Struct PrepareFrameContext 

pub struct PrepareFrameContext<'a> { /* private fields */ }

Pre-frame access to Context-owned resources without frame lifecycle authority.

Resource mutations are allowed here, but opening or rendering the frame remains owned by the runtime:

use dear_app::PrepareFrameContext;

fn steal_frame(context: &mut PrepareFrameContext<'_>) {
    context.imgui().begin_frame();
}

Implementations

impl PrepareFrameContext<'_>

pub fn window(&self) -> &Window

impl PrepareFrameContext<'_>

pub fn io(&self) -> &Io

Borrows Dear ImGui IO without exposing frame lifecycle operations.

pub fn io_mut(&mut self) -> &mut Io

Mutates Dear ImGui IO without exposing frame lifecycle operations.

pub fn style(&self) -> &Style

Borrows the global Dear ImGui style.

pub fn style_mut(&mut self) -> &mut Style

Mutates the global Dear ImGui style.

pub fn font_atlas(&self) -> &FontAtlas

Borrows the Context-owned font atlas.

pub fn register_texture( &mut self, texture: OwnedTextureData, ) -> ManagedTextureId

Transfers an owned texture into the Context-managed texture registry.

pub fn with_texture<R>( &self, id: ManagedTextureId, operation: impl for<'texture> FnOnce(ManagedTextureRef<'texture>) -> R, ) -> Result<R, ManagedTextureError>

Reads a managed texture through a non-escaping capability.

pub fn with_texture_mut<R>( &mut self, id: ManagedTextureId, operation: impl for<'texture> FnOnce(ManagedTextureMut<'texture>) -> R, ) -> Result<R, ManagedTextureError>

Mutates a managed texture through a non-escaping capability.

pub fn try_with_texture_mut<R>( &mut self, id: ManagedTextureId, operation: impl for<'texture> FnOnce(ManagedTextureMut<'texture>) -> Result<R, TextureDataError>, ) -> Result<R, ManagedTextureMutationError>

Mutates a managed texture while flattening access and data-validation errors.

pub fn remove_texture( &mut self, id: ManagedTextureId, ) -> Result<(), ManagedTextureError>

Retires a managed texture after outstanding renderer work completes.