KisFrameDataSerializer.h

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/*
 *  SPDX-FileCopyrightText: 2018 Dmitry Kazakov <dimula73@gmail.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
#ifndef KISFRAMEDATASERIALIZER_H
#define KISFRAMEDATASERIALIZER_H
 
#include "kritaui_export.h"
#include <QScopedPointer>
#include "opengl/kis_texture_tile_info_pool.h"
 
// TODO: extract DataBuffer into a separate file
#include "opengl/kis_texture_tile_update_info.h"
 
#include <vector>
#include <boost/optional.hpp>
 
class QString;
 
 
class KRITAUI_EXPORT KisFrameDataSerializer
{
public:
    struct FrameTile
    {
        FrameTile(KisTextureTileInfoPoolSP pool) : data(pool) {}
 
        FrameTile(FrameTile &&rhs) = default;
        FrameTile& operator=(FrameTile &&rhs) = default;
 
        FrameTile(const FrameTile &rhs) = delete;
        FrameTile& operator=(FrameTile &rhs) = delete;
 
        bool isValid() const {
            return data.data();
        }
 
        FrameTile clone() const{
            FrameTile tile(data.pool());
            tile.col = col;
            tile.row = row;
            tile.rect = rect;
            tile.data.allocate(data.pixelSize());
 
            const int bufferSize = data.pixelSize() * rect.width() * rect.height();
            memcpy(tile.data.data(), data.data(), bufferSize);
 
            return tile;
        }
 
        int col = -1;
        int row = -1;
        bool isCompressed = false;
        QRect rect;
        DataBuffer data;
    };
 
    struct Frame
    {
        Frame() = default;
 
        Frame(Frame&&rhs) = default;
        Frame& operator=(Frame &&rhs) = default;
 
        Frame(const Frame &rhs) = delete;
        Frame& operator=(Frame &rhs) = delete;
 
        Frame clone() const {
            Frame frame;
            frame.pixelSize = pixelSize;
            for (auto it = frameTiles.begin(); it != frameTiles.end(); ++it) {
                frame.frameTiles.push_back(it->clone());
            }
            return frame;
        }
 
        int pixelSize = 0;
        std::vector<FrameTile> frameTiles;
 
        bool isValid() const {
            return pixelSize > 0;
        }
    };
 
public:
    KisFrameDataSerializer();
    KisFrameDataSerializer(const QString &frameCachePath);
    ~KisFrameDataSerializer();
 
    int saveFrame(const Frame &frame);
    Frame loadFrame(int frameId, KisTextureTileInfoPoolSP pool);
 
    void moveFrame(int srcFrameId, int dstFrameId);
 
    bool hasFrame(int frameId) const;
    void forgetFrame(int frameId);
 
    static boost::optional<qreal> estimateFrameUniqueness(const Frame &lhs, const Frame &rhs, qreal portion);
    static bool subtractFrames(Frame &dst, const Frame &src);
    static void addFrames(Frame &dst, const Frame &src);
 
private:
    template<template <typename U> class OpPolicy>
    static bool processFrames(KisFrameDataSerializer::Frame &dst, const KisFrameDataSerializer::Frame &src);
 
private:
    Q_DISABLE_COPY(KisFrameDataSerializer)
 
    struct Private;
    const QScopedPointer<Private> m_d;
};
 
#endif // KISFRAMEDATASERIALIZER_H