Merge pull request #2250 from Koranir/text-alpha-fix

Fix text transparency in tiny_skia renderer

CHANGELOG.md

@@ -80,6 +80,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `PaneGrid` click interaction on the top edge. [#2168](https://github.com/iced-rs/iced/pull/2168)
 - `iced_wgpu` not rendering text in SVGs. [#2161](https://github.com/iced-rs/iced/pull/2161)
 - Text clipping. [#2154](https://github.com/iced-rs/iced/pull/2154)
+- Text transparency in `iced_tiny_skia`. [#2250](https://github.com/iced-rs/iced/pull/2250)
 - Layout invalidation when `Tooltip` changes `overlay`. [#2143](https://github.com/iced-rs/iced/pull/2143)
 - `Overlay` composition. [#2142](https://github.com/iced-rs/iced/pull/2142)
 - Incorrect GIF for the `progress_bar` example. [#2141](https://github.com/iced-rs/iced/pull/2141)

tiny_skia/src/text.rs

@@ -238,6 +238,12 @@ fn draw(
                 )
                 .expect("Create glyph pixel map");
 
+                let opacity = color.a
+                    * glyph
+                        .color_opt
+                        .map(|c| c.a() as f32 / 255.0)
+                        .unwrap_or(1.0);
+
                 pixels.draw_pixmap(
                     physical_glyph.x + placement.left,
                     physical_glyph.y - placement.top
@@ -246,7 +252,10 @@ fn draw(
                             * transformation.scale_factor())
                         .round() as i32,
                     pixmap,
-                    &tiny_skia::PixmapPaint::default(),
+                    &tiny_skia::PixmapPaint {
+                        opacity,
+                        ..tiny_skia::PixmapPaint::default()
+                    },
                     tiny_skia::Transform::identity(),
                     clip_mask,
                 );