[−][src]Struct processing::draw_parameters::AnySamplesPassedQuery
A query type that allows you to know whether any sample has been written to the output during the operations executed with this query.
OpenGL
This is usually a query of type GL_ANY_SAMPLES_PASSED
or
GL_ANY_SAMPLES_PASSED_CONSERVATIVE
.
However if the backend doesn't support conservative queries, glium will automatically fall
back to a non-conservative query. If the backend doesn't support either types but supports
GL_SAMPLES_PASSED
, then glium will automatically use a GL_SAMPLES_PASSED
query instead.
Methods
impl AnySamplesPassedQuery
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pub fn new<F>(
facade: &F,
conservative: bool
) -> Result<AnySamplesPassedQuery, QueryCreationError> where
F: Facade + ?Sized,
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facade: &F,
conservative: bool
) -> Result<AnySamplesPassedQuery, QueryCreationError> where
F: Facade + ?Sized,
Builds a new query.
If you pass true
for conservative
, then OpenGL may use a less accurate algorithm,
leading to a faster result but with more false positives.
impl AnySamplesPassedQuery
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pub fn is_ready(&self) -> bool
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Queries the counter to see if the result is already available.
pub fn get(self) -> bool
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Returns the value of the query. Blocks until it is available.
This function doesn't block if is_ready
would return true.
Note that you are strongly discouraged from calling this in the middle of the rendering process, as it may block for a long time.
Queries should either have their result written into a buffer, be used for conditional rendering, or stored and checked during the next frame.
pub fn to_buffer_u32(
&self,
target: BufferSlice<u32>
) -> Result<(), ToBufferError>
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&self,
target: BufferSlice<u32>
) -> Result<(), ToBufferError>
Writes the result of the query to a buffer when it is available.
This function doesn't block. Instead it submits a commands to the GPU's commands queue and orders the GPU to write the result of the query to a buffer.
This operation is not necessarily supported everywhere.
Trait Implementations
impl<'a> From<&'a AnySamplesPassedQuery> for SamplesQueryParam<'a>
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fn from(r: &'a AnySamplesPassedQuery) -> SamplesQueryParam<'a>
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impl Debug for AnySamplesPassedQuery
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impl GlObject for AnySamplesPassedQuery
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Auto Trait Implementations
impl !Send for AnySamplesPassedQuery
impl !Sync for AnySamplesPassedQuery
Blanket Implementations
impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T> From for T
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impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Same for T
type Output = T
Should always be Self
impl<SS, SP> SupersetOf for SP where
SS: SubsetOf<SP>,
SS: SubsetOf<SP>,
fn to_subset(&self) -> Option<SS>
fn is_in_subset(&self) -> bool
unsafe fn to_subset_unchecked(&self) -> SS
fn from_subset(element: &SS) -> SP
impl<T> SetParameter for T
fn set<T>(&mut self, value: T) -> <T as Parameter<Self>>::Result where
T: Parameter<Self>,
T: Parameter<Self>,
Sets value
as a parameter of self
.