docs + fixed warnings

editor/src/asset/preview/mod.rs

@@ -35,10 +35,7 @@ use crate::{
         engine::{Engine, GraphicsContext},
         fxhash::FxHashMap,
         graph::{BaseSceneGraph, SceneGraphNode},
-        graphics::{
-            framebuffer::ReadTarget,
-            gpu_texture::{GpuTextureKind, PixelKind},
-        },
+        graphics::{framebuffer::ReadTarget, gpu_texture::GpuTextureKind},
         gui::{
             font::Font, formatted_text::WrapMode, screen::ScreenBuilder, text::TextBuilder,
             widget::WidgetBuilder, HorizontalAlignment, UserInterface, VerticalAlignment,

editor/src/ui_scene/mod.rs

@@ -41,7 +41,6 @@ use crate::{
         engine::Engine,
         fxhash::FxHashSet,
         graph::{BaseSceneGraph, SceneGraph},
-        graphics::gpu_texture::PixelKind,
         gui::{
             brush::Brush,
             draw::{CommandTexture, Draw},

fyrox-impl/src/renderer/ui_renderer.rs

@@ -96,11 +96,19 @@ pub struct UiRenderContext<'a, 'b, 'c> {
     pub resource_manager: &'a ResourceManager,
 }
 
+/// Contains all the info required to render a user interface.
 pub struct UiRenderInfo<'a> {
+    /// A render target to render a user interface (UI) to. If [`None`], then the UI will be rendered
+    /// to the screen directly.
     pub render_target: Option<TextureResource>,
+    /// Screen size for the UI. In most cases, it should be `ui.screen_size()`.
     pub screen_size: Vector2<f32>,
+    /// A drawing content of a UI. In most cases, it should be `ui.draw()`.
     pub drawing_context: &'a DrawingContext,
+    /// A color that will be used to fill a render target before rendering of the UI. Ignored if the
+    /// render target is [`None`] and nothing will be cleared.
     pub clear_color: Color,
+    /// A reference to the resource manager.
     pub resource_manager: &'a ResourceManager,
 }