info "创建图片备份到 $BACKUP_DIR"

mkdir -p "$BACKUP_DIR"

for dir in "${IMG_DIRS[@]}"; do

if [ -d "$dir" ]; then

cp -r "$dir" "$BACKUP_DIR/" 2>/dev/null || true

fi

done

log "备份完成"

info "查找大于 500KB 的图片..."

local found=false

for dir in "${IMG_DIRS[@]}"; do

if [ -d "$dir" ]; then

while IFS= read -r file; do

if [ -n "$file" ]; then

found=true

size=$(du -h "$file" | cut -f1)

echo " $file ($size)"

fi

done < <(find "$dir" -type f \( -name "*.jpg" -o -name "*.jpeg" -o -name "*.png" \) -size +500k 2>/dev/null)

fi

done

if [ "$found" = false ]; then

log "没有发现大于 500KB 的图片"

fi

if ! command -v cwebp &> /dev/null; then

warn "cwebp 未安装，跳过 WebP 转换"

info "安装方法: brew install webp (macOS) 或 apt-get install webp (Linux)"

return

fi

info "开始 WebP 转换 (质量: $QUALITY)..."

local count=0

for dir in "${IMG_DIRS[@]}"; do

if [ -d "$dir" ]; then

while IFS= read -r file; do

local webp="${file%.*}.webp"

if [ ! -f "$webp" ] || [ "$file" -nt "$webp" ]; then

cwebp -q "$QUALITY" "$file" -o "$webp" 2>/dev/null && ((count++)) || true

fi

done < <(find "$dir" -type f \( -name "*.jpg" -o -name "*.jpeg" -o -name "*.png" \) 2>/dev/null)

fi

done

log "创建了 $count 个 WebP 文件"

if ! command -v convert &> /dev/null; then

warn "ImageMagick 未安装，跳过压缩"

info "安装方法: brew install imagemagick (macOS)"

return

fi

info "开始图片压缩 (质量: 75%)..."

local count=0

local total_saved=0

for dir in "${IMG_DIRS[@]}"; do

if [ -d "$dir" ]; then

while IFS= read -r file; do

original_size=$(du -k "$file" | cut -f1)

convert "$file" -quality 75 -strip "$file" 2>/dev/null || continue

new_size=$(du -k "$file" | cut -f1)

saved=$((original_size - new_size))

total_saved=$((total_saved + saved))

((count++))

done < <(find "$dir" -type f \( -name "*.jpg" -o -name "*.jpeg" -o -name "*.png" \) 2>/dev/null)

fi

done

log "压缩了 $count 张图片，节省 ${total_saved}KB"

echo ""

info "图片统计:"

echo "============"

local total=0

for dir in "${IMG_DIRS[@]}"; do

if [ -d "$dir" ]; then

count=$(find "$dir" -type f \( -name "*.jpg" -o -name "*.jpeg" -o -name "*.png" -o -name "*.gif" -o -name "*.webp" \) 2>/dev/null | wc -l | tr -d ' ')

total=$((total + count))

fi

done

echo "总图片数: $total"

du -sh "${IMG_DIRS[@]}" 2>/dev/null | while read size dir; do

echo " $dir: $size"

done

echo -e "${GREEN}🖼️ 图片优化脚本${NC}"

echo "=================="

echo ""

create_backup

check_large_images

# 解析参数

if [[ "$1" == "--compress" ]]; then

compress_with_imagemagick

fi

if [[ "$1" == "--webp" || -z "$1" ]]; then

convert_to_webp

fi

show_stats

echo ""

log "图片优化完成！"

info "备份位置: $BACKUP_DIR"