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Diffstat (limited to 'libX11/src/Text16.c')
| -rw-r--r-- | libX11/src/Text16.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/libX11/src/Text16.c b/libX11/src/Text16.c new file mode 100644 index 000000000..96d5911d6 --- /dev/null +++ b/libX11/src/Text16.c @@ -0,0 +1,154 @@ +/* $Xorg: Text16.c,v 1.4 2001/02/09 02:03:37 xorgcvs Exp $ */ +/* + +Copyright 1986, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + +*/ +/* $XFree86: xc/lib/X11/Text16.c,v 1.5 2001/12/14 19:54:07 dawes Exp $ */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include "Xlibint.h" + +int +XDrawString16( + register Display *dpy, + Drawable d, + GC gc, + int x, + int y, + _Xconst XChar2b *string, + int length) +{ + int Datalength = 0; + register xPolyText16Req *req; + + if (length <= 0) + return 0; + + LockDisplay(dpy); + FlushGC(dpy, gc); + GetReq (PolyText16, req); + req->drawable = d; + req->gc = gc->gid; + req->x = x; + req->y = y; + + + Datalength += SIZEOF(xTextElt) * ((length + 253) / 254) + (length << 1); + + + req->length += (Datalength + 3)>>2; /* convert to number of 32-bit words */ + + + /* + * If the entire request does not fit into the remaining space in the + * buffer, flush the buffer first. If the request does fit into the + * empty buffer, then we won't have to flush it at the end to keep + * the buffer 32-bit aligned. + */ + + if (dpy->bufptr + Datalength > dpy->bufmax) + _XFlush (dpy); + + { + int nbytes; + int PartialNChars = length; + register xTextElt *elt; + XChar2b *CharacterOffset = (XChar2b *)string; + + while(PartialNChars > 254) + { + nbytes = 254 * 2 + SIZEOF(xTextElt); + BufAlloc (xTextElt *, elt, nbytes); + elt->delta = 0; + elt->len = 254; +#if defined(MUSTCOPY) || defined(MUSTCOPY2B) + { + register int i; + register unsigned char *cp; + for (i = 0, cp = ((unsigned char *)elt) + 2; i < 254; i++) { + *cp++ = CharacterOffset[i].byte1; + *cp++ = CharacterOffset[i].byte2; + } + } +#else + memcpy (((char *) elt) + 2, (char *)CharacterOffset, 254 * 2); +#endif + PartialNChars = PartialNChars - 254; + CharacterOffset += 254; + } + + if (PartialNChars) + { + nbytes = PartialNChars * 2 + SIZEOF(xTextElt); + BufAlloc (xTextElt *, elt, nbytes); + elt->delta = 0; + elt->len = PartialNChars; +#if defined(MUSTCOPY) || defined(MUSTCOPY2B) + { + register int i; + register unsigned char *cp; + for (i = 0, cp = ((unsigned char *)elt) + 2; i < PartialNChars; + i++) { + *cp++ = CharacterOffset[i].byte1; + *cp++ = CharacterOffset[i].byte2; + } + } +#else + memcpy(((char *)elt) + 2, (char *)CharacterOffset, PartialNChars * 2); +#endif + } + } + + /* Pad request out to a 32-bit boundary */ + + if (Datalength &= 3) { + char *pad; + /* + * BufAlloc is a macro that uses its last argument more than + * once, otherwise I'd write "BufAlloc (char *, pad, 4-length)" + */ + length = 4 - Datalength; + BufAlloc (char *, pad, length); + /* + * if there are 3 bytes of padding, the first byte MUST be 0 + * so the pad bytes aren't mistaken for a final xTextElt + */ + *pad = 0; + } + + /* + * If the buffer pointer is not now pointing to a 32-bit boundary, + * we must flush the buffer so that it does point to a 32-bit boundary + * at the end of this routine. + */ + + if ((dpy->bufptr - dpy->buffer) & 3) + _XFlush (dpy); + UnlockDisplay(dpy); + SyncHandle(); + return 0; +} + |