nanogui: drivers/genfont.c for HAVE_BIG5_SUPPORT
Subject:
drivers/genfont.c for HAVE_BIG5_SUPPORT
From:
####@####.####
Date:
17 Aug 2000 03:53:34 -0000
Message-Id: <005801c007ff$595261c0$1b0448c0@gv.com.tw>
drivers/genfont.c for HAVE_BIG5_SUPPORT
/*
* Generalized low level routine to calc bounding box for text output.
* Handles both fixed and proportional fonts. Passed ascii string.
*/
void
gen_gettextsize(PMWFONT pfont, const void *text, int cc,
MWCOORD *pwidth, MWCOORD *pheight, MWCOORD *pbase)
{
PMWCFONT pf = ((PMWCOREFONT)pfont)->cfont;
const unsigned char * str = text;
unsigned int c;
int width;
if(pf->width == NULL)
width = cc * pf->maxwidth;
else {
width = 0;
while(--cc >= 0) {
c = *str++;
+#if HAVE_BIG5_SUPPORT
+ /* chinese big5 decoding*/
+ if (c >= 0xA1 && c <= 0xF9 && cc >= 1 &&
+ ((*str >= 0x40 && *str <= 0x7E) ||
+ (*str >= 0xA1 && *str <= 0xFE)) ) {
+ --cc;
+ ++str;
+ width += 12; /* FIXME*/
+ } else
+#endif
#if HAVE_GB2312_SUPPORT
/* chinese gb2312 decoding*/
if (c >= 0xA1 && c < 0xF8 && cc >= 1 &&
*str >= 0xA1 && *str < 0xFF) {
--cc;
++str;
width += 12; /* FIXME*/
} else
#endif
if(c >= pf->firstchar && c < pf->firstchar+pf->size)
width += pf->width[c - pf->firstchar];
}
}
*pwidth = width;
*pheight = pf->height;
*pbase = pf->ascent;
}
/*
* Generalized low level routine to get the bitmap associated
* with a character. Handles fixed and proportional fonts.
*/
void
gen_gettextbits(PMWFONT pfont, int ch, MWIMAGEBITS *retmap,
MWCOORD *pwidth, MWCOORD *pheight, MWCOORD *pbase)
{
PMWCFONT pf = ((PMWCOREFONT)pfont)->cfont;
int n, count, width;
MWIMAGEBITS * bits;
+#if HAVE_BIG5_SUPPORT
+ /* decode chinese big5*/
+ int CH = ((unsigned int)ch) >> 8, CL = ((unsigned int)ch) & 0xFF;
+ if (CH >= 0xA1 && CH <= 0xF9 && ((CL >= 0x40 && CL <= 0x7E) || (CL >= 0xA1 && CL <= 0xFE)) )
+ {
+ int Pos;//!= ((CH - 0xA1) * 94 + (CL - 0xA1)) * 18;
+
+ int i;
+ extern unsigned char JMT_BIG5_12X12_FONT_BITMAP[];
+
+ int seq;
+ {
+ seq=0;
+ /* ladd=loby-(if(loby<127)?64:98) */
+ CL/*c2*/-=(CL/*c2*/<127?64:98);
+
+ /* hadd=(hiby-164)*157 */
+ if (CH/*c1*/>=0xa4)//standard font
+ {
+ seq=(((CH/*c1*/-164)*157)+CL/*c2*/);
+ if (seq>=5809) seq-=408;
+ }
+
+ /* hadd=(hiby-161)*157 */
+ if (CH/*c1*/<=0xa3)//special font
+ seq=(((CH/*c1*/-161)*157)+CL/*c2*/)+13094;
+ }
+ Pos=seq*18;
+
+ *pwidth = width = 12;
+ *pheight = 12;
+ *pbase = 0;
+
+ for (i = 0; i < 6; i++) {
+ unsigned char *DstBitmap = ((unsigned char *)retmap) + i * 4;
+ unsigned char *FontBitmap = JMT_BIG5_12X12_FONT_BITMAP +
+ Pos + i * 3;
+ DstBitmap[0] = FontBitmap[1];
+ DstBitmap[1] = FontBitmap[0];
+ DstBitmap[2] = FontBitmap[1] << 4;
+ DstBitmap[3] = FontBitmap[2];
+ }
+ return;
+ }
+#endif /* HAVE_BIG5_SUPPORT*/
#if HAVE_GB2312_SUPPORT
/* decode chinese gb2312*/
int CH = ((unsigned int)ch) >> 8, CL = ((unsigned int)ch) & 0xFF;
if (CH >= 0xA1 && CH < 0xF8 && CL >= 0xA1 && CL < 0xFF) {
int Pos = ((CH - 0xA1) * 94 + (CL - 0xA1)) * 18;
int i;
extern unsigned char GUO_GB2312_12X12_FONT_BITMAP[];
*pwidth = width = 12;
*pheight = 12;
*pbase = 0;
for (i = 0; i < 6; i++) {
unsigned char *DstBitmap = ((unsigned char *)retmap) + i * 4;
unsigned char *FontBitmap = GUO_GB2312_12X12_FONT_BITMAP +
Pos + i * 3;
DstBitmap[0] = FontBitmap[1];
DstBitmap[1] = FontBitmap[0];
DstBitmap[2] = FontBitmap[1] << 4;
DstBitmap[3] = FontBitmap[2];
}
return;
}
#endif /* HAVE_GB2312_SUPPORT*/
/* if char not in font, map to first character by default*/
if(ch < pf->firstchar || ch >= pf->firstchar+pf->size)
ch = pf->firstchar;
ch -= pf->firstchar;
/* get font bitmap depending on fixed pitch or not*/
bits = pf->bits + (pf->offset? pf->offset[ch]: (pf->height * ch));
width = pf->width ? pf->width[ch] : pf->maxwidth;
count = MWIMAGE_WORDS(width) * pf->height;
for(n=0; n<count; ++n)
*retmap++ = *bits++;
/* return width depending on fixed pitch or not*/
*pwidth = width;
*pheight = pf->height;
*pbase = pf->ascent;
}
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