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use std::{fmt, slice};
use std::intrinsics::transmute;
use crate::{
Error,
hub::core::{self, Mat},
Result,
sys,
};
pub trait ValidMatElement {
fn typ() -> i32;
}
macro_rules! valid_mat_element {
($rust_type: ty, $mat_type: expr) => {
impl ValidMatElement for $rust_type {
fn typ() -> i32 { $mat_type }
}
};
}
valid_mat_element!(u8, core::CV_8U);
valid_mat_element!(i8, core::CV_8S);
valid_mat_element!(u16, core::CV_16U);
valid_mat_element!(i16, core::CV_16S);
valid_mat_element!(i32, core::CV_32S);
valid_mat_element!(f32, core::CV_32F);
valid_mat_element!(f64, core::CV_64F);
valid_mat_element!(core::Vec2b, core::CV_8UC2);
valid_mat_element!(core::Vec3b, core::CV_8UC3);
valid_mat_element!(core::Vec4b, core::CV_8UC4);
valid_mat_element!(core::Vec2s, core::CV_16SC2);
valid_mat_element!(core::Vec3s, core::CV_16SC3);
valid_mat_element!(core::Vec4s, core::CV_16SC4);
valid_mat_element!(core::Vec2i, core::CV_32SC2);
valid_mat_element!(core::Vec3i, core::CV_32SC3);
valid_mat_element!(core::Vec4i, core::CV_32SC4);
valid_mat_element!(core::Vec2f, core::CV_32FC2);
valid_mat_element!(core::Vec3f, core::CV_32FC3);
valid_mat_element!(core::Vec4f, core::CV_32FC4);
valid_mat_element!(core::Vec2d, core::CV_64FC2);
valid_mat_element!(core::Vec3d, core::CV_64FC3);
valid_mat_element!(core::Vec4d, core::CV_64FC4);
valid_mat_element!(core::Scalar, core::CV_64FC4);
impl Mat {
#[inline(always)]
fn match_format<T: ValidMatElement>(&self) -> Result<()> {
let mat_type = self.typ()?;
let out_type = T::typ();
if mat_type == out_type {
Ok(())
} else {
Err(Error::new(core::StsUnmatchedFormats, format!("Mat type is: {}, but requested type is: {}", mat_type, out_type)))
}
}
#[inline(always)]
pub(crate) fn _at<T: ValidMatElement>(&self, i0: i32) -> Result<&T> {
self.match_format::<T>().and_then(|_| self.ptr(i0).map(|x| unsafe { &*(x as *const _ as *const T) }))
}
#[inline(always)]
pub(crate) fn _at_mut<T: ValidMatElement>(&mut self, i0: i32) -> Result<&mut T> {
self.match_format::<T>().and_then(|_| self.ptr_mut(i0).map(|x| unsafe { &mut *(x as *mut _ as *mut T) }))
}
#[inline(always)]
pub(crate) fn _at_2d<T: ValidMatElement>(&self, row: i32, col: i32) -> Result<&T> {
self.match_format::<T>().and_then(|_| self.ptr_2d(row, col).map(|x| unsafe { &*(x as *const _ as *const T) }))
}
#[inline(always)]
pub(crate) fn _at_2d_mut<T: ValidMatElement>(&mut self, row: i32, col: i32) -> Result<&mut T> {
self.match_format::<T>().and_then(|_| self.ptr_2d_mut(row, col).map(|x| unsafe { &mut *(x as *mut _ as *mut T) }))
}
#[inline(always)]
pub(crate) fn _at_3d<T: ValidMatElement>(&self, i0: i32, i1: i32, i2: i32) -> Result<&T> {
self.match_format::<T>().and_then(|_| self.ptr_3d(i0, i1, i2).map(|x| unsafe { &*(x as *const _ as *const T) }))
}
#[inline(always)]
pub(crate) fn _at_3d_mut<T: ValidMatElement>(&mut self, i0: i32, i1: i32, i2: i32) -> Result<&mut T> {
self.match_format::<T>().and_then(|_| self.ptr_3d_mut(i0, i1, i2).map(|x| unsafe { &mut *(x as *mut _ as *mut T) }))
}
pub fn at_row<T: ValidMatElement>(&self, i0: i32) -> Result<&[T]> {
let width = self.size()?.width as usize;
self._at(i0).map(|x| unsafe { slice::from_raw_parts(x, width) })
}
pub fn at_row_mut<T: ValidMatElement>(&mut self, i0: i32) -> Result<&mut [T]> {
let width = self.size()?.width as usize;
self._at_mut(i0).map(|x| unsafe { slice::from_raw_parts_mut(x, width) })
}
pub fn data<T: ValidMatElement>(&self) -> Result<&[T]> {
let total = self.total()?;
self._at(0).map(|x| unsafe { slice::from_raw_parts(x, total) })
}
pub fn data_mut<T: ValidMatElement>(&mut self) -> Result<&mut [T]> {
let total = self.total()?;
self._at_mut(0).map(|x| unsafe { slice::from_raw_parts_mut(x, total) })
}
#[inline]
pub fn from_slice<T: ValidMatElement + Copy>(s: &[T]) -> Result<Mat> {
Self::from_slice_2d(&[s])
}
pub fn from_slice_2d<T: ValidMatElement + Copy>(s: &[impl AsRef<[T]>]) -> Result<Mat> {
let row_count: i32 = s.len() as _;
let col_count: i32 = if row_count > 0 {
s[0].as_ref().len() as _
} else {
0
};
let mut out = Mat::new_rows_cols(row_count, col_count, T::typ())?;
for (row_n, row) in s.into_iter().enumerate() {
let trg = out.at_row_mut(row_n as _)?;
let src = row.as_ref();
if trg.len() != src.len() {
return Err(Error::new(core::StsBadArg, format!("Unexpected number of items: {} in a row index: {}, expected: {}", trg.len(), row_n, src.len())));
}
trg.copy_from_slice(src);
}
Ok(out)
}
pub fn to_vec_2d<T: ValidMatElement + Copy>(&self) -> Result<Vec<Vec<T>>> {
self.match_format::<T>().and_then(|_| {
let size = self.size()?;
let width = size.width as usize;
let data = self.data()?;
Ok((0..size.height)
.map(|row_n| {
let row_n = row_n as usize;
let mut row = Vec::with_capacity(width);
unsafe { row.set_len(width); }
row[0..width].copy_from_slice(&data[row_n * width..(row_n + 1) * width]);
row
})
.collect()
)
})
}
}
impl fmt::Debug for Mat {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("Mat")
.field("channels", &self.channels().unwrap())
.field("depth", &self.depth().unwrap())
.field("elem_size", &self.elem_size().unwrap())
.field("elem_size1", &self.elem_size1().unwrap())
.field("is_continuous", &self.is_continuous().unwrap())
.field("is_submatrix", &self.is_submatrix().unwrap())
.field("total", &self.total().unwrap())
.field("type", &self.typ().unwrap())
.field("size", &self.size().unwrap())
.finish()
}
}
mod private {
pub trait Sealed {}
}