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39
40#include "qsurface.h"
41#include "qopenglcontext.h"
42#include <qpa/qplatformintegration.h>
43#include <QtGui/private/qguiapplication_p.h>
44
45QT_BEGIN_NAMESPACE
46
47
48/*!
49 \class QSurface
50 \inmodule QtGui
51 \since 5.0
52 \brief The QSurface class is an abstraction of renderable surfaces in Qt.
53
54 The size of the surface is accessible with the size() function. The rendering
55 specific attributes of the surface are accessible through the format() function.
56 */
57
58
59/*!
60 \enum QSurface::SurfaceClass
61
62 The SurfaceClass enum describes the actual subclass of the surface.
63
64 \value Window The surface is an instance of QWindow.
65 \value Offscreen The surface is an instance of QOffscreenSurface.
66 */
67
68
69/*!
70 \enum QSurface::SurfaceType
71
72 The SurfaceType enum describes what type of surface this is.
73
74 \value RasterSurface The surface is is composed of pixels and can be rendered to using
75 a software rasterizer like Qt's raster paint engine.
76 \value OpenGLSurface The surface is an OpenGL compatible surface and can be used
77 in conjunction with QOpenGLContext.
78 \value RasterGLSurface The surface can be rendered to using a software rasterizer,
79 and also supports OpenGL. This surface type is intended for internal Qt use, and
80 requires the use of private API.
81 \value OpenVGSurface The surface is an OpenVG compatible surface and can be used
82 in conjunction with OpenVG contexts.
83 \value VulkanSurface The surface is a Vulkan compatible surface and can be used
84 in conjunction with the Vulkan graphics API.
85 \value MetalSurface The surface is a Metal compatible surface and can be used
86 in conjunction with Apple's Metal graphics API. This surface type is supported
87 on macOS only.
88
89 */
90
91
92/*!
93 \fn QSurfaceFormat QSurface::format() const
94
95 Returns the format of the surface.
96 */
97
98/*!
99 Returns true if the surface is OpenGL compatible and can be used in
100 conjunction with QOpenGLContext; otherwise returns false.
101
102 \since 5.3
103*/
104
105bool QSurface::supportsOpenGL() const
106{
107 SurfaceType type = surfaceType();
108 if (type == RasterSurface) {
109 QPlatformIntegration *integ = QGuiApplicationPrivate::instance()->platformIntegration();
110 return integ->hasCapability(cap: QPlatformIntegration::OpenGLOnRasterSurface);
111 }
112 return type == OpenGLSurface || type == RasterGLSurface;
113}
114
115/*!
116 \fn QPlatformSurface *QSurface::surfaceHandle() const
117
118 Returns a handle to the platform-specific implementation of the surface.
119 */
120
121/*!
122 \fn SurfaceType QSurface::surfaceType() const
123
124 Returns the type of the surface.
125 */
126
127/*!
128 \fn QSize QSurface::size() const
129
130 Returns the size of the surface in pixels.
131 */
132
133/*!
134 Creates a surface with the given \a type.
135*/
136QSurface::QSurface(SurfaceClass type)
137 : m_type(type), m_reserved(nullptr)
138{
139}
140
141/*!
142 Destroys the surface.
143*/
144QSurface::~QSurface()
145{
146#ifndef QT_NO_OPENGL
147 QOpenGLContext *context = QOpenGLContext::currentContext();
148 if (context && context->surface() == this)
149 context->doneCurrent();
150#endif
151}
152
153/*!
154 Returns the surface class of this surface.
155 */
156QSurface::SurfaceClass QSurface::surfaceClass() const
157{
158 return m_type;
159}
160
161QT_END_NAMESPACE
162
163

source code of qtbase/src/gui/kernel/qsurface.cpp