void write_pdfstream(PDF pdf, image_dict * idict)
{
pdf_begin_obj(pdf, img_objnum(idict), OBJSTM_NEVER);
pdf_begin_dict(pdf);
if (!img_notype(idict)) {
pdf_dict_add_name(pdf, "Type", "XObject");
pdf_dict_add_name(pdf, "Subtype", "Form");
pdf_dict_add_int(pdf, "FormType", 1);
}
if (!img_nobbox(idict)) {
pdf_add_name(pdf, "BBox");
pdf_begin_array(pdf);
pdf_add_real(pdf, sp2bp(img_bbox(idict)[0]));
pdf_add_real(pdf, sp2bp(img_bbox(idict)[1]));
pdf_add_real(pdf, sp2bp(img_bbox(idict)[2]));
pdf_add_real(pdf, sp2bp(img_bbox(idict)[3]));
pdf_end_array(pdf);
}
if (img_attr(idict) != NULL && strlen(img_attr(idict)) > 0) {
pdf_printf(pdf, "\n%s\n", img_attr(idict));
}
if (!img_nolength(idict)) {
pdf_dict_add_streaminfo(pdf);
}
pdf_end_dict(pdf);
pdf_begin_stream(pdf);
if (img_pdfstream_stream(idict) != NULL) {
pdf_out_block(pdf, (const char *) img_pdfstream_stream(idict), img_pdfstream_size(idict));
}
pdf_end_stream(pdf);
pdf_end_obj(pdf);
}
/* Finish the pattern definition. */
PDFLIB_API void PDFLIB_CALL
PDF_end_pattern(PDF *p)
{
static const char fn[] = "PDF_end_pattern";
long length;
PDF_TRACE(("%s\t(pdf[%p]);\n", fn, (void *) p));
if (PDF_SANITY_CHECK_FAILED(p))
return;
PDF_CHECK_SCOPE(p, fn, pdf_state_pattern);
/* check whether PDF_save() and PDF_restore() calls are balanced */
if (p->sl > 0)
pdf_error(p, PDF_RuntimeError,
"Unmatched save level at end of pattern");
pdf_end_text(p);
p->contents = c_none;
if (p->compresslevel)
pdf_compress_end(p);
length = pdf_tell(p) - p->start_contents_pos;
pdf_end_stream(p);
pdf_end_obj(p); /* pattern */
pdf_begin_obj(p, p->contents_length_id); /* Length object */
pdf_printf(p, "%ld\n", length);
pdf_end_obj(p);
pdf_begin_obj(p, p->res_id); /* Resource object */
pdf_begin_dict(p); /* Resource dict */
pdf_write_page_procsets(p); /* ProcSet resources */
pdf_write_page_fonts(p); /* Font resources */
pdf_write_page_colorspaces(p); /* Color space resources */
pdf_write_page_pattern(p); /* Pattern resources */
pdf_write_xobjects(p); /* XObject resources */
pdf_end_dict(p); /* resource dict */
pdf_end_obj(p); /* resource object */
PDF_POP_STATE(p, fn);
if (p->flush & PDF_FLUSH_PAGE)
pdf_flush_stream(p);
}
void
pdf_end_contents_section(PDF *p)
{
long length;
if (p->contents == c_none)
return;
pdf_end_text(p);
p->contents = c_none;
pdf_compress_end(p);
/* Contents object */
length = pdf_tell(p) - p->start_contents_pos;
pdf_end_stream(p);
pdf_end_obj(p);
pdf_begin_obj(p, p->contents_length_id); /* Length object */
pdf_printf(p, "%ld\n", length);
pdf_end_obj(p);
}
static int l_immediateobj(lua_State * L)
{
int n, first_arg = 1;
int k;
lstring buf;
const_lstring st1,st2, st3;
const char *st1_s = NULL;
st1.s = st2.s = st3.s = NULL;
check_o_mode(static_pdf, "immediateobj()", 1 << OMODE_PDF, true);
if (global_shipping_mode != NOT_SHIPPING)
luaL_error(L, "pdf.immediateobj() can not be used with \\latelua");
n = lua_gettop(L);
if ((n > 0) && (lua_type(L, 1) == LUA_TNUMBER)) {
first_arg++;
k = (int) lua_tointeger(L, 1);
check_obj_type(static_pdf, obj_type_obj, k);
if (is_obj_scheduled(static_pdf, k) || obj_data_ptr(static_pdf, k) != 0)
luaL_error(L, "pdf.immediateobj() object in use");
} else {
static_pdf->obj_count++;
k = pdf_create_obj(static_pdf, obj_type_obj, static_pdf->obj_ptr + 1);
}
pdf_last_obj = k;
switch (n - first_arg + 1) {
case 0:
luaL_error(L, "pdf.immediateobj() needs at least one argument");
break;
case 1:
if (!lua_isstring(L, first_arg)) /* or number */
luaL_error(L, "pdf.immediateobj() 1st argument must be string");
pdf_begin_obj(static_pdf, k, OBJSTM_ALWAYS);
st1.s = lua_tolstring(L, first_arg, &st1.l);
pdf_out_block(static_pdf, st1.s, st1.l);
pdf_end_obj(static_pdf);
break;
case 2:
case 3:
if (lua_type(L,first_arg) != LUA_TSTRING)
luaL_error(L, "pdf.immediateobj() 1st argument must be string");
if (!lua_isstring(L, first_arg + 1)) /* or number */
luaL_error(L, "pdf.immediateobj() 2nd argument must be string");
st1_s = lua_tostring(L, first_arg);
st2.s = lua_tolstring(L, first_arg + 1, &st2.l);
if (lua_key_eq(st1_s, file)) {
if (n == first_arg + 2)
luaL_error(L, "pdf.immediateobj() 3rd argument forbidden in file mode");
pdf_begin_obj(static_pdf, k, OBJSTM_ALWAYS);
buf.s = fread_to_buf(L, st2.s, &buf.l);
pdf_out_block(static_pdf, (const char *) buf.s, buf.l);
xfree(buf.s);
pdf_end_obj(static_pdf);
} else {
pdf_begin_obj(static_pdf, k, OBJSTM_NEVER); /* not an object stream candidate! */
pdf_begin_dict(static_pdf);
if (n == first_arg + 2) { /* write attr text */
if (!lua_isstring(L, first_arg + 2)) /* or number (maybe only string as it's an attr) */
luaL_error(L, "pdf.immediateobj() 3rd argument must be string");
st3.s = lua_tolstring(L, first_arg + 2, &st3.l);
pdf_out_block(static_pdf, st3.s, st3.l);
if (st3.s[st3.l - 1] != '\n')
pdf_out(static_pdf, '\n');
}
pdf_dict_add_streaminfo(static_pdf);
pdf_end_dict(static_pdf);
pdf_begin_stream(static_pdf);
if (lua_key_eq(st1_s, stream)) {
pdf_out_block(static_pdf, st2.s, st2.l);
} else if (lua_key_eq(st1_s, streamfile)) {
buf.s = fread_to_buf(L, st2.s, &buf.l);
pdf_out_block(static_pdf, (const char *) buf.s, buf.l);
xfree(buf.s);
} else
luaL_error(L, "pdf.immediateobj() invalid argument");
pdf_end_stream(static_pdf);
pdf_end_obj(static_pdf);
}
break;
default:
luaL_error(L, "pdf.immediateobj() allows max. 3 arguments");
}
lua_pushinteger(L, k);
return 1;
}
static int table_obj(lua_State * L)
{
const char *type;
int k, obj_compression;
int compress_level = -1; /* unset */
int os_threshold = OBJSTM_ALWAYS; /* default: put non-stream objects into object streams */
int saved_compress_level = static_pdf->compress_level;
const_lstring attr, st;
lstring buf;
int immediate = 0; /* default: not immediate */
attr.s = st.s = NULL;
attr.l = 0;
assert(lua_istable(L, 1)); /* t */
lua_key_rawgeti(type);
if (lua_isnil(L, -1)) /* !vs t */
luaL_error(L, "pdf.obj(): object \"type\" missing");
if (lua_type(L,-1) != LUA_TSTRING) /* !vs t */
luaL_error(L, "pdf.obj(): object \"type\" must be string");
type = lua_tostring(L, -1);
if (! (lua_key_eq(type, raw) || lua_key_eq(type, stream))) {
luaL_error(L, "pdf.obj(): \"%s\" is not a valid object type", type); /* i vs t */
}
lua_pop(L, 1); /* t */
lua_key_rawgeti(immediate);
if (!lua_isnil(L, -1)) { /* b? t */
if (!lua_isboolean(L, -1)) /* !b t */
luaL_error(L, "pdf.obj(): \"immediate\" must be boolean");
immediate = lua_toboolean(L, -1); /* 0 or 1 */
}
lua_pop(L, 1); /* t */
/* is a reserved object referenced by "objnum"? */
lua_key_rawgeti(objnum);
if (!lua_isnil(L, -1)) { /* vi? t */
if (lua_type(L,-1) != LUA_TNUMBER) /* !vi t */
luaL_error(L, "pdf.obj(): \"objnum\" must be integer");
k = (int) lua_tointeger(L, -1); /* vi t */
check_obj_type(static_pdf, obj_type_obj, k);
if (is_obj_scheduled(static_pdf, k) || obj_data_ptr(static_pdf, k) != 0)
luaL_error(L, "pdf.obj() object in use");
} else {
static_pdf->obj_count++;
k = pdf_create_obj(static_pdf, obj_type_obj, static_pdf->obj_ptr + 1);
}
pdf_last_obj = k;
if (immediate == 0) {
obj_data_ptr(static_pdf, k) = pdf_get_mem(static_pdf, pdfmem_obj_size);
init_obj_obj(static_pdf, k);
}
lua_pop(L, 1); /* t */
/* get optional "attr" (allowed only for stream case) */
lua_key_rawgeti(attr);
if (!lua_isnil(L, -1)) { /* attr-s? t */
if (! lua_key_eq(type, stream))
luaL_error(L, "pdf.obj(): \"attr\" key not allowed for non-stream object");
if (!lua_isstring(L, -1)) /* or number */ /* !attr-s t */
luaL_error(L, "pdf.obj(): object \"attr\" must be string");
if (immediate == 1) {
attr.s = lua_tolstring(L, -1, &attr.l); /* attr-s t */
lua_pop(L, 1); /* t */
} else
obj_obj_stream_attr(static_pdf, k) = luaL_ref(Luas, LUA_REGISTRYINDEX); /* t */
} else {
lua_pop(L, 1); /* t */
}
/* get optional "compresslevel" (allowed only for stream case) */
lua_key_rawgeti(compresslevel);
if (!lua_isnil(L, -1)) { /* vi? t */
if (lua_key_eq(type, raw))
luaL_error(L, "pdf.obj(): \"compresslevel\" key not allowed for raw object");
if (lua_type(L, -1) != LUA_TNUMBER) /* !vi t */
luaL_error(L, "pdf.obj(): \"compresslevel\" must be integer");
compress_level = (int) lua_tointeger(L, -1); /* vi t */
if (compress_level > 9)
luaL_error(L, "pdf.obj(): \"compresslevel\" must be <= 9");
else if (compress_level < 0)
luaL_error(L, "pdf.obj(): \"compresslevel\" must be >= 0");
if (immediate == 0)
obj_obj_pdfcompresslevel(static_pdf, k) = compress_level;
}
lua_pop(L, 1); /* t */
/* get optional "objcompression" (allowed only for non-stream case) */
lua_key_rawgeti(objcompression);
if (!lua_isnil(L, -1)) { /* b? t */
if (lua_key_eq(type, stream))
luaL_error(L, "pdf.obj(): \"objcompression\" key not allowed for stream object");
if (!lua_isboolean(L, -1)) /* !b t */
luaL_error(L, "pdf.obj(): \"objcompression\" must be boolean");
obj_compression = lua_toboolean(L, -1); /* 0 or 1 */
/* OBJSTM_NEVER: never into object stream; OBJSTM_ALWAYS: depends then on \pdfobjcompresslevel */
if (obj_compression > 0)
os_threshold = OBJSTM_ALWAYS;
else
os_threshold = OBJSTM_NEVER;
if (immediate == 0)
obj_obj_objstm_threshold(static_pdf, k) = os_threshold;
}
lua_pop(L, 1); /* t */
/* now the object contents for all cases are handled */
lua_key_rawgeti(string);
lua_key_rawgeti_n(file,-2);
if (!lua_isnil(L, -1) && !lua_isnil(L, -2)) /* file-s? string-s? t */
luaL_error(L, "pdf.obj(): \"string\" and \"file\" must not be given together");
if (lua_isnil(L, -1) && lua_isnil(L, -2)) /* nil nil t */
luaL_error(L, "pdf.obj(): no \"string\" or \"file\" given");
if (lua_key_eq(type, raw)) {
if (immediate == 1)
pdf_begin_obj(static_pdf, k, os_threshold);
if (!lua_isnil(L, -2)) { /* file-s? string-s? t */
/* from string */
lua_pop(L, 1); /* string-s? t */
if (!lua_isstring(L, -1)) /* or number */ /* !string-s t */
luaL_error(L, "pdf.obj(): \"string\" must be string for raw object");
if (immediate == 1) {
st.s = lua_tolstring(L, -1, &st.l);
pdf_out_block(static_pdf, st.s, st.l);
} else
obj_obj_data(static_pdf, k) = luaL_ref(L, LUA_REGISTRYINDEX); /* t */
} else {
/* from file */
if (lua_type(L, -1) != LUA_TSTRING) /* !file-s nil t */
luaL_error(L, "pdf.obj(): \"file\" name must be string for raw object");
if (immediate == 1) {
st.s = lua_tolstring(L, -1, &st.l); /* file-s nil t */
buf.s = fread_to_buf(L, st.s, &buf.l);
pdf_out_block(static_pdf, (const char *) buf.s, buf.l);
/* already in pdf_end_obj:
if (buf.s[buf.l - 1] != '\n')
pdf_out(static_pdf, '\n');
*/
xfree(buf.s);
} else {
set_obj_obj_is_file(static_pdf, k);
obj_obj_data(static_pdf, k) = luaL_ref(L, LUA_REGISTRYINDEX); /* nil t */
}
}
if (immediate == 1)
pdf_end_obj(static_pdf);
} else {
if (immediate == 1) {
pdf_begin_obj(static_pdf, k, OBJSTM_NEVER); /* 0 = not an object stream candidate! */
pdf_begin_dict(static_pdf);
if (attr.s != NULL) {
pdf_out_block(static_pdf, attr.s, attr.l);
if (attr.s[attr.l - 1] != '\n')
pdf_out(static_pdf, '\n');
}
if (compress_level > -1)
static_pdf->compress_level = compress_level;
pdf_dict_add_streaminfo(static_pdf);
pdf_end_dict(static_pdf);
pdf_begin_stream(static_pdf);
} else {
set_obj_obj_is_stream(static_pdf, k);
if (compress_level > -1)
obj_obj_pdfcompresslevel(static_pdf, k) = compress_level;
}
if (!lua_isnil(L, -2)) { /* file-s? string-s? t */
/* from string */
lua_pop(L, 1); /* string-s? t */
if (!lua_isstring(L, -1)) /* or number */ /* !string-s t */
luaL_error(L, "pdf.obj(): \"string\" must be string for stream object");
if (immediate == 1) {
st.s = lua_tolstring(L, -1, &st.l); /* string-s t */
pdf_out_block(static_pdf, st.s, st.l);
} else
obj_obj_data(static_pdf, k) = luaL_ref(L, LUA_REGISTRYINDEX); /* t */
} else {
/* from file */
if (lua_type(L, -1) != LUA_TSTRING) /* !file-s nil t */
luaL_error(L, "pdf.obj(): \"file\" name must be string for stream object");
if (immediate == 1) {
st.s = lua_tolstring(L, -1, &st.l); /* file-s nil t */
buf.s = fread_to_buf(L, st.s, &buf.l);
pdf_out_block(static_pdf, (const char *) buf.s, buf.l);
xfree(buf.s);
} else {
set_obj_obj_is_file(static_pdf, k);
obj_obj_data(static_pdf, k) = luaL_ref(L, LUA_REGISTRYINDEX); /* nil t */
}
}
if (immediate == 1) {
pdf_end_stream(static_pdf);
pdf_end_obj(static_pdf);
}
}
static_pdf->compress_level = saved_compress_level;
return k;
}
void
pdf_write_page_annots(PDF *p)
{
pdf_annot *ann;
long length, start_pos;
id length_id;
PDF_data_source src;
for (ann = p->annots; ann != NULL; ann = ann->next) {
pdf_begin_obj(p, ann->obj_id); /* Annotation object */
pdf_begin_dict(p); /* Annotation dict */
pdf_puts(p, "/Type/Annot\n");
switch (ann->type) {
case ann_text:
pdf_puts(p, "/Subtype/Text\n");
pdf_printf(p, "/Rect[%f %f %f %f]\n",
ann->rect.llx, ann->rect.lly, ann->rect.urx, ann->rect.ury);
pdf_write_border_style(p, ann);
if (ann->open)
pdf_puts(p, "/Open true\n");
if (ann->icon != icon_text_note) /* note is default */
pdf_printf(p, "/Name/%s\n", pdf_icon_names[ann->icon]);
/* Contents key is required, but may be empty */
pdf_puts(p, "/Contents");
if (ann->contents) {
pdf_quote_string(p, ann->contents);
pdf_putc(p, PDF_NEWLINE);
} else
pdf_puts(p, "()\n"); /* empty contents is OK */
/* title is optional */
if (ann->title) {
pdf_puts(p, "/T");
pdf_quote_string(p, ann->title);
pdf_putc(p, PDF_NEWLINE);
}
break;
case ann_locallink:
pdf_puts(p, "/Subtype/Link\n");
pdf_printf(p, "/Rect[%f %f %f %f]\n",
ann->rect.llx, ann->rect.lly, ann->rect.urx, ann->rect.ury);
pdf_write_border_style(p, ann);
/* preallocate page object id for a later page */
if (ann->dest.page > p->current_page) {
while (ann->dest.page >= p->pages_capacity)
pdf_grow_pages(p);
/* if this page has already been used as a link target
* it will already have an object id.
*/
if (p->pages[ann->dest.page] == BAD_ID)
p->pages[ann->dest.page] = pdf_alloc_id(p);
}
if (ann->dest.type == retain) {
pdf_printf(p, "/Dest[%ld 0 R/XYZ null null 0]\n",
p->pages[ann->dest.page]);
} else if (ann->dest.type == fitpage) {
pdf_printf(p, "/Dest[%ld 0 R/Fit]\n",
p->pages[ann->dest.page]);
} else if (ann->dest.type == fitwidth) {
pdf_printf(p, "/Dest[%ld 0 R/FitH 0]\n",
p->pages[ann->dest.page]);
} else if (ann->dest.type == fitheight) {
pdf_printf(p, "/Dest[%ld 0 R/FitV 0]\n",
p->pages[ann->dest.page]);
} else if (ann->dest.type == fitbbox) {
pdf_printf(p, "/Dest[%ld 0 R/FitB]\n",
p->pages[ann->dest.page]);
}
break;
case ann_pdflink:
pdf_puts(p, "/Subtype/Link\n");
pdf_printf(p, "/Rect[%f %f %f %f]\n",
ann->rect.llx, ann->rect.lly, ann->rect.urx, ann->rect.ury);
pdf_write_border_style(p, ann);
pdf_puts(p, "/A");
pdf_begin_dict(p); /* A dict */
pdf_puts(p, "/Type/Action/S/GoToR\n");
if (ann->dest.type == retain) {
pdf_printf(p, "/D[%d 0 R/XYZ null null 0]\n",
ann->dest.page-1); /* zero-based */
} else if (ann->dest.type == fitpage) {
/* zero-based */
pdf_printf(p, "/D[%d 0 R/Fit]\n", ann->dest.page-1);
} else if (ann->dest.type == fitwidth) {
/* Trick: we don't know the height of a future page yet,
* so we use a "large" value for top which will do for
* most pages. If it doesn't work, not much harm is done.
*/
/* zero-based */
pdf_printf(p, "/D[%d 0 R/FitH 2000]\n", ann->dest.page-1);
} else if (ann->dest.type == fitheight) {
/* zero-based */
pdf_printf(p, "/D[%d 0 R/FitV 0]\n", ann->dest.page-1);
} else if (ann->dest.type == fitbbox) {
/* zero-based */
pdf_printf(p, "/D[%d 0 R/FitB]\n", ann->dest.page-1);
}
pdf_puts(p, "/F");
pdf_begin_dict(p); /* F dict */
pdf_puts(p, "/Type/FileSpec\n");
pdf_printf(p, "/F(");
pdf_puts(p, ann->filename);
pdf_puts(p,")\n");
pdf_end_dict(p); /* F dict */
pdf_end_dict(p); /* A dict */
break;
case ann_launchlink:
pdf_puts(p, "/Subtype/Link\n");
pdf_printf(p, "/Rect[%f %f %f %f]\n",
ann->rect.llx, ann->rect.lly, ann->rect.urx, ann->rect.ury);
pdf_write_border_style(p, ann);
pdf_puts(p, "/A");
pdf_begin_dict(p); /* A dict */
pdf_puts(p, "/Type/Action/S/Launch\n");
pdf_puts(p, "/F");
pdf_begin_dict(p); /* F dict */
pdf_puts(p, "/Type/FileSpec\n");
pdf_printf(p, "/F(");
pdf_puts(p, ann->filename);
pdf_puts(p,")\n");
pdf_end_dict(p); /* F dict */
pdf_end_dict(p); /* A dict */
break;
case ann_weblink:
pdf_puts(p, "/Subtype/Link\n");
pdf_printf(p, "/Rect[%f %f %f %f]\n",
ann->rect.llx, ann->rect.lly, ann->rect.urx, ann->rect.ury);
pdf_write_border_style(p, ann);
pdf_printf(p, "/A<</S/URI/URI(");
pdf_puts(p, ann->filename);
pdf_puts(p, ")>>\n");
break;
case ann_attach:
pdf_puts(p, "/Subtype/FileAttachment\n");
pdf_printf(p, "/Rect[%f %f %f %f]\n",
ann->rect.llx, ann->rect.lly, ann->rect.urx, ann->rect.ury);
pdf_write_border_style(p, ann);
if (ann->icon != icon_file_pushpin) /* pushpin is default */
pdf_printf(p, "/Name/%s\n",
pdf_icon_names[ann->icon]);
if (ann->title) {
pdf_puts(p, "/T");
pdf_quote_string(p, ann->title);
pdf_putc(p, PDF_NEWLINE);
}
if (ann->contents) {
pdf_puts(p, "/Contents");
pdf_quote_string(p, ann->contents);
pdf_putc(p, PDF_NEWLINE);
}
/* the icon is too small without these flags (=28) */
pdf_printf(p, "/F %d\n",
pdf_ann_flag_print |
pdf_ann_flag_nozoom |
pdf_ann_flag_norotate);
pdf_puts(p, "/FS");
pdf_begin_dict(p); /* FS dict */
pdf_puts(p, "/Type/FileSpec\n");
pdf_printf(p, "/F(");
pdf_puts(p, ann->filename);
pdf_puts(p, ")\n");
/* alloc id for the actual embedded file stream */
ann->obj_id = pdf_alloc_id(p);
pdf_printf(p, "/EF<</F %ld 0 R>>\n", ann->obj_id);
pdf_end_dict(p); /* FS dict */
break;
default:
pdf_error(p, PDF_SystemError, "Unknown annotation type %d",
ann->type);
}
pdf_end_dict(p); /* Annotation dict */
pdf_end_obj(p); /* Annotation object */
}
/* Write the actual embedded files with preallocated ids */
for (ann = p->annots; ann != NULL; ann = ann->next) {
if (ann->type != ann_attach)
continue;
pdf_begin_obj(p, ann->obj_id); /* EmbeddedFile */
pdf_puts(p, "<</Type/EmbeddedFile\n");
if (ann->mimetype)
pdf_printf(p, "/Subtype (%s)\n", ann->mimetype);
if (p->compresslevel)
pdf_puts(p, "/Filter/FlateDecode\n");
length_id = pdf_alloc_id(p);
pdf_printf(p, "/Length %ld 0 R\n", length_id);
pdf_end_dict(p); /* F dict */
pdf_begin_stream(p); /* Embedded file stream */
start_pos = pdf_tell(p);
/* write the file in the PDF */
src.private_data = (void *) ann->filename;
src.init = pdf_data_source_file_init;
src.fill = pdf_data_source_file_fill;
src.terminate = pdf_data_source_file_terminate;
src.length = (long) 0;
src.offset = (long) 0;
pdf_compress(p, &src);
length = pdf_tell(p) - start_pos;
pdf_end_stream(p); /* Embedded file stream */
pdf_end_obj(p); /* EmbeddedFile object */
pdf_begin_obj(p, length_id); /* Length object */
pdf_printf(p, "%ld\n", length);
pdf_end_obj(p); /* Length object */
if (p->flush & PDF_FLUSH_CONTENT)
pdf_flush_stream(p);
}
}
void
pdf_put_image(PDF *p, int im, pdf_bool firststrip)
{
id length_id;
long length;
pdf_image *image;
int i;
image = &p->images[im];
/* york: how to check? see also F-imagecolor!
switch (image->colorspace) {
case ImageMask:
case DeviceGray:
case Indexed:
case DeviceRGB:
case DeviceCMYK:
break;
default:
pdf_error(p, PDF_SystemError, "Unknown color space");
break;
}
*/
/* Images may also be written to the output before the first page */
if (PDF_GET_STATE(p) == pdf_state_page)
pdf_end_contents_section(p);
/* Image object */
image->no = pdf_new_xobject(p, image_xobject, NEW_ID);
pdf_begin_dict(p); /* XObject */
pdf_puts(p, "/Type/XObject\n");
pdf_puts(p, "/Subtype/Image\n");
pdf_printf(p,"/Width %d\n", (int) image->width);
pdf_printf(p,"/Height %d\n", (int) image->height);
pdf_printf(p,"/BitsPerComponent %d\n", image->bpc);
/*
* Transparency handling
*/
/* Masking by color: single transparent color value */
if (image->transparent) {
if (image->colorspace == Indexed || image->colorspace == DeviceGray)
pdf_printf(p,"/Mask[%d %d]\n",
(int) image->transval[0], (int) image->transval[0]);
else if (image->colorspace == DeviceRGB)
pdf_printf(p,"/Mask[%d %d %d %d %d %d]\n",
(int) image->transval[0], (int) image->transval[0],
(int) image->transval[1], (int) image->transval[1],
(int) image->transval[2], (int) image->transval[2]);
else if (image->colorspace == DeviceCMYK)
pdf_printf(p,"/Mask[%d %d %d %d %d %d %d %d]\n",
(int) image->transval[0], (int) image->transval[0],
(int) image->transval[1], (int) image->transval[1],
(int) image->transval[2], (int) image->transval[2],
(int) image->transval[3], (int) image->transval[3]);
else
pdf_error(p, PDF_SystemError,
"Unknown color space with transparency");
/* Masking by position: separate bitmap mask */
} else if (image->mask != -1) {
pdf_printf(p, "/Mask %ld 0 R\n",
p->xobjects[p->images[image->mask].no].obj_id);
}
switch (image->colorspace) {
case ImageMask:
pdf_puts(p, "/ImageMask true\n");
break;
case Indexed:
if (firststrip)
image->colormap_id = pdf_alloc_id(p);
pdf_puts(p, "/ColorSpace[/Indexed/DeviceRGB ");
pdf_printf(p, "%d %ld 0 R]\n", image->palette_size - 1,
image->colormap_id);
break;
default:
/* colorize the image with a spot color */
if (image->colorspace >= LastCS) {
/* TODO: reconsider spot color numbering scheme */
int spot = image->colorspace - LastCS;
p->colorspaces[spot].used_on_current_page = pdf_true;
pdf_printf(p, "/ColorSpace %ld 0 R\n",
p->colorspaces[spot].obj_id);
/* the following is tricky: /Separation color space
* always works as a subtractive color space. The
* image, however, is Grayscale, and therefore
* additive.
*/
if (firststrip) {
image->invert = !image->invert;
}
} else {
pdf_printf(p, "/ColorSpace/%s\n",
pdf_colorspace_names[image->colorspace]);
}
break;
}
/* special case: referenced image data instead of direct data */
if (image->reference != pdf_ref_direct) {
if (image->compression != none) {
pdf_printf(p, "/FFilter[/%s]\n",
pdf_filter_names[image->compression]);
}
if (image->compression == ccitt) {
pdf_puts(p, "/FDecodeParms[<<");
if ((int) image->width != 1728) /* CCITT default width */
pdf_printf(p, "/Columns %d", (int) image->width);
pdf_printf(p, "/Rows %d", (int) image->height);
/* write CCITT parameters if required */
if (image->params)
pdf_puts(p, image->params);
pdf_puts(p, ">>]\n");
}
if (image->reference == pdf_ref_file) {
/* LATER: make image file name platform-neutral:
* Change : to / on the Mac
* Change \ to / on Windows
*/
pdf_printf(p, "/F(%s)/Length 0", image->filename);
} else if (image->reference == pdf_ref_url) {
pdf_printf(p, "/F<</FS/URL/F(%s)>>/Length 0", image->filename);
}
pdf_end_dict(p); /* XObject */
pdf_begin_stream(p); /* dummy image data */
pdf_end_stream(p); /* dummy image data */
if (PDF_GET_STATE(p) == pdf_state_page)
pdf_begin_contents_section(p);
pdf_end_obj(p); /* XObject */
return;
}
/*
* Now the (more common) handling of actual image
* data to be included in the PDF output.
*/
/* do we need a filter (either ASCII or decompression)? */
if (p->debug['a']) {
pdf_puts(p, "/Filter[/ASCIIHexDecode");
if (image->compression != none)
pdf_printf(p, "/%s", pdf_filter_names[image->compression]);
pdf_puts(p, "]\n");
} else {
/* force compression if not a recognized precompressed image format */
if (!image->use_raw && p->compresslevel)
image->compression = flate;
if (image->compression != none)
pdf_printf(p, "/Filter[/%s]\n",
pdf_filter_names[image->compression]);
}
/* prepare precompressed (raw) image data */
if (image->use_raw) {
pdf_printf(p, "/DecodeParms[%s<<", (p->debug['a'] ? "null" : ""));
/* write EarlyChange or CCITT parameters if required */
if (image->params)
pdf_puts(p, image->params);
if (image->compression == flate || image->compression == lzw) {
if (image->predictor != pred_default) {
pdf_printf(p, "/Predictor %d", (int) image->predictor);
pdf_printf(p, "/Columns %d", (int) image->width);
if (image->bpc != 8)
pdf_printf(p, "/BitsPerComponent %d", image->bpc);
if (image->colorspace < LastCS) {
switch (image->colorspace) {
case Indexed:
case ImageMask:
case DeviceGray:
/* 1 is default */
break;
case DeviceRGB:
pdf_puts(p, "/Colors 3");
break;
case DeviceCMYK:
pdf_puts(p, "/Colors 4");
break;
default:
pdf_error(p, PDF_SystemError,
"Unknown colorspace (%d)", (int )image->colorspace);
break;
}
}
}
}
if (image->compression == ccitt) {
if ((int) image->width != 1728) /* CCITT default width */
pdf_printf(p, "/Columns %d", (int) image->width);
pdf_printf(p, "/Rows %d", (int) image->height);
}
pdf_puts(p, ">>]\n"); /* DecodeParms dict and array */
}
if (image->invert) {
pdf_puts(p, "/Decode[1 0");
for (i = 1; i < image->components; i++)
pdf_puts(p, " 1 0");
pdf_puts(p, "]\n");
}
/* Write the actual image data */
length_id = pdf_alloc_id(p);
pdf_printf(p,"/Length %ld 0 R\n", length_id);
pdf_end_dict(p); /* XObject */
pdf_begin_stream(p); /* image data */
p->start_contents_pos = pdf_tell(p);
/* image data */
if (p->debug['a'])
pdf_ASCIIHexEncode(p, &image->src);
else {
if (image->use_raw)
pdf_copy(p, &image->src);
else
pdf_compress(p, &image->src);
}
length = pdf_tell(p) - p->start_contents_pos;
pdf_end_stream(p); /* image data */
pdf_end_obj(p); /* XObject */
pdf_begin_obj(p, length_id); /* Length object */
pdf_printf(p,"%ld\n", length);
pdf_end_obj(p);
if (p->flush & PDF_FLUSH_CONTENT)
pdf_flush_stream(p);
/* Image data done */
/*
* Write colormap information for indexed color spaces
*/
if (firststrip && image->colorspace == Indexed) {
pdf_begin_obj(p, image->colormap_id); /* colormap object */
pdf_begin_dict(p);
if (p->debug['a'])
pdf_puts(p, "/Filter[/ASCIIHexDecode]\n");
else if (p->compresslevel)
pdf_puts(p, "/Filter[/FlateDecode]\n");
/* Length of colormap object */
length_id = pdf_alloc_id(p);
pdf_printf(p,"/Length %ld 0 R\n", length_id);
pdf_end_dict(p);
pdf_begin_stream(p); /* colormap data */
p->start_contents_pos = pdf_tell(p);
if (image->components != 1) {
pdf_error(p, PDF_SystemError,
"Bogus indexed colorspace (%d color components)",
image->components);
}
image->src.init = pdf_noop;
image->src.fill = pdf_data_source_buf_fill;
image->src.terminate = pdf_noop;
image->src.buffer_start = (unsigned char *) image->colormap;
image->src.buffer_length= (size_t) (image->palette_size * 3);
image->src.bytes_available = 0;
image->src.next_byte = NULL;
/* Write colormap data */
if (p->debug['a'])
pdf_ASCIIHexEncode(p, &image->src);
else {
pdf_compress(p, &image->src);
}
length = pdf_tell(p) - p->start_contents_pos;
pdf_end_stream(p); /* Colormap data */
pdf_end_obj(p); /* Colormap object */
pdf_begin_obj(p, length_id); /* Length object for colormap */
pdf_printf(p, "%ld\n", length);
pdf_end_obj(p); /* Length object for colormap */
}
if (PDF_GET_STATE(p) == pdf_state_page)
pdf_begin_contents_section(p);
if (p->flush & PDF_FLUSH_CONTENT)
pdf_flush_stream(p);
}
