Method prepare_iter

src/rows.rs:160–177

(&mut self, temp_row: &mut [MaybeUninit<RGBA>], allow_steamed: bool)

    }

    pub fn prepare_iter(&mut self, temp_row: &mut [MaybeUninit<RGBA>], allow_steamed: bool) -> Result<(), Error> {
        debug_assert_eq!(temp_row.len(), self.width as _);

        if self.f_pixels.is_some() || (allow_steamed && self.should_use_low_memory()) {
            return Ok(());
        }

        let width = self.width();
        let lut = gamma_lut(self.gamma);
        let mut f_pixels = temp_buf(width * self.height())?;
        for (row, f_row) in f_pixels.chunks_exact_mut(width).enumerate() {
            let row_pixels = self.row_rgba(temp_row, row);
            Self::convert_row_to_f(f_row, row_pixels, &lut);
        }
        // just initialized
        self.f_pixels = Some(unsafe { box_assume_init(f_pixels) });
        Ok(())
    }

    #[inline]
    pub fn rows_iter(&mut self, temp_row: &mut [MaybeUninit<RGBA>]) -> Result<DynamicRowsIter<'_, 'pixels, 'rows>, Error> {