psd_layer_section.h

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/*
 *  SPDX-FileCopyrightText: 2009 Boudewijn Rempt <boud@valdyas.org>
 *  SPDX-FileCopyrightText: 2021 L. E. Segovia <amy@amyspark.me>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
#ifndef PSD_LAYER_SECTION_H
#define PSD_LAYER_SECTION_H
 
#include "kritapsd_export.h"
 
#include <QString>
 
class QIODevice;
 
#include <kis_types.h>
#include <psd.h>
 
#include "psd_header.h"
#include "psd_layer_record.h"
 
class KRITAPSD_EXPORT PSDLayerMaskSection
{
public:
    PSDLayerMaskSection(const PSDHeader &header);
    ~PSDLayerMaskSection();
 
    bool read(QIODevice &io);
    bool write(QIODevice &io, KisNodeSP rootLayer, psd_compression_type compressionType);
 
    QString error;
 
    // layer info: https://www.adobe.com/devnet-apps/photoshop/fileformatashtml/#50577409_16000
    bool hasTransparency{false};
 
    qint16 nLayers{0}; // If layer count is a negative number, its absolute value is the number of layers and the first alpha channel contains the transparency
                       // data for the merged result.
    QVector<PSDLayerRecord *> layers;
 
    // mask info: https://www.adobe.com/devnet-apps/photoshop/fileformatashtml/#50577409_17115
    struct GlobalLayerMaskInfo {
        quint16 overlayColorSpace{0}; // Overlay color space (undocumented).
        quint16 colorComponents[4]{0, 0, 0, 0}; // 4 * 2 byte color components
        quint16 opacity{0}; // Opacity. 0 = transparent, 100 = opaque.
        quint8 kind{0}; // Kind. 0 = Color selected--i.e. inverted; 1 = Color protected;128 = use value stored per layer. This value is preferred. The others
                        // are for backward compatibility with beta versions.
    };
    GlobalLayerMaskInfo globalLayerMaskInfo;
    PsdAdditionalLayerInfoBlock globalInfoSection;
 
private:
    template<psd_byte_order byteOrder = psd_byte_order::psdBigEndian>
    bool readLayerInfoImpl(QIODevice &io);
    bool readPsdImpl(QIODevice &io);
    template<psd_byte_order byteOrder = psd_byte_order::psdBigEndian>
    bool readTiffImpl(QIODevice &io);
    template<psd_byte_order byteOrder = psd_byte_order::psdBigEndian>
    bool readGlobalMask(QIODevice &io);
    void writePsdImpl(QIODevice &io, KisNodeSP rootLayer, psd_compression_type compressionType);
    template<psd_byte_order byteOrder = psd_byte_order::psdBigEndian>
    void writeTiffImpl(QIODevice &io, KisNodeSP rootLayer, psd_compression_type compressionType);
private:
    const PSDHeader m_header;
};
 
#endif // PSD_LAYER_SECTION_H