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|
#include "mupdf/pdf.h"
#define SMALL_FLOAT (0.00001)
static pdf_obj *
resolve_dest_rec(pdf_document *doc, pdf_obj *dest, int depth)
{
if (depth > 10) /* Arbitrary to avoid infinite recursion */
return NULL;
if (pdf_is_name(dest) || pdf_is_string(dest))
{
dest = pdf_lookup_dest(doc, dest);
return resolve_dest_rec(doc, dest, depth+1);
}
else if (pdf_is_array(dest))
{
return dest;
}
else if (pdf_is_dict(dest))
{
dest = pdf_dict_gets(dest, "D");
return resolve_dest_rec(doc, dest, depth+1);
}
else if (pdf_is_indirect(dest))
return dest;
return NULL;
}
static pdf_obj *
resolve_dest(pdf_document *doc, pdf_obj *dest)
{
return resolve_dest_rec(doc, dest, 0);
}
fz_link_dest
pdf_parse_link_dest(pdf_document *doc, pdf_obj *dest)
{
fz_link_dest ld;
pdf_obj *obj;
int l_from_2 = 0;
int b_from_3 = 0;
int r_from_4 = 0;
int t_from_5 = 0;
int t_from_3 = 0;
int t_from_2 = 0;
int z_from_4 = 0;
dest = resolve_dest(doc, dest);
if (dest == NULL || !pdf_is_array(dest))
{
ld.kind = FZ_LINK_NONE;
return ld;
}
obj = pdf_array_get(dest, 0);
if (pdf_is_int(obj))
ld.ld.gotor.page = pdf_to_int(obj);
else
ld.ld.gotor.page = pdf_lookup_page_number(doc, obj);
ld.kind = FZ_LINK_GOTO;
ld.ld.gotor.flags = 0;
ld.ld.gotor.lt.x = 0;
ld.ld.gotor.lt.y = 0;
ld.ld.gotor.rb.x = 0;
ld.ld.gotor.rb.y = 0;
ld.ld.gotor.file_spec = NULL;
ld.ld.gotor.new_window = 0;
obj = pdf_array_get(dest, 1);
if (!pdf_is_name(obj))
return ld;
if (!strcmp("XYZ", pdf_to_name(obj)))
{
l_from_2 = t_from_3 = z_from_4 = 1;
ld.ld.gotor.flags |= fz_link_flag_r_is_zoom;
}
else if ((!strcmp("Fit", pdf_to_name(obj))) || (!strcmp("FitB", pdf_to_name(obj))))
{
ld.ld.gotor.flags |= fz_link_flag_fit_h;
ld.ld.gotor.flags |= fz_link_flag_fit_v;
}
else if ((!strcmp("FitH", pdf_to_name(obj))) || (!strcmp("FitBH", pdf_to_name(obj))))
{
t_from_2 = 1;
ld.ld.gotor.flags |= fz_link_flag_fit_h;
}
else if ((!strcmp("FitV", pdf_to_name(obj))) || (!strcmp("FitBV", pdf_to_name(obj))))
{
l_from_2 = 1;
ld.ld.gotor.flags |= fz_link_flag_fit_v;
}
else if (!strcmp("FitR", pdf_to_name(obj)))
{
l_from_2 = b_from_3 = r_from_4 = t_from_5 = 1;
ld.ld.gotor.flags |= fz_link_flag_fit_h;
ld.ld.gotor.flags |= fz_link_flag_fit_v;
}
if (l_from_2)
{
obj = pdf_array_get(dest, 2);
if (pdf_is_int(obj))
{
ld.ld.gotor.flags |= fz_link_flag_l_valid;
ld.ld.gotor.lt.x = pdf_to_int(obj);
}
else if (pdf_is_real(obj))
{
ld.ld.gotor.flags |= fz_link_flag_l_valid;
ld.ld.gotor.lt.x = pdf_to_real(obj);
}
}
if (b_from_3)
{
obj = pdf_array_get(dest, 3);
if (pdf_is_int(obj))
{
ld.ld.gotor.flags |= fz_link_flag_b_valid;
ld.ld.gotor.rb.y = pdf_to_int(obj);
}
else if (pdf_is_real(obj))
{
ld.ld.gotor.flags |= fz_link_flag_b_valid;
ld.ld.gotor.rb.y = pdf_to_real(obj);
}
}
if (r_from_4)
{
obj = pdf_array_get(dest, 4);
if (pdf_is_int(obj))
{
ld.ld.gotor.flags |= fz_link_flag_r_valid;
ld.ld.gotor.rb.x = pdf_to_int(obj);
}
else if (pdf_is_real(obj))
{
ld.ld.gotor.flags |= fz_link_flag_r_valid;
ld.ld.gotor.rb.x = pdf_to_real(obj);
}
}
if (t_from_5 || t_from_3 || t_from_2)
{
if (t_from_5)
obj = pdf_array_get(dest, 5);
else if (t_from_3)
obj = pdf_array_get(dest, 3);
else
obj = pdf_array_get(dest, 2);
if (pdf_is_int(obj))
{
ld.ld.gotor.flags |= fz_link_flag_t_valid;
ld.ld.gotor.lt.y = pdf_to_int(obj);
}
else if (pdf_is_real(obj))
{
ld.ld.gotor.flags |= fz_link_flag_t_valid;
ld.ld.gotor.lt.y = pdf_to_real(obj);
}
}
if (z_from_4)
{
obj = pdf_array_get(dest, 4);
if (pdf_is_int(obj))
{
ld.ld.gotor.flags |= fz_link_flag_r_valid;
ld.ld.gotor.rb.x = pdf_to_int(obj);
}
else if (pdf_is_real(obj))
{
ld.ld.gotor.flags |= fz_link_flag_r_valid;
ld.ld.gotor.rb.x = pdf_to_real(obj);
}
}
/* Duplicate the values out for the sake of stupid clients */
if ((ld.ld.gotor.flags & (fz_link_flag_l_valid | fz_link_flag_r_valid)) == fz_link_flag_l_valid)
ld.ld.gotor.rb.x = ld.ld.gotor.lt.x;
if ((ld.ld.gotor.flags & (fz_link_flag_l_valid | fz_link_flag_r_valid | fz_link_flag_r_is_zoom)) == fz_link_flag_r_valid)
ld.ld.gotor.lt.x = ld.ld.gotor.rb.x;
if ((ld.ld.gotor.flags & (fz_link_flag_t_valid | fz_link_flag_b_valid)) == fz_link_flag_t_valid)
ld.ld.gotor.rb.y = ld.ld.gotor.lt.y;
if ((ld.ld.gotor.flags & (fz_link_flag_t_valid | fz_link_flag_b_valid)) == fz_link_flag_b_valid)
ld.ld.gotor.lt.y = ld.ld.gotor.rb.y;
return ld;
}
static char *
pdf_parse_file_spec(pdf_document *doc, pdf_obj *file_spec)
{
fz_context *ctx = doc->ctx;
pdf_obj *filename;
if (pdf_is_string(file_spec))
return pdf_to_utf8(doc, file_spec);
if (pdf_is_dict(file_spec)) {
filename = pdf_dict_gets(file_spec, "UF");
if (!filename)
filename = pdf_dict_gets(file_spec, "F");
if (!filename)
filename = pdf_dict_gets(file_spec, "Unix");
if (!filename)
filename = pdf_dict_gets(file_spec, "Mac");
if (!filename)
filename = pdf_dict_gets(file_spec, "DOS");
return pdf_to_utf8(doc, filename);
}
fz_warn(ctx, "cannot parse file specification");
return NULL;
}
fz_link_dest
pdf_parse_action(pdf_document *doc, pdf_obj *action)
{
fz_link_dest ld;
pdf_obj *obj, *dest;
fz_context *ctx = doc->ctx;
UNUSED(ctx);
ld.kind = FZ_LINK_NONE;
if (!action)
return ld;
obj = pdf_dict_gets(action, "S");
if (!strcmp(pdf_to_name(obj), "GoTo"))
{
dest = pdf_dict_gets(action, "D");
ld = pdf_parse_link_dest(doc, dest);
}
else if (!strcmp(pdf_to_name(obj), "URI"))
{
ld.kind = FZ_LINK_URI;
ld.ld.uri.is_map = pdf_to_bool(pdf_dict_gets(action, "IsMap"));
ld.ld.uri.uri = pdf_to_utf8(doc, pdf_dict_gets(action, "URI"));
}
else if (!strcmp(pdf_to_name(obj), "Launch"))
{
ld.kind = FZ_LINK_LAUNCH;
dest = pdf_dict_gets(action, "F");
ld.ld.launch.file_spec = pdf_parse_file_spec(doc, dest);
ld.ld.launch.new_window = pdf_to_int(pdf_dict_gets(action, "NewWindow"));
}
else if (!strcmp(pdf_to_name(obj), "Named"))
{
ld.kind = FZ_LINK_NAMED;
ld.ld.named.named = pdf_to_utf8(doc, pdf_dict_gets(action, "N"));
}
else if (!strcmp(pdf_to_name(obj), "GoToR"))
{
dest = pdf_dict_gets(action, "D");
ld = pdf_parse_link_dest(doc, dest);
ld.kind = FZ_LINK_GOTOR;
dest = pdf_dict_gets(action, "F");
ld.ld.gotor.file_spec = pdf_parse_file_spec(doc, dest);
ld.ld.gotor.new_window = pdf_to_int(pdf_dict_gets(action, "NewWindow"));
}
return ld;
}
static fz_link *
pdf_load_link(pdf_document *doc, pdf_obj *dict, const fz_matrix *page_ctm)
{
pdf_obj *dest = NULL;
pdf_obj *action;
pdf_obj *obj;
fz_rect bbox;
fz_context *ctx = doc->ctx;
fz_link_dest ld;
obj = pdf_dict_gets(dict, "Rect");
if (obj)
pdf_to_rect(ctx, obj, &bbox);
else
bbox = fz_empty_rect;
fz_transform_rect(&bbox, page_ctm);
obj = pdf_dict_gets(dict, "Dest");
if (obj)
{
dest = resolve_dest(doc, obj);
ld = pdf_parse_link_dest(doc, dest);
}
else
{
action = pdf_dict_gets(dict, "A");
/* fall back to additional action button's down/up action */
if (!action)
action = pdf_dict_getsa(pdf_dict_gets(dict, "AA"), "U", "D");
ld = pdf_parse_action(doc, action);
}
if (ld.kind == FZ_LINK_NONE)
return NULL;
return fz_new_link(ctx, &bbox, ld);
}
fz_link *
pdf_load_link_annots(pdf_document *doc, pdf_obj *annots, const fz_matrix *page_ctm)
{
fz_link *link, *head, *tail;
pdf_obj *obj;
int i, n;
head = tail = NULL;
link = NULL;
n = pdf_array_len(annots);
for (i = 0; i < n; i++)
{
fz_try(doc->ctx)
{
obj = pdf_array_get(annots, i);
link = pdf_load_link(doc, obj, page_ctm);
}
fz_catch(doc->ctx)
{
/* FIXME: TryLater */
link = NULL;
}
if (link)
{
if (!head)
head = tail = link;
else
{
tail->next = link;
tail = link;
}
}
}
return head;
}
void
pdf_free_annot(fz_context *ctx, pdf_annot *annot)
{
pdf_annot *next;
while (annot)
{
next = annot->next;
if (annot->ap)
pdf_drop_xobject(ctx, annot->ap);
pdf_drop_obj(annot->obj);
fz_free(ctx, annot);
annot = next;
}
}
static void
pdf_transform_annot(pdf_annot *annot)
{
fz_rect bbox = annot->ap->bbox;
fz_rect rect = annot->rect;
float w, h, x, y;
fz_transform_rect(&bbox, &annot->ap->matrix);
if (bbox.x1 == bbox.x0)
w = 0;
else
w = (rect.x1 - rect.x0) / (bbox.x1 - bbox.x0);
if (bbox.y1 == bbox.y0)
h = 0;
else
h = (rect.y1 - rect.y0) / (bbox.y1 - bbox.y0);
x = rect.x0 - bbox.x0;
y = rect.y0 - bbox.y0;
fz_pre_scale(fz_translate(&annot->matrix, x, y), w, h);
}
fz_annot_type pdf_annot_obj_type(pdf_obj *obj)
{
char *subtype = pdf_to_name(pdf_dict_gets(obj, "Subtype"));
if (!strcmp(subtype, "Text"))
return FZ_ANNOT_TEXT;
else if (!strcmp(subtype, "Link"))
return FZ_ANNOT_LINK;
else if (!strcmp(subtype, "FreeText"))
return FZ_ANNOT_FREETEXT;
else if (!strcmp(subtype, "Line"))
return FZ_ANNOT_LINE;
else if (!strcmp(subtype, "Square"))
return FZ_ANNOT_SQUARE;
else if (!strcmp(subtype, "Circle"))
return FZ_ANNOT_CIRCLE;
else if (!strcmp(subtype, "Polygon"))
return FZ_ANNOT_POLYGON;
else if (!strcmp(subtype, "PolyLine"))
return FZ_ANNOT_POLYLINE;
else if (!strcmp(subtype, "Highlight"))
return FZ_ANNOT_HIGHLIGHT;
else if (!strcmp(subtype, "Underline"))
return FZ_ANNOT_UNDERLINE;
else if (!strcmp(subtype, "Squiggly"))
return FZ_ANNOT_SQUIGGLY;
else if (!strcmp(subtype, "StrikeOut"))
return FZ_ANNOT_STRIKEOUT;
else if (!strcmp(subtype, "Stamp"))
return FZ_ANNOT_STAMP;
else if (!strcmp(subtype, "Caret"))
return FZ_ANNOT_CARET;
else if (!strcmp(subtype, "Ink"))
return FZ_ANNOT_INK;
else if (!strcmp(subtype, "Popup"))
return FZ_ANNOT_POPUP;
else if (!strcmp(subtype, "FileAttachment"))
return FZ_ANNOT_FILEATTACHMENT;
else if (!strcmp(subtype, "Sound"))
return FZ_ANNOT_SOUND;
else if (!strcmp(subtype, "Movie"))
return FZ_ANNOT_MOVIE;
else if (!strcmp(subtype, "Widget"))
return FZ_ANNOT_WIDGET;
else if (!strcmp(subtype, "Screen"))
return FZ_ANNOT_SCREEN;
else if (!strcmp(subtype, "PrinterMark"))
return FZ_ANNOT_PRINTERMARK;
else if (!strcmp(subtype, "TrapNet"))
return FZ_ANNOT_TRAPNET;
else if (!strcmp(subtype, "Watermark"))
return FZ_ANNOT_WATERMARK;
else if (!strcmp(subtype, "3D"))
return FZ_ANNOT_3D;
else
return -1;
}
static const char *annot_type_str(fz_annot_type type)
{
switch (type)
{
case FZ_ANNOT_TEXT: return "Text";
case FZ_ANNOT_LINK: return "Link";
case FZ_ANNOT_FREETEXT: return "FreeText";
case FZ_ANNOT_LINE: return "Line";
case FZ_ANNOT_SQUARE: return "Square";
case FZ_ANNOT_CIRCLE: return "Circle";
case FZ_ANNOT_POLYGON: return "Polygon";
case FZ_ANNOT_POLYLINE: return "PolyLine";
case FZ_ANNOT_HIGHLIGHT: return "Highlight";
case FZ_ANNOT_UNDERLINE: return "Underline";
case FZ_ANNOT_SQUIGGLY: return "Squiggly";
case FZ_ANNOT_STRIKEOUT: return "StrikeOut";
case FZ_ANNOT_STAMP: return "Stamp";
case FZ_ANNOT_CARET: return "Caret";
case FZ_ANNOT_INK: return "Ink";
case FZ_ANNOT_POPUP: return "Popup";
case FZ_ANNOT_FILEATTACHMENT: return "FileAttachment";
case FZ_ANNOT_SOUND: return "Sound";
case FZ_ANNOT_MOVIE: return "Movie";
case FZ_ANNOT_WIDGET: return "Widget";
case FZ_ANNOT_SCREEN: return "Screen";
case FZ_ANNOT_PRINTERMARK: return "PrinterMark";
case FZ_ANNOT_TRAPNET: return "TrapNet";
case FZ_ANNOT_WATERMARK: return "Watermark";
case FZ_ANNOT_3D: return "3D";
default: return "";
}
}
pdf_annot *
pdf_load_annots(pdf_document *doc, pdf_obj *annots, pdf_page *page)
{
pdf_annot *annot, *head, *tail, **itr;
pdf_obj *obj, *ap, *as, *n, *rect;
int i, len, is_dict;
fz_context *ctx = doc->ctx;
fz_var(annot);
fz_var(itr);
head = tail = NULL;
len = pdf_array_len(annots);
/*
Create an initial linked list of pdf_annot structures with only the obj field
filled in. We do this because update_appearance has the potential to change
the annot array, so we don't want to be iterating through the array while
that happens.
*/
for (i = 0; i < len; i++)
{
obj = pdf_array_get(annots, i);
annot = fz_malloc_struct(ctx, pdf_annot);
annot->obj = pdf_keep_obj(obj);
annot->page = page;
annot->next = NULL;
if (!head)
head = tail = annot;
else
{
tail->next = annot;
tail = annot;
}
}
/*
Iterate through the newly created annot linked list, using a double pointer to
facilitate deleting broken annotations.
*/
itr = &head;
while (*itr)
{
annot = *itr;
fz_try(ctx)
{
pdf_hotspot *hp = &doc->hotspot;
n = NULL;
if (doc->update_appearance)
doc->update_appearance(doc, annot);
obj = annot->obj;
rect = pdf_dict_gets(obj, "Rect");
ap = pdf_dict_gets(obj, "AP");
as = pdf_dict_gets(obj, "AS");
is_dict = pdf_is_dict(ap);
if (!is_dict)
fz_throw(ctx, FZ_ERROR_GENERIC, "Annotation object not a dictionary");
if (hp->num == pdf_to_num(obj)
&& hp->gen == pdf_to_gen(obj)
&& (hp->state & HOTSPOT_POINTER_DOWN))
{
n = pdf_dict_gets(ap, "D"); /* down state */
}
if (n == NULL)
n = pdf_dict_gets(ap, "N"); /* normal state */
/* lookup current state in sub-dictionary */
if (!pdf_is_stream(doc, pdf_to_num(n), pdf_to_gen(n)))
n = pdf_dict_get(n, as);
pdf_to_rect(ctx, rect, &annot->rect);
annot->pagerect = annot->rect;
fz_transform_rect(&annot->pagerect, &page->ctm);
annot->ap = NULL;
annot->annot_type = pdf_annot_obj_type(obj);
annot->widget_type = annot->annot_type == FZ_ANNOT_WIDGET ? pdf_field_type(doc, obj) : PDF_WIDGET_TYPE_NOT_WIDGET;
if (pdf_is_stream(doc, pdf_to_num(n), pdf_to_gen(n)))
{
annot->ap = pdf_load_xobject(doc, n);
pdf_transform_annot(annot);
annot->ap_iteration = annot->ap->iteration;
}
if (obj == doc->focus_obj)
doc->focus = annot;
/* Move to next item in the linked list */
itr = &annot->next;
}
fz_catch(ctx)
{
/* Move to next item in the linked list, dropping this one */
*itr = annot->next;
annot->next = NULL; /* Required because pdf_free_annot follows the "next" chain */
pdf_free_annot(ctx, annot);
fz_warn(ctx, "ignoring broken annotation");
/* FIXME: TryLater */
}
}
return head;
}
void
pdf_update_annot(pdf_document *doc, pdf_annot *annot)
{
pdf_obj *obj, *ap, *as, *n;
fz_context *ctx = doc->ctx;
if (doc->update_appearance)
doc->update_appearance(doc, annot);
obj = annot->obj;
ap = pdf_dict_gets(obj, "AP");
as = pdf_dict_gets(obj, "AS");
if (pdf_is_dict(ap))
{
pdf_hotspot *hp = &doc->hotspot;
n = NULL;
if (hp->num == pdf_to_num(obj)
&& hp->gen == pdf_to_gen(obj)
&& (hp->state & HOTSPOT_POINTER_DOWN))
{
n = pdf_dict_gets(ap, "D"); /* down state */
}
if (n == NULL)
n = pdf_dict_gets(ap, "N"); /* normal state */
/* lookup current state in sub-dictionary */
if (!pdf_is_stream(doc, pdf_to_num(n), pdf_to_gen(n)))
n = pdf_dict_get(n, as);
pdf_drop_xobject(ctx, annot->ap);
annot->ap = NULL;
if (pdf_is_stream(doc, pdf_to_num(n), pdf_to_gen(n)))
{
fz_try(ctx)
{
annot->ap = pdf_load_xobject(doc, n);
pdf_transform_annot(annot);
annot->ap_iteration = annot->ap->iteration;
}
fz_catch(ctx)
{
fz_warn(ctx, "ignoring broken annotation");
/* FIXME: TryLater */
}
}
}
}
pdf_annot *
pdf_first_annot(pdf_document *doc, pdf_page *page)
{
return page ? page->annots : NULL;
}
pdf_annot *
pdf_next_annot(pdf_document *doc, pdf_annot *annot)
{
return annot ? annot->next : NULL;
}
fz_rect *
pdf_bound_annot(pdf_document *doc, pdf_annot *annot, fz_rect *rect)
{
if (rect == NULL)
return NULL;
if (annot)
*rect = annot->pagerect;
else
*rect = fz_empty_rect;
return rect;
}
fz_annot_type
pdf_annot_type(pdf_annot *annot)
{
return annot->annot_type;
}
pdf_annot *
pdf_create_annot(pdf_document *doc, pdf_page *page, fz_annot_type type)
{
fz_context *ctx = doc->ctx;
pdf_annot *annot = NULL;
pdf_obj *annot_obj = pdf_new_dict(doc, 0);
pdf_obj *ind_obj = NULL;
fz_var(annot);
fz_var(ind_obj);
fz_try(ctx)
{
int ind_obj_num;
fz_rect rect = {0.0, 0.0, 0.0, 0.0};
const char *type_str = annot_type_str(type);
pdf_obj *annot_arr = pdf_dict_gets(page->me, "Annots");
if (annot_arr == NULL)
{
annot_arr = pdf_new_array(doc, 0);
pdf_dict_puts_drop(page->me, "Annots", annot_arr);
}
pdf_dict_puts_drop(annot_obj, "Type", pdf_new_name(doc, "Annot"));
pdf_dict_puts_drop(annot_obj, "Subtype", pdf_new_name(doc, type_str));
pdf_dict_puts_drop(annot_obj, "Rect", pdf_new_rect(doc, &rect));
annot = fz_malloc_struct(ctx, pdf_annot);
annot->page = page;
annot->obj = pdf_keep_obj(annot_obj);
annot->rect = rect;
annot->pagerect = rect;
annot->ap = NULL;
annot->widget_type = PDF_WIDGET_TYPE_NOT_WIDGET;
annot->annot_type = type;
/*
Both annotation object and annotation structure are now created.
Insert the object in the hierarchy and the structure in the
page's array.
*/
ind_obj_num = pdf_create_object(doc);
pdf_update_object(doc, ind_obj_num, annot_obj);
ind_obj = pdf_new_indirect(doc, ind_obj_num, 0);
pdf_array_push(annot_arr, ind_obj);
/*
Linking must be done after any call that might throw because
pdf_free_annot below actually frees a list
*/
annot->next = page->annots;
page->annots = annot;
doc->dirty = 1;
}
fz_always(ctx)
{
pdf_drop_obj(annot_obj);
pdf_drop_obj(ind_obj);
}
fz_catch(ctx)
{
pdf_free_annot(ctx, annot);
fz_rethrow(ctx);
}
return annot;
}
void
pdf_delete_annot(pdf_document *doc, pdf_page *page, pdf_annot *annot)
{
fz_context *ctx = doc->ctx;
pdf_annot **annotptr;
pdf_obj *old_annot_arr;
pdf_obj *annot_arr;
if (annot == NULL)
return;
/* Remove annot from page's list */
for (annotptr = &page->annots; *annotptr; annotptr = &(*annotptr)->next)
{
if (*annotptr == annot)
break;
}
/* Check the passed annotation was of this page */
if (*annotptr == NULL)
return;
*annotptr = annot->next;
/* Stick it in the deleted list */
annot->next = page->deleted_annots;
page->deleted_annots = annot;
pdf_drop_xobject(ctx, annot->ap);
annot->ap = NULL;
/* Recreate the "Annots" array with this annot removed */
old_annot_arr = pdf_dict_gets(page->me, "Annots");
if (old_annot_arr)
{
int i, n = pdf_array_len(old_annot_arr);
annot_arr = pdf_new_array(doc, n?(n-1):0);
fz_try(ctx)
{
for (i = 0; i < n; i++)
{
pdf_obj *obj = pdf_array_get(old_annot_arr, i);
if (obj != annot->obj)
pdf_array_push(annot_arr, obj);
}
/*
Overwrite "Annots" in the page dictionary, which has the
side-effect of releasing the last reference to old_annot_arr
*/
pdf_dict_puts(page->me, "Annots", annot_arr);
}
fz_always(ctx)
{
pdf_drop_obj(annot_arr);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
pdf_drop_obj(annot->obj);
annot->obj = NULL;
doc->dirty = 1;
}
static fz_colorspace *pdf_to_color(pdf_document *doc, pdf_obj *col, float color[4])
{
fz_colorspace *cs;
int i, ncol = pdf_array_len(col);
switch (ncol)
{
case 1: cs = fz_device_gray(doc->ctx); break;
case 3: cs = fz_device_rgb(doc->ctx); break;
case 4: cs = fz_device_cmyk(doc->ctx); break;
default: return NULL;
}
for (i = 0; i < ncol; i++)
color[i] = pdf_to_real(pdf_array_get(col, i));
return cs;
}
static fz_point *
quadpoints(pdf_document *doc, pdf_obj *annot, int *nout)
{
fz_context *ctx = doc->ctx;
pdf_obj *quad = pdf_dict_gets(annot, "QuadPoints");
fz_point *qp = NULL;
int i, n;
if (!quad)
return NULL;
n = pdf_array_len(quad);
if (n%8 != 0)
return NULL;
fz_var(qp);
fz_try(ctx)
{
qp = fz_malloc_array(ctx, n/2, sizeof(fz_point));
for (i = 0; i < n; i += 2)
{
qp[i/2].x = pdf_to_real(pdf_array_get(quad, i));
qp[i/2].y = pdf_to_real(pdf_array_get(quad, i+1));
}
}
fz_catch(ctx)
{
fz_free(ctx, qp);
fz_rethrow(ctx);
}
*nout = n/2;
return qp;
}
void
pdf_set_markup_annot_quadpoints(pdf_document *doc, pdf_annot *annot, fz_point *qp, int n)
{
fz_context *ctx = doc->ctx;
fz_matrix ctm;
pdf_obj *arr = pdf_new_array(doc, n*2);
int i;
fz_invert_matrix(&ctm, &annot->page->ctm);
pdf_dict_puts_drop(annot->obj, "QuadPoints", arr);
for (i = 0; i < n; i++)
{
fz_point pt = qp[i];
pdf_obj *r;
fz_transform_point(&pt, &ctm);
r = pdf_new_real(doc, pt.x);
pdf_array_push_drop(arr, r);
r = pdf_new_real(doc, pt.y);
pdf_array_push_drop(arr, r);
}
}
static void update_rect(fz_context *ctx, pdf_annot *annot)
{
pdf_to_rect(ctx, pdf_dict_gets(annot->obj, "Rect"), &annot->rect);
annot->pagerect = annot->rect;
fz_transform_rect(&annot->pagerect, &annot->page->ctm);
}
void
pdf_set_ink_annot_list(pdf_document *doc, pdf_annot *annot, fz_point *pts, int *counts, int ncount, float color[3], float thickness)
{
fz_context *ctx = doc->ctx;
fz_matrix ctm;
pdf_obj *list = pdf_new_array(doc, ncount);
pdf_obj *bs, *col;
fz_rect rect;
int i, k = 0;
fz_invert_matrix(&ctm, &annot->page->ctm);
pdf_dict_puts_drop(annot->obj, "InkList", list);
for (i = 0; i < ncount; i++)
{
int j;
pdf_obj *arc = pdf_new_array(doc, counts[i]);
pdf_array_push_drop(list, arc);
for (j = 0; j < counts[i]; j++)
{
fz_point pt = pts[k];
fz_transform_point(&pt, &ctm);
if (i == 0 && j == 0)
{
rect.x0 = rect.x1 = pt.x;
rect.y0 = rect.y1 = pt.y;
}
else
{
fz_include_point_in_rect(&rect, &pt);
}
pdf_array_push_drop(arc, pdf_new_real(doc, pt.x));
pdf_array_push_drop(arc, pdf_new_real(doc, pt.y));
k++;
}
}
fz_expand_rect(&rect, thickness);
pdf_dict_puts_drop(annot->obj, "Rect", pdf_new_rect(doc, &rect));
update_rect(ctx, annot);
bs = pdf_new_dict(doc, 1);
pdf_dict_puts_drop(annot->obj, "BS", bs);
pdf_dict_puts_drop(bs, "W", pdf_new_real(doc, thickness));
col = pdf_new_array(doc, 3);
pdf_dict_puts_drop(annot->obj, "C", col);
for (i = 0; i < 3; i++)
pdf_array_push_drop(col, pdf_new_real(doc, color[i]));
}
void
pdf_set_annot_appearance(pdf_document *doc, pdf_annot *annot, fz_rect *rect, fz_display_list *disp_list)
{
fz_context *ctx = doc->ctx;
pdf_obj *obj = annot->obj;
const fz_matrix *page_ctm = &annot->page->ctm;
fz_matrix ctm;
fz_matrix mat = fz_identity;
fz_device *dev = NULL;
pdf_xobject *xobj = NULL;
fz_invert_matrix(&ctm, page_ctm);
fz_var(dev);
fz_try(ctx)
{
pdf_obj *ap_obj;
fz_rect trect = *rect;
fz_transform_rect(&trect, &ctm);
pdf_dict_puts_drop(obj, "Rect", pdf_new_rect(doc, &trect));
/* See if there is a current normal appearance */
ap_obj = pdf_dict_getp(obj, "AP/N");
if (!pdf_is_stream(doc, pdf_to_num(obj), pdf_to_gen(obj)))
ap_obj = NULL;
if (ap_obj == NULL)
{
ap_obj = pdf_new_xobject(doc, &trect, &mat);
pdf_dict_putp_drop(obj, "AP/N", ap_obj);
}
else
{
pdf_dict_puts_drop(ap_obj, "Rect", pdf_new_rect(doc, &trect));
pdf_dict_puts_drop(ap_obj, "Matrix", pdf_new_matrix(doc, &mat));
}
dev = pdf_new_pdf_device(doc, ap_obj, pdf_dict_gets(ap_obj, "Resources"), &mat);
fz_run_display_list(disp_list, dev, &ctm, &fz_infinite_rect, NULL);
fz_free_device(dev);
/* Mark the appearance as changed - required for partial update */
xobj = pdf_load_xobject(doc, ap_obj);
if (xobj)
{
xobj->iteration++;
pdf_drop_xobject(ctx, xobj);
}
doc->dirty = 1;
update_rect(ctx, annot);
}
fz_catch(ctx)
{
fz_free_device(dev);
fz_rethrow(ctx);
}
}
void
pdf_set_markup_appearance(pdf_document *doc, pdf_annot *annot, float color[3], float alpha, float line_thickness, float line_height)
{
fz_context *ctx = doc->ctx;
const fz_matrix *page_ctm = &annot->page->ctm;
fz_path *path = NULL;
fz_stroke_state *stroke = NULL;
fz_device *dev = NULL;
fz_display_list *strike_list = NULL;
int i, n;
fz_point *qp = quadpoints(doc, annot->obj, &n);
if (!qp || n <= 0)
return;
fz_var(path);
fz_var(stroke);
fz_var(dev);
fz_var(strike_list);
fz_try(ctx)
{
fz_rect rect = fz_empty_rect;
rect.x0 = rect.x1 = qp[0].x;
rect.y0 = rect.y1 = qp[0].y;
for (i = 0; i < n; i++)
fz_include_point_in_rect(&rect, &qp[i]);
strike_list = fz_new_display_list(ctx);
dev = fz_new_list_device(ctx, strike_list);
for (i = 0; i < n; i += 4)
{
fz_point pt0 = qp[i];
fz_point pt1 = qp[i+1];
fz_point up;
float thickness;
up.x = qp[i+2].x - qp[i+1].x;
up.y = qp[i+2].y - qp[i+1].y;
pt0.x += line_height * up.x;
pt0.y += line_height * up.y;
pt1.x += line_height * up.x;
pt1.y += line_height * up.y;
thickness = sqrtf(up.x * up.x + up.y * up.y) * line_thickness;
if (!stroke || fz_abs(stroke->linewidth - thickness) < SMALL_FLOAT)
{
if (stroke)
{
// assert(path)
fz_stroke_path(dev, path, stroke, page_ctm, fz_device_rgb(ctx), color, alpha);
fz_drop_stroke_state(ctx, stroke);
stroke = NULL;
fz_free_path(ctx, path);
path = NULL;
}
stroke = fz_new_stroke_state(ctx);
stroke->linewidth = thickness;
path = fz_new_path(ctx);
}
fz_moveto(ctx, path, pt0.x, pt0.y);
fz_lineto(ctx, path, pt1.x, pt1.y);
}
if (stroke)
{
fz_stroke_path(dev, path, stroke, page_ctm, fz_device_rgb(ctx), color, alpha);
}
fz_transform_rect(&rect, page_ctm);
pdf_set_annot_appearance(doc, annot, &rect, strike_list);
}
fz_always(ctx)
{
fz_free(ctx, qp);
fz_free_device(dev);
fz_drop_stroke_state(ctx, stroke);
fz_free_path(ctx, path);
fz_drop_display_list(ctx, strike_list);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
void
pdf_set_ink_appearance(pdf_document *doc, pdf_annot *annot)
{
fz_context *ctx = doc->ctx;
const fz_matrix *page_ctm = &annot->page->ctm;
fz_path *path = NULL;
fz_stroke_state *stroke = NULL;
fz_device *dev = NULL;
fz_display_list *strike_list = NULL;
fz_var(path);
fz_var(stroke);
fz_var(dev);
fz_var(strike_list);
fz_try(ctx)
{
fz_rect rect = fz_empty_rect;
fz_colorspace *cs;
float color[4];
float width;
pdf_obj *list;
int n, m, i, j;
cs = pdf_to_color(doc, pdf_dict_gets(annot->obj, "C"), color);
if (!cs)
{
cs = fz_device_rgb(ctx);
color[0] = 1.0f;
color[1] = 0.0f;
color[2] = 0.0f;
}
width = pdf_to_real(pdf_dict_gets(pdf_dict_gets(annot->obj, "BS"), "W"));
if (width == 0.0f)
width = 1.0f;
list = pdf_dict_gets(annot->obj, "InkList");
n = pdf_array_len(list);
strike_list = fz_new_display_list(ctx);
dev = fz_new_list_device(ctx, strike_list);
path = fz_new_path(ctx);
stroke = fz_new_stroke_state(ctx);
stroke->linewidth = width;
for (i = 0; i < n; i ++)
{
fz_point pt_last;
pdf_obj *arc = pdf_array_get(list, i);
m = pdf_array_len(arc);
for (j = 0; j < m-1; j += 2)
{
fz_point pt;
pt.x = pdf_to_real(pdf_array_get(arc, j));
pt.y = pdf_to_real(pdf_array_get(arc, j+1));
if (i == 0 && j == 0)
{
rect.x0 = rect.x1 = pt.x;
rect.y0 = rect.y1 = pt.y;
}
else
{
fz_include_point_in_rect(&rect, &pt);
}
if (j == 0)
fz_moveto(ctx, path, pt.x, pt.y);
else
fz_curvetov(ctx, path, pt_last.x, pt_last.y, (pt.x + pt_last.x) / 2, (pt.y + pt_last.y) / 2);
pt_last = pt;
}
fz_lineto(ctx, path, pt_last.x, pt_last.y);
}
fz_stroke_path(dev, path, stroke, page_ctm, cs, color, 1.0f);
fz_expand_rect(&rect, width);
fz_transform_rect(&rect, page_ctm);
pdf_set_annot_appearance(doc, annot, &rect, strike_list);
}
fz_always(ctx)
{
fz_free_device(dev);
fz_drop_stroke_state(ctx, stroke);
fz_free_path(ctx, path);
fz_drop_display_list(ctx, strike_list);
}
fz_catch(ctx)
{
fz_rethrow(ctx);
}
}
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