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/*
* 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 "SkDeflate.h"
#include "SkPDFStream.h"
#include "SkStream.h"
#include "SkStreamPriv.h"
SkPDFStream::~SkPDFStream() {}
void SkPDFStream::emitObject(SkWStream* stream,
const SkPDFObjNumMap& objNumMap,
const SkPDFSubstituteMap& substitutes) const {
SkASSERT(fCompressedData);
this->INHERITED::emitObject(stream, objNumMap, substitutes);
// duplicate (a cheap operation) preserves const on fCompressedData.
SkAutoTDelete<SkStreamRewindable> dup(fCompressedData->duplicate());
SkASSERT(dup);
SkASSERT(dup->hasLength());
stream->writeText(" stream\n");
stream->writeStream(dup.get(), dup->getLength());
stream->writeText("\nendstream");
}
void SkPDFStream::setData(SkStream* stream) {
SkASSERT(!fCompressedData); // Only call this function once.
SkASSERT(stream);
// Code assumes that the stream starts at the beginning.
SkDynamicMemoryWStream compressedData;
SkDeflateWStream deflateWStream(&compressedData);
SkStreamCopy(&deflateWStream, stream);
deflateWStream.finalize();
size_t length = compressedData.bytesWritten();
if (stream->hasLength()) {
SkAutoTDelete<SkStreamRewindable> dup(stream->duplicate());
if (dup && dup->hasLength() &&
dup->getLength() <= length + strlen("/Filter_/FlateDecode_")) {
this->insertInt("Length", dup->getLength());
fCompressedData.reset(dup.release());
return;
}
}
fCompressedData.reset(compressedData.detachAsStream());
this->insertName("Filter", "FlateDecode");
this->insertInt("Length", length);
}
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