调整应用图标小黄鸭占比

scripts/resize_duck_icon.py

@@ -0,0 +1,92 @@
+#!/usr/bin/env python3
+"""缩小小黄鸭在图标中的占比，并重新生成所有 mipmap 资源。"""
+
+from pathlib import Path
+from PIL import Image, ImageDraw
+
+# 项目路径
+APP_RES = Path(__file__).parent.parent / "app" / "src" / "main" / "res"
+
+# Android 标准密度对应比例
+DENSITIES = {
+    "mipmap-xhdpi": 2,      # 108 dp * 2 = 216 px
+    "mipmap-xxhdpi": 3,     # 108 dp * 3 = 324 px
+    "mipmap-xxxhdpi": 4,    # 108 dp * 4 = 432 px
+}
+
+# 小黄鸭缩放比例（0.75 = 占原来 75%）
+DUCK_SCALE = 0.75
+
+# 背景色取自 ic_launcher_background.xml
+BG_COLOR = (0x83, 0xD0, 0xF1, 0xFF)
+
+
+def make_rounded_mask(size: int, radius_ratio: float = 0.22) -> Image.Image:
+    """生成圆角矩形 mask（用于圆角方形图标）。"""
+    mask = Image.new("L", (size, size), 0)
+    draw = ImageDraw.Draw(mask)
+    radius = int(size * radius_ratio)
+    draw.rounded_rectangle((0, 0, size, size), radius=radius, fill=255)
+    return mask
+
+
+def make_circle_mask(size: int) -> Image.Image:
+    """生成圆形 mask（用于圆形图标）。"""
+    mask = Image.new("L", (size, size), 0)
+    draw = ImageDraw.Draw(mask)
+    draw.ellipse((0, 0, size, size), fill=255)
+    return mask
+
+
+def compose_icon(foreground: Image.Image, size: int, mask: Image.Image) -> Image.Image:
+    """将前景合成到纯色背景上，并应用形状 mask。"""
+    bg = Image.new("RGBA", (size, size), BG_COLOR)
+    # 将前景缩放到当前密度尺寸
+    fg = foreground.resize((size, size), Image.Resampling.LANCZOS)
+    bg.alpha_composite(fg)
+    # 应用形状 mask
+    result = Image.new("RGBA", (size, size), (0, 0, 0, 0))
+    result.paste(bg, (0, 0), mask)
+    return result.convert("RGB")
+
+
+def main():
+    # 读取最高分辨率前景图
+    src_fg = Image.open(APP_RES / "mipmap-xxxhdpi" / "ic_launcher_foreground.webp").convert("RGBA")
+    src_size = src_fg.size[0]
+
+    # 缩放鸭子内容，增加透明边距
+    new_size = int(src_size * DUCK_SCALE)
+    fg_resized = src_fg.resize((new_size, new_size), Image.Resampling.LANCZOS)
+
+    # 放置到原始尺寸透明画布中央
+    foreground_scaled = Image.new("RGBA", (src_size, src_size), (0, 0, 0, 0))
+    offset = (src_size - new_size) // 2
+    foreground_scaled.paste(fg_resized, (offset, offset), fg_resized)
+
+    for folder, scale in DENSITIES.items():
+        px = 108 * scale  # 自适应图标前景标准尺寸
+        folder_path = APP_RES / folder
+        folder_path.mkdir(parents=True, exist_ok=True)
+
+        # 生成新的前景 webp
+        fg = foreground_scaled.resize((px, px), Image.Resampling.LANCZOS)
+        fg.save(folder_path / "ic_launcher_foreground.webp", "WEBP", quality=95)
+
+        # 生成合成后的圆角方形和圆形 PNG
+        icon_size = 48 * scale  # 启动图标标准尺寸
+        rounded_mask = make_rounded_mask(icon_size)
+        circle_mask = make_circle_mask(icon_size)
+
+        compose_icon(fg, icon_size, rounded_mask).save(
+            folder_path / "ic_launcher.png", "PNG"
+        )
+        compose_icon(fg, icon_size, circle_mask).save(
+            folder_path / "ic_launcher_round.png", "PNG"
+        )
+
+        print(f"Generated {folder}: {px}x{px} foreground, {icon_size}x{icon_size} icons")
+
+
+if __name__ == "__main__":
+    main()