SkPDF: remove SK_NO_FLATE & dead code in SkPDFStream

src/pdf/SkPDFStream.cpp

 
 /*
  * Copyright 2010 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkData.h"
 #include "SkFlate.h"
 #include "SkPDFCatalog.h"
 #include "SkPDFStream.h"
 #include "SkStream.h"
 #include "SkStreamPriv.h"
 
 SkPDFStream::SkPDFStream(SkStream* stream) : fState(kUnused_State) {
     this->setData(stream);
 }
 
 SkPDFStream::SkPDFStream(SkData* data) : fState(kUnused_State) {
     this->setData(data);
 }
 
-SkPDFStream::SkPDFStream(const SkPDFStream& pdfStream)
-        : SkPDFDict(),
-          fState(kUnused_State) {
-    this->setData(pdfStream.fDataStream.get());
-    bool removeLength = true;
-    // Don't uncompress an already compressed stream, but we could.
-    if (pdfStream.fState == kCompressed_State) {
-        fState = kCompressed_State;
-        removeLength = false;
-    }
-    this->mergeFrom(pdfStream);
-    if (removeLength) {
-        this->remove("Length");
-    }
-}
-
 SkPDFStream::~SkPDFStream() {}
 
 void SkPDFStream::emitObject(SkWStream* stream, SkPDFCatalog* catalog) {
-    if (!this->populate(catalog)) {
-        return fSubstitute->emitObject(stream, catalog);
-    }
-
+    SkAssertResult(this->populate(catalog));
     this->INHERITED::emitObject(stream, catalog);
     stream->writeText(" stream\n");
     stream->writeStream(fDataStream.get(), fDataStream->getLength());
     SkAssertResult(fDataStream->rewind());
     stream->writeText("\nendstream");
 }
 
 SkPDFStream::SkPDFStream() : fState(kUnused_State) {}
 
 void SkPDFStream::setData(SkData* data) {
     // FIXME: Don't swap if the data is the same.
     fDataStream.reset(SkNEW_ARGS(SkMemoryStream, (data)));
 }
 
 void SkPDFStream::setData(SkStream* stream) {
+    SkASSERT(stream);
     // Code assumes that the stream starts at the beginning and is rewindable.
-    if (stream) {
-        // SkStreamRewindableFromSkStream will try stream->duplicate().
-        fDataStream.reset(SkStreamRewindableFromSkStream(stream));
-        SkASSERT(fDataStream.get());
-    } else {
-        // Use an empty memory stream.
-        fDataStream.reset(SkNEW(SkMemoryStream));
-    }
+    // SkStreamRewindableFromSkStream will try stream->duplicate().
+    fDataStream.reset(SkStreamRewindableFromSkStream(stream));
+    SkASSERT(fDataStream.get());
 }
 
 size_t SkPDFStream::dataSize() const {
     SkASSERT(fDataStream->hasLength());
     return fDataStream->getLength();
 }
 
 bool SkPDFStream::populate(SkPDFCatalog* catalog) {
-#ifdef SK_NO_FLATE
-    if (fState == kUnused_State) {
-        fState = kNoCompression_State;
-        insertInt("Length", this->dataSize());
-    }
-    return true;
-
-#else  // !SK_NO_FLATE
-
     if (fState == kUnused_State) {
         fState = kNoCompression_State;
         SkDynamicMemoryWStream compressedData;
 
         SkAssertResult(
                 SkFlate::Deflate(fDataStream.get(), &compressedData));
         SkAssertResult(fDataStream->rewind());
         if (compressedData.getOffset() < this->dataSize()) {
             SkAutoTDelete<SkStream> compressed(
                     compressedData.detachAsStream());
             this->setData(compressed.get());
             insertName("Filter", "FlateDecode");
         }
         fState = kCompressed_State;
         insertInt("Length", this->dataSize());
     }
-    else if (fState == kNoCompression_State) {
-        if (!fSubstitute.get()) {
-            fSubstitute.reset(new SkPDFStream(*this));
-            catalog->setSubstitute(this, fSubstitute.get());
-        }
-        return false;
-    }
     return true;
-#endif  // SK_NO_FLATE
 }