Struct nannou::ui::backend::glium::glium::index::IndexBufferSlice [−][src]
pub struct IndexBufferSlice<'a, T> where
T: 'a + Index, { /* fields omitted */ }
Slice of an IndexBuffer
.
Methods
impl<'a, T> IndexBufferSlice<'a, T> where
T: 'a + Index,
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impl<'a, T> IndexBufferSlice<'a, T> where
T: 'a + Index,
pub fn get_primitives_type(&self) -> PrimitiveType
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pub fn get_primitives_type(&self) -> PrimitiveType
Returns the type of primitives associated with this index buffer.
pub fn get_indices_type(&self) -> IndexType
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pub fn get_indices_type(&self) -> IndexType
Returns the data type of the indices inside this index buffer.
pub fn slice<R>(&self, range: R) -> Option<IndexBufferSlice<'a, T>> where
R: RangeArgument<usize>,
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pub fn slice<R>(&self, range: R) -> Option<IndexBufferSlice<'a, T>> where
R: RangeArgument<usize>,
Returns None
if out of range.
Methods from Deref<Target = BufferSlice<'a, [T]>>
pub fn get_size(&self) -> usize
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pub fn get_size(&self) -> usize
Returns the size in bytes of this slice.
pub fn get_context(&self) -> &Rc<Context>
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pub fn get_context(&self) -> &Rc<Context>
Returns the context corresponding to this buffer.
pub fn write(&self, data: &T)
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pub fn write(&self, data: &T)
Uploads some data in this buffer.
Implementation
- For persistent-mapped buffers, waits untils the data is no longer used by the GPU then memcpies the data to the mapping.
- For immutable buffers, creates a temporary buffer that contains the data then calls
glCopyBufferSubData
to copy from the temporary buffer to the real one. - For other types, calls
glBufferSubData
.
Panic
Panics if the length of data
is different from the length of this buffer.
pub fn invalidate(&self)
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pub fn invalidate(&self)
Invalidates the content of the slice. The data becomes undefined.
This operation is a no-op if the backend doesn't support it and for persistent-mapped buffers.
Implementation
Calls glInvalidateBufferSubData
if supported.
pub fn read(&self) -> Result<<T as Content>::Owned, ReadError>
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pub fn read(&self) -> Result<<T as Content>::Owned, ReadError>
Reads the content of the buffer.
pub fn copy_to<S>(&self, target: S) -> Result<(), CopyError> where
S: Into<BufferSlice<'a, T>>,
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pub fn copy_to<S>(&self, target: S) -> Result<(), CopyError> where
S: Into<BufferSlice<'a, T>>,
Copies the content of this slice to another slice.
Panic
Panics if T
is unsized and the other buffer is too small.
pub unsafe fn slice_custom<F, R>(&self, f: F) -> BufferSlice<'a, R> where
F: for<'r> FnOnce(&'r T) -> &'r R,
R: Content + ?Sized,
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pub unsafe fn slice_custom<F, R>(&self, f: F) -> BufferSlice<'a, R> where
F: for<'r> FnOnce(&'r T) -> &'r R,
R: Content + ?Sized,
Builds a slice that contains an element from inside the buffer.
This method builds an object that represents a slice of the buffer. No actual operation OpenGL is performed.
Example
#[derive(Copy, Clone)] struct BufferContent { value1: u16, value2: u16, } let slice = unsafe { buffer.slice_custom(|content| &content.value2) };
Safety
The object whose reference is passed to the closure is uninitialized. Therefore you must not access the content of the object.
You must return a reference to an element from the parameter. The closure must not panic.
pub fn as_slice_any(&self) -> BufferAnySlice<'a>
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pub fn as_slice_any(&self) -> BufferAnySlice<'a>
Builds a slice-any containing the whole subbuffer.
This method builds an object that represents a slice of the buffer. No actual operation OpenGL is performed.
pub fn len(&self) -> usize
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pub fn len(&self) -> usize
Returns the number of elements in this slice.
pub fn slice<R>(&self, range: R) -> Option<BufferSlice<'a, [T]>> where
R: RangeArgument<usize>,
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pub fn slice<R>(&self, range: R) -> Option<BufferSlice<'a, [T]>> where
R: RangeArgument<usize>,
Builds a subslice of this slice. Returns None
if out of range.
This method builds an object that represents a slice of the buffer. No actual operation OpenGL is performed.
pub fn read_as_texture_1d<S>(&self) -> Result<S, ReadError> where
S: Texture1dDataSink<T>,
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pub fn read_as_texture_1d<S>(&self) -> Result<S, ReadError> where
S: Texture1dDataSink<T>,
Reads the content of the buffer.
Trait Implementations
impl<'a, T> DerefMut for IndexBufferSlice<'a, T> where
T: Index,
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impl<'a, T> DerefMut for IndexBufferSlice<'a, T> where
T: Index,
fn deref_mut(&mut self) -> &mut BufferSlice<'a, [T]>
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fn deref_mut(&mut self) -> &mut BufferSlice<'a, [T]>
Mutably dereferences the value.
impl<'a, T> Debug for IndexBufferSlice<'a, T> where
T: 'a + Debug + Index,
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impl<'a, T> Debug for IndexBufferSlice<'a, T> where
T: 'a + Debug + Index,
fn fmt(&self, f: &mut Formatter) -> Result<(), Error>
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fn fmt(&self, f: &mut Formatter) -> Result<(), Error>
Formats the value using the given formatter. Read more
impl<'a, T> From<IndexBufferSlice<'a, T>> for IndicesSource<'a> where
T: Index,
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impl<'a, T> From<IndexBufferSlice<'a, T>> for IndicesSource<'a> where
T: Index,
fn from(buf: IndexBufferSlice<'a, T>) -> IndicesSource<'a>
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fn from(buf: IndexBufferSlice<'a, T>) -> IndicesSource<'a>
Performs the conversion.
impl<'a, 'r, T> From<&'r IndexBufferSlice<'a, T>> for IndicesSource<'a> where
T: Index,
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impl<'a, 'r, T> From<&'r IndexBufferSlice<'a, T>> for IndicesSource<'a> where
T: Index,
fn from(buf: &'r IndexBufferSlice<'a, T>) -> IndicesSource<'a>
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fn from(buf: &'r IndexBufferSlice<'a, T>) -> IndicesSource<'a>
Performs the conversion.
impl<'a, T> From<IndexBufferSlice<'a, T>> for BufferSlice<'a, [T]> where
T: Index,
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impl<'a, T> From<IndexBufferSlice<'a, T>> for BufferSlice<'a, [T]> where
T: Index,
fn from(b: IndexBufferSlice<'a, T>) -> BufferSlice<'a, [T]>
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fn from(b: IndexBufferSlice<'a, T>) -> BufferSlice<'a, [T]>
Performs the conversion.
impl<'a, T> Deref for IndexBufferSlice<'a, T> where
T: Index,
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impl<'a, T> Deref for IndexBufferSlice<'a, T> where
T: Index,
type Target = BufferSlice<'a, [T]>
The resulting type after dereferencing.
fn deref(&self) -> &BufferSlice<'a, [T]>
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fn deref(&self) -> &BufferSlice<'a, [T]>
Dereferences the value.
Auto Trait Implementations
impl<'a, T> !Send for IndexBufferSlice<'a, T>
impl<'a, T> !Send for IndexBufferSlice<'a, T>
impl<'a, T> !Sync for IndexBufferSlice<'a, T>
impl<'a, T> !Sync for IndexBufferSlice<'a, T>