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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 QPLATFORMBACKINGSTORE_H
#define QPLATFORMBACKINGSTORE_H
//
// W A R N I N G
// -------------
//
// This file is part of the QPA API and is not meant to be used
// in applications. Usage of this API may make your code
// source and binary incompatible with future versions of Qt.
//
#include <QtGui/qtguiglobal.h>
#include <QtCore/qloggingcategory.h>
#include <QtCore/qrect.h>
#include <QtCore/qobject.h>
#include <QtGui/qwindow.h>
#include <QtGui/qregion.h>
QT_BEGIN_NAMESPACE
Q_DECLARE_EXPORTED_LOGGING_CATEGORY(lcQpaBackingStore, Q_GUI_EXPORT)
class QRegion;
class QRect;
class QPoint;
class QImage;
class QPlatformBackingStorePrivate;
class QPlatformTextureList;
class QPlatformTextureListPrivate;
class QPlatformGraphicsBuffer;
class QRhi;
class QRhiTexture;
class QRhiResourceUpdateBatch;
struct Q_GUI_EXPORT QPlatformBackingStoreRhiConfig
{
enum Api {
OpenGL,
Metal,
Vulkan,
D3D11,
D3D12,
Null
};
QPlatformBackingStoreRhiConfig()
: m_enable(false)
{ }
QPlatformBackingStoreRhiConfig(Api api)
: m_enable(true),
m_api(api)
{ }
bool isEnabled() const { return m_enable; }
void setEnabled(bool enable) { m_enable = enable; }
Api api() const { return m_api; }
void setApi(Api api) { m_api = api; }
bool isDebugLayerEnabled() const { return m_debugLayer; }
void setDebugLayer(bool enable) { m_debugLayer = enable; }
private:
bool m_enable;
Api m_api = Null;
bool m_debugLayer = false;
friend bool operator==(const QPlatformBackingStoreRhiConfig &a, const QPlatformBackingStoreRhiConfig &b);
};
inline bool operator==(const QPlatformBackingStoreRhiConfig &a, const QPlatformBackingStoreRhiConfig &b)
{
return a.m_enable == b.m_enable
&& a.m_api == b.m_api
&& a.m_debugLayer == b.m_debugLayer;
}
inline bool operator!=(const QPlatformBackingStoreRhiConfig &a, const QPlatformBackingStoreRhiConfig &b)
{
return !(a == b);
}
class Q_GUI_EXPORT QPlatformTextureList : public QObject
{
Q_OBJECT
Q_DECLARE_PRIVATE(QPlatformTextureList)
public:
enum Flag {
StacksOnTop = 0x01,
TextureIsSrgb = 0x02,
NeedsPremultipliedAlphaBlending = 0x04,
MirrorVertically = 0x08
};
Q_DECLARE_FLAGS(Flags, Flag)
explicit QPlatformTextureList(QObject *parent = nullptr);
~QPlatformTextureList();
int count() const;
bool isEmpty() const { return count() == 0; }
QRhiTexture *texture(int index) const;
QRhiTexture *textureExtra(int index) const;
QRect geometry(int index) const;
QRect clipRect(int index) const;
void *source(int index);
Flags flags(int index) const;
void lock(bool on);
bool isLocked() const;
void appendTexture(void *source, QRhiTexture *texture, const QRect &geometry,
const QRect &clipRect = QRect(), Flags flags = { });
void appendTexture(void *source, QRhiTexture *textureLeft, QRhiTexture *textureRight, const QRect &geometry,
const QRect &clipRect = QRect(), Flags flags = { });
void clear();
Q_SIGNALS:
void locked(bool);
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QPlatformTextureList::Flags)
class Q_GUI_EXPORT QPlatformBackingStore
{
public:
enum FlushResult {
FlushSuccess,
FlushFailed,
FlushFailedDueToLostDevice
};
explicit QPlatformBackingStore(QWindow *window);
virtual ~QPlatformBackingStore();
QWindow *window() const;
QBackingStore *backingStore() const;
virtual QPaintDevice *paintDevice() = 0;
virtual void flush(QWindow *window, const QRegion ®ion, const QPoint &offset);
virtual FlushResult rhiFlush(QWindow *window,
qreal sourceDevicePixelRatio,
const QRegion ®ion,
const QPoint &offset,
QPlatformTextureList *textures,
bool translucentBackground);
virtual QImage toImage() const;
enum TextureFlag {
TextureSwizzle = 0x01,
TextureFlip = 0x02,
TexturePremultiplied = 0x04
};
Q_DECLARE_FLAGS(TextureFlags, TextureFlag)
virtual QRhiTexture *toTexture(QRhiResourceUpdateBatch *resourceUpdates,
const QRegion &dirtyRegion,
TextureFlags *flags) const;
virtual QPlatformGraphicsBuffer *graphicsBuffer() const;
virtual void resize(const QSize &size, const QRegion &staticContents) = 0;
virtual bool scroll(const QRegion &area, int dx, int dy);
virtual void beginPaint(const QRegion &);
virtual void endPaint();
void setRhiConfig(const QPlatformBackingStoreRhiConfig &config);
QRhi *rhi() const;
void surfaceAboutToBeDestroyed();
void graphicsDeviceReportedLost();
private:
QPlatformBackingStorePrivate *d_ptr;
void setBackingStore(QBackingStore *);
friend class QBackingStore;
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QPlatformBackingStore::TextureFlags)
QT_END_NAMESPACE
#endif // QPLATFORMBACKINGSTORE_H
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