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|
/* This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
Copyright (C) 2007-2014 by Jin-Hwan Cho and Shunsaku Hirata,
the dvipdfmx project team.
Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
/*
* Concatinating content streams are only supported for streams that only uses
* single FlateDecode filter, i.e.,
*
* /Filter /FlateDecode or /Filter [/FlateDecode]
*
* TrimBox, BleedBox, ArtBox, Rotate ...
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "system.h"
#include "mem.h"
#include "mfileio.h"
#include "error.h"
#include "dvipdfmx.h"
#include "pdfobj.h"
#include "pdfdev.h"
#include "pdfdoc.h"
#include "pdfdraw.h"
#include "pdfparse.h"
#include "pdfximage.h"
#include "epdf.h"
static int rect_equal (pdf_obj *rect1, pdf_obj *rect2);
#if 0
#if HAVE_ZLIB
#include <zlib.h>
static int add_stream_flate (pdf_obj *dst, const void *data, long len);
#endif
static int concat_stream (pdf_obj *dst, pdf_obj *src);
#endif
/*
* From PDFReference15_v6.pdf (p.119 and p.834)
*
* MediaBox rectangle (Required; inheritable)
*
* The media box defines the boundaries of the physical medium on which the
* page is to be printed. It may include any extended area surrounding the
* finished page for bleed, printing marks, or other such purposes. It may
* also include areas close to the edges of the medium that cannot be marked
* because of physical limitations of the output device. Content falling
* outside this boundary can safely be discarded without affecting the
* meaning of the PDF file.
*
* CropBox rectangle (Optional; inheritable)
*
* The crop box defines the region to which the contents of the page are to be
* clipped (cropped) when displayed or printed. Unlike the other boxes, the
* crop box has no defined meaning in terms of physical page geometry or
* intended use; it merely imposes clipping on the page contents. However,
* in the absence of additional information (such as imposition instructions
* specified in a JDF or PJTF job ticket), the crop box will determine how
* the page’s contents are to be positioned on the output medium. The default
* value is the page’s media box.
*
* BleedBox rectangle (Optional; PDF 1.3)
*
* The bleed box (PDF 1.3) defines the region to which the contents of the
* page should be clipped when output in a production environment. This may
* include any extra “bleed area†needed to accommodate the physical
* limitations of cutting, folding, and trimming equipment. The actual printed
* page may include printing marks that fall outside the bleed box.
* The default value is the page’s crop box.
*
* TrimBox rectangle (Optional; PDF 1.3)
*
* The trim box (PDF 1.3) defines the intended dimensions of the finished page
* after trimming. It may be smaller than the media box, to allow for
* production-related content such as printing instructions, cut marks, or
* color bars. The default value is the page’s crop box.
*
* ArtBox rectangle (Optional; PDF 1.3)
*
* The art box (PDF 1.3) defines the extent of the page’s meaningful content
* (including potential white space) as intended by the page’s creator.
* The default value is the page’s crop box.
*
* Rotate integer (Optional; inheritable)
*
* The number of degrees by which the page should be rotated clockwise when
* displayed or printed. The value must be a multiple of 90. Default value: 0.
*/
static int
rect_equal (pdf_obj *rect1, pdf_obj *rect2)
{
int i;
if (!rect1 || !rect2)
return 0;
for (i = 0; i < 4; i++) {
if (pdf_number_value(pdf_get_array(rect1, i)) !=
pdf_number_value(pdf_get_array(rect2, i)))
return 0;
}
return 1;
}
static pdf_obj*
pdf_get_page_obj (pdf_file *pf, long page_no,
pdf_obj **ret_bbox, pdf_obj **ret_resources)
{
pdf_obj *page_tree;
pdf_obj *bbox = NULL, *resources = NULL, *rotate = NULL;
long page_idx;
/*
* Get Page Tree.
*/
page_tree = NULL;
{
pdf_obj *trailer, *catalog;
pdf_obj *markinfo, *tmp;
trailer = pdf_file_get_trailer(pf);
if (pdf_lookup_dict(trailer, "Encrypt")) {
WARN("This PDF document is encrypted.");
pdf_release_obj(trailer);
return NULL;
}
catalog = pdf_deref_obj(pdf_lookup_dict(trailer, "Root"));
if (!PDF_OBJ_DICTTYPE(catalog)) {
WARN("Can't read document catalog.");
pdf_release_obj(trailer);
if (catalog)
pdf_release_obj(catalog);
return NULL;
}
pdf_release_obj(trailer);
markinfo = pdf_deref_obj(pdf_lookup_dict(catalog, "MarkInfo"));
if (markinfo) {
tmp = pdf_lookup_dict(markinfo, "Marked");
if (PDF_OBJ_BOOLEANTYPE(tmp) && pdf_boolean_value(tmp))
WARN("File contains tagged PDF. Ignoring tags.");
pdf_release_obj(markinfo);
}
page_tree = pdf_deref_obj(pdf_lookup_dict(catalog, "Pages"));
pdf_release_obj(catalog);
}
if (!page_tree) {
WARN("Page tree not found.");
return NULL;
}
/*
* Negative page numbers are counted from the back.
*/
{
long count = pdf_number_value(pdf_lookup_dict(page_tree, "Count"));
page_idx = page_no + (page_no >= 0 ? -1 : count);
if (page_idx < 0 || page_idx >= count) {
WARN("Page %ld does not exist.", page_no);
pdf_release_obj(page_tree);
return NULL;
}
page_no = page_idx+1;
}
/*
* Seek correct page. Get Media/Crop Box.
* Media box and resources can be inherited.
*/
{
pdf_obj *kids_ref, *kids;
pdf_obj *crop_box = NULL;
pdf_obj *tmp;
tmp = pdf_lookup_dict(page_tree, "Resources");
resources = tmp ? pdf_deref_obj(tmp) : pdf_new_dict();
while (1) {
long kids_length, i;
if ((tmp = pdf_deref_obj(pdf_lookup_dict(page_tree, "MediaBox")))) {
if (bbox)
pdf_release_obj(bbox);
bbox = tmp;
}
if ((tmp = pdf_deref_obj(pdf_lookup_dict(page_tree, "BleedBox")))) {
if (!rect_equal(tmp, bbox)) {
if (bbox)
pdf_release_obj(bbox);
bbox = tmp;
} else
pdf_release_obj(tmp);
}
if ((tmp = pdf_deref_obj(pdf_lookup_dict(page_tree, "TrimBox")))) {
if (!rect_equal(tmp, bbox)) {
if (bbox)
pdf_release_obj(bbox);
bbox = tmp;
} else
pdf_release_obj(tmp);
}
if ((tmp = pdf_deref_obj(pdf_lookup_dict(page_tree, "ArtBox")))) {
if (!rect_equal(tmp, bbox)) {
if (bbox)
pdf_release_obj(bbox);
bbox = tmp;
} else
pdf_release_obj(tmp);
}
if ((tmp = pdf_deref_obj(pdf_lookup_dict(page_tree, "CropBox")))) {
if (crop_box)
pdf_release_obj(crop_box);
crop_box = tmp;
}
if ((tmp = pdf_deref_obj(pdf_lookup_dict(page_tree, "Rotate")))) {
if (rotate)
pdf_release_obj(rotate);
rotate = tmp;
}
if ((tmp = pdf_deref_obj(pdf_lookup_dict(page_tree, "Resources")))) {
#if 0
pdf_merge_dict(tmp, resources);
#endif
if (resources)
pdf_release_obj(resources);
resources = tmp;
}
kids_ref = pdf_lookup_dict(page_tree, "Kids");
if (!kids_ref)
break;
kids = pdf_deref_obj(kids_ref);
kids_length = pdf_array_length(kids);
for (i = 0; i < kids_length; i++) {
long count;
pdf_release_obj(page_tree);
page_tree = pdf_deref_obj(pdf_get_array(kids, i));
tmp = pdf_deref_obj(pdf_lookup_dict(page_tree, "Count"));
if (tmp) {
/* Pages object */
count = pdf_number_value(tmp);
pdf_release_obj(tmp);
} else
/* Page object */
count = 1;
if (page_idx < count)
break;
page_idx -= count;
}
pdf_release_obj(kids);
if (i == kids_length) {
WARN("Page %ld not found! Broken PDF file?", page_no);
if (bbox)
pdf_release_obj(bbox);
if (crop_box)
pdf_release_obj(crop_box);
if (rotate)
pdf_release_obj(rotate);
pdf_release_obj(resources);
pdf_release_obj(page_tree);
return NULL;
}
}
if (crop_box) {
pdf_release_obj(bbox);
bbox = crop_box;
}
}
if (!bbox) {
WARN("No BoundingBox information available.");
pdf_release_obj(page_tree);
pdf_release_obj(resources);
if (rotate)
pdf_release_obj(rotate);
return NULL;
}
if (rotate) {
if (pdf_number_value(rotate) != 0.0)
WARN("<< /Rotate %d >> found. (Not supported yet)", (int)pdf_number_value(rotate));
pdf_release_obj(rotate);
rotate = NULL;
}
if (ret_bbox != NULL)
*ret_bbox = bbox;
if (ret_resources != NULL)
*ret_resources = resources;
return page_tree;
}
static pdf_obj*
pdf_get_page_content (pdf_obj* page)
{
pdf_obj *contents, *content_new;
contents = pdf_deref_obj(pdf_lookup_dict(page, "Contents"));
if (!contents)
return NULL;
if (pdf_obj_typeof(contents) == PDF_NULL) {
/* empty page */
pdf_release_obj(contents);
/* TODO: better don't include anything if the page is empty */
contents = pdf_new_stream(0);
} else if (PDF_OBJ_ARRAYTYPE(contents)) {
/*
* Concatenate all content streams.
*/
pdf_obj *content_seg;
int idx = 0;
content_new = pdf_new_stream(STREAM_COMPRESS);
for (;;) {
content_seg = pdf_deref_obj(pdf_get_array(contents, idx));
if (!content_seg)
break;
else if (PDF_OBJ_NULLTYPE(content_seg)) {
/* Silently ignore. */
} else if (!PDF_OBJ_STREAMTYPE(content_seg)) {
WARN("Page content not a stream object. Broken PDF file?");
pdf_release_obj(content_seg);
pdf_release_obj(content_new);
pdf_release_obj(contents);
return NULL;
} else if (pdf_concat_stream(content_new, content_seg) < 0) {
WARN("Could not handle content stream with multiple segments.");
pdf_release_obj(content_seg);
pdf_release_obj(content_new);
pdf_release_obj(contents);
return NULL;
}
pdf_release_obj(content_seg);
idx++;
}
pdf_release_obj(contents);
contents = content_new;
} else {
if (!PDF_OBJ_STREAMTYPE(contents)) {
WARN("Page content not a stream object. Broken PDF file?");
pdf_release_obj(contents);
return NULL;
}
/* Flate the contents if necessary. */
content_new = pdf_new_stream(STREAM_COMPRESS);
if (pdf_concat_stream(content_new, contents) < 0) {
WARN("Could not handle a content stream.");
pdf_release_obj(contents);
pdf_release_obj(content_new);
return NULL;
}
pdf_release_obj(contents);
contents = content_new;
}
return contents;
}
int
pdf_include_page (pdf_ximage *ximage, FILE *image_file, const char *filename)
{
pdf_file *pf;
xform_info info;
pdf_obj *contents = NULL, *catalog;
pdf_obj *page = NULL, *resources = NULL, *markinfo = NULL;
long page_no;
pf = pdf_open(filename, image_file);
if (!pf)
return -1;
/*
* Try to embed the PDF, even if the PDF version is newer than the setting.
*/
#if 0
if (pdf_file_get_version(pf) > pdf_get_version())
goto too_recent;
#endif
pdf_ximage_init_form_info(&info);
/*
* Get Page.
*/
page_no = pdf_ximage_get_page(ximage);
if (page_no == 0)
page_no = 1;
page = pdf_doc_get_page(pf, page_no, NULL, &info.bbox, &resources);
if(!page)
goto error_silent;
catalog = pdf_file_get_catalog(pf);
markinfo = pdf_deref_obj(pdf_lookup_dict(catalog, "MarkInfo"));
if (markinfo) {
pdf_obj *tmp = pdf_deref_obj(pdf_lookup_dict(markinfo, "Marked"));
pdf_release_obj(markinfo);
if (!PDF_OBJ_BOOLEANTYPE(tmp)) {
if (tmp)
pdf_release_obj(tmp);
goto error;
} else if (pdf_boolean_value(tmp))
WARN("File contains tagged PDF. Ignoring tags.");
pdf_release_obj(tmp);
}
contents = pdf_deref_obj(pdf_lookup_dict(page, "Contents"));
pdf_release_obj(page);
page = NULL;
/*
* Handle page content stream.
*/
{
pdf_obj *content_new;
if (!contents) {
/*
* Empty page
*/
content_new = pdf_new_stream(0);
/* TODO: better don't include anything if the page is empty */
} else if (PDF_OBJ_STREAMTYPE(contents)) {
/*
* We must import the stream because its dictionary
* may contain indirect references.
*/
content_new = pdf_import_object(contents);
} else if (PDF_OBJ_ARRAYTYPE(contents)) {
/*
* Concatenate all content streams.
*/
int idx, len = pdf_array_length(contents);
content_new = pdf_new_stream(STREAM_COMPRESS);
for (idx = 0; idx < len; idx++) {
pdf_obj *content_seg = pdf_deref_obj(pdf_get_array(contents, idx));
if (!PDF_OBJ_STREAMTYPE(content_seg) ||
pdf_concat_stream(content_new, content_seg) < 0) {
pdf_release_obj(content_seg);
pdf_release_obj(content_new);
goto error;
}
pdf_release_obj(content_seg);
}
} else
goto error;
if (contents)
pdf_release_obj(contents);
contents = content_new;
}
/*
* Add entries to contents stream dictionary.
*/
{
pdf_obj *contents_dict, *bbox, *matrix;
contents_dict = pdf_stream_dict(contents);
pdf_add_dict(contents_dict,
pdf_new_name("Type"),
pdf_new_name("XObject"));
pdf_add_dict(contents_dict,
pdf_new_name("Subtype"),
pdf_new_name("Form"));
pdf_add_dict(contents_dict,
pdf_new_name("FormType"),
pdf_new_number(1.0));
bbox = pdf_new_array();
pdf_add_array(bbox, pdf_new_number(info.bbox.llx));
pdf_add_array(bbox, pdf_new_number(info.bbox.lly));
pdf_add_array(bbox, pdf_new_number(info.bbox.urx));
pdf_add_array(bbox, pdf_new_number(info.bbox.ury));
pdf_add_dict(contents_dict, pdf_new_name("BBox"), bbox);
matrix = pdf_new_array();
pdf_add_array(matrix, pdf_new_number(1.0));
pdf_add_array(matrix, pdf_new_number(0.0));
pdf_add_array(matrix, pdf_new_number(0.0));
pdf_add_array(matrix, pdf_new_number(1.0));
pdf_add_array(matrix, pdf_new_number(0.0));
pdf_add_array(matrix, pdf_new_number(0.0));
pdf_add_dict(contents_dict, pdf_new_name("Matrix"), matrix);
pdf_add_dict(contents_dict, pdf_new_name("Resources"),
pdf_import_object(resources));
pdf_release_obj(resources);
}
pdf_close(pf);
pdf_ximage_set_form(ximage, &info, contents);
return 0;
error:
WARN("Cannot parse document. Broken PDF file?");
error_silent:
if (resources)
pdf_release_obj(resources);
if (markinfo)
pdf_release_obj(markinfo);
if (page)
pdf_release_obj(page);
if (contents)
pdf_release_obj(contents);
pdf_close(pf);
return -1;
too_recent:
pdf_close(pf);
WARN("PDF version of input file more recent than in output file.");
if (compat_mode) {
WARN("Converting. Use \"-V\" switch to change output PDF version.");
return 1;
} else {
WARN("Use \"-V\" switch to change output PDF version.");
return -1;
}
}
typedef enum {
OP_SETCOLOR = 1,
OP_CLOSEandCLIP = 2,
OP_CLIP = 3,
OP_CONCATMATRIX = 4,
OP_SETCOLORSPACE = 5,
OP_RECTANGLE = 6,
OP_CURVETO = 7,
OP_CLOSEPATH = 8,
OP_LINETO = 9,
OP_MOVETO = 10,
OP_NOOP = 11,
OP_GSAVE = 12,
OP_GRESTORE = 13,
OP_CURVETO1 = 14,
OP_CURVETO2 = 15,
OP_UNKNOWN = 16
} pdf_opcode;
static struct operator
{
const char *token;
int opcode;
} pdf_operators[] = {
{"SCN", OP_SETCOLOR},
{"b*", OP_CLOSEandCLIP},
{"B*", OP_CLIP},
{"cm", OP_CONCATMATRIX},
{"CS", OP_SETCOLORSPACE},
{"f*", 0},
{"gs", -1},
{"re", OP_RECTANGLE},
{"rg", -3},
{"RG", -3},
{"sc", OP_SETCOLOR},
{"SC", OP_SETCOLOR},
{"W*", OP_CLIP},
{"b", OP_CLOSEandCLIP},
{"B", OP_CLIP},
{"c", OP_CURVETO},
{"d", -2},
{"f", 0},
{"F", 0},
{"g", -1},
{"G", -1},
{"h", OP_CLOSEPATH},
{"i", -1},
{"j", -1},
{"J", -1},
{"k", -4},
{"K", -4},
{"l", OP_LINETO},
{"m", OP_MOVETO},
{"M", -1},
{"n", OP_NOOP},
{"q", OP_GSAVE},
{"Q", OP_GRESTORE},
{"s", OP_CLOSEandCLIP},
{"S", OP_CLIP},
{"v", OP_CURVETO1},
{"w", -1},
{"W", OP_CLIP},
{"y", OP_CURVETO2}
};
int
pdf_copy_clip (FILE *image_file, int pageNo, double x_user, double y_user)
{
pdf_obj *page_tree, *contents;
int depth = 0, top = -1;
const char *clip_path, *end_path;
char *save_path, *temp;
pdf_tmatrix M;
double stack[6];
pdf_file *pf;
pf = pdf_open(NULL, image_file);
if (!pf)
return -1;
pdf_dev_currentmatrix(&M);
pdf_invertmatrix(&M);
M.e += x_user; M.f += y_user;
page_tree = pdf_get_page_obj (pf, pageNo, NULL, NULL);
if (!page_tree) {
pdf_close(pf);
return -1;
}
contents = pdf_get_page_content(page_tree);
pdf_release_obj(page_tree);
if (!contents) {
pdf_close(pf);
return -1;
}
pdf_doc_add_page_content(" ", 1);
save_path = malloc(pdf_stream_length(contents) + 1);
strncpy(save_path, (const char *) pdf_stream_dataptr(contents), pdf_stream_length(contents));
clip_path = save_path;
end_path = clip_path + pdf_stream_length(contents);
depth = 0;
for (; clip_path < end_path; clip_path++) {
int color_dimen = 0; /* silence uninitialized warning */
char *token;
skip_white(&clip_path, end_path);
if (clip_path == end_path)
break;
if (depth > 1) {
if (*clip_path == 'q')
depth++;
if (*clip_path == 'Q')
depth--;
parse_ident(&clip_path, end_path);
continue;
} else if (*clip_path == '-'
|| *clip_path == '+'
|| *clip_path == '.'
|| isdigit((unsigned char)*clip_path)) {
stack[++top] = strtod(clip_path, &temp);
clip_path = temp;
} else if (*clip_path == '[') {
/* Ignore, but put a dummy value on the stack (in case of d operator) */
parse_pdf_array(&clip_path, end_path, pf);
stack[++top] = 0;
} else if (*clip_path == '/') {
if (strncmp("/DeviceGray", clip_path, 11) == 0
|| strncmp("/Indexed", clip_path, 8) == 0
|| strncmp("/CalGray", clip_path, 8) == 0) {
color_dimen = 1;
continue;
}
else if (strncmp("/DeviceRGB", clip_path, 10) == 0
|| strncmp("/CalRGB", clip_path, 7) == 0
|| strncmp("/Lab", clip_path, 4) == 0) {
color_dimen = 3;
continue;
}
else if (strncmp("/DeviceCMYK", clip_path, 11) == 0) {
color_dimen = 4;
continue;
}
else {
clip_path++;
parse_ident(&clip_path, end_path);
skip_white(&clip_path, end_path);
token = parse_ident(&clip_path, end_path);
if (strcmp(token, "gs") == 0) {
continue;
}
return -1;
}
} else {
int j;
pdf_tmatrix T;
pdf_coord p0, p1, p2, p3;
token = parse_ident(&clip_path, end_path);
for (j = 0; j < sizeof(pdf_operators) / sizeof(pdf_operators[0]); j++)
if (strcmp(token, pdf_operators[j].token) == 0)
break;
if (j == sizeof(pdf_operators) / sizeof(pdf_operators[0])) {
return -1;
}
switch (pdf_operators[j].opcode) {
case 0:
case -1:
case -2:
case -3:
case -4:
/* Just pop the stack and do nothing. */
top += pdf_operators[j].opcode;
if (top < -1)
return -1;
break;
case OP_SETCOLOR:
top -= color_dimen;
if (top < -1)
return -1;
break;
case OP_CLOSEandCLIP:
pdf_dev_closepath();
case OP_CLIP:
#if 0
pdf_dev_clip();
#else
pdf_dev_flushpath('W', PDF_FILL_RULE_NONZERO);
#endif
break;
case OP_CONCATMATRIX:
if (top < 5)
return -1;
T.f = stack[top--];
T.e = stack[top--];
T.d = stack[top--];
T.c = stack[top--];
T.b = stack[top--];
T.a = stack[top--];
pdf_concatmatrix(&M, &T);
break;
case OP_SETCOLORSPACE:
/* Do nothing. */
break;
case OP_RECTANGLE:
if (top < 3)
return -1;
p1.y = stack[top--];
p1.x = stack[top--];
p0.y = stack[top--];
p0.x = stack[top--];
if (M.b == 0 && M.c == 0) {
pdf_tmatrix M0;
M0.a = M.a; M0.b = M.b; M0.c = M.c; M0.d = M.d;
M0.e = 0; M0.f = 0;
pdf_dev_transform(&p0, &M);
pdf_dev_transform(&p1, &M0);
pdf_dev_rectadd(p0.x, p0.y, p1.x, p1.y);
} else {
p2.x = p0.x + p1.x; p2.y = p0.y + p1.y;
p3.x = p0.x; p3.y = p0.y + p1.y;
p1.x += p0.x; p1.y = p0.y;
pdf_dev_transform(&p0, &M);
pdf_dev_transform(&p1, &M);
pdf_dev_transform(&p2, &M);
pdf_dev_transform(&p3, &M);
pdf_dev_moveto(p0.x, p0.y);
pdf_dev_lineto(p1.x, p1.y);
pdf_dev_lineto(p2.x, p2.y);
pdf_dev_lineto(p3.x, p3.y);
pdf_dev_closepath();
}
break;
case OP_CURVETO:
if (top < 5)
return -1;
p0.y = stack[top--];
p0.x = stack[top--];
pdf_dev_transform(&p0, &M);
p1.y = stack[top--];
p1.x = stack[top--];
pdf_dev_transform(&p1, &M);
p2.y = stack[top--];
p2.x = stack[top--];
pdf_dev_transform(&p2, &M);
pdf_dev_curveto(p2.x, p2.y, p1.x, p1.y, p0.x, p0.y);
break;
case OP_CLOSEPATH:
pdf_dev_closepath();
break;
case OP_LINETO:
if (top < 1)
return -1;
p0.y = stack[top--];
p0.x = stack[top--];
pdf_dev_transform(&p0, &M);
pdf_dev_lineto(p0.x, p0.y);
break;
case OP_MOVETO:
if (top < 1)
return -1;
p0.y = stack[top--];
p0.x = stack[top--];
pdf_dev_transform(&p0, &M);
pdf_dev_moveto(p0.x, p0.y);
break;
case OP_NOOP:
pdf_doc_add_page_content(" n", 2);
break;
case OP_GSAVE:
depth++;
break;
case OP_GRESTORE:
depth--;
break;
case OP_CURVETO1:
if (top < 3)
return -1;
p0.y = stack[top--];
p0.x = stack[top--];
pdf_dev_transform(&p0, &M);
p1.y = stack[top--];
p1.x = stack[top--];
pdf_dev_transform(&p1, &M);
pdf_dev_vcurveto(p1.x, p1.y, p0.x, p0.y);
break;
case OP_CURVETO2:
if (top < 3)
return -1;
p0.y = stack[top--];
p0.x = stack[top--];
pdf_dev_transform(&p0, &M);
p1.y = stack[top--];
p1.x = stack[top--];
pdf_dev_transform(&p1, &M);
pdf_dev_ycurveto(p1.x, p1.y, p0.x, p0.y);
break;
default:
return -1;
}
}
}
free(save_path);
pdf_release_obj(contents);
pdf_close(pf);
return 0;
}
#if 0
#define WBUF_SIZE 4096
#if HAVE_ZLIB
static int
add_stream_flate (pdf_obj *dst, const void *data, long len)
{
z_stream z;
Bytef wbuf[WBUF_SIZE];
z.zalloc = Z_NULL; z.zfree = Z_NULL; z.opaque = Z_NULL;
z.next_in = (z_const Bytef *) data; z.avail_in = len;
z.next_out = (Bytef *) wbuf; z.avail_out = WBUF_SIZE;
if (inflateInit(&z) != Z_OK) {
WARN("inflateInit() failed.");
return -1;
}
for (;;) {
int status;
status = inflate(&z, Z_NO_FLUSH);
if (status == Z_STREAM_END)
break;
else if (status != Z_OK) {
WARN("inflate() failed. Broken PDF file?");
inflateEnd(&z);
return -1;
}
if (z.avail_out == 0) {
pdf_add_stream(dst, wbuf, WBUF_SIZE);
z.next_out = wbuf;
z.avail_out = WBUF_SIZE;
}
}
if (WBUF_SIZE - z.avail_out > 0)
pdf_add_stream(dst, wbuf, WBUF_SIZE - z.avail_out);
return (inflateEnd(&z) == Z_OK ? 0 : -1);
}
#endif
static int
concat_stream (pdf_obj *dst, pdf_obj *src)
{
const char *stream_data;
long stream_length;
pdf_obj *stream_dict;
pdf_obj *filter;
if (!PDF_OBJ_STREAMTYPE(dst) || !PDF_OBJ_STREAMTYPE(src))
ERROR("Invalid type.");
stream_data = pdf_stream_dataptr(src);
stream_length = pdf_stream_length (src);
stream_dict = pdf_stream_dict (src);
if (pdf_lookup_dict(stream_dict, "DecodeParms")) {
WARN("DecodeParams not supported.");
return -1;
}
filter = pdf_lookup_dict(stream_dict, "Filter");
if (!filter) {
pdf_add_stream(dst, stream_data, stream_length);
return 0;
#if HAVE_ZLIB
} else {
char *filter_name;
if (PDF_OBJ_NAMETYPE(filter)) {
filter_name = pdf_name_value(filter);
if (filter_name && !strcmp(filter_name, "FlateDecode"))
return add_stream_flate(dst, stream_data, stream_length);
else {
WARN("DecodeFilter \"%s\" not supported.", filter_name);
return -1;
}
} else if (PDF_OBJ_ARRAYTYPE(filter)) {
if (pdf_array_length(filter) > 1) {
WARN("Multiple DecodeFilter not supported.");
return -1;
} else {
filter_name = pdf_name_value(pdf_get_array(filter, 0));
if (filter_name && !strcmp(filter_name, "FlateDecode"))
return add_stream_flate(dst, stream_data, stream_length);
else {
WARN("DecodeFilter \"%s\" not supported.", filter_name);
return -1;
}
}
} else
ERROR("Broken PDF file?");
#endif /* HAVE_ZLIB */
}
return -1;
}
#endif
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