Struct CVOpenGLBufferPool

Source

pub struct CVOpenGLBufferPool { /* private fields */ }

Available on crate feature CVOpenGLBufferPool only.

Expand description

Apple’s documentation

Implementations§

Source §

impl CVOpenGLBufferPool

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pub unsafe fn create( allocator: Option<&CFAllocator>, pool_attributes: Option<&CFDictionary>, open_gl_buffer_attributes: Option<&CFDictionary>, pool_out: NonNull<*mut CVOpenGLBufferPool>, ) -> CVReturn

👎Deprecated: OpenGL/OpenGLES is no longer supported. Use Metal APIs instead. (Define COREVIDEO_SILENCE_GL_DEPRECATION to silence these warnings)

Available on crate feature CVReturn only.

Creates a new OpenGL Buffer pool.

Equivalent to CFRelease, but NULL safe

Parameter allocator: The CFAllocatorRef to use for allocating this buffer pool. May be NULL.

Parameter poolAttributes: A CFDictionaryRef containing the attributes to be used for the pool itself.

Parameter openGLBufferAttributes: A CFDictionaryRef containing the attributes to be used for creating new OpenGLBuffers within the pool.

Parameter poolOut: The newly created pool will be placed here

Returns: Returns kCVReturnSuccess on success

§Safety

pool_attributes generics must be of the correct type.
open_gl_buffer_attributes generics must be of the correct type.
pool_out must be a valid pointer.

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pub fn attributes(&self) -> Option<CFRetained<CFDictionary>>

👎Deprecated: OpenGL/OpenGLES is no longer supported. Use Metal APIs instead. (Define COREVIDEO_SILENCE_GL_DEPRECATION to silence these warnings)

Returns the pool attributes dictionary for a CVOpenGLBufferPool

Parameter pool: The CVOpenGLBufferPoolRef to retrieve the attributes from

Returns: Returns the pool attributes dictionary, or NULL on failure.

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pub fn open_gl_buffer_attributes(&self) -> Option<CFRetained<CFDictionary>>

👎Deprecated: OpenGL/OpenGLES is no longer supported. Use Metal APIs instead. (Define COREVIDEO_SILENCE_GL_DEPRECATION to silence these warnings)

Returns the attributes of OpenGL buffers that will be created from this pool.

This function is provided for those cases where you may need to know some information about the buffers that will be created up front.

Parameter pool: The CVOpenGLBufferPoolRef to retrieve the attributes from

Returns: Returns the OpenGL buffer attributes dictionary, or NULL on failure.

Source

pub unsafe fn create_open_gl_buffer( allocator: Option<&CFAllocator>, open_gl_buffer_pool: &CVOpenGLBufferPool, open_gl_buffer_out: NonNull<*mut CVOpenGLBuffer>, ) -> CVReturn

👎Deprecated: OpenGL/OpenGLES is no longer supported. Use Metal APIs instead. (Define COREVIDEO_SILENCE_GL_DEPRECATION to silence these warnings)

Available on crate features CVBuffer and CVImageBuffer and CVOpenGLBuffer and CVReturn only.

Creates a new OpenGLBuffer object from the pool.

The function creates a new CVOpenGLBuffer with the default attachments using the OpenGL buffer attributes specifed during pool creation.

Parameter allocator: The CFAllocatorRef to use for creating the OpenGL buffer. May be NULL.

Parameter openGLBufferPool: The CVOpenGLBufferPool that should create the new CVOpenGLBuffer.

Parameter openGLBufferOut: The newly created OpenGL buffer will be placed here

Returns: Returns kCVReturnSuccess on success

§Safety

open_gl_buffer_out must be a valid pointer.

Methods from Deref<Target = CFType>§

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pub fn downcast_ref<T>(&self) -> Option<&T>
where T: ConcreteType,

Attempt to downcast the type to that of type T.

This is the reference-variant. Use CFRetained::downcast if you want to convert a retained type. See also ConcreteType for more details on which types support being converted to.

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pub fn retain_count(&self) -> usize

Get the reference count of the object.

This function may be useful for debugging. You normally do not use this function otherwise.

Beware that some things (like CFNumbers, small CFStrings etc.) may not have a normal retain count for optimization purposes, and can return usize::MAX in that case.