Struct Image 

pub struct Image { /* private fields */ }

Image 类型

独立的图片对象，提供编解码功能

Implementations

impl Image

pub fn from_encoded(data: &[u8]) -> ImageResult<Self>

从字节数据解码图片

参数

• data - 图片的字节数据

示例

use image_renderer::Image;

let bytes = std::fs::read("image.png").unwrap();
let image = Image::from_encoded(&bytes).unwrap();

pub fn from_surface(surface: Surface) -> Self

从 Surface 创建 Image

pub fn encode( &self, format: ImageFormat, quality: Option<u8>, ) -> ImageResult<Vec<u8>>

编码图片为指定格式

参数

• format - 目标图片格式
• quality - 质量参数（仅对 JPEG 有效，范围 0-100）

示例

use image_renderer::{Image, ImageFormat};

let image = Image::from_encoded(&bytes).unwrap();
let png_bytes = image.encode(ImageFormat::PNG, None).unwrap();
let jpeg_bytes = image.encode(ImageFormat::JPEG, Some(90)).unwrap();

pub fn width(&self) -> u32

获取图片宽度

pub fn height(&self) -> u32

获取图片高度

pub fn dimensions(&self) -> (u32, u32)

获取图片尺寸

pub fn surface(&self) -> &Surface

获取内部 Surface 的引用

pub fn surface_mut(&mut self) -> &mut Surface

获取内部 Surface 的可变引用

pub fn into_surface(self) -> Surface

转换为 Surface

pub fn get_pixel(&self, x: u32, y: u32) -> Option<Rgba<u8>>

获取指定位置的像素

pub fn crop(&self, x: u32, y: u32, width: u32, height: u32) -> ImageResult<Self>

裁剪图片

pub fn resize(&self, width: u32, height: u32) -> ImageResult<Self>

调整图片大小

pub fn peek_pixels(&self) -> Pixmap<'_>

获取像素数据视图

返回一个 Pixmap，提供对图片像素数据的只读访问

示例

use image_renderer::{Image, IPoint};

let image = Image::from_encoded(&bytes).unwrap();
let pixmap = image.peek_pixels();
let color = pixmap.get_color(IPoint::new(10, 10));

Trait Implementations

impl Clone for Image

fn clone(&self) -> Image

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl From<Image> for Surface

fn from(image: Image) -> Self

Converts to this type from the input type.

impl From<Surface> for Image

fn from(surface: Surface) -> Self

Converts to this type from the input type.