/****************************************************************************
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** Copyright (C) 2016 The Qt Company Ltd.
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#ifndef QOPENGLPROGRAMBINARYCACHE_P_H
#define QOPENGLPROGRAMBINARYCACHE_P_H

//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API. It exists purely as an
// implementation detail. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//

#include <QtGui/qtguiglobal.h>
#include <QtGui/qopenglshaderprogram.h>
#include <QtCore/qcache.h>
#include <QtCore/qmutex.h>

QT_BEGIN_NAMESPACE

class QOpenGLProgramBinaryCache
{
public:
    struct ShaderDesc {
        ShaderDesc() { }
        ShaderDesc(QOpenGLShader::ShaderType type, const QByteArray &source = QByteArray())
          : type(type), source(source)
        { }
        QOpenGLShader::ShaderType type;
        QByteArray source;
    };
    struct ProgramDesc {
        QVector<ShaderDesc> shaders;
    };

    QOpenGLProgramBinaryCache();

    bool load(const QByteArray &cacheKey, uint programId);
    void save(const QByteArray &cacheKey, uint programId);

private:
    QString cacheFileName(const QByteArray &cacheKey) const;
    bool verifyHeader(const QByteArray &buf) const;
    bool setProgramBinary(uint programId, uint blobFormat, const void *p, uint blobSize);

    QString m_cacheDir;
    bool m_cacheWritable;
    struct MemCacheEntry {
        MemCacheEntry(const void *p, int size, uint format)
          : blob(reinterpret_cast<const char *>(p), size),
            format(format)
        { }
        QByteArray blob;
        uint format;
    };
    QCache<QByteArray, MemCacheEntry> m_memCache;
#if defined(QT_OPENGL_ES_2)
    void (QOPENGLF_APIENTRYP programBinaryOES)(GLuint program, GLenum binaryFormat, const GLvoid *binary, GLsizei length);
    void (QOPENGLF_APIENTRYP getProgramBinaryOES)(GLuint program, GLsizei bufSize, GLsizei *length, GLenum *binaryFormat, GLvoid *binary);
    void initializeProgramBinaryOES(QOpenGLContext *context);
    bool m_programBinaryOESInitialized = false;
#endif
    QMutex m_mutex;
};

QT_END_NAMESPACE

#endif
