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// Copyright (C) 2019 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 QSGRHISUPPORT_P_H
#define QSGRHISUPPORT_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 "qsgrenderloop_p.h"
#include "qsgrendererinterface.h"
#include <rhi/qrhi.h>
QT_BEGIN_NAMESPACE
class QSGDefaultRenderContext;
class QOffscreenSurface;
class QQuickGraphicsConfiguration;
// Opting in/out of QRhi and choosing the default/requested backend is managed
// by this singleton. This is because this information may be needed before
// creating a render loop. A well-written render loop sets up its QRhi and
// related machinery using the helper functions in here.
//
// In addition, the class provides handy conversion and query stuff for the
// renderloop and the QSGRendererInterface implementations.
//
class Q_QUICK_EXPORT QSGRhiSupport
{
public:
static QSGRhiSupport *instance_internal();
static QSGRhiSupport *instance();
static int chooseSampleCount(int samples, QRhi *rhi);
static int chooseSampleCountForWindowWithRhi(QWindow *window, QRhi *rhi);
static QImage grabAndBlockInCurrentFrame(QRhi *rhi, QRhiCommandBuffer *cb, QRhiTexture *src = nullptr);
static void checkEnvQSgInfo();
#if QT_CONFIG(opengl)
static QRhiTexture::Format toRhiTextureFormatFromGL(uint format, QRhiTexture::Flags *flags);
#endif
#if QT_CONFIG(vulkan)
static QRhiTexture::Format toRhiTextureFormatFromVulkan(uint format, QRhiTexture::Flags *flags);
#endif
#if defined(Q_OS_WIN)
static QRhiTexture::Format toRhiTextureFormatFromDXGI(uint format, QRhiTexture::Flags *flags);
#endif
#if QT_CONFIG(metal)
static QRhiTexture::Format toRhiTextureFormatFromMetal(uint format, QRhiTexture::Flags *flags);
#endif
void configure(QSGRendererInterface::GraphicsApi api);
QRhi::Implementation rhiBackend() const { return m_rhiBackend; }
QString rhiBackendName() const;
QSGRendererInterface::GraphicsApi graphicsApi() const;
QSurface::SurfaceType windowSurfaceType() const;
const void *rifResource(QSGRendererInterface::Resource res,
const QSGDefaultRenderContext *rc,
const QQuickWindow *w);
QOffscreenSurface *maybeCreateOffscreenSurface(QWindow *window);
struct RhiCreateResult {
QRhi *rhi;
bool own;
};
RhiCreateResult createRhi(QQuickWindow *window, QSurface *offscreenSurface, bool forcePreferSwRenderer = false);
void destroyRhi(QRhi *rhi, const QQuickGraphicsConfiguration &config);
void prepareWindowForRhi(QQuickWindow *window);
QImage grabOffscreen(QQuickWindow *window);
#ifdef Q_OS_WEBOS
QImage grabOffscreenForProtectedContent(QQuickWindow *window);
#endif
void applySwapChainFormat(QRhiSwapChain *scWithWindowSet, QQuickWindow *window);
QRhiTexture::Format toRhiTextureFormat(uint nativeFormat, QRhiTexture::Flags *flags) const;
bool attemptReinitWithSwRastUponFail() const;
private:
QSGRhiSupport();
void applySettings();
void adjustToPlatformQuirks();
void preparePipelineCache(QRhi *rhi, QQuickWindow *window);
void finalizePipelineCache(QRhi *rhi, const QQuickGraphicsConfiguration &config);
struct {
bool valid = false;
QSGRendererInterface::GraphicsApi api;
} m_requested;
bool m_settingsApplied = false;
QRhi::Implementation m_rhiBackend = QRhi::Null;
};
QT_END_NAMESPACE
#endif // QSGRHISUPPORT_P_H
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