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pdfdev.c
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pdfdev.c
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/* This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
Copyright (C) 2002-2015 by Jin-Hwan Cho and Shunsaku Hirata,
the dvipdfmx project team.
Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "libtexpdf.h"
int compat_mode = 0;
static int verbose = 0;
void
texpdf_dev_set_verbose (void)
{
verbose++;
}
const char*
texpdf_library_version(void)
{
return PACKAGE_VERSION;
}
/* Not working yet... */
double
texpdf_dev_scale (void)
{
return 1.0;
}
/*
* Unit conversion, formatting and others.
*/
#define TEX_ONE_HUNDRED_BP 6578176
static struct {
double dvi2pts;
long min_bp_val; /* Shortest resolvable distance in the output PDF. */
int precision; /* Number of decimal digits (in fractional part) kept. */
} dev_unit = {
0.0,
658,
2
};
double
dev_unit_dviunit (void)
{
return (1.0/dev_unit.dvi2pts);
}
#define DEV_PRECISION_MAX 8
static unsigned long ten_pow[10] = {
1ul, 10ul, 100ul, 1000ul, 10000ul, 100000ul, 1000000ul, 10000000ul, 100000000ul, 1000000000ul
};
static double ten_pow_inv[10] = {
1.0, 0.1, 0.01, 0.001, 0.0001, 0.00001, 0.000001, 0.0000001, 0.00000001, 0.000000001
};
#define bpt2spt(b) ( (spt_t) round( (b) / dev_unit.dvi2pts ) )
#define spt2bpt(s) ( (s) * dev_unit.dvi2pts )
#define dround_at(v,p) (ROUND( (v), ten_pow_inv[(p)] ))
static int
p_itoa (long value, char *buf)
{
int sign, ndigits;
char *p = buf;
if (value < 0) {
*p++ = '-';
value = -value;
sign = 1;
} else {
sign = 0;
}
ndigits = 0;
/* Generate at least one digit in reverse order */
do {
p[ndigits++] = (value % 10) + '0';
value /= 10;
} while (value != 0);
/* Reverse the digits */
{
int i;
for (i = 0; i < ndigits / 2 ; i++) {
char tmp = p[i];
p[i] = p[ndigits-i-1];
p[ndigits-i-1] = tmp;
}
}
p[ndigits] = '\0';
return (sign ? ndigits + 1 : ndigits);
}
/* NOTE: Acrobat 5 and prior uses 16.16 fixed point representation for
* real numbers.
*/
static int
p_dtoa (double value, int prec, char *buf)
{
const long p[10] = { 1, 10, 100, 1000, 10000,
100000, 1000000, 10000000,
100000000, 1000000000 };
double i, f;
long g;
char *c = buf;
int n;
if (value < 0) {
value = -value;
*c++ = '-';
n = 1;
} else {
n = 0;
}
f = modf(value, &i);
g = (long) (f * p[prec] + 0.5);
if (g == p[prec]) {
g = 0;
i += 1;
}
if (i) {
int m = sprintf(c, "%.0f", i);
c += m;
n += m;
} else if (g == 0) {
*(c = buf) = '0';
n = 1;
}
if (g) {
int j = prec;
*c++ = '.';
while (j--) {
c[j] = (g % 10) + '0';
g /= 10;
}
c += prec - 1;
n += 1 + prec;
while (*c == '0') {
c--;
n--;
}
}
*(++c) = 0;
return n;
}
static int
dev_sprint_bp (char *buf, spt_t value, spt_t *error)
{
double value_in_bp;
double error_in_bp;
int prec = dev_unit.precision;
value_in_bp = spt2bpt(value);
if (error) {
error_in_bp = value_in_bp - dround_at(value_in_bp, prec);
*error = bpt2spt(error_in_bp);
}
return p_dtoa(value_in_bp, prec, buf);
}
/* They are affected by precision (set at device initialization). */
int
texpdf_sprint_matrix (char *buf, const pdf_tmatrix *M)
{
int len;
int prec2 = MIN(dev_unit.precision + 2, DEV_PRECISION_MAX);
int prec0 = MAX(dev_unit.precision, 2);
len = p_dtoa(M->a, prec2, buf);
buf[len++] = ' ';
len += p_dtoa(M->b, prec2, buf+len);
buf[len++] = ' ';
len += p_dtoa(M->c, prec2, buf+len);
buf[len++] = ' ';
len += p_dtoa(M->d, prec2, buf+len);
buf[len++] = ' ';
len += p_dtoa(M->e, prec0, buf+len);
buf[len++] = ' ';
len += p_dtoa(M->f, prec0, buf+len);
buf[len] = '\0'; /* xxx_sprint_xxx NULL terminates strings. */
return len;
}
int
pdf_sprint_rect (char *buf, const pdf_rect *rect)
{
int len;
len = p_dtoa(rect->llx, dev_unit.precision, buf);
buf[len++] = ' ';
len += p_dtoa(rect->lly, dev_unit.precision, buf+len);
buf[len++] = ' ';
len += p_dtoa(rect->urx, dev_unit.precision, buf+len);
buf[len++] = ' ';
len += p_dtoa(rect->ury, dev_unit.precision, buf+len);
buf[len] = '\0'; /* xxx_sprint_xxx NULL terminates strings. */
return len;
}
int
pdf_sprint_coord (char *buf, const pdf_coord *p)
{
int len;
len = p_dtoa(p->x, dev_unit.precision, buf);
buf[len++] = ' ';
len += p_dtoa(p->y, dev_unit.precision, buf+len);
buf[len] = '\0'; /* xxx_sprint_xxx NULL terminates strings. */
return len;
}
int
pdf_sprint_length (char *buf, double value)
{
int len;
len = p_dtoa(value, dev_unit.precision, buf);
buf[len] = '\0'; /* xxx_sprint_xxx NULL terminates strings. */
return len;
}
int
pdf_sprint_number (char *buf, double value)
{
int len;
len = p_dtoa(value, DEV_PRECISION_MAX, buf);
buf[len] = '\0'; /* xxx_sprint_xxx NULL terminates strings. */
return len;
}
static struct
{
/* Text composition (direction) mode is ignored (always same
* as font's writing mode) if autorotate is unset (value zero).
*/
int autorotate;
/*
* Ignore color migrated to here. This is device's capacity.
* colormode 0 for ignore colors
*/
int colormode;
} dev_param = {
1, /* autorotate */
1, /* colormode */
};
/*
* Text handling routines.
*/
/* Motion state:
* GRAPHICS_MODE Initial state (not within BT/ET block nor in string)
* TEXT_MODE Text section is started via BT operator but not
* in string.
* STRING_MODE In string. A string or array of strings are currently
* in process. May started '[', '<' or '('.
*/
#define GRAPHICS_MODE 1
#define TEXT_MODE 2
#define STRING_MODE 3
static int motion_state = GRAPHICS_MODE;
#define FORMAT_BUF_SIZE 4096
static char format_buffer[FORMAT_BUF_SIZE];
/*
* In PDF, vertical text positioning is always applied when current font
* is vertical font. While ASCII pTeX manages current writing direction
* and font's WMode separately.
*
* 000/101 WMODE_HH/VV h(v) font, h(v) direction.
* 001 WMODE_HV -90 deg. rotated
* 100 WMODE_VH +90 deg. rotated
* 011 WMODE_HD +90 deg. rotated
* 111 WMODE_VD 180 deg. rotated
* In MetaPost PostScript file processing (mp_mode = 1), only HH/VV mode
* is applied.
*/
#define TEXT_WMODE_HH 0
#define TEXT_WMODE_HV 1
#define TEXT_WMODE_VH 4
#define TEXT_WMODE_VV 5
#define TEXT_WMODE_HD 3
#define TEXT_WMODE_VD 7
#define ANGLE_CHANGES(m1,m2) ((abs((m1)-(m2)) % 5) == 0 ? 0 : 1)
#define ROTATE_TEXT(m) ((m) != TEXT_WMODE_HH && (m) != TEXT_WMODE_VV)
static struct {
/* Current font.
* This is index within dev_fonts.
*/
int font_id;
/* Dvipdfmx does compression of text by doing text positioning
* in relative motion and uses string array [(foo) -250 (bar)]
* with kerning (negative kern is used for white space as suited
* for TeX). This is offset within current string.
*/
spt_t offset;
/* This is reference point of strings.
* It may include error correction induced by rounding.
*/
spt_t ref_x;
spt_t ref_y;
/* Using text raise and leading is highly recommended for
* text extraction to work properly. But not implemented yet.
* We can't do consice output for \TeX without this.
*/
spt_t raise; /* unused */
spt_t leading; /* unused */
/* This is not always text matrix but rather font matrix.
* We do not use horizontal scaling in PDF text state parameter
* since they always apply scaling in fixed direction regardless
* of writing mode.
*/
struct {
double slant;
double extend;
int rotate; /* TEXT_WMODE_XX */
} matrix;
/* Fake bold parameter:
* If bold_param is positive, use text rendering mode
* fill-then-stroke with stroking line width specified
* by bold_param.
*/
double bold_param;
/* Text composition (direction) mode. */
int dir_mode;
/* internal */
/* Flag indicating text matrix to be forcibly reset.
* Enabled if synthetic font features (slant, extend, etc)
* are used for current font or when text rotation mode
* changes.
*/
int force_reset;
/* This information is duplicated from dev[font_id].format.
* Set to 1 if font is composite (Type0) font.
*/
int is_mb;
} text_state = {
-1, /* font */
0, /* offset */
0, 0, /* ref_x, ref_y */
0, 0, /* raise, leading */
{0.0, 1.0, 0},
0.0, /* Experimental boldness param */
0, /* dir_mode */
/* internal */
0, /* force_reset */
0 /* is_mb */
};
#define PDF_FONTTYPE_SIMPLE 1
#define PDF_FONTTYPE_BITMAP 2
#define PDF_FONTTYPE_COMPOSITE 3
struct dev_font {
/* Needs to be big enough to hold name "Fxxx"
* where xxx is number of largest font
*/
char short_name[7]; /* Resource name */
int used_on_this_page;
char *tex_name; /* String identifier of this font */
spt_t sptsize; /* Point size */
/* Returned values from font/encoding layer:
*
* The font_id and enc_id is font and encoding (CMap) identifier
* used in pdf_font or encoding/cmap layer.
* The PDF object "resource" is an indirect reference object
* pointing font resource of this font. The used_chars is somewhat
* misleading, this is actually used_glyphs in CIDFont for Type0
* and is 65536/8 bytes binary data with each bits representing
* whether the glyph is in-use or not. It is 256 char array for
* simple font.
*/
int font_id;
int enc_id;
/* if >= 0, index of a dev_font that really has the resource and used_chars */
int real_font_index;
pdf_obj *resource;
char *used_chars;
/* Font format:
* simple, composite or bitmap.
*/
int format;
/* Writing mode:
* Non-zero for vertical. Duplicated from CMap.
*/
int wmode;
/* Syntetic Font:
*
* We use text matrix for creating extended or slanted font,
* but not with font's FontMatrix since TrueType and Type0
* font don't support them.
*/
double extend;
double slant;
double bold; /* Boldness prameter */
/* Compatibility */
int mapc; /* Nasty workaround for Omega */
/* There are no font metric format supporting four-bytes
* charcter code. So we should provide an option to specify
* UCS group and plane.
*/
int ucs_group;
int ucs_plane;
int is_unicode;
cff_charsets *cff_charsets;
};
static struct dev_font *dev_fonts = NULL;
static int num_dev_fonts = 0;
static int max_dev_fonts = 0;
static int num_phys_fonts = 0;
#define CURRENTFONT() ((text_state.font_id < 0) ? NULL : &(dev_fonts[text_state.font_id]))
#define GET_FONT(n) (&(dev_fonts[(n)]))
static void
dev_set_text_matrix (pdf_doc *p, spt_t xpos, spt_t ypos, double slant, double extend, int rotate)
{
pdf_tmatrix tm;
int len = 0;
/* slant is negated for vertical font so that right-side
* is always lower. */
switch (rotate) {
case TEXT_WMODE_VH:
/* Vertical font */
tm.a = slant ; tm.b = 1.0;
tm.c = -extend; tm.d = 0.0 ;
break;
case TEXT_WMODE_HV:
/* Horizontal font */
tm.a = 0.0; tm.b = -extend;
tm.c = 1.0; tm.d = -slant ;
break;
case TEXT_WMODE_HH:
/* Horizontal font */
tm.a = extend; tm.b = 0.0;
tm.c = slant ; tm.d = 1.0;
break;
case TEXT_WMODE_VV:
/* Vertical font */
tm.a = 1.0; tm.b = -slant;
tm.c = 0.0; tm.d = extend;
break;
case TEXT_WMODE_HD:
/* Horizontal font */
tm.a = 0.0; tm.b = extend;
tm.c = -1.0; tm.d = slant ;
break;
case TEXT_WMODE_VD:
/* Vertical font */
tm.a = -1.0; tm.b = slant;
tm.c = 0.0; tm.d = -extend;
break;
}
tm.e = xpos * dev_unit.dvi2pts;
tm.f = ypos * dev_unit.dvi2pts;
format_buffer[len++] = ' ';
len += texpdf_sprint_matrix(format_buffer+len, &tm);
format_buffer[len++] = ' ';
format_buffer[len++] = 'T';
format_buffer[len++] = 'm';
texpdf_doc_add_page_content(p, format_buffer, len); /* op: Tm */
text_state.ref_x = xpos;
text_state.ref_y = ypos;
text_state.matrix.slant = slant;
text_state.matrix.extend = extend;
text_state.matrix.rotate = rotate;
}
/*
* reset_text_state() outputs a BT and does any necessary coordinate
* transformations to get ready to ship out text.
*/
static void
reset_text_state (pdf_doc *p)
{
/*
* We need to reset the line matrix to handle slanted fonts.
*/
texpdf_doc_add_page_content(p, " BT", 3); /* op: BT */
/*
* text_state.matrix is identity at top of page.
* This sometimes write unnecessary "Tm"s when transition from
* GRAPHICS_MODE to TEXT_MODE occurs.
*/
if (text_state.force_reset ||
text_state.matrix.slant != 0.0 ||
text_state.matrix.extend != 1.0 ||
ROTATE_TEXT(text_state.matrix.rotate)) {
dev_set_text_matrix(p, 0, 0,
text_state.matrix.slant,
text_state.matrix.extend,
text_state.matrix.rotate);
}
text_state.ref_x = 0;
text_state.ref_y = 0;
text_state.offset = 0;
text_state.force_reset = 0;
}
static void
text_mode (pdf_doc *p)
{
switch (motion_state) {
case TEXT_MODE:
break;
case STRING_MODE:
texpdf_doc_add_page_content(p, text_state.is_mb ? ">]TJ" : ")]TJ", 4); /* op: TJ */
break;
case GRAPHICS_MODE:
reset_text_state(p);
break;
}
motion_state = TEXT_MODE;
text_state.offset = 0;
}
void
texpdf_graphics_mode (pdf_doc *p)
{
switch (motion_state) {
case GRAPHICS_MODE:
break;
case STRING_MODE:
texpdf_doc_add_page_content(p, text_state.is_mb ? ">]TJ" : ")]TJ", 4); /* op: TJ */
/* continue */
case TEXT_MODE:
texpdf_doc_add_page_content(p, " ET", 3); /* op: ET */
text_state.force_reset = 0;
text_state.font_id = -1;
break;
}
motion_state = GRAPHICS_MODE;
}
static void
start_string (pdf_doc *p, spt_t xpos, spt_t ypos, double slant, double extend, int rotate)
{
spt_t delx, dely, error_delx, error_dely;
spt_t desired_delx, desired_dely;
int len = 0;
delx = xpos - text_state.ref_x;
dely = ypos - text_state.ref_y;
/*
* Precompensating for line transformation matrix.
*
* Line transformation matrix L for horizontal font in horizontal
* mode and it's inverse I is
*
* | e 0| | 1/e 0|
* L_hh = | | , I_hh = | |
* | s 1| |-s/e 1|
*
* For vertical font in vertical mode,
*
* | 1 -s| | 1 s/e|
* L_vv = | | , I_vv = | |
* | 0 e| | 0 1/e|
*
* For vertical font in horizontal mode,
*
* | s 1| | 0 1|
* L_vh = | | = L_vv x | |
* |-e 0| |-1 0|
*
* | 0 -1|
* I_vh = | | x I_vv
* | 1 0|
*
* For horizontal font in vertical mode,
*
* | 0 -e| | 0 -1|
* L_hv = | | = L_hh x | |
* | 1 -s| | 1 0|
*
* | 0 1|
* I_hv = | | x I_hh
* |-1 0|
*
*/
switch (rotate) {
case TEXT_WMODE_VH:
/* Vertical font in horizontal mode: rot = +90
* | 0 -1/e|
* d_user = d x I_vh = d x | |
* | 1 s/e|
*/
desired_delx = dely;
desired_dely = (spt_t) (-(delx - dely*slant)/extend);
/* error_del is in device space
*
* | 0 1|
* e = e_user x | | = (-e_user_y, e_user_x)
* |-1 0|
*
* We must care about rotation here but not extend/slant...
* The extend and slant actually is font matrix.
*/
format_buffer[len++] = ' ';
len += dev_sprint_bp(format_buffer+len, desired_delx, &error_dely);
format_buffer[len++] = ' ';
len += dev_sprint_bp(format_buffer+len, desired_dely, &error_delx);
error_delx = -error_delx;
break;
case TEXT_WMODE_HV:
/* Horizontal font in vertical mode: rot = -90
*
* |-s/e 1|
* d_user = d x I_hv = d x | |
* |-1/e 0|
*/
desired_delx = (spt_t)(-(dely + delx*slant)/extend);
desired_dely = delx;
/*
* e = (e_user_y, -e_user_x)
*/
format_buffer[len++] = ' ';
len += dev_sprint_bp(format_buffer+len, desired_delx, &error_dely);
format_buffer[len++] = ' ';
len += dev_sprint_bp(format_buffer+len, desired_dely, &error_delx);
error_dely = -error_dely;
break;
case TEXT_WMODE_HH:
/* Horizontal font in horizontal mode:
* | 1/e 0|
* d_user = d x I_hh = d x | |
* |-s/e 1|
*/
desired_delx = (spt_t)((delx - dely*slant)/extend);
desired_dely = dely;
format_buffer[len++] = ' ';
len += dev_sprint_bp(format_buffer+len, desired_delx, &error_delx);
format_buffer[len++] = ' ';
len += dev_sprint_bp(format_buffer+len, desired_dely, &error_dely);
break;
case TEXT_WMODE_VV:
/* Vertical font in vertical mode:
* | 1 s/e|
* d_user = d x I_vv = d x | |
* | 0 1/e|
*/
desired_delx = delx;
desired_dely = (spt_t)((dely + delx*slant)/extend);
format_buffer[len++] = ' ';
len += dev_sprint_bp(format_buffer+len, desired_delx, &error_delx);
format_buffer[len++] = ' ';
len += dev_sprint_bp(format_buffer+len, desired_dely, &error_dely);
break;
case TEXT_WMODE_HD:
/* Horizontal font in down-to-up mode: rot = +90
*
* | s/e -1|
* d_user = d x -I_hv = d x | |
* | 1/e 0|
*/
desired_delx = -(spt_t)(-(dely + delx*slant)/extend);
desired_dely = -delx;
format_buffer[len++] = ' ';
len += dev_sprint_bp(format_buffer+len, desired_delx, &error_dely);
format_buffer[len++] = ' ';
len += dev_sprint_bp(format_buffer+len, desired_dely, &error_delx);
error_delx = -error_delx;
error_dely = -error_dely;
break;
case TEXT_WMODE_VD:
/* Vertical font in down-to-up mode: rot = 180
* |-1 -s/e|
* d_user = d x -I_vv = d x | |
* | 0 -1/e|
*/
desired_delx = -delx;
desired_dely = -(spt_t)((dely + delx*slant)/extend);
format_buffer[len++] = ' ';
len += dev_sprint_bp(format_buffer+len, desired_delx, &error_delx);
format_buffer[len++] = ' ';
len += dev_sprint_bp(format_buffer+len, desired_dely, &error_dely);
error_delx = -error_delx;
error_dely = -error_dely;
break;
}
texpdf_doc_add_page_content(p, format_buffer, len); /* op: */
/*
* dvipdfm wrongly using "TD" in place of "Td".
* The TD operator set leading, but we are not using T* etc.
*/
texpdf_doc_add_page_content(p, text_state.is_mb ? " Td[<" : " Td[(", 5); /* op: Td */
/* Error correction */
text_state.ref_x = xpos - error_delx;
text_state.ref_y = ypos - error_dely;
text_state.offset = 0;
}
static void
string_mode (pdf_doc *p, spt_t xpos, spt_t ypos, double slant, double extend, int rotate)
{
switch (motion_state) {
case STRING_MODE:
break;
case GRAPHICS_MODE:
reset_text_state(p);
/* continue */
case TEXT_MODE:
if (text_state.force_reset) {
dev_set_text_matrix(p, xpos, ypos, slant, extend, rotate);
texpdf_doc_add_page_content(p, text_state.is_mb ? "[<" : "[(", 2); /* op: */
text_state.force_reset = 0;
} else {
start_string(p, xpos, ypos, slant, extend, rotate);
}
break;
}
motion_state = STRING_MODE;
}
/*
* The purpose of the following routine is to force a Tf only
* when it's actually necessary. This became a problem when the
* VF code was added. The VF spec says to instantiate the
* first font contained in the VF file before drawing a virtual
* character. However, that font may not be used for
* many characters (e.g. small caps fonts). For this reason,
* dev_select_font() should not force a "physical" font selection.
* This routine prevents a PDF Tf font selection until there's
* really a character in that font.
*/
static int
dev_set_font (pdf_doc *doc, int font_id)
{
struct dev_font *font;
struct dev_font *real_font;
int text_rotate;
double font_scale;
int len;
int vert_dir, vert_font;
/* text_mode() must come before text_state.is_mb is changed. */
text_mode(doc);
font = GET_FONT(font_id);
ASSERT(font); /* Caller should check font_id. */
if (font->real_font_index >= 0)
real_font = GET_FONT(font->real_font_index);
else
real_font = font;
text_state.is_mb = (font->format == PDF_FONTTYPE_COMPOSITE) ? 1 : 0;
vert_font = font->wmode ? 1 : 0;
if (dev_param.autorotate) {
vert_dir = text_state.dir_mode;
} else {
vert_dir = vert_font;
}
text_rotate = (vert_font << 2)|vert_dir;
if (font->slant != text_state.matrix.slant ||
font->extend != text_state.matrix.extend ||
ANGLE_CHANGES(text_rotate, text_state.matrix.rotate)) {
text_state.force_reset = 1;
}
text_state.matrix.slant = font->slant;
text_state.matrix.extend = font->extend;
text_state.matrix.rotate = text_rotate;
if (!real_font->resource) {
real_font->resource = texpdf_get_font_reference(real_font->font_id);
real_font->used_chars = texpdf_get_font_usedchars(real_font->font_id);
}
if (!real_font->used_on_this_page) {
texpdf_doc_add_page_resource(doc, "Font",
real_font->short_name,
texpdf_link_obj(real_font->resource));
real_font->used_on_this_page = 1;
}
font_scale = (double) font->sptsize * dev_unit.dvi2pts;
len = sprintf(format_buffer, " /%s", real_font->short_name); /* space not necessary. */
format_buffer[len++] = ' ';
len += p_dtoa(font_scale, MIN(dev_unit.precision+1, DEV_PRECISION_MAX), format_buffer+len);
format_buffer[len++] = ' ';
format_buffer[len++] = 'T';
format_buffer[len++] = 'f';
texpdf_doc_add_page_content(doc, format_buffer, len); /* op: Tf */
if (font->bold > 0.0 || font->bold != text_state.bold_param) {
if (font->bold <= 0.0)
len = sprintf(format_buffer, " 0 Tr");
else
len = sprintf(format_buffer, " 2 Tr %.6f w", font->bold); /* _FIXME_ */
texpdf_doc_add_page_content(doc, format_buffer, len); /* op: Tr w */
}
text_state.bold_param = font->bold;
text_state.font_id = font_id;
return 0;
}
/* Access text state parameters.
*/
#if 0
int
texpdf_dev_currentfont (void)
{
return text_state.font_id;
}
double
texpdf_dev_get_font_ptsize (int font_id)
{
struct dev_font *font;
font = GET_FONT(font_id);
if (font) {
return font->sptsize * dev_unit.dvi2pts;
}
return 1.0;
}
#endif
int
texpdf_dev_get_font_wmode (int font_id)
{
struct dev_font *font;
font = GET_FONT(font_id);
if (font) {
return font->wmode;
}
return 0;
}
static unsigned char sbuf0[FORMAT_BUF_SIZE];
static unsigned char sbuf1[FORMAT_BUF_SIZE];
static int
handle_multibyte_string (struct dev_font *font,
const unsigned char **str_ptr, int *str_len, int ctype)
{
const unsigned char *p;
int i, length;
p = *str_ptr;
length = *str_len;
if (ctype == -1 && font->cff_charsets) { /* freetype glyph indexes */
/* Convert freetype glyph indexes to CID. */
const unsigned char *inbuf = p;
unsigned char *outbuf = sbuf0;
for (i = 0; i < length; i += 2) {
unsigned int gid;
gid = *inbuf++ << 8;
gid += *inbuf++;
gid = cff_charsets_lookup_cid(font->cff_charsets, gid);
*outbuf++ = gid >> 8;
*outbuf++ = gid & 0xff;
}
p = sbuf0;
length = outbuf - sbuf0;
}
/* _FIXME_ */
else if (font->is_unicode) { /* UCS-4 */
if (ctype == 1) {
if (length * 4 >= FORMAT_BUF_SIZE) {
WARN("Too long string...");
return -1;
}
for (i = 0; i < length; i++) {
sbuf1[i*4 ] = font->ucs_group;
sbuf1[i*4+1] = font->ucs_plane;
sbuf1[i*4+2] = '\0';
sbuf1[i*4+3] = p[i];
}
length *= 4;
} else if (ctype == 2) {
int len = 0;
if (length * 2 >= FORMAT_BUF_SIZE) {
WARN("Too long string...");
return -1;
}
for (i = 0; i < length; i += 2, len += 4) {
sbuf1[len ] = font->ucs_group;
if ((p[i] & 0xf8) == 0xd8) {
int c;
/* Check for valid surrogate pair. */
if ((p[i] & 0xfc) != 0xd8 || i + 2 >= length || (p[i+2] & 0xfc) != 0xdc) {
WARN("Invalid surrogate p[%d]=%02X...", i, p[i]);
return -1;
}
c = (((p[i] & 0x03) << 10) | (p[i+1] << 2) | (p[i+2] & 0x03)) + 0x100;
sbuf1[len+1] = (c >> 8) & 0xff;
sbuf1[len+2] = c & 0xff;
i += 2;
} else {
sbuf1[len+1] = font->ucs_plane;
sbuf1[len+2] = p[i];
}
sbuf1[len+3] = p[i+1];
}
length = len;