qquickpixmapcache_p.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QQUICKPIXMAPCACHE_H
#define QQUICKPIXMAPCACHE_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 <QtCore/qcoreapplication.h>
#include <QtCore/qstring.h>
#include <QtGui/qpixmap.h>
#include <QtCore/qurl.h>
#include <private/qtquickglobal_p.h>
#include <QtQuick/qquickimageprovider.h>
 
#include <private/qintrusivelist_p.h>
 
QT_BEGIN_NAMESPACE
 
class QQmlEngine;
class QQuickPixmapData;
class QQuickTextureFactory;
class QQuickImageProviderOptionsPrivate;
 
class QQuickDefaultTextureFactory : public QQuickTextureFactory
{
    Q_OBJECT
public:
    QQuickDefaultTextureFactory(const QImage &i);
    QSGTexture *createTexture(QQuickWindow *window) const override;
    QSize textureSize() const override { return size; }
    int textureByteCount() const override { return size.width() * size.height() * 4; }
    QImage image() const override { return im; }
 
private:
    QImage im;
    QSize size;
};
 
class QQuickImageProviderPrivate
{
public:
    QQuickImageProvider::ImageType type;
    QQuickImageProvider::Flags flags;
    bool isProviderWithOptions;
};
 
// ### Qt 6: Make public moving to qquickimageprovider.h
class Q_QUICK_PRIVATE_EXPORT QQuickImageProviderOptions
{
public:
    enum AutoTransform {
        UsePluginDefaultTransform = -1,
        ApplyTransform = 0,
        DoNotApplyTransform = 1
    };
 
    QQuickImageProviderOptions();
    ~QQuickImageProviderOptions();
 
    QQuickImageProviderOptions(const QQuickImageProviderOptions&);
    QQuickImageProviderOptions& operator=(const QQuickImageProviderOptions&);
 
    bool operator==(const QQuickImageProviderOptions&) const;
 
    AutoTransform autoTransform() const;
    void setAutoTransform(AutoTransform autoTransform);
 
    bool preserveAspectRatioCrop() const;
    void setPreserveAspectRatioCrop(bool preserveAspectRatioCrop);
 
    bool preserveAspectRatioFit() const;
    void setPreserveAspectRatioFit(bool preserveAspectRatioFit);
 
    QColorSpace targetColorSpace() const;
    void setTargetColorSpace(const QColorSpace &colorSpace);
 
private:
    QSharedDataPointer<QQuickImageProviderOptionsPrivate> d;
};
 
class Q_QUICK_PRIVATE_EXPORT QQuickPixmap
{
    Q_DECLARE_TR_FUNCTIONS(QQuickPixmap)
public:
    QQuickPixmap();
    QQuickPixmap(QQmlEngine *, const QUrl &);
    QQuickPixmap(QQmlEngine *, const QUrl &, const QRect &region, const QSize &);
    QQuickPixmap(const QUrl &, const QImage &image);
    ~QQuickPixmap();
 
    enum Status { Null, Ready, Error, Loading };
 
    enum Option {
        Asynchronous = 0x00000001,
        Cache        = 0x00000002
    };
    Q_DECLARE_FLAGS(Options, Option)
 
    bool isNull() const;
    bool isReady() const;
    bool isError() const;
    bool isLoading() const;
 
    Status status() const;
    QString error() const;
    const QUrl &url() const;
    const QSize &implicitSize() const;
    const QRect &requestRegion() const;
    const QSize &requestSize() const;
    QQuickImageProviderOptions::AutoTransform autoTransform() const;
    int frameCount() const;
    QImage image() const;
    void setImage(const QImage &);
    void setPixmap(const QQuickPixmap &other);
 
    QColorSpace colorSpace() const;
 
    QQuickTextureFactory *textureFactory() const;
 
    QRect rect() const;
    int width() const;
    int height() const;
 
    void load(QQmlEngine *, const QUrl &);
    void load(QQmlEngine *, const QUrl &, QQuickPixmap::Options options);
    void load(QQmlEngine *, const QUrl &, const QRect &requestRegion, const QSize &requestSize);
    void load(QQmlEngine *, const QUrl &, const QRect &requestRegion, const QSize &requestSize, QQuickPixmap::Options options);
    void load(QQmlEngine *, const QUrl &, const QRect &requestRegion, const QSize &requestSize,
              QQuickPixmap::Options options, const QQuickImageProviderOptions &providerOptions, int frame = 0, int frameCount = 1,
              qreal devicePixelRatio = 1.0);
    void loadImageFromDevice(QQmlEngine *engine, QIODevice *device, const QUrl &url,
                             const QRect &requestRegion, const QSize &requestSize,
                             const QQuickImageProviderOptions &providerOptions, int frame = 0, int frameCount = 1);
 
    void clear();
    void clear(QObject *);
 
    bool connectFinished(QObject *, const char *);
    bool connectFinished(QObject *, int);
    bool connectDownloadProgress(QObject *, const char *);
    bool connectDownloadProgress(QObject *, int);
 
    static void purgeCache();
    static bool isCached(const QUrl &url, const QRect &requestRegion, const QSize &requestSize,
                         const int frame, const QQuickImageProviderOptions &options);
 
    static const QLatin1String itemGrabberScheme;
 
private:
    Q_DISABLE_COPY(QQuickPixmap)
    QQuickPixmapData *d;
    QIntrusiveListNode dataListNode;
    friend class QQuickPixmapData;
};
 
Q_DECLARE_OPERATORS_FOR_FLAGS(QQuickPixmap::Options)
 
// ### Qt 6: This should be made public in Qt 6. It's functionality can't be merged into
// QQuickImageProvider without breaking source compatibility.
class Q_QUICK_PRIVATE_EXPORT QQuickImageProviderWithOptions : public QQuickAsyncImageProvider
{
public:
    QQuickImageProviderWithOptions(ImageType type, Flags flags = Flags());
 
    QImage requestImage(const QString &id, QSize *size, const QSize& requestedSize) override;
    QPixmap requestPixmap(const QString &id, QSize *size, const QSize& requestedSize) override;
    QQuickTextureFactory *requestTexture(const QString &id, QSize *size, const QSize &requestedSize) override;
    QQuickImageResponse *requestImageResponse(const QString &id, const QSize &requestedSize) override;
 
    virtual QImage requestImage(const QString &id, QSize *size, const QSize& requestedSize, const QQuickImageProviderOptions &options);
    virtual QPixmap requestPixmap(const QString &id, QSize *size, const QSize& requestedSize, const QQuickImageProviderOptions &options);
    virtual QQuickTextureFactory *requestTexture(const QString &id, QSize *size, const QSize &requestedSize, const QQuickImageProviderOptions &options);
    virtual QQuickImageResponse *requestImageResponse(const QString &id, const QSize &requestedSize, const QQuickImageProviderOptions &options);
 
    static QSize loadSize(const QSize &originalSize, const QSize &requestedSize, const QByteArray &format, const QQuickImageProviderOptions &options,
                          qreal devicePixelRatio = 1.0);
    static QQuickImageProviderWithOptions *checkedCast(QQuickImageProvider *provider);
};
 
QT_END_NAMESPACE
 
#endif // QQUICKPIXMAPCACHE_H