QWaylandBufferRef class holds the reference to a surface buffer 更多...
| 头： | #include <QWaylandBufferRef> |
| qmake: | QT += waylandcompositor |
| Since: | Qt 5.8 |
| enum | BufferFormatEgl { BufferFormatEgl_Null, BufferFormatEgl_RGB, BufferFormatEgl_RGBA, BufferFormatEgl_EXTERNAL_OES, ..., BufferFormatEgl_Y_XUXV } |
| enum | BufferType { BufferType_Null, BufferType_SharedMemory, BufferType_Egl } |
| QWaylandBufferRef () | |
| QWaylandBufferRef (const QWaylandBufferRef & ref ) | |
| ~QWaylandBufferRef () | |
| BufferFormatEgl | bufferFormatEgl () const |
| BufferType | bufferType () const |
| 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 ) |
| bool | operator!= (const QWaylandBufferRef & ref ) |
| QWaylandBufferRef & | operator= (const QWaylandBufferRef & ref ) |
| bool | operator== (const QWaylandBufferRef & ref ) |
QWaylandBufferRef class holds the reference to a surface buffer
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.
构造 null 缓冲 ref 引用。
Creates a new reference to the buffer referenced by ref .
解引用缓冲。
返回 true，若此 QWaylandBufferRef 引用缓冲。否则返回 false。
另请参阅 isNull () 和 hasContent ().
返回 true，若此 QWaylandBufferRef references a buffer that has content. Otherwise returns false.
另请参阅 isNull () 和 hasBuffer ().
Returns an image with the contents of the buffer.
返回 true，若此 QWaylandBufferRef references a buffer that has been destroyed. Otherwise returns false.
返回 true，若此 QWaylandBufferRef does not reference a buffer. Otherwise returns false.
另请参阅 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 () 被调用。
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 被返回。
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.
返回
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 ().
返回 false，若此 QWaylandBufferRef 引用相同缓冲如 ref 。否则返回 true。
赋值 ref to this buffer and adds a reference to it. The previously referenced buffer is dereferenced.
返回 true，若此 QWaylandBufferRef 引用相同缓冲如 ref 。否则返回 false。
