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#include "mupdf/pdf.h"
pdf_xobject *
pdf_keep_xobject(fz_context *ctx, pdf_xobject *xobj)
{
return fz_keep_storable(ctx, &xobj->storable);
}
void
pdf_drop_xobject(fz_context *ctx, pdf_xobject *xobj)
{
fz_drop_storable(ctx, &xobj->storable);
}
static void
pdf_drop_xobject_imp(fz_context *ctx, fz_storable *xobj_)
{
pdf_xobject *xobj = (pdf_xobject *)xobj_;
pdf_drop_obj(ctx, xobj->obj);
fz_free(ctx, xobj);
}
static size_t
pdf_xobject_size(pdf_xobject *xobj)
{
if (xobj == NULL)
return 0;
return sizeof(*xobj);
}
pdf_obj *
pdf_xobject_resources(fz_context *ctx, pdf_xobject *xobj)
{
return pdf_dict_get(ctx, xobj->obj, PDF_NAME_Resources);
}
fz_rect *
pdf_xobject_bbox(fz_context *ctx, pdf_xobject *xobj, fz_rect *bbox)
{
return pdf_to_rect(ctx, pdf_dict_get(ctx, xobj->obj, PDF_NAME_BBox), bbox);
}
fz_matrix *
pdf_xobject_matrix(fz_context *ctx, pdf_xobject *xobj, fz_matrix *matrix)
{
return pdf_to_matrix(ctx, pdf_dict_get(ctx, xobj->obj, PDF_NAME_Matrix), matrix);
}
int pdf_xobject_isolated(fz_context *ctx, pdf_xobject *xobj)
{
pdf_obj *group = pdf_dict_get(ctx, xobj->obj, PDF_NAME_Group);
if (group)
return pdf_to_bool(ctx, pdf_dict_get(ctx, group, PDF_NAME_I));
return 0;
}
int pdf_xobject_knockout(fz_context *ctx, pdf_xobject *xobj)
{
pdf_obj *group = pdf_dict_get(ctx, xobj->obj, PDF_NAME_Group);
if (group)
return pdf_to_bool(ctx, pdf_dict_get(ctx, group, PDF_NAME_K));
return 0;
}
int pdf_xobject_transparency(fz_context *ctx, pdf_xobject *xobj)
{
pdf_obj *group = pdf_dict_get(ctx, xobj->obj, PDF_NAME_Group);
if (group)
if (pdf_name_eq(ctx, pdf_dict_get(ctx, group, PDF_NAME_S), PDF_NAME_Transparency))
return 1;
return 0;
}
fz_colorspace *
pdf_xobject_colorspace(fz_context *ctx, pdf_xobject *xobj)
{
pdf_obj *group = pdf_dict_get(ctx, xobj->obj, PDF_NAME_Group);
if (group)
{
pdf_obj *cs = pdf_dict_get(ctx, group, PDF_NAME_CS);
if (cs)
{
fz_colorspace *colorspace = NULL;
fz_try(ctx)
colorspace = pdf_load_colorspace(ctx, pdf_get_bound_document(ctx, xobj->obj), cs);
fz_catch(ctx)
fz_warn(ctx, "cannot load xobject colorspace");
return colorspace;
}
}
return NULL;
}
pdf_xobject *
pdf_load_xobject(fz_context *ctx, pdf_document *doc, pdf_obj *dict)
{
pdf_xobject *form;
if ((form = pdf_find_item(ctx, pdf_drop_xobject_imp, dict)) != NULL)
return form;
form = fz_malloc_struct(ctx, pdf_xobject);
FZ_INIT_STORABLE(form, 1, pdf_drop_xobject_imp);
form->obj = NULL;
form->iteration = 0;
/* Store item immediately, to avoid possible recursion if objects refer back to this one */
pdf_store_item(ctx, dict, form, pdf_xobject_size(form));
form->obj = pdf_keep_obj(ctx, dict);
return form;
}
pdf_obj *
pdf_new_xobject(fz_context *ctx, pdf_document *doc, const fz_rect *bbox, const fz_matrix *mat)
{
int idict_num;
pdf_obj *idict = NULL;
pdf_obj *dict = NULL;
pdf_xobject *form = NULL;
pdf_obj *res = NULL;
pdf_obj *procset;
fz_var(idict);
fz_var(dict);
fz_var(form);
fz_var(res);
fz_try(ctx)
{
dict = pdf_new_dict(ctx, doc, 0);
pdf_dict_put_drop(ctx, dict, PDF_NAME_BBox, pdf_new_rect(ctx, doc, bbox));
pdf_dict_put_drop(ctx, dict, PDF_NAME_FormType, pdf_new_int(ctx, doc, 1));
pdf_dict_put_drop(ctx, dict, PDF_NAME_Length, pdf_new_int(ctx, doc, 0));
pdf_dict_put_drop(ctx, dict, PDF_NAME_Matrix, pdf_new_matrix(ctx, doc, mat));
res = pdf_new_dict(ctx, doc, 0);
pdf_dict_put(ctx, dict, PDF_NAME_Resources, res);
procset = pdf_new_array(ctx, doc, 2);
pdf_dict_put_drop(ctx, res, PDF_NAME_ProcSet, procset);
pdf_array_push(ctx, procset, PDF_NAME_PDF);
pdf_array_push(ctx, procset, PDF_NAME_Text);
pdf_dict_put(ctx, dict, PDF_NAME_Subtype, PDF_NAME_Form);
pdf_dict_put(ctx, dict, PDF_NAME_Type, PDF_NAME_XObject);
form = fz_malloc_struct(ctx, pdf_xobject);
FZ_INIT_STORABLE(form, 1, pdf_drop_xobject_imp);
form->obj = NULL;
form->iteration = 0;
idict_num = pdf_create_object(ctx, doc);
pdf_update_object(ctx, doc, idict_num, dict);
idict = pdf_new_indirect(ctx, doc, idict_num, 0);
pdf_drop_obj(ctx, dict);
dict = NULL;
pdf_store_item(ctx, idict, form, pdf_xobject_size(form));
form->obj = pdf_keep_obj(ctx, idict);
pdf_drop_xobject(ctx, form);
form = NULL;
}
fz_catch(ctx)
{
pdf_drop_obj(ctx, res);
pdf_drop_obj(ctx, dict);
pdf_drop_obj(ctx, idict);
pdf_drop_xobject(ctx, form);
fz_rethrow(ctx);
}
return idict;
}
void pdf_update_xobject_contents(fz_context *ctx, pdf_document *doc, pdf_xobject *form, fz_buffer *buffer)
{
pdf_update_stream(ctx, doc, form->obj, buffer, 0);
form->iteration ++;
}
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