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/* Copyright (C) 2002 Aladdin Enterprises. All rights reserved.
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This software is provided AS-IS with no warranty, either express or
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implied.
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This software is distributed under license and may not be copied,
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modified or distributed except as expressly authorized under the terms
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of the license contained in the file LICENSE in this distribution.
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For more information about licensing, please refer to
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http://www.ghostscript.com/licensing/. For information on
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commercial licensing, go to http://www.artifex.com/licensing/ or
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contact Artifex Software, Inc., 101 Lucas Valley Road #110,
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San Rafael, CA 94903, U.S.A., +1(415)492-9861.
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*/
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/* $Id: gdevpdtt.c,v 1.104 2005/10/12 08:16:50 leonardo Exp $ */
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/* Text processing for pdfwrite. */
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#include "math_.h"
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#include "string_.h"
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#include "gx.h"
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#include "gserrors.h"
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#include "gscencs.h"
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#include "gscedata.h"
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#include "gsmatrix.h"
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#include "gzstate.h"
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#include "gxfcache.h" /* for orig_fonts list */
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#include "gxfont.h"
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#include "gxfont0.h"
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#include "gxfcid.h"
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#include "gxfcopy.h"
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#include "gxfcmap.h"
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#include "gxpath.h" /* for getting current point */
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#include "gxchar.h"
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#include "gxstate.h"
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#include "gdevpdfx.h"
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#include "gdevpdfg.h"
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#include "gdevpdtx.h"
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#include "gdevpdtd.h"
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#include "gdevpdtf.h"
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#include "gdevpdts.h"
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#include "gdevpdtt.h"
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#include "gdevpdti.h"
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#include "gxhldevc.h"
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/* ================ Text enumerator ================ */
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/* GC descriptor */
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private_st_pdf_text_enum();
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/* Define the auxiliary procedures for text processing. */
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private int
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pdf_text_resync(gs_text_enum_t *pte, const gs_text_enum_t *pfrom)
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{
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pdf_text_enum_t *const penum = (pdf_text_enum_t *)pte;
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if ((pte->text.operation ^ pfrom->text.operation) & ~TEXT_FROM_ANY)
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return_error(gs_error_rangecheck);
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if (penum->pte_default) {
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int code = gs_text_resync(penum->pte_default, pfrom);
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if (code < 0)
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return code;
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}
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pte->text = pfrom->text;
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gs_text_enum_copy_dynamic(pte, pfrom, false);
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return 0;
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}
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private bool
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pdf_text_is_width_only(const gs_text_enum_t *pte)
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{
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const pdf_text_enum_t *const penum = (const pdf_text_enum_t *)pte;
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if (penum->pte_default)
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return gs_text_is_width_only(penum->pte_default);
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return false;
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}
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private int
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pdf_text_current_width(const gs_text_enum_t *pte, gs_point *pwidth)
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{
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const pdf_text_enum_t *const penum = (const pdf_text_enum_t *)pte;
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if (penum->pte_default)
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return gs_text_current_width(penum->pte_default, pwidth);
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return_error(gs_error_rangecheck); /* can't happen */
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}
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private int
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pdf_text_set_cache(gs_text_enum_t *pte, const double *pw,
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gs_text_cache_control_t control)
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{
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pdf_text_enum_t *const penum = (pdf_text_enum_t *)pte;
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gx_device_pdf *pdev = (gx_device_pdf *)pte->dev;
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switch (control) {
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case TEXT_SET_CHAR_WIDTH:
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case TEXT_SET_CACHE_DEVICE:
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gs_distance_transform(pw[0], pw[1], &ctm_only(pte->pis), &pdev->char_width);
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break;
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case TEXT_SET_CACHE_DEVICE2:
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/*
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* pdev->char_width is used with synthesized Type 3 fonts only.
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* Since they are simple fonts, we only need the horisontal
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* width for Widths array. Therefore we don't check
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* gs_rootfont(pgs)->WMode and don't use pw[6:7].
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*/
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gs_distance_transform(pw[0], pw[1], &ctm_only(pte->pis), &pdev->char_width);
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if (penum->cdevproc_callout) {
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memcpy(penum->cdevproc_result, pw, sizeof(penum->cdevproc_result));
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return 0;
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}
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break;
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default:
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return_error(gs_error_rangecheck);
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}
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if (penum->current_font->FontType == ft_user_defined &&
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penum->orig_font->FontType != ft_composite &&
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penum->outer_CID == GS_NO_GLYPH &&
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!(penum->pte_default->text.operation & TEXT_DO_CHARWIDTH)) {
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int code;
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gs_font *font = penum->orig_font;
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gs_char ch;
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gs_glyph glyph;
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gs_const_string gnstr;
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if (penum->text.operation & TEXT_FROM_SINGLE_GLYPH) {
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byte buf[1];
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int char_code_length;
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glyph = pte->text.data.d_glyph;
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code = pdf_encode_glyph((gs_font_base *)font, glyph,
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buf, sizeof(buf), &char_code_length);
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if (code < 0) {
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/* Must not happen, becuse pdf_encode_glyph was passed in process_plain_text.*/
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ch = GS_NO_CHAR;
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} else if (char_code_length != 1) {
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/* Must not happen with type 3 fonts.*/
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ch = GS_NO_CHAR;
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} else
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ch = buf[0];
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} else {
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ch = penum->text.data.bytes[penum->index];
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glyph = font->procs.encode_char(font, ch, GLYPH_SPACE_NAME);
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/*
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* If glyph == GS_NO_GLYPH, we should replace it with
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* a notdef glyph, but we don't know how to do with Type 3 fonts.
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*/
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}
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if (glyph != GS_NO_GLYPH && ch != GS_NO_CHAR) {
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gs_show_enum *penum_s;
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extern_st(st_gs_show_enum);
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gs_fixed_rect clip_box;
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double pw1[10];
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int narg = (control == TEXT_SET_CHAR_WIDTH ? 2 :
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control == TEXT_SET_CACHE_DEVICE ? 6 : 10), i;
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if (penum->pte_default == NULL)
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return_error(gs_error_unregistered); /* Must not happen. */
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/* Check to verify the structure type is really gs_show_enum */
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if (gs_object_type(penum->pte_default->memory, penum->pte_default) != &st_gs_show_enum) {
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/* Must not happen with PS interpreter.
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Other clients should conform. */
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return_error(gs_error_unregistered);
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}
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penum_s = (gs_show_enum *)penum->pte_default;
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code = font->procs.glyph_name(font, glyph, &gnstr);
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if (code < 0)
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return_error(gs_error_unregistered); /* Must not happen. */
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/* BuildChar could change the scale before calling setcachedevice (Bug 687290).
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We must scale the setcachedevice arguments because we assumed
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identity scale before entering the charproc.
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For now we only handle scaling matrices.
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*/
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for (i = 0; i < narg; i += 2) {
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gs_point p;
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gs_point_transform(pw[i], pw[i + 1], &ctm_only(penum_s->pgs), &p);
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pw1[i] = p.x;
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pw1[i + 1] = p.y;
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}
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if (control != TEXT_SET_CHAR_WIDTH) {
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clip_box.p.x = float2fixed(pw1[2]);
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clip_box.p.y = float2fixed(pw1[3]);
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clip_box.q.x = float2fixed(pw1[4]);
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clip_box.q.y = float2fixed(pw1[5]);
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} else {
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/*
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* We have no character bbox, but we need one to install the clipping
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* to the graphic state of the PS interpreter. Since some fonts don't
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* provide a proper FontBBox (Bug 687239 supplies a zero one),
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* we set an "infinite" clipping here.
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* We also detected that min_int, max_int don't work here with
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* comparefiles/Bug687044.ps, therefore we divide them by 2.
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*/
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clip_box.p.x = clip_box.p.y = min_int / 2;
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clip_box.q.x = clip_box.q.y = max_int / 2;
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}
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code = gx_clip_to_rectangle(penum_s->pgs, &clip_box);
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if (code < 0)
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return code;
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code = pdf_set_charproc_attrs(pdev, pte->current_font,
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pw1, narg, control, ch, &gnstr);
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if (code < 0)
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return code;
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/* Prevent writing the clipping path to charproc.
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See the comment above and bugs 687678, 688327.
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Note that the clipping in the graphic state will be used while
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fallbacks to default implementations of graphic objects.
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Hopely such fallbacks are rare. */
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pdev->clip_path_id = gx_get_clip_path_id(penum_s->pgs);
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penum->charproc_accum = true;
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return code;
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} else {
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gs_matrix m;
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pdf_resource_t *pres = pdev->accumulating_substream_resource;
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/* pdf_text_process started a charproc stream accumulation,
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but now we re-decided to go with the default implementation.
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Cancel the stream now.
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*/
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code = pdf_exit_substream(pdev);
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if (code < 0)
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return code;
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code = pdf_cancel_resource(pdev, pres, resourceCharProc);
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if (code < 0)
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return code;
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pdf_forget_resource(pdev, pres, resourceCharProc);
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/* pdf_text_process had set an identity CTM for the
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charproc stream accumulation, but now we re-decided
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to go with the default implementation.
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Need to restore the correct CTM and add
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changes, which the charproc possibly did. */
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gs_matrix_multiply((gs_matrix *)&pdev->charproc_ctm, (gs_matrix *)&penum->pis->ctm, &m);
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gs_matrix_fixed_from_matrix(&penum->pis->ctm, &m);
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}
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}
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if (penum->pte_default) {
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if (penum->pte_default->text.operation & TEXT_DO_CHARWIDTH /* See process_cmap_text.*/)
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return gs_text_set_cache(penum->pte_default, pw, TEXT_SET_CHAR_WIDTH);
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else
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return gs_text_set_cache(penum->pte_default, pw, control);
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}
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return_error(gs_error_unregistered); /* can't happen */
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}
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private int
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pdf_text_retry(gs_text_enum_t *pte)
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{
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pdf_text_enum_t *const penum = (pdf_text_enum_t *)pte;
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if (penum->pte_default)
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return gs_text_retry(penum->pte_default);
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return_error(gs_error_rangecheck); /* can't happen */
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}
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private void
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pdf_text_release(gs_text_enum_t *pte, client_name_t cname)
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{
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pdf_text_enum_t *const penum = (pdf_text_enum_t *)pte;
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if (penum->pte_default) {
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gs_text_release(penum->pte_default, cname);
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penum->pte_default = 0;
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}
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pdf_text_release_cgp(penum);
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gx_default_text_release(pte, cname);
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}
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void
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pdf_text_release_cgp(pdf_text_enum_t *penum)
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{
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if (penum->cgp) {
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gs_free_object(penum->memory, penum->cgp, "pdf_text_release");
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penum->cgp = 0;
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}
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}
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/* Begin processing text. */
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private text_enum_proc_process(pdf_text_process);
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private const gs_text_enum_procs_t pdf_text_procs = {
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pdf_text_resync, pdf_text_process,
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pdf_text_is_width_only, pdf_text_current_width,
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pdf_text_set_cache, pdf_text_retry,
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pdf_text_release
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};
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private int
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pdf_prepare_text_drawing(gx_device_pdf *const pdev, gs_text_enum_t *pte)
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{
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gs_imager_state * pis = pte->pis;
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const gx_device_color * pdcolor = pte->pdcolor;
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const gx_clip_path * pcpath = pte->pcpath;
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const gs_text_params_t *text = &pte->text;
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bool new_clip = false; /* Quiet compiler. */
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int code;
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if (!(text->operation & TEXT_DO_NONE) || pis->text_rendering_mode == 3) {
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new_clip = pdf_must_put_clip_path(pdev, pcpath);
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if (new_clip)
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code = pdf_unclip(pdev);
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else if (pdev->context == PDF_IN_NONE)
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code = pdf_open_page(pdev, PDF_IN_STREAM);
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else
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code = 0;
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if (code < 0)
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return code;
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code = pdf_prepare_fill(pdev, pis);
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if (code < 0)
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return code;
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}
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if (text->operation & TEXT_DO_DRAW) {
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/*
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* Set the clipping path and drawing color. We set both the fill
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* and stroke color, because we don't know whether the fonts will be
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* filled or stroked, and we can't set a color while we are in text
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* mode. (This is a consequence of the implementation, not a
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* limitation of PDF.)
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*/
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if (new_clip) {
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code = pdf_put_clip_path(pdev, pcpath);
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if (code < 0)
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return code;
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}
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if ((code =
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pdf_set_drawing_color(pdev, pis, pdcolor, &pdev->saved_stroke_color,
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&pdev->stroke_used_process_color,
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325 |
&psdf_set_stroke_color_commands)) < 0 ||
|
|
|
326 |
(code =
|
|
|
327 |
pdf_set_drawing_color(pdev, pis, pdcolor, &pdev->saved_fill_color,
|
|
|
328 |
&pdev->fill_used_process_color,
|
|
|
329 |
&psdf_set_fill_color_commands)) < 0
|
|
|
330 |
)
|
|
|
331 |
return code;
|
|
|
332 |
}
|
|
|
333 |
return 0;
|
|
|
334 |
}
|
|
|
335 |
|
|
|
336 |
int
|
|
|
337 |
gdev_pdf_text_begin(gx_device * dev, gs_imager_state * pis,
|
|
|
338 |
const gs_text_params_t *text, gs_font * font,
|
|
|
339 |
gx_path * path0, const gx_device_color * pdcolor,
|
|
|
340 |
const gx_clip_path * pcpath,
|
|
|
341 |
gs_memory_t * mem, gs_text_enum_t ** ppte)
|
|
|
342 |
{
|
|
|
343 |
gx_device_pdf *const pdev = (gx_device_pdf *)dev;
|
|
|
344 |
gx_path *path = path0;
|
|
|
345 |
pdf_text_enum_t *penum;
|
|
|
346 |
gs_fixed_point cpt;
|
|
|
347 |
int code;
|
|
|
348 |
|
|
|
349 |
/* Track the dominant text rotation. */
|
|
|
350 |
{
|
|
|
351 |
gs_matrix tmat;
|
|
|
352 |
int i;
|
|
|
353 |
|
|
|
354 |
gs_matrix_multiply(&font->FontMatrix, &ctm_only(pis), &tmat);
|
|
|
355 |
if (is_xxyy(&tmat))
|
|
|
356 |
i = (tmat.xx >= 0 ? 0 : 2);
|
|
|
357 |
else if (is_xyyx(&tmat))
|
|
|
358 |
i = (tmat.xy >= 0 ? 1 : 3);
|
|
|
359 |
else
|
|
|
360 |
i = 4;
|
|
|
361 |
pdf_current_page(pdev)->text_rotation.counts[i] += text->size;
|
|
|
362 |
}
|
|
|
363 |
|
|
|
364 |
if (font->FontType == ft_user_defined &&
|
|
|
365 |
(text->operation & TEXT_DO_NONE) && (text->operation & TEXT_RETURN_WIDTH)) {
|
|
|
366 |
/* This is stringwidth, see gx_default_text_begin.
|
|
|
367 |
* We need to prevent writing characters to PS cache,
|
|
|
368 |
* otherwise the font converts to bitmaps.
|
|
|
369 |
* So pass through even with stringwidth.
|
|
|
370 |
*/
|
|
|
371 |
code = gx_hld_stringwidth_begin(pis, &path);
|
|
|
372 |
if (code < 0)
|
|
|
373 |
return code;
|
|
|
374 |
} else if ((!(text->operation & TEXT_DO_DRAW) && pis->text_rendering_mode != 3)
|
|
|
375 |
|| path == 0 || gx_path_current_point(path, &cpt) < 0
|
|
|
376 |
)
|
|
|
377 |
return gx_default_text_begin(dev, pis, text, font, path, pdcolor,
|
|
|
378 |
pcpath, mem, ppte);
|
|
|
379 |
|
|
|
380 |
/* Allocate and initialize the enumerator. */
|
|
|
381 |
|
|
|
382 |
rc_alloc_struct_1(penum, pdf_text_enum_t, &st_pdf_text_enum, mem,
|
|
|
383 |
return_error(gs_error_VMerror), "gdev_pdf_text_begin");
|
|
|
384 |
penum->rc.free = rc_free_text_enum;
|
|
|
385 |
penum->pte_default = 0;
|
|
|
386 |
penum->charproc_accum = false;
|
|
|
387 |
penum->cdevproc_callout = false;
|
|
|
388 |
penum->returned.total_width.x = penum->returned.total_width.y = 0;
|
|
|
389 |
penum->cgp = NULL;
|
|
|
390 |
code = gs_text_enum_init((gs_text_enum_t *)penum, &pdf_text_procs,
|
|
|
391 |
dev, pis, text, font, path, pdcolor, pcpath, mem);
|
|
|
392 |
if (code < 0) {
|
|
|
393 |
gs_free_object(mem, penum, "gdev_pdf_text_begin");
|
|
|
394 |
return code;
|
|
|
395 |
}
|
|
|
396 |
if (pdev->font3 != 0) {
|
|
|
397 |
/* A text operation happens while accumulating a charproc.
|
|
|
398 |
This is a case when source document uses a Type 3 font,
|
|
|
399 |
which's charproc uses another font.
|
|
|
400 |
Since the text operation is handled by the device,
|
|
|
401 |
the font isn't converting to a raster (i.e. to a bitmap font).
|
|
|
402 |
Disable the grid fitting for the convertion to get a proper outlines,
|
|
|
403 |
because the viewer resolution is not known during the accumulation.
|
|
|
404 |
Note we set identity CTM in pdf_text_set_cache for the accumilation,
|
|
|
405 |
and therefore the font may look too small while the source charproc
|
|
|
406 |
interpretation. The document tpc2.ps of the bug 687087 is an example.
|
|
|
407 |
*/
|
|
|
408 |
penum->device_disabled_grid_fitting = true;
|
|
|
409 |
}
|
|
|
410 |
|
|
|
411 |
*ppte = (gs_text_enum_t *)penum;
|
|
|
412 |
|
|
|
413 |
return 0;
|
|
|
414 |
}
|
|
|
415 |
|
|
|
416 |
/* ================ Font cache element ================ */
|
|
|
417 |
|
|
|
418 |
/* GC descriptor */
|
|
|
419 |
private_st_pdf_font_cache_elem();
|
|
|
420 |
|
|
|
421 |
/*
|
|
|
422 |
* Compute id for a font cache element.
|
|
|
423 |
*/
|
|
|
424 |
private ulong
|
|
|
425 |
pdf_font_cache_elem_id(gs_font *font)
|
|
|
426 |
{
|
|
|
427 |
#if 0
|
|
|
428 |
/*
|
|
|
429 |
* For compatibility with Ghostscript rasterizer's
|
|
|
430 |
* cache logic we use UniqueID to identify fonts.
|
|
|
431 |
* Note that with buggy documents, which don't
|
|
|
432 |
* undefine UniqueID redefining a font,
|
|
|
433 |
* Ghostscript PS interpreter can occasionaly
|
|
|
434 |
* replace cache elements on insufficient cache size,
|
|
|
435 |
* taking glyphs from random fonts with random metrics,
|
|
|
436 |
* therefore the compatibility isn't complete.
|
|
|
437 |
*/
|
|
|
438 |
/*
|
|
|
439 |
* This branch is incompatible with pdf_notify_remove_font.
|
|
|
440 |
*/
|
|
|
441 |
if (font->FontType == ft_composite || font->PaintType != 0 ||
|
|
|
442 |
!uid_is_valid(&(((gs_font_base *)font)->UID)))
|
|
|
443 |
return font->id;
|
|
|
444 |
else
|
|
|
445 |
return ((gs_font_base *)font)->UID.id;
|
|
|
446 |
#else
|
|
|
447 |
return font->id;
|
|
|
448 |
#endif
|
|
|
449 |
}
|
|
|
450 |
|
|
|
451 |
private pdf_font_cache_elem_t **
|
|
|
452 |
pdf_locate_font_cache_elem(gx_device_pdf *pdev, gs_font *font)
|
|
|
453 |
{
|
|
|
454 |
pdf_font_cache_elem_t **e = &pdev->font_cache;
|
|
|
455 |
long id = pdf_font_cache_elem_id(font);
|
|
|
456 |
|
|
|
457 |
for (; *e != 0; e = &(*e)->next)
|
|
|
458 |
if ((*e)->font_id == id) {
|
|
|
459 |
return e;
|
|
|
460 |
}
|
|
|
461 |
return 0;
|
|
|
462 |
}
|
|
|
463 |
|
|
|
464 |
private void
|
|
|
465 |
pdf_remove_font_cache_elem(pdf_font_cache_elem_t *e0)
|
|
|
466 |
{
|
|
|
467 |
gx_device_pdf *pdev = e0->pdev;
|
|
|
468 |
pdf_font_cache_elem_t **e = &pdev->font_cache;
|
|
|
469 |
|
|
|
470 |
for (; *e != 0; e = &(*e)->next)
|
|
|
471 |
if (*e == e0) {
|
|
|
472 |
*e = e0->next;
|
|
|
473 |
gs_free_object(pdev->pdf_memory, e0->glyph_usage,
|
|
|
474 |
"pdf_remove_font_cache_elem");
|
|
|
475 |
gs_free_object(pdev->pdf_memory, e0->real_widths,
|
|
|
476 |
"pdf_remove_font_cache_elem");
|
|
|
477 |
e0->glyph_usage = 0;
|
|
|
478 |
e0->real_widths = 0;
|
|
|
479 |
gs_free_object(pdev->pdf_memory, e0,
|
|
|
480 |
"pdf_remove_font_cache_elem");
|
|
|
481 |
return;
|
|
|
482 |
}
|
|
|
483 |
}
|
|
|
484 |
|
|
|
485 |
private void
|
|
|
486 |
font_cache_elem_array_sizes(gx_device_pdf *pdev, gs_font *font,
|
|
|
487 |
int *num_widths, int *num_chars)
|
|
|
488 |
{
|
|
|
489 |
switch (font->FontType) {
|
|
|
490 |
case ft_composite:
|
|
|
491 |
*num_widths = 0; /* Unused for Type 0 */
|
|
|
492 |
*num_chars = 65536; /* No chance to determine, use max. */
|
|
|
493 |
break;
|
|
|
494 |
case ft_encrypted:
|
|
|
495 |
case ft_encrypted2:
|
|
|
496 |
case ft_user_defined:
|
|
|
497 |
case ft_disk_based:
|
|
|
498 |
case ft_Chameleon:
|
|
|
499 |
case ft_TrueType:
|
|
|
500 |
*num_widths = *num_chars = 256; /* Assuming access to glyph_usage by character codes */
|
|
|
501 |
break;
|
|
|
502 |
case ft_CID_encrypted:
|
|
|
503 |
*num_widths = *num_chars = ((gs_font_cid0 *)font)->cidata.common.CIDCount;
|
|
|
504 |
break;
|
|
|
505 |
case ft_CID_TrueType:
|
|
|
506 |
*num_widths = *num_chars = ((gs_font_cid2 *)font)->cidata.common.CIDCount;
|
|
|
507 |
break;
|
|
|
508 |
default:
|
|
|
509 |
*num_widths = *num_chars = 65536; /* No chance to determine, use max. */
|
|
|
510 |
}
|
|
|
511 |
}
|
|
|
512 |
|
|
|
513 |
private int
|
|
|
514 |
alloc_font_cache_elem_arrays(gx_device_pdf *pdev, pdf_font_cache_elem_t *e,
|
|
|
515 |
gs_font *font)
|
|
|
516 |
{
|
|
|
517 |
int num_widths, num_chars, len;
|
|
|
518 |
|
|
|
519 |
font_cache_elem_array_sizes(pdev, font, &num_widths, &num_chars);
|
|
|
520 |
len = (num_chars + 7) / 8;
|
|
|
521 |
e->glyph_usage = gs_alloc_bytes(pdev->pdf_memory,
|
|
|
522 |
len, "alloc_font_cache_elem_arrays");
|
|
|
523 |
|
|
|
524 |
e->real_widths = (num_widths > 0 ? (double *)gs_alloc_bytes(pdev->pdf_memory,
|
|
|
525 |
num_widths * sizeof(*e->real_widths) *
|
|
|
526 |
(font->FontType == ft_user_defined ? 2 : 1),
|
|
|
527 |
"alloc_font_cache_elem_arrays") : NULL);
|
|
|
528 |
if (e->glyph_usage == NULL || (num_widths !=0 && e->real_widths == NULL)) {
|
|
|
529 |
gs_free_object(pdev->pdf_memory, e->glyph_usage,
|
|
|
530 |
"pdf_attach_font_resource");
|
|
|
531 |
gs_free_object(pdev->pdf_memory, e->real_widths,
|
|
|
532 |
"alloc_font_cache_elem_arrays");
|
|
|
533 |
return_error(gs_error_VMerror);
|
|
|
534 |
}
|
|
|
535 |
e->num_chars = num_chars;
|
|
|
536 |
e->num_widths = num_widths;
|
|
|
537 |
memset(e->glyph_usage, 0, len);
|
|
|
538 |
memset(e->real_widths, 0, num_widths * sizeof(*e->real_widths));
|
|
|
539 |
return 0;
|
|
|
540 |
}
|
|
|
541 |
|
|
|
542 |
int
|
|
|
543 |
pdf_free_font_cache(gx_device_pdf *pdev)
|
|
|
544 |
{
|
|
|
545 |
/* fixme : release elements. */
|
|
|
546 |
pdev->font_cache = NULL;
|
|
|
547 |
return 0;
|
|
|
548 |
}
|
|
|
549 |
|
|
|
550 |
|
|
|
551 |
/*
|
|
|
552 |
* Retrive font resource attached to a font,
|
|
|
553 |
* allocating glyph_usage and real_widths on request.
|
|
|
554 |
*/
|
|
|
555 |
int
|
|
|
556 |
pdf_attached_font_resource(gx_device_pdf *pdev, gs_font *font,
|
|
|
557 |
pdf_font_resource_t **pdfont, byte **glyph_usage,
|
|
|
558 |
double **real_widths, int *num_chars, int *num_widths)
|
|
|
559 |
{
|
|
|
560 |
pdf_font_cache_elem_t **e = pdf_locate_font_cache_elem(pdev, font);
|
|
|
561 |
|
|
|
562 |
if (e != NULL && (((*e)->glyph_usage == NULL && glyph_usage !=NULL) ||
|
|
|
563 |
((*e)->real_widths == NULL && real_widths !=NULL))) {
|
|
|
564 |
int code = alloc_font_cache_elem_arrays(pdev, *e, font);
|
|
|
565 |
|
|
|
566 |
if (code < 0)
|
|
|
567 |
return code;
|
|
|
568 |
}
|
|
|
569 |
*pdfont = (e == NULL ? NULL : (*e)->pdfont);
|
|
|
570 |
if (glyph_usage != NULL)
|
|
|
571 |
*glyph_usage = (e == NULL ? NULL : (*e)->glyph_usage);
|
|
|
572 |
if (real_widths != NULL)
|
|
|
573 |
*real_widths = (e == NULL ? NULL : (*e)->real_widths);
|
|
|
574 |
if (num_chars != NULL)
|
|
|
575 |
*num_chars = (e == NULL ? 0 : (*e)->num_chars);
|
|
|
576 |
if (num_widths != NULL)
|
|
|
577 |
*num_widths = (e == NULL ? 0 : (*e)->num_widths);
|
|
|
578 |
return 0;
|
|
|
579 |
}
|
|
|
580 |
|
|
|
581 |
private int
|
|
|
582 |
pdf_notify_remove_font(void *proc_data, void *event_data)
|
|
|
583 |
{ /* gs_font_finalize passes event_data == NULL, so check it here. */
|
|
|
584 |
if (event_data == NULL)
|
|
|
585 |
pdf_remove_font_cache_elem((pdf_font_cache_elem_t *)proc_data);
|
|
|
586 |
return 0;
|
|
|
587 |
}
|
|
|
588 |
|
|
|
589 |
/*
|
|
|
590 |
* Attach font resource to a font.
|
|
|
591 |
*/
|
|
|
592 |
int
|
|
|
593 |
pdf_attach_font_resource(gx_device_pdf *pdev, gs_font *font,
|
|
|
594 |
pdf_font_resource_t *pdfont)
|
|
|
595 |
{
|
|
|
596 |
int num_chars, num_widths, len;
|
|
|
597 |
pdf_font_cache_elem_t *e, **pe = pdf_locate_font_cache_elem(pdev, font);
|
|
|
598 |
|
|
|
599 |
if (pdfont->FontType != font->FontType)
|
|
|
600 |
return_error(gs_error_unregistered); /* Must not happen. */
|
|
|
601 |
font_cache_elem_array_sizes(pdev, font, &num_widths, &num_chars);
|
|
|
602 |
len = (num_chars + 7) / 8;
|
|
|
603 |
if (pe != NULL) {
|
|
|
604 |
e = *pe;
|
|
|
605 |
if (e->pdfont == pdfont)
|
|
|
606 |
return 0;
|
|
|
607 |
e->pdfont = pdfont;
|
|
|
608 |
/* Reset glyph cache because e->pdfont had changed. */
|
|
|
609 |
memset(e->glyph_usage, 0, len);
|
|
|
610 |
memset(e->real_widths, 0, num_widths * sizeof(*e->real_widths));
|
|
|
611 |
} else {
|
|
|
612 |
int code;
|
|
|
613 |
e = (pdf_font_cache_elem_t *)gs_alloc_struct(pdev->pdf_memory,
|
|
|
614 |
pdf_font_cache_elem_t, &st_pdf_font_cache_elem,
|
|
|
615 |
"pdf_attach_font_resource");
|
|
|
616 |
if (e == NULL)
|
|
|
617 |
return_error(gs_error_VMerror);
|
|
|
618 |
e->pdfont = pdfont;
|
|
|
619 |
e->font_id = pdf_font_cache_elem_id(font);
|
|
|
620 |
e->num_chars = 0;
|
|
|
621 |
e->glyph_usage = NULL;
|
|
|
622 |
e->real_widths = NULL;
|
|
|
623 |
e->pdev = pdev;
|
|
|
624 |
e->next = pdev->font_cache;
|
|
|
625 |
pdev->font_cache = e;
|
|
|
626 |
code = gs_notify_register(&font->notify_list, pdf_notify_remove_font, e);
|
|
|
627 |
if (code < 0)
|
|
|
628 |
return code;
|
|
|
629 |
}
|
|
|
630 |
return 0;
|
|
|
631 |
}
|
|
|
632 |
|
|
|
633 |
/* ================ Process text ================ */
|
|
|
634 |
|
|
|
635 |
/* ---------------- Internal utilities ---------------- */
|
|
|
636 |
|
|
|
637 |
/*
|
|
|
638 |
* Compute and return the orig_matrix of a font.
|
|
|
639 |
*/
|
|
|
640 |
int
|
|
|
641 |
pdf_font_orig_matrix(const gs_font *font, gs_matrix *pmat)
|
|
|
642 |
{
|
|
|
643 |
switch (font->FontType) {
|
|
|
644 |
case ft_composite: /* subfonts have their own FontMatrix */
|
|
|
645 |
case ft_TrueType:
|
|
|
646 |
case ft_CID_TrueType:
|
|
|
647 |
/* The TrueType FontMatrix is 1 unit per em, which is what we want. */
|
|
|
648 |
gs_make_identity(pmat);
|
|
|
649 |
return 0;
|
|
|
650 |
case ft_encrypted:
|
|
|
651 |
case ft_encrypted2:
|
|
|
652 |
case ft_CID_encrypted:
|
|
|
653 |
case ft_user_defined:
|
|
|
654 |
/*
|
|
|
655 |
* Type 1 fonts are supposed to use a standard FontMatrix of
|
|
|
656 |
* [0.001 0 0 0.001 0 0], with a 1000-unit cell. However,
|
|
|
657 |
* Windows NT 4.0 creates Type 1 fonts, apparently derived from
|
|
|
658 |
* TrueType fonts, that use a 2048-unit cell and corresponding
|
|
|
659 |
* FontMatrix. Also, some PS programs perform font scaling by
|
|
|
660 |
* replacing FontMatrix like this :
|
|
|
661 |
*
|
|
|
662 |
* /f12 /Times-Roman findfont
|
|
|
663 |
* copyfont % (remove FID)
|
|
|
664 |
* dup /FontMatrix [0.012 0 0 0.012 0 0] put
|
|
|
665 |
* definefont
|
|
|
666 |
* /f12 1 selectfont
|
|
|
667 |
*
|
|
|
668 |
* Such fonts are their own "base font", but the orig_matrix
|
|
|
669 |
* must still be set to 0.001, not 0.012 .
|
|
|
670 |
*
|
|
|
671 |
* The old code used a heuristic to detect and correct for this here.
|
|
|
672 |
* Unfortunately it doesn't work properly when it meets a font
|
|
|
673 |
* with FontMatrix like this :
|
|
|
674 |
*
|
|
|
675 |
* /FontMatrix [1 2288 div 0 0 1 2288 div 0 0 ] def
|
|
|
676 |
*
|
|
|
677 |
* (the bug 686970). Also comparefiles\455690.pdf appears to
|
|
|
678 |
* have similar problem. Therefore we added a support to lib/gs_fonts.ps,
|
|
|
679 |
* src/zbfont.c, src/gsfont.c that provides an acces to the original
|
|
|
680 |
* font via a special key .OrigFont added to the font dictionary while definefont.
|
|
|
681 |
* Now we work through this access with PS interpreter,
|
|
|
682 |
* but keep the old heuristic for other clients.
|
|
|
683 |
*/
|
|
|
684 |
{
|
|
|
685 |
const gs_font *base_font = font;
|
|
|
686 |
|
|
|
687 |
while (base_font->base != base_font)
|
|
|
688 |
base_font = base_font->base;
|
|
|
689 |
if (font->FontType == ft_user_defined)
|
|
|
690 |
*pmat = base_font->FontMatrix;
|
|
|
691 |
else if (base_font->orig_FontMatrix.xx != 0 || base_font->orig_FontMatrix.xy != 0 ||
|
|
|
692 |
base_font->orig_FontMatrix.yx != 0 || base_font->orig_FontMatrix.yy != 0)
|
|
|
693 |
*pmat = base_font->orig_FontMatrix;
|
|
|
694 |
else {
|
|
|
695 |
/* Must not happen with PS interpreter.
|
|
|
696 |
Provide a hewuristic for other clients.
|
|
|
697 |
*/
|
|
|
698 |
if (base_font->FontMatrix.xx == 1.0/2048 &&
|
|
|
699 |
base_font->FontMatrix.xy == 0 &&
|
|
|
700 |
base_font->FontMatrix.yx == 0 &&
|
|
|
701 |
any_abs(base_font->FontMatrix.yy) == 1.0/2048
|
|
|
702 |
)
|
|
|
703 |
*pmat = base_font->FontMatrix;
|
|
|
704 |
else
|
|
|
705 |
gs_make_scaling(0.001, 0.001, pmat);
|
|
|
706 |
}
|
|
|
707 |
}
|
|
|
708 |
return 0;
|
|
|
709 |
default:
|
|
|
710 |
return_error(gs_error_rangecheck);
|
|
|
711 |
}
|
|
|
712 |
}
|
|
|
713 |
|
|
|
714 |
int
|
|
|
715 |
font_orig_scale(const gs_font *font, double *sx)
|
|
|
716 |
{
|
|
|
717 |
gs_matrix mat;
|
|
|
718 |
int code = pdf_font_orig_matrix(font, &mat);
|
|
|
719 |
|
|
|
720 |
if (code < 0)
|
|
|
721 |
return code;
|
|
|
722 |
*sx = mat.xx;
|
|
|
723 |
return 0;
|
|
|
724 |
}
|
|
|
725 |
|
|
|
726 |
/*
|
|
|
727 |
* Check the Encoding compatibility
|
|
|
728 |
*/
|
|
|
729 |
bool
|
|
|
730 |
pdf_check_encoding_compatibility(const pdf_font_resource_t *pdfont,
|
|
|
731 |
const pdf_char_glyph_pair_t *pairs, int num_chars)
|
|
|
732 |
{
|
|
|
733 |
int i;
|
|
|
734 |
|
|
|
735 |
for (i = 0; i < num_chars; ++i) {
|
|
|
736 |
gs_char ch = pairs[i].chr;
|
|
|
737 |
pdf_encoding_element_t *pet = &pdfont->u.simple.Encoding[ch];
|
|
|
738 |
|
|
|
739 |
if (pairs[i].glyph == pet->glyph)
|
|
|
740 |
continue;
|
|
|
741 |
if (pet->glyph != GS_NO_GLYPH) /* encoding conflict */
|
|
|
742 |
return false;
|
|
|
743 |
}
|
|
|
744 |
return true;
|
|
|
745 |
}
|
|
|
746 |
|
|
|
747 |
/*
|
|
|
748 |
* Check font resource for encoding compatibility.
|
|
|
749 |
*/
|
|
|
750 |
private bool
|
|
|
751 |
pdf_is_compatible_encoding(gx_device_pdf *pdev, pdf_font_resource_t *pdfont,
|
|
|
752 |
gs_font *font, const pdf_char_glyph_pair_t *pairs, int num_chars)
|
|
|
753 |
{
|
|
|
754 |
/*
|
|
|
755 |
* This crude version of the code ignores
|
|
|
756 |
* the possibility of re-encoding characters.
|
|
|
757 |
*/
|
|
|
758 |
switch (pdfont->FontType) {
|
|
|
759 |
case ft_composite:
|
|
|
760 |
{ /*
|
|
|
761 |
* We assume that source document don't redefine CMap
|
|
|
762 |
* resources and that incremental CMaps do not exist.
|
|
|
763 |
* Therefore we don't maintain stable CMap copies,
|
|
|
764 |
* but just compare CMap names for equality.
|
|
|
765 |
* A better implementation should compare the chars->glyphs
|
|
|
766 |
* translation against the stable copy of CMap,
|
|
|
767 |
* which to be handled with PDF CMap resource.
|
|
|
768 |
*/
|
|
|
769 |
gs_font_type0 *pfont = (gs_font_type0 *)font;
|
|
|
770 |
|
|
|
771 |
if (pfont->data.FMapType == fmap_CMap) {
|
|
|
772 |
const gs_cmap_t *pcmap = pfont->data.CMap;
|
|
|
773 |
const gs_const_string *s0 = &pdfont->u.type0.CMapName;
|
|
|
774 |
const gs_const_string *s1 = &pcmap->CMapName;
|
|
|
775 |
|
|
|
776 |
return (s0->size == s1->size &&
|
|
|
777 |
!memcmp(s0->data, s1->data, s0->size));
|
|
|
778 |
}
|
|
|
779 |
}
|
|
|
780 |
return false;
|
|
|
781 |
case ft_user_defined:
|
|
|
782 |
if (pdfont->u.simple.Encoding == NULL)
|
|
|
783 |
return false; /* Not sure. Happens with 020-01.ps . */
|
|
|
784 |
/* fall through */
|
|
|
785 |
case ft_encrypted:
|
|
|
786 |
case ft_encrypted2:
|
|
|
787 |
case ft_TrueType:
|
|
|
788 |
return pdf_check_encoding_compatibility(pdfont, pairs, num_chars);
|
|
|
789 |
case ft_CID_encrypted:
|
|
|
790 |
case ft_CID_TrueType:
|
|
|
791 |
{
|
|
|
792 |
gs_font *font1 = (gs_font *)pdf_font_resource_font(pdfont, false);
|
|
|
793 |
|
|
|
794 |
return gs_is_CIDSystemInfo_compatible(
|
|
|
795 |
gs_font_cid_system_info(font),
|
|
|
796 |
gs_font_cid_system_info(font1));
|
|
|
797 |
}
|
|
|
798 |
default:
|
|
|
799 |
return false;
|
|
|
800 |
}
|
|
|
801 |
}
|
|
|
802 |
|
|
|
803 |
/*
|
|
|
804 |
* Find a font resource compatible with a given font.
|
|
|
805 |
*/
|
|
|
806 |
private int
|
|
|
807 |
pdf_find_font_resource(gx_device_pdf *pdev, gs_font *font,
|
|
|
808 |
pdf_resource_type_t type,
|
|
|
809 |
pdf_font_resource_t **ppdfont,
|
|
|
810 |
pdf_char_glyph_pairs_t *cgp)
|
|
|
811 |
{
|
|
|
812 |
pdf_resource_t **pchain = pdev->resources[type].chains;
|
|
|
813 |
pdf_resource_t *pres;
|
|
|
814 |
int i;
|
|
|
815 |
|
|
|
816 |
for (i = 0; i < NUM_RESOURCE_CHAINS; i++) {
|
|
|
817 |
for (pres = pchain[i]; pres != 0; pres = pres->next) {
|
|
|
818 |
pdf_font_resource_t *pdfont = (pdf_font_resource_t *)pres;
|
|
|
819 |
const gs_font_base *cfont;
|
|
|
820 |
gs_font *ofont = font;
|
|
|
821 |
int code;
|
|
|
822 |
|
|
|
823 |
if (font->FontType != pdfont->FontType)
|
|
|
824 |
continue;
|
|
|
825 |
if (pdfont->FontType == ft_composite) {
|
|
|
826 |
gs_font_type0 *font0 = (gs_font_type0 *)font;
|
|
|
827 |
|
|
|
828 |
ofont = font0->data.FDepVector[0]; /* See pdf_make_font_resource. */
|
|
|
829 |
cfont = pdf_font_resource_font(pdfont->u.type0.DescendantFont, false);
|
|
|
830 |
if (font0->data.CMap->WMode != pdfont->u.type0.WMode)
|
|
|
831 |
continue;
|
|
|
832 |
} else
|
|
|
833 |
cfont = pdf_font_resource_font(pdfont, false);
|
|
|
834 |
if (!pdf_is_CID_font(ofont) &&
|
|
|
835 |
!pdf_is_compatible_encoding(pdev, pdfont, font, cgp->s, cgp->num_all_chars))
|
|
|
836 |
continue;
|
|
|
837 |
if (cfont == 0)
|
|
|
838 |
continue;
|
|
|
839 |
code = gs_copied_can_copy_glyphs((const gs_font *)cfont, ofont,
|
|
|
840 |
&cgp->s[cgp->unused_offset].glyph, cgp->num_unused_chars,
|
|
|
841 |
sizeof(pdf_char_glyph_pair_t), true);
|
|
|
842 |
if (code == gs_error_unregistered) /* Debug purpose only. */
|
|
|
843 |
return code;
|
|
|
844 |
if(code > 0) {
|
|
|
845 |
*ppdfont = pdfont;
|
|
|
846 |
return 1;
|
|
|
847 |
}
|
|
|
848 |
}
|
|
|
849 |
}
|
|
|
850 |
return 0;
|
|
|
851 |
}
|
|
|
852 |
|
|
|
853 |
/*
|
|
|
854 |
* Find a type0 font resource for a gived descendent name and CMap name.
|
|
|
855 |
*/
|
|
|
856 |
private int
|
|
|
857 |
pdf_find_type0_font_resource(gx_device_pdf *pdev, const pdf_font_resource_t *pdsubf,
|
|
|
858 |
const gs_const_string *CMapName, pdf_font_resource_t **ppdfont)
|
|
|
859 |
{
|
|
|
860 |
pdf_resource_t **pchain = pdev->resources[resourceFont].chains;
|
|
|
861 |
pdf_resource_t *pres;
|
|
|
862 |
int i;
|
|
|
863 |
|
|
|
864 |
for (i = 0; i < NUM_RESOURCE_CHAINS; i++) {
|
|
|
865 |
for (pres = pchain[i]; pres != 0; pres = pres->next) {
|
|
|
866 |
pdf_font_resource_t *pdfont = (pdf_font_resource_t *)pres;
|
|
|
867 |
|
|
|
868 |
if (pdfont->FontType != ft_composite)
|
|
|
869 |
continue;
|
|
|
870 |
if (pdfont->u.type0.DescendantFont != pdsubf)
|
|
|
871 |
continue;
|
|
|
872 |
if (pdfont->BaseFont.size != pdsubf->BaseFont.size + CMapName->size + 1)
|
|
|
873 |
continue;
|
|
|
874 |
if (memcmp(pdfont->BaseFont.data + pdsubf->BaseFont.size + 1,
|
|
|
875 |
CMapName->data, CMapName->size))
|
|
|
876 |
continue;
|
|
|
877 |
*ppdfont = pdfont;
|
|
|
878 |
return 1;
|
|
|
879 |
}
|
|
|
880 |
}
|
|
|
881 |
return 0;
|
|
|
882 |
}
|
|
|
883 |
|
|
|
884 |
|
|
|
885 |
private int pdf_make_font_resource(gx_device_pdf *pdev, gs_font *font,
|
|
|
886 |
pdf_font_resource_t **ppdfont,
|
|
|
887 |
pdf_char_glyph_pairs_t *cgp);
|
|
|
888 |
|
|
|
889 |
/*
|
|
|
890 |
* Create or find a CID font resource object for a glyph set.
|
|
|
891 |
*/
|
|
|
892 |
int
|
|
|
893 |
pdf_obtain_cidfont_resource(gx_device_pdf *pdev, gs_font *subfont,
|
|
|
894 |
pdf_font_resource_t **ppdsubf,
|
|
|
895 |
pdf_char_glyph_pairs_t *cgp)
|
|
|
896 |
{
|
|
|
897 |
int code = 0;
|
|
|
898 |
|
|
|
899 |
pdf_attached_font_resource(pdev, subfont, ppdsubf, NULL, NULL, NULL, NULL);
|
|
|
900 |
if (*ppdsubf != NULL) {
|
|
|
901 |
const gs_font_base *cfont = pdf_font_resource_font(*ppdsubf, false);
|
|
|
902 |
|
|
|
903 |
code = gs_copied_can_copy_glyphs((const gs_font *)cfont, subfont,
|
|
|
904 |
&cgp->s[cgp->unused_offset].glyph, cgp->num_unused_chars,
|
|
|
905 |
sizeof(pdf_char_glyph_pair_t), true);
|
|
|
906 |
if (code > 0)
|
|
|
907 |
return 0;
|
|
|
908 |
if (code < 0)
|
|
|
909 |
return code;
|
|
|
910 |
*ppdsubf = NULL;
|
|
|
911 |
}
|
|
|
912 |
code = pdf_find_font_resource(pdev, subfont,
|
|
|
913 |
resourceCIDFont, ppdsubf, cgp);
|
|
|
914 |
if (code < 0)
|
|
|
915 |
return code;
|
|
|
916 |
if (*ppdsubf == NULL) {
|
|
|
917 |
code = pdf_make_font_resource(pdev, subfont, ppdsubf, cgp);
|
|
|
918 |
if (code < 0)
|
|
|
919 |
return code;
|
|
|
920 |
}
|
|
|
921 |
return pdf_attach_font_resource(pdev, subfont, *ppdsubf);
|
|
|
922 |
}
|
|
|
923 |
|
|
|
924 |
/*
|
|
|
925 |
* Refine index of BaseEncoding.
|
|
|
926 |
*/
|
|
|
927 |
private int
|
|
|
928 |
pdf_refine_encoding_index(const gx_device_pdf *pdev, int index, bool is_standard)
|
|
|
929 |
{
|
|
|
930 |
if (pdev->ForOPDFRead) {
|
|
|
931 |
/*
|
|
|
932 |
* Allow Postscript encodings only.
|
|
|
933 |
*/
|
|
|
934 |
switch (index) {
|
|
|
935 |
|
|
|
936 |
case ENCODING_INDEX_STANDARD: return index;
|
|
|
937 |
case ENCODING_INDEX_ISOLATIN1: return index;
|
|
|
938 |
default:
|
|
|
939 |
return ENCODING_INDEX_STANDARD;
|
|
|
940 |
}
|
|
|
941 |
}
|
|
|
942 |
/*
|
|
|
943 |
* Per the PDF 1.3 documentation, there are only 3 BaseEncoding
|
|
|
944 |
* values allowed for non-embedded fonts. Pick one here.
|
|
|
945 |
*/
|
|
|
946 |
switch (index) {
|
|
|
947 |
case ENCODING_INDEX_WINANSI:
|
|
|
948 |
case ENCODING_INDEX_MACROMAN:
|
|
|
949 |
case ENCODING_INDEX_MACEXPERT:
|
|
|
950 |
return index;
|
|
|
951 |
case ENCODING_INDEX_STANDARD:
|
|
|
952 |
if (is_standard)
|
|
|
953 |
return index;
|
|
|
954 |
/* Falls through. */
|
|
|
955 |
default:
|
|
|
956 |
return ENCODING_INDEX_WINANSI;
|
|
|
957 |
}
|
|
|
958 |
}
|
|
|
959 |
|
|
|
960 |
/*
|
|
|
961 |
* Create a font resource object for a gs_font of Type 3.
|
|
|
962 |
*/
|
|
|
963 |
int
|
|
|
964 |
pdf_make_font3_resource(gx_device_pdf *pdev, gs_font *font,
|
|
|
965 |
pdf_font_resource_t **ppdfont)
|
|
|
966 |
{
|
|
|
967 |
const gs_font_base *bfont = (const gs_font_base *)font;
|
|
|
968 |
pdf_font_resource_t *pdfont;
|
|
|
969 |
byte *cached;
|
|
|
970 |
int code;
|
|
|
971 |
|
|
|
972 |
cached = gs_alloc_bytes(pdev->pdf_memory, 256/8, "pdf_make_font3_resource");
|
|
|
973 |
if (cached == NULL)
|
|
|
974 |
return_error(gs_error_VMerror);
|
|
|
975 |
code = font_resource_encoded_alloc(pdev, &pdfont, bfont->id,
|
|
|
976 |
ft_user_defined, pdf_write_contents_bitmap);
|
|
|
977 |
if (code < 0) {
|
|
|
978 |
gs_free_object(pdev->pdf_memory, cached, "pdf_make_font3_resource");
|
|
|
979 |
return code;
|
|
|
980 |
}
|
|
|
981 |
memset(cached, 0, 256 / 8);
|
|
|
982 |
pdfont->u.simple.s.type3.bitmap_font = false;
|
|
|
983 |
pdfont->u.simple.BaseEncoding = pdf_refine_encoding_index(pdev,
|
|
|
984 |
bfont->nearest_encoding_index, true);
|
|
|
985 |
pdfont->u.simple.s.type3.char_procs = NULL;
|
|
|
986 |
pdfont->u.simple.s.type3.cached = cached;
|
|
|
987 |
pdfont->u.simple.s.type3.FontBBox.p.x = (int)floor(bfont->FontBBox.p.x);
|
|
|
988 |
pdfont->u.simple.s.type3.FontBBox.p.y = (int)floor(bfont->FontBBox.p.y);
|
|
|
989 |
pdfont->u.simple.s.type3.FontBBox.q.x = (int)ceil(bfont->FontBBox.q.x);
|
|
|
990 |
pdfont->u.simple.s.type3.FontBBox.q.y = (int)ceil(bfont->FontBBox.q.y);
|
|
|
991 |
pdfont->u.simple.s.type3.FontMatrix = bfont->FontMatrix;
|
|
|
992 |
/* Adobe viewers have a precision problem with small font matrices : */
|
|
|
993 |
while (any_abs(pdfont->u.simple.s.type3.FontMatrix.xx) < 0.001 &&
|
|
|
994 |
any_abs(pdfont->u.simple.s.type3.FontMatrix.xy) < 0.001 &&
|
|
|
995 |
any_abs(pdfont->u.simple.s.type3.FontMatrix.yx) < 0.001 &&
|
|
|
996 |
any_abs(pdfont->u.simple.s.type3.FontMatrix.yy) < 0.001) {
|
|
|
997 |
pdfont->u.simple.s.type3.FontMatrix.xx *= 10;
|
|
|
998 |
pdfont->u.simple.s.type3.FontMatrix.xy *= 10;
|
|
|
999 |
pdfont->u.simple.s.type3.FontMatrix.yx *= 10;
|
|
|
1000 |
pdfont->u.simple.s.type3.FontMatrix.yy *= 10;
|
|
|
1001 |
}
|
|
|
1002 |
*ppdfont = pdfont;
|
|
|
1003 |
return 0;
|
|
|
1004 |
}
|
|
|
1005 |
|
|
|
1006 |
/*
|
|
|
1007 |
* Create a font resource object for a gs_font. Return 1 iff the
|
|
|
1008 |
* font was newly created (it's a roudiment, keeping reverse compatibility).
|
|
|
1009 |
* This procedure is only intended to be called
|
|
|
1010 |
* from a few places in the text code.
|
|
|
1011 |
*/
|
|
|
1012 |
private int
|
|
|
1013 |
pdf_make_font_resource(gx_device_pdf *pdev, gs_font *font,
|
|
|
1014 |
pdf_font_resource_t **ppdfont,
|
|
|
1015 |
pdf_char_glyph_pairs_t *cgp)
|
|
|
1016 |
{
|
|
|
1017 |
int index = -1;
|
|
|
1018 |
int BaseEncoding = ENCODING_INDEX_UNKNOWN;
|
|
|
1019 |
pdf_font_embed_t embed;
|
|
|
1020 |
pdf_font_descriptor_t *pfd = 0;
|
|
|
1021 |
int (*font_alloc)(gx_device_pdf *, pdf_font_resource_t **,
|
|
|
1022 |
gs_id, pdf_font_descriptor_t *);
|
|
|
1023 |
gs_font *base_font = font; /* A roudiment from old code. Keep it for a while. */
|
|
|
1024 |
pdf_font_resource_t *pdfont;
|
|
|
1025 |
pdf_standard_font_t *const psfa =
|
|
|
1026 |
pdev->text->outline_fonts->standard_fonts;
|
|
|
1027 |
int code = 0;
|
|
|
1028 |
|
|
|
1029 |
if (pdev->version < psdf_version_level2_with_TT) {
|
|
|
1030 |
switch(font->FontType) {
|
|
|
1031 |
case ft_TrueType:
|
|
|
1032 |
case ft_CID_TrueType:
|
|
|
1033 |
return_error(gs_error_undefined);
|
|
|
1034 |
default:
|
|
|
1035 |
break;
|
|
|
1036 |
}
|
|
|
1037 |
}
|
|
|
1038 |
if (pdev->ForOPDFRead && !pdev->HaveCIDSystem) {
|
|
|
1039 |
switch(font->FontType) {
|
|
|
1040 |
case ft_CID_encrypted:
|
|
|
1041 |
case ft_CID_TrueType:
|
|
|
1042 |
return_error(gs_error_undefined);
|
|
|
1043 |
default:
|
|
|
1044 |
break;
|
|
|
1045 |
}
|
|
|
1046 |
}
|
|
|
1047 |
if (!pdev->HaveCFF) {
|
|
|
1048 |
if (font->FontType == ft_encrypted2)
|
|
|
1049 |
return_error(gs_error_undefined);
|
|
|
1050 |
}
|
|
|
1051 |
embed = pdf_font_embed_status(pdev, base_font, &index, cgp->s, cgp->num_all_chars);
|
|
|
1052 |
if (embed == FONT_EMBED_STANDARD) {
|
|
|
1053 |
pdf_standard_font_t *psf = &psfa[index];
|
|
|
1054 |
|
|
|
1055 |
if (psf->pdfont == NULL ||
|
|
|
1056 |
!pdf_is_compatible_encoding(pdev, psf->pdfont, font,
|
|
|
1057 |
cgp->s, cgp->num_all_chars)) {
|
|
|
1058 |
code = pdf_font_std_alloc(pdev, ppdfont, (psf->pdfont == NULL), base_font->id,
|
|
|
1059 |
(gs_font_base *)base_font, index);
|
|
|
1060 |
if (code < 0)
|
|
|
1061 |
return code;
|
|
|
1062 |
if (psf->pdfont == NULL)
|
|
|
1063 |
psf->pdfont = *ppdfont;
|
|
|
1064 |
(*ppdfont)->u.simple.BaseEncoding = pdf_refine_encoding_index(pdev,
|
|
|
1065 |
((const gs_font_base *)base_font)->nearest_encoding_index, true);
|
|
|
1066 |
code = 1;
|
|
|
1067 |
} else
|
|
|
1068 |
*ppdfont = psf->pdfont;
|
|
|
1069 |
return code;
|
|
|
1070 |
}
|
|
|
1071 |
|
|
|
1072 |
switch (font->FontType) {
|
|
|
1073 |
case ft_CID_encrypted:
|
|
|
1074 |
case ft_CID_TrueType:
|
|
|
1075 |
font_alloc = pdf_font_cidfont_alloc;
|
|
|
1076 |
break;
|
|
|
1077 |
case ft_encrypted:
|
|
|
1078 |
case ft_encrypted2:
|
|
|
1079 |
case ft_TrueType:
|
|
|
1080 |
font_alloc = pdf_font_simple_alloc;
|
|
|
1081 |
break;
|
|
|
1082 |
case ft_user_defined:
|
|
|
1083 |
code = pdf_make_font3_resource(pdev, font, ppdfont);
|
|
|
1084 |
if (code < 0)
|
|
|
1085 |
return code;
|
|
|
1086 |
return 1;
|
|
|
1087 |
default:
|
|
|
1088 |
return_error(gs_error_invalidfont);
|
|
|
1089 |
}
|
|
|
1090 |
|
|
|
1091 |
/* Create an appropriate font resource and descriptor. */
|
|
|
1092 |
if (embed == FONT_EMBED_YES) {
|
|
|
1093 |
/*
|
|
|
1094 |
* HACK: Acrobat Reader 3 has a bug that makes cmap formats 4
|
|
|
1095 |
* and 6 not work in embedded TrueType fonts. Consequently, it
|
|
|
1096 |
* can only handle embedded TrueType fonts if all the glyphs
|
|
|
1097 |
* referenced by the Encoding have numbers 0-255. Check for
|
|
|
1098 |
* this now.
|
|
|
1099 |
*/
|
|
|
1100 |
if (font->FontType == ft_TrueType &&
|
|
|
1101 |
pdev->CompatibilityLevel <= 1.2
|
|
|
1102 |
) {
|
|
|
1103 |
int i;
|
|
|
1104 |
|
|
|
1105 |
for (i = 0; i <= 0xff; ++i) {
|
|
|
1106 |
gs_glyph glyph =
|
|
|
1107 |
font->procs.encode_char(font, (gs_char)i,
|
|
|
1108 |
GLYPH_SPACE_INDEX);
|
|
|
1109 |
|
|
|
1110 |
if (glyph == GS_NO_GLYPH ||
|
|
|
1111 |
(glyph >= GS_MIN_GLYPH_INDEX &&
|
|
|
1112 |
glyph <= GS_MIN_GLYPH_INDEX + 0xff)
|
|
|
1113 |
)
|
|
|
1114 |
continue;
|
|
|
1115 |
/* Can't embed, punt. */
|
|
|
1116 |
return_error(gs_error_rangecheck);
|
|
|
1117 |
}
|
|
|
1118 |
}
|
|
|
1119 |
}
|
|
|
1120 |
if (font->FontType == ft_encrypted || font->FontType == ft_encrypted2 ||
|
|
|
1121 |
font->FontType == ft_TrueType) {
|
|
|
1122 |
/*
|
|
|
1123 |
* We write True Types with Symbolic flag set.
|
|
|
1124 |
* PDF spec says that "symbolic font should not specify Encoding entry"
|
|
|
1125 |
* (see section 5.5, the article "Encodings for True Type fonts", paragraph 3).
|
|
|
1126 |
* However Acrobat Reader 4,5,6 fail when TT font with no Encoding
|
|
|
1127 |
* appears in a document together with a CID font with a non-standard CMap
|
|
|
1128 |
* (AR 4 and 5 claim "The encoding (CMap) specified by a font is corrupted."
|
|
|
1129 |
* (we read it as "The encoding or CMap specified by a font is corrupted.",
|
|
|
1130 |
* and apply the 1st alternative)). We believe that AR is buggy,
|
|
|
1131 |
* and therefore we write an Encoding with non-CID True Type fonts.
|
|
|
1132 |
* Hopely other viewers can ignore Encoding in such case. Actually in this case
|
|
|
1133 |
* an Encoding doesn't add an useful information.
|
|
|
1134 |
*/
|
|
|
1135 |
BaseEncoding = pdf_refine_encoding_index(pdev,
|
|
|
1136 |
((const gs_font_base *)base_font)->nearest_encoding_index, false);
|
|
|
1137 |
}
|
|
|
1138 |
if ((code = pdf_font_descriptor_alloc(pdev, &pfd,
|
|
|
1139 |
(gs_font_base *)base_font,
|
|
|
1140 |
embed == FONT_EMBED_YES)) < 0 ||
|
|
|
1141 |
(code = font_alloc(pdev, &pdfont, base_font->id, pfd)) < 0
|
|
|
1142 |
)
|
|
|
1143 |
return code;
|
|
|
1144 |
code = 1;
|
|
|
1145 |
|
|
|
1146 |
if (!pdf_is_CID_font(font))
|
|
|
1147 |
pdfont->u.simple.BaseEncoding = BaseEncoding;
|
|
|
1148 |
|
|
|
1149 |
*ppdfont = pdfont;
|
|
|
1150 |
return 1;
|
|
|
1151 |
}
|
|
|
1152 |
|
|
|
1153 |
/* Get a synthesized Type 3 font scale. */
|
|
|
1154 |
void
|
|
|
1155 |
pdf_font3_scale(gx_device_pdf *pdev, gs_font *font, double *scale)
|
|
|
1156 |
{
|
|
|
1157 |
pdf_font_resource_t *pdfont;
|
|
|
1158 |
|
|
|
1159 |
pdf_attached_font_resource(pdev, font, &pdfont, NULL, NULL, NULL, NULL);
|
|
|
1160 |
*scale = pdfont->u.simple.s.type3.FontMatrix.xx;
|
|
|
1161 |
}
|
|
|
1162 |
|
|
|
1163 |
/*
|
|
|
1164 |
* Check for simple font.
|
|
|
1165 |
*/
|
|
|
1166 |
bool
|
|
|
1167 |
pdf_is_simple_font(gs_font *font)
|
|
|
1168 |
{
|
|
|
1169 |
return (font->FontType == ft_encrypted ||
|
|
|
1170 |
font->FontType == ft_encrypted2 ||
|
|
|
1171 |
font->FontType == ft_TrueType ||
|
|
|
1172 |
font->FontType == ft_user_defined);
|
|
|
1173 |
}
|
|
|
1174 |
|
|
|
1175 |
/*
|
|
|
1176 |
* Check for CID font.
|
|
|
1177 |
*/
|
|
|
1178 |
bool
|
|
|
1179 |
pdf_is_CID_font(gs_font *font)
|
|
|
1180 |
{
|
|
|
1181 |
return (font->FontType == ft_CID_encrypted ||
|
|
|
1182 |
font->FontType == ft_CID_TrueType);
|
|
|
1183 |
}
|
|
|
1184 |
|
|
|
1185 |
/*
|
|
|
1186 |
* Enumerate glyphs for a text.
|
|
|
1187 |
*/
|
|
|
1188 |
private int
|
|
|
1189 |
pdf_next_char_glyph(gs_text_enum_t *penum, const gs_string *pstr,
|
|
|
1190 |
/* const */ gs_font *font, bool font_is_simple,
|
|
|
1191 |
gs_char *char_code, gs_char *cid, gs_glyph *glyph)
|
|
|
1192 |
{
|
|
|
1193 |
int code = font->procs.next_char_glyph(penum, char_code, glyph);
|
|
|
1194 |
|
|
|
1195 |
if (code == 2) /* end of string */
|
|
|
1196 |
return code;
|
|
|
1197 |
if (code < 0)
|
|
|
1198 |
return code;
|
|
|
1199 |
if (font_is_simple) {
|
|
|
1200 |
*cid = *char_code;
|
|
|
1201 |
*glyph = font->procs.encode_char(font, *char_code, GLYPH_SPACE_NAME);
|
|
|
1202 |
if (*glyph == GS_NO_GLYPH)
|
|
|
1203 |
return 3;
|
|
|
1204 |
} else {
|
|
|
1205 |
if (*glyph < GS_MIN_CID_GLYPH)
|
|
|
1206 |
return 3; /* Not sure why, copied from scan_cmap_text. */
|
|
|
1207 |
*cid = *glyph - GS_MIN_CID_GLYPH; /* CID */
|
|
|
1208 |
}
|
|
|
1209 |
return 0;
|
|
|
1210 |
}
|
|
|
1211 |
|
|
|
1212 |
private void
|
|
|
1213 |
store_glyphs(pdf_char_glyph_pairs_t *cgp,
|
|
|
1214 |
byte *glyph_usage, int char_cache_size,
|
|
|
1215 |
gs_char char_code, gs_char cid, gs_glyph glyph)
|
|
|
1216 |
{
|
|
|
1217 |
int j;
|
|
|
1218 |
|
|
|
1219 |
for (j = 0; j < cgp->num_all_chars; j++)
|
|
|
1220 |
if (cgp->s[j].chr == cid)
|
|
|
1221 |
break;
|
|
|
1222 |
if (j < cgp->num_all_chars)
|
|
|
1223 |
return;
|
|
|
1224 |
cgp->s[cgp->num_all_chars].glyph = glyph;
|
|
|
1225 |
cgp->s[cgp->num_all_chars].chr = char_code;
|
|
|
1226 |
cgp->num_all_chars++;
|
|
|
1227 |
if (glyph_usage == 0 || !(glyph_usage[cid / 8] & (0x80 >> (cid & 7)))) {
|
|
|
1228 |
cgp->s[cgp->unused_offset + cgp->num_unused_chars].glyph = glyph;
|
|
|
1229 |
cgp->s[cgp->unused_offset + cgp->num_unused_chars].chr = char_code;
|
|
|
1230 |
cgp->num_unused_chars++;
|
|
|
1231 |
}
|
|
|
1232 |
/* We are disliked that gs_copied_can_copy_glyphs can get redundant
|
|
|
1233 |
* glyphs, if Encoding specifies several codes for same glyph.
|
|
|
1234 |
* But we need the positional correspondence
|
|
|
1235 |
* of glyphs to codes for pdf_is_compatible_encoding.
|
|
|
1236 |
* Redundant glyphs isn't a big payment for it
|
|
|
1237 |
* because they happen seldom.
|
|
|
1238 |
*/
|
|
|
1239 |
}
|
|
|
1240 |
|
|
|
1241 |
/* Allocate storage for the glyph set of the text. */
|
|
|
1242 |
private int
|
|
|
1243 |
pdf_alloc_text_glyphs_table(gx_device_pdf *pdev, pdf_text_enum_t *penum, const gs_string *pstr)
|
|
|
1244 |
{
|
|
|
1245 |
const int go = (pstr != NULL ? pstr->size : penum->text.size);
|
|
|
1246 |
const int struct_size = sizeof(pdf_char_glyph_pairs_t) +
|
|
|
1247 |
sizeof(pdf_char_glyph_pair_t) * (2 * go - 1);
|
|
|
1248 |
pdf_char_glyph_pairs_t *cgp = (pdf_char_glyph_pairs_t *)gs_alloc_bytes(penum->memory,
|
|
|
1249 |
struct_size, "pdf_alloc_text_glyphs_table");
|
|
|
1250 |
if (cgp == NULL)
|
|
|
1251 |
return_error(gs_error_VMerror);
|
|
|
1252 |
penum->cgp = cgp;
|
|
|
1253 |
cgp->unused_offset = go;
|
|
|
1254 |
cgp->num_all_chars = 0;
|
|
|
1255 |
cgp->num_unused_chars = 0;
|
|
|
1256 |
return 0;
|
|
|
1257 |
}
|
|
|
1258 |
|
|
|
1259 |
/* Build the glyph set of the text. */
|
|
|
1260 |
private int
|
|
|
1261 |
pdf_make_text_glyphs_table(pdf_text_enum_t *penum, const gs_string *pstr,
|
|
|
1262 |
byte *glyph_usage, int char_cache_size)
|
|
|
1263 |
{
|
|
|
1264 |
gs_text_enum_t scan = *(gs_text_enum_t *)penum;
|
|
|
1265 |
gs_font *font = (gs_font *)penum->current_font;
|
|
|
1266 |
bool font_is_simple = pdf_is_simple_font(font);
|
|
|
1267 |
pdf_char_glyph_pairs_t *cgp = penum->cgp;
|
|
|
1268 |
gs_char char_code, cid;
|
|
|
1269 |
gs_glyph glyph;
|
|
|
1270 |
int code;
|
|
|
1271 |
|
|
|
1272 |
cgp->num_unused_chars = 0;
|
|
|
1273 |
cgp->num_all_chars = 0;
|
|
|
1274 |
if (pstr != NULL) {
|
|
|
1275 |
scan.text.data.bytes = pstr->data;
|
|
|
1276 |
scan.text.size = pstr->size;
|
|
|
1277 |
scan.index = 0;
|
|
|
1278 |
/* if TEXT_FROM_CHARS the data was converted to bytes earlier */
|
|
|
1279 |
if ( scan.text.operation & TEXT_FROM_CHARS )
|
|
|
1280 |
scan.text.operation = ((scan.text.operation & ~TEXT_FROM_CHARS) | TEXT_FROM_STRING);
|
|
|
1281 |
}
|
|
|
1282 |
for (;;) {
|
|
|
1283 |
code = pdf_next_char_glyph(&scan, pstr, font, font_is_simple,
|
|
|
1284 |
&char_code, &cid, &glyph);
|
|
|
1285 |
if (code == 2) /* end of string */
|
|
|
1286 |
break;
|
|
|
1287 |
if (code == 3) /* no glyph */
|
|
|
1288 |
continue;
|
|
|
1289 |
if (code < 0)
|
|
|
1290 |
return code;
|
|
|
1291 |
if (cgp->num_all_chars > cgp->unused_offset)
|
|
|
1292 |
return_error(gs_error_unregistered); /* Must not happen. */
|
|
|
1293 |
if (glyph_usage != 0 && cid > char_cache_size)
|
|
|
1294 |
continue;
|
|
|
1295 |
store_glyphs(cgp, glyph_usage, char_cache_size,
|
|
|
1296 |
char_code, cid, glyph);
|
|
|
1297 |
}
|
|
|
1298 |
return 0;
|
|
|
1299 |
}
|
|
|
1300 |
|
|
|
1301 |
/* Build the glyph set of the glyphshow text, and re_encode the text. */
|
|
|
1302 |
private int
|
|
|
1303 |
pdf_make_text_glyphs_table_unencoded(pdf_char_glyph_pairs_t *cgp,
|
|
|
1304 |
gs_font *font, const gs_string *pstr, const gs_glyph *gdata,
|
|
|
1305 |
int *ps_encoding_index)
|
|
|
1306 |
{
|
|
|
1307 |
int i, ei;
|
|
|
1308 |
gs_char ch;
|
|
|
1309 |
gs_const_string gname;
|
|
|
1310 |
gs_glyph *gid = (gs_glyph *)pstr->data; /* pdf_text_process allocs enough space. */
|
|
|
1311 |
|
|
|
1312 |
/* Translate glyph name indices into gscencs.c indices. */
|
|
|
1313 |
for (i = 0; i < pstr->size; i++) {
|
|
|
1314 |
int code = font->procs.glyph_name(font, gdata[i], &gname);
|
|
|
1315 |
|
|
|
1316 |
if (code < 0)
|
|
|
1317 |
return code;
|
|
|
1318 |
gid[i] = gs_c_name_glyph(gname.data, gname.size);
|
|
|
1319 |
if (gid[i] == GS_NO_GLYPH)
|
|
|
1320 |
return_error(gs_error_rangecheck);
|
|
|
1321 |
}
|
|
|
1322 |
|
|
|
1323 |
/* Find an acceptable encodng. */
|
|
|
1324 |
for (ei = 0; gs_c_known_encodings[ei]; ei++) {
|
|
|
1325 |
cgp->num_unused_chars = 0;
|
|
|
1326 |
cgp->num_all_chars = 0;
|
|
|
1327 |
for (i = 0; i < pstr->size; i++) {
|
|
|
1328 |
ch = gs_c_decode(gid[i], ei);
|
|
|
1329 |
if (ch == GS_NO_CHAR)
|
|
|
1330 |
break;
|
|
|
1331 |
/* pstr->data[i] = (byte)ch; Can't do because pstr->data and gid
|
|
|
1332 |
are same pointer. Will do in a separate pass below. */
|
|
|
1333 |
store_glyphs(cgp, NULL, 0,
|
|
|
1334 |
ch, ch, gdata[i]);
|
|
|
1335 |
}
|
|
|
1336 |
*ps_encoding_index = ei;
|
|
|
1337 |
if (i == pstr->size) {
|
|
|
1338 |
for (i = 0; i < pstr->size; i++)
|
|
|
1339 |
pstr->data[i] = (byte)gs_c_decode(gid[i], ei);
|
|
|
1340 |
return 0;
|
|
|
1341 |
}
|
|
|
1342 |
}
|
|
|
1343 |
return_error(gs_error_rangecheck);
|
|
|
1344 |
}
|
|
|
1345 |
|
|
|
1346 |
|
|
|
1347 |
/* Get/make font resource for the font with a known encoding. */
|
|
|
1348 |
private int
|
|
|
1349 |
pdf_obtain_font_resource_encoded(gx_device_pdf *pdev, gs_font *font,
|
|
|
1350 |
pdf_font_resource_t **ppdfont, pdf_char_glyph_pairs_t *cgp)
|
|
|
1351 |
{
|
|
|
1352 |
int code;
|
|
|
1353 |
pdf_font_resource_t *pdfont_not_allowed = NULL;
|
|
|
1354 |
|
|
|
1355 |
if (*ppdfont != 0) {
|
|
|
1356 |
gs_font_base *cfont = pdf_font_resource_font(*ppdfont, false);
|
|
|
1357 |
|
|
|
1358 |
if (font->FontType != ft_user_defined) {
|
|
|
1359 |
code = gs_copied_can_copy_glyphs((gs_font *)cfont, font,
|
|
|
1360 |
&cgp->s[cgp->unused_offset].glyph, cgp->num_unused_chars,
|
|
|
1361 |
sizeof(pdf_char_glyph_pair_t), true);
|
|
|
1362 |
if (code < 0)
|
|
|
1363 |
return code;
|
|
|
1364 |
} else
|
|
|
1365 |
code = 1;
|
|
|
1366 |
if (code == 0) {
|
|
|
1367 |
pdfont_not_allowed = *ppdfont;
|
|
|
1368 |
*ppdfont = 0;
|
|
|
1369 |
} else if(!pdf_is_compatible_encoding(pdev, *ppdfont, font,
|
|
|
1370 |
cgp->s, cgp->num_all_chars)) {
|
|
|
1371 |
pdfont_not_allowed = *ppdfont;
|
|
|
1372 |
*ppdfont = 0;
|
|
|
1373 |
}
|
|
|
1374 |
}
|
|
|
1375 |
if (*ppdfont == 0) {
|
|
|
1376 |
gs_font *base_font = font;
|
|
|
1377 |
gs_font *below;
|
|
|
1378 |
bool same_encoding = true;
|
|
|
1379 |
|
|
|
1380 |
/*
|
|
|
1381 |
* Find the "lowest" base font that has the same outlines.
|
|
|
1382 |
* We use its FontName for font resource.
|
|
|
1383 |
*/
|
|
|
1384 |
while ((below = base_font->base) != base_font &&
|
|
|
1385 |
base_font->procs.same_font(base_font, below, FONT_SAME_OUTLINES))
|
|
|
1386 |
base_font = below;
|
|
|
1387 |
if (base_font != font)
|
|
|
1388 |
same_encoding = ((base_font->procs.same_font(base_font, font,
|
|
|
1389 |
FONT_SAME_ENCODING) & FONT_SAME_ENCODING) != 0);
|
|
|
1390 |
/* Find or make font resource. */
|
|
|
1391 |
pdf_attached_font_resource(pdev, base_font, ppdfont, NULL, NULL, NULL, NULL);
|
|
|
1392 |
if (*ppdfont != NULL && base_font != font) {
|
|
|
1393 |
if (pdfont_not_allowed == *ppdfont)
|
|
|
1394 |
*ppdfont = NULL;
|
|
|
1395 |
else if(!pdf_is_compatible_encoding(pdev, *ppdfont,
|
|
|
1396 |
base_font, cgp->s, cgp->num_all_chars))
|
|
|
1397 |
*ppdfont = NULL;
|
|
|
1398 |
}
|
|
|
1399 |
if (*ppdfont == NULL || *ppdfont == pdfont_not_allowed) {
|
|
|
1400 |
pdf_resource_type_t type =
|
|
|
1401 |
(pdf_is_CID_font(base_font) ? resourceCIDFont
|
|
|
1402 |
: resourceFont);
|
|
|
1403 |
*ppdfont = NULL;
|
|
|
1404 |
code = pdf_find_font_resource(pdev, base_font, type, ppdfont, cgp);
|
|
|
1405 |
if (code < 0)
|
|
|
1406 |
return code;
|
|
|
1407 |
if (*ppdfont == NULL) {
|
|
|
1408 |
code = pdf_make_font_resource(pdev, base_font, ppdfont, cgp);
|
|
|
1409 |
if (code < 0)
|
|
|
1410 |
return code;
|
|
|
1411 |
}
|
|
|
1412 |
if (base_font != font && same_encoding) {
|
|
|
1413 |
code = pdf_attach_font_resource(pdev, base_font, *ppdfont);
|
|
|
1414 |
if (code < 0)
|
|
|
1415 |
return code;
|
|
|
1416 |
}
|
|
|
1417 |
}
|
|
|
1418 |
code = pdf_attach_font_resource(pdev, font, *ppdfont);
|
|
|
1419 |
if (code < 0)
|
|
|
1420 |
return code;
|
|
|
1421 |
}
|
|
|
1422 |
return 0;
|
|
|
1423 |
}
|
|
|
1424 |
|
|
|
1425 |
/* Mark glyphs used in the text with the font resource. */
|
|
|
1426 |
private int
|
|
|
1427 |
pdf_mark_text_glyphs(const gs_text_enum_t *penum, const gs_string *pstr,
|
|
|
1428 |
byte *glyph_usage, int char_cache_size)
|
|
|
1429 |
{
|
|
|
1430 |
gs_text_enum_t scan = *penum;
|
|
|
1431 |
gs_font *font = (gs_font *)penum->current_font;
|
|
|
1432 |
bool font_is_simple = pdf_is_simple_font(font);
|
|
|
1433 |
gs_char char_code, cid;
|
|
|
1434 |
gs_glyph glyph;
|
|
|
1435 |
|
|
|
1436 |
if (pstr != NULL) {
|
|
|
1437 |
scan.text.data.bytes = pstr->data;
|
|
|
1438 |
scan.text.size = pstr->size;
|
|
|
1439 |
scan.index = 0;
|
|
|
1440 |
/* if TEXT_FROM_CHARS the data was converted to bytes earlier */
|
|
|
1441 |
if ( scan.text.operation & TEXT_FROM_CHARS )
|
|
|
1442 |
scan.text.operation =
|
|
|
1443 |
((scan.text.operation & ~TEXT_FROM_CHARS) | TEXT_FROM_STRING);
|
|
|
1444 |
}
|
|
|
1445 |
for (;;) {
|
|
|
1446 |
int code = pdf_next_char_glyph(&scan, pstr, font, font_is_simple,
|
|
|
1447 |
&char_code, &cid, &glyph);
|
|
|
1448 |
|
|
|
1449 |
if (code == 2) /* end of string */
|
|
|
1450 |
break;
|
|
|
1451 |
if (code == 3) /* no glyph */
|
|
|
1452 |
continue;
|
|
|
1453 |
if (code < 0)
|
|
|
1454 |
return code;
|
|
|
1455 |
if (glyph_usage != 0 && cid >= char_cache_size)
|
|
|
1456 |
continue;
|
|
|
1457 |
glyph_usage[cid / 8] |= 0x80 >> (cid & 7);
|
|
|
1458 |
}
|
|
|
1459 |
return 0;
|
|
|
1460 |
}
|
|
|
1461 |
|
|
|
1462 |
/* Mark glyphs used in the glyphshow text with the font resource. */
|
|
|
1463 |
private int
|
|
|
1464 |
pdf_mark_text_glyphs_unencoded(const gs_text_enum_t *penum, const gs_string *pstr,
|
|
|
1465 |
byte *glyph_usage, int char_cache_size)
|
|
|
1466 |
{
|
|
|
1467 |
int i;
|
|
|
1468 |
|
|
|
1469 |
for(i = 0; i < pstr->size; i++) {
|
|
|
1470 |
byte ch = pstr->data[i];
|
|
|
1471 |
|
|
|
1472 |
if (ch >= char_cache_size)
|
|
|
1473 |
return_error(gs_error_rangecheck);
|
|
|
1474 |
glyph_usage[ch / 8] |= 0x80 >> (ch & 7);
|
|
|
1475 |
}
|
|
|
1476 |
return 0;
|
|
|
1477 |
}
|
|
|
1478 |
|
|
|
1479 |
/*
|
|
|
1480 |
* Create or find a font resource object for a text.
|
|
|
1481 |
*/
|
|
|
1482 |
int
|
|
|
1483 |
pdf_obtain_font_resource(pdf_text_enum_t *penum,
|
|
|
1484 |
const gs_string *pstr, pdf_font_resource_t **ppdfont)
|
|
|
1485 |
{
|
|
|
1486 |
gx_device_pdf *pdev = (gx_device_pdf *)penum->dev;
|
|
|
1487 |
gs_font *font = (gs_font *)penum->current_font;
|
|
|
1488 |
byte *glyph_usage = 0;
|
|
|
1489 |
double *real_widths;
|
|
|
1490 |
int char_cache_size, width_cache_size;
|
|
|
1491 |
int code;
|
|
|
1492 |
|
|
|
1493 |
if (font->FontType == ft_composite) {
|
|
|
1494 |
/* Must not happen, because we always split composite fonts into descendents. */
|
|
|
1495 |
return_error(gs_error_unregistered);
|
|
|
1496 |
}
|
|
|
1497 |
code = pdf_attached_font_resource(pdev, font, ppdfont,
|
|
|
1498 |
&glyph_usage, &real_widths, &char_cache_size, &width_cache_size);
|
|
|
1499 |
/* *ppdfont is NULL if no resource attached. */
|
|
|
1500 |
if (code < 0)
|
|
|
1501 |
return code;
|
|
|
1502 |
if (penum->cgp == NULL) {
|
|
|
1503 |
code = pdf_alloc_text_glyphs_table(pdev, penum, pstr);
|
|
|
1504 |
if (code < 0)
|
|
|
1505 |
return code;
|
|
|
1506 |
code = pdf_make_text_glyphs_table(penum, pstr,
|
|
|
1507 |
glyph_usage, char_cache_size);
|
|
|
1508 |
if (code < 0)
|
|
|
1509 |
return code;
|
|
|
1510 |
}
|
|
|
1511 |
code = pdf_obtain_font_resource_encoded(pdev, font, ppdfont, penum->cgp);
|
|
|
1512 |
if (code < 0)
|
|
|
1513 |
return code;
|
|
|
1514 |
code = pdf_attached_font_resource(pdev, font, ppdfont,
|
|
|
1515 |
&glyph_usage, &real_widths, &char_cache_size, &width_cache_size);
|
|
|
1516 |
if (code < 0)
|
|
|
1517 |
return code;
|
|
|
1518 |
return pdf_mark_text_glyphs((const gs_text_enum_t *)penum, pstr, glyph_usage, char_cache_size);
|
|
|
1519 |
}
|
|
|
1520 |
|
|
|
1521 |
/*
|
|
|
1522 |
* Create or find a font resource object for a glyphshow text.
|
|
|
1523 |
*/
|
|
|
1524 |
int
|
|
|
1525 |
pdf_obtain_font_resource_unencoded(pdf_text_enum_t *penum,
|
|
|
1526 |
const gs_string *pstr, pdf_font_resource_t **ppdfont, const gs_glyph *gdata)
|
|
|
1527 |
{
|
|
|
1528 |
gx_device_pdf *pdev = (gx_device_pdf *)penum->dev;
|
|
|
1529 |
gs_font *font = (gs_font *)penum->current_font;
|
|
|
1530 |
byte *glyph_usage = 0;
|
|
|
1531 |
double *real_widths = 0;
|
|
|
1532 |
int char_cache_size = 0, width_cache_size = 0;
|
|
|
1533 |
int code, ps_encoding_index;
|
|
|
1534 |
|
|
|
1535 |
if (font->FontType == ft_composite) {
|
|
|
1536 |
/* Must not happen, because we always split composite fonts into descendents. */
|
|
|
1537 |
return_error(gs_error_unregistered);
|
|
|
1538 |
}
|
|
|
1539 |
code = pdf_attached_font_resource(pdev, font, ppdfont,
|
|
|
1540 |
&glyph_usage, &real_widths, &char_cache_size, &width_cache_size);
|
|
|
1541 |
if (code < 0)
|
|
|
1542 |
return code;
|
|
|
1543 |
/* *ppdfont is NULL if no resource attached. */
|
|
|
1544 |
if (penum->cgp == NULL) {
|
|
|
1545 |
code = pdf_alloc_text_glyphs_table(pdev, penum, pstr);
|
|
|
1546 |
if (code < 0)
|
|
|
1547 |
return code;
|
|
|
1548 |
code = pdf_make_text_glyphs_table_unencoded(penum->cgp, font, pstr, gdata,
|
|
|
1549 |
&ps_encoding_index);
|
|
|
1550 |
if (code < 0)
|
|
|
1551 |
return code;
|
|
|
1552 |
}
|
|
|
1553 |
code = pdf_obtain_font_resource_encoded(pdev, font, ppdfont, penum->cgp);
|
|
|
1554 |
if (code < 0)
|
|
|
1555 |
return code;
|
|
|
1556 |
code = pdf_attached_font_resource(pdev, font, ppdfont,
|
|
|
1557 |
&glyph_usage, &real_widths, &char_cache_size, &width_cache_size);
|
|
|
1558 |
if (code < 0)
|
|
|
1559 |
return code;
|
|
|
1560 |
return pdf_mark_text_glyphs_unencoded((const gs_text_enum_t *)penum,
|
|
|
1561 |
pstr, glyph_usage, char_cache_size);
|
|
|
1562 |
}
|
|
|
1563 |
|
|
|
1564 |
private inline bool
|
|
|
1565 |
strings_equal(const gs_const_string *s1, const gs_const_string *s2)
|
|
|
1566 |
{
|
|
|
1567 |
return s1->size == s2->size &&
|
|
|
1568 |
!memcmp(s1->data, s2->data, s1->size);
|
|
|
1569 |
}
|
|
|
1570 |
|
|
|
1571 |
/*
|
|
|
1572 |
* Create or find a parent Type 0 font resource object for a CID font resource.
|
|
|
1573 |
*/
|
|
|
1574 |
int
|
|
|
1575 |
pdf_obtain_parent_type0_font_resource(gx_device_pdf *pdev, pdf_font_resource_t *pdsubf,
|
|
|
1576 |
const gs_const_string *CMapName, pdf_font_resource_t **pdfont)
|
|
|
1577 |
{
|
|
|
1578 |
if (pdsubf->u.cidfont.parent != 0 &&
|
|
|
1579 |
strings_equal(CMapName, &pdsubf->u.cidfont.parent->u.type0.CMapName))
|
|
|
1580 |
*pdfont = pdsubf->u.cidfont.parent;
|
|
|
1581 |
else {
|
|
|
1582 |
/*
|
|
|
1583 |
* PDF spec 1.4 section 5.6 "Composite Fonts" says :
|
|
|
1584 |
*
|
|
|
1585 |
* PDF 1.2 introduces a general architecture for composite fonts that theoretically
|
|
|
1586 |
* allows a Type 0 font to have multiple descendants,which might themselves be
|
|
|
1587 |
* Type 0 fonts.However,in versions up to and including PDF 1.4,only a single
|
|
|
1588 |
* descendant is allowed,which must be a CIDFont (not a font).This restriction
|
|
|
1589 |
* may be relaxed in a future PDF version.
|
|
|
1590 |
*/
|
|
|
1591 |
|
|
|
1592 |
if (pdsubf->u.cidfont.parent == NULL ||
|
|
|
1593 |
pdf_find_type0_font_resource(pdev, pdsubf, CMapName, pdfont) <= 0) {
|
|
|
1594 |
int code = pdf_font_type0_alloc(pdev, pdfont, gs_no_id, pdsubf, CMapName);
|
|
|
1595 |
|
|
|
1596 |
if (code < 0)
|
|
|
1597 |
return code;
|
|
|
1598 |
}
|
|
|
1599 |
pdsubf->u.cidfont.parent = *pdfont;
|
|
|
1600 |
}
|
|
|
1601 |
return 0;
|
|
|
1602 |
}
|
|
|
1603 |
|
|
|
1604 |
/*
|
|
|
1605 |
* Compute the cached values in the text processing state from the text
|
|
|
1606 |
* parameters, current_font, and pis->ctm. Return either an error code (<
|
|
|
1607 |
* 0) or a mask of operation attributes that the caller must emulate.
|
|
|
1608 |
* Currently the only such attributes are TEXT_ADD_TO_ALL_WIDTHS and
|
|
|
1609 |
* TEXT_ADD_TO_SPACE_WIDTH. Note that this procedure fills in all the
|
|
|
1610 |
* values in ppts->values, not just the ones that need to be set now.
|
|
|
1611 |
*/
|
|
|
1612 |
private int
|
|
|
1613 |
transform_delta_inverse(const gs_point *pdelta, const gs_matrix *pmat,
|
|
|
1614 |
gs_point *ppt)
|
|
|
1615 |
{
|
|
|
1616 |
int code = gs_distance_transform_inverse(pdelta->x, pdelta->y, pmat, ppt);
|
|
|
1617 |
gs_point delta;
|
|
|
1618 |
|
|
|
1619 |
if (code < 0)
|
|
|
1620 |
return code;
|
|
|
1621 |
if (ppt->y == 0)
|
|
|
1622 |
return 0;
|
|
|
1623 |
/* Check for numerical fuzz. */
|
|
|
1624 |
code = gs_distance_transform(ppt->x, 0.0, pmat, &delta);
|
|
|
1625 |
if (code < 0)
|
|
|
1626 |
return 0; /* punt */
|
|
|
1627 |
if (fabs(delta.x - pdelta->x) < 0.01 && fabs(delta.y - pdelta->y) < 0.01) {
|
|
|
1628 |
/* Close enough to y == 0: device space error < 0.01 pixel. */
|
|
|
1629 |
ppt->y = 0;
|
|
|
1630 |
}
|
|
|
1631 |
return 0;
|
|
|
1632 |
}
|
|
|
1633 |
int
|
|
|
1634 |
pdf_update_text_state(pdf_text_process_state_t *ppts,
|
|
|
1635 |
const pdf_text_enum_t *penum,
|
|
|
1636 |
pdf_font_resource_t *pdfont, const gs_matrix *pfmat)
|
|
|
1637 |
{
|
|
|
1638 |
gx_device_pdf *const pdev = (gx_device_pdf *)penum->dev;
|
|
|
1639 |
gs_font *font = penum->current_font;
|
|
|
1640 |
gs_fixed_point cpt;
|
|
|
1641 |
gs_matrix orig_matrix, smat, tmat;
|
|
|
1642 |
double
|
|
|
1643 |
sx = pdev->HWResolution[0] / 72.0,
|
|
|
1644 |
sy = pdev->HWResolution[1] / 72.0;
|
|
|
1645 |
float size;
|
|
|
1646 |
float c_s = 0, w_s = 0;
|
|
|
1647 |
int mask = 0;
|
|
|
1648 |
int code = gx_path_current_point(penum->path, &cpt);
|
|
|
1649 |
|
|
|
1650 |
if (code < 0)
|
|
|
1651 |
return code;
|
|
|
1652 |
|
|
|
1653 |
/* Get the original matrix of the base font. */
|
|
|
1654 |
|
|
|
1655 |
{
|
|
|
1656 |
gs_font_base *cfont = pdf_font_resource_font(pdfont, false);
|
|
|
1657 |
|
|
|
1658 |
if (pdfont->FontType == ft_user_defined)
|
|
|
1659 |
orig_matrix = pdfont->u.simple.s.type3.FontMatrix;
|
|
|
1660 |
else if (cfont != 0) {
|
|
|
1661 |
/*
|
|
|
1662 |
* The text matrix to be computed relatively to the
|
|
|
1663 |
* embedded font matrix.
|
|
|
1664 |
*/
|
|
|
1665 |
orig_matrix = cfont->FontMatrix;
|
|
|
1666 |
} else {
|
|
|
1667 |
/*
|
|
|
1668 |
* We don't embed the font.
|
|
|
1669 |
* The text matrix to be computed relatively to
|
|
|
1670 |
* standard font matrix.
|
|
|
1671 |
*/
|
|
|
1672 |
pdf_font_orig_matrix(font, &orig_matrix);
|
|
|
1673 |
}
|
|
|
1674 |
}
|
|
|
1675 |
|
|
|
1676 |
/* Compute the scaling matrix and combined matrix. */
|
|
|
1677 |
|
|
|
1678 |
gs_matrix_invert(&orig_matrix, &smat);
|
|
|
1679 |
gs_matrix_multiply(&smat, pfmat, &smat);
|
|
|
1680 |
tmat = ctm_only(penum->pis);
|
|
|
1681 |
tmat.tx = tmat.ty = 0;
|
|
|
1682 |
gs_matrix_multiply(&smat, &tmat, &tmat);
|
|
|
1683 |
|
|
|
1684 |
/* Try to find a reasonable size value. This isn't necessary, */
|
|
|
1685 |
/* but it's worth a little effort. */
|
|
|
1686 |
|
|
|
1687 |
size = hypot(tmat.yx, tmat.yy) / sy;
|
|
|
1688 |
if (size < 0.01)
|
|
|
1689 |
size = hypot(tmat.xx, tmat.xy) / sx;
|
|
|
1690 |
if (size < 0.01)
|
|
|
1691 |
size = 1;
|
|
|
1692 |
|
|
|
1693 |
/* Check for spacing parameters we can handle, and transform them. */
|
|
|
1694 |
|
|
|
1695 |
if (penum->text.operation & TEXT_ADD_TO_ALL_WIDTHS) {
|
|
|
1696 |
if (penum->current_font->WMode == 0) {
|
|
|
1697 |
gs_point pt;
|
|
|
1698 |
|
|
|
1699 |
code = transform_delta_inverse(&penum->text.delta_all, &smat, &pt);
|
|
|
1700 |
if (code >= 0 && pt.y == 0)
|
|
|
1701 |
c_s = pt.x * size;
|
|
|
1702 |
else
|
|
|
1703 |
mask |= TEXT_ADD_TO_ALL_WIDTHS;
|
|
|
1704 |
}
|
|
|
1705 |
else
|
|
|
1706 |
mask |= TEXT_ADD_TO_ALL_WIDTHS;
|
|
|
1707 |
}
|
|
|
1708 |
|
|
|
1709 |
if (penum->text.operation & TEXT_ADD_TO_SPACE_WIDTH) {
|
|
|
1710 |
gs_point pt;
|
|
|
1711 |
|
|
|
1712 |
code = transform_delta_inverse(&penum->text.delta_space, &smat, &pt);
|
|
|
1713 |
if (code >= 0 && pt.y == 0 && penum->text.space.s_char == 32)
|
|
|
1714 |
w_s = pt.x * size;
|
|
|
1715 |
else
|
|
|
1716 |
mask |= TEXT_ADD_TO_SPACE_WIDTH;
|
|
|
1717 |
}
|
|
|
1718 |
/* Store the updated values. */
|
|
|
1719 |
|
|
|
1720 |
tmat.xx /= size;
|
|
|
1721 |
tmat.xy /= size;
|
|
|
1722 |
tmat.yx /= size;
|
|
|
1723 |
tmat.yy /= size;
|
|
|
1724 |
tmat.tx += fixed2float(cpt.x);
|
|
|
1725 |
tmat.ty += fixed2float(cpt.y);
|
|
|
1726 |
|
|
|
1727 |
ppts->values.character_spacing = c_s;
|
|
|
1728 |
ppts->values.pdfont = pdfont;
|
|
|
1729 |
ppts->values.size = size;
|
|
|
1730 |
ppts->values.matrix = tmat;
|
|
|
1731 |
ppts->values.render_mode = (penum->pis->text_rendering_mode == 3 ? 3 :
|
|
|
1732 |
font->PaintType == 0 ? 0 : 1);
|
|
|
1733 |
ppts->values.word_spacing = w_s;
|
|
|
1734 |
ppts->font = font;
|
|
|
1735 |
|
|
|
1736 |
code = pdf_set_text_process_state(pdev, (const gs_text_enum_t *)penum,
|
|
|
1737 |
ppts);
|
|
|
1738 |
return (code < 0 ? code : mask);
|
|
|
1739 |
}
|
|
|
1740 |
|
|
|
1741 |
/*
|
|
|
1742 |
* Set up commands to make the output state match the processing state.
|
|
|
1743 |
* General graphics state commands are written now; text state commands
|
|
|
1744 |
* are written later.
|
|
|
1745 |
*/
|
|
|
1746 |
private double
|
|
|
1747 |
font_matrix_scaling(const gs_font *font)
|
|
|
1748 |
{
|
|
|
1749 |
return fabs((font->FontMatrix.yy != 0 ? font->FontMatrix.yy :
|
|
|
1750 |
font->FontMatrix.yx));
|
|
|
1751 |
}
|
|
|
1752 |
int
|
|
|
1753 |
pdf_set_text_process_state(gx_device_pdf *pdev,
|
|
|
1754 |
const gs_text_enum_t *pte, /* for pdcolor, pis */
|
|
|
1755 |
pdf_text_process_state_t *ppts)
|
|
|
1756 |
{
|
|
|
1757 |
/*
|
|
|
1758 |
* Setting the stroke parameters may exit text mode, causing the
|
|
|
1759 |
* settings of the text parameters to be lost. Therefore, we set the
|
|
|
1760 |
* stroke parameters first.
|
|
|
1761 |
*/
|
|
|
1762 |
if (pdf_render_mode_uses_stroke(pdev, &ppts->values)) {
|
|
|
1763 |
/* Write all the parameters for stroking. */
|
|
|
1764 |
gs_imager_state *pis = pte->pis;
|
|
|
1765 |
float save_width = pis->line_params.half_width;
|
|
|
1766 |
const gs_font *font = ppts->font;
|
|
|
1767 |
double scaled_width = font->StrokeWidth;
|
|
|
1768 |
int code;
|
|
|
1769 |
|
|
|
1770 |
/* Note that we compute pis->line_params.half_width in device space,
|
|
|
1771 |
* even though it logically represents a value in user space.
|
|
|
1772 |
* The 'scale' value compensates for this.
|
|
|
1773 |
*/
|
|
|
1774 |
scaled_width *= font_matrix_scaling(font);
|
|
|
1775 |
scaled_width *= min(hypot(pte->pis->ctm.xx, pte->pis->ctm.yx) /
|
|
|
1776 |
pdev->HWResolution[0] * pdev->HWResolution[1],
|
|
|
1777 |
hypot(pte->pis->ctm.xy, pte->pis->ctm.yy));
|
|
|
1778 |
pis->line_params.half_width = scaled_width / 2;
|
|
|
1779 |
code = pdf_prepare_stroke(pdev, pis);
|
|
|
1780 |
if (code >= 0) {
|
|
|
1781 |
/*
|
|
|
1782 |
* See stream_to_text in gdevpdfu.c re the computation of
|
|
|
1783 |
* the scaling value.
|
|
|
1784 |
*/
|
|
|
1785 |
double scale = 72.0 / pdev->HWResolution[1];
|
|
|
1786 |
|
|
|
1787 |
code = gdev_vector_prepare_stroke((gx_device_vector *)pdev,
|
|
|
1788 |
pis, NULL, NULL, scale);
|
|
|
1789 |
}
|
|
|
1790 |
pis->line_params.half_width = save_width;
|
|
|
1791 |
if (code < 0)
|
|
|
1792 |
return code;
|
|
|
1793 |
}
|
|
|
1794 |
|
|
|
1795 |
/* Now set all the other parameters. */
|
|
|
1796 |
|
|
|
1797 |
return pdf_set_text_state_values(pdev, &ppts->values);
|
|
|
1798 |
}
|
|
|
1799 |
|
|
|
1800 |
private int
|
|
|
1801 |
store_glyph_width(pdf_glyph_width_t *pwidth, int wmode, double scale,
|
|
|
1802 |
const gs_glyph_info_t *pinfo)
|
|
|
1803 |
{
|
|
|
1804 |
double w, v;
|
|
|
1805 |
|
|
|
1806 |
pwidth->xy.x = pinfo->width[wmode].x * scale;
|
|
|
1807 |
pwidth->xy.y = pinfo->width[wmode].y * scale;
|
|
|
1808 |
if (wmode)
|
|
|
1809 |
w = pwidth->xy.y, v = pwidth->xy.x;
|
|
|
1810 |
else
|
|
|
1811 |
w = pwidth->xy.x, v = pwidth->xy.y;
|
|
|
1812 |
if (v != 0)
|
|
|
1813 |
return 1;
|
|
|
1814 |
pwidth->w = w;
|
|
|
1815 |
pwidth->v.x = pinfo->v.x * scale;
|
|
|
1816 |
pwidth->v.y = pinfo->v.y * scale;
|
|
|
1817 |
return 0;
|
|
|
1818 |
}
|
|
|
1819 |
|
|
|
1820 |
private int
|
|
|
1821 |
get_missing_width(gs_font_base *cfont, int wmode, double scale_c,
|
|
|
1822 |
pdf_glyph_widths_t *pwidths)
|
|
|
1823 |
{
|
|
|
1824 |
gs_font_info_t finfo;
|
|
|
1825 |
int code;
|
|
|
1826 |
|
|
|
1827 |
code = cfont->procs.font_info((gs_font *)cfont, NULL,
|
|
|
1828 |
FONT_INFO_MISSING_WIDTH, &finfo);
|
|
|
1829 |
if (code < 0)
|
|
|
1830 |
return code;
|
|
|
1831 |
if (wmode) {
|
|
|
1832 |
pwidths->Width.xy.x = pwidths->real_width.xy.x = 0;
|
|
|
1833 |
pwidths->Width.xy.y = pwidths->real_width.xy.y =
|
|
|
1834 |
- finfo.MissingWidth * scale_c;
|
|
|
1835 |
pwidths->Width.w = pwidths->real_width.w =
|
|
|
1836 |
pwidths->Width.xy.y;
|
|
|
1837 |
pwidths->Width.v.x = - pwidths->Width.xy.y / 2;
|
|
|
1838 |
pwidths->Width.v.y = - pwidths->Width.xy.y;
|
|
|
1839 |
} else {
|
|
|
1840 |
pwidths->Width.xy.x = pwidths->real_width.xy.x =
|
|
|
1841 |
finfo.MissingWidth * scale_c;
|
|
|
1842 |
pwidths->Width.w = pwidths->real_width.w =
|
|
|
1843 |
pwidths->Width.xy.x;
|
|
|
1844 |
pwidths->Width.xy.y = pwidths->real_width.xy.y = 0;
|
|
|
1845 |
pwidths->Width.v.x = pwidths->Width.v.y = 0;
|
|
|
1846 |
}
|
|
|
1847 |
/*
|
|
|
1848 |
* Don't mark the width as known, just in case this is an
|
|
|
1849 |
* incrementally defined font.
|
|
|
1850 |
*/
|
|
|
1851 |
return 1;
|
|
|
1852 |
}
|
|
|
1853 |
|
|
|
1854 |
|
|
|
1855 |
/*
|
|
|
1856 |
* Get the widths (unmodified from the copied font,
|
|
|
1857 |
* and possibly modified from the original font) of a given glyph.
|
|
|
1858 |
* Return 1 if the width was defaulted to MissingWidth.
|
|
|
1859 |
* Return TEXT_PROCESS_CDEVPROC if a CDevProc callout is needed.
|
|
|
1860 |
* cdevproc_result != NULL if we restart after a CDevProc callout.
|
|
|
1861 |
*/
|
|
|
1862 |
int
|
|
|
1863 |
pdf_glyph_widths(pdf_font_resource_t *pdfont, int wmode, gs_glyph glyph,
|
|
|
1864 |
gs_font *orig_font, pdf_glyph_widths_t *pwidths,
|
|
|
1865 |
const double cdevproc_result[10])
|
|
|
1866 |
{
|
|
|
1867 |
gs_font_base *cfont = pdf_font_resource_font(pdfont, false);
|
|
|
1868 |
gs_font *ofont = orig_font;
|
|
|
1869 |
gs_glyph_info_t info;
|
|
|
1870 |
/*
|
|
|
1871 |
* orig_scale is 1.0 for TrueType, 0.001 or 1.0/2048 for Type 1.
|
|
|
1872 |
*/
|
|
|
1873 |
double sxc, sxo;
|
|
|
1874 |
double scale_c, scale_o;
|
|
|
1875 |
int code, rcode = 0;
|
|
|
1876 |
gs_point v;
|
|
|
1877 |
int allow_cdevproc_callout = (orig_font->FontType == ft_CID_TrueType
|
|
|
1878 |
|| orig_font->FontType == ft_CID_encrypted
|
|
|
1879 |
? GLYPH_INFO_CDEVPROC : 0); /* fixme : allow more font types. */
|
|
|
1880 |
|
|
|
1881 |
if (ofont->FontType == ft_composite)
|
|
|
1882 |
return_error(gs_error_unregistered); /* Must not happen. */
|
|
|
1883 |
code = font_orig_scale((const gs_font *)cfont, &sxc);
|
|
|
1884 |
if (code < 0)
|
|
|
1885 |
return code;
|
|
|
1886 |
code = font_orig_scale(ofont, &sxo);
|
|
|
1887 |
if (code < 0)
|
|
|
1888 |
return code;
|
|
|
1889 |
scale_c = sxc * 1000.0;
|
|
|
1890 |
scale_o = sxo * 1000.0;
|
|
|
1891 |
pwidths->Width.v.x = pwidths->Width.v.y = 0;
|
|
|
1892 |
pwidths->real_width.v.x = pwidths->real_width.v.y = 0;
|
|
|
1893 |
pwidths->replaced_v = false;
|
|
|
1894 |
if (glyph == GS_NO_GLYPH)
|
|
|
1895 |
return get_missing_width(cfont, wmode, scale_c, pwidths);
|
|
|
1896 |
code = cfont->procs.glyph_info((gs_font *)cfont, glyph, NULL,
|
|
|
1897 |
GLYPH_INFO_WIDTH0 |
|
|
|
1898 |
(GLYPH_INFO_WIDTH0 << wmode) |
|
|
|
1899 |
GLYPH_INFO_OUTLINE_WIDTHS |
|
|
|
1900 |
(GLYPH_INFO_VVECTOR0 << wmode),
|
|
|
1901 |
&info);
|
|
|
1902 |
/* For CID fonts the PDF spec requires the x-component of v-vector
|
|
|
1903 |
to be equal to half glyph width, and AR5 takes it from W, DW.
|
|
|
1904 |
So make a compatibe data here.
|
|
|
1905 |
*/
|
|
|
1906 |
if (code == gs_error_undefined || !(info.members & (GLYPH_INFO_WIDTH0 << wmode))) {
|
|
|
1907 |
code = get_missing_width(cfont, wmode, scale_c, pwidths);
|
|
|
1908 |
if (code < 0)
|
|
|
1909 |
v.y = 0;
|
|
|
1910 |
else
|
|
|
1911 |
v.y = pwidths->Width.v.y;
|
|
|
1912 |
if (wmode && pdf_is_CID_font(ofont)) {
|
|
|
1913 |
pdf_glyph_widths_t widths1;
|
|
|
1914 |
|
|
|
1915 |
if (get_missing_width(cfont, 0, scale_c, &widths1) < 0)
|
|
|
1916 |
v.x = 0;
|
|
|
1917 |
else
|
|
|
1918 |
v.x = widths1.Width.w / 2;
|
|
|
1919 |
} else
|
|
|
1920 |
v.x = pwidths->Width.v.x;
|
|
|
1921 |
} else if (code < 0)
|
|
|
1922 |
return code;
|
|
|
1923 |
else {
|
|
|
1924 |
code = store_glyph_width(&pwidths->Width, wmode, scale_c, &info);
|
|
|
1925 |
if (code < 0)
|
|
|
1926 |
return code;
|
|
|
1927 |
rcode |= code;
|
|
|
1928 |
if (info.members & (GLYPH_INFO_VVECTOR0 << wmode)) {
|
|
|
1929 |
v.y = info.v.y * scale_c;
|
|
|
1930 |
} else
|
|
|
1931 |
v.y = 0;
|
|
|
1932 |
if (wmode && pdf_is_CID_font(ofont)) {
|
|
|
1933 |
if (info.members & (GLYPH_INFO_WIDTH0 << wmode)) {
|
|
|
1934 |
v.x = info.width[0].x * scale_c / 2;
|
|
|
1935 |
} else {
|
|
|
1936 |
pdf_glyph_widths_t widths1;
|
|
|
1937 |
|
|
|
1938 |
if (get_missing_width(cfont, 0, scale_c, &widths1) < 0)
|
|
|
1939 |
v.x = 0;
|
|
|
1940 |
else
|
|
|
1941 |
v.x = widths1.Width.w / 2;
|
|
|
1942 |
}
|
|
|
1943 |
} else {
|
|
|
1944 |
if (info.members & (GLYPH_INFO_VVECTOR0 << wmode)) {
|
|
|
1945 |
v.x = info.v.x * scale_c;
|
|
|
1946 |
} else
|
|
|
1947 |
v.x = 0;
|
|
|
1948 |
}
|
|
|
1949 |
}
|
|
|
1950 |
pwidths->Width.v = v;
|
|
|
1951 |
#if 0
|
|
|
1952 |
if (code > 0)
|
|
|
1953 |
pwidths->Width.xy.x = pwidths->Width.xy.y = pwidths->Width.w = 0;
|
|
|
1954 |
#else /* Skip only if not paralel to the axis. */
|
|
|
1955 |
if (code > 0 && !pdf_is_CID_font(ofont))
|
|
|
1956 |
pwidths->Width.xy.x = pwidths->Width.xy.y = pwidths->Width.w = 0;
|
|
|
1957 |
#endif
|
|
|
1958 |
if (cdevproc_result == NULL) {
|
|
|
1959 |
code = ofont->procs.glyph_info(ofont, glyph, NULL,
|
|
|
1960 |
(GLYPH_INFO_WIDTH0 << wmode) |
|
|
|
1961 |
(GLYPH_INFO_VVECTOR0 << wmode) |
|
|
|
1962 |
allow_cdevproc_callout,
|
|
|
1963 |
&info);
|
|
|
1964 |
/* fixme : Move this call before cfont->procs.glyph_info. */
|
|
|
1965 |
if (info.members & GLYPH_INFO_CDEVPROC) {
|
|
|
1966 |
if (allow_cdevproc_callout)
|
|
|
1967 |
return TEXT_PROCESS_CDEVPROC;
|
|
|
1968 |
else
|
|
|
1969 |
return_error(gs_error_rangecheck);
|
|
|
1970 |
}
|
|
|
1971 |
} else {
|
|
|
1972 |
info.width[0].x = cdevproc_result[0];
|
|
|
1973 |
info.width[0].y = cdevproc_result[1];
|
|
|
1974 |
info.width[1].x = cdevproc_result[6];
|
|
|
1975 |
info.width[1].y = cdevproc_result[7];
|
|
|
1976 |
info.v.x = (wmode ? cdevproc_result[8] : 0);
|
|
|
1977 |
info.v.y = (wmode ? cdevproc_result[9] : 0);
|
|
|
1978 |
info.members = (GLYPH_INFO_WIDTH0 << wmode) |
|
|
|
1979 |
(wmode ? GLYPH_INFO_VVECTOR1 : 0);
|
|
|
1980 |
code = 0;
|
|
|
1981 |
}
|
|
|
1982 |
if (code == gs_error_undefined || !(info.members & (GLYPH_INFO_WIDTH0 << wmode)))
|
|
|
1983 |
pwidths->real_width = pwidths->Width;
|
|
|
1984 |
else if (code < 0)
|
|
|
1985 |
return code;
|
|
|
1986 |
else {
|
|
|
1987 |
if ((info.members & (GLYPH_INFO_VVECTOR0 | GLYPH_INFO_VVECTOR1)) != 0)
|
|
|
1988 |
pwidths->replaced_v = true;
|
|
|
1989 |
else
|
|
|
1990 |
info.v.x = info.v.y = 0;
|
|
|
1991 |
code = store_glyph_width(&pwidths->real_width, wmode, scale_o, &info);
|
|
|
1992 |
if (code < 0)
|
|
|
1993 |
return code;
|
|
|
1994 |
rcode |= code;
|
|
|
1995 |
pwidths->real_width.v.x = info.v.x * scale_o;
|
|
|
1996 |
pwidths->real_width.v.y = info.v.y * scale_o;
|
|
|
1997 |
}
|
|
|
1998 |
return rcode;
|
|
|
1999 |
}
|
|
|
2000 |
/* ---------------- Main entry ---------------- */
|
|
|
2001 |
|
|
|
2002 |
/*
|
|
|
2003 |
* Fall back to the default text processing code when needed.
|
|
|
2004 |
*/
|
|
|
2005 |
int
|
|
|
2006 |
pdf_default_text_begin(gs_text_enum_t *pte, const gs_text_params_t *text,
|
|
|
2007 |
gs_text_enum_t **ppte)
|
|
|
2008 |
{
|
|
|
2009 |
gs_text_params_t text1 = *text;
|
|
|
2010 |
|
|
|
2011 |
if(pte->current_font->FontType == 3 && (text1.operation & TEXT_DO_NONE)) {
|
|
|
2012 |
/* We need a real drawing to accumulate charproc. */
|
|
|
2013 |
text1.operation &= ~TEXT_DO_NONE;
|
|
|
2014 |
text1.operation |= TEXT_DO_DRAW;
|
|
|
2015 |
}
|
|
|
2016 |
return gx_default_text_begin(pte->dev, pte->pis, &text1, pte->current_font,
|
|
|
2017 |
pte->path, pte->pdcolor, pte->pcpath,
|
|
|
2018 |
pte->memory, ppte);
|
|
|
2019 |
}
|
|
|
2020 |
|
|
|
2021 |
/*
|
|
|
2022 |
* Continue processing text. This is the 'process' procedure in the text
|
|
|
2023 |
* enumerator. Per the check in pdf_text_begin, we know the operation is
|
|
|
2024 |
* not a charpath, but it could be anything else.
|
|
|
2025 |
*/
|
|
|
2026 |
int
|
|
|
2027 |
pdf_text_process(gs_text_enum_t *pte)
|
|
|
2028 |
{
|
|
|
2029 |
pdf_text_enum_t *const penum = (pdf_text_enum_t *)pte;
|
|
|
2030 |
uint operation = pte->text.operation;
|
|
|
2031 |
uint size = pte->text.size - pte->index;
|
|
|
2032 |
gs_text_enum_t *pte_default;
|
|
|
2033 |
PROCESS_TEXT_PROC((*process));
|
|
|
2034 |
int code;
|
|
|
2035 |
gx_device_pdf *pdev = (gx_device_pdf *)penum->dev;
|
|
|
2036 |
#define BUF_SIZE 100 /* arbitrary > 0 */
|
|
|
2037 |
/* Use a union to ensure alignment. */
|
|
|
2038 |
union bu_ {
|
|
|
2039 |
byte bytes[BUF_SIZE];
|
|
|
2040 |
gs_char chars[BUF_SIZE / sizeof(gs_char)];
|
|
|
2041 |
gs_glyph glyphs[BUF_SIZE / sizeof(gs_glyph)];
|
|
|
2042 |
} buf;
|
|
|
2043 |
|
|
|
2044 |
if (!penum->pte_default && !penum->charproc_accum) {
|
|
|
2045 |
/* Don't need to sync before exiting charproc. */
|
|
|
2046 |
code = pdf_prepare_text_drawing(pdev, pte);
|
|
|
2047 |
if (code == gs_error_rangecheck) {
|
|
|
2048 |
/* Fallback to the default implermentation for handling
|
|
|
2049 |
a transparency with CompatibilityLevel<=1.3 . */
|
|
|
2050 |
goto default_impl;
|
|
|
2051 |
}
|
|
|
2052 |
if (penum->outer_CID != GS_NO_GLYPH) {
|
|
|
2053 |
/* Fallback to the default implermentation for handling
|
|
|
2054 |
Type 3 fonts with CIDs, because currently Type 3
|
|
|
2055 |
font resource arrays' sizes are hardcoded to 256 glyphs.
|
|
|
2056 |
A better solution would be to re-encode the CID text with
|
|
|
2057 |
Type 3 glyph variations. */
|
|
|
2058 |
goto default_impl;
|
|
|
2059 |
}
|
|
|
2060 |
if (code < 0)
|
|
|
2061 |
return code;
|
|
|
2062 |
}
|
|
|
2063 |
if (!penum->pte_default) {
|
|
|
2064 |
pdev->charproc_just_accumulated = false;
|
|
|
2065 |
if (penum->cdevproc_callout) {
|
|
|
2066 |
/* Restore after TEXT_PROCESS_CDEVPROC in scan_cmap_text. */
|
|
|
2067 |
penum->current_font = penum->orig_font;
|
|
|
2068 |
}
|
|
|
2069 |
}
|
|
|
2070 |
code = -1; /* to force default implementation */
|
|
|
2071 |
|
|
|
2072 |
/*
|
|
|
2073 |
* If we fell back to the default implementation, continue using it.
|
|
|
2074 |
*/
|
|
|
2075 |
top:
|
|
|
2076 |
pte_default = penum->pte_default;
|
|
|
2077 |
if (pte_default) {
|
|
|
2078 |
if (penum->charproc_accum) {
|
|
|
2079 |
code = pdf_end_charproc_accum(pdev, penum->current_font, penum->cgp);
|
|
|
2080 |
if (code < 0)
|
|
|
2081 |
return code;
|
|
|
2082 |
penum->charproc_accum = false;
|
|
|
2083 |
code = gx_default_text_restore_state(pte_default);
|
|
|
2084 |
if (code < 0)
|
|
|
2085 |
return code;
|
|
|
2086 |
gs_text_release(pte_default, "pdf_text_process");
|
|
|
2087 |
penum->pte_default = 0;
|
|
|
2088 |
goto top;
|
|
|
2089 |
}
|
|
|
2090 |
pdev->pte = pte_default; /* CAUTION: See comment in gdevpdfx.h . */
|
|
|
2091 |
code = gs_text_process(pte_default);
|
|
|
2092 |
pdev->pte = NULL; /* CAUTION: See comment in gdevpdfx.h . */
|
|
|
2093 |
if (pte->orig_font->FontType != ft_user_defined)
|
|
|
2094 |
gs_text_enum_copy_dynamic(pte, pte_default, true);
|
|
|
2095 |
else {
|
|
|
2096 |
penum->returned.current_char = pte_default->returned.current_char;
|
|
|
2097 |
penum->returned.current_glyph = pte_default->returned.current_glyph;
|
|
|
2098 |
}
|
|
|
2099 |
pdev->charproc_just_accumulated = false;
|
|
|
2100 |
if (code == TEXT_PROCESS_RENDER) {
|
|
|
2101 |
pdev->charproc_ctm = penum->pis->ctm;
|
|
|
2102 |
if (penum->current_font->FontType == ft_user_defined &&
|
|
|
2103 |
penum->orig_font->FontType != ft_composite &&
|
|
|
2104 |
penum->outer_CID == GS_NO_GLYPH &&
|
|
|
2105 |
!(penum->pte_default->text.operation & TEXT_DO_CHARWIDTH)) {
|
|
|
2106 |
/* The condition above must be consistent with one in pdf_text_set_cache,
|
|
|
2107 |
which decides to apply pdf_set_charproc_attrs. */
|
|
|
2108 |
gs_matrix m;
|
|
|
2109 |
|
|
|
2110 |
code = pdf_start_charproc_accum(pdev);
|
|
|
2111 |
if (code < 0)
|
|
|
2112 |
return code;
|
|
|
2113 |
pdf_viewer_state_from_imager_state(pdev, pte->pis, pte->pdcolor);
|
|
|
2114 |
/* Set line params to unallowed values so that
|
|
|
2115 |
they'll synchronize with writing them out on the first use.
|
|
|
2116 |
Doing so because PDF viewer inherits them from the
|
|
|
2117 |
contents stream when executing the charproc,
|
|
|
2118 |
but at this moment we don't know in what contexts
|
|
|
2119 |
it will be used. */
|
|
|
2120 |
pdev->state.line_params.half_width = -1;
|
|
|
2121 |
pdev->state.line_params.cap = gs_cap_unknown;
|
|
|
2122 |
pdev->state.line_params.join = gs_join_unknown;
|
|
|
2123 |
pdev->state.line_params.miter_limit = -1;
|
|
|
2124 |
pdev->state.line_params.dash.pattern_size = -1;
|
|
|
2125 |
/* Must set an identity CTM for the charproc accumulation.
|
|
|
2126 |
The function show_proceed (called from gs_text_process above)
|
|
|
2127 |
executed gsave, so we are safe to change CTM now.
|
|
|
2128 |
Note that BuildChar may change CTM before calling setcachedevice. */
|
|
|
2129 |
gs_make_identity(&m);
|
|
|
2130 |
gs_matrix_fixed_from_matrix(&penum->pis->ctm, &m);
|
|
|
2131 |
return TEXT_PROCESS_RENDER;
|
|
|
2132 |
}
|
|
|
2133 |
}
|
|
|
2134 |
if (code)
|
|
|
2135 |
return code;
|
|
|
2136 |
gs_text_release(pte_default, "pdf_text_process");
|
|
|
2137 |
penum->pte_default = 0;
|
|
|
2138 |
return 0;
|
|
|
2139 |
}
|
|
|
2140 |
{
|
|
|
2141 |
gs_font *font = pte->orig_font; /* Not sure. Changed for CDevProc callout. Was pte->current_font */
|
|
|
2142 |
|
|
|
2143 |
switch (font->FontType) {
|
|
|
2144 |
case ft_CID_encrypted:
|
|
|
2145 |
case ft_CID_TrueType:
|
|
|
2146 |
process = process_cid_text;
|
|
|
2147 |
break;
|
|
|
2148 |
case ft_encrypted:
|
|
|
2149 |
case ft_encrypted2:
|
|
|
2150 |
case ft_TrueType:
|
|
|
2151 |
case ft_user_defined:
|
|
|
2152 |
/* The data may be either glyphs or characters. */
|
|
|
2153 |
process = process_plain_text;
|
|
|
2154 |
break;
|
|
|
2155 |
case ft_composite:
|
|
|
2156 |
process =
|
|
|
2157 |
(((gs_font_type0 *)font)->data.FMapType == fmap_CMap ?
|
|
|
2158 |
process_cmap_text :
|
|
|
2159 |
process_composite_text);
|
|
|
2160 |
break;
|
|
|
2161 |
default:
|
|
|
2162 |
goto skip;
|
|
|
2163 |
}
|
|
|
2164 |
}
|
|
|
2165 |
|
|
|
2166 |
/*
|
|
|
2167 |
* We want to process the entire string in a single call, but we may
|
|
|
2168 |
* need to modify it. Copy it to a buffer. Note that it may consist
|
|
|
2169 |
* of bytes, gs_chars, or gs_glyphs.
|
|
|
2170 |
*/
|
|
|
2171 |
|
|
|
2172 |
if (operation & (TEXT_FROM_STRING | TEXT_FROM_BYTES))
|
|
|
2173 |
DO_NOTHING;
|
|
|
2174 |
else if (operation & TEXT_FROM_CHARS)
|
|
|
2175 |
size *= sizeof(gs_char);
|
|
|
2176 |
else if (operation & TEXT_FROM_SINGLE_CHAR)
|
|
|
2177 |
size = sizeof(gs_char);
|
|
|
2178 |
else if (operation & TEXT_FROM_GLYPHS)
|
|
|
2179 |
size *= sizeof(gs_glyph);
|
|
|
2180 |
else if (operation & TEXT_FROM_SINGLE_GLYPH)
|
|
|
2181 |
size = sizeof(gs_glyph);
|
|
|
2182 |
else
|
|
|
2183 |
goto skip;
|
|
|
2184 |
|
|
|
2185 |
if (size <= sizeof(buf)) {
|
|
|
2186 |
code = process(pte, buf.bytes, size);
|
|
|
2187 |
} else {
|
|
|
2188 |
byte *buf = gs_alloc_string(pte->memory, size, "pdf_text_process");
|
|
|
2189 |
|
|
|
2190 |
if (buf == 0)
|
|
|
2191 |
return_error(gs_error_VMerror);
|
|
|
2192 |
code = process(pte, buf, size);
|
|
|
2193 |
gs_free_string(pte->memory, buf, size, "pdf_text_process");
|
|
|
2194 |
}
|
|
|
2195 |
skip:
|
|
|
2196 |
if (code < 0 ||
|
|
|
2197 |
(pte->current_font->FontType == ft_user_defined &&
|
|
|
2198 |
code != TEXT_PROCESS_INTERVENE &&
|
|
|
2199 |
penum->index < penum->text.size)) {
|
|
|
2200 |
if (code == gs_error_unregistered) /* Debug purpose only. */
|
|
|
2201 |
return code;
|
|
|
2202 |
if (code == gs_error_VMerror)
|
|
|
2203 |
return code;
|
|
|
2204 |
default_impl:
|
|
|
2205 |
/* Fall back to the default implementation. */
|
|
|
2206 |
code = pdf_default_text_begin(pte, &pte->text, &pte_default);
|
|
|
2207 |
if (code < 0)
|
|
|
2208 |
return code;
|
|
|
2209 |
penum->pte_default = pte_default;
|
|
|
2210 |
gs_text_enum_copy_dynamic(pte_default, pte, false);
|
|
|
2211 |
}
|
|
|
2212 |
/* The 'process' procedure might also have set pte_default itself. */
|
|
|
2213 |
if (penum->pte_default && !code)
|
|
|
2214 |
goto top;
|
|
|
2215 |
return code;
|
|
|
2216 |
/*
|
|
|
2217 |
* This function uses an unobvious algorithm while handling type 3 fonts.
|
|
|
2218 |
* It runs 'process' to copy text until a glyph, which was not copied to
|
|
|
2219 |
* output font. Then it installs pte_default and falls back to default
|
|
|
2220 |
* implementation with PS interpreter callout. The callout executes
|
|
|
2221 |
* BuildChar/BuildGlyph with setcachedevice. The latter calls
|
|
|
2222 |
* pdf_set_charproc_attrs, which sets up an accumulator
|
|
|
2223 |
* of graphic objects to a pdf_begin_resource stream.
|
|
|
2224 |
* When the callout completes, pdf_text_process calls pdf_end_charproc_accum
|
|
|
2225 |
* and later resumes the normal (non-default) text enumeration, repeating the
|
|
|
2226 |
* the "callouted" glyph AT SECOND TIME. We can't do without the second pass
|
|
|
2227 |
* becauase in the first pass the glyph widths is unknown.
|
|
|
2228 |
*/
|
|
|
2229 |
/*
|
|
|
2230 |
* Another unobvious thing is a CDevProc callout.
|
|
|
2231 |
* If 'process' returns with TEXT_PROCESS_CDEVPROC,
|
|
|
2232 |
* an interpreter callout will happen, and the function will be called again
|
|
|
2233 |
* with pte->cdevproc_result_valid = true. Then it restatrs with taking
|
|
|
2234 |
* glyph metrics from pte->cdevproc_result instead obtaining them with
|
|
|
2235 |
* font->procs.glyph_info .
|
|
|
2236 |
*/
|
|
|
2237 |
}
|