// static
SkPDFGraphicState* SkPDFGraphicState::GetSMaskGraphicState(
SkPDFFormXObject* sMask, bool invert) {
// The practical chances of using the same mask more than once are unlikely
// enough that it's not worth canonicalizing.
SkAutoMutexAcquire lock(CanonicalPaintsMutex());
SkRefPtr<SkPDFDict> sMaskDict = new SkPDFDict("Mask");
sMaskDict->unref(); // SkRefPtr and new both took a reference.
sMaskDict->insertName("S", "Alpha");
sMaskDict->insert("G", new SkPDFObjRef(sMask))->unref();
SkPDFGraphicState* result = new SkPDFGraphicState;
result->fPopulated = true;
result->fSMask = true;
result->insertName("Type", "ExtGState");
result->insert("SMask", sMaskDict.get());
result->fResources.push(sMask);
sMask->ref();
if (invert) {
SkPDFObject* invertFunction = GetInvertFunction();
result->fResources.push(invertFunction);
invertFunction->ref();
sMaskDict->insert("TR", new SkPDFObjRef(invertFunction))->unref();
}
return result;
}
// static
SkPDFObject* SkPDFShader::GetPDFShader(const SkShader& shader,
const SkMatrix& matrix,
const SkIRect& surfaceBBox) {
SkPDFObject* result;
SkAutoMutexAcquire lock(CanonicalShadersMutex());
SkAutoTDelete<State> shaderState(new State(shader, matrix, surfaceBBox));
ShaderCanonicalEntry entry(NULL, shaderState.get());
int index = CanonicalShaders().find(entry);
if (index >= 0) {
result = CanonicalShaders()[index].fPDFShader;
result->ref();
return result;
}
// The PDFShader takes ownership of the shaderSate.
if (shaderState.get()->fType == SkShader::kNone_GradientType) {
result = new SkPDFImageShader(shaderState.detach());
} else {
SkPDFFunctionShader* functionShader =
new SkPDFFunctionShader(shaderState.detach());
if (!functionShader->isValid()) {
delete functionShader;
return NULL;
}
result = functionShader;
}
entry.fPDFShader = result;
CanonicalShaders().push(entry);
return result; // return the reference that came from new.
}
void SkPDFObjRef::addResources(SkTSet<SkPDFObject*>* resourceSet,
SkPDFCatalog* catalog) const {
SkPDFObject* obj = catalog->getSubstituteObject(fObj);
SkASSERT(obj);
if (resourceSet->add(obj)) {
obj->addResources(resourceSet, catalog);
}
}
void PDFDefaultBitmap::addResources(
SkPDFObjNumMap* catalog,
const SkPDFSubstituteMap& substitutes) const {
if (fSMask.get()) {
SkPDFObject* obj = substitutes.getSubstitute(fSMask.get());
SkASSERT(obj);
if (catalog->addObject(obj)) {
obj->addResources(catalog, substitutes);
}
}
}
// static
SkPDFObject* SkPDFShader::GetPDFShaderByState(State* inState) {
SkPDFObject* result;
SkAutoTDelete<State> shaderState(inState);
if (shaderState.get()->fType == SkShader::kNone_GradientType &&
shaderState.get()->fImage.isNull()) {
// TODO(vandebo) This drops SKComposeShader on the floor. We could
// handle compose shader by pulling things up to a layer, drawing with
// the first shader, applying the xfer mode and drawing again with the
// second shader, then applying the layer to the original drawing.
return NULL;
}
ShaderCanonicalEntry entry(NULL, shaderState.get());
int index = CanonicalShaders().find(entry);
if (index >= 0) {
result = CanonicalShaders()[index].fPDFShader;
result->ref();
return result;
}
bool valid = false;
// The PDFShader takes ownership of the shaderSate.
if (shaderState.get()->fType == SkShader::kNone_GradientType) {
SkPDFImageShader* imageShader =
new SkPDFImageShader(shaderState.detach());
valid = imageShader->isValid();
result = imageShader;
} else {
if (shaderState.get()->GradientHasAlpha()) {
SkPDFAlphaFunctionShader* gradientShader =
SkNEW_ARGS(SkPDFAlphaFunctionShader, (shaderState.detach()));
valid = gradientShader->isValid();
result = gradientShader;
} else {
SkPDFFunctionShader* functionShader =
SkNEW_ARGS(SkPDFFunctionShader, (shaderState.detach()));
valid = functionShader->isValid();
result = functionShader;
}
}
if (!valid) {
delete result;
return NULL;
}
entry.fPDFShader = result;
CanonicalShaders().push(entry);
return result; // return the reference that came from new.
}
// Serialize all objects in the fObjNumMap that have not yet been serialized;
void SkPDFObjectSerializer::serializeObjects(SkWStream* wStream) {
const SkTArray<sk_sp<SkPDFObject>>& objects = fObjNumMap.objects();
while (fNextToBeSerialized < objects.count()) {
SkPDFObject* object = objects[fNextToBeSerialized].get();
int32_t index = fNextToBeSerialized + 1; // Skip object 0.
// "The first entry in the [XREF] table (object number 0) is
// always free and has a generation number of 65,535; it is
// the head of the linked list of free objects."
SkASSERT(fOffsets.count() == fNextToBeSerialized);
fOffsets.push(this->offset(wStream));
wStream->writeDecAsText(index);
wStream->writeText(" 0 obj\n"); // Generation number is always 0.
object->emitObject(wStream, fObjNumMap);
wStream->writeText("\nendobj\n");
object->drop();
++fNextToBeSerialized;
}
}
void SkPDFObject::emit(SkWStream* stream, SkPDFCatalog* catalog,
bool indirect) {
SkPDFObject* realObject = catalog->getSubstituteObject(this);
return realObject->emitObject(stream, catalog, indirect);
}
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;
}
