Struct WgpuTextureManager 

pub struct WgpuTextureManager { /* private fields */ }

Texture manager for WGPU renderer

This manages the mapping between Dear ImGui texture IDs and WGPU textures, similar to the ImageBindGroups storage in the C++ implementation.

Implementations

impl WgpuTextureManager

pub fn new() -> Self

Create a new texture manager

pub fn register_texture(&mut self, texture: WgpuTexture) -> u64

Register a new texture and return its ID

pub fn get_texture(&self, id: u64) -> Option<&WgpuTexture>

Get a texture by ID

pub fn remove_texture(&mut self, id: u64) -> Option<WgpuTexture>

Remove a texture by ID

pub fn contains_texture(&self, id: u64) -> bool

Check if a texture exists

pub fn insert_texture_with_id(&mut self, id: u64, texture: WgpuTexture)

Insert a texture with a specific ID

pub fn destroy_texture_by_id(&mut self, id: u64)

Destroy a texture by ID

pub fn update_texture_from_data_with_id( &mut self, device: &Device, queue: &Queue, texture_data: &TextureData, texture_id: u64, ) -> RendererResult<()>

Update an existing texture from Dear ImGui texture data with specific ID

pub fn texture_count(&self) -> usize

Get the number of registered textures

pub fn clear(&mut self)

Clear all textures

impl WgpuTextureManager

Texture creation and management functions

pub fn create_texture_from_data( &mut self, device: &Device, queue: &Queue, texture_data: &TextureData, ) -> RendererResult<u64>

Create a texture from Dear ImGui texture data

pub fn update_texture_from_data( &mut self, device: &Device, queue: &Queue, texture_data: &TextureData, ) -> RendererResult<()>

Update an existing texture from Dear ImGui texture data

pub fn destroy_texture(&mut self, texture_id: TextureId)

Destroy a texture

pub fn handle_texture_updates( &mut self, draw_data: &DrawData, device: &Device, queue: &Queue, render_resources: &mut RenderResources, )

Handle texture updates from Dear ImGui draw data

This iterates DrawData::textures() and applies create/update/destroy requests. For WantCreate, we create the GPU texture, then write the generated id back into the ImTextureData via set_tex_id() and mark status OK (matching C++ backend). For WantUpdates, if a valid id is not yet assigned (first use), we create now and assign the id; otherwise we update in place. When textures are recreated or destroyed, the corresponding cached bind groups in RenderResources are invalidated so that subsequent draws will see the updated views.

pub fn update_single_texture( &mut self, texture_data: &TextureData, device: &Device, queue: &Queue, ) -> RendererResult<TextureUpdateResult>

Update a single texture based on its status

This corresponds to ImGui_ImplWGPU_UpdateTexture in the C++ implementation.

Returns

Returns a TextureUpdateResult that contains the operation result and any status/ID updates that need to be applied to the texture data. This follows Rust’s principle of explicit state management.

Example

let result = texture_manager.update_single_texture(&texture_data, &device, &queue)?;
result.apply_to(&mut texture_data);

Trait Implementations

impl Debug for WgpuTextureManager

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

Formats the value using the given formatter.

impl Default for WgpuTextureManager

fn default() -> Self

Returns the “default value” for a type.