/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkPDFDocument.h"
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#include "SkPDFDocumentPriv.h"
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#include "SkMakeUnique.h"
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#include "SkPDFDevice.h"
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#include "SkPDFDocument.h"
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#include "SkPDFFont.h"
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#include "SkPDFGradientShader.h"
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#include "SkPDFGraphicState.h"
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#include "SkPDFShader.h"
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#include "SkPDFTag.h"
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#include "SkPDFUtils.h"
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#include "SkStream.h"
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#include "SkTo.h"
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#include <utility>
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// For use in SkCanvas::drawAnnotation
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const char* SkPDFGetNodeIdKey() {
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static constexpr char key[] = "PDF_Node_Key";
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return key;
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}
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////////////////////////////////////////////////////////////////////////////////
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void SkPDFOffsetMap::markStartOfDocument(const SkWStream* s) { fBaseOffset = s->bytesWritten(); }
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static size_t difference(size_t minuend, size_t subtrahend) {
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return SkASSERT(minuend >= subtrahend), minuend - subtrahend;
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}
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void SkPDFOffsetMap::markStartOfObject(int referenceNumber, const SkWStream* s) {
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SkASSERT(referenceNumber > 0);
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size_t index = SkToSizeT(referenceNumber - 1);
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if (index >= fOffsets.size()) {
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fOffsets.resize(index + 1);
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}
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fOffsets[index] = SkToInt(difference(s->bytesWritten(), fBaseOffset));
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}
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int SkPDFOffsetMap::objectCount() const {
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return SkToInt(fOffsets.size() + 1); // Include the special zeroth object in the count.
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}
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int SkPDFOffsetMap::emitCrossReferenceTable(SkWStream* s) const {
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int xRefFileOffset = SkToInt(difference(s->bytesWritten(), fBaseOffset));
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s->writeText("xref\n0 ");
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s->writeDecAsText(this->objectCount());
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s->writeText("\n0000000000 65535 f \n");
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for (int offset : fOffsets) {
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SkASSERT(offset > 0); // Offset was set.
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s->writeBigDecAsText(offset, 10);
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s->writeText(" 00000 n \n");
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}
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return xRefFileOffset;
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}
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//
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////////////////////////////////////////////////////////////////////////////////
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#define SKPDF_MAGIC "\xD3\xEB\xE9\xE1"
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#ifndef SK_BUILD_FOR_WIN
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static_assert((SKPDF_MAGIC[0] & 0x7F) == "Skia"[0], "");
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static_assert((SKPDF_MAGIC[1] & 0x7F) == "Skia"[1], "");
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static_assert((SKPDF_MAGIC[2] & 0x7F) == "Skia"[2], "");
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static_assert((SKPDF_MAGIC[3] & 0x7F) == "Skia"[3], "");
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#endif
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static void serializeHeader(SkPDFOffsetMap* offsetMap, SkWStream* wStream) {
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offsetMap->markStartOfDocument(wStream);
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wStream->writeText("%PDF-1.4\n%" SKPDF_MAGIC "\n");
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// The PDF spec recommends including a comment with four
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// bytes, all with their high bits set. "\xD3\xEB\xE9\xE1" is
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// "Skia" with the high bits set.
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}
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#undef SKPDF_MAGIC
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static void begin_indirect_object(SkPDFOffsetMap* offsetMap,
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SkPDFIndirectReference ref,
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SkWStream* s) {
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offsetMap->markStartOfObject(ref.fValue, s);
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s->writeDecAsText(ref.fValue);
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s->writeText(" 0 obj\n"); // Generation number is always 0.
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}
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static void end_indirect_object(SkWStream* s) { s->writeText("\nendobj\n"); }
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// Xref table and footer
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static void serialize_footer(const SkPDFOffsetMap& offsetMap,
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SkWStream* wStream,
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SkPDFIndirectReference infoDict,
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SkPDFIndirectReference docCatalog,
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SkUUID uuid) {
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int xRefFileOffset = offsetMap.emitCrossReferenceTable(wStream);
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SkPDFDict trailerDict;
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trailerDict.insertInt("Size", offsetMap.objectCount());
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SkASSERT(docCatalog != SkPDFIndirectReference());
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trailerDict.insertRef("Root", docCatalog);
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SkASSERT(infoDict != SkPDFIndirectReference());
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trailerDict.insertRef("Info", infoDict);
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if (SkUUID() != uuid) {
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trailerDict.insertObject("ID", SkPDFMetadata::MakePdfId(uuid, uuid));
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}
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wStream->writeText("trailer\n");
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trailerDict.emitObject(wStream);
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wStream->writeText("\nstartxref\n");
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wStream->writeBigDecAsText(xRefFileOffset);
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wStream->writeText("\n%%EOF");
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}
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static SkPDFIndirectReference generate_page_tree(
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SkPDFDocument* doc,
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std::vector<std::unique_ptr<SkPDFDict>> pages,
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const std::vector<SkPDFIndirectReference>& pageRefs) {
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// PDF wants a tree describing all the pages in the document. We arbitrary
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// choose 8 (kNodeSize) as the number of allowed children. The internal
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// nodes have type "Pages" with an array of children, a parent pointer, and
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// the number of leaves below the node as "Count." The leaves are passed
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// into the method, have type "Page" and need a parent pointer. This method
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// builds the tree bottom up, skipping internal nodes that would have only
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// one child.
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SkASSERT(pages.size() > 0);
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struct PageTreeNode {
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std::unique_ptr<SkPDFDict> fNode;
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SkPDFIndirectReference fReservedRef;
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int fPageObjectDescendantCount;
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static std::vector<PageTreeNode> Layer(std::vector<PageTreeNode> vec, SkPDFDocument* doc) {
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std::vector<PageTreeNode> result;
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static constexpr size_t kMaxNodeSize = 8;
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const size_t n = vec.size();
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SkASSERT(n >= 1);
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const size_t result_len = (n - 1) / kMaxNodeSize + 1;
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SkASSERT(result_len >= 1);
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SkASSERT(n == 1 || result_len < n);
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result.reserve(result_len);
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size_t index = 0;
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for (size_t i = 0; i < result_len; ++i) {
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if (n != 1 && index + 1 == n) { // No need to create a new node.
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result.push_back(std::move(vec[index++]));
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continue;
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}
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SkPDFIndirectReference parent = doc->reserveRef();
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auto kids_list = SkPDFMakeArray();
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int descendantCount = 0;
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for (size_t j = 0; j < kMaxNodeSize && index < n; ++j) {
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PageTreeNode& node = vec[index++];
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node.fNode->insertRef("Parent", parent);
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kids_list->appendRef(doc->emit(*node.fNode, node.fReservedRef));
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descendantCount += node.fPageObjectDescendantCount;
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}
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auto next = SkPDFMakeDict("Pages");
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next->insertInt("Count", descendantCount);
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next->insertObject("Kids", std::move(kids_list));
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result.push_back(PageTreeNode{std::move(next), parent, descendantCount});
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}
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return result;
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}
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};
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std::vector<PageTreeNode> currentLayer;
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currentLayer.reserve(pages.size());
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SkASSERT(pages.size() == pageRefs.size());
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for (size_t i = 0; i < pages.size(); ++i) {
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currentLayer.push_back(PageTreeNode{std::move(pages[i]), pageRefs[i], 1});
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}
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currentLayer = PageTreeNode::Layer(std::move(currentLayer), doc);
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while (currentLayer.size() > 1) {
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currentLayer = PageTreeNode::Layer(std::move(currentLayer), doc);
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}
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SkASSERT(currentLayer.size() == 1);
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const PageTreeNode& root = currentLayer[0];
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return doc->emit(*root.fNode, root.fReservedRef);
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}
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template<typename T, typename... Args>
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static void reset_object(T* dst, Args&&... args) {
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dst->~T();
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new (dst) T(std::forward<Args>(args)...);
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}
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////////////////////////////////////////////////////////////////////////////////
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SkPDFDocument::SkPDFDocument(SkWStream* stream,
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SkPDF::Metadata metadata)
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: SkDocument(stream)
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, fMetadata(std::move(metadata)) {
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constexpr float kDpiForRasterScaleOne = 72.0f;
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if (fMetadata.fRasterDPI != kDpiForRasterScaleOne) {
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fInverseRasterScale = kDpiForRasterScaleOne / fMetadata.fRasterDPI;
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fRasterScale = fMetadata.fRasterDPI / kDpiForRasterScaleOne;
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}
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if (fMetadata.fStructureElementTreeRoot) {
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fTagTree.init(fMetadata.fStructureElementTreeRoot);
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}
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fExecutor = metadata.fExecutor;
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}
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SkPDFDocument::~SkPDFDocument() {
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// subclasses of SkDocument must call close() in their destructors.
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this->close();
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}
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SkPDFIndirectReference SkPDFDocument::emit(const SkPDFObject& object, SkPDFIndirectReference ref){
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object.emitObject(this->beginObject(ref));
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this->endObject();
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return ref;
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}
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SkWStream* SkPDFDocument::beginObject(SkPDFIndirectReference ref) {
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fMutex.acquire();
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begin_indirect_object(&fOffsetMap, ref, this->getStream());
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return this->getStream();
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};
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void SkPDFDocument::endObject() {
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end_indirect_object(this->getStream());
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fMutex.release();
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};
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static SkSize operator*(SkISize u, SkScalar s) { return SkSize{u.width() * s, u.height() * s}; }
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static SkSize operator*(SkSize u, SkScalar s) { return SkSize{u.width() * s, u.height() * s}; }
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SkCanvas* SkPDFDocument::onBeginPage(SkScalar width, SkScalar height) {
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SkASSERT(fCanvas.imageInfo().dimensions().isZero());
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if (fPages.empty()) {
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// if this is the first page if the document.
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{
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SkAutoMutexAcquire autoMutexAcquire(fMutex);
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serializeHeader(&fOffsetMap, this->getStream());
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}
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fInfoDict = this->emit(*SkPDFMetadata::MakeDocumentInformationDict(fMetadata));
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if (fMetadata.fPDFA) {
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fUUID = SkPDFMetadata::CreateUUID(fMetadata);
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// We use the same UUID for Document ID and Instance ID since this
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// is the first revision of this document (and Skia does not
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// support revising existing PDF documents).
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// If we are not in PDF/A mode, don't use a UUID since testing
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// works best with reproducible outputs.
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fXMP = SkPDFMetadata::MakeXMPObject(fMetadata, fUUID, fUUID, this);
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}
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}
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// By scaling the page at the device level, we will create bitmap layer
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// devices at the rasterized scale, not the 72dpi scale. Bitmap layer
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// devices are created when saveLayer is called with an ImageFilter; see
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// SkPDFDevice::onCreateDevice().
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SkISize pageSize = (SkSize{width, height} * fRasterScale).toRound();
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SkMatrix initialTransform;
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// Skia uses the top left as the origin but PDF natively has the origin at the
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// bottom left. This matrix corrects for that, as well as the raster scale.
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initialTransform.setScaleTranslate(fInverseRasterScale, -fInverseRasterScale,
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0, fInverseRasterScale * pageSize.height());
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fPageDevice = sk_make_sp<SkPDFDevice>(pageSize, this, initialTransform);
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reset_object(&fCanvas, fPageDevice);
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fCanvas.scale(fRasterScale, fRasterScale);
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fPageRefs.push_back(this->reserveRef());
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return &fCanvas;
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}
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void SkPDFDocument::onEndPage() {
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SkASSERT(!fCanvas.imageInfo().dimensions().isZero());
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reset_object(&fCanvas);
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SkASSERT(fPageDevice);
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auto page = SkPDFMakeDict("Page");
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SkSize mediaSize = fPageDevice->imageInfo().dimensions() * fInverseRasterScale;
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std::unique_ptr<SkStreamAsset> pageContent = fPageDevice->content();
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auto resourceDict = fPageDevice->makeResourceDict();
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auto annotations = fPageDevice->getAnnotations();
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SkASSERT(fPageRefs.size() > 0);
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fPageDevice->appendDestinations(&fDests, fPageRefs.back());
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fPageDevice = nullptr;
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page->insertObject("Resources", std::move(resourceDict));
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page->insertObject("MediaBox", SkPDFUtils::RectToArray(SkRect::MakeSize(mediaSize)));
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if (annotations) {
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page->insertObject("Annots", std::move(annotations));
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}
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page->insertRef("Contents", SkPDFStreamOut(nullptr, std::move(pageContent), this));
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// The StructParents unique identifier for each page is just its
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// 0-based page index.
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page->insertInt("StructParents", SkToInt(this->currentPageIndex()));
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fPages.emplace_back(std::move(page));
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}
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void SkPDFDocument::onAbort() {
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this->waitForJobs();
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}
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static sk_sp<SkData> SkSrgbIcm() {
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// Source: http://www.argyllcms.com/icclibsrc.html
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static const char kProfile[] =
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"\0\0\14\214argl\2 \0\0mntrRGB XYZ \7\336\0\1\0\6\0\26\0\17\0:acspM"
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"SFT\0\0\0\0IEC sRGB\0\0\0\0\0\0\0\0\0\0\0\0\0\0\366\326\0\1\0\0\0\0"
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"\323-argl\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
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"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\21desc\0\0\1P\0\0\0\231cprt\0"
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"\0\1\354\0\0\0gdmnd\0\0\2T\0\0\0pdmdd\0\0\2\304\0\0\0\210tech\0\0\3"
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"L\0\0\0\14vued\0\0\3X\0\0\0gview\0\0\3\300\0\0\0$lumi\0\0\3\344\0\0"
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"\0\24meas\0\0\3\370\0\0\0$wtpt\0\0\4\34\0\0\0\24bkpt\0\0\0040\0\0\0"
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"\24rXYZ\0\0\4D\0\0\0\24gXYZ\0\0\4X\0\0\0\24bXYZ\0\0\4l\0\0\0\24rTR"
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"C\0\0\4\200\0\0\10\14gTRC\0\0\4\200\0\0\10\14bTRC\0\0\4\200\0\0\10"
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"\14desc\0\0\0\0\0\0\0?sRGB IEC61966-2.1 (Equivalent to www.srgb.co"
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"m 1998 HP profile)\0\0\0\0\0\0\0\0\0\0\0?sRGB IEC61966-2.1 (Equiva"
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"lent to www.srgb.com 1998 HP profile)\0\0\0\0\0\0\0\0text\0\0\0\0C"
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"reated by Graeme W. Gill. Released into the public domain. No Warr"
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"anty, Use at your own risk.\0\0desc\0\0\0\0\0\0\0\26IEC http://www"
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".iec.ch\0\0\0\0\0\0\0\0\0\0\0\26IEC http://www.iec.ch\0\0\0\0\0\0\0"
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"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
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"\0\0\0\0\0\0desc\0\0\0\0\0\0\0.IEC 61966-2.1 Default RGB colour sp"
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"ace - sRGB\0\0\0\0\0\0\0\0\0\0\0.IEC 61966-2.1 Default RGB colour "
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"space - sRGB\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0sig \0\0\0"
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"\0CRT desc\0\0\0\0\0\0\0\rIEC61966-2.1\0\0\0\0\0\0\0\0\0\0\0\rIEC6"
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"1966-2.1\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
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"\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0view\0\0\0\0"
|
"\0\23\244|\0\24_0\0\20\316\2\0\3\355\262\0\4\23\n\0\3\\g\0\0\0\1XY"
|
"Z \0\0\0\0\0L\n=\0P\0\0\0W\36\270meas\0\0\0\0\0\0\0\1\0\0\0\0\0\0\0"
|
"\0\0\0\0\0\0\0\0\0\0\0\2\217\0\0\0\2XYZ \0\0\0\0\0\0\363Q\0\1\0\0\0"
|
"\1\26\314XYZ \0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0XYZ \0\0\0\0\0\0o\240"
|
"\0\0008\365\0\0\3\220XYZ \0\0\0\0\0\0b\227\0\0\267\207\0\0\30\331X"
|
"YZ \0\0\0\0\0\0$\237\0\0\17\204\0\0\266\304curv\0\0\0\0\0\0\4\0\0\0"
|
"\0\5\0\n\0\17\0\24\0\31\0\36\0#\0(\0-\0002\0007\0;\0@\0E\0J\0O\0T\0"
|
"Y\0^\0c\0h\0m\0r\0w\0|\0\201\0\206\0\213\0\220\0\225\0\232\0\237\0"
|
"\244\0\251\0\256\0\262\0\267\0\274\0\301\0\306\0\313\0\320\0\325\0"
|
"\333\0\340\0\345\0\353\0\360\0\366\0\373\1\1\1\7\1\r\1\23\1\31\1\37"
|
"\1%\1+\0012\0018\1>\1E\1L\1R\1Y\1`\1g\1n\1u\1|\1\203\1\213\1\222\1"
|
"\232\1\241\1\251\1\261\1\271\1\301\1\311\1\321\1\331\1\341\1\351\1"
|
"\362\1\372\2\3\2\14\2\24\2\35\2&\2/\0028\2A\2K\2T\2]\2g\2q\2z\2\204"
|
"\2\216\2\230\2\242\2\254\2\266\2\301\2\313\2\325\2\340\2\353\2\365"
|
"\3\0\3\13\3\26\3!\3-\0038\3C\3O\3Z\3f\3r\3~\3\212\3\226\3\242\3\256"
|
"\3\272\3\307\3\323\3\340\3\354\3\371\4\6\4\23\4 \4-\4;\4H\4U\4c\4q"
|
"\4~\4\214\4\232\4\250\4\266\4\304\4\323\4\341\4\360\4\376\5\r\5\34"
|
"\5+\5:\5I\5X\5g\5w\5\206\5\226\5\246\5\265\5\305\5\325\5\345\5\366"
|
"\6\6\6\26\6'\0067\6H\6Y\6j\6{\6\214\6\235\6\257\6\300\6\321\6\343\6"
|
"\365\7\7\7\31\7+\7=\7O\7a\7t\7\206\7\231\7\254\7\277\7\322\7\345\7"
|
"\370\10\13\10\37\0102\10F\10Z\10n\10\202\10\226\10\252\10\276\10\322"
|
"\10\347\10\373\t\20\t%\t:\tO\td\ty\t\217\t\244\t\272\t\317\t\345\t"
|
"\373\n\21\n'\n=\nT\nj\n\201\n\230\n\256\n\305\n\334\n\363\13\13\13"
|
"\"\0139\13Q\13i\13\200\13\230\13\260\13\310\13\341\13\371\14\22\14"
|
"*\14C\14\\\14u\14\216\14\247\14\300\14\331\14\363\r\r\r&\r@\rZ\rt\r"
|
"\216\r\251\r\303\r\336\r\370\16\23\16.\16I\16d\16\177\16\233\16\266"
|
"\16\322\16\356\17\t\17%\17A\17^\17z\17\226\17\263\17\317\17\354\20"
|
"\t\20&\20C\20a\20~\20\233\20\271\20\327\20\365\21\23\0211\21O\21m\21"
|
"\214\21\252\21\311\21\350\22\7\22&\22E\22d\22\204\22\243\22\303\22"
|
"\343\23\3\23#\23C\23c\23\203\23\244\23\305\23\345\24\6\24'\24I\24j"
|
"\24\213\24\255\24\316\24\360\25\22\0254\25V\25x\25\233\25\275\25\340"
|
"\26\3\26&\26I\26l\26\217\26\262\26\326\26\372\27\35\27A\27e\27\211"
|
"\27\256\27\322\27\367\30\33\30@\30e\30\212\30\257\30\325\30\372\31"
|
" \31E\31k\31\221\31\267\31\335\32\4\32*\32Q\32w\32\236\32\305\32\354"
|
"\33\24\33;\33c\33\212\33\262\33\332\34\2\34*\34R\34{\34\243\34\314"
|
"\34\365\35\36\35G\35p\35\231\35\303\35\354\36\26\36@\36j\36\224\36"
|
"\276\36\351\37\23\37>\37i\37\224\37\277\37\352 \25 A l \230 \304 \360"
|
"!\34!H!u!\241!\316!\373\"'\"U\"\202\"\257\"\335#\n#8#f#\224#\302#\360"
|
"$\37$M$|$\253$\332%\t%8%h%\227%\307%\367&'&W&\207&\267&\350'\30'I'"
|
"z'\253'\334(\r(?(q(\242(\324)\6)8)k)\235)\320*\2*5*h*\233*\317+\2+"
|
"6+i+\235+\321,\5,9,n,\242,\327-\14-A-v-\253-\341.\26.L.\202.\267.\356"
|
"/$/Z/\221/\307/\376050l0\2440\3331\0221J1\2021\2721\3622*2c2\2332\324"
|
"3\r3F3\1773\2703\3614+4e4\2364\3305\0235M5\2075\3025\375676r6\2566"
|
"\3517$7`7\2347\3278\0248P8\2148\3109\0059B9\1779\2749\371:6:t:\262"
|
":\357;-;k;\252;\350<'<e<\244<\343=\"=a=\241=\340> >`>\240>\340?!?a"
|
"?\242?\342@#@d@\246@\347A)AjA\254A\356B0BrB\265B\367C:C}C\300D\3DG"
|
"D\212D\316E\22EUE\232E\336F\"FgF\253F\360G5G{G\300H\5HKH\221H\327I"
|
"\35IcI\251I\360J7J}J\304K\14KSK\232K\342L*LrL\272M\2MJM\223M\334N%"
|
"NnN\267O\0OIO\223O\335P'PqP\273Q\6QPQ\233Q\346R1R|R\307S\23S_S\252"
|
"S\366TBT\217T\333U(UuU\302V\17V\\V\251V\367WDW\222W\340X/X}X\313Y\32"
|
"YiY\270Z\7ZVZ\246Z\365[E[\225[\345\\5\\\206\\\326]']x]\311^\32^l^\275"
|
"_\17_a_\263`\5`W`\252`\374aOa\242a\365bIb\234b\360cCc\227c\353d@d\224"
|
"d\351e=e\222e\347f=f\222f\350g=g\223g\351h?h\226h\354iCi\232i\361j"
|
"Hj\237j\367kOk\247k\377lWl\257m\10m`m\271n\22nkn\304o\36oxo\321p+p"
|
"\206p\340q:q\225q\360rKr\246s\1s]s\270t\24tpt\314u(u\205u\341v>v\233"
|
"v\370wVw\263x\21xnx\314y*y\211y\347zFz\245{\4{c{\302|!|\201|\341}A"
|
"}\241~\1~b~\302\177#\177\204\177\345\200G\200\250\201\n\201k\201\315"
|
"\2020\202\222\202\364\203W\203\272\204\35\204\200\204\343\205G\205"
|
"\253\206\16\206r\206\327\207;\207\237\210\4\210i\210\316\2113\211\231"
|
"\211\376\212d\212\312\2130\213\226\213\374\214c\214\312\2151\215\230"
|
"\215\377\216f\216\316\2176\217\236\220\6\220n\220\326\221?\221\250"
|
"\222\21\222z\222\343\223M\223\266\224 \224\212\224\364\225_\225\311"
|
"\2264\226\237\227\n\227u\227\340\230L\230\270\231$\231\220\231\374"
|
"\232h\232\325\233B\233\257\234\34\234\211\234\367\235d\235\322\236"
|
"@\236\256\237\35\237\213\237\372\240i\240\330\241G\241\266\242&\242"
|
"\226\243\6\243v\243\346\244V\244\307\2458\245\251\246\32\246\213\246"
|
"\375\247n\247\340\250R\250\304\2517\251\251\252\34\252\217\253\2\253"
|
"u\253\351\254\\\254\320\255D\255\270\256-\256\241\257\26\257\213\260"
|
"\0\260u\260\352\261`\261\326\262K\262\302\2638\263\256\264%\264\234"
|
"\265\23\265\212\266\1\266y\266\360\267h\267\340\270Y\270\321\271J\271"
|
"\302\272;\272\265\273.\273\247\274!\274\233\275\25\275\217\276\n\276"
|
"\204\276\377\277z\277\365\300p\300\354\301g\301\343\302_\302\333\303"
|
"X\303\324\304Q\304\316\305K\305\310\306F\306\303\307A\307\277\310="
|
"\310\274\311:\311\271\3128\312\267\3136\313\266\3145\314\265\3155\315"
|
"\265\3166\316\266\3177\317\270\3209\320\272\321<\321\276\322?\322\301"
|
"\323D\323\306\324I\324\313\325N\325\321\326U\326\330\327\\\327\340"
|
"\330d\330\350\331l\331\361\332v\332\373\333\200\334\5\334\212\335\20"
|
"\335\226\336\34\336\242\337)\337\257\3406\340\275\341D\341\314\342"
|
"S\342\333\343c\343\353\344s\344\374\345\204\346\r\346\226\347\37\347"
|
"\251\3502\350\274\351F\351\320\352[\352\345\353p\353\373\354\206\355"
|
"\21\355\234\356(\356\264\357@\357\314\360X\360\345\361r\361\377\362"
|
"\214\363\31\363\247\3644\364\302\365P\365\336\366m\366\373\367\212"
|
"\370\31\370\250\3718\371\307\372W\372\347\373w\374\7\374\230\375)\375"
|
"\272\376K\376\334\377m\377\377";
|
const size_t kProfileLength = 3212;
|
static_assert(kProfileLength == sizeof(kProfile) - 1, "");
|
return SkData::MakeWithoutCopy(kProfile, kProfileLength);
|
}
|
|
static SkPDFIndirectReference make_srgb_color_profile(SkPDFDocument* doc) {
|
std::unique_ptr<SkPDFDict> dict = SkPDFMakeDict();
|
dict->insertInt("N", 3);
|
dict->insertObject("Range", SkPDFMakeArray(0, 1, 0, 1, 0, 1));
|
return SkPDFStreamOut(std::move(dict), SkMemoryStream::Make(SkSrgbIcm()), doc, true);
|
}
|
|
static std::unique_ptr<SkPDFArray> make_srgb_output_intents(SkPDFDocument* doc) {
|
// sRGB is specified by HTML, CSS, and SVG.
|
auto outputIntent = SkPDFMakeDict("OutputIntent");
|
outputIntent->insertName("S", "GTS_PDFA1");
|
outputIntent->insertString("RegistryName", "http://www.color.org");
|
outputIntent->insertString("OutputConditionIdentifier",
|
"Custom");
|
outputIntent->insertString("Info","sRGB IEC61966-2.1");
|
outputIntent->insertRef("DestOutputProfile", make_srgb_color_profile(doc));
|
auto intentArray = SkPDFMakeArray();
|
intentArray->appendObject(std::move(outputIntent));
|
return intentArray;
|
}
|
|
SkPDFIndirectReference SkPDFDocument::getPage(size_t pageIndex) const {
|
SkASSERT(pageIndex < fPageRefs.size());
|
return fPageRefs[pageIndex];
|
}
|
|
int SkPDFDocument::getMarkIdForNodeId(int nodeId) {
|
return fTagTree.getMarkIdForNodeId(nodeId, SkToUInt(this->currentPageIndex()));
|
}
|
|
static std::vector<const SkPDFFont*> get_fonts(const SkPDFDocument& canon) {
|
std::vector<const SkPDFFont*> fonts;
|
fonts.reserve(canon.fFontMap.count());
|
// Sort so the output PDF is reproducible.
|
canon.fFontMap.foreach([&fonts](uint64_t, const SkPDFFont& font) { fonts.push_back(&font); });
|
std::sort(fonts.begin(), fonts.end(), [](const SkPDFFont* u, const SkPDFFont* v) {
|
return u->indirectReference().fValue < v->indirectReference().fValue;
|
});
|
return fonts;
|
}
|
|
void SkPDFDocument::onClose(SkWStream* stream) {
|
SkASSERT(fCanvas.imageInfo().dimensions().isZero());
|
if (fPages.empty()) {
|
this->waitForJobs();
|
return;
|
}
|
auto docCatalog = SkPDFMakeDict("Catalog");
|
if (fMetadata.fPDFA) {
|
SkASSERT(fXMP != SkPDFIndirectReference());
|
docCatalog->insertRef("Metadata", fXMP);
|
// Don't specify OutputIntents if we are not in PDF/A mode since
|
// no one has ever asked for this feature.
|
docCatalog->insertObject("OutputIntents", make_srgb_output_intents(this));
|
}
|
|
docCatalog->insertRef("Pages", generate_page_tree(this, std::move(fPages), fPageRefs));
|
|
if (fDests.size() > 0) {
|
docCatalog->insertRef("Dests", this->emit(fDests));
|
reset_object(&fDests);
|
}
|
|
// Handle tagged PDFs.
|
if (SkPDFIndirectReference root = fTagTree.makeStructTreeRoot(this)) {
|
// In the document catalog, indicate that this PDF is tagged.
|
auto markInfo = SkPDFMakeDict("MarkInfo");
|
markInfo->insertBool("Marked", true);
|
docCatalog->insertObject("MarkInfo", std::move(markInfo));
|
docCatalog->insertRef("StructTreeRoot", root);
|
}
|
|
auto docCatalogRef = this->emit(*docCatalog);
|
|
for (const SkPDFFont* f : get_fonts(*this)) {
|
f->emitSubset(this);
|
}
|
|
this->waitForJobs();
|
{
|
SkAutoMutexAcquire autoMutexAcquire(fMutex);
|
serialize_footer(fOffsetMap, this->getStream(), fInfoDict, docCatalogRef, fUUID);
|
}
|
}
|
|
void SkPDFDocument::incrementJobCount() { fJobCount++; }
|
|
void SkPDFDocument::signalJobComplete() { fSemaphore.signal(); }
|
|
void SkPDFDocument::waitForJobs() {
|
// fJobCount can increase while we wait.
|
while (fJobCount > 0) {
|
fSemaphore.wait();
|
--fJobCount;
|
}
|
}
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
void SkPDF::SetNodeId(SkCanvas* canvas, int nodeID) {
|
sk_sp<SkData> payload = SkData::MakeWithCopy(&nodeID, sizeof(nodeID));
|
const char* key = SkPDFGetNodeIdKey();
|
canvas->drawAnnotation({0, 0, 0, 0}, key, payload.get());
|
}
|
|
sk_sp<SkDocument> SkPDF::MakeDocument(SkWStream* stream, const SkPDF::Metadata& metadata) {
|
SkPDF::Metadata meta = metadata;
|
if (meta.fRasterDPI <= 0) {
|
meta.fRasterDPI = 72.0f;
|
}
|
if (meta.fEncodingQuality < 0) {
|
meta.fEncodingQuality = 0;
|
}
|
return stream ? sk_make_sp<SkPDFDocument>(stream, std::move(meta)) : nullptr;
|
}
|