File: zcfont.c

package info (click to toggle)
ghostscript 8.71~dfsg2-9+squeeze1
  • links: PTS, VCS
  • area: main
  • in suites: squeeze
  • size: 79,896 kB
  • ctags: 80,654
  • sloc: ansic: 501,432; sh: 25,689; python: 4,853; cpp: 3,633; perl: 3,597; tcl: 1,480; makefile: 1,187; lisp: 407; asm: 284; xml: 263; awk: 66; csh: 17; yacc: 15
file content (170 lines) | stat: -rw-r--r-- 5,009 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/* Copyright (C) 2001-2006 Artifex Software, Inc.
   All Rights Reserved.
  
   This software is provided AS-IS with no warranty, either express or
   implied.

   This software is distributed under license and may not be copied, modified
   or distributed except as expressly authorized under the terms of that
   license.  Refer to licensing information at http://www.artifex.com/
   or contact Artifex Software, Inc.,  7 Mt. Lassen Drive - Suite A-134,
   San Rafael, CA  94903, U.S.A., +1(415)492-9861, for further information.
*/

/* $Id: zcfont.c 9043 2008-08-28 22:48:19Z giles $ */
/* Composite font-related character operators */
#include "ghost.h"
#include "oper.h"
#include "gsmatrix.h"		/* for gxfont.h */
#include "gxfixed.h"		/* for gxfont.h */
#include "gxfont.h"
#include "gxtext.h"
#include "estack.h"
#include "ichar.h"
#include "ifont.h"
#include "igstate.h"
#include "store.h"

/* Forward references */
static int cshow_continue(i_ctx_t *);
static int cshow_restore_font(i_ctx_t *);

/* <proc> <string> cshow - */
static int
zcshow(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    os_ptr proc_op = op - 1;
    os_ptr str_op = op;
    gs_text_enum_t *penum;
    int code;

    /*
     * Even though this is not documented anywhere by Adobe,
     * some Adobe interpreters apparently allow the string and
     * the procedure to be provided in either order!
     */
    if (r_is_proc(proc_op))
	;
    else if (r_is_proc(op)) {	/* operands reversed */
	proc_op = op;
	str_op = op - 1;
    } else {
	check_op(2);
	return_error(e_typecheck);
    }
    if ((code = op_show_setup(i_ctx_p, str_op)) != 0 ||
	(code = gs_cshow_begin(igs, str_op->value.bytes, r_size(str_op),
			       imemory, &penum)) < 0)
	return code;
    if ((code = op_show_finish_setup(i_ctx_p, penum, 2, NULL)) < 0) {
	ifree_object(penum, "op_show_enum_setup");
	return code;
    }
    sslot = *proc_op;		/* save kerning proc */
    pop(2);
    return cshow_continue(i_ctx_p);
}
static int
cshow_continue(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;
    gs_text_enum_t *penum = senum;
    int code;

    check_estack(4);		/* in case we call the procedure */
    code = gs_text_process(penum);
    if (code != TEXT_PROCESS_INTERVENE) {
	code = op_show_continue_dispatch(i_ctx_p, 0, code);
	if (code == o_push_estack)	/* must be TEXT_PROCESS_RENDER */
	    make_op_estack(esp - 1, cshow_continue);
	return code;
    }
    /* Push the character code and width, and call the procedure. */
    {
	ref *pslot = &sslot;
	gs_point wpt;
	gs_font *font = gs_text_current_font(penum);
	gs_font *root_font = gs_rootfont(igs);
	gs_font *scaled_font;
	uint font_space = r_space(pfont_dict(font));
	uint root_font_space = r_space(pfont_dict(root_font));
	int fdepth = penum->fstack.depth;

	gs_text_current_width(penum, &wpt);
	if (font == root_font)
	    scaled_font = font;
	else if (fdepth > 0) {
	  /* Construct a scaled version of the leaf font. 
	     If font stack is deep enough, get the matrix for scaling
	     from the immediate parent of current font. 
	     (The font matrix of root font is not good for the purpose
	     in some case.) 
	     assert_(penum->fstack.items[fdepth].font == font
	             && penum->fstack.items[0].font == root_font); */
	  uint save_space = idmemory->current_space;
	  gs_font * immediate_parent = penum->fstack.items[fdepth - 1].font;

	  ialloc_set_space(idmemory, font_space);
	  code = gs_makefont(font->dir, font, 
			     &immediate_parent->FontMatrix,
			     &scaled_font);
	  ialloc_set_space(idmemory, save_space);
	  if (code < 0)
	    return code;
	}
	else {
	    /* Construct a scaled version of the leaf font. */
	    uint save_space = idmemory->current_space;
	    
	    ialloc_set_space(idmemory, font_space);
	    code = gs_makefont(font->dir, font, &root_font->FontMatrix,
			       &scaled_font);
	    ialloc_set_space(idmemory, save_space);
	    if (code < 0)
		return code;
	}
	push(3);
	make_int(op - 2, gs_text_current_char(penum) & 0xff);
	make_real(op - 1, wpt.x);
	make_real(op, wpt.y);
	make_struct(&ssfont, font_space, font);
	make_struct(&srfont, root_font_space, root_font);
	push_op_estack(cshow_restore_font);
	/* cshow does not change rootfont for user procedure */
	gs_set_currentfont(igs, scaled_font);
	*++esp = *pslot;	/* user procedure */
    }
    return o_push_estack;
}
static int
cshow_restore_font(i_ctx_t *i_ctx_p)
{
    /* We must restore both the root font and the current font. */
    gs_setfont(igs, r_ptr(&srfont, gs_font));
    gs_set_currentfont(igs, r_ptr(&ssfont, gs_font));
    return cshow_continue(i_ctx_p);
}

/* - rootfont <font> */
static int
zrootfont(i_ctx_t *i_ctx_p)
{
    os_ptr op = osp;

    push(1);
    *op = *pfont_dict(gs_rootfont(igs));
    return 0;
}

/* ------ Initialization procedure ------ */

const op_def zcfont_op_defs[] =
{
    {"2cshow", zcshow},
    {"0rootfont", zrootfont},
		/* Internal operators */
    {"0%cshow_continue", cshow_continue},
    {"0%cshow_restore_font", cshow_restore_font},
    op_def_end(0)
};