QWaylandBufferRef 類保持對錶麵緩衝的引用。 更多...
| 頭： | #include <QWaylandBufferRef> |
| qmake: | QT += waylandcompositor |
| Since: | Qt 5.8 |
該類在 Qt 5.8 引入。
| QWaylandBufferRef (const QWaylandBufferRef & ref ) | |
| QWaylandBufferRef () | |
| QWaylandBufferRef & | operator= (const QWaylandBufferRef & ref ) |
| ~QWaylandBufferRef () | |
| bool | hasBuffer () const |
| bool | hasContent () const |
| QImage | image () const |
| bool | isDestroyed () const |
| bool | isNull () const |
| bool | isSharedMemory () const |
| quintptr | lockNativeBuffer () |
| QWaylandSurface::Origin | origin () const |
| QSize | size () const |
| QOpenGLTexture * | toOpenGLTexture (int plane = 0) const |
| void | unlockNativeBuffer (quintptr handle ) |
| struct wl_resource * | wl_buffer () const |
| bool | operator!= (const QWaylandBufferRef & ref ) |
| bool | operator== (const QWaylandBufferRef & ref ) |
This class can be used to reference a surface buffer. As long as a reference to the buffer exists, it is owned by the compositor and the client cannot modify it.
Creates a new reference to the buffer referenced by ref .
構造 null 緩衝 ref 引用。
賦值 ref to this buffer and adds a reference to it. The previously referenced buffer is dereferenced.
解引用緩衝。
返迴 true，若此 QWaylandBufferRef 引用緩衝。否則返迴 false。
另請參閱 isNull () 和 hasContent ().
返迴 true，若此 QWaylandBufferRef references a buffer that has content. Otherwise returns false.
另請參閱 isNull () 和 hasBuffer ().
Returns an image with the contents of the buffer.
返迴 true，若此 QWaylandBufferRef references a buffer that has been destroyed. Otherwise returns false.
返迴 true，若此 QWaylandBufferRef does not reference a buffer. Otherwise returns false.
另請參閱 hasBuffer () 和 hasContent ().
Returns true if the buffer is a shared memory buffer. Otherwise returns false.
Returns the native handle for this buffer, and marks it as locked so it will not be released until unlockNativeBuffer () 被調用。
Returns 0 if there is no native handle for this buffer, or if the lock was unsuccessful.
Returns the origin of the buffer. If the buffer referenced is null, QWaylandSurface::OriginBottomLeft 被返迴。
Returns the size of the buffer. If the buffer referenced is null, an invalid QSize() is returned.
Returns an OpenGL texture for the buffer. plane is the index for multi-plane formats, such as YUV.
The returned texture is owned by the buffer. The texture is only valid for as long as the buffer reference exists. The caller of this function must not delete the texture, and must keep a reference to the buffer for as long as the texture is being used.
返迴
nullptr
if there is no valid buffer, or if no texture can be created.
Marks the native buffer as no longer in use. handle must correspond to the value returned by a previous call to lockNativeBuffer ().
返迴用於緩衝的 Wayland 資源。
返迴 false，若此 QWaylandBufferRef 引用相同緩衝如 ref 。否則返迴 true。
返迴 true，若此 QWaylandBufferRef 引用相同緩衝如 ref 。否則返迴 false。
