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

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "RecordingTypes.h"
#include "mozilla/FStream.h"
#include <unordered_set>
#include <unordered_map>
#include <functional>
namespace mozilla {
namespace gfx {
class PathRecording;
class DrawEventRecorderPrivate : public DrawEventRecorder
{
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawEventRecorderPrivate, override)
DrawEventRecorderPrivate();
virtual ~DrawEventRecorderPrivate() { }
virtual void Finish() override { ClearResources(); }
virtual void FlushItem(IntRect) { }
void DetatchResources() {
// The iteration is a bit awkward here because our iterator will
// be invalidated by the removal
for (auto font = mStoredFonts.begin(); font != mStoredFonts.end(); ) {
auto oldFont = font++;
(*oldFont)->RemoveUserData(reinterpret_cast<UserDataKey*>(this));
}
for (auto surface = mStoredSurfaces.begin(); surface != mStoredSurfaces.end(); ) {
auto oldSurface = surface++;
(*oldSurface)->RemoveUserData(reinterpret_cast<UserDataKey*>(this));
}
mStoredFonts.clear();
mStoredSurfaces.clear();
}
void ClearResources() {
mUnscaledFonts.clear();
mStoredObjects.clear();
mStoredFontData.clear();
mUnscaledFontMap.clear();
}
template<class S>
void WriteHeader(S& aStream) {
WriteElement(aStream, kMagicInt);
WriteElement(aStream, kMajorRevision);
WriteElement(aStream, kMinorRevision);
}
virtual void RecordEvent(const RecordedEvent &aEvent) = 0;
void WritePath(const PathRecording *aPath);
void AddStoredObject(const ReferencePtr aObject) {
mStoredObjects.insert(aObject);
}
void RemoveStoredObject(const ReferencePtr aObject) {
mStoredObjects.erase(aObject);
}
void AddScaledFont(ScaledFont* aFont) {
mStoredFonts.insert(aFont);
}
void RemoveScaledFont(ScaledFont* aFont) {
mStoredFonts.erase(aFont);
}
void AddSourceSurface(SourceSurface* aSurface) {
mStoredSurfaces.insert(aSurface);
}
void RemoveSourceSurface(SourceSurface* aSurface) {
mStoredSurfaces.erase(aSurface);
}
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();
}
// Returns the index of the UnscaledFont
size_t GetUnscaledFontIndex(UnscaledFont *aFont) {
auto i = mUnscaledFontMap.find(aFont);
size_t index;
if (i == mUnscaledFontMap.end()) {
mUnscaledFonts.push_back(aFont);
index = mUnscaledFonts.size() - 1;
mUnscaledFontMap.insert({{aFont, index}});
} else {
index = i->second;
}
return index;
}
bool WantsExternalFonts() { return mExternalFonts; }
protected:
virtual void Flush() = 0;
std::unordered_set<const void*> mStoredObjects;
std::unordered_set<uint64_t> mStoredFontData;
std::unordered_set<ScaledFont*> mStoredFonts;
std::unordered_set<SourceSurface*> mStoredSurfaces;
std::vector<RefPtr<UnscaledFont>> mUnscaledFonts;
std::unordered_map<UnscaledFont*, size_t> mUnscaledFontMap;
bool mExternalFonts;
};
class DrawEventRecorderFile : public DrawEventRecorderPrivate
{
using char_type = filesystem::Path::value_type;
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawEventRecorderFile, override)
explicit DrawEventRecorderFile(const char_type* aFilename);
~DrawEventRecorderFile();
void RecordEvent(const RecordedEvent &aEvent) override;
/**
* 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_type* 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:
void Flush() override;
mozilla::OFStream mOutputStream;
};
typedef std::function<void(MemStream &aStream, std::vector<RefPtr<UnscaledFont>> &aUnscaledFonts)> SerializeResourcesFn;
// WARNING: This should not be used in its existing state because
// it is likely to OOM because of large continguous allocations.
class DrawEventRecorderMemory final : public DrawEventRecorderPrivate
{
public:
MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(DrawEventRecorderMemory, override)
/**
* Constructs a DrawEventRecorder that stores the recording in memory.
*/
DrawEventRecorderMemory();
explicit DrawEventRecorderMemory(const SerializeResourcesFn &aSerialize);
void RecordEvent(const RecordedEvent &aEvent) override;
/**
* @return the current size of the recording (in chars).
*/
size_t RecordingSize();
/**
* 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();
void Finish() override;
void FlushItem(IntRect) override;
MemStream mOutputStream;
/* The index stream is of the form:
* ItemIndex { size_t dataEnd; size_t extraDataEnd; }
* It gets concatenated to the end of mOutputStream in Finish()
* The last size_t in the stream is offset of the begining of the
* index.
*/
MemStream mIndex;
private:
SerializeResourcesFn mSerializeCallback;
~DrawEventRecorderMemory() {};
void Flush() override;
};
} // namespace gfx
} // namespace mozilla
#endif /* MOZILLA_GFX_DRAWEVENTRECORDER_H_ */