Trait GpuAsyncReadBufferTrait 

pub trait GpuAsyncReadBufferTrait: GpuAsyncReadBufferAsAny {
    // Required methods
    fn schedule_pixels_transfer(
        &self,
        framebuffer: &(dyn GpuFrameBufferTrait + 'static),
        color_buffer_index: u32,
        rect: Option<Rect<i32>>,
    ) -> Result<(), FrameworkError>;
    fn is_request_running(&self) -> bool;
    fn try_read(&self) -> Option<Vec<u8>>;
}

Trait for objects that represent a request to transfer pixel data from some frame buffer into a color buffer.

Required Methods

fn schedule_pixels_transfer( &self, framebuffer: &(dyn GpuFrameBufferTrait + 'static), color_buffer_index: u32, rect: Option<Rect<i32>>, ) -> Result<(), FrameworkError>

Begin the pixel data transfer by specifying a particular attachment of a particular framebuffer to read from.

• framebuffer: The source of the data.
• color_buffer_index: The index of the color attachment of the framebuffer.
• rect: The portion of the framebuffer to read.

After this is called, is_request_running will return true.

fn is_request_running(&self) -> bool

Return true if a request has been made and the data has not yet been retrieved with try_read. Returning false does not indicate that the data is read; this method will continue to return true long after the data is read, until try_read is called to actually read the data.

fn try_read(&self) -> Option<Vec<u8>>

Check the state of the data and return the data if it is read, or else return None. After the data is returned, is_request_running will return false.

Implementations

impl dyn GpuAsyncReadBufferTrait

pub fn try_read_of_type<T>(&self) -> Option<Vec<T>>

where T: Pod,

Check the state of the data and return the data if it is read, or else return None. The data is converted into the given type before being returned. After the data is returned, is_request_running will return false.

Implementors

impl GpuAsyncReadBufferTrait for GlAsyncReadBuffer