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Flash Accelerate

开启FlashPlayer硬件渲染加速

2015-02-06 يوللانغان نەشرى. ئەڭ يېڭى نەشرىنى كۆرۈش.

// ==UserScript==
// @name        Flash Accelerate
// @namespace   [email protected]
// @description 开启FlashPlayer硬件渲染加速
// @include     *
// @version     1.04
// @grant       none
// ==/UserScript==

//创意来自 gpu-accelerated-flash-player 扩展！
//是否有加速效果作者也不知道。
//只有当不存在 wmode 参数时才会开启加速
//关于wmode参数的解释：http://helpx.adobe.com/flash/kb/flash-object-embed-tag-attributes.html
//
//以下是脚本可选项：
var force_all = false; //默认 false，当为true时始终开启加速，忽略wmode是否存在，会覆盖下一个选项
var force_direct_gpu = false; //默认 false，当存在且wmode = direct 时开启加速
var wmodeValue = 'gpu'; //默认 gpu，可以是 direct。

setTimeout(function () {
  var objects = document.getElementsByTagName('object');
  var embeds = document.getElementsByTagName('embed');
  var has_wmode;
  var toggle = function (o) {
    //console.log(o.id);
    if (o) {
      o.style.display = 'none';
      setTimeout(function () {
        o.style.display = 'block';
      }, 0);
    }
  };
  //console.log(objects);
  if (objects.length > 0) {
    for (var i = 0; i < objects.length; i++) {
      has_wmode = false;
      for (var ii = 0; ii < objects[i].childNodes.length; ii++) {
        if (objects[i].childNodes[ii].name.toLowerCase() == 'wmode') {
          has_wmode = true;
          if (force_all) {
            objects[i].childNodes[ii].value = wmodeValue;
            toggle(objects[i]);
          } 
          else if (force_direct_gpu && objects[i].childNodes[ii].value == 'direct') {
            objects[i].childNodes[ii].value = wmodeValue;
            toggle(objects[i]);
          }
          break;
        }
      }
      if (!has_wmode) {
        var param = document.createElement('param');
        param.name = 'wmode';
        param.value = wmodeValue;
        objects[i].appendChild(param);
        toggle(objects[i]);
      }
    }
  }
  if (embeds.length > 0) {
    for (var i = 0; i < embeds.length; i++) {
      if (force_all) {
        embeds[i].setAttribute('wmode', wmodeValue);
        toggle(embeds[i]);
      }
      else if (force_direct_gpu && embeds[i].getAttribute('wmode') == 'direct') {
        embeds[i].setAttribute('wmode', wmodeValue);
        toggle(embeds[i]);
      }
      else if (!embeds[i].getAttribute('wmode')) {
        embeds[i].setAttribute('wmode', wmodeValue);
        toggle(embeds[i]);
      }
    }
  }
}, 1024); //延时时间可能存在问题。