fix(jump-hop): clean magenta cutout fringes

server-rs/crates/platform-image/tests/generated_asset_sheets.rs

@@ -206,6 +206,78 @@ fn generated_asset_sheet_magenta_edge_matte_does_not_remove_white_subject() {
     );
 }
 
+#[test]
+fn generated_asset_sheet_magenta_alpha_defringes_pink_halo() {
+    let mut sheet = RgbaImage::from_pixel(24, 24, Rgba([255, 0, 255, 255]));
+    for y in 7..17 {
+        for x in 7..17 {
+            sheet.put_pixel(x, y, Rgba([198, 170, 120, 255]));
+        }
+    }
+    for y in 6..18 {
+        sheet.put_pixel(6, y, Rgba([226, 26, 218, 220]));
+        sheet.put_pixel(17, y, Rgba([226, 26, 218, 220]));
+    }
+    for x in 6..18 {
+        sheet.put_pixel(x, 6, Rgba([226, 26, 218, 220]));
+        sheet.put_pixel(x, 17, Rgba([226, 26, 218, 220]));
+    }
+
+    let cleaned = apply_generated_asset_sheet_alpha_with_options(
+        DynamicImage::ImageRgba8(sheet),
+        GeneratedAssetSheetAlphaOptions::jump_hop_magenta_screen(),
+    )
+    .to_rgba8();
+    let edge = cleaned.get_pixel(6, 12).0;
+
+    assert_eq!(cleaned.get_pixel(0, 0).0[3], 0);
+    assert_eq!(cleaned.get_pixel(12, 12).0, [198, 170, 120, 255]);
+    if edge[3] > 0 {
+        assert!(
+            edge[0].saturating_sub(edge[1]) <= 76,
+            "红色 key 通道残留过强：{edge:?}"
+        );
+        assert!(
+            edge[2].saturating_sub(edge[1]) <= 76,
+            "蓝色 key 通道残留过强：{edge:?}"
+        );
+    }
+}
+
+#[test]
+fn generated_asset_sheet_magenta_edge_matte_defringes_bottom_shadow() {
+    let mut sheet = RgbaImage::from_pixel(32, 32, Rgba([0, 0, 0, 0]));
+    for y in 8..18 {
+        for x in 10..22 {
+            sheet.put_pixel(x, y, Rgba([202, 176, 126, 255]));
+        }
+    }
+    for y in 18..22 {
+        for x in 9..23 {
+            sheet.put_pixel(x, y, Rgba([224, 30, 220, 186]));
+        }
+    }
+
+    let cleaned = crop_generated_asset_sheet_view_edge_matte_with_options(
+        DynamicImage::ImageRgba8(sheet),
+        GeneratedAssetSheetAlphaOptions::jump_hop_magenta_screen(),
+    )
+    .to_rgba8();
+
+    assert!(
+        cleaned
+            .pixels()
+            .any(|pixel| pixel.0 == [202, 176, 126, 255])
+    );
+    assert!(
+        !cleaned.pixels().any(|pixel| {
+            let [red, green, blue, alpha] = pixel.0;
+            alpha > 0 && red > 200 && blue > 200 && green < 96
+        }),
+        "底部洋红残影应被删除或去彩边"
+    );
+}
+
 #[test]
 fn generated_asset_sheet_view_edge_matte_trims_transparent_border() {
     let mut sheet = RgbaImage::from_pixel(20, 20, Rgba([0, 0, 0, 0]));