devfont.c

神龙卡开发原代码

		if ( c0 < 0x80 ) {
			/* Plain ASCII character, simple translation :-) */
			*unicode16++ = c0;
			count++;
			continue;
		}

		if ( (c0 & 0xc0) == 0x80 )
			/* Illegal; starts with 10xxxxxx */
			return -1;

		/* c0 must be 11xxxxxx if we get here => at least 2 bytes */
		scalar = c0;
		if(--cc < 0)
			return -1;
		c1 = *utf8++;
		/*DPRINTF("c1=%02x\n",c1);*/
		if ( (c1 & 0xc0) != 0x80 )
			/* Bad byte */
			return -1;
		scalar <<= 6;
		scalar |= (c1 & 0x3f);

		if ( !(c0 & 0x20) ) {
			/* Two bytes UTF-8 */
			if ( scalar < 0x80 )
				return -1;	/* Overlong encoding */
			*unicode16++ = scalar & 0x7ff;
			count++;
			continue;
		}

		/* c0 must be 111xxxxx if we get here => at least 3 bytes */
		if(--cc < 0)
			return -1;
		c1 = *utf8++;
		/*DPRINTF("c1=%02x\n",c1);*/
		if ( (c1 & 0xc0) != 0x80 )
			/* Bad byte */
			return -1;
		scalar <<= 6;
		scalar |= (c1 & 0x3f);

		if ( !(c0 & 0x10) ) {
			/*DPRINTF("####\n");*/
			/* Three bytes UTF-8 */
			if ( scalar < 0x800 )
				return -1;	/* Overlong encoding */
			if ( scalar >= 0xd800 && scalar < 0xe000 )
				return -1;	/* UTF-16 high/low halfs */
			*unicode16++ = scalar & 0xffff;
			count++;
			continue;
		}

		/* c0 must be 1111xxxx if we get here => at least 4 bytes */
		c1 = *utf8++;
		if(--cc < 0)
			return -1;
		/*DPRINTF("c1=%02x\n",c1);*/
		if ( (c1 & 0xc0) != 0x80 )
			/* Bad byte */
			return -1;
		scalar <<= 6;
		scalar |= (c1 & 0x3f);

		if ( !(c0 & 0x08) ) {
			/* Four bytes UTF-8, needs encoding as surrogates */
			if ( scalar < 0x10000 )
				return -1;	/* Overlong encoding */
			scalar -= 0x10000;
			*unicode16++ = ((scalar >> 10) & 0x3ff) + 0xd800;
			*unicode16++ = (scalar & 0x3ff) + 0xdc00;
			count += 2;
			continue;
		}

		return -1;	/* No support for more than four byte UTF-8 */
	}
	return count;
}

#if HAVE_HZK_SUPPORT

/* UniCode-16 (MWTF_UC16) to GB(MWTF_ASCII) Chinese Characters conversion.
 * a single 2-byte UC16 character is encoded into a surrogate pair.
 * return -1 ,if error;
 * The destination array must be able to hold as many
 * as there are Unicode-16 characters.
 *
 * Copyright (c) 2000 Tang Hao (TownHall)([e-mail]).
 */
static int
UC16_to_GB(const unsigned char *uc16, int cc, unsigned char *ascii)
{
	FILE* fp;
	char buffer[256];
	unsigned char *uc16p;
	int i=0,j=0, k;
	unsigned char *filebuffer;
	unsigned short *uc16pp,*table;
	unsigned short uc16px;
	int length=31504;

	if (use_big5)
		length=54840;

    	uc16p=(unsigned char *) uc16;
	uc16pp=(unsigned short *) uc16;

	strcpy(buffer,HZK_FONT_DIR);
	if (use_big5)
    		strcat(buffer,"/BG2UBG.KU");
	else
    		strcat(buffer,"/UGB2GB.KU");
	if(!(fp = fopen(buffer, "rb"))) 
	{
   	  	 fprintf (stderr, "Error.\nThe %s file can not be found!\n",buffer);
   		 return -1;
    	}

	filebuffer= (unsigned char *)malloc ( length);

	if(fread(filebuffer, sizeof(char),length, fp) < length) {
	   	  fprintf (stderr, "Error in reading ugb2gb.ku file!\n");
	   	  fclose(fp);
 	     	  return -1;
	}
    	fclose(fp);

	if (use_big5)
	{
		table=(unsigned short *)filebuffer;
		while(1)
		{
			if(j>=cc)
			{
				ascii[i]=0;
				break;
			}
			uc16px=*uc16pp;
			if((uc16px)<=0x00ff)
			{
				ascii[i]=(char)(*uc16pp);
				i++;
			}
			else
			{
				ascii[i]=0xa1; ascii[i+1]=0x40;
				for (k=0; k<13710; k++)
				{
					if (*(table+(k*2+1))==(uc16px))
					{
						ascii[i]=(char)((*(table+(k*2)) & 0xff00) >> 8);
						ascii[i+1]=(char)(*(table+(k*2)) & 0x00ff);
						break;
					}
				}
				i+=2;
			}
			uc16pp++; j++;
		}
	}
	else
	{
	while(1)
	{
		if(j>=cc)
		{
			ascii[i]=0;
			break;
		}
		if((*((uc16p)+j)==0)&&(*((uc16p)+j+1)==0))
		{
			ascii[i]=0;
			break;
		}
		else
		{
			if(*((uc16p)+j+1)==0)
			{
				ascii[i]=*((uc16p)+j);
				i++;
				j+=2;
			}
			else
			{
			/* to find the place of unicode charater .二分法匹配*/
            		{
				int p1=0,p2=length-4,p;
				unsigned int c1,c2,c,d;
				c1=((unsigned int )filebuffer[p1])*0x100+(filebuffer[p1+1]);
                		c2=((unsigned int )filebuffer[p2])*0x100+(filebuffer[p2+1]);
				d=((unsigned int )*((uc16p)+j))*0x100+*((uc16p)+j+1);
                		if(c1==d)
				{
					ascii[i]=filebuffer[p1+2];
					ascii[i+1]=filebuffer[p1+3];
					goto findit;
 	            		}
                		if(c2==d)
				{
					ascii[i]=filebuffer[p2+2];
					ascii[i+1]=filebuffer[p2+3];
					goto findit;
                		}
				while(1)
				{
					p=(((p2-p1)/2+p1)>>2)<<2;
					c=((unsigned int )filebuffer[p])*0x100+(filebuffer[p+1]);
					if(d==c)	/* find it*/
					{
						ascii[i]=filebuffer[p+2];
						ascii[i+1]=filebuffer[p+3];
						break;
          	   	   		}
					else if(p2<=p1+4)	/* can't find.*/
					{
						ascii[i]='.';	/* ((uc16p)+j);*/
						ascii[i+1]='.';	/* ((uc16p)+j+1);*/
						break;
					}
					else if(d<c)
					{
						p2=p;
						c2=c;										
                  			}
					else
					{
						p1=p;
						c1=c;														
					}
				}
	            	}
			findit:
  			i+=2;
			j+=2;
			}
		}
	}
	}
	free(filebuffer);

	return i;
}

/************************** functions definition ******************************/

static int hzk_id( PMWHZKFONT pf )
{
	switch(pf->font_height)
	{
	case 12:
		return 0;
	case 16: default:
		return 1;
	}
}

/* This function get Chinese font info from etc file.*/
static MWBOOL GetCFontInfo( PMWHZKFONT pf )
{
	int charset;

	if (use_big5)
		charset=(13094+408);
	else
		charset=8178;

    	CFont[hzk_id(pf)].width = pf->cfont_width;
    	pf->CFont.width = pf->cfont_width;

    	CFont[hzk_id(pf)].height = pf->font_height;
    	pf->CFont.height = pf->font_height;

    	CFont[hzk_id(pf)].size = ((pf->CFont.width + 7) / 8) *
		pf->CFont.height * charset;
    	pf->CFont.size = ((pf->CFont.width + 7) / 8) * pf->CFont.height * charset;

    	if(pf->CFont.size < charset * 8)
        	return FALSE;

	strcpy(CFont[hzk_id(pf)].file,HZK_FONT_DIR);
	strcpy(pf->CFont.file,HZK_FONT_DIR);

	if(pf->font_height==16)
	{
		strcat(CFont[hzk_id(pf)].file,"/hzk16");
		strcat(pf->CFont.file,"/hzk16");
	}
	else
	{
		strcat(CFont[hzk_id(pf)].file,"/hzk12");
		strcat(pf->CFont.file,"/hzk12");
	}

    	if (use_big5)
    	{
		CFont[hzk_id(pf)].file[strlen(pf->CFont.file)-3]+=use_big5;
		pf->CFont.file[strlen(pf->CFont.file)-3]+=use_big5;
    	}

    	return TRUE;
}

/* This function get ASCII font info from etc file.*/
static MWBOOL GetAFontInfo( PMWHZKFONT pf )
{
    	AFont[hzk_id(pf)].width = pf->afont_width;
    	pf->AFont.width = pf->afont_width;

    	AFont[hzk_id(pf)].height = pf->font_height;
    	pf->AFont.height = pf->font_height;

    	AFont[hzk_id(pf)].size = ((pf->AFont.width + 7) / 8) *
		pf->AFont.height * 255;
    	pf->AFont.size = ((pf->AFont.width + 7) / 8) * pf->AFont.height * 255;
    
	if(pf->AFont.size < 255 * 8)
        	return FALSE;

	strcpy(AFont[hzk_id(pf)].file,HZK_FONT_DIR);
	strcpy(pf->AFont.file,HZK_FONT_DIR);
	
	if(pf->font_height==16)
	{
	    	strcat(AFont[hzk_id(pf)].file,"/asc16");
	    	strcat(pf->AFont.file,"/asc16");
	}
  	else
	{
	    	strcat(AFont[hzk_id(pf)].file,"/asc12");
	    	strcat(pf->AFont.file,"/asc12");
	}
    	return TRUE;
}

/* This function load system font into memory.*/
static MWBOOL LoadFont( PMWHZKFONT pf )
{
    	FILE* fp;

	if(!GetCFontInfo(pf))
	{
		fprintf (stderr, "Get Chinese HZK font info failure!\n");
		return FALSE;
	}
    	if(CFont[hzk_id(pf)].pFont == NULL)	/* check font cache*/
	{
		

 	   	/* Allocate system memory for Chinese font.*/
 		if( !(CFont[hzk_id(pf)].pFont = (char *)malloc(pf->CFont.size)) )
 		{
	 	       	fprintf (stderr, "Allocate memory for Chinese HZK font failure.\n");
		        return FALSE;
	 	}
 	
		/* Open font file and read information to the system memory.*/
 		fprintf (stderr, "Loading Chinese HZK font from file(%s)..." ,pf->CFont.file);
		if(!(fp = fopen(CFont[hzk_id(pf)].file, "rb"))) 
		{
   		  	fprintf (stderr, "Error.\nThe Chinese HZK font file can not be found!\n");
   	    	 	return FALSE;
    		}
	    	if(fread(CFont[hzk_id(pf)].pFont, sizeof(char), pf->CFont.size, fp) < pf->CFont.size) 
		{
	      	  	fprintf (stderr, "Error in reading Chinese HZK font file!\n");
	 	     	fclose(fp);
 	       		return FALSE;
		}

		fclose(fp);

		CFont[hzk_id(pf)].use_count=0;

		fprintf (stderr, "done.\n" );

	}
	cfont_address = CFont[hzk_id(pf)].pFont;
	pf->cfont_address = CFont[hzk_id(pf)].pFont;
	pf->CFont.pFont = CFont[hzk_id(pf)].pFont;

	CFont[hzk_id(pf)].use_count++;

	if(!GetAFontInfo(pf))
	{
	       fprintf (stderr, "Get ASCII HZK font info failure!\n");
	       return FALSE;
	}
    	if(AFont[hzk_id(pf)].pFont == NULL)	/* check font cache*/
	{
		
 		
 		/* Allocate system memory for ASCII font.*/
 		if( !(AFont[hzk_id(pf)].pFont = (char *)malloc(pf->AFont.size)) )
 		{
 		       	fprintf (stderr, "Allocate memory for ASCII HZK font failure.\n");
 		       	free(CFont[hzk_id(pf)].pFont);
 		       	CFont[hzk_id(pf)].pFont = NULL;
			return FALSE;
 		}
 	
	 	/* Load ASCII font information to the near memory.*/
 		fprintf (stderr, "Loading ASCII HZK font..." );
 		if(!(fp = fopen(AFont[hzk_id(pf)].file, "rb"))) 
		{
 		       	fprintf (stderr, "Error.\nThe ASCII HZK font file can not be found!\n");
 		       	return FALSE;
 		}
	 	if(fread(AFont[hzk_id(pf)].pFont, sizeof(char), pf->AFont.size, fp) < pf->AFont.size) 
		{
 		       	fprintf (stderr, "Error in reading ASCII HZK font file!\n");
 		       	fclose(fp);
 		       	return FALSE;
	 	}
 	
 		fclose(fp);
 	
		AFont[hzk_id(pf)].use_count=0;

		fprintf (stderr, "done.\n" );

  	}
	afont_address = AFont[hzk_id(pf)].pFont;
	pf->afont_address = AFont[hzk_id(pf)].pFont;
	pf->AFont.pFont = AFont[hzk_id(pf)].pFont;

	AFont[hzk_id(pf)].use_count++;

  	return TRUE;
}

/* This function unload system font from memory.*/
static void UnloadFont( PMWHZKFONT pf )
{
	CFont[hzk_id(pf)].use_count--;
	AFont[hzk_id(pf)].use_count--;

	if (!CFont[hzk_id(pf)].use_count)
	{	
	    	free(pf->CFont.pFont);
	    	free(pf->AFont.pFont);

	    	CFont[hzk_id(pf)].pFont = NULL;
	    	AFont[hzk_id(pf)].pFont = NULL;
	}
}

static int
hzk_init(PSD psd)
{
	/* FIXME: *.KU file should be opened and
	 * read in here...*/
	return 1;
}

static PMWHZKFONT
hzk_createfont(const char *name, MWCOORD height, int attr)
{
	PMWHZKFONT	pf;

	if(strcmp(name,"HZKFONT")!=0 && strcmp(name,"HZXFONT")!=0)
		return FALSE;

	/*printf("hzk_createfont(%s,%d)\n",name,height);*/

	use_big5=name[2]-'K';

	/* allocate font structure*/
	pf = (PMWHZKFONT)calloc(sizeof(MWHZKFONT), 1);
	if (!pf)
		return NULL;
	pf->fontprocs = &hzk_procs;

	pf->fontsize=height;
#if 0
	GdSetFontSize((PMWFONT)pf, height);
#endif
	GdSetFontRotation((PMWFONT)pf, 0);
	GdSetFontAttr((PMWFONT)pf, attr, 0);

	if(height==12)
	{		
		afont_width = 6;
		cfont_width = 12;
		font_height = 12;

		pf->afont_width = 6;
		pf->cfont_width = 12;
		pf->font_height = 12;
	}
	else 	
	{		
		afont_width = 8;
		cfont_width = 16;
		font_height = 16;

		pf->afont_width = 8;
		pf->cfont_width = 16;
		pf->font_height = 16;
	}

    	/* Load the font library to the system memory.*/
	if(!LoadFont(pf))
  	      	return FALSE;

	return pf;
}

int IsBig5(int i)
{
	if ((i>=0xa140 && i<=0xa3bf) || /* a140-a3bf(!a3e0) */
	    (i>=0xa440 && i<=0xc67e) || /* a440-c67e        */
	    (i>=0xc6a1 && i<=0xc8d3) || /* c6a1-c8d3(!c8fe) */
	    (i>=0xc940 && i<=0xf9fe))   /* c940-f9fe        */
		return 1;
	else
		return 0;
}

/*
 * following several function is used in hzk_drawtext
 */

static int getnextchar(char* s, unsigned char* cc)
{
    	if( s[0] == '\0') return 0;

    	cc[0] = (unsigned char)(*s);
    	cc[1] = (unsigned char)(*(s + 1));

    	if (use_big5)
    	{
		if( IsBig5( (int) ( (cc[0] << 8) + cc[1]) ) )
			return 1;
    	}
    	else