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// SPDX-License-Identifier: LGPL-3.0-or-later
/*
* libopenraw - bitmap.rs
*
* Copyright (C) 2022-2023 Hubert Figuière
*
* This library is free software: you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
//! Trait and types for various bitmap data, iamges, etc. and other
//! geometry.
use crate::DataType;
/// An image buffer carries the data and the dimension. It is used to
/// carry pipeline input and ouput as dimensions can change.
pub struct ImageBuffer<T> {
pub(crate) data: Vec<T>,
pub(crate) width: u32,
pub(crate) height: u32,
/// bits per channel
pub(crate) bpc: u16,
/// number of channel
pub(crate) cc: u32,
}
impl<T> ImageBuffer<T> {
/// Create an image buffer.
pub(crate) fn with_data(data: Vec<T>, width: u32, height: u32, bpc: u16, cc: u32) -> Self {
Self {
data,
width,
height,
bpc,
cc,
}
}
/// Return the pixel RGB value at `x` and `y`.
pub fn pixel_at(&self, x: u32, y: u32) -> Option<Vec<T>>
where
T: Copy,
{
if x > self.width || y > self.height {
return None;
}
let pos = ((y * self.width * self.cc) + x * self.cc) as usize;
let pixel = &self.data[pos..pos + self.cc as usize];
Some(pixel.to_vec())
}
}
impl ImageBuffer<f64> {
pub fn into_u16(self) -> ImageBuffer<u16> {
ImageBuffer::<u16>::with_data(
self.data
.iter()
.map(|v| (*v * u16::MAX as f64).round() as u16)
.collect(),
self.width,
self.height,
16,
self.cc,
)
}
}
impl ImageBuffer<u16> {
pub fn into_f64(self) -> ImageBuffer<f64> {
ImageBuffer::<f64>::with_data(
self.data
.iter()
.map(|v| *v as f64 / u16::MAX as f64)
.collect(),
self.width,
self.height,
16,
self.cc,
)
}
}
/// Trait for bitmap objects.
pub trait Bitmap {
fn data_type(&self) -> DataType;
/// The data size is bytes
fn data_size(&self) -> usize;
/// Pixel width
fn width(&self) -> u32;
/// Pixel height
fn height(&self) -> u32;
/// Bits per component
fn bpc(&self) -> u16;
/// Image data in 8 bits
fn data8(&self) -> Option<&[u8]>;
}
pub trait Image: Bitmap {
/// Image data in 16 bits
fn data16(&self) -> Option<&[u16]>;
}
/// Rectangle struct.
#[derive(Clone, Debug, Default, PartialEq)]
pub struct Rect {
pub x: u32,
pub y: u32,
pub width: u32,
pub height: u32,
}
impl Rect {
pub fn new(origin: Point, size: Size) -> Rect {
Rect {
x: origin.x,
y: origin.y,
width: size.width,
height: size.height,
}
}
/// Generate a `Vec<u32>` with the values in x, y, w, h order.
pub fn to_vec(&self) -> Vec<u32> {
[self.x, self.y, self.width, self.height].to_vec()
}
}
/// Point struct
#[derive(Debug, PartialEq)]
pub struct Point {
pub x: u32,
pub y: u32,
}
/// Size struct
#[derive(Debug, PartialEq)]
pub struct Size {
pub width: u32,
pub height: u32,
}
/// Encapsulate data 8 or 16 bits
pub(crate) enum Data {
Data8(Vec<u8>),
Data16(Vec<u16>),
Tiled((Vec<Vec<u8>>, (u32, u32))),
}
impl Default for Data {
fn default() -> Data {
Data::Data16(Vec::default())
}
}
impl std::fmt::Debug for Data {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::result::Result<(), std::fmt::Error> {
f.write_str(&match *self {
Self::Data8(ref v) => format!("Data(Data8([{}]))", v.len()),
Self::Data16(ref v) => format!("Data(Data16([{}]))", v.len()),
Self::Tiled((ref v, sz)) => format!("Data(Tiled([{}], {:?}))", v.len(), sz),
})
}
}
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