chore: `derive(Default)` for enums

It's available since stable Rust 1.62.0.

core/src/config.rs

@@ -6,7 +6,7 @@ use serde::{Deserialize, Serialize};
 ///
 /// When letterboxed, black bars will be rendered around the exterior
 /// margins of the content.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Collect, Serialize, Deserialize)]
+#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, Collect, Serialize, Deserialize)]
 #[collect(require_static)]
 #[serde(rename = "letterbox")]
 pub enum Letterbox {
@@ -16,15 +16,10 @@ pub enum Letterbox {
 
     /// The content will only be letterboxed if the content is running fullscreen.
     #[serde(rename = "fullscreen")]
+    #[default]
     Fullscreen,
 
     /// The content will always be letterboxed.
     #[serde(rename = "on")]
     On,
 }
-
-impl Default for Letterbox {
-    fn default() -> Self {
-        Letterbox::Fullscreen
-    }
-}

core/src/display_object/stage.rs

@@ -767,7 +767,7 @@ pub struct ParseEnumError;
 
 /// The scale mode of a stage.
 /// This controls the behavior when the player viewport size differs from the SWF size.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Collect)]
+#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, Collect)]
 #[collect(require_static)]
 pub enum StageScaleMode {
     /// The movie will be stretched to fit the container.
@@ -783,15 +783,10 @@ pub enum StageScaleMode {
 
     /// The movie will scale to fill the container and maintain its aspect ratio, but will be letterboxed.
     /// This is the default scale mode.
+    #[default]
     ShowAll,
 }
 
-impl Default for StageScaleMode {
-    fn default() -> StageScaleMode {
-        StageScaleMode::ShowAll
-    }
-}
-
 impl Display for StageScaleMode {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         // Match string values returned by AS.
@@ -840,7 +835,7 @@ impl FromWStr for StageScaleMode {
 
 /// The scale mode of a stage.
 /// This controls the behavior when the player viewport size differs from the SWF size.
-#[derive(Debug, Clone, Copy, PartialEq, Eq, Collect)]
+#[derive(Default, Debug, Clone, Copy, PartialEq, Eq, Collect)]
 #[collect(require_static)]
 pub enum StageDisplayState {
     /// Sets AIR application or content in Flash Player to expand the stage over the user's entire screen.
@@ -852,15 +847,10 @@ pub enum StageDisplayState {
     FullScreenInteractive,
 
     /// Sets the stage back to the standard stage display mode.
+    #[default]
     Normal,
 }
 
-impl Default for StageDisplayState {
-    fn default() -> StageDisplayState {
-        StageDisplayState::Normal
-    }
-}
-
 impl Display for StageDisplayState {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         // Match string values returned by AS.
@@ -972,7 +962,7 @@ impl FromWStr for StageAlign {
 /// In the Flash Player, this settings affects anti-aliasing and bitmap smoothing.
 /// These settings currently have no effect in Ruffle, but the active setting is still stored.
 /// [StageQuality in the AS3 Reference](https://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/display/StageQuality.html)
-#[derive(Clone, Collect, Copy, Debug, Eq, PartialEq)]
+#[derive(Default, Clone, Collect, Copy, Debug, Eq, PartialEq)]
 #[collect(require_static)]
 pub enum StageQuality {
     /// No anti-aliasing, and bitmaps are never smoothed.
@@ -982,6 +972,7 @@ pub enum StageQuality {
     Medium,
 
     /// 4x anti-aliasing.
+    #[default]
     High,
 
     /// 4x anti-aliasing with high quality downsampling.
@@ -1025,12 +1016,6 @@ impl StageQuality {
     }
 }
 
-impl Default for StageQuality {
-    fn default() -> StageQuality {
-        StageQuality::High
-    }
-}
-
 impl Display for StageQuality {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         // Match string values returned by AS.
@@ -1099,7 +1084,7 @@ impl FromWStr for StageQuality {
 /// the page. This setting is only used on web.
 ///
 /// [Apply OBJECT and EMBED tag attributes in Adobe Flash Professional](https://helpx.adobe.com/flash/kb/flash-object-embed-tag-attributes.html)
-#[derive(Clone, Collect, Copy, Debug, Eq, PartialEq)]
+#[derive(Default, Clone, Collect, Copy, Debug, Eq, PartialEq)]
 #[collect(require_static)]
 pub enum WindowMode {
     /// The Flash content is rendered in its own window and layering is done with the browser's
@@ -1107,6 +1092,7 @@ pub enum WindowMode {
     ///
     /// In Ruffle, this mode functions like `WindowMode::Opaque` and will layer the Flash content
     /// together with other HTML elements.
+    #[default]
     Window,
 
     /// The Flash content is layered together with other HTML elements, and the stage color is
@@ -1128,12 +1114,6 @@ pub enum WindowMode {
     Direct,
 }
 
-impl Default for WindowMode {
-    fn default() -> WindowMode {
-        WindowMode::Window
-    }
-}
-
 impl Display for WindowMode {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         let s = match *self {

core/src/font.rs

@@ -496,11 +496,12 @@ impl FontDescriptor {
 /// This is controlled by the "Anti-alias" setting in the Flash IDE.
 /// Using "Anti-alias for readibility" switches to the "Advanced" text
 /// rendering engine.
-#[derive(Debug, PartialEq, Clone, Collect)]
+#[derive(Default, Debug, PartialEq, Clone, Collect)]
 #[collect(require_static)]
 pub enum TextRenderSettings {
     /// This text should render with the standard rendering engine.
     /// Set via "Anti-alias for animation" in the Flash IDE.
+    #[default]
     Default,
 
     /// This text should render with the advanced rendering engine.
@@ -521,12 +522,6 @@ impl TextRenderSettings {
     }
 }
 
-impl Default for TextRenderSettings {
-    fn default() -> Self {
-        TextRenderSettings::Default
-    }
-}
-
 impl From<swf::CsmTextSettings> for TextRenderSettings {
     fn from(settings: swf::CsmTextSettings) -> Self {
         if settings.use_advanced_rendering {

swf/src/types.rs

@@ -561,8 +561,9 @@ pub struct GradientBevelFilter {
     pub num_passes: u8,
 }
 
-#[derive(Clone, Copy, Debug, Eq, FromPrimitive, PartialEq)]
+#[derive(Default, Clone, Copy, Debug, Eq, FromPrimitive, PartialEq)]
 pub enum BlendMode {
+    #[default]
     Normal = 0,
     Layer = 2,
     Multiply = 3,
@@ -588,12 +589,6 @@ impl BlendMode {
     }
 }
 
-impl Default for BlendMode {
-    fn default() -> Self {
-        BlendMode::Normal
-    }
-}
-
 /// An clip action (a.k.a. clip event) placed on a MovieClip instance.
 /// Created in the Flash IDE using `onClipEvent` or `on` blocks.
 ///
@@ -1122,8 +1117,9 @@ impl Default for LineStyleFlag {
     }
 }
 
-#[derive(Clone, Copy, Debug, Eq, FromPrimitive, PartialEq)]
+#[derive(Default, Clone, Copy, Debug, Eq, FromPrimitive, PartialEq)]
 pub enum LineCapStyle {
+    #[default]
     Round = 0,
     None = 1,
     Square = 2,
@@ -1136,27 +1132,14 @@ impl LineCapStyle {
     }
 }
 
-impl Default for LineCapStyle {
-    #[inline]
-    fn default() -> Self {
-        Self::Round
-    }
-}
-
-#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+#[derive(Default, Clone, Copy, Debug, Eq, PartialEq)]
 pub enum LineJoinStyle {
+    #[default]
     Round,
     Bevel,
     Miter(Fixed8),
 }
 
-impl Default for LineJoinStyle {
-    #[inline]
-    fn default() -> Self {
-        Self::Round
-    }
-}
-
 #[derive(Clone, Copy, Debug, Eq, FromPrimitive, PartialEq)]
 pub enum AudioCompression {
     UncompressedUnknownEndian = 0,