SkPDF: eliminate skpdfpage class

src/pdf/SkPDFPage.cpp

-
-/*
- * Copyright 2010 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-
-#include "SkData.h"
-#include "SkPDFCatalog.h"
-#include "SkPDFDevice.h"
-#include "SkPDFPage.h"
-#include "SkPDFResourceDict.h"
-
-SkPDFPage::SkPDFPage(const SkPDFDevice* content)
-    : SkPDFDict("Page"),
-      fDevice(content) {
-  SkSafeRef(content);
-}
-
-SkPDFPage::~SkPDFPage() {}
-
-void SkPDFPage::finalizePage() {
-    if (fContentStream.get() == NULL) {
-        SkAutoTUnref<SkPDFResourceDict> deviceResourceDict(
-                fDevice->createResourceDict());
-        this->insert("Resources", deviceResourceDict.get());
-        SkSafeUnref(this->insert("MediaBox", fDevice->copyMediaBox()));
-        SkPDFArray* annots = fDevice->getAnnotations();
-        if (annots && annots->size() > 0) {
-            insert("Annots", annots);
-        }
-
-        SkAutoTDelete<SkStreamAsset> content(fDevice->content());
-        fContentStream.reset(new SkPDFStream(content.get()));
-        insert("Contents", new SkPDFObjRef(fContentStream.get()))->unref();
-    }
-}
-
-// static
-void SkPDFPage::GeneratePageTree(const SkTDArray<SkPDFPage*>& pages,
-                                 SkTDArray<SkPDFDict*>* pageTree,
-                                 SkPDFDict** rootNode) {
-    // PDF wants a tree describing all the pages in the document.  We arbitrary
-    // choose 8 (kNodeSize) as the number of allowed children.  The internal
-    // nodes have type "Pages" with an array of children, a parent pointer, and
-    // the number of leaves below the node as "Count."  The leaves are passed
-    // into the method, have type "Page" and need a parent pointer. This method
-    // builds the tree bottom up, skipping internal nodes that would have only
-    // one child.
-    static const int kNodeSize = 8;
-
-    SkAutoTUnref<SkPDFName> kidsName(new SkPDFName("Kids"));
-    SkAutoTUnref<SkPDFName> countName(new SkPDFName("Count"));
-    SkAutoTUnref<SkPDFName> parentName(new SkPDFName("Parent"));
-
-    // curNodes takes a reference to its items, which it passes to pageTree.
-    SkTDArray<SkPDFDict*> curNodes;
-    curNodes.setReserve(pages.count());
-    for (int i = 0; i < pages.count(); i++) {
-        SkSafeRef(pages[i]);
-        curNodes.push(pages[i]);
-    }
-
-    // nextRoundNodes passes its references to nodes on to curNodes.
-    SkTDArray<SkPDFDict*> nextRoundNodes;
-    nextRoundNodes.setReserve((pages.count() + kNodeSize - 1)/kNodeSize);
-
-    int treeCapacity = kNodeSize;
-    do {
-        for (int i = 0; i < curNodes.count(); ) {
-            if (i > 0 && i + 1 == curNodes.count()) {
-                nextRoundNodes.push(curNodes[i]);
-                break;
-            }
-
-            SkPDFDict* newNode = new SkPDFDict("Pages");
-            SkAutoTUnref<SkPDFObjRef> newNodeRef(new SkPDFObjRef(newNode));
-
-            SkAutoTUnref<SkPDFArray> kids(new SkPDFArray);
-            kids->reserve(kNodeSize);
-
-            int count = 0;
-            for (; i < curNodes.count() && count < kNodeSize; i++, count++) {
-                curNodes[i]->insert(parentName.get(), newNodeRef.get());
-                kids->append(new SkPDFObjRef(curNodes[i]))->unref();
-
-                // TODO(vandebo): put the objects in strict access order.
-                // Probably doesn't matter because they are so small.
-                if (curNodes[i] != pages[0]) {
-                    pageTree->push(curNodes[i]);  // Transfer reference.
-                } else {
-                    SkSafeUnref(curNodes[i]);
-                }
-            }
-
-            // treeCapacity is the number of leaf nodes possible for the
-            // current set of subtrees being generated. (i.e. 8, 64, 512, ...).
-            // It is hard to count the number of leaf nodes in the current
-            // subtree. However, by construction, we know that unless it's the
-            // last subtree for the current depth, the leaf count will be
-            // treeCapacity, otherwise it's what ever is left over after
-            // consuming treeCapacity chunks.
-            int pageCount = treeCapacity;
-            if (i == curNodes.count()) {
-                pageCount = ((pages.count() - 1) % treeCapacity) + 1;
-            }
-            newNode->insert(countName.get(), new SkPDFInt(pageCount))->unref();
-            newNode->insert(kidsName.get(), kids.get());
-            nextRoundNodes.push(newNode);  // Transfer reference.
-        }
-
-        curNodes = nextRoundNodes;
-        nextRoundNodes.rewind();
-        treeCapacity *= kNodeSize;
-    } while (curNodes.count() > 1);
-
-    pageTree->push(curNodes[0]);  // Transfer reference.
-    if (rootNode) {
-        *rootNode = curNodes[0];
-    }
-}
-
-const SkTDArray<SkPDFFont*>& SkPDFPage::getFontResources() const {
-    return fDevice->getFontResources();
-}
-
-const SkPDFGlyphSetMap& SkPDFPage::getFontGlyphUsage() const {
-    return fDevice->getFontGlyphUsage();
-}
-
-void SkPDFPage::appendDestinations(SkPDFDict* dict) {
-    fDevice->appendDestinations(dict, this);
-}
-
-SkPDFObject* SkPDFPage::getContentStream() const {
-    return fContentStream.get();
-}