Struct ImageLimitSettings 

pub struct ImageLimitSettings {
    pub max_dimension: u32,
    pub max_pixels: u64,
    pub dimensions_cache_ttl_secs: u64,
}

图片处理尺寸限制与尺寸缓存配置。

需重启生效层：值在进程启动时烘焙进 LazyLock，改 DB 值后需重启才生效。

Fields

max_dimension: u32

图片单边（宽或高）尺寸上限（像素）。

max_pixels: u64

允许处理的最大图片像素数。⚠️ 此值同时决定单图解码内存缓冲 （max_alloc = pixels × 4 + 1MB），默认 50M 像素对应约 200MB/图。

dimensions_cache_ttl_secs: u64

图片尺寸缓存 TTL（秒）。

Implementations

impl ImageLimitSettings

pub fn clamp_max_dimension(n: u32) -> u32

将单边尺寸钳制到合法范围 [MIN, ∞)。

pub fn clamp_max_pixels(n: u64) -> u64

将像素总数钳制到合法范围 [MIN, ∞)。

pub fn clamp_dimensions_cache_ttl_secs(n: u64) -> u64

将尺寸缓存 TTL 钳制到合法范围 [MIN, ∞)。

Trait Implementations

impl Clone for ImageLimitSettings

fn clone(&self) -> ImageLimitSettings

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ImageLimitSettings

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

Formats the value using the given formatter.

impl Default for ImageLimitSettings

fn default() -> Self

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ImageLimitSettings

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for ImageLimitSettings

fn eq(&self, other: &ImageLimitSettings) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ImageLimitSettings

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for ImageLimitSettings