gecko-dev/gfx/2d/DrawEventRecorder.h

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3.9 KiB
C++

/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef MOZILLA_GFX_DRAWEVENTRECORDER_H_
#define MOZILLA_GFX_DRAWEVENTRECORDER_H_
#include "2D.h"
#include "RecordedEvent.h"
#include <ostream>
#include <fstream>
#if defined(_MSC_VER)
#include <unordered_set>
#else
#include <set>
#endif
namespace mozilla {
namespace gfx {
class PathRecording;
class DrawEventRecorderPrivate : public DrawEventRecorder
{
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawEventRecorderPrivate)
explicit DrawEventRecorderPrivate(std::ostream *aStream);
virtual ~DrawEventRecorderPrivate() { }
void WriteHeader();
void RecordEvent(const RecordedEvent &aEvent);
void WritePath(const PathRecording *aPath);
void AddStoredObject(const ReferencePtr aObject) {
mStoredObjects.insert(aObject);
}
void RemoveStoredObject(const ReferencePtr aObject) {
mStoredObjects.erase(aObject);
}
bool HasStoredObject(const ReferencePtr aObject) {
return mStoredObjects.find(aObject) != mStoredObjects.end();
}
void AddStoredFontData(const uint64_t aFontDataKey) {
mStoredFontData.insert(aFontDataKey);
}
bool HasStoredFontData(const uint64_t aFontDataKey) {
return mStoredFontData.find(aFontDataKey) != mStoredFontData.end();
}
protected:
std::ostream *mOutputStream;
virtual void Flush() = 0;
#if defined(_MSC_VER)
typedef std::unordered_set<const void*> ObjectSet;
typedef std::unordered_set<uint64_t> Uint64Set;
#else
typedef std::set<const void*> ObjectSet;
typedef std::set<uint64_t> Uint64Set;
#endif
ObjectSet mStoredObjects;
Uint64Set mStoredFontData;
};
class DrawEventRecorderFile : public DrawEventRecorderPrivate
{
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawEventRecorderFile)
explicit DrawEventRecorderFile(const char *aFilename);
~DrawEventRecorderFile();
/**
* Returns whether a recording file is currently open.
*/
bool IsOpen();
/**
* Opens new file with the provided name. The recorder does NOT forget which
* objects it has recorded. This can be used with Close, so that a recording
* can be processed in chunks. The file must not already be open.
*/
void OpenNew(const char *aFilename);
/**
* Closes the file so that it can be processed. The recorder does NOT forget
* which objects it has recorded. This can be used with OpenNew, so that a
* recording can be processed in chunks. The file must be open.
*/
void Close();
private:
virtual void Flush();
std::ofstream mOutputFile;
};
class DrawEventRecorderMemory final : public DrawEventRecorderPrivate
{
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawEventRecorderMemory)
/**
* Constructs a DrawEventRecorder that stores the recording in memory.
*/
DrawEventRecorderMemory();
/**
* @return the current size of the recording (in chars).
*/
size_t RecordingSize();
/**
* Copies at most aBufferLen chars of the recording into aBuffer.
*
* @param aBuffer buffer to receive the recording chars
* @param aBufferLen length of aBuffer
* @return true if copied successfully
*/
bool CopyRecording(char* aBuffer, size_t aBufferLen);
/**
* Wipes the internal recording buffer, but the recorder does NOT forget which
* objects it has recorded. This can be used so that a recording can be copied
* and processed in chunks, releasing memory as it goes.
*/
void WipeRecording();
/**
* Gets a readable reference of the underlying stream, reset to the beginning.
*/
std::istream& GetInputStream() {
mMemoryStream.seekg(0);
return mMemoryStream;
}
private:
~DrawEventRecorderMemory() {};
void Flush() final;
std::stringstream mMemoryStream;
};
} // namespace gfx
} // namespace mozilla
#endif /* MOZILLA_GFX_DRAWEVENTRECORDER_H_ */