static pdf_annot *
pdf_create_highlight_annot(pdf_xref *xref, fz_obj *obj)
{
fz_context *ctx = xref->ctx;
fz_buffer *content = fz_new_buffer(ctx, 512);
fz_rect rect = pdf_to_rect(ctx, fz_dict_gets(ctx, obj, "Rect"));
fz_obj *quad_points = fz_dict_gets(ctx, obj, "QuadPoints");
fz_obj *resources = pdf_dict_from_string(xref, ANNOT_HIGHLIGHT_AP_RESOURCES);
fz_rect a, b;
float rgb[3];
float skew;
int i;
for (i = 0; i < fz_array_len(ctx, quad_points) / 8; i++)
{
pdf_get_quadrilaterals(ctx, quad_points, i, &a, &b);
skew = 0.15 * fabs(a.y0 - b.y0);
b.x0 -= skew; b.x1 += skew;
rect = fz_union_rect(rect, fz_union_rect(a, b));
}
pdf_get_annot_color(ctx, obj, rgb);
fz_buffer_printf(ctx, content, "q /GS gs %.4f %.4f %.4f rg 1 0 0 1 -%.4f -%.4f cm ",
rgb[0], rgb[1], rgb[2], rect.x0, rect.y0);
for (i = 0; i < fz_array_len(ctx, quad_points) / 8; i++)
{
pdf_get_quadrilaterals(ctx, quad_points, i, &a, &b);
skew = 0.15 * fabs(a.y0 - b.y0);
fz_buffer_printf(ctx, content, "%.4f %.4f m %.4f %.4f l %.4f %.4f l %.4f %.4f l h ",
a.x0, a.y0, b.x1 + skew, b.y1, a.x1, a.y1, b.x0 - skew, b.y0);
}
fz_buffer_printf(ctx, content, "f Q");
return pdf_create_annot(ctx, rect, fz_keep_obj(obj), content, resources, 1);
}
static pdf_annot *
pdf_create_freetext_annot(pdf_xref *xref, fz_obj *obj)
{
fz_context *ctx = xref->ctx;
fz_buffer *content = fz_new_buffer(ctx, 256);
fz_buffer *base_ap = fz_new_buffer(ctx, 256);
fz_obj *ap = fz_dict_gets(ctx, obj, "DA");
fz_obj *value = fz_dict_gets(ctx, obj, "Contents");
fz_rect rect = pdf_to_rect(ctx, fz_dict_gets(ctx, obj, "Rect"));
int align = fz_to_int(ctx, fz_dict_gets(ctx, obj, "Q"));
fz_obj *res = pdf_dict_from_string(xref, ANNOT_FREETEXT_AP_RESOURCES);
unsigned short *ucs2, *rest;
float x;
char *font_name = NULL;
float font_size = pdf_extract_font_size(xref, fz_to_str_buf(ctx, ap), &font_name);
if (!font_size)
font_size = 10;
/* TODO: what resource dictionary does this font name refer to? */
if (font_name)
{
fz_obj *font = fz_dict_gets(ctx, res, "Font");
fz_dict_puts(ctx, font, font_name, fz_dict_gets(ctx, font, "Default"));
fz_free(ctx, font_name);
}
fz_buffer_printf(ctx, content, "q 1 1 %.4f %.4f re W n BT %s ",
rect.x1 - rect.x0 - 2.0f, rect.y1 - rect.y0 - 2.0f, fz_to_str_buf(ctx, ap));
fz_buffer_printf(ctx, base_ap, "q BT %s ", fz_to_str_buf(ctx, ap));
fz_buffer_printf(ctx, content, "/Default %.4f Tf ", font_size);
fz_buffer_printf(ctx, base_ap, "/Default %.4f Tf ", font_size);
fz_buffer_printf(ctx, content, "1 0 0 1 2 %.4f Tm ", rect.y1 - rect.y0 - 2);
/* Adobe Reader seems to consider "[1 0 0] r" and "1 0 0 rg" to mean the same(?) */
if (strchr(base_ap->data, '['))
{
float r, g, b;
if (sscanf(strchr(base_ap->data, '['), "[%f %f %f] r", &r, &g, &b) == 3)
fz_buffer_printf(ctx, content, "%.4f %.4f %.4f rg ", r, g, b);
}
ucs2 = pdf_to_ucs2(ctx, value);
for (rest = ucs2; *rest; rest++)
if (*rest > 0xFF)
*rest = '?';
x = 0;
rest = ucs2;
while (*rest)
rest = pdf_append_line(xref, res, content, base_ap, rest, font_size, align, rect.x1 - rect.x0 - 4.0f, 1, &x);
fz_free(ctx, ucs2);
fz_buffer_printf(ctx, content, "ET Q");
fz_drop_buffer(ctx, base_ap);
return pdf_create_annot(ctx, rect, fz_keep_obj(obj), content, res, 0);
}
fz_error
pdf_load_pattern(pdf_pattern **patp, pdf_xref *xref, fz_obj *dict)
{
fz_error error;
pdf_pattern *pat;
fz_obj *obj;
if ((*patp = pdf_find_item(xref->store, pdf_drop_pattern, dict)))
{
pdf_keep_pattern(*patp);
return fz_okay;
}
pat = fz_malloc(sizeof(pdf_pattern));
pat->refs = 1;
pat->resources = NULL;
pat->contents = NULL;
/* Store pattern now, to avoid possible recursion if objects refer back to this one */
pdf_store_item(xref->store, pdf_keep_pattern, pdf_drop_pattern, dict, pat);
pat->ismask = fz_to_int(fz_dict_gets(dict, "PaintType")) == 2;
pat->xstep = fz_to_real(fz_dict_gets(dict, "XStep"));
pat->ystep = fz_to_real(fz_dict_gets(dict, "YStep"));
obj = fz_dict_gets(dict, "BBox");
pat->bbox = pdf_to_rect(obj);
obj = fz_dict_gets(dict, "Matrix");
if (obj)
pat->matrix = pdf_to_matrix(obj);
else
pat->matrix = fz_identity;
pat->resources = fz_dict_gets(dict, "Resources");
if (pat->resources)
fz_keep_obj(pat->resources);
error = pdf_load_stream(&pat->contents, xref, fz_to_num(dict), fz_to_gen(dict));
if (error)
{
pdf_remove_item(xref->store, pdf_drop_pattern, dict);
pdf_drop_pattern(pat);
return fz_rethrow(error, "cannot load pattern stream (%d %d R)", fz_to_num(dict), fz_to_gen(dict));
}
*patp = pat;
return fz_okay;
}
fz_error
pdf_load_object(fz_obj **objp, pdf_xref *xref, int num, int gen)
{
fz_error error;
error = pdf_cache_object(xref, num, gen);
if (error)
return fz_rethrow(error, "cannot load object (%d %d R) into cache", num, gen);
assert(xref->table[num].obj);
*objp = fz_keep_obj(xref->table[num].obj);
return fz_okay;
}
void
fz_array_push(fz_obj *obj, fz_obj *item)
{
RESOLVE(obj);
if (!obj)
return; /* Can't warn :( */
if (obj->kind != FZ_ARRAY)
fz_warn(obj->ctx, "assert: not an array (%s)", fz_objkindstr(obj));
else
{
if (obj->u.a.len + 1 > obj->u.a.cap)
fz_array_grow(obj);
obj->u.a.items[obj->u.a.len] = fz_keep_obj(item);
obj->u.a.len++;
}
}
void
fz_array_insert(fz_obj *obj, fz_obj *item)
{
RESOLVE(obj);
if (!obj)
return; /* Can't warn :( */
if (obj->kind != FZ_ARRAY)
fz_warn(obj->ctx, "assert: not an array (%s)", fz_objkindstr(obj));
else
{
if (obj->u.a.len + 1 > obj->u.a.cap)
fz_array_grow(obj);
memmove(obj->u.a.items + 1, obj->u.a.items, obj->u.a.len * sizeof(fz_obj*));
obj->u.a.items[0] = fz_keep_obj(item);
obj->u.a.len++;
}
}
void
fz_array_put(fz_obj *obj, int i, fz_obj *item)
{
RESOLVE(obj);
if (!obj)
return; /* Can't warn :( */
if (obj->kind != FZ_ARRAY)
fz_warn(obj->ctx, "assert: not an array (%s)", fz_objkindstr(obj));
else if (i < 0)
fz_warn(obj->ctx, "assert: index %d < 0", i);
else if (i >= obj->u.a.len)
fz_warn(obj->ctx, "assert: index %d > length %d", i, obj->u.a.len);
else
{
if (obj->u.a.items[i])
fz_drop_obj(obj->u.a.items[i]);
obj->u.a.items[i] = fz_keep_obj(item);
}
}
/* Replace numbered object -- for use by pdfclean and similar tools */
void
pdf_update_object(pdf_xref *xref, int num, int gen, fz_obj *newobj)
{
pdf_xref_entry *x;
if (num < 0 || num >= xref->len)
{
fz_warn("object out of range (%d %d R); xref size %d", num, gen, xref->len);
return;
}
x = &xref->table[num];
if (x->obj)
fz_drop_obj(x->obj);
x->obj = fz_keep_obj(newobj);
x->type = 'n';
x->ofs = 0;
}
static pdf_annot *
pdf_create_markup_annot(pdf_xref *xref, fz_obj *obj, char *type)
{
fz_context *ctx = xref->ctx;
fz_buffer *content = fz_new_buffer(ctx, 512);
fz_rect rect = pdf_to_rect(ctx, fz_dict_gets(ctx, obj, "Rect"));
fz_obj *quad_points = fz_dict_gets(ctx, obj, "QuadPoints");
fz_rect a, b;
float rgb[3];
int i;
for (i = 0; i < fz_array_len(ctx, quad_points) / 8; i++)
{
pdf_get_quadrilaterals(ctx, quad_points, i, &a, &b);
b.y0 -= 0.25; a.y1 += 0.25;
rect = fz_union_rect(rect, fz_union_rect(a, b));
}
pdf_get_annot_color(ctx, obj, rgb);
fz_buffer_printf(ctx, content, "q %.4f %.4f %.4f RG 1 0 0 1 -%.4f -%.4f cm 0.5 w ",
rgb[0], rgb[1], rgb[2], rect.x0, rect.y0);
if (!strcmp(type, "Squiggly"))
fz_buffer_printf(ctx, content, "[1 1] d ");
for (i = 0; i < fz_array_len(ctx, quad_points) / 8; i++)
{
pdf_get_quadrilaterals(ctx, quad_points, i, &a, &b);
if (!strcmp(type, "StrikeOut"))
fz_buffer_printf(ctx, content, "%.4f %.4f m %.4f %.4f l ",
(a.x0 + b.x0) / 2, (a.y0 + b.y0) / 2, (a.x1 + b.x1) / 2, (a.y1 + b.y1) / 2);
else
fz_buffer_printf(ctx, content, "%.4f %.4f m %.4f %.4f l ", b.x0, b.y0, a.x1, a.y1);
}
fz_buffer_printf(ctx, content, "S Q");
return pdf_create_annot(ctx, rect, fz_keep_obj(obj), content, NULL, 0);
}
fz_error
pdf_ocg_set_config(pdf_xref *xref, int config)
{
int i, j, len, len2;
pdf_ocg_descriptor *desc = xref->ocg;
fz_obj *obj, *cobj;
char *name;
obj = fz_dict_gets(fz_dict_gets(xref->trailer, "Root"), "OCProperties");
if (obj == NULL)
{
if (config == 0)
return fz_okay;
else
return fz_throw("Unknown OCG config (None known!)");
}
if (config == 0)
{
cobj = fz_dict_gets(obj, "D");
if (cobj == NULL)
return fz_throw("No default OCG config");
}
else
{
cobj = fz_array_get(fz_dict_gets(obj, "Configs"), config);
if (cobj == NULL)
return fz_throw("Illegal OCG config");
}
if (desc->intent != NULL)
fz_drop_obj(desc->intent);
desc->intent = fz_dict_gets(cobj, "Intent");
if (desc->intent != NULL)
fz_keep_obj(desc->intent);
len = desc->len;
name = fz_to_name(fz_dict_gets(cobj, "BaseState"));
if (strcmp(name, "Unchanged") == 0)
{
/* Do nothing */
}
else if (strcmp(name, "OFF") == 0)
{
for (i = 0; i < len; i++)
{
desc->ocgs[i].state = 0;
}
}
else /* Default to ON */
{
for (i = 0; i < len; i++)
{
desc->ocgs[i].state = 1;
}
}
obj = fz_dict_gets(cobj, "ON");
len2 = fz_array_len(obj);
for (i = 0; i < len2; i++)
{
fz_obj *o = fz_array_get(obj, i);
int n = fz_to_num(o);
int g = fz_to_gen(o);
for (j=0; j < len; j++)
{
if (desc->ocgs[j].num == n && desc->ocgs[j].gen == g)
{
desc->ocgs[j].state = 1;
break;
}
}
}
obj = fz_dict_gets(cobj, "OFF");
len2 = fz_array_len(obj);
for (i = 0; i < len2; i++)
{
fz_obj *o = fz_array_get(obj, i);
int n = fz_to_num(o);
int g = fz_to_gen(o);
for (j=0; j < len; j++)
{
if (desc->ocgs[j].num == n && desc->ocgs[j].gen == g)
{
desc->ocgs[j].state = 0;
break;
}
}
}
/* FIXME: Should make 'num configs' available in the descriptor. */
/* FIXME: Should copy out 'Intent' here into the descriptor, and remove
* csi->intent in favour of that. */
/* FIXME: Should copy 'AS' into the descriptor, and visibility
* decisions should respect it. */
/* FIXME: Make 'Order' available via the descriptor (when we have an
* app that needs it) */
/* FIXME: Make 'ListMode' available via the descriptor (when we have
* an app that needs it) */
/* FIXME: Make 'RBGroups' available via the descriptor (when we have
* an app that needs it) */
/* FIXME: Make 'Locked' available via the descriptor (when we have
* an app that needs it) */
return fz_okay;
}
void
pdf_load_annots(pdf_annot **annotp, pdf_xref *xref, fz_obj *annots)
{
pdf_annot *annot, *head, *tail;
fz_obj *obj, *ap, *as, *n, *rect;
pdf_xobject *form;
fz_error error;
int i;
fz_context *ctx = xref->ctx;
head = tail = NULL;
annot = NULL;
for (i = 0; i < fz_array_len(ctx, annots); i++)
{
obj = fz_array_get(ctx, annots, i);
/* cf. http://bugs.ghostscript.com/show_bug.cgi?id=692078 */
if ((annot = pdf_update_tx_widget_annot(xref, obj)))
{
if (!head)
head = tail = annot;
else
{
tail->next = annot;
tail = annot;
}
continue;
}
rect = fz_dict_gets(ctx, obj, "Rect");
ap = fz_dict_gets(ctx, obj, "AP");
as = fz_dict_gets(ctx, obj, "AS");
if (fz_is_dict(ctx, ap))
{
n = fz_dict_gets(ctx, ap, "N"); /* normal state */
/* lookup current state in sub-dictionary */
if (!pdf_is_stream(xref, fz_to_num(n), fz_to_gen(n)))
n = fz_dict_get(ctx, n, as);
if (pdf_is_stream(xref, fz_to_num(n), fz_to_gen(n)))
{
error = pdf_load_xobject(&form, xref, n);
if (error)
{
fz_error_handle(ctx, error, "ignoring broken annotation");
continue;
}
annot = fz_malloc(ctx, sizeof(pdf_annot));
annot->obj = fz_keep_obj(obj);
annot->rect = pdf_to_rect(ctx, rect);
annot->ap = form;
annot->next = NULL;
pdf_transform_annot(annot);
if (annot)
{
if (!head)
head = tail = annot;
else
{
tail->next = annot;
tail = annot;
}
}
}
}
/* SumatraPDF: synthesize appearance streams for a few more annotations */
else if ((annot = pdf_create_annot_with_appearance(xref, obj)))
{
if (!head)
head = tail = annot;
else
{
tail->next = annot;
tail = annot;
}
}
}
*annotp = head;
}
static pdf_annot *
pdf_update_tx_widget_annot(pdf_xref *xref, fz_obj *obj)
{
fz_obj *ap, *res, *value;
fz_rect rect;
fz_buffer *content, *base_ap;
int flags, align, rotate, is_multiline;
float font_size, x, y;
char *font_name;
unsigned short *ucs2, *rest;
fz_context *ctx = xref->ctx;
if (strcmp(fz_to_name(ctx, fz_dict_gets(ctx, obj, "Subtype")), "Widget") != 0)
return NULL;
if (!fz_to_bool(ctx, pdf_dict_get_inheritable(xref, NULL, "NeedAppearances")) && pdf_get_ap_stream(xref, obj))
return NULL;
value = pdf_dict_get_inheritable(xref, obj, "FT");
if (strcmp(fz_to_name(ctx, value), "Tx") != 0)
return NULL;
ap = pdf_dict_get_inheritable(xref, obj, "DA");
value = pdf_dict_get_inheritable(xref, obj, "V");
if (!ap || !value)
return NULL;
res = pdf_dict_get_inheritable(xref, obj, "DR");
rect = pdf_to_rect(ctx, fz_dict_gets(ctx, obj, "Rect"));
rotate = fz_to_int(ctx, fz_dict_gets(ctx, fz_dict_gets(ctx, obj, "MK"), "R"));
rect = fz_transform_rect(fz_rotate(rotate), rect);
flags = fz_to_int(ctx, fz_dict_gets(ctx, obj, "Ff"));
is_multiline = (flags & (1 << 12)) != 0;
if ((flags & (1 << 25) /* richtext */))
fz_warn(ctx, "missing support for richtext fields");
align = fz_to_int(ctx, fz_dict_gets(ctx, obj, "Q"));
font_size = pdf_extract_font_size(xref, fz_to_str_buf(ctx, ap), &font_name);
if (!font_size || !font_name)
font_size = is_multiline ? 10 /* FIXME */ : floor(rect.y1 - rect.y0 - 2);
content = fz_new_buffer(ctx, 256);
base_ap = fz_new_buffer(ctx, 256);
pdf_prepend_ap_background(content, xref, obj);
fz_buffer_printf(ctx, content, "/Tx BMC q 1 1 %.4f %.4f re W n BT %s ",
rect.x1 - rect.x0 - 2.0f, rect.y1 - rect.y0 - 2.0f, fz_to_str_buf(ctx, ap));
fz_buffer_printf(ctx, base_ap, "/Tx BMC q BT %s ", fz_to_str_buf(ctx, ap));
if (font_name)
{
fz_buffer_printf(ctx, content, "/%s %.4f Tf ", font_name, font_size);
fz_buffer_printf(ctx, base_ap, "/%s %.4f Tf ", font_name, font_size);
fz_free(ctx, font_name);
}
y = 0.5f * (rect.y1 - rect.y0) + 0.6f * font_size;
if (is_multiline)
y = rect.y1 - rect.y0 - 2;
fz_buffer_printf(ctx, content, "1 0 0 1 2 %.4f Tm ", y);
ucs2 = pdf_to_ucs2(ctx, value);
for (rest = ucs2; *rest; rest++)
if (*rest > 0xFF)
*rest = '?';
if ((flags & (1 << 13) /* password */))
for (rest = ucs2; *rest; rest++)
*rest = '*';
x = 0;
rest = ucs2;
if ((flags & (1 << 24) /* comb */))
{
pdf_append_combed_line(xref, res, content, base_ap, ucs2, font_size, rect.x1 - rect.x0, fz_to_int(ctx, pdf_dict_get_inheritable(xref, obj, "MaxLen")));
rest = L"";
}
while (*rest)
rest = pdf_append_line(xref, res, content, base_ap, rest, font_size, align, rect.x1 - rect.x0 - 4.0f, is_multiline, &x);
fz_free(ctx, ucs2);
fz_buffer_printf(ctx, content, "ET Q EMC");
fz_drop_buffer(ctx, base_ap);
rect = fz_transform_rect(fz_rotate(-rotate), rect);
return pdf_create_annot(ctx, rect, fz_keep_obj(obj), content, res ? fz_keep_obj(res) : NULL, 0);
}
pdf_link *
pdf_load_link(pdf_xref *xref, fz_obj *dict)
{
fz_obj *dest;
fz_obj *action;
fz_obj *obj;
fz_rect bbox;
pdf_link_kind kind;
fz_context *ctx = xref->ctx;
dest = NULL;
obj = fz_dict_gets(ctx, dict, "Rect");
if (obj)
bbox = pdf_to_rect(ctx, obj);
else
bbox = fz_empty_rect;
obj = fz_dict_gets(ctx, dict, "Dest");
if (obj)
{
kind = PDF_LINK_GOTO;
dest = resolve_dest(xref, obj);
}
action = fz_dict_gets(ctx, dict, "A");
/* fall back to additional action button's down/up action */
if (!action)
action = fz_dict_getsa(ctx, fz_dict_gets(ctx, dict, "AA"), "U", "D");
if (action)
{
obj = fz_dict_gets(ctx, action, "S");
if (fz_is_name(ctx, obj) && !strcmp(fz_to_name(ctx, obj), "GoTo"))
{
kind = PDF_LINK_GOTO;
dest = resolve_dest(xref, fz_dict_gets(ctx, action, "D"));
}
else if (fz_is_name(ctx, obj) && !strcmp(fz_to_name(ctx, obj), "URI"))
{
kind = PDF_LINK_URI;
dest = fz_dict_gets(ctx, action, "URI");
}
else if (fz_is_name(ctx, obj) && !strcmp(fz_to_name(ctx, obj), "Launch"))
{
kind = PDF_LINK_LAUNCH;
dest = fz_dict_gets(ctx, action, "F");
}
else if (fz_is_name(ctx, obj) && !strcmp(fz_to_name(ctx, obj), "Named"))
{
kind = PDF_LINK_NAMED;
dest = fz_dict_gets(ctx, action, "N");
}
else if (fz_is_name(ctx, obj) && (!strcmp(fz_to_name(ctx, obj), "GoToR")))
{
kind = PDF_LINK_ACTION;
dest = action;
}
else
{
dest = NULL;
}
}
if (dest)
{
pdf_link *link = fz_malloc(ctx, sizeof(pdf_link));
link->kind = kind;
link->rect = bbox;
link->dest = fz_keep_obj(dest);
link->next = NULL;
return link;
}
return NULL;
}