dear_imgui_wgpu/texture/
result.rs

1use super::*;
2
3/// Result of a texture update operation
4///
5/// This enum represents the outcome of a texture update operation and
6/// contains any state changes that need to be applied to the texture data.
7/// This follows Rust's principle of explicit state management.
8#[derive(Debug, Clone)]
9pub enum TextureUpdateResult {
10    /// Texture was successfully created
11    Created { texture_id: TextureId },
12    /// Texture was successfully updated
13    Updated,
14    /// Texture was destroyed
15    Destroyed,
16    /// Texture update failed
17    Failed,
18    /// No action was needed
19    NoAction,
20}
21
22impl TextureUpdateResult {
23    /// Apply the result to a texture data object
24    ///
25    /// This method updates the texture data's status and ID based on the operation result.
26    /// This is the Rust-idiomatic way to handle state updates.
27    pub fn apply_to(self, texture_data: &mut TextureData) {
28        match self {
29            TextureUpdateResult::Created { texture_id } => {
30                texture_data.set_tex_id(texture_id);
31                texture_data.set_status(TextureStatus::OK);
32            }
33            TextureUpdateResult::Updated => {
34                texture_data.set_status(TextureStatus::OK);
35            }
36            TextureUpdateResult::Destroyed => mark_texture_destroyed(texture_data),
37            TextureUpdateResult::Failed => {
38                texture_data.set_status(TextureStatus::Destroyed);
39            }
40            TextureUpdateResult::NoAction => {
41                // No changes needed
42            }
43        }
44    }
45}
46
47pub(super) fn mark_texture_destroyed(texture_data: &mut TextureData) {
48    unsafe {
49        // ImGui's SetStatus(Destroyed) has special semantics: if WantDestroyNextFrame is false,
50        // Destroyed may translate back to WantCreate. When honoring a requested destroy, set it
51        // before writing the final status.
52        (*texture_data.as_raw_mut()).WantDestroyNextFrame = true;
53    }
54    texture_data.set_status(TextureStatus::Destroyed);
55}
dear_imgui_wgpu/texture/result.rs

dear_imgui_wgpu/texture/
result.rs
