bool SkPDFDocument::emitPDF(SkWStream* stream) {
if (fPages.isEmpty()) {
return false;
}
for (int i = 0; i < fPages.count(); i++) {
if (fPages[i] == NULL) {
return false;
}
}
fFirstPageResources = SkNEW(SkTSet<SkPDFObject*>);
fOtherPageResources = SkNEW(SkTSet<SkPDFObject*>);
// We haven't emitted the document before if fPageTree is empty.
if (fPageTree.isEmpty()) {
SkPDFDict* pageTreeRoot;
SkPDFPage::GeneratePageTree(fPages, fCatalog.get(), &fPageTree,
&pageTreeRoot);
fDocCatalog->insert("Pages", new SkPDFObjRef(pageTreeRoot))->unref();
/* TODO(vandebo): output intent
SkAutoTUnref<SkPDFDict> outputIntent = new SkPDFDict("OutputIntent");
outputIntent->insert("S", new SkPDFName("GTS_PDFA1"))->unref();
outputIntent->insert("OutputConditionIdentifier",
new SkPDFString("sRGB"))->unref();
SkAutoTUnref<SkPDFArray> intentArray = new SkPDFArray;
intentArray->append(outputIntent.get());
fDocCatalog->insert("OutputIntent", intentArray.get());
*/
SkAutoTUnref<SkPDFDict> dests(SkNEW(SkPDFDict));
bool firstPage = true;
/* The references returned in newResources are transfered to
* fFirstPageResources or fOtherPageResources depending on firstPage and
* knownResources doesn't have a reference but just relies on the other
* two sets to maintain a reference.
*/
SkTSet<SkPDFObject*> knownResources;
// mergeInto returns the number of duplicates.
// If there are duplicates, there is a bug and we mess ref counting.
SkDEBUGCODE(int duplicates =) knownResources.mergeInto(*fFirstPageResources);
SkASSERT(duplicates == 0);
for (int i = 0; i < fPages.count(); i++) {
if (i == 1) {
firstPage = false;
SkDEBUGCODE(duplicates =) knownResources.mergeInto(*fOtherPageResources);
}
SkTSet<SkPDFObject*> newResources;
fPages[i]->finalizePage(
fCatalog.get(), firstPage, knownResources, &newResources);
addResourcesToCatalog(firstPage, &newResources, fCatalog.get());
if (firstPage) {
SkDEBUGCODE(duplicates =) fFirstPageResources->mergeInto(newResources);
} else {
//
// Client::Write
//
void Client::Write()
{
// Get the message text
const char *message = stream.str();
// Get the filename
const char *fileName = Utils::Strrchr(file, '\\') + 1;
// Get the time
U32 time = Clock::Time::Ms() - startTime;
/*
// Is this an warning or error ?
if (level == WARN || level == ERR)
{
// Compose buffer into exception information
U32 arguments[4];
arguments[0] = (U32) message;
arguments[1] = (U32) file;
arguments[2] = (U32) line;
arguments[3] = level == WARN ? 1 : 0;
RaiseException(1, level == ERR ? EXCEPTION_NONCONTINUABLE_EXCEPTION : 0, 4, arguments);
}
else
*/
{
// Write to the destinations
NList<Destination>::Iterator dests(&destinations);
for (!dests; dests.IsValid(); ++dests)
{
(*dests)->Write(level, name, fileName, line, time, message);
}
}
stream.freeze(0);
stream.seekp(0);
}
static bool emit_pdf_document(const SkTDArray<const SkPDFDevice*>& pageDevices,
SkWStream* stream) {
if (pageDevices.isEmpty()) {
return false;
}
SkTDArray<SkPDFDict*> pages;
SkAutoTUnref<SkPDFDict> dests(SkNEW(SkPDFDict));
for (int i = 0; i < pageDevices.count(); i++) {
SkASSERT(pageDevices[i]);
SkASSERT(i == 0 ||
pageDevices[i - 1]->getCanon() == pageDevices[i]->getCanon());
SkAutoTUnref<SkPDFDict> page(create_pdf_page(pageDevices[i]));
pageDevices[i]->appendDestinations(dests, page.get());
pages.push(page.detach());
}
SkTDArray<SkPDFDict*> pageTree;
SkAutoTUnref<SkPDFDict> docCatalog(SkNEW_ARGS(SkPDFDict, ("Catalog")));
SkPDFDict* pageTreeRoot;
generate_page_tree(pages, &pageTree, &pageTreeRoot);
docCatalog->insertObjRef("Pages", SkRef(pageTreeRoot));
if (dests->size() > 0) {
docCatalog->insertObjRef("Dests", dests.detach());
}
/* TODO(vandebo): output intent
SkAutoTUnref<SkPDFDict> outputIntent = new SkPDFDict("OutputIntent");
outputIntent->insertName("S", "GTS_PDFA1");
outputIntent->insertString("OutputConditionIdentifier", "sRGB");
SkAutoTUnref<SkPDFArray> intentArray(new SkPDFArray);
intentArray->appendObject(SkRef(outputIntent.get()));
docCatalog->insertObject("OutputIntent", intentArray.detach());
*/
// Build font subsetting info before proceeding.
SkPDFSubstituteMap substitutes;
perform_font_subsetting(pageDevices, &substitutes);
SkPDFObjNumMap objNumMap;
if (objNumMap.addObject(docCatalog.get())) {
docCatalog->addResources(&objNumMap, substitutes);
}
size_t baseOffset = stream->bytesWritten();
emit_pdf_header(stream);
SkTDArray<int32_t> offsets;
for (int i = 0; i < objNumMap.objects().count(); ++i) {
SkPDFObject* object = objNumMap.objects()[i];
size_t offset = stream->bytesWritten();
// This assert checks that size(pdf_header) > 0 and that
// the output stream correctly reports bytesWritten().
SkASSERT(offset > baseOffset);
offsets.push(SkToS32(offset - baseOffset));
SkASSERT(object == substitutes.getSubstitute(object));
SkASSERT(objNumMap.getObjectNumber(object) == i + 1);
stream->writeDecAsText(i + 1);
stream->writeText(" 0 obj\n"); // Generation number is always 0.
object->emitObject(stream, objNumMap, substitutes);
stream->writeText("\nendobj\n");
}
int32_t xRefFileOffset = SkToS32(stream->bytesWritten() - baseOffset);
// Include the zeroth object in the count.
int32_t objCount = SkToS32(offsets.count() + 1);
stream->writeText("xref\n0 ");
stream->writeDecAsText(objCount);
stream->writeText("\n0000000000 65535 f \n");
for (int i = 0; i < offsets.count(); i++) {
SkASSERT(offsets[i] > 0);
stream->writeBigDecAsText(offsets[i], 10);
stream->writeText(" 00000 n \n");
}
emit_pdf_footer(stream, objNumMap, substitutes, docCatalog.get(), objCount,
xRefFileOffset);
// The page tree has both child and parent pointers, so it creates a
// reference cycle. We must clear that cycle to properly reclaim memory.
for (int i = 0; i < pageTree.count(); i++) {
pageTree[i]->clear();
}
pageTree.safeUnrefAll();
pages.unrefAll();
return true;
}
