData)
	{
		delete [] pBuffer;
		return false;
	}
	memcpy((char*)m_pFontData,pBuffer+sizeof(m_ffh),m_ffh.dwFontDataSize*sizeof(unsigned short));
	delete [] pBuffer;
	return true;
}

bool GFont::SaveFontDataToFile(const string &strFontFile,const GFontFileHeader & fh,unsigned char*pData)
{
	ofstream ofs(strFontFile.data(),ios::out|ios::binary);
	if(!ofs.is_open())
	{
		return false;
	}
	ofs.write((const char*)&fh,sizeof(fh));
	ofs.write((const char*)pData,fh.dwFontDataSize*sizeof(unsigned short));
	ofs.close();
	return true;
}
void GFont::DrawTextFastToScreen(GScreen*pScreen,int x,int y,int nLineChar,unsigned char byColorIndex,char*szText)
{
	assert(pScreen);
	assert(szText);
	int nTextIndex;
	int i=0;
	int nAsciiWidth=m_ffh.byFontWidth>>1;
	int OrgX=x;
	while(szText[i]!='\0')
	{
		nTextIndex=0;
		
		while(szText[i]!='\0' && nTextIndex< nLineChar)
		{
			if(szText[i]<0)													//如果是汉字
			{
				unsigned short*pFontUnicode=GetUnicode(szText[i],szText[i+1]);
				
				for(register int m=0;m<GPP_FONT_MAX_HEIGHT;m++)
				{
					for(register int n=0;n<m_ffh.byFontHeight;n++)
					{
						if(*pFontUnicode & GFont::C_FONT_MASK[n])
						{
							pScreen->DrawPixel(x+n,y+m,byColorIndex);
						}
					}
					pFontUnicode++;
				}
				
				x+=m_ffh.byFontWidth+1;

				nTextIndex+=2;
				i+=2;
			}
			else
			{
				
				unsigned short*pFontChar=GetAscIIChar(szText[i]);
				for(register int m=0;m<GPP_FONT_MAX_HEIGHT;m++)
				{
					for(register int n=0;n<nAsciiWidth;n++)
					{
						if(*pFontChar & GFont::C_FONT_MASK[n])
						{
							pScreen->DrawPixel(x+n,y+m,byColorIndex);
						}
					}
					pFontChar++;
				}
				x+=nAsciiWidth+1;
				nTextIndex++;
				i++;
			}
		}
		x=OrgX;
		y+=m_ffh.byFontHeight+2;
	}
}
void GFont::DrawTextFormatToScreen(GScreen*pScreen,int x,int y,int nLineChar,unsigned char byColorIndex,char*szText,...)
{
	char txt[1024];
	va_list vl;
	va_start(vl,szText);
	vsprintf(txt,szText,vl);
	va_end(vl);
	DrawTextFastToScreen(pScreen,x,y,nLineChar,byColorIndex,txt);
}