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39
40#ifndef QSGRHISUPPORT_P_H
41#define QSGRHISUPPORT_P_H
42
43//
44// W A R N I N G
45// -------------
46//
47// This file is not part of the Qt API. It exists purely as an
48// implementation detail. This header file may change from version to
49// version without notice, or even be removed.
50//
51// We mean it.
52//
53
54#include "qsgrenderloop_p.h"
55#include "qsgrendererinterface.h"
56
57#include <QtGui/private/qrhi_p.h>
58
59#include <QtGui/private/qrhinull_p.h>
60
61#if QT_CONFIG(opengl)
62#include <QtGui/private/qrhigles2_p.h>
63#endif
64
65#if QT_CONFIG(vulkan)
66#include <QtGui/private/qrhivulkan_p.h>
67#endif
68
69#ifdef Q_OS_WIN
70#include <QtGui/private/qrhid3d11_p.h>
71#endif
72
73#if defined(Q_OS_MACOS) || defined(Q_OS_IOS)
74#include <QtGui/private/qrhimetal_p.h>
75#endif
76
77#if QT_CONFIG(qml_network)
78#define RHI_REMOTE_PROFILER
79#include <QtCore/qelapsedtimer.h>
80#include <QtCore/qscopedpointer.h>
81#include <QtNetwork/qtcpsocket.h>
82#include <QtGui/private/qrhiprofiler_p.h>
83#endif
84
85QT_BEGIN_NAMESPACE
86
87class QSGDefaultRenderContext;
88class QVulkanInstance;
89class QOffscreenSurface;
90
91// Opting in/out of QRhi and choosing the default/requested backend is managed
92// by this singleton. This is because this information may be needed before
93// creating a render loop. A well-written render loop sets up its QRhi and
94// related machinery based on the settings queriable from here.
95//
96// cleanup() must be called to perform global (not per thread) cleanup, such
97// as, destroying the QVulkanInstance (if one was created in vulkanInstance()).
98//
99// In addition, the class provides handy conversion and query stuff for the
100// renderloop and the QSGRendererInterface implementations.
101//
102class QSGRhiSupport
103{
104public:
105 static void configure(QSGRendererInterface::GraphicsApi api);
106 static QSGRhiSupport *instance();
107 static QVulkanInstance *vulkanInstance();
108 void cleanup();
109
110 bool isRhiEnabled() const { return m_enableRhi; }
111 QRhi::Implementation rhiBackend() const { return m_rhiBackend; }
112 QString rhiBackendName() const;
113 QSGRendererInterface::GraphicsApi graphicsApi() const;
114
115 bool isDebugLayerRequested() const { return m_debugLayer; }
116 bool isProfilingRequested() const { return m_profile; }
117 bool isShaderEffectDebuggingRequested() const { return m_shaderEffectDebug; }
118 bool isSoftwareRendererRequested() const { return m_preferSoftwareRenderer; }
119
120 QSurface::SurfaceType windowSurfaceType() const;
121
122 const void *rifResource(QSGRendererInterface::Resource res, const QSGDefaultRenderContext *rc);
123
124 int chooseSampleCountForWindowWithRhi(QWindow *window, QRhi *rhi);
125
126 QOffscreenSurface *maybeCreateOffscreenSurface(QWindow *window);
127 QRhi *createRhi(QWindow *window, QOffscreenSurface *offscreenSurface);
128
129 QImage grabAndBlockInCurrentFrame(QRhi *rhi, QRhiSwapChain *swapchain);
130
131 static void checkEnvQSgInfo();
132
133private:
134 QSGRhiSupport();
135 void applySettings();
136 static QSGRhiSupport *staticInst();
137 struct {
138 bool valid = false;
139 QSGRendererInterface::GraphicsApi api;
140 uint rhi : 1;
141 } m_requested;
142 QRhi::Implementation m_rhiBackend = QRhi::Null;
143 int m_killDeviceFrameCount;
144 uint m_set : 1;
145 uint m_enableRhi : 1;
146 uint m_debugLayer : 1;
147 uint m_profile : 1;
148 uint m_shaderEffectDebug : 1;
149 uint m_preferSoftwareRenderer : 1;
150};
151
152// Sends QRhi resource statistics over a QTcpSocket. To be initialized by the
153// renderloop when QSGRhiSupport::isProfilingRequested() is true. Will not do
154// anything unless extra env vars (QSG_RHI_PROFILE_HOST) are set.
155class QSGRhiProfileConnection
156{
157public:
158 static QSGRhiProfileConnection *instance();
159 void initialize(QRhi *rhi);
160 void cleanup();
161 void send(QRhi *rhi);
162
163private:
164#ifdef RHI_REMOTE_PROFILER
165 QScopedPointer<QTcpSocket> m_profConn;
166 QElapsedTimer m_lastMemStatWrite;
167#endif
168};
169
170QT_END_NAMESPACE
171
172#endif // QSGRHISUPPORT_P_H
173

source code of qtdeclarative/src/quick/scenegraph/qsgrhisupport_p.h