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39
40#ifndef QPLATFORMSHAREDGRAPHICSCACHE_H
41#define QPLATFORMSHAREDGRAPHICSCACHE_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is part of the QPA API and is not meant to be used
48// in applications. Usage of this API may make your code
49// source and binary incompatible with future versions of Qt.
50//
51
52#include <QtGui/qtguiglobal.h>
53#include <QtCore/qobject.h>
54#include <QtGui/qimage.h>
55
56QT_BEGIN_NAMESPACE
57
58class Q_GUI_EXPORT QPlatformSharedGraphicsCache: public QObject
59{
60 Q_OBJECT
61public:
62 enum PixelFormat
63 {
64 Alpha8
65 };
66
67 enum BufferType
68 {
69 OpenGLTexture
70 };
71
72 explicit QPlatformSharedGraphicsCache(QObject *parent = nullptr) : QObject(parent) {}
73
74 virtual void beginRequestBatch() = 0;
75 virtual void ensureCacheInitialized(const QByteArray &cacheId, BufferType bufferType,
76 PixelFormat pixelFormat) = 0;
77 virtual void requestItems(const QByteArray &cacheId, const QVector<quint32> &itemIds) = 0;
78 virtual void insertItems(const QByteArray &cacheId,
79 const QVector<quint32> &itemIds,
80 const QVector<QImage> &items) = 0;
81 virtual void releaseItems(const QByteArray &cacheId, const QVector<quint32> &itemIds) = 0;
82 virtual void endRequestBatch() = 0;
83
84 virtual bool requestBatchStarted() const = 0;
85
86 virtual uint textureIdForBuffer(void *bufferId) = 0;
87 virtual void referenceBuffer(void *bufferId) = 0;
88 virtual bool dereferenceBuffer(void *bufferId) = 0;
89 virtual QSize sizeOfBuffer(void *bufferId) = 0;
90 virtual void *eglImageForBuffer(void *bufferId) = 0;
91
92Q_SIGNALS:
93 void itemsMissing(const QByteArray &cacheId, const QVector<quint32> &itemIds);
94 void itemsAvailable(const QByteArray &cacheId, void *bufferId,
95 const QVector<quint32> &itemIds, const QVector<QPoint> &positionsInBuffer);
96 void itemsInvalidated(const QByteArray &cacheId, const QVector<quint32> &itemIds);
97 void itemsUpdated(const QByteArray &cacheId, void *bufferId,
98 const QVector<quint32> &itemIds, const QVector<QPoint> &positionsInBuffer);
99};
100
101QT_END_NAMESPACE
102
103#endif // QPLATFORMSHAREDGRAPHICSCACHE_H
104

source code of qtbase/src/gui/kernel/qplatformsharedgraphicscache.h