static void pdfapp_loadpage_pdf(pdfapp_t *app)
{
pdf_page *page;
fz_error error;
fz_device *mdev;
error = pdf_load_page(&page, app->xref, app->pageno - 1);
if (error)
pdfapp_error(app, error);
app->page_bbox = page->mediabox;
app->page_rotate = page->rotate;
app->page_links = page->links;
page->links = NULL;
/* Create display list */
app->page_list = fz_new_display_list();
mdev = fz_new_list_device(app->page_list);
error = pdf_run_page(app->xref, page, mdev, fz_identity);
if (error)
{
error = fz_rethrow(error, "cannot draw page %d in '%s'", app->pageno, app->doctitle);
pdfapp_error(app, error);
}
fz_free_device(mdev);
pdf_free_page(page);
pdf_age_store(app->xref->store, 3);
}
pdf_page* j_mu_load_page(void* p_ctx, void* p_doc, int number)
{
fz_context* ctx = (fz_context*) p_ctx;
pdf_document* doc = (pdf_document*) p_doc;
pdf_page* page = pdf_load_page(ctx, doc, number);
return page;
}
int pdfsign_main(int argc, char **argv)
{
fz_context *ctx;
pdf_document *doc;
char *password = "";
int i, n, c;
pdf_page *page = NULL;
while ((c = fz_getopt(argc, argv, "p:")) != -1)
{
switch (c)
{
case 'p': password = fz_optarg; break;
default: usage(); break;
}
}
if (argc - fz_optind < 1)
usage();
filename = argv[fz_optind++];
ctx = fz_new_context(NULL, NULL, FZ_STORE_UNLIMITED);
if (!ctx)
{
fprintf(stderr, "cannot initialize context\n");
exit(1);
}
fz_var(page);
doc = pdf_open_document(ctx, filename);
fz_try(ctx)
{
if (pdf_needs_password(ctx, doc))
if (!pdf_authenticate_password(ctx, doc, password))
fz_warn(ctx, "cannot authenticate password: %s", filename);
n = pdf_count_pages(ctx, doc);
for (i = 0; i < n; ++i)
{
page = pdf_load_page(ctx, doc, i);
verify_page(ctx, doc, i, page);
fz_drop_page(ctx, (fz_page*)page);
page = NULL;
}
}
fz_always(ctx)
pdf_drop_document(ctx, doc);
fz_catch(ctx)
{
fz_drop_page(ctx, (fz_page*)page);
fprintf(stderr, "error verify signatures: %s\n", fz_caught_message(ctx));
}
fz_flush_warnings(ctx);
fz_drop_context(ctx);
return 0;
}
QImage Pdf::page(int i)
{
pdf_page* page = pdf_load_page(xref, i);
if (page == 0) {
printf("cannot load page %d\n", i);
return QImage();
}
static const float resolution = 300.0;
const float zoom = resolution / 72.0;
fz_matrix ctm = fz_translate(0, -page->mediabox.y1);
ctm = fz_concat(ctm, fz_scale(zoom, -zoom));
ctm = fz_concat(ctm, fz_rotate(page->rotate));
fz_bbox bbox = fz_round_rect(fz_transform_rect(ctm, page->mediabox));
fz_pixmap* pix = fz_new_pixmap_with_rect(ctx, fz_device_gray, bbox);
fz_clear_pixmap_with_color(pix, 255);
fz_device* dev = fz_new_draw_device(ctx, cache, pix);
pdf_run_page(xref, page, dev, ctm);
fz_free_device(dev);
int w = pix->w;
int h = pix->h;
QImage image(w, h, QImage::Format_MonoLSB);
QVector<QRgb> ct(2);
ct[0] = qRgb(255, 255, 255);
ct[1] = qRgb(0, 0, 0);
image.setColorTable(ct);
uchar* s = pix->samples;
int stride = image.bytesPerLine();
int bytes = w >> 3;
for (int line = 0; line < h; ++line) {
uchar* d = image.bits() + stride * line;
for (int col = 0; col < bytes; ++col) {
uchar data = 0;
for (int i = 0; i < 8; ++i) {
uchar v = *s++;
s++;
data >>= 1;
if (v < 128)
data |= 0x80;
}
*d++ = data;
}
}
fz_drop_pixmap(ctx, pix);
pdf_free_page(ctx, page);
return image;
}
QImage Document::RenderPage (int num, double xRes, double yRes)
{
auto page = WrapPage (pdf_load_page (MuDoc_, num), MuDoc_);
if (!page)
return QImage ();
#if MUPDF_VERSION < 0x0102
const auto& rect = pdf_bound_page (MuDoc_, page.get ());
#else
fz_rect rect;
pdf_bound_page (MuDoc_, page.get (), &rect);
#endif
auto px = fz_new_pixmap (MuCtx_, fz_device_bgr, xRes * (rect.x1 - rect.x0), yRes * (rect.y1 - rect.y0));
fz_clear_pixmap (MuCtx_, px);
auto dev = fz_new_draw_device (MuCtx_, px);
#if MUPDF_VERSION < 0x0102
pdf_run_page (MuDoc_, page.get (), dev, fz_scale (xRes, yRes), NULL);
#else
fz_matrix matrix;
pdf_run_page (MuDoc_, page.get (), dev, fz_scale (&matrix, xRes, yRes), NULL);
#endif
fz_free_device (dev);
const int pxWidth = fz_pixmap_width (MuCtx_, px);
const int pxHeight = fz_pixmap_height (MuCtx_, px);
auto samples = fz_pixmap_samples (MuCtx_, px);
QImage temp (samples, pxWidth, pxHeight, QImage::Format_ARGB32);
QImage img (QSize (pxWidth, pxHeight), QImage::Format_ARGB32);
for (int y = 0; y < pxHeight; ++y)
{
auto target = reinterpret_cast<QRgb*> (img.scanLine (y));
const auto source = reinterpret_cast<QRgb*> (temp.scanLine (y));
std::memcpy (target, source, sizeof (source [0]) * pxWidth);
}
fz_drop_pixmap (MuCtx_, px);
temp = QImage (QSize (pxWidth, pxHeight), QImage::Format_ARGB32);
QPainter p;
p.begin (&temp);
p.fillRect (QRect (QPoint (0, 0), temp.size ()), Qt::white);
p.drawImage (0, 0, img);
p.end ();
return temp;
}
QSize Document::GetPageSize (int num) const
{
auto page = WrapPage (pdf_load_page (MuDoc_, num), MuDoc_);
if (!page)
return QSize ();
#if MUPDF_VERSION < 0x0102
const auto& rect = pdf_bound_page (MuDoc_, page.get ());
#else
fz_rect rect;
pdf_bound_page (MuDoc_, page.get (), &rect);
#endif
return QSize (rect.x1 - rect.x0,
rect.y1 - rect.y0);
}
static pdf_page* _pdf_doc_get_page(struct _pdf_doc *self, int pageno)
{
if (self->pages[pageno])
return self->pages[pageno];
if (NULL == self->pages[pageno]) {
fz_error err = pdf_load_page(
&self->pages[pageno], self->xref, pageno);
if (err) {
mume_error(("pdf_load_page(%d): %d\n", pageno, err));
}
}
return self->pages[pageno];
}
JNIEXPORT void JNICALL
Java_com_artifex_mupdf_MuPDFCore_gotoPageInternal(JNIEnv *env, jobject thiz, int page)
{
float zoom;
fz_matrix ctm;
fz_bbox bbox;
fz_device *dev = NULL;
pdf_page *currentPage = NULL;
fz_var(dev);
fz_var(currentPage);
/* In the event of an error, ensure we give a non-empty page */
pageWidth = 100;
pageHeight = 100;
LOGE("Goto page %d...", page);
fz_try(ctx)
{
if (currentPageList != NULL)
{
fz_free_display_list(ctx, currentPageList);
currentPageList = NULL;
}
pagenum = page;
currentPage = pdf_load_page(xref, pagenum);
zoom = resolution / 72;
currentMediabox = pdf_bound_page(xref, currentPage);
ctm = fz_scale(zoom, zoom);
bbox = fz_round_rect(fz_transform_rect(ctm, currentMediabox));
pageWidth = bbox.x1-bbox.x0;
pageHeight = bbox.y1-bbox.y0;
/* Render to list */
currentPageList = fz_new_display_list(ctx);
dev = fz_new_list_device(ctx, currentPageList);
pdf_run_page(xref, currentPage, dev, fz_identity, NULL);
}
fz_catch(ctx)
{
LOGE("cannot make displaylist from page %d", pagenum);
}
pdf_free_page(ctx, currentPage);
currentPage = NULL;
fz_free_device(dev);
dev = NULL;
}
pdf_page *benchloadpage(fz_context *ctx, pdf_document *xref, int pagenum)
{
pdf_page *page = NULL;
mstimer timer;
timerstart(&timer);
fz_try(ctx) {
page = pdf_load_page(xref, pagenum - 1);
}
fz_catch(ctx) {
logbench("Error: failed to load page %d\n", pagenum);
return NULL;
}
timerstop(&timer);
logbench("pageload %3d: %.2f ms\n", pagenum, timeinms(&timer));
return page;
}
pdf_page* PDFDocument::PDFPageCache::Load(const int& page) {
std::unique_lock<std::mutex> lock(_mutex);
return pdf_load_page(_parent->_fz_context, _parent->_pdf_document, page);
}
static void decimatepages(fz_context *ctx, pdf_document *doc)
{
pdf_obj *oldroot, *root, *pages, *kids, *parent;
int num_pages = pdf_count_pages(ctx, doc);
int page, kidcount;
oldroot = pdf_dict_get(ctx, pdf_trailer(ctx, doc), PDF_NAME_Root);
pages = pdf_dict_get(ctx, oldroot, PDF_NAME_Pages);
root = pdf_new_dict(ctx, doc, 2);
pdf_dict_put(ctx, root, PDF_NAME_Type, pdf_dict_get(ctx, oldroot, PDF_NAME_Type));
pdf_dict_put(ctx, root, PDF_NAME_Pages, pdf_dict_get(ctx, oldroot, PDF_NAME_Pages));
pdf_update_object(ctx, doc, pdf_to_num(ctx, oldroot), root);
pdf_drop_obj(ctx, root);
/* Create a new kids array with our new pages in */
parent = pdf_new_indirect(ctx, doc, pdf_to_num(ctx, pages), pdf_to_gen(ctx, pages));
kids = pdf_new_array(ctx, doc, 1);
kidcount = 0;
for (page=0; page < num_pages; page++)
{
pdf_page *page_details = pdf_load_page(ctx, doc, page);
int xf = x_factor, yf = y_factor;
int x, y;
float w = page_details->mediabox.x1 - page_details->mediabox.x0;
float h = page_details->mediabox.y1 - page_details->mediabox.y0;
if (xf == 0 && yf == 0)
{
/* Nothing specified, so split along the long edge */
if (w > h)
xf = 2, yf = 1;
else
xf = 1, yf = 2;
}
else if (xf == 0)
xf = 1;
else if (yf == 0)
yf = 1;
for (y = yf-1; y >= 0; y--)
{
for (x = 0; x < xf; x++)
{
pdf_obj *newpageobj, *newpageref, *newmediabox;
fz_rect mb;
int num;
newpageobj = pdf_copy_dict(ctx, pdf_lookup_page_obj(ctx, doc, page));
num = pdf_create_object(ctx, doc);
pdf_update_object(ctx, doc, num, newpageobj);
newpageref = pdf_new_indirect(ctx, doc, num, 0);
newmediabox = pdf_new_array(ctx, doc, 4);
mb.x0 = page_details->mediabox.x0 + (w/xf)*x;
if (x == xf-1)
mb.x1 = page_details->mediabox.x1;
else
mb.x1 = page_details->mediabox.x0 + (w/xf)*(x+1);
mb.y0 = page_details->mediabox.y0 + (h/yf)*y;
if (y == yf-1)
mb.y1 = page_details->mediabox.y1;
else
mb.y1 = page_details->mediabox.y0 + (h/yf)*(y+1);
pdf_array_push(ctx, newmediabox, pdf_new_real(ctx, doc, mb.x0));
pdf_array_push(ctx, newmediabox, pdf_new_real(ctx, doc, mb.y0));
pdf_array_push(ctx, newmediabox, pdf_new_real(ctx, doc, mb.x1));
pdf_array_push(ctx, newmediabox, pdf_new_real(ctx, doc, mb.y1));
pdf_dict_put(ctx, newpageobj, PDF_NAME_Parent, parent);
pdf_dict_put(ctx, newpageobj, PDF_NAME_MediaBox, newmediabox);
/* Store page object in new kids array */
pdf_array_push(ctx, kids, newpageref);
kidcount++;
}
}
}
pdf_drop_obj(ctx, parent);
/* Update page count and kids array */
pdf_dict_put(ctx, pages, PDF_NAME_Count, pdf_new_int(ctx, doc, kidcount));
pdf_dict_put(ctx, pages, PDF_NAME_Kids, kids);
pdf_drop_obj(ctx, kids);
}
static void decimatepages(pdf_document *xref)
{
pdf_obj *oldroot, *root, *pages, *kids, *parent;
fz_context *ctx = xref->ctx;
int num_pages = pdf_count_pages(xref);
int page, kidcount;
/* Keep only pages/type and (reduced) dest entries to avoid
* references to unretained pages */
oldroot = pdf_dict_gets(pdf_trailer(xref), "Root");
pages = pdf_dict_gets(oldroot, "Pages");
root = pdf_new_dict(ctx, 2);
pdf_dict_puts(root, "Type", pdf_dict_gets(oldroot, "Type"));
pdf_dict_puts(root, "Pages", pdf_dict_gets(oldroot, "Pages"));
pdf_update_object(xref, pdf_to_num(oldroot), root);
pdf_drop_obj(root);
/* Create a new kids array with only the pages we want to keep */
parent = pdf_new_indirect(ctx, pdf_to_num(pages), pdf_to_gen(pages), xref);
kids = pdf_new_array(ctx, 1);
kidcount = 0;
for (page=0; page < num_pages; page++)
{
pdf_page *page_details = pdf_load_page(xref, page);
int xf = x_factor, yf = y_factor;
int x, y;
float w = page_details->mediabox.x1 - page_details->mediabox.x0;
float h = page_details->mediabox.y1 - page_details->mediabox.y0;
if (xf == 0 && yf == 0)
{
/* Nothing specified, so split along the long edge */
if (w > h)
xf = 2, yf = 1;
else
xf = 1, yf = 2;
}
else if (xf == 0)
xf = 1;
else if (yf == 0)
yf = 1;
for (y = yf-1; y >= 0; y--)
{
for (x = 0; x < xf; x++)
{
pdf_obj *newpageobj, *newpageref, *newmediabox;
fz_rect mb;
int num;
newpageobj = pdf_copy_dict(ctx, xref->page_objs[page]);
num = pdf_create_object(xref);
pdf_update_object(xref, num, newpageobj);
newpageref = pdf_new_indirect(ctx, num, 0, xref);
newmediabox = pdf_new_array(ctx, 4);
mb.x0 = page_details->mediabox.x0 + (w/xf)*x;
if (x == xf-1)
mb.x1 = page_details->mediabox.x1;
else
mb.x1 = page_details->mediabox.x0 + (w/xf)*(x+1);
mb.y0 = page_details->mediabox.y0 + (h/yf)*y;
if (y == yf-1)
mb.y1 = page_details->mediabox.y1;
else
mb.y1 = page_details->mediabox.y0 + (h/yf)*(y+1);
pdf_array_push(newmediabox, pdf_new_real(ctx, mb.x0));
pdf_array_push(newmediabox, pdf_new_real(ctx, mb.y0));
pdf_array_push(newmediabox, pdf_new_real(ctx, mb.x1));
pdf_array_push(newmediabox, pdf_new_real(ctx, mb.y1));
pdf_dict_puts(newpageobj, "Parent", parent);
pdf_dict_puts(newpageobj, "MediaBox", newmediabox);
/* Store page object in new kids array */
pdf_array_push(kids, newpageref);
kidcount++;
}
}
}
pdf_drop_obj(parent);
/* Update page count and kids array */
pdf_dict_puts(pages, "Count", pdf_new_int(ctx, kidcount));
pdf_dict_puts(pages, "Kids", kids);
pdf_drop_obj(kids);
}
std::string PDFDocument::GetPageText(int page, int line_sep) {
// 1. Init MuPDF structures.
pdf_page* page_struct = GetPage(page);
#if MUPDF_VERSION < 10012
fz_stext_sheet* text_sheet = fz_new_stext_sheet(_fz_context);
#endif
// 2. Render page.
#if MUPDF_VERSION >= 10012
fz_stext_options stext_options = {0};
// See #elif MUPDF_VERSION >= 10009 block below.
fz_stext_page* text_page = fz_new_stext_page_from_page(
_fz_context, &(page_struct->super), &stext_options);
#elif MUPDF_VERSION >= 10010
fz_stext_options stext_options = {0};
// See #elif MUPDF_VERSION >= 10009 block below.
fz_stext_page* text_page = fz_new_stext_page_from_page(
_fz_context, &(page_struct->super), text_sheet, &stext_options);
#elif MUPDF_VERSION >= 10009
// The function below is a wrapper around fz_run_page that uses a fresh
// device. We can't use pdf_run_page to gather the text for us.
// These notes are also left in here in case MuPDF's API changes again.
fz_stext_page* text_page = fz_new_stext_page_from_page(
_fz_context, &(page_struct->super), text_sheet);
#else
fz_stext_page* text_page = fz_new_text_page(_fz_context);
fz_device* dev = fz_new_stext_device(_fz_context, text_sheet, text_page);
// I've no idea what fz_{begin,end}_page do, but without them pdf_run_page
// segfaults :-/
fz_begin_page(_fz_context, dev, &fz_infinite_rect, &fz_identity);
pdf_run_page(
_fz_context, _pdf_document, page_struct, dev, &fz_identity, nullptr);
fz_end_page(_fz_context, dev);
#endif
// 3. Build text.
std::string r;
#if MUPDF_VERSION >= 10012
for (fz_stext_block* text_block = text_page->first_block;
text_block != nullptr; text_block = text_block->next) {
if (text_block->type != FZ_STEXT_BLOCK_TEXT) {
continue;
}
for (fz_stext_line* text_line = text_block->u.t.first_line;
text_line != nullptr; text_line = text_line->next) {
for (fz_stext_char* text_char = text_line->first_char;
text_char != nullptr; text_char = text_char->next) {
{
const int c = text_char->c;
#else
for (fz_page_block* page_block = text_page->blocks;
page_block < text_page->blocks + text_page->len; ++page_block) {
assert(page_block != nullptr);
if (page_block->type != FZ_PAGE_BLOCK_TEXT) {
continue;
}
fz_stext_block* const text_block = page_block->u.text;
assert(text_block != nullptr);
for (fz_stext_line* text_line = text_block->lines;
text_line < text_block->lines + text_block->len; ++text_line) {
assert(text_line != nullptr);
for (fz_stext_span* text_span = text_line->first_span;
text_span != nullptr; text_span = text_span->next) {
for (int i = 0; i < text_span->len; ++i) {
const int c = text_span->text[i].c;
#endif
// A single UTF-8 character cannot take more than 4 bytes, but let's
// go for 8.
char buffer[8];
const int num_bytes = fz_runetochar(buffer, c);
assert(num_bytes <= static_cast<int>(sizeof(buffer)));
buffer[num_bytes] = '\0';
r += buffer;
}
}
if (!isspace(r.back())) {
r += line_sep;
}
}
}
// 4. Clean up.
fz_drop_stext_page(_fz_context, text_page);
#if MUPDF_VERSION < 10012
fz_drop_stext_sheet(_fz_context, text_sheet);
#endif
return r;
}
PDFDocument::PDFOutlineItem::~PDFOutlineItem() {}
PDFDocument::PDFOutlineItem::PDFOutlineItem(fz_outline* src) {
if (src == nullptr) {
_dest_page = -1;
} else {
_title = src->title;
#if MUPDF_VERSION >= 10010
_dest_page = src->page;
#else
_dest_page = src->dest.ld.gotor.page;
#endif
}
}
int PDFDocument::PDFOutlineItem::GetDestPage() const { return _dest_page; }
PDFDocument::PDFOutlineItem* PDFDocument::PDFOutlineItem::Build(
fz_context* ctx, fz_outline* src) {
PDFOutlineItem* root = nullptr;
std::vector<std::unique_ptr<OutlineItem>> items;
BuildRecursive(src, &items);
fz_drop_outline(ctx, src);
if (items.empty()) {
return nullptr;
} else if (items.size() == 1) {
root = dynamic_cast<PDFOutlineItem*>(items[0].release());
} else {
root = new PDFOutlineItem(nullptr);
root->_title = DEFAULT_ROOT_OUTLINE_ITEM_TITLE;
root->_children.swap(items);
}
return root;
}
void PDFDocument::PDFOutlineItem::BuildRecursive(
fz_outline* src,
std::vector<std::unique_ptr<Document::OutlineItem>>* output) {
assert(output != nullptr);
for (fz_outline* i = src; i != nullptr; i = i->next) {
PDFOutlineItem* item = new PDFOutlineItem(i);
if (i->down != nullptr) {
BuildRecursive(i->down, &(item->_children));
}
output->push_back(std::unique_ptr<Document::OutlineItem>(item));
}
}
PDFDocument::PDFPageCache::PDFPageCache(int cache_size, PDFDocument* parent)
: Cache<int, pdf_page*>(cache_size), _parent(parent) {}
PDFDocument::PDFPageCache::~PDFPageCache() { Clear(); }
pdf_page* PDFDocument::PDFPageCache::Load(const int& page) {
std::unique_lock<std::mutex> lock(_mutex);
return pdf_load_page(_parent->_fz_context, _parent->_pdf_document, page);
}
void PDFDocument::PDFPageCache::Discard(
const int& page, pdf_page* const& page_struct) {
std::unique_lock<std::mutex> lock(_mutex);
pdf_drop_page(_parent->_fz_context, _parent->_pdf_document, page_struct);
}
