Struct ResourceManager 

pub struct ResourceManager { /* private fields */ }

Manages fonts, images, and other resources during editing.

Provides allocation and tracking of:

• Fonts (/F1, /F2, etc.)
• Images/XObjects (/Im1, /Im2, etc.)
• Graphics states (/GS1, /GS2, etc.)
• Patterns, shadings, etc.

Implementations

impl ResourceManager

pub fn new() -> Self

Create a new resource manager.

pub fn register_font(&mut self, font_name: &str) -> String

Register or get a font resource name.

Returns the resource name (e.g., “/F1”, “/F2”) for use in content streams. If a font with this name is already registered, returns the existing name.

Arguments

• font_name - Font name (e.g., “Helvetica”, “Times-Roman”)

Returns

Resource name to use in PDF content (e.g., “/F1”)

pub fn get_font_resource(&self, font_name: &str) -> Option<String>

Get a font resource name by its font name.

Returns None if the font is not registered.

pub fn fonts(&self) -> Vec<(String, String)>

List all registered fonts.

pub fn register_image(&mut self) -> String

Register an image/XObject resource.

Returns the resource name (e.g., “/Im1”, “/Im2”) for use in content streams.

pub fn images(&self) -> Vec<(String, String)>

List all registered images.

pub fn register_graphics_state(&mut self) -> String

Register a graphics state resource.

Returns the resource name (e.g., “/GS1”, “/GS2”).

pub fn graphics_states(&self) -> Vec<(String, String)>

List all registered graphics states.

pub fn register_pattern(&mut self) -> String

Register a pattern resource.

Returns the resource name (e.g., “/Pat1”, “/Pat2”).

pub fn patterns(&self) -> Vec<(String, String)>

List all registered patterns.

pub fn register_shading(&mut self) -> String

Register a shading (gradient) resource.

Returns the resource name (e.g., “/Sh1”, “/Sh2”).

pub fn shadings(&self) -> Vec<(String, String)>

List all registered shadings.

pub fn resource_count(&self) -> usize

Get a count of all registered resources.

pub fn clear(&mut self)

Clear all registered resources.

Trait Implementations

impl Clone for ResourceManager

fn clone(&self) -> ResourceManager

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResourceManager

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

Formats the value using the given formatter.

impl Default for ResourceManager

fn default() -> Self

Returns the “default value” for a type.