xenocara/app/xfs/difs/charinfo.c
2006-11-26 14:43:35 +00:00

640 lines
17 KiB
C

/* $Xorg: charinfo.c,v 1.4 2001/02/09 02:05:42 xorgcvs Exp $ */
/*
Copyright 1990, 1991, 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.
* Copyright 1990, 1991 Network Computing Devices;
* Portions Copyright 1987 by Digital Equipment Corporation
*
* 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, and that the names of Network Computing Devices, or Digital
* not be used in advertising or publicity pertaining to distribution
* of the software without specific, written prior permission.
*
* NETWORK COMPUTING DEVICES, AND DIGITAL DISCLAIM ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL NETWORK COMPUTING DEVICES,
* OR DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
* THIS SOFTWARE.
*/
/*
* Defines GetExtents() and GetBitmaps(), which are
* called from routines in fontinfo.c.
* This file was once on the other side of
* the font library interface as util/fsfuncs.c.
*/
/* $XFree86: xc/programs/xfs/difs/charinfo.c,v 1.11 2001/10/28 03:34:34 tsi Exp $ */
#include <X11/Xos.h>
#include "misc.h"
#include <X11/fonts/fontstruct.h>
#include <X11/fonts/fontutil.h>
#include "clientstr.h"
#define FSMD_H
#include <X11/fonts/FSproto.h>
#include "difs.h"
extern void TwoByteSwap(unsigned char *, int);
extern void FourByteSwap(unsigned char *, int);
#define GLWIDTHBYTESPADDED(bits,nbytes) \
((nbytes) == 1 ? (((bits)+7)>>3) /* pad to 1 byte */ \
:(nbytes) == 2 ? ((((bits)+15)>>3)&~1) /* pad to 2 bytes */ \
:(nbytes) == 4 ? ((((bits)+31)>>3)&~3) /* pad to 4 bytes */ \
:(nbytes) == 8 ? ((((bits)+63)>>3)&~7) /* pad to 8 bytes */ \
: 0)
#define GLYPH_SIZE(ch, nbytes) \
GLWIDTHBYTESPADDED((ch)->metrics.rightSideBearing - \
(ch)->metrics.leftSideBearing, (nbytes))
#define n2dChars(pfi) (((pfi)->lastRow - (pfi)->firstRow + 1) * \
((pfi)->lastCol - (pfi)->firstCol + 1))
#if 0
static CharInfoRec junkDefault;
#endif
typedef int (*MetricsFunc)(FontPtr, unsigned long, unsigned char *,
FontEncoding, unsigned long *, CharInfoPtr *);
static int
getCharInfos (
FontPtr pfont,
int num_ranges,
fsRange *range,
Bool ink_metrics,
int *nump, /* return */
CharInfoPtr **retp) /* return */
{
CharInfoPtr *xchars, *xci;
int nchars;
FontInfoPtr pinfo = &pfont->info;
unsigned int r, c;
unsigned char ch[2];
int firstCol = pinfo->firstCol;
int firstRow = pinfo->firstRow;
int lastRow = pinfo->lastRow;
int lastCol = pinfo->lastCol;
fsRange local_range, *rp;
int i;
FontEncoding encoding;
int err;
unsigned long glyphCount;
unsigned short defaultCh;
CharInfoPtr defaultPtr;
MetricsFunc metrics_func;
/*
* compute nchars
*/
if (num_ranges == 0) {
if (lastRow)
nchars = n2dChars(pinfo);
else
nchars = lastCol - firstCol + 1;
local_range.min_char_low = firstCol;
local_range.min_char_high = firstRow;
local_range.max_char_low = lastCol;
local_range.max_char_high = lastRow;
range = &local_range;
num_ranges = 1;
} else {
nchars = 0;
for (i = 0, rp = range; i < num_ranges; i++, rp++) {
if (rp->min_char_high > rp->max_char_high ||
rp->min_char_low > rp->max_char_low)
return BadCharRange;
nchars += (rp->max_char_high - rp->min_char_high + 1) *
(rp->max_char_low - rp->min_char_low + 1);
}
}
xchars = (CharInfoPtr *) fsalloc (sizeof (CharInfoPtr) * nchars);
if (!xchars)
return AllocError;
bzero (xchars, sizeof (CharInfoPtr) * nchars);
if (ink_metrics)
metrics_func = (MetricsFunc)pfont->get_metrics;
else
metrics_func = pfont->get_glyphs;
xci = xchars;
encoding = Linear16Bit;
if (lastRow)
encoding = TwoD16Bit;
defaultCh = pinfo->defaultCh;
ch[0] = defaultCh >> 8;
ch[1] = defaultCh & 0xff;
/* get the default character */
(*metrics_func) (pfont, 1, ch, encoding,
&glyphCount, &defaultPtr);
if (glyphCount != 1)
defaultPtr = 0;
/* for each range, get each character individually, undoing the
default character substitution so we get zero metrics for
non-existent characters. */
for (i = 0, rp = range; i < num_ranges; i++, rp++) {
for (r = rp->min_char_high; r <= rp->max_char_high; r++)
{
for (c = rp->min_char_low; c <= rp->max_char_low; c++) {
ch[0] = r;
ch[1] = c;
err = (*metrics_func) (pfont, 1, ch, encoding,
&glyphCount, xci);
if (err != Successful)
{
fsfree (xchars);
return err;
}
#if 0
if (glyphCount != 1 ||
(*xci == defaultPtr && defaultCh != ((r<<8)+c)))
*xci = &junkDefault;
#endif
xci++;
}
}
}
*retp = xchars;
*nump = nchars;
return Successful;
}
int
GetExtents(
ClientPtr client,
FontPtr pfont,
Mask flags,
unsigned long num_ranges,
fsRange *range,
unsigned long *num_extents, /* return */
fsXCharInfo **data) /* return */
{
unsigned long size;
fsXCharInfo *ci;
fsXCharInfo cilocal;
char *pci;
CharInfoPtr *xchars, *xchars_cur;
CharInfoPtr xci;
int nchars;
int err;
if (flags & LoadAll)
num_ranges = 0;
err = getCharInfos (pfont, num_ranges, range,
client->major_version > 1 ? TRUE : FALSE,
&nchars, &xchars);
if (err != Successful)
return err;
size = SIZEOF(fsXCharInfo) * nchars;
pci = (char *) fsalloc(size);
if (!pci) {
fsfree (xchars);
return AllocError;
}
ci = (fsXCharInfo *) pci;
*num_extents = nchars;
/* pack the data */
xchars_cur = xchars;
while (nchars--) {
xci = *xchars_cur++;
cilocal.ascent = xci->metrics.ascent;
cilocal.descent = xci->metrics.descent;
cilocal.left = xci->metrics.leftSideBearing;
cilocal.right = xci->metrics.rightSideBearing;
cilocal.width = xci->metrics.characterWidth;
cilocal.attributes = xci->metrics.attributes;
memcpy(pci, &cilocal, SIZEOF(fsXCharInfo));
pci += SIZEOF(fsXCharInfo);
}
fsfree (xchars);
*data = ci;
return Successful;
}
static int
packGlyphs (
ClientPtr client,
FontPtr pfont,
int format,
Mask flags,
unsigned long num_ranges,
fsRange *range,
int *tsize,
unsigned long *num_glyphs,
fsOffset32 **offsets,
pointer *data,
int *freeData)
{
int i;
fsOffset32 *lengths, *l;
unsigned long size = 0;
pointer gdata;
unsigned char *gd;
int bitorder, byteorder, scanlinepad, scanlineunit, mappad;
int height = 0, dstbpr = 0, charsize = 0;
int dst_off = 0, src_off;
Bool contiguous, reformat;
int nchars;
int src_glyph_pad = pfont->glyph;
int src_bit_order = pfont->bit;
int src_byte_order = pfont->byte;
int err;
int max_ascent = 0, max_descent = 0;
int min_left = 0, max_right;
int srcbpr;
int lshift = 0, rshift = 0, dst_left_bytes = 0, src_left_bytes = 0;
unsigned char *srcp;
unsigned char *dstp;
unsigned char bits1, bits2;
int width;
int src_extra;
int dst_extra;
int r, w;
CharInfoPtr *bitChars, *bitCharsFree, bitc;
CharInfoPtr *inkChars, *inkCharsFree = 0, inkc;
FontInfoPtr pinfo = &pfont->info;
xCharInfo *bitm, *inkm;
err = CheckFSFormat(format, (fsBitmapFormatMask) ~ 0,
&bitorder, &byteorder, &scanlineunit, &scanlinepad, &mappad);
if (err != Successful)
return err;
if (flags & LoadAll)
num_ranges = 0;
err = getCharInfos (pfont, num_ranges, range, FALSE, &nchars, &bitCharsFree);
if (err != Successful)
return err;
/* compute dstbpr for padded out fonts */
reformat = bitorder != src_bit_order || byteorder != src_byte_order;
/* we need the ink metrics when shrink-wrapping a TE font (sigh),
* but only for protocol version > 1 */
if (mappad != BitmapFormatImageRectMax &&
pinfo->inkMetrics &&
client->major_version > 1)
{
err = getCharInfos (pfont, num_ranges, range, TRUE, &nchars, &inkCharsFree);
if (err != Successful)
{
fsfree (bitCharsFree);
return err;
}
reformat = TRUE;
}
/* get space for glyph offsets */
lengths = (fsOffset32 *) fsalloc(SIZEOF(fsOffset32) * nchars);
if (!lengths) {
fsfree (bitCharsFree);
fsfree (inkCharsFree);
return AllocError;
}
switch (mappad)
{
case BitmapFormatImageRectMax:
max_ascent = FONT_MAX_ASCENT(pinfo);
max_descent = FONT_MAX_DESCENT(pinfo);
height = max_ascent + max_descent;
/* do font ascent and font descent match bitmap bounds ? */
if (height != pinfo->minbounds.ascent + pinfo->minbounds.descent)
reformat = TRUE;
/* fall through */
case BitmapFormatImageRectMaxWidth:
min_left = FONT_MIN_LEFT(pinfo);
max_right = FONT_MAX_RIGHT(pinfo);
if (min_left != pinfo->maxbounds.leftSideBearing)
reformat = TRUE;
if (max_right != pinfo->maxbounds.rightSideBearing)
reformat = TRUE;
dstbpr = GLWIDTHBYTESPADDED(max_right - min_left, scanlinepad);
break;
case BitmapFormatImageRectMin:
break;
}
if (mappad == BitmapFormatImageRectMax)
charsize = dstbpr * height;
size = 0;
gdata = 0;
contiguous = TRUE;
l = lengths;
inkChars = inkCharsFree;
bitChars = bitCharsFree;
for (i = 0; i < nchars; i++)
{
inkc = bitc = *bitChars++;
/* when ink metrics != bitmap metrics, use ink metrics */
if (inkChars)
inkc = *inkChars++;
l->position = size;
/*
* Do not repad characters with no bits except for those
* with non-zero width.
*/
if (bitc && (bitc->bits || bitc->metrics.characterWidth)) {
if (!gdata)
gdata = (pointer) bitc->bits;
if ((char *) gdata + size != bitc->bits)
contiguous = FALSE;
if (mappad == BitmapFormatImageRectMin)
dstbpr = GLYPH_SIZE(inkc, scanlinepad);
if (dstbpr != GLYPH_SIZE(bitc, src_glyph_pad)) reformat = TRUE;
if (mappad != BitmapFormatImageRectMax)
{
height = inkc->metrics.ascent + inkc->metrics.descent;
charsize = height * dstbpr;
}
l->length = charsize;
size += charsize;
}
else
l->length = 0;
l++;
}
if (contiguous && !reformat)
{
*num_glyphs = nchars;
*freeData = FALSE;
*data = gdata;
*tsize = size;
*offsets = lengths;
fsfree (bitCharsFree);
fsfree (inkCharsFree);
return Successful;
}
if (size)
{
gdata = (pointer) fsalloc(size);
if (!gdata) {
fsfree (bitCharsFree);
fsfree (inkCharsFree);
fsfree (lengths);
return AllocError;
}
bzero ((char *) gdata, size);
}
else
gdata = NULL;
*freeData = TRUE;
l = lengths;
gd = gdata;
/* finally do the work */
bitChars = bitCharsFree;
inkChars = inkCharsFree;
for (i = 0; i < nchars; i++, l++)
{
inkc = bitc = *bitChars++;
if (inkChars)
inkc = *inkChars++;
/* ignore missing chars */
if (l->length == 0)
continue;
bitm = &bitc->metrics;
inkm = &inkc->metrics;
/* start address for the destination of bits for this char */
dstp = gd;
if (mappad == BitmapFormatImageRectMax)
height = max_ascent + max_descent;
else
height = inkm->ascent + inkm->descent;
/* adjust destination and calculate shift offsets */
switch (mappad) {
case BitmapFormatImageRectMax:
/* leave the first padded rows blank */
if (max_ascent > inkm->ascent)
{
height -= (max_ascent - inkm->ascent);
dstp += dstbpr * (max_ascent - inkm->ascent);
}
if (max_descent > inkm->descent)
{
height -= (max_descent - inkm->descent);
}
/* fall thru */
case BitmapFormatImageRectMaxWidth:
dst_off = inkm->leftSideBearing - min_left;
if (dst_off < 0) dst_off = 0;
break;
case BitmapFormatImageRectMin:
dst_off = 0;
dstbpr = GLYPH_SIZE(inkc, scanlinepad);
break;
}
srcbpr = GLYPH_SIZE (bitc, src_glyph_pad);
srcp = (unsigned char *) bitc->bits;
/* adjust source */
src_off = 0;
if (inkm != bitm)
{
srcp += (bitm->ascent - inkm->ascent) * srcbpr;
src_off = inkm->leftSideBearing - bitm->leftSideBearing;
}
dst_left_bytes = dst_off >> 3;
dst_off &= 7;
src_left_bytes = src_off >> 3;
src_off &= 7;
/* minimum of source/dest bytes per row */
width = srcbpr - src_left_bytes;
if (width > dstbpr - dst_left_bytes)
width = dstbpr - dst_left_bytes;
/* extra bytes in source and dest for padding */
src_extra = srcbpr - width - src_left_bytes;
dst_extra = dstbpr - width - dst_left_bytes;
#define MSBBitLeft(b,c) ((b) << (c))
#define MSBBitRight(b,c) ((b) >> (c))
#define LSBBitLeft(b,c) ((b) >> (c))
#define LSBBitRight(b,c) ((b) << (c))
if (dst_off == src_off)
{
if (srcbpr == dstbpr && src_left_bytes == dst_left_bytes)
{
r = height * srcbpr;
memmove( dstp, srcp, r);
dstp += r;
}
else
{
for (r = height; r; r--)
{
dstp += dst_left_bytes;
srcp += src_left_bytes;
for (w = width; w; w--)
*dstp++ = *srcp++;
dstp += dst_extra;
srcp += src_extra;
}
}
}
else
{
if (dst_off > src_off)
{
rshift = dst_off - src_off;
lshift = 8 - rshift;
}
else
{
lshift = src_off - dst_off;
rshift = 8 - lshift;
/* run the loop one fewer time if necessary */
if (src_extra <= dst_extra)
{
dst_extra++;
width--;
}
else
src_extra--;
}
for (r = inkm->ascent + inkm->descent; r; r--)
{
dstp += dst_left_bytes;
srcp += src_left_bytes;
bits2 = 0;
/* fetch first part of source when necessary */
if (dst_off < src_off)
bits2 = *srcp++;
/*
* XXX I bet this does not work when
* src_bit_order != src_byte_order && scanlineunit > 1
*/
for (w = width; w; w--)
{
bits1 = *srcp++;
if (src_bit_order == MSBFirst)
{
*dstp++ = MSBBitRight(bits1, rshift) |
MSBBitLeft (bits2, lshift);
}
else
{
*dstp++ = LSBBitRight(bits1, rshift) |
LSBBitLeft (bits2, lshift);
}
bits2 = bits1;
}
/* get the last few bits if we have a place to store them */
if (dst_extra > 0)
{
if (src_bit_order == MSBFirst)
*dstp = MSBBitLeft (bits2, lshift);
else
*dstp = LSBBitLeft (bits2, lshift);
}
dstp += dst_extra;
srcp += src_extra;
}
}
/* skip the amount we just filled in */
gd += l->length;
}
/* now do the bit, byte, word swapping */
if (bitorder != src_bit_order)
BitOrderInvert(gdata, size);
if (byteorder != src_byte_order)
{
if (scanlineunit == 2)
TwoByteSwap(gdata, size);
else if (scanlineunit == 4)
FourByteSwap(gdata, size);
}
fsfree (bitCharsFree);
fsfree (inkCharsFree);
*num_glyphs = nchars;
*data = gdata;
*tsize = size;
*offsets = lengths;
return Successful;
}
/* ARGSUSED */
int
GetBitmaps(
ClientPtr client,
FontPtr pfont,
fsBitmapFormat format,
Mask flags,
unsigned long num_ranges,
fsRange *range,
int *size,
unsigned long *num_glyphs,
fsOffset32 **offsets,
pointer *data,
int *freeData)
{
int err;
assert(pfont);
*size = 0;
*data = (pointer) 0;
err = LoadGlyphRanges(client, pfont, TRUE, num_ranges * 2, 0,
(fsChar2b *)range);
if (err != Successful)
return err;
return packGlyphs (client, pfont, format, flags,
num_ranges, range, size, num_glyphs,
offsets, data, freeData);
}