上次图片预览,显示压缩图片的一种处理方法:
def set_image_size #small_size = [172.0, 90.0] #设置图片大小为基础 size = [[172.0, 90.0], [280.0, 288.0]] #设置图片大小为基础 size.each_with_index do |small_size, index| img = MiniMagick::Image.open(self.path) w,h = img[:width], img[:height] zomm_size = 1 unless w < small_size[0] && h < small_size[1] zomm_size = w/small_size[0] >= h/small_size[1] ? small_size[0]/w : small_size[1]/h end img.resize "#{w*zomm_size}x#{(h*zomm_size)}" if index == 0 temp_image_disk = File.join(APP_CONFIG[:temp_image_path], self.id.to_s, "small") else temp_image_disk = File.join(APP_CONFIG[:temp_image_path], self.id.to_s, "middle") end FileUtils.mkdir_p(temp_image_disk) unless File.exist?(temp_image_disk) temp_image_path = File.join(temp_image_disk, self.filename) img.write(temp_image_path) end end