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TextRenderer

Struct TextRenderer 

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pub struct TextRenderer { /* private fields */ }
Expand description

纯 Rust 文本回退渲染器。

使用 PdfReader 打开 PDF,逐页提取文本,并使用内置 5x7 位图字体 将其渲染为简单的光栅图像。输出适用于视觉保真度要求不高的 OCR 流水线。

§Examples

use std::path::Path;
use easypdf_markdown::render::backends::text_backend::TextRenderer;
use easypdf_markdown::render::{PdfRenderer, RenderConfig};

let renderer = TextRenderer::open(Path::new("document.pdf"))?;
let image = renderer.render_page(0, &RenderConfig::default())?;
image.save(Path::new("page_0.png"))?;

Implementations§

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impl TextRenderer

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pub fn open(path: &Path) -> Result<Self>

打开 PDF 文件进行基于文本的渲染。

§Errors

当文件无法读取时返回 RenderError::Io, 当 PDF 格式错误时返回 RenderError::Parse

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pub fn from_bytes(bytes: Vec<u8>) -> Result<Self>

从内存字节打开 PDF。

§Errors

当字节不是有效的 PDF 时返回 RenderError::Parse

Trait Implementations§

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impl PdfRenderer for TextRenderer

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fn render_page( &self, page_index: usize, config: &RenderConfig, ) -> Result<RenderedImage>

将单页渲染为 RGBA 像素缓冲区。 Read more
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fn name(&self) -> &'static str

此渲染后端的可读名称。
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fn max_dpi(&self) -> u32

此后端支持的最大 DPI。默认值:600。
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fn render_page_to_path( &self, page_index: usize, config: &RenderConfig, output: &Path, ) -> Result<()>

渲染单页并直接保存到文件路径。 Read more
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fn render_pages( &self, page_range: Range<usize>, config: &RenderConfig, ) -> Result<Vec<RenderedImage>>

渲染一个范围的页面。 Read more
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fn supports_vector(&self) -> bool

此后端是否支持矢量(SVG)输出。默认值:false

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