Enum RenderError 

#[non_exhaustive]
pub enum RenderError {
    Io(Error),
    Parse(String),
    InvalidPage {
        index: usize,
        total: usize,
    },
    BackendUnavailable {
        name: &'static str,
        reason: String,
    },
    ImageEncode(String),
    DpiExceeded {
        requested: u32,
        max: u32,
    },
    InvalidOutput(PathBuf),
    Other(String),
}

PDF 页面渲染过程中可能发生的错误。

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Io(Error)

发生 I/O 错误（读取 PDF 或写入输出）。

Parse(String)

PDF 无法解析或格式错误。

InvalidPage

请求的页码索引超出范围。

Fields

index: usize

请求的页码索引（从 0 开始）。

total: usize

文档总页数。

BackendUnavailable

请求的渲染后端不可用。

Fields

name: &'static str

后端名称。

reason: String

不可用原因。

ImageEncode(String)

图像编码失败（PNG/JPEG）。

DpiExceeded

请求的 DPI 超过后端最大值。

Fields

requested: u32

请求的 DPI。

max: u32

后端最大 DPI。

InvalidOutput(PathBuf)

输出路径不是有效的目标。

Other(String)

其他渲染错误的兜底变体。

Trait Implementations

impl Debug for RenderError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for RenderError

fn fmt(&self, __formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Error for RenderError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<Error> for RenderError

fn from(source: Error) -> Self

Converts to this type from the input type.